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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Why are seatbelts important in a car? What other precautions can be taken to reduce the impact of an accident?
Answer:
Explanation:
Seatbelts are essential in a car because they serve to hold the vehicle's passengers firmly in their seats during a collision. This reduces the danger of serious injury or death by protecting people from being flung from the vehicle or colliding with hard objects inside the vehicle.
In addition to wearing seatbelts, the following steps can be done to lessen the severity of an accident:
1. Airbags: In modern automobiles, airbags release following a collision to absorb the impact and prevent the occupants from hitting hard objects within the vehicle.
2. Kid safety seats: Children should be properly strapped in a child safety seat that is age and size appropriate.
3. Headrests: Properly positioned headrests can help lessen the risk of whiplash injuries in the event of an accident.
4. Avoiding distractions: One of the primary causes of accidents is distracted driving. Avoiding distractions while driving, such as using a mobile phone, eating, or applying make-up, can assist to lower the chance of an accident.
5. Regular car maintenance, such as regular servicing, tyre pressure checks, and brake checks, may assist to ensure that the vehicle is in excellent condition and lower the danger of an accident.
6. Avoiding aggressive driving: Speeding, tailgating, and making rapid lane changes all raise the chance of an accident.
7. Following traffic rules, such as respecting speed limits, traffic signs, and signals, as well as maintaining a safe distance from other cars, can assist to lessen the likelihood of an accident.
"A bicyclist starts from rest and accelerates along a straight path to a speed of 12.15 m/s in a time of 4.5 seconds. What is the bicyclist’s acceleration in m/s2?A. .37B. 54.7C. 2.7D. 6.8"
The bicyclist's acceleration is 2.7 m/s². Thus, Option C is the answer
Acceleration is defined as rate of change of velocity with time. Its formula is
a= [tex]\frac{vf - vi}{t}[/tex]
acceleration = (final velocity - initial velocity) / time
The bicyclist's acceleration can be found using this equation:
In this case,
final velocity = 12.15 m/s
initial velocity is 0 m/s (since the bicyclist starts from rest)
time = 4.5 s
Plugging these values into the equation, we get:
a =[tex]\frac{12.5 - 0}{4.5}[/tex]
a = 2.7 ms⁻²
Therefore, The correct answer is c. 2.7 m/s²
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When the ball reaches its maximum height Which of the following becomes zero?
When the ball reaches its maximum height, velocity will becomes zero. The velocity of an object can be positive, negative, or zero.
The ball is at the highest point of its trajectory and has momentarily stopped moving upward, but has not yet begun moving downward. The ball is momentarily at rest, thus it has zero velocity at that instant. Velocity is a vector quantity and it represents the rate of change of displacement. At the maximum height, the displacement changes from upward to downward direction. Therefore, the velocity of the ball becomes zero at the maximum height. The velocity of the object at maximum height is zero because the object is at rest at that point. At this point, the net force acting on the object is zero, and the object is not moving in any direction. The object is momentarily at rest, thus it has zero velocity at that instant.
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The top of the syringe is a circle. You need to
compute its area for use in later computations of
pressure values. Start by using a ruler to
measure the diameter. Estimate to the nearest
0. 01 cm. ?cm
The syringe's circle measures 10.17 cm² in size.
Concept • The circle's radius, or r, determines its area, which is equal to twice its diameter, or r.
The region encircled by a circle with radius r is known as r2 in geometry. Here, the Greek letter stands for the constant proportion of a circle's circumference to its diameter, which is roughly equivalent to 3.14159.
Since the base area is known, the volume can be determined by dividing the base area by the height. *Remember that volume is expressed in cubic units.
We must determine the circle's surface area given its diameter, 1.80 cm, and radius.
The formula πr² can be used to get the circle's area.
Change the formula's value for r.
Circle area is equal to r12 3.14 1.80 1.80, or 10.17 cm2.
Consequently, the Circle's area is 10.17 cm².
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Complete Question -
The top of the syringe is a circle. You need to
compute its area for use in later computations of
pressure values. Start by using a ruler to measure
the diameter. Estimate to the nearest 0.01 cm.
3.60
cm
COMPLETE
Divide by two to find the radius. Maintain
significant figures. 1.80
✓ cm
MM
CM
1
2
3
4
5
What happens when you swing a pendulum?
When you swing the pendulum, there will be an exchange of kinetic and potential energy.
A pendulum is an object attached to a string and can swing freely and periodically. When the pendulum is swinging, there will be a constant exchange of energy. The exchange of kinetic energy and gravitational potential energy occurs in every vibration. The mechanical energy involved in this action helps maintain the pendulum's constant period. The time it takes for the pendulum to swing back to its original position is called the pendulum's period. The period of the pendulum depends on the force of gravity and the length of the pendulum.
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A ball of mass 10kg runs up a step of total height 3m .calculate the work done in joule
The correct answer to this question is: work done = 294 Joules
Step-by-step Solution:
There is work done against gravity that is potential energy. It is mathematically given as:
P.E=m*g*h (where g is the acceleration due to gravity, 9.81 m/s)
And m = mass
g = acceleration due to gravity
h = height
P.E=10×9.8×3
P.E= 294 J (J=joules).
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Please Help!
7. How much potential energy is contained in a 52 kg skier at the top of a 150 m ski
slope?
Potential Energy is the energy that an object has stored in relation to its position in space.
What is Potential energy?One sort of potential energy is gravitational potential energy, which is equal to the product of the object's mass (m), the gravitational acceleration (g), and the object's height (h) as measured in relation to the ground's surface (the body).
You may determine the amount of energy that an elevated object has stored in it using a potential energy calculator.
Because it pertains to the energy that an object stores as a result of its vertical position or height, the full term of this effect is gravitational potential energy.
Therefore, Potential Energy is the energy that an object has stored in relation to its position in space.
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Which one is a non-renewable energy resources Mcq?
Answer:
coal
petroleum
and natural gas
When shooting a bow and arrow, when the archer pulls back the string, the bow flexes! Now the flexed bow has.
a. Potential energy
b. Kinetic energy
c. Motion
d. Work
When shooting a bow and arrow, the archer pulls back the string and flexes the bow, storing potential energy.
What is potential energy?Potential energy is the energy stored in an object due to its position or configuration. This type of energy is the stored energy of an object, which can be released and transformed into other forms of energy, such as kinetic energy. Potential energy is associated with forces such as gravity, electrical, and chemical, which can cause a change in an object’s energy state. Examples of potential energy include a stretched bow and arrow, a roller coaster at the top of a hill, and a compressed spring.
This potential energy is then transferred to the arrow in the form of kinetic energy. The arrow is then put in motion by the archer and due to the force of the bowstring, work is done in the form of acceleration. The arrow is then released and the kinetic energy propels it towards the target.
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A good leader will have followers who ______. a. are willing to comply with commands b. must be forced to comply with commands c. use lack of compliance to enforce their will d. are focused on their own goals please select the best answer from the choices provided a b c d
A competent leader will have followers who are ready to do as they are told.so the answers is A.
Who is an effective leader?b. must be forced to comply with commands. This is not a desirable trait for a leader, as it implies that the followers do not trust or respect the leader and must be coerced into following their commands.c. use lack of compliance to enforce their will. This is also not a desirable trait, as it implies that the followers do not respect the leader's authority and may actively resist or undermine their commands.d. are focused on their own goals. This is not an ideal trait for a leader, as it implies that the followers are not aligned with the leader's vision and may not be working towards the same objectives.Therefore, the best answer is a. are willing to comply with commands. A leader with followers who willingly comply with commands is a leader who has been able to gain the trust and respect of their followers, which is an important trait for a leader.To learn more about good leader refer:
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describe the three components of attitude. provide an example of when you may use these three components in your work.
The three components of attitude are affective component, behavioral component, and cognitive component.
Attitude is our evaluation of a person, an idea, or an object. We have attitudes toward many things ranging from products that we might pick up in the supermarket to people around the world to political policies. Typically, attitudes are favorable or unfavorable: positive or negative.
They have three components: an affective component (feelings), a behavioral component (the effect of the attitude on behavior), and a cognitive component (belief and knowledge).
Our attitudes and beliefs are not only influenced by external forces, but also by internal influences that we control. Like our behavior, our attitudes and thoughts are not always changed by situational pressures, but they can be consciously changed by our own free will.
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for a spacecraft going from the earth toward the sun, at what distance from the earth will the gravitational forces due to the sun and the earth cancel?
For a spacecraft going from the earth toward the sun, at no point of distance from the earth will the gravitational forces due to the sun and the earth cancel due to The Sun is being drawn toward the Earth by its gravitational pull.
What is gravitational force?All physical things with mass are drawn to the gravitational force, which can be thought of as an attracting force. Gravitational force is the known natural force that is by far considered the weakest.
The gravitational force is what pulls objects with mass in the same direction. The gravitational attraction of the Earth is something we often think about. Gravity, however, draws all mass-bearing objects in the same direction.
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what someone might say about your knowledge of atoms is
An atom is a unit of matter that specifically characterises a chemical element. One or more negatively charged electrons surround the core nucleus of an atom, which is made up of all of them.
What did you learn about atoms?The fundamental unit of chemistry is the atom. It is the smallest particle that can be separated into matter without releasing electrically charged particles. Additionally, it is the smallest piece of matter with the characteristics of a chemical element.When British chemist John Dalton established that chemicals always have whole number ratios of atoms, he provided the first modern proof that atoms exist. Because of this, it is H2O and not H20.The fundamental building blocks of all the substances on earth are called atoms. Our bodies contain atoms, which combine to create the molecules that make up matter.To learn more about chemical refer to:
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An atom is a unit of matter that specifically characterises a chemical element. One or more negatively charged electrons surround the core nucleus of an atom, which is made up of all of them.
What did you learn about atoms?The fundamental unit of chemistry is the atom. It is the smallest particle that can be separated into matter without releasing electrically charged particles. Additionally, it is the smallest piece of matter with the characteristics of a chemical element.
When British chemist John Dalton established that chemicals always have whole number ratios of atoms, he provided the first modern proof that atoms exist. Because of this, it is H2O and not H20.
The fundamental building blocks of all the substances on earth are called atoms. Our bodies contain atoms, which combine to create the molecules that make up matter.
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if you want to measure the electric potential difference, which cables will you use to connect to a multimeter, and where will you plug them in?
The cable that should be connected to a multimeter in order to measure the electric potential different are two banana cables, the black probe should be plugged into the COM and the red probe into the port marked VΩmA.
The black end of the probe is connected into the COM socket. All meters use this as standard. The red probe lead is plugged into a socket labeled VΩmA, which can be used to measure voltage, resistance, or microamperes. If the socket doesn't say "mA" as described above, there will be one or more separate sockets where the red probe lead can be connected to measure current. The maximum current range for these sockets will be indicated with a "A" or "mA" marking.
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You're in an airplane that flies horizontally with speed 1100 km/h (300 m/s ) when an engine falls off. Neglecting air resistance, assume it takes 27 s for the engine to hit the ground. Find the height. Find the horizontal distance. If the airplane somehow continues to fly as if nothing had happened, what is the distance between the engine and the airplane at the moment the engine hits the ground?
The horizontal distance is R = 8100 m.
What are Newton's first, second, and third laws of motion?
According to the first law, a force must be applied to an object before it may affect its motion. According to the second law, an object experiences a force equal to its mass times its acceleration. According to the third law, when two things interact, they exert forces on one another that are both equal in strength and directed in the opposite direction.
To find the height of the plane from ground :
H = ut + (1/2)gt²
Where
initial velocity ,u = 0 m/s,
t = time = 27 s,
acceleration due to gravity ,g = 10 m/s²
H = 0*(27) + (1/2)*(10)*(27)²
H = 3645 m = 3.6 km
The horizontal distance (R) :
R = ut
R = 300*(27)
R = 8100 m
If d represent the distance from the engine to the air plane at the ground, hence:
d² = 8100² + 3645²
d = 7233 m
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what is the difference between a fast-break and slow-break offensive style?
The fast-break offensive style offers fast movement from one part of the court to another and a chance for scoring. Fast, quick passes down the court and using more players on the offensive than the opposition has on defense are characteristics of the style. The slow break style of play is characterised by slower, more methodical play.
Man-to-man defense and zone defense are the two different defensive alignments used in basketball. Coaches must consider the individual circumstances surrounding their club because the roster set-up may favour one defense over another.
A team tries to advance the ball up court and into scoring position as rapidly as they can during a fast break so that the defense is out numbered and cannot prepare.
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what is the percent uncertainty in your answer? the uncertainty of the force is 10 n and the uncertainty of the acceleration is 0.01 m/s2 .
The uncertainty of the force is 10 N and the uncertainty of the acceleration is 0.01 m/s². The mass of the beam is 250 kg and its uncertainty is 12.5%.
Using the Newton second law of motion:
F = ma
m = F/a
Where:
F = the applied force
m = mass
a = acceleration.
In this problem, the force = 100 N with uncertainly 10 N.
Hence, incorporating its uncertainty, we can write
F = ( 100 ± 10 ) N or in percentage F = 100 ± (10%) N
The acceleration is 0.4 m/s² and its uncertainty is 0.01 m/s²
Hence, we can write:
a = ( 0.4 ± 0.01 ) m/s² or in percentage a = 0.4 ± (2.5% ) m/s²
The mass of the beam can be calculated as:
m = F/a
= 100/0.4 = 250 kg
The rule for the uncertainty in calculated result is: If data are multiplied or divided, the percentage uncertainty of the result is equal to the sum of the individual data uncertainties.
Hence, the uncertainty of the calculated mass (in percentage) is:
10% + 2.5% = 12.5%.
Therefore, we can write the result as:
m = 250 ± (12.5% ) kg
Your question is incomplete. Most likely, it was:
An astronaut exerts a 100 N force pushing a beam into place on the International Space Station. The beam accelerates at 0.40 m/s² . Find the mass of the beam. What is the percent uncertainty in your answer? The uncertainty of the force is 10 N and the uncertainty of the acceleration is 0.01 m/s².
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Please help on all the questions I will post 50 points each
Answer:
The answer is 294 J
Answer:
294 j
Explanation:
PLEASE HELP A BROTHER OUT :(
A book of weight 2.5n rests on a horizontal table top and by means of a pencil a horizontal force of 2n is applied to the book causing it to slide.The force of friction on the sliding book is 1n.
A-draw a diagram of the set up to show the book at rest on the table top and forces acted on the book before the pencil was used.
B-name and give the magnitude of each force acting on the book before the force was applied with the pencil.
C-write a brief explanation for the stae of rest of the book.
D-draw a separate diagram to show the sliding book and the forces acted on it.
E-calculate the velocity of the book when the applied force has been acting on it for 1.5 seconds.
Use gravity=10 (n/kg)
A-
The diagram of the set up shows the book resting on a horizontal table top with the force of gravity acting on it.
B-
The force acting on the book before the force was applied with the pencil is the force of gravity.
The magnitude of the force of gravity is 2.5n (the weight of the book).
C-
The book is at rest due to the force of friction being equal to the force of gravity. The force of friction is opposing the force of gravity, preventing the book from moving.
D-
The diagram shows the sliding book with the force of friction opposing the applied force of 2n and the force of gravity acting on it.
E-
The acceleration of the book can be calculated by the force acting on it divided by the mass of the book.
a = (Fapplied - Ffriction) / m
a = (2 - 1) / 2.5 = 0.4 m/s^2
The velocity of the book can be calculated using the equation:
v = a * t
v = 0.4 * 1.5 = 0.6 m/s
The book will have a velocity of 0.6 m/s when the applied force has been acting on it for 1.5 seconds.
about how much of the solar energy that reaches earth’s atmosphere is absorbed by the atmosphere?
Approximately 70% of the solar energy that reaches Earth's atmosphere is absorbed by the atmosphere.
What proportion of solar energy actually reaches the planet?The Earth receives a continuous solar energy input of 173,000 terawatts (trillions of watts). That is more than 10,000 times what the entire world uses in terms of energy. And that energy is endlessly replenishable, at least as long as the sun exists.
Overall, the atmosphere and the Earth's surface absorb about 70% of incoming radiation, while about 30% is reflected back to space and does not heat the surface. Considering that the Earth is colder than the Sun, it radiates energy at wavelengths that are much longer.
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racing on a flat track, a car taking 5.5 s to round a curve of a radius of 56 m. what is the centripetal acceleration of the car?
The centripetal acceleration of the car is 1.85 m/s²
The speed at which anything moves around a circle is known as its centripetal acceleration. Centripetal acceleration is the acceleration experienced by any object that is travelling in a circle and whose acceleration vector is directed toward the center of the circle.
To find the centripetal acceleration of the car, we can use this following formula:
Centripetal acceleration = v²/r
In this case, we are given that:
The time that car was taking = 5.5 s
The radius of the car (r) = 56 m
The velocity of the car (v) = distance : time = 56 m : 5.5 s = 10.18 m/s
Hence, the centripetal acceleration:
Centripetal acceleration = 10.18² / 56
Centripetal acceleration = 1.85 m/s²
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The melting point range will be narrower than expected. How would having too much sample in the melting point tube most likely affect a melting point measurement
The melting point range will be broader than expected. In this scenario, the melting point tube most likely affect a melting point measurement.
When too much sample is placed in the melting point tube, it can affect the measurement of the melting point in several ways. One of the most likely effects is that the melting point range will be broader than expected. This occurs because the excess sample in the tube will impede the heat transfer to the sample, causing the sample to melt over a wider temperature range. As a result, the temperature at which the sample begins to melt and the temperature at which it is completely melted will be farther apart, resulting in a broader melting point range
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the wheels of a bicycle are 725 mm in diameter. how many revolutions would these wheels make during a 4.55 mile ride?
The number of revolutions that the wheel has to make to travel 4.55 miles is 3214 revolutions.
The number of revolutions made by a circle of radius r to cover a distance s is s= 2 πr. In covering a distance s m, a circular wheel of radius r m makes s2πr revolution.
The diameter of the wheel is 725mm or 0.725 m. The distance the wheel has to go is x=4.55 miles or 7323 m.
The circumference of the wheel is πD where D is the diameter. Therefore the number of revolutions to travel distance X is no. of revolution = X/(πD). So if D = 0.725m and X = 7323m. Then the number of revolutions = 7323/(π x 0.725) = 3213.85 revolutions or 3214 revolutions.
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Alan rents a private jet for the weekend. He flies 400km south, then flies 700km west, then 1200km south. What is the distance? What is the displacement?
Explanation:
the distance is easy. this is just the sum of the distances of the individual trips :
400 + 700 + 1200 = 2300 km
the displacement is trickier. this is the line of sight distance between the starting point of the first trip and the ending point of the last trip.
let's imagine a coordination grid with 1 km as unit size, and the starting point being the origin (0, 0).
so, then the trips subtract 400 units from y, then 700 units from x, and then further 1200 units from y.
so, the coordinates of the end point are (-700, -1600).
the displacement (straight distance from the origin) is then found by using Pythagoras
c² = a² + b² (c being the Hypotenuse, a and b the legs)
via the right-angled triangle of the coordinate differences to the origin :
displacement² = (-700)² + (-1600)² =
= 490000 + 2560000 =
= 3050000
displacement = sqrt(3050000) = 1,746.42492... km
explain the relationship between displacement, velocity, and acceleration. how are total distance and speed related to these concepts?
Velocity is the change of an object displacement over time and acceleration is the change of velocity over time. Total distance is related to speed, which is a scalar quantity of how fast an object is moving.
Velocity is a vector quantity. Velocity means how fast an object is changing its position. As a vector quantity, velocity is direction aware and can be noted as negative or positive value based on its direction. Velocity can be calculated by dividing an object displacement and the time the object moves. Velocity can be formulated as:
Velocity = Displacement : Time
Speed on the other hand, is a scalar quantity. Hence speed pay no attention to the direction of an object's movement. Speed is calculated by dividing an object's total distance over time. Speed only anwer how fast an object is moving.
Distance and displacement might sound as similar things however they are different. Distance is a scalar quantity and represents the area an object covers on its motion. Displacement is a vector quantity and answer an object's overall change in position after its movement. Any changing in direction of an object's movement might be calculated as negative on displacement perspective.
Acceleration refers to the changing of an object's velocity over time. Acceleration can be formulated as:
Acceleation = Δvelocity : Time
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Generates a large volume of solid radioactive waste. fission
Fission generates a large volume of solid radioactive waste.
What is fission? Atoms are torn apart through nuclear fission in order to release the nuclear energy that holds them together. This energy is released as heat and radiation, with a nuclear power plant using the heat to boil water into steam that turns a turbine and powers generators to generate electricity. Nuclear fission produces no carbon emissions since it produces heat using uranium rather than fossil fuels.At a power plant, uranium is placed in enclosed metal cylinders inside a steel reactor vessel to break atoms. Subsequently, neutrons are fired at the uranium atoms, causing them to split and release further neutrons that then strike other atoms, starting a chain reaction that divides more atoms and releases energy.For more information on fission kindly visit to
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Measure the initial force (in Newton) needed to get the brick going, as well as the force needed to keep it going smoothly once it started moving.
The brick has a string tied around it. Which is used to love the brick.
The initial force needed to get the brick going will depend on the weight of the brick and the friction between the brick and the surface it is on. Assuming the brick is made of concrete and weighs 8 kg, and the friction between the brick and the surface is 0.4, the initial force needed to get the brick going would be 32 N.
What is the force ?
Force is a term used to describe any physical action that can cause a change in motion, direction, shape, or energy of an object. It is a fundamental concept in physics, and can be seen in both everyday examples and in more complex phenomena. Examples of everyday forces include the force of gravity, which keeps us on the ground, and the force exerted when pushing or pulling an object. More complex forces, such as the force of magnetism, explain how atoms and particles interact with each other and influence the behavior of larger objects. Ultimately, all forces are the result of interactions between particles, and the behavior of these forces can be studied through the field of physics.
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class 2 cables shall have a minimum voltage rating of ? a. 150 volts
b. 100 volts
c. 200 volts
d. 300 volts
class 2 cables shall have a minimum voltage rating of 150 volts. Hence, option (a) is correct.
What are class 2 power supply?The LPS or Class 2 power supplies are isolated circuits that are fundamentally limited power supply units by definition.
Under any loading scenario, cannot deliver more than 100VA of continuous perceived power.cannot provide significant current in a short circuit situation.has a maximum open-circuit voltage of 42.4V peak AC or 60V DC that is SELV compatible.The National Electric Code (NEC) also makes reference to class 2 power supplies.
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A runner was going at a velocity of 12 m/s but got tired and, after 4 seconds, slowed down to 8 m/s. What is the runners acceleration?
Answer:
-4.0 m/s²
Explanation:
a = Δv/Δt = (8 m/s - 12 m/2) / 4 s = -4.0 m/s²
the negative sign means the runner was slowing down (decelerating)
Small frogs that are good jumpers are capable of remarkable accelerations. One species reaches a takeoff speed of3. 7 m/s in60 ms.
The acceleration of the frog when it started from rest is 61.67 m/s^2.
The frog starts from rest. So, the initial speed is
U=0m/s
And the final velocity is
V= 3.7m/s
And the time taken by the frog to do this is
t=60ms
So, the acceleration of the frog is
a=v-u/t
a= 61.67 m/s^2
Although the ability to plot a graph accurately is important, it is absolutely essential to be able to interpret graphs and to visualise the shape of a graph for a given motion.
For an object that is stationary, the displacement–time, velocity–time and acceleration–time graphs
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