When the reflection of an object is seen in a plane mirror, the image is
a. real and upright.
b. real and inverted.
c. virtual and upright.
d. virtual and inverted.
c
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During an isothermal process, 5.0 J of heat is removed from an ideal gas. What is the work done in the process?
A. zero B. -5.0 J C. +5.0 J D. none of the above
Special relativity tells us that
A) the speed of light is variable. B) light moves faster if emitted by a source moving in the direction of emission. C) light moves faster if emitted by a source moving in the direction of emission and light moves slower if emitted by a source moving in the direction opposite the emission. D) light moves slower if emitted by a source moving in the direction opposite the emission. E) light moves at the same speed independent of the motion of the source.
A 1.0 kg mass is connected to a spring with a spring constant of 9.00 N/m. If the initial velocity is 0.0 cm/s and the initial displacement is 2.0 cm, then what is the maximum kinetic energy of the simple harmonic motion?
A. 0.014 J B. 0.0090 J C. 0.0075 J D. 0.0018 J E. 0.0012 J
A 20-mF capacitor charged to 2.0 kV and a 40-mF capacitor charged to 3.0 kV are connected to each other, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 20-mF capacitor after the two are so connected?
a. 53 mC b. 27 mC c. 40 mC d. 80 mC e. 39 mC