Question

A bus was moving at a speed of 10 m/s .It suddenly applied a brake to stop the bus. Before coming to rest,the bus covered a distance of 15 cm. If same bus would be moving with speed of 30 m/s and brake would be applied with same retardation ,then distance covered by the bus before coming to rest will be ,​

Answer 1

Answer:

10 Which of the following are correct for the greenhouse effect?

(i) CO2 is mainly responsible for the greenhouse effect.

(ii) The gradual increase in the average temperature of the earth’s atmosphere is

called global warming.

(iii) Methane, nitrous oxide and water vapour are greenhouse gases like CO2.

(iv) An increase in earth’s temperature by as little as 0.5

0C has no effect.

(A) (i), (ii), (iii) (B) (ii), (iii), (iv) (C) (i), (iii), (iv) (D) (i), (ii), (iii),(iv)