Answer:
all qn 1,2,3 have same answer ,. Yes,. hope it helps
Answer:
The velocity of the truck after the collision is 20.93 m/s
Explanation:
It is given that,
Mass of car, m₁ = 1200 kg
Initial velocity of the car, 
Mass of truck, m₂ = 9000 kg
Initial velocity of the truck, 
After the collision, velocity of the car, 
Let
is the velocity of the truck immediately after the collision. The momentum of the system remains conversed.




So, the velocity of the truck after the collision is 20.93 m/s. Hence, this is the required solution.
Answer:
The charge stored in a parallel plate capacitor is proportional to the potential, and capacitance across the plates.
Explanation:
The capacitance of a parallel plate capacitor is given by:

where
Q is the charge stored
V is the potential difference across the capacitor
Re-arranging the formula, we get

From this expression, we see that the charge stored (Q) is proportional to both the potential (V) and the capacitance (C).