Question
How is wind helpful to Earth?
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Answer
Wind is the fastest growing source of electricity in the world. It's often one of the least expensive forms of renewable power available. Some experts say it can sometimes be the cheapest form of any kind of power. Generating power from the wind leaves no dangerous waste products behind. Best of all, its supply is unlimited.
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→In an experiment, Riya uses a pendulum of different lengths to observe time periods.
Q.1. What happens when the length increases?
(a) Time period decreases
(b) Time period increases
(c) No change
(d) Speed increases
Q.2. Which factor affects the pendulum's time period most?
(a) Mass$\quad$(b) Shape
(c) Length$\quad$(d) Material
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