Two identical spools are held the same height above the floor. a thread is wrapped many times around spool a. the same thread passes over a pulley, and is attached to a fixed point on spool b, so that spool b will not rotate. an x is marked on the floor directly below each spool. both spools are released from rest at the same instant. (assume that the pulley and thread are massless and that the axle of the pulley is frictionless.)

Which statements describe the movement of ocean currents around the globe? check all that apply. strong winds force warm water to sink to the ocean floor. the coriolis effect causes warm and cold water to mix. cool dense water sinks to the ocean floor. warm water replaces cool surface water. wind blowing parallel to the shore causes upwelling of cool water.

Since the energy was not raising the temperature of the water during these segments, what was the energy used to do instead? your answer must include an explanation of what is happening to the molecules.

First answer marked as brainiest which is the correct equation describing the first law of thermodynamics? a) when the internal energy of a system changes, it equals the amount of heat added plus the work done. b) when work is done by the piston, it is equal to the heat added plus the change in internal energy of the system. c) when heat is added to the system, it is equal to the amount of work done by the piston plus the change in internal energy of the system.