If King Kong fell straight down from the top of the Empire State Building (380m high), what is his velocity just before “landing”? a 0.00 m/s
b 86.3 m/s
c -86.3 m/s
d 38.7 m/s

If the speed of a particle triples ,by what factor does its kinetic energy increase?

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?

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?