Physics
An object at rest will remain at rest and an object in motion will remain in motion until and unless it is acted upon by an external force. This is Newton's

Third law
First law
Second law
Fourth law

ANSWER DOWNLOAD EXAMIANS APP

Physics
Stars twinkle because

the refractive index of the different layers of the earth's atmosphere ch
the distance of the stars from the earth changes with time.
None of these
the intensity of light emitted by them changes with time.

ANSWER DOWNLOAD EXAMIANS APP

Physics
Should cars have bumpers that collapse under impact?

No, since the colliding car would then ram into the occupants and kill them
Yes, since the offending car should get damaged and pay for the mistake
Yes, since they help to absorb the impact of a collision and keep the occupants safe
No, since it would be very expensive to get the car repaired

ANSWER DOWNLOAD EXAMIANS APP

Physics
In total internal reflection, the light travel from

Rarer to denser medium and it occurs with loss of intensity
Denser to rarer medium and it occurs with loss of intensity
Denser to rarer medium and it occurs with no loss of intensity
Rarer to denser medium and it occurs with no loss of intensity

ANSWER DOWNLOAD EXAMIANS APP