An airplane flies with a velocity of 55.0 m/s [35o n of w] with respect to the air (this is known as air speed). if the velocity of the airplane according to an observer on the ground is 40.0 m/s [53o n of w], what was the wind velocity?

Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor

Acharge of 8.4x10^-4 c moves at an angle of 35 degrees to a magnetic field that has a field strength of 6.7x10^-3 t. if the magnetic force is 3.5 x10 ^-2 n, how fast is the charge moving?

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.