An object having a core temperature of 1700 is removed from a furnace and placed in an environment having a constant temperature of 80. one hour after being removed, the core temperature is 1300. how many hours will it take for the core temperature of the object to drop to 850

Which quantities are scalars? choose all that apply a. distance b. speed c. acceleration d. velocity

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •