The energy of motion is calledA. kinetic energy.
B. potential energy.
C. thermal energy.
D. work.
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Friction converts kinetic energy into heat, and so it represents a net loss of mechanical energy. When surfaces in contact move relative to each other, the friction between the two surfaces converts kinetic energy into heat. As demonstrated by the use of friction created by rubbing pieces of wood together to start a fire, kinetic energy is converted to heat whenever motion with friction occurs. The friction produced by brake pads in a car must generate a quantity of heat equal to the kinetic energy of the car and as a result, the brakes get quite hot.
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Vectors are quantities that are fully described by both a magnitude and a direction.
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you have to turn your eyes from the sun in order to see the moon.)
-- How long it has been since the last New Moon.
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You don't need it to solve the problem. The answer would be the same
if the blow drier were operating from a 440-V outlet, or any other kind
(just as long as the blow drier is designed to operate on whatever voltage
it was plugged into.)
Power = 750-W = 0.75 kW
Time = 13 minutes = 13/60 of an hour
Energy = (power) x (time) = (0.75 kW) x (13/60 of an hour) = 0.1625 kWh
Cost per unit of energy = $ 0.1 per kWh
Total cost = (energy) x (cost per unit of energy)
Total cost = (0.1625 kWh) x ($ 0.1 per kWh) = $ 0.01625 = 1.625 cents
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The other answer has his significant figures correct, but shows what happens
when you don't carry your units all the way through.
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When the cart arrives at any place that's 1.0 meter higher than where it started, its potential energy will be
(9.8) · (its mass on kilograms) Joules .
Final answer:
Potential Energy is given by the formula mass x gravity x height. The starting height is irrelevant in its calculation. The potential energy depends on the mass of the object, gravity and the elevated height.
Explanation:
The potential energy of an object is calculated by the formula Potential Energy = mass x gravity x height. Whenever the height of an object increases, its potential energy will increase as well provided mass and the gravitational field (g) remain constant. Here, the starting height being 0.0 m is irrelevant to the calculation of potential energy at 1.0 m height. If the mass of the cart and the value of gravity (usually taken as 9.8 m/s2 on Earth's surface) are known, you can substitute those values into the formula to find the potential energy.
e.g. If the mass of the cart was 2 kg, the potential energy at a height of 1.0 m would be 2 kg x 9.8 m/s
2
x 1.0 m = 19.6 joules.
Learn more about Potential Energy here:
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second there are just too many possibilities
i hope i helped