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 answers to your questions: 2. a) The experiment proves that oxygen is necessary for combustion (burning). 2. b) The candle flame went off in B because the oxygen inside the bell jar was consumed during the burning process, and there was no further supply of oxygen to sustain the flame. 2. c) The level of water rose inside the bell jar B because as the candle burned, it consumed the oxygen gas inside the jar. This reduced the amount of gas and thus the pressure inside the bell jar. The higher atmospheric pressure outside then pushed the water up into the jar to equalize the pressure. 2. d) The gas that builds up inside B when the candle stops burning is carbon dioxide (CO_2). 3. a) A magnet is a material or object that produces a magnetic field. This field exerts a force on other magnetic materials (like iron, nickel, and cobalt) and on other magnets, causing attraction or repulsion. 3. b) To make an experiment to show the lines of force of a magnet: i) Place the bar magnet* on a flat surface. ii) Place the white paper* over the bar magnet. iii) Gently and evenly sprinkle the iron filings* over the white paper. iv) Gently tap the paper a few times. The iron filings will arrange themselves in a pattern that reveals the magnetic field lines* around the magnet. 4. To show that magnetism can pass through non-magnetic materials: i) Place the small pins* on a flat, non-magnetic surface (e.g., a table). ii) Place the piece of plastic* (the non-magnetic material) over the pins, ensuring it completely covers them. iii) Hold the bar magnet* above the plastic, directly over the pins, without touching the plastic. iv) Move the magnet around. Observe that the pins underneath the plastic move along with the magnet. This demonstrates that the magnetic force from the bar magnet passes through the non-magnetic plastic to attract and move the pins.