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LuckyWell [14K]
3 years ago
12

Gravitational force between two objects increases as mass increases and distance

Physics
1 answer:
Tems11 [23]3 years ago
6 0
Distance decreases.
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The critical angle between a medium and air is 430. What is the speed of light in that medium?
vagabundo [1.1K]

Answer:

The speed of light is that medium is 281907786.2 m/s.

Explanation:

since the critical angle is Фc = 430, we know that the refractive index is given by:

n = 1/sin(Фc)

  = 1/sin(430)

  = 1.06

then if n is the refractive index of the medium and c is the speed of light, then the speed of light in the medium is given by:

v = c/n

  = (3×10^8)/(1.06)

  = 281907786.2 m/s

Therefore, the speed of light is that medium is 281907786.2 m/s.

8 0
3 years ago
Which contains the particles that are vibrating fastest?
Phantasy [73]

Answer:

Boiling water

Explanation:

3 0
2 years ago
PLEASE HELP<br><br> TOPIC - CONVECTION
Alex777 [14]

Answer:

  1. Dry air burns out and gets warm
  2. It's smoke and smoke always rises
  3. Not ours
  4. It makes sure no air is inside bc air gets cold an freezes
6 0
3 years ago
A train moves at a constant velocity of 90 km/h. How far will it move in 0.25h?<br>​
Serjik [45]
In 0.25h it will move in 22.5 kilometers.
8 0
3 years ago
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Sometimes a person cannot clearly see objects close up or far away. To correct this type of vision, bifocals are often used. The
Alexxx [7]

Answer:

The power of top half of the lens is 0.55 Diopters.

Explanation:

Since, the person can see an object at a distance between 34 cm and 180 cm away from his eyes. Therefore, 180 cm must be the focal length of the upper part of lens, as the top half of the lens is used to see the distant objects.

The general formula for power of a lens is:

Power = 1/Focal Length in meters

Therefore, for the top half of the lens:

Power = 1/1.8 m

<u>Power = 0.55 Diopters</u>

3 0
3 years ago
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