How does nuclear fusion within stars provide energy to the Earth?

1 answer:

3 0

The simple answer is that deep inside the core of the Sun, enough protons can collide into each other with enough speed that they stick together to form a helium nucleus and generate a tremendous amount of energy at the same time. This process is called nuclear fusion.

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2 years ago

Which statement accurately describes the relationship between the brain and addiction?

yKpoI14uk [10]

C. A higher amount of addictive chemicals are needed to get the same high when fewer receptors are present...

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2 years ago

Which of the following is the science of naming and classifying living things?

swat32

D. taxonomy
tax = order, classify
nom = name

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3 years ago

Blood type is a genetically determined trait. Two siblings donate blood and find out their blood types. The brother is Type A an

rjkz [21]

Answer:

Explanation:

The brother has different alleles for the blood type gene than his sister does. Blood type is inherited from parents like many other traits that can be displayed on a punnet square. Depending on what the parents blood type alleles were, the brother and sister could have different blood types.

A different number of chromosomes doesn't lead to different blood types, so D is wrong. And A is incorrect because the number genes also does not affect blood type. And I think the blood type genes are on the same chromosome, so B is wrong. C is correct because blood type is inherited by alleles, and different alleles can cause different traits, such as blood types.

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2 years ago

Overall, how has science impacted human health?

mixas84 [53]

Answer:

The correct answer is: <em>C. Increased average lifespan to 78 in the US.</em>

Explanation:

Science has impacted human health by increasing the average lifespan to 78 in the US. Over the last couple of decades, the life expectancy of Americans has increased significantly than what it was 200 years ago. This can be attributed to:

1. Vaccinations- Since the invention of vaccinations, diseases such as tuberculosis, cholera and polio which were major causes of death 200 years ago have virtually been eradicated in the US.

2. Abundant and safer foods available- Commercial and large scale farming has made a wide variety of nutritious foods easier to obtain.

3. Improved sanitation- Safer drinking water, sewage treatment and stricter food inspection has significantly reduced the rate of illnesses due to poor hygiene and sanitation.

In these ways, science has impacted human health by increasing the average lifespan to 78 in the US.

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