No work is done because the object needs to be moved. The formula for work is Work = Force x Distance.
Answer:
In the given equation y=Asin(ωt−kx)
Since, trigonometric function is a dimensionless quantity. So, (ωt−kx)is also dimensionless quantity.
So,
(ωt−kx)=1
ωt=1
[ω]= <u>1</u>=[T] ^−1
[T]
kx=1
[k]= <u>1</u>=[L]^ −1
[L]
The entropy change<span> of the surroundings is driven by heat flow and the heat flow determines the sign of ΔS</span>surr<span>. It can be calculated by the following expression:
</span>ΔSsurr = -(ΔH) / T
We calculate as follows:
ΔSsurr = -13200 / 1337 = 9.87 J/ K mol
Hope this answers the question. Have a nice day.
Answer:
t = 14 s
Explanation:
First, we need to find the acceleration of the meteor by using Newton's s Second Law, as follows:
where,
F = Unbalanced Force = 100000 N
m = mass of meteor = 70 kg
a = acceleration of meteor = ?
Therefore,
a = -1428.57 m/s² (negative sign de to deceleration)
Now, we use general formula of acceleration to find time:
where,
t = time taken = ?
Δv = change in speed = 0m/s - 20000 m/s = - 20000 m/s
Therefore,
<u>t = 14 s</u>