Which wave causes the medium to vibrate only in a direction parallel to the wave's motion?
a longitudinal wave
200
The slope of a speed-time graph indicates...
acceleration
200
1 N = .....
1 kg x m/s2
200
Work is the transfer of....
energy
200
What does a calorimeter directly measure?
change in temperature
200
A sound wave is an example of a ...
longitudinal wave
300
What is instantaneous acceleration?
how fast a velocity is changing at a specific instant
300
When opposite poles of two magnets are brought together, the poles...
attract each other
300
The mechanical energy of an object equals...
kinetic energy plus its potential energy
300
Heat is the transfer of thermal energy from one object to another because of a difference in...
temperature
300
To find amplitude, measure...
From trough to rest position or from crest to rest position
400
An object is moving at 30m/s takes 5 s to come to a stop. What is the objects acceleration?
-6m/s2
400
What happens when an unbalanced force acts on an object?
the object accelerates
400
Why is the gravitational potential energy of an object 1 meter above the moon's surface less than its potential energy 1 meter above Earth's surface?
The object's acceleration due to gravity is less on the moon
400
The second law of thermodynamics state that thermal energy can flow from colder to hotter objects...
only if work is done on the system
400
Which part of the ear amplifies the vibrations from sound waves?
middle ear
500
A distance-time graph indicates that an object moves 100 m in 4 s and then remains at rest for 6 s. What is the average speed of the object?
10 m/s
500
Give an example of a scenario in which action and reaction forces are involved.
...
500
Nuclear power plants are designed to convert nuclear energy into what type of energy?
electrical
500
The specific heat of copper is 0.385 J/g x C. Which equation would you use to calculate the amount of heat needed to raise the temperature of 0.75 g of copper from 7 C to 29 C?
Q = 0.75 g x 0.385 J/g x C x 22 C
500
What is one property of a wave that determines how much it will diffract when it encounters an obstacle?