A384 m long train is moving on a straight track with a speed of 77.3 km/h. the engineer applies the brakes at a crossing, and later the back of the last car passing the crossing with a speed of 19.5 km/h. assuming constant acceleration, determine how long the train blocked the crossway. disregard the width of the crossing. convert the time into three different units: s, min, and hr.

How are series and parallel circuits simililar? both have multiple paths for electrons to travel. both require resistors in their circuits. both require a switch to complete the circuit. both have at least one path for electrons to travel.

Which composition of water moves to begin a deepwater current?

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.