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lora16 [44]
3 years ago
9

Light rays bend as they pass from air into

Physics
1 answer:
nirvana33 [79]3 years ago
8 0

Answer:

4

Explanation:

Refraction is the bending of light when it moves from one medium to another.

In the situation described:

  • The average speed of light changes when it goes to another medium. The speed of light in water is less than in air.
  • When velocity/speed changes, the index of refraction changes as well. Water's index is greater than in air.
  • Since, speed changes, wavelength changes too.
  • Only the frequency remains the same. The rates of vibration stays the same.

Correct choice is #4.

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Which of the following is a risk associated with taking performance-enchancing drugs.
Damm [24]

Answer:

The correct answer is All of the above.

Explanation:

7 0
3 years ago
A 1000 kg car moving a 10 m/s collides with a stationary 2000 kg truck. The two vehicles interlock as a result of the collision.
IgorLugansk [536]

Answer:

v₃ = 3.33 [m/s]

Explanation:

This problem can be easily solved using the principle of linear momentum conservation. Which tells us that momentum is preserved before and after the collision.

In this way, we can propose the following equation in which everything that happens before the collision will be located to the left of the equal sign and on the right the moment after the collision.

(m_{1}*v_{1})+(m_{2}*v_{2})=(m_{1}+m_{2})*v_{3}

where:

m₁ = mass of the car = 1000 [kg]

v₁ = velocity of the car = 10 [m/s]

m₂ = mass of the truck = 2000 [kg]

v₂ = velocity of the truck = 0 (stationary)

v₃ = velocity of the two vehicles after the collision [m/s].

Now replacing:

(1000*10)+(2000*0)=(1000+2000)*v_{3}\\v_{3}=3.33[m/s]

7 0
3 years ago
2. In the activities below indicate if friction is useful or not useful? Explain your answer. i. Writing yes it is useful becaus
Gemiola [76]

Answer:

Please find the answer in the explanation

Explanation:

Friction is a force that opposes motion. One or two of the advantages of friction are break and ability of an object to walk.

Writing yes it is useful because when your writing because friction helps you see what your writing

ii. Rubbing. Yes, it is useful.

friction make it possible for two object to rub each other

iii. Skiing. No. It is not useful because With presence of friction, skiing will not be possible.

iv. Rotating a wheel No. It is not useful because Friction will oppose the rotation of the wheel.

8 0
3 years ago
What is the average acceleration given by this graph:
Zepler [3.9K]

Answer:

Explanation:

There is no graph.

5 0
3 years ago
Can someone check if what i wrote so far makes sense and if i made a mistake.
Serjik [45]
I don't really know what it's about but everything looks okay to me. There might be some mistakes on the last sentence but i'm not completely sure.
7 0
3 years ago
Read 2 more answers
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