Recent content by fiziks09

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 ?.

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

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...

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...

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??

okay.. but converting the unit still gives a wrong answer...

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...

i got 1.5 i used C_v to be 3/2R since the gas is monoatomic and C_p to be 5/2R

ok.. but I'm getting a wrong answer which is 5.9atm but it should be 1atm...

okay..i get that part.. is the constant R??

quotient of heat capacities?? please i don't understand that part!

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...

yeah its perfectly okay now.. Thanks a bunch for figuring it out.

ohh.. that would be half the distance right?... which is 9m

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)