The fact that if the price of milk, butter, or cab rides increases, people might switch to soy milk, margarine, or the bus, is an example of what factor that shifts demand?
a. income
b. consumer tastes
c. prices of related goods
d. consumer expectations

Frost wedging occurs when water seeps into a crack in a rock, freezes, and causes the crack in the rock to widen. t or f

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?

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.