Energy, Motion, Force and Work
Name the three forms of energy.
Light, sound, electricity
motion
An instrument used to measure temperature.
Thermometer
The amount of energy per kilogram needed to increase the temperature of a material by 1 K
Specific Heat
What are properties of a Mechanical Wave?
Amplitude, wavelength, frequency, speed
Energy cannot be created or destroyed.
Law of conservation of energy
Stretching a rubber band is an example of increasing an object's what?
Potential Energy
The total energy of all particles in an object.
Thermal Energy
Air currents transfer energy by the method of heat transfer.
Convection
What happens to a sound waves energy as it is absorbed by an object?
The change of energy from one form to another.
Energy transformation
Chemical energy is a form of
Potential energy
Energy that is transferred from a warmer object to a cooler object.
Heat
When energy transforms from one form to another, the total amount of energy in the system __.
Is conserved.
The bending of waves that occurs due to changes in speed.
Refraction
The movement of energy from one object to another.
Energy transfer
In the process of fusion, nuclear energy is released when __ join.
Nuclei
When the kinetic energy of the particles in an object increases, the temperature of the object
Increases
How can heat be transferred across empty space?
Radiation
What happens to a a waves energy if the amplitude or frequency increases?
The energy also increases.
An increase in the movement of particles in a substance is associated with an increase in
Thermal or kinetic energy
Sherpas are natives of Nepal, and they carry heavy loads of equipment up the mountains for the climbers. Suppose one Sherpa uses a force of 980 N to move a load of equipment to a height of 20 meters in 25 seconds. How much power was used?
Power= Force x distance/time
784 J/s
A 2-ounce apple and a 4-ounce apple are at the same temperature. Which requires more thermal energy to raise the temperature by 1 degree Fahrenheit?
The 4-ounce apple (it contains more matter)
The speeds of two bumper cars decrease as their bumpers rub against each other. What happens to the temperature of the bumpers due to the force of friction?
Both bumpers warm up.
What is the wave speed of a sound wave with an F-sharp frequency of 370 Hz and a wavelength of 0.93 m.
Wave speed = Wavelength x Frequency
344.1 m/s