which of the following has least momentum .01 kg of mass moving at 200 m/s 1kg mass moving at 35 m/s or 100 kg mass moving at 3m/s or 2,000 kg mass moving at 0.1 m/s

When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m

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?

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine