States of Matter
Practice Test
1.
A 75-kg person pushes a 12-kg person in a swing with a force of 3 N. What is the acceleration of the person doing the pushing?
a.
0.4 m/s
2
b.
0.25 m/s
2
c.
0.04 m/s
2
d.
25 m/s
2
Hint
2.
Heat is transferred by __________ when objects touch.
a.
radiation
b.
thermoduction
c.
conduction
d.
convection
Hint
3.
What causes air pressure?
a.
air particles flow through an object
b.
air particles hit an object
c.
air particles vaporize
d.
air particles suck away from an object
Hint
4.
To rise in water, a fish uses its air bladder to __________.
a.
increase air pressure
b.
increase water pressure
c.
displace less water
d.
displace more water
Hint
5.
Why is it important to take thermal expansion into account when building bridges?
a.
so the bridge materials expand and contract with the changes in weather
b.
so the bridge materials don't deteriorate
c.
so the bridge materials can change state as the weather changes
d.
so the bridge will not move at all
Hint
6.
When disorder increases, entropy __________.
a.
fluctuates
b.
increases
c.
reaches zero
d.
decreases
Hint
7.
When there is no relative motion between two surfaces, the force exerted by one surface on the other is called __________.
a.
kinetic friction
b.
resistance
c.
the kinetic force
d.
the static friction force
Hint
8.
Thermodynamics is the study of __________.
a.
light
b.
stars
c.
sound
d.
heat
Hint
9.
If in Figure 5-13 the skier has mass 45 kg and the slope is at 35°, what is the component of the skier's weight perpendicular to the slope?
a.
it cannot be determined with the given information
b.
440 N
c.
250 N
d.
360 N
Hint
10.
As water cools below 4°C, what happens?
a.
it expands
b.
it changes to an amorphous solid
c.
it melts
d.
it contracts
Hint
11.
Which of the following represents the Angle of Resultant Vector?
a.
cos
θ
=
R
y
/
R
x
b.
tan
θ
=
R
x
/
R
y
c.
tan
θ
=
R
y
/
R
x
d.
cos
θ
=
R
x
/
R
y
Hint
12.
Which example demonstrates elasticity?
a.
a bent iron bar
b.
a snapping rubber band
c.
a broken stick
d.
a melted stick of butter
Hint
13.
Surface tension is a result of __________ in a fluid.
a.
kinetic forces
b.
nuclear forces
c.
adhesive forces
d.
cohesive forces
Hint
14.
A sled of mass 40.0 kg is pulled along flat, snow-covered ground. The static friction coefficient is 0.28, and the kinetic friction coefficient is 0.08. What force is needed to keep the sled moving at a constant velocity?
a.
31 N
b.
3900 N
c.
310 N
d.
3.2 N
Hint
15.
__________ states that any change in pressure applied to any point on a confined fluid is transmitted undiminished throughout the fluid.
a.
Galileo's law
b.
Boyle's law
c.
Dalton's law
d.
Pascal's principle
Hint
16.
If in Figure 5-13 the skier has mass 45 kg and the slope is at 35°, what is the component of the skier's weight parallel to the slope?
a.
250 N
b.
440 N
c.
it cannot be determined with the given information
d.
360 N
Hint
17.
A particle is moving so fast in a liquid that it escapes the liquid's cohesive force. This is an example of __________.
a.
sublimation
b.
melting
c.
evaporation
d.
condensation
Hint
18.
Friction that you feel when you rub your hands together was changed from __________ to heat.
a.
sound energy
b.
thermal energy
c.
kinetic energy
d.
nuclear energy
Hint
19.
Newton's third law of motion states that __________.
a.
all forces come in pairs
b.
objects remain either at rest or continue moving in a straight line with constant speed only if the net force on that object is zero
c.
the acceleration of an object is proportional to the net force exerted on the object
d.
a force is needed to keep an object moving
Hint
20.
The process of breaking a vector into its components is called __________.
a.
vector resolution
b.
graphical representation
c.
reduction
d.
trigonometry
Hint
