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Lunna [17]
3 years ago
12

100 POINTS AND BRAINLIEST! What were the Magdeburg Hemispheres?

Physics
2 answers:
amm18123 years ago
8 0

The Magdeburg hemispheres are a pair of large copper hemispheres, with mating rims. They were used to demonstrate the power of atmospheric pressure. When the rims were sealed with grease and the air was pumped out, the sphere contained a vacuum and could not be pulled apart by teams of horses.

pogonyaev3 years ago
7 0

Answer:

Magdeburg hemispheres are two half-spheres of equal size. Placing them together traps air between them. This air is merely trapped, and not compressed, so the pressure inside is the same as the pressure of the atmosphere outside the spheres. The spheres thus pull apart with nearly no resistance.

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Parallel light waves hit the surface of a still lake and reflect in the same direction. Which interaction of light and matter do
vampirchik [111]

Answer:

Regular reflection

Explanation:

- Reflection is the phenomenon that occurs when a light wave hits the interface between two different mediums and it bounces off back into the same medium. The angle of reflection (measured between the reflected ray and the perpendicular to the interface) is equal to the angle of incidence (measured between the incident ray and the perpendicular to the interface).

There are two different types of reflection:

- Regular reflection: this occurs when the interface between the two mediums is smooth (such as in the case of the still lake), so all the parallel light waves (which have same angle of incidence) are reflected exactly with the same angle of reflection (so, they come out all with same direction)

- Diffuse reflection: this occurs when the interface between the two mediums is not smooth, so each light ray is reflected with a different angle because it hits the interface with a different angle of incidence.

Therefore, in the case of the still lake, the correct answer is regular reflection.

6 0
3 years ago
How would the seasons change if the earth were tilted at 90 degrees instead of 23.5?
PIT_PIT [208]
<span>The 23.5 degree tilt is responsible for the seasons. If the earth had no tilt there would not be seasons. If the earth was tilted by 90 degrees the seasonal changes would be at the most extreme. The Earth's pole would point directly at the sun at a point on the track around the sun. As the Earth revolves around the Sun the pole would alternate twice each year between pointing directly at the sun and being perpendicular to the sun. 

I hope this helps you! 
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6 0
3 years ago
Exerts a force on anything that has an electric charge
djyliett [7]

Answer:

Electric Field

Explanation:

7 0
3 years ago
How much work is done when a 5 N force moves a block 4 m
defon
20N•m or 20J. Work is equal to force•distance, and 5N•4m is 20N•m, or J
4 0
3 years ago
I am the energy of moving electrons and magnetic interactions. What type of energy am I?|<br> am the
Law Incorporation [45]

Answer:

Electrical energy

Explanation:

Electrical energy deals with magnetism and moving electrons

8 0
3 years ago
Read 2 more answers
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