15. What is the magnitude of the magnetic field required to keep a proton moving in a circle of radius 1 at speed of 2.5x 10?m/s? (take mass of proton to be Mp=1.67x 107 kg)​

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?