The springs of a 1500-kg car compress 5.0 mm when its 68-kg driver gets into the driver’s seat. If the car goes over a bump, what will be the frequency of vibrations?

Solution Step 1 List out the variables. -3 Power output of electrical energy delivered by the photovoltaic cell, P Electrical 10 W Then, the power input by light energy for illumination of photovoltaic cell which will deliver 4.0 10 W of power as electrical energy is, P = 1.2 10 W Light But, the provided values are in ‘ watts’. The unit, W = joules / second = J/s -3 So, we can tell that, 4.0 10 J of electrical energy is produced in a second by a photovoltaic cell while illuminating by 1.2 10 J light energy for one second. We have to calculate the efficiency of photovoltaic cell here.