Solution: What size of motor is requires to lift 800 lbs. in 40 seconds

Solution: What weight can an 80-hp motor lift through a distance of 40 feet

Solution: Compare the electrical resistance offered by two pieces of wire of the same material

Solution: Find the original speed of the boat

Solution: Determine the communication range in miles between the plane and the carrier

Solution: Find the length of the cable 75 mm in diameter with resistance of 1/6 ohm

Solution: Find x, when z = 4 and y = 16

Solution: Find w when x = 1, y = 4 and z = 2

Solution: How far downstream should he go if he is to return in 7/4 hours after leaving?

Solution: What is the speed of the boat in still water?