A ray of light bends upon entering a new medium. What is this phenomenon called?

Answers

Answer 1

Answer:

Answer:

Refraction

Explanation:

Refraction is a phenomenon which results when a ray of light enters from one medium to another medium. The speed of light in a medium slows down. It depends upon the optical density of the medium which is given by refractive index.

When a ray of light enters from rarer medium to denser medium, it bends towards the normal.

When a ray of light enters from denser medium to rarer medium, it bends away from the normal.

The laws of refraction are:

The incident ray, the refracted ray and the normal all lie in the same plane.

$(sin i)/(sin r)=(n_2)/(n_1)$

This is Snell's law. i is the angle of incidence, r is the angle of refraction, n₁ is the refractive index of medium 1 and n₂ is the refractive index of the medium 2.

Answer 2

Answer: Ii believe it's a refraction

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Use newton's first law of motion to explain why you feel tossed around whenever a roller coaster goes over a hill or through a loop.

Answer to number 8 please

Answers

Acceleration = (change in speed) / (time for the change)

(Note: That's all the Physics there is to this problem.
The rest is all arithmetic.)
=======================================

change in speed = (40 - 20) miles/hour = -20 miles/hour
time for the change = 10 minutes

Acceleration = (-20 miles/hour) / (10 minutes) =

-2 miles/hour per minute .

That's a perfectly good and technically correct expression for acceleration.
But obviously the units might make some people dizzy. So let's try to
clean it up a little.

Notice that 10 minutes is 1/6 of an hour.
So we could write the acceleration as

Acceleration = (-20 miles/hour) / (1/6 hour) = -120 miles/hour per hour =

-120 miles/hour² .

You could convert this into any units you like. It's really not a physics problem
any more, it's just an exercise in converting units.

First segment: The airplane is descending slowly, with time and distance at a 3:1 ratio. It is probably approaching the airport

Second segment: The airplane is maintaining its altitude. It is probably waiting for the other planes to clear away

Third segment:The airplane descending rapidly, with time and distance at a 1:2 ratio. It is probably landing

Sorry, my bad.
To find acceleration, we use v2-v1 /t
40mph - 20mph / 10 min
20mph/10min
We can convert this to 20/6 miles per 10 minutes, and cancel out the 10 min to 20/6 miles, which is 10/3 miles

Why do sound waves move faster through the ground than through the air?Particles of matter are packed more loosely in the ground than in the air.

Particles of matter are packed more tightly in the ground than in the air.

Air doesn’t contain any particles of matter to transmit sound waves.

The elevation of the ground is lower than the elevation of the air space.

Answers

Answer:

Particles of matter are packed more tightly in the ground than in the air.

Explanation:

As we know that velocity of sound in a given medium is given by formula

$v = \sqrt{(E)/(\rho)}$

here we know that

E = elasticity of the medium

$\rho$ = density of the medium

now we know that if we increase the density of medium then particles of matter are packed more which will decrease the speed of wave.

while is particles are tightly packed then it will increase the elasticity of the medium

So here if all particles are tightly bounded with each other then sound waves will move faster through the medium

Particles of matter are packed more tightly in the ground than the air

What is the unit of measurement for power?A. m/s2
B. watts
C. joules
D. newtons

Answers

Power is the rate of doing work or using energy.

The unit of power is the watt.

1 watt = 1 joule per second

The balanced half-reaction in which dichromate ion is reduced to chromium metal is a ________ process. a. two-electron b. six-electron c. four-electron d. three-electron e. twelve-electron

Answers

Answer:

The balanced half-reaction in which dichromate ion is reduced to chromium metal is a six-electron process.

Explanation:

The dichromate ion (Cr2O72-) has an oxidation state of +6, while chromium metal has an oxidation state of 0. So, 6 electrons must be transferred from the dichromate ion to chromium metal for the reduction to occur.

Which of the following colors is associated with the lowest temperature? Explain your reasoning.A. Blue
B. Green
C. Yellow
D. Red

Answers

In general, A. Blue is associated with the lowest temperature because the light carries the least amount of energy when emitted, meaning that it can't "heat things up" as quickly.

Blue is associated with a low temperature.

At 400 K, a volume of gas has a pressure of 0.40 atmospheres. What is the pressure of this gas at 273 K?

Answers

The pressure of the sample of gas at 273 K is equal to 0.273 atm assuming the volume is constant.

What is Gay Lussac's law?

Gay-Lussac's law can be described as that when the volume of the gas remains constant then the pressure (P) of the gas and the absolute temperature (T) in a direct relationship.

Gay Lussca's law can be described as mentioned below:

P/T = k

The pressure of gas is directly proportional to absolute temperature of the gas.

P ∝ T ( Volume of gas is constant)

or, P₁/T₁ = P₂/T₂ .................(1)

Given, the initial temperature of the gas, T₁ = 400 K

The final temperature of the gas, T₂ = 273 K

The initial pressure of the gas, P₁ = 0.40 atm

The final pressure of the given gas can be calculated from Gay Lussac's law as:

$\displaystyle P_2 =(P_1)/(T_1)* T_2$