4. Excessive heat in an engine increases___and may lead to preignition.

Determine the maximum r-value of the polar equation r =3+3 cos 0

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

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?