Answer:
The tension in the cable is 18371.9 newtons.
Explanation:
Physically speaking, the tension can be calculated with the help of the Second Newton's Law. The upward acceleration means that magnitude of tension must be greater than weight of elevator, whose equation of equilibrium is described below:
Where:
- Tension in the cable, measured in newtons.
- Mass of the elevator, measured in kilograms.
- Gravity constant, measured in meters per square second.
- Net acceleration of the elevator, measured in meters in square second.
Now, tension is cleared and resultant expression is also simplified:
If , and , the tension in the cable is:
The tension in the cable is 18371.9 newtons.
Answer:
<em>The most constructive reflected wavelength would be 576.8 nm</em>
Explanation:
Given the thickness of oil t = 103 nm
refractive index n = 1.41
The refractive index is related to wavelength in a particular medium with the relationship below;
λ =λ / n ...............1
here λ is the wavelength in the medium (oil)
λ is the wavelength of light in vacuum
n is the refractive index
most constructively reflected wavelength will occur at the point of Most constructive interference, which is at;
2 t = λ / 2 .........1
Substituting the value that we have for λ in equation 1 into equation 2
2 t = (λ / n)/2
4t = λ / n
λ = 4nt
λ = 4 x 1.41 x 103 nm
λ = 576.8 nm
Therefore the most constructive reflected wavelength would be
576.8 nm
The formula written in the 3rd line above the picture is WRONG. Don't use it. Use the formula the way it's printed in the picture.
V = d / t
That means Speed = (distance) / (time)
The question tells us that v = 330 m/s
So you write 330 m/s in the equation in place of 'v', like this:
330 m/s = (distance) / (time)
The question also tells us that the time is 0.4 second
So you write 0.4 sec in place of 'time', like this:
330 m/s = (distance) / (0.4 second)
Finally, you take this, and multiply each side of the equation by (0.4 sec). Then it'll say
distance = (330 m/s) x (0.4 second)
As soon as you do that one single multiplication there with your pencil or your calculator, you'll have the distance.
This is either the 2nd or 3rd time you've posted this same exact question since last weekend. It can be solved THIS time exactly like the answers that were posted those other times.
The DOT in the picture is marked for the wrong choice. Use the formula that's printed in the picture, not copied above it.
The answer is true any machine which moves an object does produce work