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21 Cards in this Set
- Front
- Back
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What is energy?
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The ability to do work or cause a change
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What are the 2 main types of energy?
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kinetic and potential
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Whats kinetic energy formula?
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1/2 Mass x Velocity^2
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What is the Kinetic Energy (in Joules) of an object with a mass of 10 kg and a velocity of 10 m/s?
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500 J
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What are the 2 types of potential energy?
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Elastic and gravitational
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What is the potential energy of a rock that weighs 100 N that is sitting on top of a hill 300 m high?
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30,000 J
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Whats the formula for gravitational potential energy?
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weight x height
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What are the 6 different forms of energy?
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Mechanical
Thermal Energy Chemical Energy Electrical Energy Electromagnetic Energy Nuclear Energy |
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What is mechanical energy associated with?
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the motion (kinetic) or position of an object (potential)
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What is thermal energy associated with?
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the total energy of the particles (atoms and molecules) in an object
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What happens when the thermal energy is increased?
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The particles increase in speed and the thermal energy (temperature) of the object increases
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What is chemical energy?
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the energy stored in chemical bonds
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What is electrical energy?
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moving electrical charges
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Name the electromagnetic spectrum from left to right including friequency and wavelength.
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Radio, Microwaves, Infrared, Visible, UV X-Ray, Gamma Ray
Low frequency-High Long wavelength-Short |
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What is nuclear energy associated with?
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The fusion or fission of nuclear atoms
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Whats the Law of the Conservation of Energy?
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energy cannot be created or destroyed, it simply changes from one form into another
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What does E=MC^2 stand for?
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E = the energy produced
m = the mass being converted c = the speed of light (186,000 miles/second) |
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What is power?
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The rate at which work is done
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Formula for power? Unit?
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Work/time
Watt (1 J/ 1 Second) |
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How much power is used if a force of 35 N is used to push a box a distance of 10 m in 5 sec.?
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70 Watts
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How much work is done using a 60-Watt light bulb for 1 hr?
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216,000 J
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