Recent content by lasisdabomb

Hello Physics Forum. I have to complete a solar water heater project for school and choosing between what would be better for the insulation of a tin reservoir. I'm leaning towards the glad wrap bag because it will let more light hit our reservoir. However it will be a quite windy day and cotton...

I've realized how to do it. The Power is average for each m^2 of earth. That means the surface area should be 1m^2 and the Power should be 390. By subbing everything in, you get an average surface temperature of 288 Kelvin or 15°C

Is the 390 m^-2 relevant for the equation. Should that be stated as the P value or should it just be 390W

Homework Statement The Earth receives on average about 390 W m−2 of radiant thermal energy from the Sun, averaged over the whole of the Earth. It radiates an equal amount back into space, maintaining a thermal equilibrium that keeps the average temperature on Earth the same. Assuming the Earth...

Homework Statement Taking the intial velocity to be 10.0 m/s, g to be 9.8m/s2 and ignoring effects of air calculate: -the total time of flight of the ball -the maximum height it reaches variables: u=10 a=9.8 Homework Equations v=u+at x=vt-1/2at The Attempt at a Solution I've recently...