Physics Pre-test
This is the Physics Pre-test.
- 1.100mL is equal to
- A.
1kL
- B.
10-6 µL
- C.
0.1 L
- D.
0.01 ML
- 2.The linear momentum of a particle is the product of its mass and its velocity. Consequently, the SI units of linear momentum
- A.
Kg/ (m/s)
- B.
Kg · m · s
- C.
kg · m/s
- D.
None of these
- 3.Newtow’s law of gravitation is an inverse-square law. When separated by a distance d, two unlike charges exert mutual attractive forces of magnitude F on each other. If the separation distance between these charges are doubled, how strong are the mutual forces now?
- A.
F/4
- B.
F/2
- C.
2F
- D.
4F
- 4.An astronaut weighs 80N on earth where the acceleration due to gravity is approximately 10 m/s2. The mass of the astronaut at a point in space where the acceleration due to gravity is 4 m/s2 is roughly
- A.
80 kg
- B.
32 kg
- C.
20 kg
- D.
8 kg
- 5.Copper is a better conductor than paper. Relative to the resistance of a sample of copper, the resistance of an identically shaped sample of paper is
- A.
Larger
- B.
The same
- C.
Smaller
- D.
None of these
- 6.If an object has a constant velocity, then it:
- A.
Moves with unchanging speed in a straight line.
- B.
Moves with unchanging speed along a circle.
- C.
Does not move at all.
- D.
Either A or C.
- 7.The SI prefix ‘milli’ means
- A.
10^-6
- B.
10^+3
- C.
10^-3
- D.
10^+6
- 8.Which of the following is not an SI base quantity?
- A.
Length
- B.
Mass
- C.
Weight
- D.
Time
- 9.The unit of mass in the SI system
- A.
Pound
- B.
Gram
- C.
Kilogram
- D.
None of these
- 10.The metric prefix for 1/1000
- A.
Centi
- B.
Kilo
- C.
Micro
- D.
None of these
- 11.One milliliter is equal to one
- A.
Cubic decimeter
- B.
Cubic centimeter
- C.
Cubic meter
- D.
None of these
- 12.In terms of fundamental SI units, one newton is
- A.
1 kg · m^2/s^2
- B.
1 kg · m^2/s
- C.
1 kg · m/s^2
- D.
None of these
- 13.Two charged particles attract each other with a force of 1.0 N. If the magnitude of each charge is doubled and the distance between them is unchanged, the force will be
- A.
4.0 N
- B.
0.5 N
- C.
1.0 N
- D.
0.25 N
- 14.Which of the following bodies has the largest kinetic energy?
- A.
Mass 2M with speed 3V
- B.
Mass 3M with speed 2V
- C.
Mass M with speed 4V
- D.
Mass 3M with speed V
- 15.When an object thrown vertically upwards reaches its maximum height, it has
- A.
Zero acceleration and zero velocity
- B.
Zero acceleration and negative velocity
- C.
Negative acceleration and zero velocity
- D.
Negative acceleration and negative velocity
- 16.A battery of 3.0 V is placed across a wire of a 5.0 W lamp. The resulting current in the wire is
- A.
0.60 A
- B.
15 A
- C.
60 A
- D.
125 A
- 17.An object attached to one end of a spring makes 20 vibrations in 10 seconds. The period of the object is
- A.
2 Hz
- B.
2 seconds
- C.
0.5 seconds
- D.
0.5 Hz
- 18.How many nanometers are there in one meter?
- A.
10^-9
- B.
10^+3
- C.
10^-3
- D.
10^+9
- 19.A kilowatt-hour is a unit of:
- A.
Time
- B.
Power
- C.
Energy
- D.
Voltage
- 20.Which of the following has three significant figures?
- A.
305.0 cm
- B.
1.00081 kg
- C.
0.0500 mm
- D.
8.060 x 1011 m^2
- 21.An apple falls from a tree. Compare its kinetic energy, K, to its potential energy, U.
- A.
K decreases and U decreases
- B.
K is constant and U increases
- C.
K increases and U decreases
- D.
K increases and U is constant
- 22.The resistance of an object to changes in motion
- A.
Acceleration
- B.
Density
- C.
Inertia
- D.
None of these
- 23.The amount of space an object takes up
- A.
Density
- B.
Speed
- C.
Mass
- D.
None of these
- 24.Distance traveled in a period of time
- A.
Motion
- B.
Acceleration
- C.
Speed
- D.
None of these
- 25.W hich of these is the independent variable in a distance-time graph
- A.
Time
- B.
Distance
- C.
Speed
- D.
None of these
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