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algol [13]
3 years ago
14

Engineers are trying to improve a race car. Their goal is to increase the acceleration of the car using the same engine. Which c

hange shows the best application of Newton’s laws of motion to achieve this goal?
A)increasing the inertia of the car
B)decreasing the reaction force
C)increasing the action force
D)decreasing the mass of the car
Biology
2 answers:
sertanlavr [38]3 years ago
8 0

Answer: The correct answer is D) Decreasing the mass of the car.

Explanation-

According to the Newton's second laws of motion, the force acting on a body is equal to the product of mass of the body and the acceleration.

Mathematically, it is written F = ma

                                          ⇒ a = \frac{F}{m}

As per the question, the engine is same. It means the action force is constant.

In order to increase the acceleration, the mass of the car will be decreased as acceleration inversely proportional to mass for constant force.

Thus, option D) is the right answer.

lesya692 [45]3 years ago
3 0

Engineers are trying to improve a race car. Their goal is to increase the acceleration of the car using the same engine. The change that shows the best application of Newton’s laws of motion to achieve this goal is - option D - decreasing the mass of the car.

When the mass of the car will be less, it will automatically accelerate to higher speed as lighter things move faster than heavier things.

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Answer:

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3 years ago
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Albinism is inherited as autosomal recessive trait. The frequency of the disease in the population equals to 1:20 000. Calculate
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Answer:

0.0139- frequency of heterozygotes in the population

Explanation:

Let q to the power of 2 represents the frequency of the homozygous recessive (aa) = 1/20000 = 0.00005

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During drought years, seeds with thin coats are more likely to desiccate (dry out) and not be able to germinate
Morgarella [4.7K]

Directional selection favors one of the extreme phenotypes. Option B). Fewer plants with thin seed coats will be able to germinate, leading to a higher proportion of plants that produce seeds with thick seed coats.

<h3>What is directional selection?</h3>

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There must be a selective pressure or environmental pressure acting on populations to lead the species to increase the number of individuals expressing that extreme phenotype.

This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.

In the exposed example the environmental pressure is drought during several years.

Drought periods decreases the fitness of plants that produce thin seed coats because they dehydrate before germinating.

Originally the population expressed both types of seeds. But after the drought pressure, only plants that produce seeds with thicker coats got to survive and reproduce.

The correct option is B). Fewer plants with thin seed coats will be able to germinate, leading to a higher proportion of plants that produce seeds with thick seed coats.

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