Answer:
<h2>
187,500N/m</h2>
Explanation:
From the question, the kinectic energy of the train will be equal to the energy stored in the spring.
Kinetic energy = 1/2 mv² and energy stored in a spring E = 1/2 ke².
Equating both we will have;
1/2 mv² = 1/2ke²
mv² = ke²
m is the mass of the train
v is the velocity of then train
k is the spring constant
e is the extension caused by the spring.
Given m = 30000kg, v = 4 m/s, e = 4 - 2.4 = 1.6m
Substituting this values into the formula will give;
30000*4² = k*1.6²
The value of the spring constant is 187,500N/m
Both hemispheres are warmer in their Spring than they are
in their Winter, because . . .
A). the sun climbs higher in the sky during Spring than it does during
WInter ... shooting its rays more directly at the ground ...,
and
B). the sun stays up in the sky longer in Spring than it does in
Winter, giving the ground more time to absorb its rays.
A derived quantities is terms of the 7 base quantities via a system of quantity equations which are called SI derived units.
Answer : The best pressure is 110 GPa of the lower mantle.
Explanation : We know that the pressure in the lower mantle starts at 24 GPa and reach a 136 GPa at the boundary.
So, the best pressure is 110 GPa because 220 GPa, a 305 GPa and 360 GPa are the higher value of the maximum value 136 GPa of the lower mantle.
Well the heat that is needed to raise the temperature of 10g of water by 17oC is 7
