Two astronauts push on a satellite. One pushes in the positive x-direction with a force of 42N, and the other pushes in the positive y-direction. If the net force is at an angle of 15° above the positive x axis, what is the magnitude of the second astronaut’s force? Write the known and unknown from the problem, the formula, a free-body diagram, then solve.

What would the difference of spectral lines emitted by hydrogen gas in distant galaxies which is normally found at a wavelength of 21 cm on earth, be observed at 21.1 centimeters?

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat