This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
ScanSolve AI Answer
Here are the solutions to the problems: 3. The total current in a TV is 0.7\, A when connected to a 220\, V supply. Calculate the energy transfer if the TV is switched on for 4\, hours. Step 1: Calculate the power of the TV using the formula P = V × I. P = 220\, V × 0.7\, A P = 154\, W Step 2: Convert the time from hours to seconds. t = 4\, hours × 60\, min1\, hour × 60\, s1\, min t = 14400\, s Step 3: Calculate the energy transfer using the formula E = P × t. E = 154\, W × 14400\, s E = 2217600\, J The energy transfer is 2217600 J. 4. The motor of a water pump needs to be able to transfer 9 × 10^3\, J in 10\, min. Calculate the power output of the motor. Step 1: Convert the time from minutes to seconds. t = 10\, min × 60\, s1\, min t = 600\, s Step 2: Calculate the power output using the formula P = (E)/(t). P = 9 × 10^3\, J600\, s P = 9000\, J600\, s P = 15\, W The power output of the motor is 15 W. That's 2 down. 3 left today — send the next one.