Physics
When a running car stops suddenly, the passengers tends to lean forward because of:

Inertia of motion
Inertia of rest
Gravitational force
Centrifugal force

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Physics
Two identical solid pieces, one of gold and other of silver, when immersed completely in water exhibit equal weights. When weighed in air (given that density of gold is greater than that of silver)

The silver piece will weigh more
Weighing will depend on their masses
Both silver and gold pieces weigh equal
The gold piece will weigh more

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