<span>122 g * 4,186 (j/g*°c) * 23°c = 11745.916 j </span>
The answer is D. The input force is equal to the output force.
I just did test and got it right
Answer:
mowing a lawn
Explanation:
Entropy is the degree of disorderliness of a system. As a body moves from a more ordered state to a less ordered one, the entropy of the system increases.
- Mowing a lawn is a typical example of increasing entropy.
- When a lawn is being mowed, the grasses becomes disordered without any fixed orientation.
- Folding a clothe is trying to bring orderliness to the clothe patterning.
- Washing dishes will make one arrange them in an ordered way.
- Falling leaves brings leaves together.
Answer:
Approximately
to the right (assuming that both astronauts were originally stationary.)
Explanation:
If an object of mass
is moving at a velocity of
, the momentum
of that object would be
.
Since momentum of this system (of the astronauts) conserved:
.
Assuming that both astronauts were originally stationary. The total initial momentum of the two astronauts would be
since the velocity of both astronauts was
.
Therefore:
.
The final momentum of the first astronaut (
,
to the left) would be
to the left.
Let
denote the momentum of the astronaut in question. The total final momentum of the two astronauts, combined, would be
.
.
Hence,
. In other words, the final momentum of the astronaut in question is the opposite of that of the first astronaut. Since momentum is a vector quantity, the momentum of the two astronauts magnitude (
) but opposite in direction (to the right versus to the left.)
Rearrange the equation
to obtain an expression for velocity in terms of momentum and mass:
.
.
Hence, the velocity of the astronaut in question (
) would be
to the right.