the picture below shows a car turning counter clockwise at constant speed. select the vector that would indicate the car's instantaneous velocity at this point

An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?

What is the relationship between globular clusters and the milky way?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?