Asurface by a 15.7 kg 72.2 n block is dragged over a rough, horizontal force acting at 21 ° above the horizontal. , and the coefficient of kinetic the block is displaced 4.5 m friction is 72.2 n force. (d) what is the increase in internal energy of the block surface system due to friction? (e) find the total change in the block's kinetic energy

Two thin 80.0- cm rods are oriented at right angles to each other. each rod has one end at the origin of the coordinates, and one of them extends along the x- axis while the other extends along the yaxis. the rod along the x- axis carries a charge of - 15.0 μ c distributed uniformly along its length, and the other rod carries 15.0 μ c uniformly over its length. find the magnitude and direction of the net electrical force that these two rods exert on an electron located at the point (40.0 cm, 40.0 cm). (e

The slope of a velocity time graph over any interval of time gives the during that interval

Ascientific blank must be testable and capable of being proven false?