A solar cell has a short circuit current density of 30 mA cm2 and opern circuit voltage of 0.60 V under one-sun illumination at room temperature Use the ideal diode equation to calculate the open circuit voltage which is expected under illumination by 100 suns, stating any assumptions made. In practice an open-circuit voltage of 0.66 V is measured. Compare this with your result and suggest reasons for any discrepancy.

Ahockey player of mass 82 kg is traveling north with a velocity of 4.1 meters per second he collides with the 76 kg player traveling east at 3.4 meters per second if the two players locked together momentarily in what direction will they be going immediately after the collision how fast will they be moving

Aspring that is stretched 2.6 cm stores a potential energy of 0.053 j. what is the spring constant of this spring?

Auniform electric field exists in the region between two oppositely charged plane parallel plates separated by a distance of 1.60 cm . a proton is released from rest at the surface of the positively charged plate and strikes the surface of the opposite plate in a time interval of 3.20×10-6 s. 1-find the magnitude of the electric field. use 1.60×10-19c for the magnitude of the charge on an electron and 1.67×10-27kg for the mass of a proton 2-find the speed of the proton when it strikes the negatively charged plate