Homework Help: PHYSICS

Posted by PLEASE HELP(DUE SOON) on Monday, November 26, 2012 at 2:02pm.

Lake Erie contains roughly 4.00 1011 m3 of water.
(a) How much energy is required to raise the temperature of that volume of water from 9.0°C to 11.0°C?
J

(b) How many years would it take to supply this amount of energy by using the 1250-MW exhaust energy of an electric power plant?
yr

PHYSICS - Elena, Monday, November 26, 2012 at 2:36pm
For water, density is ρ =1000 kg/m ³,
V =4•10¹¹ m³ => m=ρ•V=1000•4•10¹¹ =4•10¹⁴ kg,
c =4183 J/kg•K, ΔT=11-9 =2 K.
E=Q= m•c• (T₁-T)= m•c• ΔT =4•10¹¹•4183•2=3.3464•10¹⁸ s
(b) E=P•t
t=E/P=3.3464•10¹⁸/1250•10⁶=2.677•10⁹ s=2.677•10⁹/365•24•3600=84.9 years.

Answer this Question

Related Questions

physics - Lake Erie contains roughly 4.00 1011 m3 of water. (a) How much energy ...
physics - Lake Erie contains roughly 4.00 multiplied by 1011 m3 of water. (a) ...
Physics - Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that...
Physics - Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that...
Physics - Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that...
Physics-is this correct? - Lake Erie contains about 4.8 x 10^17 grams of fresh ...
Physics - Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that...
Physics - Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that...
Physics - Assume the optimal coffee drinking temperature is 75°C, and ...
physics - The specific heat capacity of steel is 445 Jkg K. How much energy is ...

For Further Reading

First Name:
School Subject:
Answer: