Give reasons :
It is easier to read from rough pages than glossy pages .

Give reasons : A carpet is lifted up to remove dust from it .

Give scientific reasons: It is easier to stop a tennis ball as compared to a cricket ball, when both are travelling with, the same velocity.

Give reasons : It is essential to change the tension on the vocal cords, as we produce different sound notes from our larynx.

Give reasons : As the sound wave propagates from one place to the other in air, the air itself is not required to move from one place to the other.

Give reason:C-F bond is stronger than C-Br.

Give scientific reasons: It is easy to swim in a swimming pool than in a river.

Give scientific reasons: If a feather and a stone are released from the top of a building simultaneously, the stone reaches the ground earlier than the feather.

Give scientific reasons: It is necessary to remove harmful and waste substances from the body.

Answer the following : When big grain storage container is required to slide on the ground , it becomes easier if two persons push it rather than one person . When the force is applied by both in the same direction , the movement is easy . You may have experienced this . what do we understand from this example ?