A river 75. m wide is travelling due south at 2.0 m/s. A fisherman trying to cross the river heads due east in their boat at a speed of 3.0 m/s relative to the river. Determine the resultant velocity of the boat relative to the river.

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How long will it take the fisherman to cross the river?

When an object is heated it contracts. a. true b. false

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?

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?