# Recent content by fiziks09

1. ### Molar specific heat of an ideal gas

Okay..i have been on this quite a while now.. i substituted n = PV/RT in the equations for both constant pressure and constant volume.. i then used p = 3P and v = 2V.. but it didn't work.. Also..how about the initial states of the gas, i couldn't figure out where to fit them in ?.
2. ### Molar specific heat of an ideal gas

thanks.. i noticed that..but the thing is i don't know where to fit that information. I also can't think of any other equations relevant to the question aside from the ones in put up there
3. ### Molar specific heat of an ideal gas

Homework Statement A sample of a diatomic ideal gas has pressure P and volume V. When the gas is warmed, it's pressure triples and the it's volume doubles. This warming process includes two steps, the first at constant pressure and the second at constant volume. Determine the energy...
4. ### Refrigerator and Heat Pump

Allright i got it now.. since 1kWh = 3.6MJ (which is 3600000J) 1.25kWh X 36000000 = 4.5 X 10^6 Joules.. thanks for the help...
5. ### Refrigerator and Heat Pump

okay i might have misunderstood. i'm so sorry..what conversion is being made? is it from kWh to Joules or what? if so how so??
6. ### Refrigerator and Heat Pump

okay.. but converting the unit still gives a wrong answer...
7. ### Refrigerator and Heat Pump

Homework Statement A freezer has a coefficient of performance of 6.30. It is advertised as using electricity at a rate of 457kWh/yr. a)On average how much energy does it use in a single day? b) What maximum mass of water at 20.0 degree celsius could the freezer freeze in a single day...
8. ### Calculating final pressure

i got 1.5 i used C_v to be 3/2R since the gas is monoatomic and C_p to be 5/2R
9. ### Calculating final pressure

ok.. but i'm getting a wrong answer which is 5.9atm but it should be 1atm...
10. ### Calculating final pressure

okay..i get that part.. is the constant R??
11. ### Calculating final pressure

quotient of heat capacities?? please i don't understand that part!!!!
12. ### Calculating final pressure

Homework Statement As a 1.00 mol sample of a monoatomic gas expands adiabatically the work done on it is -2.50x10^3J. The initial temperature and pressure of the gas are 500k and 3.60atm. Calculate a. The final temperature and b. The final pressure. Homework Equations First law...
13. ### Center of mass for a raft

yeah its perfectly okay now.. Thanks a bunch for figuring it out.
14. ### Center of mass for a raft

ohh.. that would be half the distance right?... which is 9m
15. ### Center of mass for a raft

Well i think that the raft has (0,0) the NE car has (18,18) the SE car has (18,-18) the SW car has (-18,-18)