Que parte de la nevera es menos fria​

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Infrared rays have a shorter wavelength than question 11 options: x-rays. ultraviolet rays. radio waves. gamma rays.