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Energy
Test Description: As always....use this to prepare for the exam.
Instructions: Answer all questions to get your test result.
1) An electric blanket transforms electrical energy to
A
thermal energy
B
nuclear energy
C
mechanical energy
D
chemical energy
2) A pendulum set in motion eventually stops because
A
The KINETIC and POTENTIAL energy are balanced
B
the pendulum runs out of power
C
FRICTION transforms the mechanical energy into thermal energy
D
The energy is DESTROYED
3) A girl throws a ball 20m into the air. The ball has the maximum potential energy at the height of
A
15 m
B
6 m
C
20 m
D
0 m
4) Sunlight is a form of
A
electrical energy
B
nuclear energy
C
chemical energy
D
electromagnetic energy
5) A skydiver with a mass of 100 kg jumps out of an airplane at a height of 1600 m. The acceleration due to gravity is 9.8 m/s2. What is the GRAVITATIONAL POTENTIAL ENERGY of the skydiver?
A
160,000 J
B
9800 j
C
15, 680 J
D
160, 000 kJ
6) Kinetic energy depends on
A
height
B
mass and velocity
C
only velocity
D
only mass
7) The sun's energy comes from
A
thermal energy
B
electromagnetic energy
C
chemical energy
D
nuclear energy
8) Potential energy is energy
A
of velocity
B
of distance
C
of motion
D
that is stored
9) The formula WEIGHT X HEIGHT is used to calculate
A
gravitational potential energy
B
kinetic energy
C
elastic potential energy
D
mechanical energy
10) A 4 kg object moving at a speed of 10 m/s has a kinetic energy of
A
4 J
B
100 j
C
200 J
D
8 J
11) A moving object can do work so it has ______________ energy.
A
potential
B
5 hour
C
kinetic
D
chemical
12) ELASTIC POTENTIAL ENERGY is associated with objects that can be
A
length
B
height
C
stretched or compressed
D
burning/combustion
13) The energy an object has due to its motion is called _________________________ energy.
A
chemical
B
thermal
C
potential
D
kinetic
14) Plants transform electromagnetic energy to _________________________ energy.
A
mechanical
B
nuclear
C
chemical
D
thermal
15) The energy stored in fossil fuels is released by ___________________
A
kinetic
B
stretching/compressing
C
burning
D
potential
16) WORK is the transfer of energy
A
false
B
true
17) Potential energy that depends on height is ELASTIC potential energy
A
false
B
true
18) A pendulum has maximum kinetic energy at the TOP of its swing
A
true
B
false
19) The law of conservation of energy states that when one form of energy is transformed to another SOME energy is destroyed
A
true
B
false
20) Power is the rate at which energy is LOST
A
true
B
false
*select an answer for all questions
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