D) provided a recording medium (film) with sensitivity of 100uj/cm2 and a power detector with 10mm of diameter, background measured optical power of 8uw and measured optical power from the laser source of 50uw, determine the exposure time of the recording medium.

In science and physics what is the standard unit of measure for speed?

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton

Asmall electric heater, immersed in 80g of water in a calorimeter of 40j/k raises the temperature from 10.5 degree celsius to 25 degree celsius in 12 minutes. using the same apparatus with 50g of oil instead of water, it is found that the temperature of oil rises from 7 degree celsius to 27 degree celsius in 10 minutes. find specific heat capacity of the oil.