Pure water is not so much conductive, and only a small piece of current can move during the water. When salt or sodium chloride (NaCl) is melted in it, Yet, the salt molecules divided into two pieces, a sodium ion and a chlorine ion.
The sodium ion is lost an electron, that gives it a positive charge. The chlorine ion has an more electron, giving it a negative charge.
An electric origin sending a current through water will have two terminals: one is negative that conducts electrons into the water, and another is positive one that removes them.
Opposite charges attract, so the sodium ions are engaged to the negative terminal, and the chlorine to the positive.
The ions form a bridge, the sodium ions fascinating electrons from the negative terminal, passing them to chlorine ions and then the positive terminal.
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Select the correct answer. when would the velocity of a wave traveling in a medium change? a. only if a property of the wave changes b. only if a property of the medium changes c. if a property of both the wave and the medium changes d. never
The velocity of a wave traveling in a medium change if a property of both the wave and the medium changes. The correct answer is c.
The velocity of a wave is determined by the properties of both the wave and the medium it is traveling through. For example, the velocity of a light wave in a vacuum is constant, but it changes when it passes through a medium such as glass or water.
Similarly, the velocity of a sound wave in air will be affected by changes in temperature and humidity. So, both the wave's properties and medium properties are important to determine the velocity of wave.
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What is the kinetic energy of a 5.0 kg?
The kinetic energy of a 5.0 kg is 2.5v² Joule. We assume that the object is moving.
What is kinetic energy?Kinetic energy is the energy of an object due to its motion. So, if an object is moving, it has kinetic energy.
The energy is equal to half mass of an object multiplied by the square of its velocity. The statement can be expressed as
KE = ½ mv²
Where
KE = kinetic energy (J)m = mass of object (kg)v = velocity of object (m/s)Find the kinetic energy of an object with a mass of 5.0 kg!
We have
m = 5.0 kgWhen the object is moving, it has
v = velocity of the objectIt would have the kinetic energy of
KE = ½ mv²
KE = ½ (5.0)v²
KE = 2.5v² Joule
Hence, a 5.0 kg of object will have the kinetic energy of 2.5v² Joule.
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what does the pressure at a point in a fluid depend on?
-The density of the fluid.
-The pressure at the fluid's surface.
-The depth of that point within the fluid.
-The weight of the fluid directly above that point.
The pressure at a point in a fluid depends on the density of the fluid.
The correct option is A.
What is fluid pressure?The pressure of the fluid is the pressure the fluid exerts as a result of its height above the ground as well as its density.
A fluid's pressure is inversely correlated with its height above a certain point and its specific gravity or density there.
The fluid pressure is also called static fluid pressure or hydrostatic pressure.
There are several units of pressure such as pounds per square inch and bar, units of atmospheric pressure, etc.
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if the mass of earth were increased by a factor of 9.00 , by how many times would the force between earth and the sun increase?
The gravitational force between the Earth and the Sun would increase to 9 times the original force. The result is obtained by using the concept of Newton's law of universal gravitation.
What is the Newton's law of universal gravitation?The Newton's law of universal gravitation states that every object with the mass in the universe attracts to each other. The pulling force is called gravitational force. The gravitational force can be expressed as
F = Gm₁m₂/r²
Where
F = gravitational forceG = gravitational constatm₁ and m₂ = mass of objectsr = distance of mass of objectsIf a mass of Earth were increased by a factor of 9, find the gravitational force between the Earth and the Sun would be!
Let's say
m = mass of the EarthM = mass of the SunWithout increasing the mass of the Earth, the gravitational force is
F = GMm/r²
The mass is increasing 9 times. So, now the mass of the Earth is 9m.
The gravitational force would be
F₁ = GM(9m)/r²
F₁ = 9(GMm/r²)
F₁ = 9F
Hence, the gravitational force would increase to 9 times the original force.
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(a) a space vehicle is launched vertically upward from the earth's surface with an initial speed of 7.11 km/s, which is less than the escape speed of 11.2 km/s. what maximum height does it attain?
The maximum height would be -3818.75 km. As the space vehicle is launched vertically upward, the maximum height is negative as it never reaches that height.
Height refers to the distance above a reference point, typically sea level or the surface of the Earth. In the context of the problem provided, the height being referred to is the distance above the surface of the Earth that the space vehicle reaches at its highest point during its flight.
The maximum height attained by the space vehicle can be determined using the equation:
h =[tex](v^2 - v_e^2) / (2g)[/tex]
where h is the maximum height, v is the initial velocity, v_e is the escape velocity, and g is the acceleration due to gravity (approximately [tex]9.8 m/s^2)[/tex].
Plugging in the given values:
h = [tex](7.11 km/s)^2 - (11.2 km/s)^2 / (2*9.8 m/s^2)[/tex]
Converting the velocity in km/s to m/s and solving the equation:
h = [tex](7,110 m/s)^2 - (11,200 m/s)^2 / (2*9.8 m/s^2)[/tex]
h = [tex](50,521,000 m^2/s^2) - (125,440,000 m^2/s^2) / (19.6 m/s^2)[/tex]
h = -[tex]74,919,000 m^2/s^2 / 19.6 m/s^2[/tex]
h = -3818.75 km
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What is the kinetic energy of a 10kg 10 kg object moving at 2.0m s 2.0 m s?
The kinetic energy of a 10kg object moving at 2.0m/s is 20 joule.
What is kinetic energy?According to the definition of kinetic energy in physics, it is the amount of work that an item may accomplish while in motion. As a scalar quantity, kinetic energy can only be fully defined by its magnitude.
Mass of the object = 10 kg.
Speed of the object = 2.0 m/s.
Hence, kinetic energy of the object = 1/2 × mass × speed²
= 1/2 × 10 kg ×( 2.0 m/s)²
= 20 Joule.
So, kinetic energy of the object is 20 Joule.
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suppose you have a line graph with kilometers on the y-axis and minutes on the x-axis. if your line indicates that in 2.0 min you travel 0.4 km and in 5.0 min you travel 1.0 km. what is the slope of the line
a graph is a visual representation or diagram that shows facts or values in an ordered way. The relationships between two or more items are frequently represented by the points on a graph.
What is Graph?
Here, for instance, we can plot a graph showing the type and quantity of school supplies used by pupils in a class based on the data provided below.
Each supply is first counted, and the data is then shown in a table with specific colors in a logical order.
The term "pictograph" refers to the visual depiction of information. Each graphic represents a specified number of objects. To show how many cricket bats a store sold during a certain week, for instance, you could include a picture of a cricket bat.
Therefore, a graph is a visual representation or diagram that shows facts or values in an ordered way. The relationships between two or more items are frequently represented by the points on a graph.
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What is an objects centripetal acceleration if the force acting upon it is 34N and it has a
mass of 36kg?
(round to two decimal places)
According to Newton's second law of motion, a net force causes the acceleration of mass according to Fnet = ma.
What is centripetal acceleration ?
The acceleration of a body traversing a circular path. Because velocity is a vector quantity (that is, it has both a magnitude, the speed, and a direction), when a body travels on a circular path, its direction constantly changes and thus its velocity changes, producing an acceleration.A centripetal force is a net force that acts on an object to keep it moving along a circular path.If you whirl a ball on a string over your head, the ball is undergoing centripetal acceleration. If you drive your car around in a circle, your car is undergoing centripetal acceleration. And, a satellite orbiting the Earth also has a centripetal acceleration.To learn more about force refers to:
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5260J of energy was lost when a 1Kg unknown substance is dropped in water and cooled 8.2K. What is the probable substance?
The probable substance that was dropped in water and lost 5260J of energy is calsium.
How to calculate specific heat capacity?Specific heat is the heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).
According to this question, 5260J of energy was lost when a 1kg (1000g) unknown substance is dropped in water and cooled 8.2K. The specific heat of the substance can be calculated as follows:
Q = mc∆T
Where;
Q = amount of heat absorbed or releasedm = massc = specific heat∆T = change in temperature5260 = 1000 × c × 8.2
5260 = 8200c
c = 0.641 J/gK
Therefore, based on the above specific heat of the substance, the substance can be identified as calsium.
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a student carry carries a 10 kg stack of books 15 ml on a soccer field she carries the book at a constant height of 1 m and works with a constant speed how much work done did the student do on the book
Work done by the student is 0J.
What is meant by work done?When an object is moved over a distance by an external force, at least a portion of that force must be applied in the direction of the displacement. This is known as work in physics.
Work = Force × Distance is the formula for calculating work. The joule (J), sometimes known as the Newton meter (N m), is the SI unit for work. When an object is moved across a distance of 1 m with 1 N of force, one joule is equal to the amount of work that is accomplished.
The correct response is 0J since it is stated that she is carrying the book and since we know the force is acting perpendicular to the ground, cos 90 = 0, which means the force is zero.
Using the formula W = F s
. W = 0 × 50 m
= O J
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how far from the surface will a particle go if it leaves the asteroid's surface with a radial speed of 1000 m/s
If the gravitational force is negligible, the particle will travel indefinitely away from the asteroid's surface.
What is surface?Surface is the outermost layer of an object or substance. It can refer to the external layer of a solid, liquid, or gas, or the top layer of a material such as soil, snow, or ice. Surface can also be used to describe the appearance or texture of an object, such as a smooth or rough surface. In physics, surface is the boundary between two distinct regions, such as the boundary between air and the Earth's surface.
A particle leaving the asteroid's surface with a radial speed of 1000 m/s will travel farther away from the surface of the asteroid depending on the gravitational force exerted on it. With a given speed, the particle will travel farther away from the asteroid's surface the less gravitational force is present. If the gravitational force is negligible, the particle will travel indefinitely away from the asteroid's surface.
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what instrument would you use to measure the mass of an object
To measure the mass of object, we would use balances or scales. They are generally used to weigh most objects.
What is mass of object?A mass of object is a measure of a matter in an object. A mass of object is unchanged, it always the same wherever it is. The System International unit of mass is kg.
An object can be measured by the following instruments.
Balances and scalesMeasurement transducerSpace Linear Acceleration Mass Measurement Device (SLAMMD)Vibrating Tube Mass SensorGravitational InteractionThe instruments that are mostly used is balances and scales. There are many types of balances and scales. Some types of balances are beam balance, spring balance, physical balance, and digital scientific balance. While, the types of scales are spring scale and digital scale.
Thus, we can conclude that we would use balances or scales to measure the mass of most objects.
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What is the acceleration at the top of a jump?
The acceleration at the top of a jump is the net force acting on the object divided by its mass, and it depends on the specific circumstances of the jump and the forces acting on the object.
The acceleration at the top of a jump depends on the specific circumstances of the jump and the forces acting on the object jumping. In general, the acceleration at the top of a jump is the net force acting on the object divided by its mass. In the case of a vertical jump, such as when a person jumps upward from a standing position, the net force acting on the object is the force of gravity pulling it downward, minus the force of the ground pushing upward (known as the normal force). At the top of the jump, the velocity of the object is momentarily zero, as it changes direction from upward to downward motion, and the net force is solely due to gravity. Therefore, the acceleration at the top of the jump is equal to the acceleration due to gravity (g), which is approximately 9.8 m/s^2 or 1 g. In other cases of jumping, such as a long jump or a high jump, the net force may include other forces such as air resistance, friction, and the force of the athlete pushing off the ground. In these cases, the acceleration at the top of the jump would be different from the acceleration due to gravity alone, and would depend on the specific circumstances of the jump. It's worth noting that some objects that jump, like a flea or a grasshopper, can generate an additional force to help them jump higher and that can affect the acceleration at the top of the jump as well.
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Blocks A and B oscillate at the ends of identical springs. The period of B’s oscillation is twice as long as that of A’s. How many times more massive is block B than block A?
The period of oscillation is the time it takes for an object to complete one full oscillation, and it is inversely proportional to the square root of the spring constant and directly proportional to the square root of the mass of the object. The period of oscillation is given by the formula T = 2π √(m/k) where T is the period, m is the mass of the object, and k is the spring constant.
Let's assume that the period of A's oscillation is T1 and the period of B's oscillation is T2. From the problem statement, we know that T2 = 2T1. Using the formula for the period of oscillation, we can write:
T2 = 2π √(m2/k) = 2 * 2π √(m1/k) = 2T1 = 2π √(m1/k)
Dividing the equation T2 = 2T1 by T1, we get T2/T1 = 2
So m2/m1 = (k*(T2/T1)^2) = (k*2^2) = 4k
Therefore, block B is 4 times more massive than block A.
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an embedded deicing unit of the resistance type shall not exceed ? of heated area.
According to the National Electric Code (NEC) section 426.20(A), an embedded deicing unit of the resistance type shall not exceed 120 watts/ft2 of the heated area.
This limits the amount of power that an embedded deicing unit of the resistance type can use to melt snow and ice on a surface. This ensures that the unit does not overheat or create a fire hazard.
It's important to note that this limit applies to the total power used by the embedded deicing unit and not just the heating element. Other factors like the type of material, the environment, and the design can also affect the performance and safety of the deicing unit.
It's recommended to consult with local code officials or a licensed professional to determine the specific requirements and limitations that apply to your project.
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A gas expands from 15 L to 39 L. In the process it performs 1. 8 kJ of work. For which
type of change can the initial and final pressure of the gas be calculated?
A. Isochoric process
B. Isothermal process
C. Isobaric process
A gas expands from 15 L (initial volume) to 39 L. In the process, it performs 1. 8 kJ of work, an Isothermal process. Using Boyle's law we can determine the pressure of the gas.
The gas's initial volume, V1, is 15 L.
The gas's initial volume, V2, is 39 L.
W = 1.8 kJ is the amount of work it generates.
Using Boyle's law, which is based on an isothermal process, it is possible to determine the gas' initial and ultimate pressures for the aforementioned change as follows;
P₁·V₁ = P₂·V₂
P ∝ 1/T
Since the temperature is maintained constant during the isothermal process, there is zero temperature change when work is performed on the system. Temperature affects the system's internal energy.
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a) is the buoyant force a conservative force? (b) is a tial energy associated with the buoyant force? (c) your answers to parts (a) and (b).
The buoyant force is a non-conservative force, which means that it does not obey the law of conservation of energy. This means that the energy associated with the buoyant force is not stored and can be dissipated by doing work, such as when a submerged object is pushed upward by the buoyant force. As such, there is no potential energy associated with the buoyant force, and thus the answer to part (b) is no.
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an arrow is shot straight up in the air at an initial speed of 14.5 m/s. after how much time is the arrow moving downward at a speed of 8.35 m/s?
The time taken by the arrow to reach the final velocity of 8.35 m/s is 0.51 seconds
The initial velocity of the arrow = 14.5 m/s
The final velocity of the arrow = 8.35 m/s
The time taken by the arrow to reach the final velocity can be found using the formula,
v = u + at
where v is the final velocity
u is the initial velocity
a is the acceleration due to gravity
t is the time taken by the arrow
Let us rearrange the above equation,
t = (v - u) / a
= (8.5 - 14.5) / 9.8
= -5 / 9.8
= 0.51 seconds
Therefore, the time taken by the arrow is 0.51 seconds
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A 5. 0kg box is at rest on a table. The static friction coefficient μs between the box and table is 0. 50, and the kinetic friction coefficient μk is 0. 30. Then, a 30N horizontal force is applied to the box. What is the best estimate of the magnitude of the box's acceleration?
The acceleration of the box is best calculated to be equal to 3.06m/s²
How can I calculate the acceleration of the box?We would first compute the magnitude of the kinetic frictional force in order to determine the size of the acceleration of this box.
The following equation can be used to determine the kinetic frictional force acting on a physical body mathematically:
F = μkN = μk(mg)
F = 0.30 × 5.0 × 9.81
F = 14.7Newton.
Newton's second law of motion is used to calculate the net force, which is as follows:
∑Fx = Applied force - kinetic frictional force = ma
Acceleration, a = [Applied force - kinetic frictional force]/m
Acceleration, a = [30 - 14.7]/5
Acceleration, a = 15.3/5
Acceleration, a = 3.06m/s²
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Calculate:
a) Frequency of the wave produced
b) wavelength of the wave produced
c) The amplitude of a wave is now doubled.What is the value in meters, of the new amplitude of the wave
As the frequency decreases, the wavelength gets longer.
What happens if you double the amplitude of a wave?The amplitude of a wave determines its loudness. The loudness increases as the amplitude increases. The amplitude of a sound is exactly proportional to its loudness. When the amplitude is twice, the loudness is multiplied by four. If the wavelength and speed of a wave are known, they may be used to calculate the frequency using the equation f=v f = v, where is the wavelength in meters and v is the speed of the wave in meters per second. This also provides the wave's frequency in Hertz.
The height of a wave is measured from the highest point on the wave (peak or crest) to the lowest point on the wave.
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Relative cooling rates of igneous intrusive o ms can be estimated by comparing rocks
answere : Crystal sizes
Relative cooling rates of igneous intrusive can be estimated by comparing rocks Crystal sizes.
The size of the crystals within an igneous rock is a sign of the conditions that led to its formation. An igneous rock with large crystals typically indicates that the rock formed deep within the Earth because it is frequently warmer there than close to the surface. They are known as intrusive rocks and exhibit phaneritic textures, which derive from the Greek word phanerous, which means visible. Similar to this, a rock with tiny crystals likely originated at the surface or not far from it and cooled swiftly. These rocks have an aphanitic texture, which comes from the Greek words "a-" for not and "phanerous." They are referred to as extrusive rocks. Additionally, some magmas cool so quickly that no crystals form; in these cases, we refer to the magmas as having a hyaline texture (from the Greek "hyalis," which means glass).
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part of mirren’s role as operations manager is to make sure the company isn’t wasting energy or creating excessive pollution in their operations.
As an operations manager, Mirren plays a crucial role in ensuring that the company's operations are efficient, sustainable, and compliant with environmental regulations.
An operations manager is responsible for the day-to-day management and coordination of a company's operations. This includes overseeing the production and distribution of goods and services, as well as managing the resources needed to support these operations.
In this context, part of Mirren's role as operations manager is to ensure that the company is using energy and other resources in an efficient and sustainable manner. This may include implementing energy-saving measures such as using energy-efficient equipment or implementing energy management systems. It could also involve monitoring and controlling the company's emissions and waste to ensure that they are within legal limits and do not have a negative impact on the environment.
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the three different gas-law processes described in this video are
Constant volume, constant pressure, and constant temperature are the three gas-law processes described in this video.
gas law, which links a gas's pressure, volume, and temperature. Robert Boyle's law says that, under constant temperature, a gas's pressure P varies inversely with its volume V, or PV = k, where k is a constant. The volume V of a gas is precisely proportional to its absolute (Kelvin) temperature T at constant pressure, or V/T = k, according to Charles's law, which bears the name of J.-A.-C. Charles (1746-1823). These two equations can be combined to create the ideal gas law, a single generalization of the behaviour of gases known as an equation of state, PV = nRT, where n is the number of gram-moles of gas and R is known as the universal gas constant.
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at midnight it is sometimes possible to observe the crescent moon on the meridian. group of answer choices true false
At midnight it is sometimes possible to observe the crescent moon on the meridian. This statement is false.
The crescent moon is defined as the small portion of the illuminated (by sunlight) side of the Moon that is facing the Earth. That part of the disk is illuminated not by sunlight, but because of the earthshine. Earthshine refers to the sunlight reflecting off the Earth, then to the Moon, and finally back to the Earth.
The Last Quarter of the Moon rises at the midnight. The Last Quarter Moon usually rises above the eastern horizon which is close to the midnight and it can be seen against a starry night sky until the sun rises. The Last Quarter Moon can also be seen in the daytime sky till it passes below the western horizon in the middle of the day.
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What is the volume of different objects around your house? Nearly everything sold, from juice to dish soap has the volume identified on the packaging. The volume of three objects is given in liters. Convert liters (L) to the other units as indicated below. Show your work!
Object 1:
• What is it? Can of Soda
• Volume in liters (L) = 0.35 L
• Volume in milliliters (ml) =
• Volume in kiloliters (kl) =
Object 2:
• What is it? Gallon of milk
• Volume in liters (L) = 3,8 L
• Volume in milliliters (ml) =
• Volume in Kiloliters (KI) =
Object 3:
• What is it? Bottle of shampoo
• Volume in liters (L) = 0,5 L
• Volume in milliliters (ml) =
• Volume in kiloliters (kl)
To converts liters to mililiters we need to multiply by 1000 and to convert to Kiloliter we need to divide by 1000.
What is conversion ?Unit conversion is the process of converting the measurement of a given amount between various units, often by multiplicative conversion factors that alter the value of the measured quantity without altering its effects.
To create a unit conversion issue where one (or more) units cancel out until just the desired unit is left, follow these steps:
Find out what kind of unit you have.Determine the desired unit.Choose the proper unit conversion factor(s).unit cancellation and math computations (e.g., multiply, divide).The fundamental rule is to multiply when converting from a bigger unit to a smaller unit. Divide if you need to go from a smaller to a larger unit. You will reduce the number, and you are already aware that division is all about reducing numbers.
Object 1
Volume in liters(l) = .35 L
Volume in Mililiters (ml) = .35 * 1000 = 350 ml
Volume in Kiloliters (kl) = 0.35/1000 = 3.5 * 10⁻⁴ kl
Object 2
Volume in liters(l) = 3.8 L
Volume in Mililiters (ml) = 3.8 * 1000 = 3800 ml
Volume in Kiloliters (kl) = 3.8/1000 = 3.8 * 10⁻³ kl
Object 3
Volume in liters(l) = 0.5 L
Volume in Mililiters (ml) = .5 * 1000 = 500 ml
Volume in Kiloliters (kl) = 0.5/1000 = 5 * 10⁻⁴ kl
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Abed uses a force of 1 newton to slide a salt shaker 1 metre across a table. How many newton metres of work has he done?.
Abed uses a force of 1 newton to slide a salt shaker 1 meter across a table, so the work done here is 1 joule.
A newton is the SI unit of force. A joule is the SI unit of energy. Force multiplied by the displacement of the object by the impact of the force gives energy. So,
Energy =Force×Displacement . So if the force exerted is 1 newton and the displacement is 1 meter then the amount of energy wasted is 1 joule of energy. W=F×D, W=1N×1m=1 Joule. Hence work done is 1 joule.
The work-energy concept says that work is completed when there is a transfer of energy.
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If a wave is moving at 300 m/s with a frequency of 55 Hz, find the wavelength
Which of these objects scatters light waves in different directions?
a mirror
a piece of paper
Answer:
a
Explanation:
light ray reflect off the mirror
1. In 1638 the Italian scientist Galileo Galilei
and his assistant conducts an experiment to
measuring the speed of light. They settled down
in the hills, a few kilometers apart
the other. The assistant opened his headlight window
and, when Galileo observed his light, he opened
the window of his lantern.
a) The speed of light is 300,000 km/s.
The distance between the two hills is 3 km.
Choose the time you would mark in this
experiment and circle it.
10 seconds
1 second
1/1000 of a second
1/100,000 of a second
b) Can you tell this time with your eyes?
Explain your answer.
c) How far apart must the two observers be to distinguish the time of 1 second?
a pebble is dropped from rest from the top of a tall cliff and falls 94.9 m after 4.4 s has elapsed. how much farther does it drop in the next 8.8 s?
The pebble drops 758.9 m in the next 8.8 s. The result is obtained by using the equation in uniformly accelerated motion.
What are the equation in uniformly accelerated motion?The equations apply in uniformly accelerated motion in vertical dimension are
v₁ = v₀ + gt
v₁² = v₀² + 2gh
h = v₀t + ½ gt²
Where
v₀ = initial velocityv₁ = final velocityg = acceleration due to gravityt = timeh = height of objectA pebble is dropped from rest from the top of a tall cliff. It falls 94.9 m after 4.4 s and is still falling for 8.8 s. Find how much farther it drops!
See the illustration picture for a pebble dropping in the attachment!
We use g = 9.8 m/s².
The total time is 4.4 + 8.8 = 13.2 s.
The initial velocity of the pebble dropping is 0. So, v₀ = 0.
Using one of the above equations, we get the height.
h = v₀t + ½ gt²
h = 0 + ½ (9.8)(13.2)²
h = ½ (9.8)(13.2)²
h = 853,8 m
The next 8.8 s, the pebble will fall
h₁ = h - 94.9
h₁ = 853.8 - 94.9
h₁ = 758.9 m
Hence, in the next 8.8 s, the pebble will drop 758.9 m.
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