a body of mass x suspended at the 15cm mark of a ruler balanced it at the 30cm mark on a pivot . If the ruler has a mass of 36g and its centre of gravity is at 55cm mark, calculate the mass x and the distance point if the ruler from the zero end when the body is moved to the 25cm mark​

Solar cell a produces 100 joules of energy, when a light source is shown on it for 3 minutes. solar cell b produces 200 joules of energy when the same light source is shown on it for 5 minutes. which solar cell works better? a) solar cell b, because it produces more energy. b) solar cell b, because it generates more power. c) solar cell a, because it produces energy quicker. d) solar cell a, because it generates a greater wattage. eliminate

Which type of wave can travel without a medium

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?