Question

How do air bags save lives during car collisions?
How does a cat land on its feet if dropped from an upside-down position?
Why can some insects walk on water, but no mammals can walk on water?
How do hot balloons fly?

Answer 1

Solution:

a) when car collides with another body due to inertia body moves forwards now what air bags does is the prevent they decrease the momentum with which the body moves forward causing less injury.

b) presence of flexible backbone and absence of collarbone makes it possible for a cat to land on its feet if dropped from an upside_down position.

c) they can walk on water because the weight of water displaced by insect is more than the weight of insect. (buoyancy principle.

d) hot balloons fly because the weight of the air inside the balloon is less than the wight of the air displaced by the balloon.