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3 years ago

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A flashlight is held at the edge of a swimming pool at a height h = 1.6 m such that its beam makes an angle of θ = 38 degrees wi

th respect to the water's surface. The pool is d = 1.75 m deep and the index of refraction for air and water are n1 = 1 and n2 = 1.33, respectively.
Required:
What is the horizontal distance from the edge of the pool to the bottom of the pool where the light strikes? Write your answer in meters.

1 answer:

slava [35]3 years ago

6 0

one of the answers that i found was 5.83 m i did some more research and it showed the same answer again. good luck with it. hope i was able to help you.

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Why do most carnivores live in forest? given reason

kotegsom [21]

$\huge\purple{Hi!}$

most carnivore live in forest because

They are highly dependent on flesh for their food and therefore their food is easily available in forests.
Small animals live in forests that make it the ideal habitat for carnivores.
Carnivores help in maintaining the herbivore population at a healthy level, by hunting.
It all helps in keeping ecosystems in balance.

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2 years ago

Read 2 more answers

PLEASE I NEED HELP CLICK ON THIS IMAGE

3241004551 [841]

I believe you are incorrect. A weathered mountain would appear more jagged.

I do believe with a lot of exposure to weather will make the mountain appear somewhat more jagged compared to a mountain that is less weathered.

<em>If this is incorrect, please, don't refrain to tell me.</em>

6 0

3 years ago

A student took a calibrated 250.0 gram mass, weighed it on a laboratory balance, and found it read 266.5 g. What was the student

Kruka [31]

Answer:

B. 6.6%

Explanation:

The percentage error of a measurement can be calculated using the formula;

Percent error = (experimental value - accepted value / accepted value) × 100

In this question, the calibrated 250.0 gram mass is the accepted value while the weighed mass of 266.5 g is the experimental or measured value.

Hence, the percentage error can be calculated thus;

Percent error = (266.5-250.0/250.0) × 100

Percent error = 16.5/250 × 100

Percent error = 0.066 × 100

Percent error = 6.6%

7 0

4 years ago

As it travels through a crystal, a light wave is described by the function E(x,t)=Acos[(1.57×107)x−(2.93×1015)t]. In this expres

Drupady [299]

Answer:

Speed, $v=1.86\times 10^8\ m/s$

Explanation:

It is given that,

A light wave is described by the following function as :

$E(x,t)=A\ cos[(1.57\times 10^7)x-(2.93\times 10^{15})t]$ .....(1)

The general equation of wave is given by :

$E=Acos(kx-\omega t)$ ........(2)

On comparing equation (1) and (2)

$k=(1.57\times 10^7)$

$\dfrac{2\pi}{\lambda}=(1.57\times 10^7)$

$\lambda=\dfrac{2\pi}{(1.57\times 10^7)}$

Wavelength, $\lambda=4.002\times 10^{-7}\ m$

$\omega=(2.93\times 10^{15})$

$\dfrac{2\pi}{T}=(2.93\times 10^{15})$

$\dfrac{1}{T}=\dfrac{(2.93\times 10^{15})}{2\pi}$

Frequency, $f=4.66\times 10^{14}\ Hz$

Let v is the speed of the light wave. It is given by :

$v=f\times \lambda$

$v=4.66\times 10^{14}\ Hz\times 4.002\times 10^{-7}\ m$

$v=1.86\times 10^8\ m/s$

So, the speed of the light wave is $1.86\times 10^8\ m/s$ . Hence, this is the required solution.

7 0

3 years ago

Review. A light spring of force constant 3.85 N/m is compressed by 8.00 cm and held between a 0.250-kg block on the left and a 0

vivado [14]

The spring exerts on each block an outward force of magnitude

$\left|\mathrm{F}_{\mathrm{s}}\right|=\mathrm{kx}=(3.85 \mathrm{~N} / \mathrm{m})(0.08 \mathrm{~m})=0.308 \mathrm{~N}$

$Take the $+\mathrm{x}$ direction to the right. For the light block on the left, the vertical forces are given by$

$\mathrm{F}_{\mathrm{g}}=\mathrm{mg}=(0.250 \mathrm{~kg})\left(9.80 \mathrm{~m} / \mathrm{s}^2\right)=2.45 \mathrm{~N}$$ \\and \ $\sum \mathrm{F}_{\mathrm{y}}=0$so $\mathrm{n}-2.45 \mathrm{~N}=0 \rightarrow \mathrm{n}=2.45 \mathrm{~N}$ \\Similarly, for the heavier block,$

$\mathrm{n}=\mathrm{F}_{\mathrm{g}}=(0.500 \mathrm{~kg})\left(9.80 \mathrm{~m} / \mathrm{s}^2\right)=4.90 \mathrm{~N}$

$\begin{aligned}&\sum F_x=m a_x:-0.308 \mathrm{~N}=(0.250 \mathrm{~kg}) \mathrm{a} \\&\mathrm{a}=-1.23 \mathrm{~m} / \mathrm{s}^2\end{aligned}$$\\\\$$ For the heavier block, \\$$+0.308 \mathrm{~N}=(0.500 \mathrm{~kg}) \mathrm{a}$$$$\mathrm{a}=0.616 \mathrm{~m} / \mathrm{s}^2$

<h3>What is kinetic energy?</h3>

The kinetic energy is the energy that it possesses due to its motion.

To accelerate an object, we need to apply force. To apply force, we have to be compelled to do work. When work is done on an object, energy is exchanged, and the object moves with a unused steady speed. We call the energy that's exchanged kinetic energy, and it depends on the mass and speed accomplished.

Kinetic energy is a scalar quantity, it is entirely described by magnitude

To learn more about kinetic energy , visit:

brainly.com/question/11592500

#SPJ4

7 0

2 years ago