SEETA HIGH WORKSHOP QUESTIONS.pdf

ripples. c. Explain what distorted the waves and how it could have been reduced. d. Explain why the yellow sheet changed color when the red lights were switched on. 3. The students in a particular class visited a laboratory with a white bulb and a red one, to observe a glass tank filled with water with a white base at the bottom. Modifications were made to create a shallow end on one side of the tank using glass material. To their surprise, when they struck the water's surface at the shallow end with a long rectangular rod at a frequency of 80 Hz, they noticed that the spacing between successive crests changed from 2.5cm to 5cm. Additionally, they were disturbed by the distortion of ripples as they struck the tank walls. They were also surprised to see the base turning black when it was replaced with a yellow sheet and the red lights switched on. Hint; the glass tank would break if the velocity of the waves that hit it is greater than 20 ms-1 (a) Support the view that the mineral is radioactive. (b) Use the graph to estimate its half-life (c) Explain the best way of storing this rare mineral. (d) What are the dangers of exposing this mineral to the public 2. An article in the newspaper gave information that on 2nd December 2022, Ugandan engineers with the help of Japanese engineers launched a satellite. The literature teacher who picked interest in the article found new words like artificial and natural satellites. He developed a number of unanswered questions which could be