Answer:
The shorter train has a length of 600m
Explanation:
The equation of motion of the first train can be written as:
(1)
v' = 108km/h = 30m/s
Furthermore, you can write the equation of motion of the second train as:
= xo + vt (2)
v = 36km/h = 10m/s
where you have taken the initial position as measured from the front of the first train to the front of the second one. l is the length of the second train and 200 the separation of it respect to the first train.
For t = 40 both trains have the same position, that is, x=x'. Then, you equal equations (1) and (2), replace t=40, and solve the equation for l:
Hence, the first train has a length of 600 m
The train behind, or the second train, has twice the length of the first train:
The shorter train has a length of 600m
Solid, liquid, gas and something else
Answer: Mechanical advantage is the measure of the force amplification achieved by using a tool , mechanical device or machine . The machine preserve the input power and supply trade off force. against movement to obtain a desired amplification in the output force .
Explanation: hope this helps
Answer:
numbers
Explanation:
Virtually all unimaginable processes can be described as the movement of certain objects. To analyze and predict the nature of the movements that result from the different kinds of interactions, some important concepts such as momentum, force and energy have been invented. If momentum, force, and energy are known and expressed in a quantitative way (that is, by numbers) it is possible to establish rules by which the resulting movements can be predicted.
Answer:
<em>Valence electron.</em>
Explanation:
<em>The various electrons of an atom are simply classified in 2 types.</em>
They are known as:
Valence electron has the property to hold the outermost shell and carries higher energy level of an atom and the core electron are the type of electron which holds the innermost shell and carries the lowest energy level of an atom.