How does combining two substances of the same temperature increase the thermal energy of the mixture?​

50 points to who answers this question in a clear and simple explanation : to what hight will a mass of weight of 500 n be raised in 20 seconds by a motor using 4kw of power?

James joule carefully measured the difference in temperature of the water at the top and bottom of a waterfall. why did he expect a difference

Earth has a mass of 5.97 x 1024kg, and a mean radius of 6.38 x 106m. what would be the orbital speed and period of a satellite in orbit 1.44 x 108 m above earth?