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.

An object with a weight of 45 N is thrown into the water. It starts to sink. What can you say about the size of the upthrust force? It is O N It is less than 45 N It is exactly 45 N It is greater than 45 N We don't know anything about the size of the upthrust force

The total energy input to the National Grid from one power station is 34.2 GJ. The National Grid has an efficiency of 0.992 Calculate the useful energy output from this power station to consumers in GJ. [3 marks] Useful energy output = __ GJ

How is geothermal energy generated? Using heat from the ground From the movement of wind By burning fossil fuels From the movement of water From radioactive elements

Step 3/3 When the force doubles, the extension doubles. So the extension at 80 N will be double 8 cm. Use this to predict the extension if the force is 80 N. Enter numper cm

Force on spring (mathrm(N)) & Length of spring (mathrm(cm)) & Extension (mathrm(cm)) 0 & 20 & 0 10 & 22 & 2 20 & 24 & 4 40 & 28 & 8 Look in the table to find the extension if the force is 40 mathrm(~N) .