How much charge must pass by a point in a wire in 10 s for the current inb the wire to be 0.50 A?
A) 2.0 C B) 20 C C) 0.050 C D) 5.0 C
D
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The ratio of power outputs of Jack and Jill is 2:1 to complete a certain amount of work. If Jill takes 4 minutes to complete this work, how long will Jack take to finish the same work?
A) 2 minutes B) 1.4 minutes C) 8 minutes D) 6 minutes E) 4 minutes
An electron, initially at rest, accelerates through a potential difference of 1 V, gaining kinetic energy KEe, while a proton, also initially at rest, accelerates through a potential difference of –1 V, gaining kinetic energy KEp, which of the following relationships holds?
1. KEe = KEp 2. KEe < KEp 3. KEe > KEp 4.The answer can’t be determined from the given information
Mars spins on its axis at approximately the same speed as Earth, yet it has no magnetic field. Why not?
A. Mars is small and cooled quickly. B. Mars is farther from the Sun than Earth is. C. Mars has no iron core. D. None of these choices is correct.
The Milky Way can be seen only from the Northern Hemisphere
Indicate whether the statement is true or false