-
1)
As a 2.0-kg block travels around a 0.50-m radius circle it has an angular speed of 12 rad/s. The circle is parallel to the xy plane and is centered on the z axis, a distance of 0.75m from the origin. The z component of the angular momentum around the origin is:
- A) 6.0kg · m2/s
- B) 9.0kg · m2/s
- C) 11 kg · m2/s
- D) 14 kg · m2/s
-
2)
A net torque applied to a rigid object always tends to produce:
- A) linear acceleration
- B) rotational equilibrium
- C) angular acceleration
- D) rotational inertia
-
3)
An object attached to one end of a spring makes 20 vibrations in 10 s. Its angular frequency is
- A) 12.6 rad/s
- B) 1.57 rad/s
- C) 2.0 rad/s
- D) 6.3 rad/s
-
4)
In simple harmonic motion, the restoring force must be proportional to the:
- A) amplitude
- B) frequency
- C) velocity
- D) displacement
-
5)
Mercury is a convenient liquid to use in a barometer because
- A) it has a high density
- B) it is a metal
- C) it has a high boiling point
- D) it expands little with temperature
-
6)
The units of the electric field are:
- A) J/m
- B) J/(C·m)
- C) J/C
- D) J·C
-
7)
A farad is the same as a
- A) J/V
- B) V/J
- C) C/V
- D) V/C
-
8)
We desire to make an LC circuit that oscillates at 100 Hz using an inductance of 2.5H. We also need a capacitance of:
- A) 1 F
- B) 1mF
- C) 1 µF
- D) 100 µF
-
9)
The wavelength of red light is 700 nm. Its frequency is ____________________.
- A) 4.30 * 10^3 Hertz
- B) 4.30 * 10^4 Hertz
- C) 4.30 * 10^2 Hertz
- D) 4.30 * 10^5 Hertz
-
10)
Which of the following statements is NOT TRUE about electromagnetic waves?
- A) Electromagnetic waves satisfy the Maswell's Equation
- B) Electromagnetic waves can not travel through space.
- C) The receptions of electromagnetic waves require an antenna.
- D) The electromagnetic radiation from a burning candle is unpolarized.
