A geology student finds a sample of sediment that is approximately 5 millimeters in diameter and is easy to throw. In which category would the student most likely classify this sediment?

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

Abeam of electrons moves at right angles to a magnetic field of 4.5 × 10-2 tesla. if the electrons have a velocity of 6.5 × 106 meters/second, what is the force acting on the electrons? the value of q = -1.6 × 10-19 coulombs.

Ineed to answer this problem but i lack in knowledge, what should i study to answer this problem? i have never used derivatives in a physics problem so i'm not sure what's happening and i can't find videos explaining.