Aroller coaster car is moving 19.8 m/s on flat ground when it hits the brakes. it decelerates at -3.77 m/s squared over the next 45.8 m how much time does it take? me. i have been trying for the past hour

Which terms describe the purpose of antennas on devices that use radio waves? transmit and receivemodify and amplifyamplify and receivemodify and transmit

The amount of potential energy possessed by an elevated object is equal to what?

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up