9. A bolt of lightning transfers 28 coulombs of charge through an electric potential difference of 3.2 x 107 volts between a cloud and the ground in 1.5 x 10-3 second. Calculate the average electric current between the cloud and the ground during this transfer of charge

Ineed the answer to question 1 , i’m desperate

Which of the following are appropriate acceleration units?

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?