Answer:
<h2>10,000 kg</h2>
Explanation:
The mass of the train can be found by using the formula

k is the kinetic energy
v is the velocity
From the question we have

We have the final answer as
<h3>10,000 kg</h3>
Hope this helps you
C.
Nitrogen has the atomic no. of 7 so the proton and the electron no. is 7.
Three more electrons are needed to fulfil the octet structure: 2,8
Answer:
bottle might burst
Explanation:
because liquid inside will expand and exert pressure on walls of the bottle.
The car's speed is 240km/4hr= 60km/hr.
There's not enough information given in the question to determine its velocity.