A proton moving at a 52.3° angle to a
magnetic field of 0.525 T feels a
magnetic force of 3.39 x 10-17 N. How
fast is it moving?

.
Charge of proton: e = 1.60 x 10-19 C
[?] m/s

Suppose that a comet that was seen in 563 a.d. by chinese astronomers was spotted again in year 1951. assume the time between observations is the period of the comet and take its eccentricity as 0.986. what are (a) the semimajor axis of the comet's orbit and (b) its greatest distance from the sun?

In the circuit shown below, with each bulb holding a resistance of 60 ohms, how many amps of current are flowing? express your number as a decimal.

What object a collides with object b and bounces back its final momentum is?