A 40 % efficient machine operates with an input force of 3000N. what is the output force if ima is 8​

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

How to tell if a molecule is polar or nonpolar with electronegativity

Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?