Share Chapter 15: Energy - Review and Practice
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The energy of a moving object is what type of energy?
kinetic
If the speed of an object doubles, it's kinetic energy ______.
quadruples
An example of an object having elastic potential energy is _______.
a stretched spring
An example of electromagnetic energy is ______
sunlight
Energy stored in bonds between atoms is what type of energy?
chemical
Mechanical energy is _________.
the sum of the kinetic and potential energy of an object
An example of conversion of gravitational potential energy into kinetic energy is ____.
a falling raindrop
The law of conservation of energy states that _______.
energy cannot be created or destroyed
Electromagnetic waves _____.
can travel through empty space
The electromagnetic waves with the highest frequency are _____.
gamma rays
The full range of frequencies of electromagnetic radiation is called _____.
electromagnetic spectrum
The visible light spectrum ranges between ________.
infrared and ultraviolet
Infrared rays have shorter wavelength than ______.
radio waves
What is the unit for ENERGY called?
Joule = (N • m ) = (kg•m/s² •m)
A small 30 kg canoe is floating downriver at a speed of 2 m/s. What is the canoe's kinetic energy?
KE = ½mv² = 60 J
A 12 kg sled is moving at a speed of 3.0 m/s. At which speed will the sled have about twice as much kinetic energy?
4.2 m/s
