Answer
given,
Mass of Kara's car = 1300 Kg
moving with speed = 11 m/s
time taken to stop = 0.14 s
final velocity = 0 m/s
distance between Lisa ford and Kara's car = 30 m
a) change in momentum of Kara's car
Δ P = m Δ v


Δ P = - 1.43 x 10⁴ kg.m/s
b) impulse is equal to change in momentum of the car
I = - 1.43 x 10⁴ kg.m/s
c) magnitude of force experienced by Kara
I = F x t
I is impulse acting on the car
t is time
- 1.43 x 10⁴= F x 0.14
F = -1.021 x 10⁵ N
negative sign represents the direction of force
The function of concrete shielding in a nuclear reactor is: <u>to contain radiation.</u>
<u>Explanation</u>:
The reactor core in the nuclear reactor is placed in a steel pressure vessel. The steel vessel is then shielded by a thick layer of concrete. The concrete shielding is done to protect the workers from radiation.
The nuclear power station must be built on hard solid rock as the reactor is heavy in structure. The radiation emitted from the reactor may harm the human being. To avoid this, the concrete shield is made to prevent the emission of radiation.
Answer:
Heres the link!
Explanation:
https://www.bbc.co.uk/news/science-environment-56491033