Recent content by jdog6

i believe i have a lead t = time constant but i don't know what that is...

Can anybody help?

This is for a lab I have done and I am stuck on this, Question : Plot a curve of In (1 - V/Vo) vs time and calculate C from the slope of the line. Initial equation = V = Vo(1-e^-t/RC) Calculated Linear Equation : In (1 - V/Vo) = -t/RC Therefore from y = mx + b = m = -t/RC (i think)...

The mass of the deuterium molecule is twice that of the hydrogen molecule. If the vibrational frequency of helium is 1.34x10^14 Hz, what is the vibrational frequncy of deuterium, assyming that the spring constant of attracting forces is the same for the two species? Answer in units of Hz...

A vessel containing 8.43 kg of water at 21.1C is put into a refrigerator. The 0.1655 hp motor runs for 9 min to cool the liquid to the refrigerator's low temperature 4C. What is the COP of the refrigerator? W=P(delta)t = 123.463Wx540s = 66670.02 J COP = Qc/W Please Help. Thank...

On a hot day, a Florida home is kept cool by an air conditioner. The outside temperature is 42.8C and the interior of the home is 21C. If 25 kJ/h of heat is removed from the house , what is the minimum power that must be provided to the air-conditioner? Answer in units of kJ/h. I'm...

The energy comes from rods outside.

the question does not say all i have is what i posted

A heat pump has a coefficient of performance of 7.05. If the heat pump absorbs 20 cal of heat from the cold outdoors in each cycle, find the heat expelled to the warm indoors. Answer in units of cal. I believe COP (heating mode) : 7.05 and COP = Qh/W Qc = 20 cal so I have to find Qh= ? cal...

A tank of volume 0.413 m3 contains 2.79 mol of helium gas at 5C. Assume that the helium behaves like as an ideal gas. The universal gas constant is 8.31451 J/Kmol, and Boltzmann's constant is 1.38066 x10^-23 J/K. Find the total thermal energy of the system. Answer in units of J. Would...

All right, I have to calculate the uncertainty of the grating constant (k=1/d). I know that the standard deviation of my 14 values of d(spacing bewtween 2 slits in a diffraction grating) is ± 5.031x10-16 m. Average d = 3.403x10-6m . k= 2.939x105lines/m. How would I find uncertainty...

I did a physics lab about diffraction grating where we had to determine the angular positions of all spectral lines of the helium discharge tube. I have 3 questions : 1. Why use a discharge tube instead of a light bulb? - I think it might be because you would have to break up the white...

Correct! Thank you very much!

Ok i understand but how do i fit it into the equation? k(6A)(Th-Tc)/L ?

Why x6 we are looking for overvall heat loss from this thermos like apparatus.