A motorboat maintained a constant speed of 15 miles per hour relative to the water in going 12 miles upstream and then returning. The total time for the trip was 2.5 hours. Use this information to find the speed of the current.
The speed of the current is
miles per hour.

The key to stability is feedback between the reservoir and the fluxes into and/or out of the reservoir. assume that the rate of outflow from a reservoir depends on the size of the reservoir according to the following relationship: outflow rate= k x (size of reservoir), where k is a constant. a reservoir of water has a volume of 5000 liters, and the rate of outflow at steady state is 25 liters per minute. what is k? (give both the numerical value and its units.) what is the residence time? what is the relationship between k and the residence time?

What kind of simple machine is a catapult?

Amother used 150 watts of power to raise a 15 newton object in a time interval of 8.0 seconds. through what vertical distance was the object raised ?