An electron of mass 9.11 × 10^?31 kg moves with a speed of 0.660c. What is its kinetic energy? (c = 3.00 × 10^8 m/s)
a. 2.71E–14 J
b. 1.09E–13 J
c. 8.20E–14 J
d. 1.79E–14 J
e. 2.04E–14 J
a
You might also like to view...
Which of the following pure annealed materials would you expect to have the highest yield stress?
(a) FCC copper (b) BCC iron (c) HCP magnesium (d) LDPE
You throw a rock horizontally off a cliff with a speed of 20 m/s. Assuming no effects of air, after 2.0 s, the magnitude of the velocity of the rock is closest to
A) 28 m/s B) 20 m/s C) 40 m/s D) 37 m/s
On a clear day, the sky appears to be more blue toward the zenith (overhead) than it does toward the horizon. This occurs because
A) the atmosphere is denser higher up than it is at the Earth's surface. B) the temperature of the upper atmosphere is higher than it is at the Earth's surface. C) the sunlight travels over a longer path at the horizon, resulting in more scattering. D) none of the given answers
How many times does the Moon rotate on its axis in one orbital period?
A. several times B. twice C. only once D. The Moon does not rotate.