Please please answer my question took a picture

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?

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car