Answer:
The speed of the car when load is dropped in it is 10.90 m/s.
Explanation:
Given that,
Mass of the railroad car, m₁ = 11600kg
Mass of the load, m₂ = 5420kg
It can be assumed as the speed of the car, u₁ = 16 m/s
Initially, it is at rest, u₂ = 0
The additional load is dropped onto the car.
Let v is the speed of the car. It can be calculated using the conservation of momentum as :
So, the speed of the car when load is dropped in it is 10.90 m/s.
I would say b as well. I’m sorry if it’s wrong
The best explanation is:
a. Half-life is a term that describes the time it takes for half of a particle to disintegrate
yes that is true because climate is over a period of time
Answer
Polarization is a method of restricting different plane of transverse waves into the required plane.
Polarization process is done with the help of Polaroids. Polaroids are kept at different angles, these angles are selected according to the wave requirement. Polaroids allows only waves which are aligned to it.
so, this phenomenon is the same in case of polarizing sunglasses as it restricts the unwanted sun waves to pass through it.