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4 years ago

2appementum.com assessments delivery/ua/mt/launch/48884439/45315872/aHkucrVIOLY-

Physics

1 answer:

satela [25.4K]4 years ago

3 0

Answer:

Bulb

Explanation:

Bulb and fluorescent tubes convert electrical energy into light energy. The best alternative in this case will be a bulb. The switch controls flow of current hence used to put the circuit on and off but doesn't do any conversion.

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Mr. MacDougall got his vehicle stuck in the snow. Being the nice student that you are, you stop to help Mr. MacDougall out of th

zhannawk [14.2K]

Answer:

Explanation:

work done=force*displacement

=350N*15m

=5250 joule

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3 years ago

(n = 1.33). When visible light (400nm – 700 nm) shines normally on the film an observed from above, the bright reflected light l

Yuki888 [10]

Complete Question

A thin film in air is made by putting a thin layer of acetone (n = 1.25) on a layer of water

(n = 1.33). When visible light (400 nm – 700 nm) shines normally on the film an observed from above, the bright reflected light looks kind of “purplish” with red light of wavelength 650 nm mixed some blue giving it that appearance and “greenish” light of wavelength 520 nm is completely destroyed. Determine the thickness of the acetone film. (you only need to worry about the red and green wavelengths, not the blue)

Answer:

The thickness of acetone is $d = 104 nm$

Explanation:

A diagram showing this process is shown on the first uploaded image

From the question we are told that

The refractive index of acetone is $n_a =1.25$

The refractive index of water is $n_w = 1.33$

The wavelength of the reflected light is $\lambda_r = 650nm = 650 *10^{-9}m$

The wavelength of the destroyed light is $\lambda_g = 520nm = 520 *10^{-9}m$

Looking at the given data we can see that the

$n_a < n_w$

This means that the light which the acetone-water layer would reflect will have a phase shift of $\pi$

Again this make us to understand that the light reflected at the acetone layer will also have a phase shift of $\pi$

Since they would be having the same phase shift the two light would interfere

For interference the condition for minima is mathematically represented as

$2 n_a d = (m + \frac{1}{2} ) \lambda_g$

Where d is the thickness of acetone

$d = \frac{\lambda_g}{4 n_a}$

Substituting values

$d = \frac{520 *10^{-9}}{4 * 1.25}$

$d = 104 *10^{-9}m$

$d = 104 nm$

5 0

3 years ago

What is the pressure inside such a balloon (in atm) if it starts out at sea level with a temperature of 12.8°C and rises to an a

tatiyna

Answer:

The final pressure inside the balloon will be $P_2=0.0359\ atm$ .

Explanation:

Given initial temperature of the balloon is $T_1=12.8\°C$

And the final temperature of the balloon is $T_2=-47.7\°C$

Initially, the balloon is at atmospheric pressure $P_1=1\ atm$ and volume be $V_1$

And the final pressure in the balloon is $P_2$ and the volume be $V_2$

Also, it is given in the question that the final volume became twenty-two times the original volume.

We can write $V_2=22V_1$

Now, using ideal gas equation.

$\frac{P_2V_2}{P_1V_1}=\frac{nRT_2}{nRT_2}$

Where, $R$ is the gas constant. And $n$ is moles of substance inside the balloon.

In our problem the value of $n$ will be the same for both cases. Also, $R$ is the gas constant.

$\frac{P_2V_2}{P_1V_1}=\frac{T_2}{T_1}$

Also, we have $V_2=22V_1$ from the question.

$\frac{P_2\times 22V_1}{P_1V_1}=\frac{T_2}{T_1}\\\\\frac{P_2\times 22}{P_1}=\frac{T_2}{T_1}$

We need to convert the temperature from $\°C$ to Kelvin.

$T_1=12.8\°C\\T_1=12.8+273.15=285.95\\T_2=-47.7\°C\\T_2=-47.7+273.15=225.45$

Plug these values we get,

$\frac{P_2\times 22}{1}=\frac{225.45}{285.95}\\\\22\times P_2=0.789\\P_2=\frac{0.789}{22}\\P_2=0.0359\ atm.$

So, the final pressure inside the balloon will be $P_2=0.0359\ atm$ .

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4 years ago

Un objeto que tiene como masa 80 kg acelera a razón de 10 m/s2 ¿que fuerza lo impulzo

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Answer:

What

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3 years ago

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For each of the following, draw the resulting wave when the two pulses occupy the same space. Unless otherwise noted, each wave

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Answer:

Explanation:

because it is are of circle

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4 years ago