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Ch. 17-Review
Test Description: Part 1
Instructions: Answer all questions to get your test result.
1) The work output of a machine divided by the work input is the ________________ of the machine.
A
power
B
resistance
C
effort
D
efficiency
2) The lowest possible temperature is ________________.
A
-273 F
B
-273 K
C
0 K
D
0
3) An inclined plane with one or two sloping sides forms a machine called a
A
ramp
B
lever
C
wedge
D
pulley
4) A fixed, single pulley that is used to lift a block does which one of the following?
A
decreases the force required to lift the block
B
doubles the required to lift the block
C
makes the block easier to lift by changing the direction of the force needed to lift it
D
decreases the force required and changes the direction of the force required
5) A place where molecules are far apart is a _______________________.
A
refraction
B
reflection
C
rarefaction
D
compression
6) The rate at which work is done is calles __________________________.
A
force
B
efficiency
C
power
D
effort time
7) Which one of the following in NOT an example of an electromagnetic wave?
A
red light
B
x-rays
C
gamma rays
D
sound wave
8) A heat engine __________________.
A
changes kinetic energy into thermal energy
B
changes mechanical energy into electrical energy
C
changes thermal energy into mechanical energy
D
changes mechanical energy to thermal energy
9) A machine that changes only the direction of a force has a mechanical advantage of _________.
A
1
B
2
C
10
D
100
10) A slanted surface used to raise an object is a(n) ____________________________.
A
effort ramp
B
inclined plane
C
wedge
D
efficiency board
*select an answer for all questions
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