Which factors describe a gas
1 answer:
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The canoe is moving at 14.1 m/s to the right after the collision.
Explanation:
According to the law of conservation of momentum, in absence of external forces the total momentum of the system must be conserved before and after the collision. So we can write:
where:
is the mass of the canoe
is the initial velocity of canoe (we take right as positive direction, and since the canoe is moving to the left, its velocity is negative)
is the final velocity of the canoe
is the mass of the raft
is the initial velocity of the raft
is the final velocity of the raft
Re-arranging the equation and substituting the values, we find: the final velocity of the canoe:
So, the canoe is moving at 14.1 m/s to the right after the collision.
Learn more about momentum:
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1) Fundamental units of are
2) Fundamental units of are
Explanation:
The equation for the variable is
where we have:
measured in
measured in
measured in
measured in
We can re-write the equation as
And we notice that the units of the term on the left must be equal to the units of the term on the right.
This means that:
1) First of all, must have the same units of
. So,
However, both ft (feet) and in (inches) are not fundamental dimensions: this means that they can be expressed as meters. Therefore, the fundamental units of are
2)
The term must have the same units of
in order to be added to it. Therefore,
We also know that the units of are
, therefore
And so, the fundamental units of are
However, the Joules can be written as
Therefore
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