Name two energy sources that you would consider to be renewable. Give reasons for your choices.

Give the names of two energy sources that you would consider to be exhaustible.Give reasons for your choices.

Name two natural sources of hydrocarbons.

Name any two good sources of vitamin A.

Modern telescope prefer using mirrors over using suitable lenses. Give two reasons for this.

Suppose you have two forces pand p. How would you combine them in order to have resultant force of magnitudes (a)zero (b) 2_barF and barF ?

State if each of the following statements is true or false. Give reasons for your answer In an elastic collision of two bodies, the momentum and energy of each body is conserved.