A photon (Select all that apply) Group of answer choices is a quantum of electromagnetic radiation is defined as one-billionth of a kilowatt of light is emitted when an atom transitions to a lower energy state is what light is made of has a restricted, maximum energy of 10.2 eV

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Select all of the following that are equal to an impulse of 20 unitsa) force= 5, time= 5.5b) force= 25, time= 0.8c) force= 0.1, time= 200d) force= 10, time= 2(its b, c, and d)(also in order to find answer they have to add to get the unit)ex= 25x.8=20 or .1x200=20