A hockey stick stores 4.2 H of potential energy when it is bent 3.1 cm. Treating the stick as a spring, what is the spring constant?

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?