1. a proton is first accelerated from rest through a potential difference v and then enters a uniform 0.750-t magnetic field oriented perpendicular to its path. in this field, the proton follows a circular arc having a radius of curvature of 1.84 cm. what was the potential difference δv? sketch the situation and start newton’s second law and conservation of energy to derive the equations you use to solve the problem. (mproton = 1.67 × 10-27 kg)

Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f