Question

12. A simple pendulum takes 1 minute to complete 30 oscillations. Calculate its time
How many oscillations will perform in 10 s?
13. Bxplain why an electric fuse is called a safety device.
14. Draw a circuit diagram for an open circuit consisting of an electric bulb, electric ce
switch, and connecting wires.
15. State the functions of anteries and veins. Explain why veins have valves while an
16. Explain how the transpiration pull supports the transportation of water in plants.
(2
17. Label the given diagram of the excretory system in humans.
(2​

Answer 1

Answer:

12.it means in 3600sec it complete 30 oscillation

so 3600/30 = 120 so this pendulam takes 120 sec to complete 1 oscillation