How far does light travel in 1.0 ?s? (c = 3.0 × 108 m/s)
A) 3.0 × 1014 m
B) 0.30 km
C) 3.0 m
D) 30 cm
B
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A walker walks 30 m from the origin toward the EAST to point A. She then walks from point A 20 m more toward the EAST to point B. The walker's total displacement form the origin is
A. 50 m toward the EAST. B. 30 m toward the WEST. C. 20 m toward the WEST. D. 10 m toward the EAST. E. 10 m toward the WEST.
Kim is in a spaceship moving past you at half the speed of light. Which of the following correctly describes how you will perceive each other's time?
A) You will say that Kim's time is running slow, and she will say that your time is running slow. B) You will say that Kim's time is running slow, and she will say that your time is running fast. C) You will say that Kim's time is running fast, and she will say that your time is running slow. D) You will both agree that time runs at the same rate for both of you.
A gas expands from an initial volume of 0.040 m3 and an initial pressure of 210 kPa to a final volume of 0.065 m3 while its temperature is kept constant. How much work is done by the system?
A) 3.7 kJ B) 4.1 kJ C) 5.3 kJ D) 5.6 kJ E) 7.9 kJ
If R1 = 3.0 ?, R2 = 6.0 ?, R3 = 12 ?, and I = 0.50 A, at what rate is heat being generated in R1?
a.
20 W
b.
17 W
c.
12 W
d.
31 W
e.
6.0 W