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3 years ago

Define Refraction and give some knowlegde about it

1 answer:

7 0

Refraction is the change in direction of a wave, caused by the change in the wave's speed. Examples of waves include sound waves and light waves. Refraction is seen most often when a wave passes from one transparent medium to another transparent medium. Different types of medium include air and water. When a wave passes from one transparent medium to another transparent medium, the wave will change its speed and its direction. For example, when a light wave travels through air and then passes into water, the wave will slow and change direction.

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It is 4.0 km from your home to the physics lab. As part of your physical fitness program, you could run that distance at 10 km/h

Musya8 [376]

Answer:

Explanation:

To solve this problem we have to take into account that the energy consumed per second is the power. Hence, by multipling the power and the time spent to arrive to the lab we obtain the total energy consumed.

But first we have to calculate the time

$t_{1}=\frac{x}{v_{1}}=\frac{4km}{10\frac{km}{h}}=0.4h=0.4(3600s)=1440s\\t_{2}=\frac{x}{v_{2}}=\frac{4km}{3\frac{km}{h}}=1.3h=1.3(3600s)=4800s\\$

Now we use E=W*t for both times

$E_{1}=t_{1}W_{1}=(1440s)(700W)=1008000J\\E_{2}=t_{2}W_{2}=(4800s)(290W)=1392000J\\$

A. Hence, by running the energy consumed is lower.

E1=1008000J

E2=1392000J

C. Because the more intense exercise is made in a lower time in comparison with the less intense exercise, and higher the time, more energy is consumed.

5 0

3 years ago

Hello please help i’ll give brainliest

Maslowich

Answer:

Large mountains ranges will form

Explanation:

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3 years ago

Garen is climbing stairs to the castle. He travels a distance of 350 stairs in 5 minutes of time.

KATRIN_1 [288]

The Answer Is 70:1
Hope This Helps You.

6 0

3 years ago

Read 2 more answers

What is 10^2 in scientific notation?

Eduardwww [97]

Answer:

1×10^2

Explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

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3 years ago

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What is an example of a force? Pressure Power Energy Weight

Kryger [21]

Answer:

weight

Explanation:

weight is the pull of gravity so its a force !!

5 0

3 years ago