If the speed of an electron travelling at right angles to the magnetic field is doubled, how many times as great is the force on the electron?

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

A17,250 kg rocket is pushed with a thrust of 6,450,284 n. what is the acceleration of the rocket?