The new river gorge bridge in west virginia is a steel arch bridge 518 m in length. how much does the total length of the roadway decking change between temperature extremes of –20.0°c and 35.0°c? the result indicates the size of the expansion joints that must be built into the structure.

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.

Which type of reaction is shown in this energy diagram ?

The researcher who studied the ability of cats to learn to escape from puzzle boxes was