Homework Statement
The Sun rotates with a period of 24.7 days and has a radius of 7.00 x 108 m. For a terrestrial observer, Calculate the resultant Doppler shift of light of wavelength 500 nm which is emitted from the solar equator at :
i)each side of the disc,
ii)the center of the solar disc...
:redface: ooo my... that's embarrassing...i always end up doing extra work...or over thinking it...thanks soo much, followed your guidance and got M2 to be 18.67kg... by subtraction from 19 .. Mass escape worked out to be 0.33kg
Homework Statement
A cylinder containing 19 kg of compressed air at a pressure 9.5 times that of the atmosphere is kept in a store at 7 degrees Celsius. When it is moved to a workshop where the temperature is 27 degrees Celsius a safety valve on the cylinder operates, releasing some of the...
I have failed my two semesters of biology and its not like i didn't read the material given or didn't do the work given...
I just can't seem to pass, now I am repeating in the summer and i am terrify, to the point where i am even afraid to try...
I have tried all methods of studying... i...
:biggrin: YAYYYYY i got!...geezeeee that was simple enough...
ok this is what i did ...please let me kno if I am correct...although i think i am
soo you said to start from the power i got in part (i) which was 1050 J/s
Therefore for rate of flow of heat( which is power) dQ/dt =...
Homework Statement
If a copper kettle has a base of thickness 2.0mm and an area 3.0 x 10-2 m2 estimate the steady difference in temperature between the inner and outer surface of the base which
must be maintained to enable enough heat too pass through so that the temperature of 1 kg of...
Well i was thinking in lines of finding out the heat required to raise the temperature of water in the container to 100 degrees celsius. since that will be the new temperature in the container when steam passes through ... finding that heat required for the change of water temperature, i added...
I am trying to find out how much water now in the container after the steam as passed in...the answer suppose to be 0.1225 kg , I am not understanding where i must have gone wrong... or if i missed out a step.
Homework Statement
0.02 kg of ice and 0.10 kg of water at 0 degrees Celsius are in a container. steam at 100 degrees Celsius is passed in until all the ice is just melted. How much water is now in the container?
Specific latent heat of steam = 2.3 * 10^6 J/kg
Specific latent heat of ice = 3.4...
No reason to apologize, didnt seem as if you barge in, however with your constructive advice i would of liked some form of help in regards to correcting where i did go wrong as you have pointed out.
Homework Statement
A bus is traveling steadily at 30 m/s along a straight road passes a stationary car which, 5s later, begins to move with a uniform acceleration of 2 m/s^2 in the same direction as the bus.
(i) how long does it take the car to acquire the same speed as the bus?
(ii)...