A machine performs 90 J of work in lifting an object. It requires 120 J of work do lift it. How much heat is created by the machine?

What is meant by "steam distillation"? choose the correct option from below. a. A distillation in which the source of heat is steam from a boiling water bath. b.

What are some questions you have about the big bang theory. can you also add some of your understanding?

Alguien me podria ayudar con esto pliz ... Ahora resuelva el siguiente ejercicio, tenga presente lo visto en clase y aprendido en los puntos anteriores Un móvil parte del reposo, al llegar a los 4 segundos lleva una velocidad de 12m/s, al llegar a

A sample of the inert gas krypton has its pressure tripled. if the original volume is 12 l, what is the final volume in l

Franny made a chart to summarize the characteristics of the two nuclear forces. Which describes the error in her chart? The strong nuclear force must be strong enough to overcome the repulsive force of protons, not electrons.

How long does it take for light from a star that is 8 light years away to reach Earth? Question 7 options: 8 earth minutes 16 earth minutes 8 earth years 16 earth years

Why does water in hot springs always remain hot? Why doesn't it's thermal energy spread out?

True or false All forces are different; each exerts a particular type of effect on a object

The Yerkes refracting telescope has a 1.00 m diameter objective lens of focal length 20.0 m. Assume it is used with an eyepiece of focal length 2.50 cm. (a) Determine the angular magnification of the planet Mars through this telescope.

A small kid sits on a bike (Anita). A bigger and stronger person (Jamy) pushing the kid so that the kid starts speeding up. (neglect friction). Mark all correct statements about the forces between them. A.