Aforce of 20 n is executed to raise a rock weighing 30 n. what is the actual mechanical advantage?

show the wavelengths of a wave. show the crests of a wave.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.