Homework Statement
the problem is one of understanding. if heat is incident on a surface raising the temperature to some number then conducts through the solid to the other side how much heat energy is actually at the other side?? i understand the temperatures will be different and that heat...
sure that's sounds good,
the albedo of Mars is 0.15 so it will take in 0.85 of the suns energy after initial reflection.
will it then re emit all of this?
also does anyone know the relationship between altitude and thermal emmission, the satellite I am trying to design will fly 278km above...
sure thing but as Mars is not a blackbody then what value shall i use for the emmissitivty? (e in the equation P=e*sigma * t^4* area)
also would atmospheric makeup have an effect?
cheers
Homework Statement
the thermal radiation of mars
Homework Equations
i understand Earth radiates at 237W/m^2 into space but i can't find out how much Mars radiates, i know it has an average temp of -55 degrees C so i know its going to be a lot less but i don't know how much. i need this...
Homework Statement
Well to many this will probably seem trivial but i can't work out what physically a 'node' is. i understand from year one it the bit in a standing wave that doesn't move etc but I am doing a project at the moment on designing a spacecraft and there's a lot of talk of...
hey guys,
im doing a report on binary stars, using doppler shifts to get some results for periods etc but bit unsure about how to do the errors?
i realize that the errors arise in the speed of the stars and the dispersion of the photons but how could i calculate this?
cheers for any help
x
hey guys,
anyone know what the scale factor and density would be when the universe is at maximum size. just getting into cosmology recently and this one is puzzling me.
cheers all
steve-o