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natta225 [31]
3 years ago
10

Sunspots are cooler than the surrounding solar surface because

Physics
1 answer:
irina1246 [14]3 years ago
6 0

Answer:

Because the convection process stops and hotter plasma doesn't replace the cooler plasma on the surface

Explanation:

Sun spots are the darker and relatively cooler regions on the surface of the Sun (photosphere). Their temperature is around 1000° C lower than the Sun's surface.

Reason: The Sun's surface is granulated because of the convection process happening in the layer just below the photosphere. Because of the convection, hotter plasma comes on the surface, release energy, and then gets replaced by the hotter plasma. Just like tea or water boils. The places where magnetic field line enter into and exit from the surface, this convection process stops. Thus these area starts getting cooler and appear black in color.

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Which has greater value, a newton of gold on earth or a newton of gold on the moon?
jek_recluse [69]
The moon, because the acceleration due to gravity is less.
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Which astronomer spent 20 years plotting the positions of the planets
klio [65]
That was Tycho Brahe, and I thought it was actually more years than that.
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FIRST ANSWER GETS BRAINLIST!!! Which step is part of a scientific investigation?
Luden [163]
Communicating the findings is part of a scientific investigation! The last option
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4 years ago
Two friends, Al and Jo, have a combined mass of 168 kg. At an ice skating rink they stand close together on skates, at rest and
Keith_Richards [23]

Answer: 91.94 kg

Explanation: Supoose Al's mass is m. The combined mass is 168kg, so Jo's mass is 168 - m.

The Law of Conservation of Momentum states that when two objects collide, the total momentum of both objects before the collision is the same as the total momentum of both objects after the collision.

At the beginning, Al and Jo are united without movement, so their initial momentum is zero.

After the release of their hands, Al goes in one direction and Jo moves to the opposite direction. Suppose the direction Al is moving is positive. Conservation of momentum will be

m_{1}v_{1}_{(f)}+m_{2}v_{2}_{(f)}=m_{1}v_{1}_{(i)}+m_{2}v_{2}_{(i)}

where

index i referes to initial momentum

index f to final momentum

index 1 refers to Al

index 2 to Jo

Calculating:

m(0.91)-[(168-m)(1.1)]=0

0.91m+1.1m-184.8=0

2.01m=184.8

m = 91.94

Al has a mass of 91.94 kg.

6 0
3 years ago
What Is meant By MA of a machine is 2?​
stich3 [128]

Answer:

See below ~

Explanation:

The Mechanical Advantage (MA) is defined as the ratio between the force produced by the machine to the force applied to it.

=============================================================

So,

⇒ \frac{F(out)}{F(in)} = 2

⇒ This means that the force produced is twice the applied force

7 0
2 years ago
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