If no magnetic field were applied, would you expect the electron beam to be deflected upward or downward by the electric field?

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

In a good thermo flask the main cause of heat loss is