A proton (m = 1.7 × 10?27 kg, q = +1.6 × 10?19 C) starts from rest at point A and has a speed of 40 km/s at point B. Only electric forces act on it during this motion. Determine the electric potential difference VB?VA.

A. +8.5 V
B. ?8.5 V
C. ?4.8 V
D. +4.8 V
E. ?17 V


Answer: B

Physics & Space Science

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Point charges q and Q are positioned as shown. If q = +2.0 nC, Q = ?2.0 nC, a = 3.0 m, and b = 4.0 m, what is the electric potential difference, VA ? VB?



a.
8.4 V

b.
6.0 V

c.
7.2 V

d.
4.8 V

e.
0 V

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A 10-gram wire that is 6.0 m long is under tension. When a transverse wave of frequency 280 Hz travels along the wire, its wavelength is 0.60 m,and its amplitude is 8.4 mm

How much time does it take for a crest of the transverse wave to travel the length of the wire? A) 36 ms B) 31 ms C) 40 ms D) 44 ms E) 49 ms

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Find the resonant frequency for a series RLC circuit where R = 10 ?, C = 5.00 ?F, and L = 2.00 mH

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