Author Question: The relativistic kinetic energy formula is valid A) only for speeds near the speed of light. B) ... (Read 73 times)

809779 · **on:** Jul 29, 2018

The relativistic kinetic energy formula is valid

A) only for speeds near the speed of light.
B) at all speeds.
C) only for subatomic particles, such as electrons and protons.

Question 2

A +5.0-nC charge is at the point (0.00 m, 0.00 m) and a -2.0-nC charge is at (3.0 m, 0.00 m). What work is required to bring a 1.0-nC charge from very far away to point (0.00 m, 4.0 m)? (k = 1/40 = 9.0 109 N m2/C2 )

A) 15 nJ
B) 3.6 nJ
C) 11 nJ
D) 7.7 nJ