Astudent goes to the beach on a very hot day. she steps on the sand and jumps because it is so hot. what type of heat transfer is this? a) conduction b) convection c) radiation d transmission

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?

The energy released by a nuclear fusion reaction is produced when

Which form of pure carbon is so hard that it can be used in cutting tools?