Answer:
Because in higher altitudes atmospheric pressure is low
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
Answer:
Disambiguation
Explanation:
Fg is an abbreviation used in physics to describe the amount of force exerted by gravity on an object, normally represented in units such as the newton.
Answer: Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
Explanation: