Aproposed space station consists of a circular tube that will rotate about its center (like a tubular bicycle tire), fig. 5–39. the circle formed by the tube has a diameter of 1.1 km. what must be the rotation speed (revolutions per day) if an effect nearly equal to gravity at the surface of the earth (say, 0.90 g) is to be felt?

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.