Answer: The correct answer is option (A).
Explanation:
Momentum of the car with 0.04 kg mass , which travelling with velocity of 2.00 m/s
Then the maximum speed of the another car in order to not to break the eggs will be same as first car:
Speed slightly more than 1 m/s will increase the momentum of second car and the eggs will break. So, from the given options the minimum speed need by the second car will be 1.42m/s.
Explanation:
So what's the question here?
B or c
It’s kinda confusing
The resistance of a wire is given by
where
is the resistivity of the material, L the length of the wire and A its cross-sectional area.
In the problem,
and L remain the same, while A changes because the radius changes. The area is given by:
This means that if we double the radius (2r), the area becomes
And therefore, the new value of the resistance is
So, when the radius is doubled, the resistance becomes
of its original value.
