A closed system's internal energy changes by 178 J as a result of being heated with 658 J of energy. The energy used to do work by the system is J.

A table tennis ball with a mass of 0.003 kg and a soccer ball with a mass of 0.43 kg or both Serta name motion at 16 M/S calculate and compare the moments of both balls

A simple model of the hydrogen atom suggests that the electron orbits the proton. What is the force that keeps the electron in orbit? A. Electrostatic B. Gravitational C. Strong nuclear D. Centripetal

Which topic in a biology textbook is directly related to physics?

A book that has a mass of 0.5 grams is pushed across a table with a force of 20 newtons what is the acceleration of the book? A. 10 m/s^2 B. 0.025 m/s^2 C. 40 m/s^2 D. 40 m/s

A small hot-air balloon is filled with 1.02*106 l of air (d = 1.20 g/l). as the air in the balloon is heated, it expands to 1.09*106 l. what is the density of the heated air in the balloon?

What is the direction of the force when an object moved in a circle

An observer notes that the pitch of a sound is becoming progressively higher. the observer can conclude that the sound is moving

A falling back in mid air has what

What objects are often arranged by their properties

Which nuclei is not radioactive? A. Am-241 B. Mg-24 C. Pu-241 D. U-238