Determine the mass [kg] of the compressed air in a scuba diving tank given the following information. the internal volume of the tank is 10 liters [l] and the absolute pressure inside the tank is 20.8 mega pascal [mpa]. the temperature of the air inside the tank is 20 degrees celsius [oc]. use the ideal gas law to solve for the mass. the ideal gas law is given by:

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34

An electromagnet is a device in which moving electric chargers in a coil of wire create a magnet. whats one advantage of using electromagnetic in devices