Tuesday

July 22, 2014

July 22, 2014

Posted by **Zach** on Monday, November 30, 2009 at 2:07pm.

- Physics -
**bobpursley**, Monday, November 30, 2009 at 2:15pmpotentialenergy= mgh=1kg*9.8N/kg*26m

massflow*g*h/time * .80=54*10^6

Flowrate=54^10^6/gh * 1/.80

- Physics -
**drwls**, Monday, November 30, 2009 at 2:19pmIf what you are calling ∆U includes the gravitational potential energy*, then it is -(density*g*(delta H)

= -(10^3 kg/m^3)*26 m*9.81 m/s^2

The product will be in Joules.

For P = 54*10^6 Watts, you need a mass flow rate such that

P = (mass flow rate)*(∆U)

*Usually, in thermodynamics, U represents internal energy only, which has nothing to do with elevation.

- Physics -
**drwls**, Monday, November 30, 2009 at 2:22pmI forgot to include the 80% efficiency factor, but BobPursley did it right

**Related Questions**

Science - When people want to use water to create electricity they generally ...

physics - One kg of water is moving 2 m/s as it goes over a dam. At the base of ...

Physics - Water flows approx. 0 over a dam at the rate of 660 kg/s and falls ...

PHYSICS ---HELP! - Water flows approx. 0 over a dam at the rate of 660 kg/s and ...

physics - Water flows (v approx. 0) over a dam at the rate of 660 kg/s and falls...

physics/ math - Water flows (v approx. 0) over a dam at the rate of 660 kg/s and...

maths - a dam holds 13.5 megalitres of wate when full. If water flows from the ...

Help! Physics!! - Water flows (v = approx 0) over a dam at the rate of 660 kg/s ...

Physics - Calculate the water pressure at the base of the Hoover Dam. The depth...

Physic - A dam is used to block the passage of a river and to generate ...