A circular plate of radius r meters is totally submerged vertically in a tank of water. The center of the circle is k meters below the surface of the water. Show that the fluid force on thesurface of the plate is F = 9800  k  ( r 2 ) . (Hint: Evaluate one integral by a geometric formula and the other by observing that the integrand is odd.)

Asmall, positively charged ball is moved close to a large, positively charged ball. which describes how the small ball likely responds when it is released? it will move toward the large ball because like charges repel. it will move toward the large ball because like charges attract. it will move away from the large ball because like charges repel. it will move away from the large ball because like charges attract.

J. j. thomson’s experiment disproved the theory that an atom

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.