What will happen if there is a change in a magnetic field? a)the magnetic field will increase. b)the magnetic field will decrease. c)an electric field will be produced. d)the magnetic field will collapse.

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.)

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?