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3 years ago

14

What occurs when light bends while passing from one medium to another?

1 answer:

Levart [38]3 years ago

7 0

Answer:So the answer is B

Explanation: When the light rays either bend or change their direction while passing from one medium to another it is called refraction of light. The refraction of light takes place when light travels from air into glass, from glass into air, from air into water or from water into air.

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Alvin paddled for 44 hours with a 33-km/h current to reach a campsite. The return trip against the same current took 77 hours.

sveta [45]

Answer:

121km/h

Explanation:

Let speed of boat=xkm/h

Speed of water flow=33 km/h

Speed upstream=(x-33)km/h

Speed downstream=(x+33)km/h

Time=44 hrs

Time =77 hrs

We have to find the speed of boat.

$Distance=Speed\times time$

Using the formula

Upstream distance=Downstream distance

$(x-33)\times 77=(x+33)\times 44$

$77x-2541=44x+1452$

$77x-44x=1452+2541$

$33x=3993$

$x=\frac{3993}{33}=121$

Hence, the speed of boat=121km/h

8 0

4 years ago

Which part of the electromagnetic spectrum is typically used to make images based on the temperatures of objects

lesya692 [45]

That would be Infared

6 0

4 years ago

Read 2 more answers

Electromagnetic radiation that has a short wavelength will have a ________ frequency.

ArbitrLikvidat [17]

High frequency , it is because wavelength is inversely proportional to frequency

8 0

3 years ago

the passengers in a roller coaster feel 50 heavier than their true weight as the car goes through a dip with a 30m radius of cur

NeTakaya

Answer:

v = 12.12 m/s

Explanation:

Given that,

Radius of the curvature, r = 30 m

To find,

The car's speed at the bottom of the dip.

Solution,

Let mg is the true weight of the passenger. When it is moving in the circular path, the centripetal force act on it. It is given by :

$F=\dfrac{mv^2}{r}$

The normal reaction of the passenger is given by :

$N=mg-50\%mg$

N = 1.5 mg

Let v is the car's speed at the bottom of the dip. It can be calculated as:

$1.5\ mg-mg=\dfrac{mv^2}{r}$

$v=\sqrt{0.5gr}$

$v=\sqrt{0.5\times 9.8\times 30}$

v = 12.12 m/s

So, the speed of the car at the bottom of the dip is 12.12 m/s. Hence, this is the required solution.

7 0

3 years ago

The fundamental frequency of a musical note is 330Hz. Which harmonic is this?

allsm [11]

Answer:

it is a type of even harmonic

6 0

3 years ago