The pitch of a sound depends on its ____.
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A lemon kept in water in a glass tumbler appears to be bigger than its actual size when viewed from the sides. This is because of
Chlorophyll was first isolated and named by
Who discovered Pluto?
The _________ keeps the average temperature of the Earth fairly steady.
First human who got married in space is
Which of the following is NOT an effect of Noise Pollution?
If a chord of a circle subtends an angle of 30° at the circumference of the circle, then what is the ratio of the radius of the circle and the length of the chord respectively?