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PS Final Exam II
Test Description: Final Exam
Instructions: Answer all questions to get your test result.
1) A coil of wire that has a soft iron core and that acts as a magnet when an electric current is in the coil is called a(n)
A
ferromagnet
B
temporary magnet
C
electromagnet
D
permanent magnet
2) Air rushes into your lungs when you inhale because
A
a muscle moves upward and decreases the space in your chest
B
the pressure inside the lungs is higher than outside the body
C
fluids flow from areas of high pressure to areas of low pressure
D
it contains oxygen
3) How does a ramp make lifting a heavy object easier?
A
More force is needed to move the object over a longer distance
B
Less force is needed to move the object over a longer distance
C
The object is moved over a shorter distance
D
The ramp increases the amount of work you do
4) Your house is an example of what type of circuit?
A
Magnetic
B
Series
C
Centripetal
D
Parallel
5) Mendeleev arranged the elements by
A
increasing atomic mass
B
appearance
C
melting point
D
density
6) Who first discovered naturally occuring magnetic rock?
A
Chinese
B
Greeks
C
Native Americans
7) When two or more elements join together chemically,
A
a mixture is formed
B
a compound is formed
8) Which part of the atom has a positive charge?
A
positronium
B
neutron
C
electron
D
nucleus
9) When you wind a rubber band on a toy airplane what type of energy does the rubber band have?
A
elastic potential energy
B
kinetic energy
10) If a tennis bal, a solid rubber ball, and a solid steel ball were dropped at the same time from the same height with no air resistance, which would hit the ground first?
A
rubber ball
B
steel ball
C
all at the same time
11) What do you call the energy of motion?
A
potential energy
B
kinetic energy
12) Greg applies a force of 100 N to move a box 5 meters. How much work did he do?
A
500 N
B
500 J
C
5 J
D
100 J
13) A book weighs 6 N. If the acceleration of gravity is 9.8 m/s/s what is the mass of the book in kilograms?
A
6.1 kg
B
59 kg
C
1.6 kg
D
0.61 kg
14) A construction worker is lifting a load of bricks onto a truck. He does 200 J of work in 40 seconds. What is his power output?
A
50 J
B
50 W
C
5 W
D
5 J
15) What is the voltage if the current is 4 A and the resistance is 10 ohms?
A
4 V
B
40 V
C
10 V
D
40 R
16) What is a device that makes work easier by changing the size or direction of the force?
A
machine
B
force
C
power
D
watt
17) What is the SI unit for pressure?
A
drag
B
archimedes
C
pascal
D
bernoulli
18) When a fluid flows from area A to area B, area A is an area of greater
A
pressure
B
volume
C
temperature
D
maws
19) When acids and bases come in contact with each other, they
A
make hydroxide
B
become bitter
C
neutralize each other
D
explode
20) If a spoonful of salt is mixed in a glass of water, what is the water called?
A
solute
B
solvent
*select an answer for all questions
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