The total momentum before and after the collision must be conserved.
The total momentum before the collision is:
where m1 and m2 are the masses of the two players, and
and
their initial velocities. Both are considered with positive sign, because the two players are running toward the same direction.
The final momentum is instead
because now the two players are moving together with a total mass of (m1+m2) and final speed vf.
By requiring that the momentum is conserved
we can calculate vf, the post-collision speed:
and the direction is the same as the direction of the players before the collision.
Answer:
D- Used to power turbines and generators
Explanation:
The nuclear fission takes place inside the core comprises fuel assemblies. Hence the heat produced is used to power turbines and generators.
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Releasing any species into an environment it's not adapted to, or native to is dangerous because the species lacks the necessary adaptations to survive in the environment.
In the example of the frog, releasing it into a grassland would be a bad idea because the frog needs not only a "moist" area to thrive but it needs places to hide and plenty of insects to feed off of. Also, for reproduction it would need a pond, or some kind of water source!
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Answer:
, assuming that there's no heat exchange between the washing machine and the environment.
Explanation:
Let denote the mass of water and the specific heat capacity of water. The energy required to raise the temperature of that much water by would be:
.
Washing at would require a temperature change of .
Washing at would require a temperature change of .
In both situations, while .
Calculate the energy required in either situation:
Washing at :
.
Washing at :
.
.
INCREASE in temperature of the material practically increase the energy of the particles. which increases their motion due to increase in energy . thus when the temperature is decreased the energy level decreases which causes the particle's motion to slow down.. the motion of the particle is highly reduced when the temperature is lowered