Question
Name the leucocytes that increase in number during worm infestations.
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What is the kinetic energy of a body of mass 1kg moving with a speed of 2m/s?
A man standing 825 metres away from a cliff (steep rock) fires a gun. After how long will he hear its echo? Speed of sound in air is 33m/s.
Two bodies A and B of equal masses are kept at heights of h and 2h respectively. What will be the ratio of in their potential energies?
Write down four main characteristics of good cattle shelter.
Why is life on Mars and Venus planets not possible?
What is meant by the ‘loudness’ of sound? On what factor does the loudness of a soind depend?
Calculate the number of neutrons present in the nucleus of an element X which is represented as $^{31}_{15}\text{X}.$