A proton, with mass 1.67x10^-27 kg and charge 1.6x10^-19, is sent with velocity 2.3x10^4 m/s in the x direction into a region where there is a uniform electric field of magnitude 780 V/m in the y direction. What must be the magnitude and direction of the uniform magnetic field in the region if the proton is to pass through undeflected

Determine which heat transfers below are due to the process of conduction. i) you walk barefoot on the hot street and it burns your toes. ii) when you get into a car with hot black leather in the middle of the summer and your skin starts to get burned. iii) a flame heats the air inside a hot air balloon and the balloon rises. iv) a boy sits to the side of a campfire. he is 10 feet away, but still feels warm. a) i and ii b) iii and iv c) i, ii, and iv d) ii, iii, and iv