Kinetic energy of a moving body can be determined using mass and velocity. Kinetic energy of the cat of mass 9 kg and velocity of 4 m/s is 72 J.
What is kinetic energy?The kinetic energy of an object is the energy generated by virtue of its motion. It is related to its mass and velocity by the expression written below:
Ke = 1/2 m v²
Thus, kinetic energy increases with mas and velocity. When the body starts moving from rest, its potential energy converts to kinetic energy.
Given that, mass of the cat = 9 kg
velocity of the ball = 4m/s
then Ke = 1/2 × 9 kg × 4 m/s × 4 m/s = 72 J
The energy of the body when it is moving is in the form of kinetic energy.
Hence, the kinetic energy of the cat is 72J.
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Upon failure of the normal supply, a legally required standby system is required to be available in ? or less.
a. 40 seconds 701.12
b. 50 seconds 701.12
c. 60 seconds 701.12
d. 70 seconds 701.12
Upon failure of the normal supply, a legally required standby system is required to be available in 40 seconds or less. This information is specified by the code 701.12, which pertains to the requirements for standby power systems. So the correct option is a.
The specific time requirement for the standby system to be available may vary depending on the type of facility, the criticality of its operations, and the local and national codes that apply to it. Standby power systems are designed to provide power to a facility in the event of a power outage or other disruption to the normal power supply. These systems can include generators, battery systems, and other forms of backup power.
The standby power system must be able to provide power to critical systems, such as life safety equipment, emergency lighting, and communications systems, in the event of a failure of the normal power supply. The requirement for a standby power system is particularly important in facilities that provide essential services, such as hospitals, emergency services, and data centers.
These facilities rely on a consistent power supply to ensure the safety and well-being of patients, staff, and the community. A standby power system ensures that critical systems will continue to function even in the event of a power outage, thereby minimizing the risk of injury or harm to individuals.
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a fisherman throws the iron anchor from his floating boat into the lake. does the level of the lake rise, fall, or stay unchanged?
When the fisherman throws the iron anchor from his floating boat into the lake the level of the pond falls.
With the introduction of the "CQR," created by Scottish inventor Geoffrey Ingram Taylor in the early 1930s, modern boat anchor development has progressed rather independently from that of the first half of the 20th century. Since this design was asymmetrical, bow rollers had to be used to efficiently stow it. This works well for small yachts and boats, but it doesn't scale well for huge cargo. Lewmar is now the company producing the CQR.In the 1940s, American Richard Danforth created and refined the "Danforth" pattern, a nod to symmetry but with very broad flat plate flukes. This anchor performs poorly in other areas but has very good holding power for its weight (high efficiency), making it ineffective.
While the anchor is in the boat, its weight displaces a volume of water V1 equal in weight to the anchor (by Archimedes' principle). After being thrown overboard, the sunken anchor displaces a lesser volume of water V2, equal in volume to the anchor.
V2 is less than V1 because the anchor is denser than water (otherwise it would not sink!) So, with less water displaced, the level of the lake falls.
Therefore, When the fisherman throws the iron anchor from his floating boat into the lake the level of the pond falls.
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When liquid helium is exposed to room temperature, it forms a gas. Which best explains why this happens?
Answer:
the liquid helium absorbs energy from the air in the room
How does using a small paper clip help to measure the strength of an electromagnet?
How does using a large paper clip help to measure the strength of an electromagnet?
The small paper clip means the less strength of an electromagnet. Whereas large paper clip means higher strength of an electromagnet.
How can electromagnet be used?The measure of the magnet's strength can be accounted by counting the number of paper clips your electromagnet can lift. A specific quantity of mass can only be picked up by each electromagnet that is produced. More light things and fewer heavier ones are picked up by the electromagnet.
An electromagnet's or solenoid's magnetic field strength is determined by the coil's length L, current flow rate (in amps), and number (N) of turns.
The amount of paper clips held grows with the number of spins. This indicates that as the coil's turns rise, so does the magnet's strength.
Since paperclips are not magnetic by nature, they cannot be chained together on their own. The paperclips can, however, be momentarily magnetic by employing a magnet. A paper clip's steel can be easily magnetic, but it quickly loses its magnetism.
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When a pendulum is swinging and it is at its highest point which energy store has filled?
When a pendulum is swinging and it is at its highest point, Potential energy store has filled.
The kinetic energy of the pendulum is zero, as the velocity of the bob is zero at this point.
Potential Energy is the energy that an object possesses due to its position or configuration. It is the energy that an object has due to its height above some reference point. In the case of a pendulum, the potential energy is stored in the bob due to its height above the lowest point of its swing. As the pendulum swings back and forth, the potential energy of the bob is converted into kinetic energy as it falls, and then back into potential energy as it reaches the highest point of its swing.
At the highest point of the swing, the bob has the maximum potential energy and zero kinetic energy. As the pendulum swings, the potential energy will decrease and the kinetic energy will increase. At the lowest point of the swing, the bob will have zero potential energy and maximum kinetic energy.
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in this guided lab you determined the approximate depth of the mt. vesuvius crater. (round your answers to the nearest whole number.) what is the depth of the crater in meters?
In Guided Lab 1, the distance from the center of the Mt. Vesuvius crater to the coast was found and it is approximately 7 kilometers.
The distance can be determined using different methods such as using a map and a ruler, using GIS software or a mapping website, such as Maps, or using a GPS device or smartphone app.
It is important to note that this distance may vary depending on the measurement method and location, and it should be a rough estimation.
Mt Vesuvius is an active volcano located on the east coast of the Italian Peninsula, southeast of Naples, it is one of the most dangerous volcanoes in the world due to its proximity to the city of Naples, it last erupted in 1944. The volcano has a crater that is about 800 meters wide and 140 meters deep.
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HELP ME ASPP PLEASE THANK YOU
Heating curve
the temperature of a substance as the average kinetic energy of all the atoms or molecules of that substance
What is heating curve?Heating curves show how the temperature changes as a substance is heated up. Cooling curves are the opposite. They show how the temperature changes as a substance is cooled down. Just like heating curves, cooling curves have horizontal flat parts where the state changes from gas to liquid, or from liquid to solid.A heating curve is a plot or graph wherein a substance is subjected to increasing temperature against time to measure the amount of energy it absorbs and changes state with increasing temperatureTemperature increase: liquid heating up requires 1 calorie for each increase of 1 degree Celsius for each 1 gram of water [so 1 g of liquid water increasing from the melting point (0 degrees Celsius) to the boiling point (100 degrees Celsius) requires 100 calories]To learn more about heating curve refers to:
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Remember, the girls are studying Newton's 2nd law: F = ma. The teacher asked the girls to hypothesize about the acceleration in each one of the four trials. Then they would use their data to calculate "a" or acceleration in the formula. Help them out. What would hypothesize about the value of "a" in this experiment?
They are the foundation of classical mechanics.
What is the difference between a hypothesis theory and a law?A hypothesis is a speculative explanation that may be tested by more research. A theory is a well-supported explanation for observed phenomena. A scientific law is a summary of the relationship between variables. A regulated way of evaluating a hypothesis is an experiment. A significant feature shared by a scientific hypothesis, theory, and rule is that they are all founded on observations. A scientific observer notices a phenomena and attempts to explain what they saw.
The terms “IF” and “THEN.” Are frequently used in hypothesis writing. “If I do not study, then I will fail the test.” For example. Your independent and dependent variables are reflected in the “if” and “then” statements. Your theory should be related to your
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experiment begins with block horizontal. one end of board is slowly raised. which identifies the block that will start sliding down first and why?
Block 1 will begin to slide down first because of its smaller coefficient of friction. The right answer is, therefore, B.
The coefficient of static friction (μ) between two surfaces is a measure of the amount of force that is required to overcome the forces holding the two surfaces together and start them sliding against each other. The coefficient of friction depends on the properties of the two surfaces in contact and typically ranges from 0 (no friction) to 1 (maximum friction).
In this experiment, Block 1 has a coefficient of static friction of 0.20 and Block 2 has a coefficient of static friction of 0.40. This means that it takes more force to start Block 2 sliding than it does to start Block 1 sliding. Therefore, Block 1 will start sliding down the board first. The reason is that the coefficient of friction is smaller for Block 1 than for Block 2, which means the block has less resistance to sliding and will move more easily.
This question isn't complete, and answer choices should be added, which are:
In an experiment, two blocks of different roughness are placed on the same rough wooden board. The table below shows three values for each block: the mass, the area of the block in contact with the board, and the coefficient of static friction μ? between the block and the board. The experiment begins with the board horizontal. One end of the board is then slowly raised.
Block 1 : mass (kg) is 0.75 - area 75 square centimeters - μ 0.20. Block 2 : mass (kg) is 3.0 - area 100 square centimeters - μ 0.40.Which of the following correctly identifies the block that will start sliding down the board first and why?
A. Block 1 because it has less mass per unit area.B. Block 1 because the coefficient of friction is smaller.C. Block 2 because it has greater mass.D. Block 2 because it has a smaller surface area.E. Block 2 because the coefficient of friction is larger.The correct answer is B.
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Is kinetic energy high or low?
Kinetic energy is high when an object is moving at a fast speed. It is low when an object is moving at a slow speed or is at rest.
A sort of energy that an object has because it is in motion is called kinetic energy. It is calculated as the product of the object's mass and the square of its velocity. The formula for kinetic energy is KE = 1/2 * m * v^2, where m is the object's mass and v is its velocity. The unit of kinetic energy is typically joules (J) in the International System of Units (SI). When an object's velocity increases, its kinetic energy also increases. Conversely, when an object's velocity decreases, its kinetic energy decreases. An object has no kinetic energy when it is at rest. Kinetic energy is an important concept in many areas of physics, such as mechanics, thermodynamics, and atmospheric science. It plays a role in understanding the motion of objects, the effects of force and energy, and the behavior of gases and fluids.
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the time period of planet x around sun is 8 times that of y. the distance of x from the sun is how many times greater than that of y?
The distance of planet X from the sun is 8 times greater than that of planet Y.
The time period of a planet around the sun is directly proportional to the distance of the planet from the sun. The relationship between the time period and distance of a planet around the sun is given by the formula T^2 = k*r^3, where T is the time period, r is the distance of the planet from the sun and k is a constant.
Given that the time period of planet X around the sun is 8 times that of planet Y.
T_x = 8 * T_y
We can square the equation, we have:
T_x^2 = 8^2 * T_y^2
We can divide the above equation by the constant k, we have:
r_x^3 = 8^2 * r_y^3
We can take the cube root of both sides, we have:
r_x = (8^2 * r_y^3)^(1/3)
r_x = 8 * r_y
So the distance of planet X from the sun is 8 times greater than that of planet Y.
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The Moon's velocity changes continuously as it orbits the earth, bat on average its translational velocity comes out to about 2.3 kilometers per second. what is tthis speed in proper SI units
Answer:
Explanation:brbejkw
a rubber rod exerts no electric force on a small electrically neutral scrap of paper. after it is rubbed on cat fur for several seconds, the rod exerts an attractive force on the scrap. part a is the force exerted by the fur on the same scrap attractive or repulsive?
The force exerted by the fur on the scrap would be attractive.
When something is rubbed with cat fur, electrons are transferred from the fur to the object being rubbed, resulting in the object becoming electrically charged. Since like charges repel one another, the scrap would be charged with the same type of charge as the rod, resulting in an attractive force between the two.
The magnitude of the force of attraction is determined by several factors, including the type of material, the distance between the two particles, and the amount of charge on each particle. Generally, the closer the two particles are and the greater the charge on each particle, the stronger the attractive force will be.
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An ice skater initially skating at a velocity of 3 m/s speeds up to a velocity of 5 m/s. The momentumof the skaterA Remains the sameB IncreasesC Becomes zeroD Decreases
The relationship between mass and speed and momentum is straightforward. The object's momentum increases proportionally to changes in either mass or velocity. Momentum is doubled by doubling mass or speed.
The Correct Answer is Option C.
What is the Law of Conservation of Momentum?Momentum is the result of the product of an object's mass and velocity, and it is a property shared by all moving objects. This can be expressed as an equation, where p stands for momentum, as follows: p = m v. As a result of an object's variable velocity, it also has a variable momentum. The momentum of an object system can be explained by the Law of Conservation of Momentum. The Law of Conservation of Momentum teaches us that the overall momentum of an isolated system stays constant. When there are no external influences on the system's objects, the system is said to be isolated. Here is a picture of Newton's Cradle, which is a great way to illustrate momentum conservation.As the ball's momentum is transferred to the ball at the other end, the system's overall momentum is conserved when one ball moves and collides with the others in this situation.To Learn more About momentum refer To:
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How hazardous are car batteries?
Recharging, moving, or shaking a lead-acid battery can produce an explosive mixture of hydrogen and oxygen gases that escape through the battery's vents. These fumes, if allowed to accumulate in a small area, ignite easily and can cause a fire or explosion.
Environmental impact of car batteriesBattery recycling of automotive batteries reduces the need for resources required for the manufacture of new batteries, diverts toxic lead from landfills, and prevents the risk of improper disposal. Once a lead–acid battery ceases to hold a charge, it is deemed a used lead-acid battery (ULAB), which is classified as hazardous waste under the Basel Convention.
The 12-volt car battery is the most recycled product in the world, according to the United States Environmental Protection Agency. In the U.S. alone, about 100 million auto batteries a year are replaced, and 99 percent of them are turned in for recycling. However, the recycling may be done incorrectly in unregulated environments. As part of global waste trade, ULABs are shipped from industrialized countries to developing countries for disassembly and recuperation of the contents. About 97 percent of the lead can be recovered. Pure Earth estimates that over 12 million Third-World people are affected by lead contamination from ULAB processing.
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A ring of charge is centered at the origin in the vertical direction. The ring has a charge density of λ = 4. 48 × 10 − 6 C/m λ=4. 48×10−6 C/m and a radius of R = 2. 71 cm. R=2. 71 cm. Find the total electric field, E , E, of the ring at the point P = ( 1. 10 m, 0. 00 m). P=(1. 10 m, 0. 00 m). The Coulomb force constant is k = 1 / ( 4 π ϵ 0 ) = 8. 99 × 10 9 N ⋅ m 2 / C 2
The value of electric field is 0.150 × 10 ⁻⁶ V/m.
Given,
Radius = 2. 71 cm = 0.0271 m, So, 2лг = Сircumference
Charge density = 4. 48 × 10 ⁻⁶ C/m
k = 1 / ( 4 π ϵ 0 ) = 8. 99 × 10⁹ N ⋅ m 2 / C 2
Total charge = 2πr × λ
Electric potential= [tex]K \frac{q}{r} = \frac{1}{4. \pi. \epsilon o} . \frac{2 \pi r \lambda}{[x^{2} +r^{2}]^{1/2} }[/tex]
= 8. 99 × 10⁹ × [2 π × 0.0271 × 4. 48 ×10 ⁻⁶ ] / √10² + 0.0271²
= 8. 99 × 10⁹ × [0.72 × 10 ⁻⁶] / 10
So, Electric field = V /r cosθ
After substituting the values,
we get
⇒ [tex]\frac{ r\lambda x }{2 \epsilon o (x^{2} + r^{2} )^{3/2} }[/tex]
⇒ [0.0271 m . 4. 48 × 10 ⁻⁶. 1. 10] / [2εο × (10)^(3/2)]
⇒ 0.133 × 10 ⁻⁶ × 56.45 × 10⁹ / 500
⇒ 0.150 × 10 ⁻⁶ V/m
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What does it mean when there is no kinetic energy?
The kinetic energy of an item is 0 if it is not moving. There can never be a negative number for kinetic energy. Kinetic energy (KE) is defined as the product of the mass times the square of the velocity.
Kinetic energy, often known as the energy of motion, may be seen in the motion of things and subatomic particles. Kinetic energy may be found in all particles and moving objects. Examples of kinetic energy in action include a person walking, a baseball flying through the air, food tumbling off a table, and a charged particle in an electric field. Kinetic energy may be calculated as follows: K.E. is defined as the product of the square of the velocity and the mass of an object, or m/v2. The kinetic energy is given in kilogram-meter squared per second squared if the mass is measured in kilogrammes and the velocity is measured in metres per second.
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An electric kettle with shinny outer surface is more efficient than one with a dull outer surface. Give a reason for this
The shinny outer surface of an electric kettle reflects heat, which reduces energy loss. This helps to make the kettle more efficient, as it takes less energy to heat the water to the desired temperature.
What is the energy ?
Energy is the capacity for doing work. It is a fundamental concept in physics, and is defined as the ability to do work or transfer heat. It is a measurable quantity that can be converted into different forms, such as mechanical, electrical, thermal, chemical, or nuclear energy. Energy is necessary for all types of physical activities, including movement, growth, and development. It is also necessary for many natural processes, such as photosynthesis and respiration. In addition, energy is used to power many of the technologies we use in everyday life, such as computers and cars.
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the accumulation of excess electric charge on an object is called
The pendulum of a clock is displaced by a distance of 4.0 cm and it oscillates in s.h.m. with a with a period of 1 s.
a. calculate the maximum velocity of the pendulum bob.
Its velocity when its displacement is 2.0 cm
How do you find the velocity of a pendulum bob?As the pendulum swings downward, gravity converts this potential energy into kinetic energy, so that at the bottom of the swing, the pendulum bob has zero potential energy, and its kinetic energy, (1/2)mv2, equals the inital potential energy (mgh). (So the velocity, v, equals √(2gh).)he maximum velocity occurs at the equilibrium position ( x = 0 ) ( x = 0 ) when the mass is moving toward x = + A x = + A Terminal velocity is the maximum velocity (speed) attainable by an object as it falls through a fluid (air is the most common example). It occurs when the sum of the drag force (Fd) and the buoyancy is equal to the downward force of gravity (FG) acting on the object.To learn more about velocity of a pendulum bob refers to:
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a ray of light strikes a mirror at an angle of 38 to normal. what is the angle between the incident rayt and the reflected ray
The angle between the incident ray and the reflected ray for a ray of light at an angle of 38° to the normal is 76°.
The angle of incidence, in geometric optics, is the angle between a ray incident on a surface and the line perpendicular (at a 90° angle) to the surface at the point of incidence, called the normal. The angle of reflection is the angle between a reflected ray and the normal drawn at the point of incidence to a reflecting surface.
The angle at which the light falls on the mirror is 38° to the normal. So the angle of incidence is 38°. Then the angle between the incident ray and the reflected ray is 38°+38°= 76°.
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If the pressure on an object, submerged in an unknown fluid is 637,000Pa at a depth of 57.52 m, what is the object's density?
Answer: not very sure
=11074.4089
Explanation:
637000/57.52 = 11074.4089
A class __ lever never has a mechanical advantage.
A class __ lever always has a mechanical advantage.
A class __ lever could go either way.
O 3; 2; 1
O 2; 1; 3
O 2; 3; 1
O 1; 2; 3
A class 3 lever never has a mechanical advantage.
A class 2 lever always has a mechanical advantage.
A class 1 lever could go either way.
Therefore, the correct answer option is: A. 3; 2; 1.
What is mechanical advantage?In Science, mechanical advantage can be defined as a ratio of the output force of a lever to the force acting on it (input force or effort), assuming no losses due to wear, flexibility, tear or friction.
This ultimately implies that, different lever designs can be suitably engineered and developed to alter the brake pedal effort (input force) that is required of the driver, especially by using different levels of mechanical advantage.
In conclusion, a 3rd class lever is the most common in the body and it is a type of lever that never has a mechanical advantage.
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Answer:
(Question)
A class __ lever never has a mechanical advantage.
A class __ lever always has a mechanical advantage.
A class __ lever could go either way.
(Answer)
3;2;1
(Question)
A lever is used to lift an object with a weight of 60 Newtons. The effort force is 15 meters from the fulcrum, while the load force is 5 meters from the fulcrum. What is the mechanical advantage?
(Answer)
3
(Question)
With which class of levers is it possible to increase the force that must be applied?
(Answer)
class 1 and 3
(Question)
600 Joules of work is used to lift a box from the ground to a height of six meters. How much work would have been done if a lever would have been used with an effort arm of 12 meters and a load arm of 6 meters?
(Answer)
600 J
(Question)
A lever with an effort arm of 10 meters and a load arm of 2 meters is used to lift an object weighing 220 Newtons to a height of 4 meters. If 400Joules of work is done, how much force must have been applied?
(Answer)
100 N
Explanation:
i just finished the quick check UwU
what component acts as small sized switches and is used to close an electric circuit when the button is pressed?
A relay is a type of electrically operated switch that is used to close or open a circuit when an external switch or button is pressed.
What is circuit?A circuit is an interconnected system of components, such as resistors, capacitors, and transistors, that allow an electric current to flow through them, producing a desired electrical effect. Electric circuits are used in a variety of applications, from powering lights and motors to powering computers and the internet. Creating a circuit involves connecting the components in such a way that the current will flow in a closed loop, allowing energy to be transferred from one component to another.
It is a small-sized switch that is typically used in low voltage or high current applications. A relay consists of an electromagnet, which is activated when an electric current is passed through it, and a set of contacts that open or close the circuit when the electromagnet is activated. In a relay, the electromagnet is powered by a low voltage source and the contacts are powered by a higher voltage source. When the switch or button is pressed, the electromagnet is activated, which causes the contacts to close or open the circuit, depending on the type of relay.
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Fig. 4.1 shows a device used as a thermocouple thermometer.
In the table put three ticks against the correct statements about the thermocouple
thermometer
Thermocouple, thermometer a temperature-measuring device consisting of two wires of different metals joined at each end.
One junction is placed where the temperature is to be measured, and the other is kept at a constant lower temperature. Meter connected in middle measures potential difference.
Hence correct statements are :
1. Meter Z measures potential difference
2. Materials X and Y are different materials.
3. Materials X and Y are electrical conductors.
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The correct statements are :
1. Meter Z measures potential difference
2. Materials X & Y are different materials.
3. Materials X & Y are electrical conductors.
What is a Thermocouple?Two wires of various metals are joined at each end to form a thermocouple, a temperature-measuring instrument. The junction that will be used to measure temperature is placed there, and the other junction is maintained at a lower temperature at all times. Potential difference is measured by a metre connected in the middle.
A thermocouple, also referred to as a "thermoelectrical thermometer," is an electrical component made up of two conductors that are not similar to one another and that come together to form an electrical junction. The Seebeck effect causes a thermocouple to generate a voltage that is temperature-dependent, and this voltage can be used to calculate the temperature. Temperature sensors that are commonly used are thermocouples.
Commercial thermocouples can measure a wide range of temperatures, are reasonably priced, interchangeable, and come with standardised connectors. Thermocouples don't need an external source of excitation and are self-powered, unlike the majority of other temperature measurement techniques. Accuracy is thermocouples' main drawback; it can be challenging to achieve system errors of less than one degree Celsius (°C).
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why is it harder to breathe when climbing up a high mountain?
As altitude increases, the air becomes thinner and less oxygen-saturated.
At sea level, around a fifth of the air you breathe is oxygen and the air pressure is around 760 mmHg. As altitude increases, pressure decreases and the air becomes ‘thinner’. Higher pressure at sea level keeps oxygen molecules compressed together in air, so it is easier for us to breathe the amount we need in just one breath. At higher altitudes, the molecules spread out and in the same single breath there are fewer oxygen molecules and we need to work much harder to get the same amount of oxygen
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a cart is being pushed downwards with a force of 125 n at an angle of 30 and it is moving at a velocity of 12.58 what is the friction force
The friction force, a force that opposes motion between two surfaces that are in contact is 64.98 N.
Friction force arises due to the roughness of the surfaces in contact, as well as the nature of the materials that make up the surfaces. There are two types of friction: static friction and kinetic friction.
Static friction is the force that prevents an object from moving when a force is applied to it, while kinetic friction is the force that opposes motion once an object is already in motion.
Calculate the normal force:
F_normal=mgcosθ
= (125 kg)(9.81 m/s^2)cos(30°)
= 972.86 N
Calculate the coefficient of friction:
μ = Friction force / Normal force
= 64.98 N / 972.86 N
= 0.066
Calculate the friction force:
F_friction = μN
= (0.066)(972.86 N)
= 64.98 N
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identify the type of solar radiation that is absorbed by stratospheric ozone, and describe one human health benefit that results from the absorption of this solar energy.
Radiation that has been absorbed is ultraviolet radiation. Lower incidences of skin cancer, eye damage, and sunburns are all benefits to human health.
Ultraviolet (UV) energy from the sun is filtered by stratospheric ozone, a naturally occurring gas. Since it lessens the negative effects of ultraviolet (UV-B) light, this is commonly referred to as good ozone.
The ozone layer in the stratosphere prevents a portion of solar radiation from reaching the surface of the planet. The UV B part of UV radiation is what it absorbs most significantly. The ultraviolet light known as UV B, which is produced by the sun and sunlamps, has a number of negative effects.
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an object has a mechanical energy of 1575 J and a potential energy of 1265 J. a.what is the kinetik energy of the object. b. if the mass of the object is 12 Kg, what is the speed . c. how high above ground is the object.
The kinetic energy of the object is 310 joule.
The speed of the object is 7.19 m/s.
The height of the object is 10.75 meter.
What is energy?Energy is the quantitative quality that is transferred to a body or to a physical system in physics. Energy is a preserved resource.
a) The kinetic energy of the object = mechanical energy - potential energy
= 1575 J -1265 J
= 310 joule.
b) the speed of the object = √(2 × 310/12) m/s
= 7.19 m/s
c) Height of the object = 1265 ÷ (12 × 9.8) meter
= 10.75 meter.
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How do we use or encounter electromagnetic waves in everyday life?
Some common everyday uses for electromagnetic waves are Wireless local area networks (Wi-Fi), cell phones, radio broadcasting, cooking, and even cancer treatment.
EM waves, or electromagnetic waves, are generated when an electric field and a magnetic field cause vibrations. Radio waves, microwaves, infrared, visible, ultraviolet, X-rays, and gamma rays are the seven different types of electromagnetic waves.
There are numerous applications for radio waves, including media broadcasting, wireless communication, radio telescopes, etc. Microwaves are utilized widely in wireless networks, satellite and spacecraft communications, microwave radio relay networks, medical treatment, remote sensing, particle accelerators, radio astronomy, and spectroscopy, among other applications. Infrared wavelengths enable us to track and monitor the temperature patterns of the Earth. They are also utilized for thermal imaging and remote digital device controls. X-rays are renowned for their use in medical imaging. Gamma radiations are created by nuclear processes, nuclear decay, and star explosions, among other phenomena.
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