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.
- 2. The density of iron is 7.87g/mL In the lab, a student found three values for the density of iron: 8.45g/mL,8.39g/mL and 8.42g/mL Describe the accuracy and precision of this experiment.
- 8) A runner ran a 600 m race in 2 min 17 seconds Calculate his average speed in m/sec S=Ddiv T underline ( )m/sec
- Some smoke detectors make use of radiation which is very easily stopped by tiny smoke particles moving between the radioactive source and the detector. square square The most suitable type of radioisotope for a smoke detector would be A an alpha-emitter with a long half-life B a gamma-emitter with a short half-life C an alpha-emitter with a short half-life D a gamma-emitter with a long half-life.
- You observe a ball that moves (33.6pm 0.2)cm in (11.49pm 0.02)s . What is the observed speed of the ball (best estimate and most probable uncertainty)? (speed=distance/time) (1.62pm 0.01)cm/s (1.739pm 0.005)cm/s (2.92pm 0.01)cm/s (2.92pm 0.02)cm/s (1.619pm 0.008)cm/s
- A remote village in the UK uses a hydroelectric generator to provide electricity. In one day, 2500 000 kg of water passes through the hydroelectric generator. The change in gravitational potential energy of the water is 367.5 MJ. gravitational field strength=9.8N/kg Calculate the mean change in vertical height of the water as it moves through the hydroelectric generator. Use the Physics Equations Sheet. [4 marks __