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alukav5142 [94]
3 years ago
11

Why do sun spots appear darker than their surroundings

Biology
2 answers:
Aleks04 [339]3 years ago
3 0

Answer:

they are comer than their surroundings.

Sunspots are cooler because their magnetic fields inhibit the replenishing of heat from convective flows (due to the interaction between plasma and magnetic fields). This allows them to cool radiatively. The rest of the solar surface is constantly being replenished by convective cells that reheat it.

stiks02 [169]3 years ago
3 0

Answer:

because they are significantly cooler than the rest of the Sun's surface Despite their gloomy appearance, they are nonetheless extremely hot. A sunspot would shine brightly if it were alone in space.

OAmalOHopeO

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777dan777 [17]

Answer:

D. Water from rivers, lakes, and streams seeps into the ground and saturates it to reach the water table.

Explanation:

No time, the first three do not make sense or are wrong

8 0
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Epigenetics refers to a special kind of hereditary mechanism. Epigenetic changes do not change the DNA nucleotide sequence, yet
OlgaM077 [116]

Answer:

Histone acetylation or DNA methylation.

Explanation:

The epigenetics may be defined as the genetic phenomena that might cause mutation in the organism's genome. The DNA sequence of the organisms do not get changed in epigenetics.

This phenomena is limited whether the gene is herited from the mother ot the father. The phenomena like acetylation of histones increase the gene expression. The DNA methylation and histone deacetylation at specific residues reduces the gene expression.

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5 0
3 years ago
Given a force of 56 n and an acceleration of 7 m\s2, what is the mass
nirvana33 [79]
<span>56 n/ 7 m/s^2 = 8kg

Example:
To solve this given word problem we can first identify the given and the apt formula to use in this phenomenon: Given: Force = 4, 500 N = 4, 500 kg-m/s^2 Acceleration = 5 m/s^2   </span>
<span>Formula: f=ma </span>
<span>Derivation: m = f/a </span>
<span>Solution: </span><span><span>
1.    </span>M = f/a</span> <span><span>
2.    </span>M = 4,500 kg-m/s^2 / 5 m/s^2</span> <span><span>
3.    </span>M = 900 kg  </span> 

<span>Hence, the object’s mass is </span>900 kg.<span>
</span>

3 0
3 years ago
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ELEN [110]

Answer:

the answer B

Explanation:

3 0
2 years ago
Kidneys are often compared to filters because they cleanse unwanted waste from both frogs and humans true or false ?
PtichkaEL [24]

"Kidneys are often compared to filters because they cleanse unwanted waste from both frogs and humans" is TRUE.

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Frogs also have the excretory system with two kidneys and similar to mammals. Its function is to eliminate the nitrogen product from the blood. Frogs make large volumes of dilute urine to wipe out harmful products from the tubules of the kidneys.

Tadpoles and aquatic frogs excrete the nitrogen as ammonia, but most terrestrial adults excrete it mostly as urea which is less threatening substance. A few tree frog species with little water access excrete the still less harmful uric acid.

5 0
3 years ago
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