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.
- a runs at a speed of 15m/s and stores 96000 J of kinetic energy. ite the mass of the zebra in kg , giving your answer to 2 significant f
- The velocity-time graph for a cycle is shown. a) Work out the distance travelled on the cycle in the first 14 seconds. b) Work out the acceleration in the first 4 seconds.
- The density of a cylinder is 1.25g/cm^3 The cylinder has mass 0.5 kg and radius 3 cm. Work out the height of the cylinder.
- What I need to know Before answering a 6-mark question, you should always think about the information you need to know to answer it. The table below states the things you need to be able to do to answer the question. You might not know how to answer all of them yet. Tick the box for the answers you know, and write your answer in the answer box. multicolumn(1)(|c|)( Learning objective ) & checkmark & State what an electromagnet is. & & Describe how to measure and change the current of a circuit. & & Explain how to test the strength of an electromagnet. & & Explain three ways to change the strength of an electromagnet. & & Key words
- 13. Does a gas discharge tube filled with boron emit the same wavelengths of light as a tube filled with hydrogen? Use evidence from Model 2 to support your answer. 14. "The spectral lines for atoms are like fingerprints for humans." How do the spectral lines for hydrogen and boron support this statement? Circle the appropriate word to complete each statement in Questions 14-17 15. Electrons and protons (attract/repel) each other. 16. As an electron gets closer to the nucleus the (attraction/repulsion)to the nucleus gets (stronger/ weaker). 17. For an electron to move from an energy level close to the nucleus to an energy level far from the nucleus it would need to (gain/lose energy. 18. For an electron to move from an energy level far from the nucleus to an energy level close to the nucleus it would need to (gain/lose)energy. Niels Bohr modified Rutherford'Nuclear Atom model to explain how light interacted with the electrons in an atom to produce spectral lines. His model included electrons orbiting the nucleus at specific energy levels. Electrons absorb energy from various sources (electricity) when they move from lower energy levels (ground state) to higher energy levels (excited states). Energy is released as electrons return to their lower energy levels. Is energy absorbed or released for the electron transition shown in the diagram to the right? Explain.