A box with a mass of 15.0 kg is being pushed on a level surface with a horizontally applied force. It just starts to slide when 40.0 N is applied
and will continue to slide if 35.0 N is applied to the box. What is the
Normal Force (FN) acting on the Box?

Which of the following would not be taken into consideration when describing the quality of a sound

Aplane takes off from an airport and flies to town a, located d1 = 215 km from the airport in the direction 20.0° north of east. the plane then flies to town b, located d2 = 230 km at 30.0° west of north from town a. use graphical methods to determine the distance and direction from town b to the airport. (enter the distance in km and the direction in degrees south of west.)

In a system, when potential energy decreases, then entropy also decreases. true false