Hot water at 100⁰C is added to 300gm of water at O⁰C until their final temperature of the mixture is 40⁰C .Calculate the mass of the hot water added.

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?

Difference between natural and artifical magnet