Question : A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that:

Option 1: The rubber ball suffers a greater change in momentum

Option 2: The metal ball suffers a greater change in momentum

Option 3: Both suffer the same change in momentum

Option 4: The initial momentum of the rubber ball is greater than that of the metal ball

Question : Metal tea pots have wooden handles because:

Option 1: wood is bad conductor of heat

Option 2: it prevents electric shock

Option 3: it gives beauty to the pots

Option 4: it is hygenic

Question : Air is said to be saturated when -

Option 1: It contains the maximum content of water vapour.

Option 2: Its pressure is minimum.

Option 3: Its thickness is maximum.

Option 4: It blows over the barren land.

Question : If $\sin (\theta+30°)=\cos 5 \theta$, then what is the value of $\theta$?

Option 1: 30°

Option 2: 10°

Option 3: 15°

Option 4: 20°

Question : If $2a+3b=14$ and $2a-3b=10$, then find the value of ' $ab$ '.

Option 1: 5

Option 2: 3

Option 3: 4

Option 4: 2