<span>The additional energy in a beaker of hot water compared to an otherwise identical beaker of room temperature water is thermal energy.
hope this helps</span>
Answer:
They two waves has the same amplitude and frequency but different wavelengths.
Explanation: comparing the wave equation above with the general wave equation
y(x,t) = Asin(2Πft + 2Πx/¶)
Let ¶ be the wavelength
A is the amplitude
f is the frequency
t is the time
They two waves has the same amplitude and frequency but different wavelengths.
Answer:
a) n = 1.33, b) t = 87 10⁻⁹ m
Explanation:
Part A.
The thin anti-reflection film should create destructive interference for the desired wavelength.
2t sin θ = (m + ½) λₙ
The 2 goes out of the path of the beam inside the film, lam is the wavelength modulated by the refractive index of the film
λₙ = λ₀ / n
2t = (m + ½) λ₀ / n
n = (m+ ½) λ₀/2t
Suppose we are in the first inference m = 0
n = (½ 480 10-9)/ 2 90
n = 1.33
Part B
We do not know the refractive index of the glass explicitly, but in general it is of the order of 1.5, so since the index of the film is lower, there is no phase change.
2t = (m + ½) λ₀ / n
t = 1/4 480 10⁻⁹ / 1.38
t = 87 10⁻⁹ m
<span>When a person lifts the block, the block has more potential energy. Therefore the person does positive work on the block.
work = m g h
work = (4.5 kg) (9.80 m/s^2) (1.2 m)
work = 52.92 joules
The person's work on the block is 52.92 joules
When the block is being raised, the force of gravity opposes the motion. Therefore the force of gravity does negative work on the block.
work = - (force) (h)
work = - m g h
work = -(4.5 kg) (9.80 m/s^2) (1.2 m)
work = -52.92 joules
The work done by the force of gravity on the block is -52.92 joules
Note that when the block is moved horizontally, the potential energy does not change. Therefore there is no work done on the block when it moves horizontally (we are assuming that the kinetic energy does not change).</span>
<span>I think its- Collecting data and analyzing results
Thats what I put.</span>
