A 55 kg snowboarder (including equipment) heads down a ski hill starting at a height of 100 m, from an initial speed of 6.3 km/h. Determine the speed she could attain by the time she arrives at the bottom of the hill if there is no friction. If she only reaches a speed of 90 km/h, what was the percentage of energy lost to friction? pls help

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by