Asolar cell has an open circuit voltage value of 0.60 v with a reverse saturation current density of jo = 3.9 × 10−9 a/m2 . the temperature of the cell is 27◦c, the cell voltage is 0.52 v, and the cell area is 28 m2 . if the solar irradiation is 485 w/m2 , determine the power output and the efficiency of the solar cell.

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank

Amass weighing 24 pounds, attached to the end of a spring, stretches it 4 inches. initially, the mass is released from rest from a point 8 inches below the equilibrium position. find the equation of motion. (use g = 32 ft/s2 for the acceleration due to gravity.)