Determine the kinetic energy of a 575-kg roller coaster car that is moving with a speed of 16.0 m/s. __ j what is the kinetic energy if the coaster was moving at twice the speed? j the kinetic energy now is times greater.

7types of electromagnetic waves from lowest to highest frequency

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?

An airplane is flying with a velocity of 240 m/s at an angle of 30.0∘ with the horizontal, as the drawing shows. when the altitude of the plane is 2.4km,a flare is released from the plane. the flare hits the target on the ground. what is the angle θ?