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.
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Here are the solutions to the remaining objective questions: Question 22: A body stands infront of a tall wall and produces a sound. If he hear the echo 3s later. Calculate his distance from the wall (V = 330ms⁻¹) Given: Total time for echo t = 3 s, Velocity V = 330 m/s. The time for the sound to travel one way to the wall is half of the total time: t_one-way = (t)/(2) = 3 s2 = 1.5 s Calculate the distance d using the formula d = V × t_one-way: d = 330 m/s × 1.5 s = 495 m The correct answer is (a) 495m. Question 23: How far from a hill should a boy stand in order to hear the echo of his clap 1.6s later (V = 340ms⁻¹) Given: Total time for echo t = 1.6 s, Velocity V = 340 m/s. The time for the sound to travel one way to the hill is half of the total time: t_one-way = (t)/(2) = 1.6 s2 = 0.8 s Calculate the distance d using the formula d = V × t_one-way: d = 340 m/s × 0.8 s = 272 m The correct answer is (a) 272m. Question 24: An optical instrument that uses a converging lens to form a real image is A camera uses a converging lens to form a real image on a film or sensor. The correct answer is (d) camera. Question 25: ______ collects and focuses light. A lens is the component specifically designed to collect and focus light. The correct answer is (b) Lens. Question 26: ______ records the image. In a traditional camera, the film records the image formed by the lens. The correct answer is (a) Film. That's 2 down. 3 left today — send the next one.