the surface of area of a small piston a is 0.01m^2, the surface area of the big piston A is 0.1m^2 and the effort is 150N, calculate the magnitude of the load F? (a)39N (b) 50N (c) 20N (d) 10N

What do radio waves and microwaves have in common? both are at the side of the spectrum that has the shortest wavelengths. both are at the side of the spectrum that has the lowest radiant energy. both are at the side of the spectrum that has the lowest frequency. both are found next to visible light on the electromagnetic spectrum.

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?

According to social exchange theory, altruistic behaviors benefit the individual who performs them.