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a 2.5 kg box is pulled straight to the right with a force of 16n.

since it is sliding horizontally on a surface, what is the normal force (fn) the floor supports it with?

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same

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.

Which of the following are molecules? a. al b. ag c. mgcl2 d. nacl e. c3h8