First, convert all the km/hr into m/s
You will get that
initial speed = 20 m/s
Initial speed of Green train = 40 m/s
Initial separation = 950 m
Velocity of approach = 20 - -40 = 60 m/s
relative acceleration = -4 m/s^2
v = u + at
0 = 60 - 4t
t = 15s
s = ut + 1/2 *at * t
s = 60 * 15 - 1/2 *4 * 225
s = 900 - 450
Separation when they stop = 450 m
hope this helps
The sun is bigger than the earth, therefore it has more gravitational force than the earth.
Age of dino: Mesozoic era
End of earth a dessert: End of the Mesozoic
a layer: Paleozoic
Answer:
use the kinematics equations and solve for time, after that use dleta dx=Vi*delta time
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It is sufficient in supply and it is produced easily within a relatively short time.
Example are: Solar Energy , Wind Energy, Hydro Energy.