Which are true for a photon. (Choose 3)
o Energy can be calculated.
o Is the same thing as an electron.
o Is the smallest packet of light.
o Energy cannot be calculated.
o The higher the frequency, the higher the energy. o The higher the frequency, the lower the energy.

Please help

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation , where i is the intensity of a given sound and is the threshold of hearing intensity. what is the intensity, in decibels, [i(db)], when ? use a calculator. round to the nearest whole number. 8 9 19 80

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

Aphase diagram assumes is kept constant.