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2 years ago

Describe an arctic summer

1 answer:

4 0

Summer temperatures in the Arctic remain cool, fluttering around zero in many places, from June through September. In fact, Arctic residents must frequently heat their homes all year long. Neighbourhoods near the sea tend to remain close to 0°C throughout the summer, but inland areas, particularly in the south, regularly reach 7°C–13°C, and hardly as much as 20°C. One reason for the opposition is that the sea ice, which gradually melts, consumes much of the sun's energy, giving little to heat the air over it.

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A scientist crosses a plant with red flowers and a plant

kaheart [24]

Need to know the colors in order to answer this, because the inheritance pattern depends.

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2 years ago

A 6,000 kg train car is moving to the right at 10 m/s and connects to a 4,000-kg train car that wasn't moving. What is the veloc

SIZIF [17.4K]

6 m/s

This type of collision is a Inelastic collision

Explanation:

We begin by finding the momentum of the initial train car;

Remember that momentum is given by the formulae mass (kg) * velocity (m/s)

Therefore;

Momentum = 6000 * 10

= 60,000 kg⋅m/s

The other car has zero momentum because;

4000 * 0

= 0

When the two train cars collide, the total momentum will be;

60,000 + 0 = 60,000

Therefore to find the velocity, well use the same formulae;

p = mv whereby;

p – momentum

m – mass

v – velocity

60,000 = (6000 + 4000) * v

v = 60,000 / 10,000

v = 6

= 6 m/s

This is an elastic collision because we are assuming that no energy is lost in the collision. Most collisions, however, are not elastic but rather inelastic. In inelastic collision some of the kinetic energy is lost to the environment in some other form of energy such as heat energy.

Learn More:

For more on elastic collisions check out;

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2 years ago

How does the digestive system work with the muscular system?

Vadim26 [7]

Receptors in muscles provide the brain with information about body position and movement. The brain controls the contraction of skeletal muscle. The nervoussystem regulates the speed at which food moves through the digestive tract.

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2 years ago

A(n) ____________ is a family-tree like representation of how organisms are related based on ____________ .

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Answer: A PEDIGREE is a family-tree like representation of how organisms are related based on ANCESTRY. It shows genetic relatedness or blood relationship between individuals or organisms.

Explanation: Pedigree can be used to determine

1. Family history or genealogy.

2. Genetic or blood relationship.

3. Coefficient of relationship.

4. Degree of relationship.

5. Proportions of shared genes.

6. Mode of transmission of diseases.

7. Risk evaluation or determination.

Genetic counseling.

8. Linkage analysis.

Pedigree symbols are used in constructing pedigree.

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2 years ago

How can a gene map be used? Why do scientists induce mutations in organisms?

jarptica [38.1K]

Answer:

Genome mapping is used to identify and record the location of genes and the distances between genes on a chromosome. Genome mapping provided a critical starting point for the Human Genome Project. Sequenced DNA fragments can be aligned to the genome map to aid with the assembly of the genome.

By inducing mutations, scientists have been able to increase genetic variation, which breeders depend on to produce crops with desirable traits, such as resistance to diseases and insects. ... Mutations can be induced in a variety of ways, such as by exposure to ultraviolet or ionizing radiation or chemical mutagens.

Explanation:

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2 years ago