A proton traveling at a speed of 3.5x10 ^-6 m/s passes perpendicular to a uniform magnetic field of 4.2x10 ^-2 T. What is magnitude of the force on the proton while the proton is in the magnetic field?

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2. a. 9.5 m b. 11.9 m c. 15.2 m d. 23.8 m