A ping-pong ball is moving at 7.55 m/s at right angles to Earth’s 44.0 μT magnetic field. How much charge would you need to put on the 2.70 g ping-pong ball so that the magnetic force on the ball is equal in magnitude to the gravitational force on the ball? Assume g = 9.80 m/s2 . Note: The charge is unrealistically large!

The pressure, volume, and temperature of a mole of an ideal gas are related by the equation pv = 8.31t, where p is measured in kilopascals, v in liters, and t in kelvins. use differentials to find the approximate change in the pressure if the volume increases from 14 l to 14.6 l and the temperature decreases from 375 k to 370 k. (round the answer to two decimal places.)

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

More solar radiation is absorbed by earth’s surface than by