Physics
posted by Kayla .
Water is lifted out of a well 30.0m deep by a motor rated at 1.00hp. Assuming 90% efficiency, how many kilograms of water can be lifted in 1 min?
Answer is 137kg but can not figure it out.

mgh/60sec=1hp(.9)(746watts/hp)
mass= 60sec/(9.8N*30m)*747nm/sec)*.9
=137
Respond to this Question
Similar Questions

Electricity
A motor running at its rated power provides 2.6 lbft torque at its rated speed of 2020 rpm. The motor draws 5.6A from a 230V supply at a phase angle of 37 degrees. Determine the following: The horsepower delivered by the motor, … 
Applied Mech. (with my answer..lol)
What load can be lifted by a screw jack given: Toggle1 length:520mm Force applied:230N Toggle2 lenght:445mm Force applied:300.557N Mean pitch of thread:13mm S.J. efficiency:35% My answer: Assuming T2 to be 520mm long, the equivalent … 
Is my math correct(2)
What load can be lifted by a screw jack given: Toggle1 length:520mm Force applied:230N Toggle2 lenght:445mm Force applied:300.557N Mean pitch of thread:13mm S.J. efficiency:35% My answer: Assuming T2 to be 520mm long, the equivalent … 
Physics
Water is lifted out of a well 25.0 m deep by a motor rated at 1.50 hp. Assuming efficiency 90%, how many kilograms of water can be lifted in 1 min? 
physics
Water is lifted out of a well 38.0m deep by a motor rated at 1.00hp. assuming70% efficiency, how many kilograms of water can be lifted in 1 min? 
Math (for Damon)
Nathan and Steven stacked boxes on a shelf. Nathan lifted 13 boxes and Steven lifted 15 boxes. The boxes that Nathan lifted each weighed 12 lb more than the boxes Steven lifted. Which expression represents the total number of pounds … 
Mathematics
Nathan and Steven stacked boxes on a shelf. Nathan lifted 13 boxes and Steven lifted 15 boxes. The boxes that Nathan lifted each weighed 12 lb more than the boxes Steven lifted. Which expression represents the total number of pounds … 
math  calculus help!
An inverted conical tank (with vertex down) is 14 feet across the top and 24 feet deep. If water is flowing in at a rate of 12 ft3/min, find the rate of change of the depth of the water when the water is 10 feet deep. 0.229 ft/min … 
Physics
Ten litre of water per second is lifted from well through 10m and delivered with a velocity of 10m/s if g=10m/s^2. The power of motor is Answer 1.5Kw how ? 
Physical Science
Two objects were lifted by a machine. One object had a mas of 2 kilograms, and was lifted at a speed of 2 m/sec. The other had a mass of 4 kilogram was lifted at a rate of 3 m/sec.  a) Which …