Physics Homework Aid
Physics holds significant importance among the natural sciences, elucidating life's wonders and ranking among the most challenging subjects to master.
QuestionAI is a rich and user-friendly physics problem solver for novice physicists, enabling exploration of atomic properties and interactions, alongside molecular trajectories under various forces. Furthermore, you can delve into the mysteries concealed amidst galaxies with fellow physics enthusiasts. Boldly pose your conjectures and queries to the AI, and authoritative answers will readily emerge.
- Look at the equation below. What units are used for W? Give the full name, not the symbol. Enter your answer W=mtimes g
- The power source provides a current of 1,86 A at a potential difference of 3.90 V Calculate the power of the power source Use the equation: Power=potentaaddifference ast durrent. Choose the correct unit from the box. 13 mark
- When the number of components in a SERIES circuit is INCREASED, what effect does this have on the CURRENT? Adding new components DECREASES resistance, therefore CURRENT INCREASES - VOLTAGE is NOT ALTERED Adding new components INCREASES resistance, therefore VOLTAGE DECREASES - CURRENT is NOT ALTERED Adding new components DECREASES resistance, therefore VOLTAGE INCREASES -CURRENT is NOT ALTERED Adding new components INCREASES resistance, therefore CURRENT DECREASES - VOLTAGE is NOT ALTERED
- 3 What did Franklin's kite experiment prove?
- (d) The student places the cooked potato into the jug of the food processor. The food processor contains a motor that spins blades to chop the potato. The total power input to the motor is 500 mathrm(~W) The useful power output from the motor is 300 mathrm(~W) Calculate the efficiency of the motor in the food processor. Use the equation: [ ( efficiency )=( ( useful power output ))/( ( total power input )) ] Efficiency = (e) The jug is made of plastic with a low thermal conductivity. Explain why this is an advantage. (2) (2)