10 POINTS !!! Why is it risky to build something whose natural frequency can be matched byexternal vibrations?

Answers

Answer 1
Answer:

It is risky to build something whose natural frequency is matched with external vibrations because of  ;  The effect of resonance

When an object constructed has a natural frequency which is equal to the frequency of a nearby external vibration, the amplitude of the vibration of the object will increase due to the resonance effect which occurs because the external frequency matches up with the natural frequency of the constructed object.

The negative effect of resonance is the increase in the amplitude of the vibration of the object which might lead to the partial or complete collapse of the constructed object.

Hence we can conclude that It is risky to build something whose naturalfrequency is matched with external vibrations because of  ;  The effect of resonance

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Answer 2
Answer:

Answer:Most objects have at least one natural frequency of vibration. If a nearby object vibrates at the same frequency, it can cause resonance. Resonance is an increase in amplitude of a vibration that occurs when external vibrations match an object's natural frequency.

Explanation:


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Some organisms have favorable traits that are well-suited to their environments. Organisms with this advantage are more likely to thrive, reproduce, and pass their traits to future generations than organisms without favorable traits. This process is known as

Answers

Answer:

Natural Selection.

Explanation:

I remember this in bio.

Answer:

The Answer is Natural selection

Explanation:

True or false: the resistances measured in this experiment are large. typical values are more than 1000 ω.

Answers

The study of current is called electricity. There are different types of current and these are Alternative current and direct current.

The correct answer is mentioned below.

What is resistance?

  • Resistance is the opposition that a substance offers to the flow of electric current.  It is represented by the uppercase letter R.  
  • The standard unit of resistance is the ohm, sometimes written out as a word, and sometimes symbolized by the uppercase Greek letter omega

According to the question, Since resistance values are typically more than 1000 w so it is true that resistances measured in this experiment are large.

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Answer:

Since resistance values are typically more than 1000 w so it is true than resistances measured in this experiment are large.

What are two main categories of ecosystems

Answers

Answer:

terrestrial or aquatic.

Explanation:

All types of ecosystems fall into one of two categories: terrestrial or aquatic. Terrestrial ecosystems are land-based, while aquatic are water-based. The major types of ecosystems are forests, grasslands, deserts, tundra, freshwater and marine.

Answer:

terrestrial or aquatic.

Explanation:

All types of ecosystems fall into one of two categories: terrestrial or aquatic. Terrestrial ecosystems are land-based, while aquatic are water-based. The major types of ecosystems are forests, grasslands, deserts, tundra, freshwater and marine.anation:

Help please! A bee lands on a flower to collect nectar needed to make food. Pollen from the flower sticks to the bee's body. The bee then flies to another flower to collect more nectar. While there, the pollen from the first flower rubs off, pollinating the plant. This allows the plant to reproduce. Which type of symbiotic relationship does this represent?

Answers

the relationship is MUTUALISM

THE ANSWER IS

mutualism


Which characteristics of DNA polymerase I raised doubts that its in vivo function is the synthesis of DNA leading to complete replication?

Answers

The question is incomplete. The complete question is as follows:

Which characteristics of DNA polymerase I raised doubts that its in vivo function is the synthesis of DNA leading to complete replication?

its composition of a single polypeptide chain.

deficiency of enzyme in some organisms that are still capable of DNA synthesis.

requirement of Mg2+ presence in order for the enzyme to work.

low stability under normal physiological conditions.

Answer:

Deficiency of enzyme in some organisms that are still capable of DNA synthesis

Explanation:

The DNA polymerase I may be defined as the important enzyme that play an important role in the DNA replication of prokaryotes. DNA pol I is the replicating enzyme, DNA repair enzyme and can also acts as the exonuclease.

DNA pol I has been studied invitro and Arthur Korenberg explain the discovery of the DNA pol I. This DNA pol I plays an important role in DNA repair rather than the replication process. This explained invivo by the fact that some in some organisms the deficiency of this enzyme do not halt the process of replication. If the DNA pol I acts as the main replaicating enzyme, the DNA synthesis must be stopped in the organisms that lack DNA synthesis.

Thus, the correct answer is option (2).

ln at least 200 words, proppse a scenario in which a population is evolving. Add the following, Identify the variants within your population, Explain how the variation in your population was generated, Describe your organism, Explain qhy the population is evolving and make a prediction about your population after observing 10 generation of offspring.​

Answers

Answer:

  1. A yellow lizard population living on an island with no predators
  2. A hawk was introduced to the habitat and starts preying on the yellow lizard because it is easier to see from the air
  3. Some of the lizards mutate their color from yellow to greyish brown so they can camouflage
  4. Yellow individuals keep being hunted, while brown individuals get to survive
  5. The following generations of lizards will have a higher proportion of greyish brown individuals and just a few yellow individuals.  
  6. Eventually, almost all of the lizards will be greyish brown individuals.

Explanation:

The scenario is the following.

A population of yellow lizards lives on an island where there is no natural predator. Males of the species use the yellow color to attract females in reproductive seasons. The brighter the males are, the better their genetic quality is. Females are also yellow, but not as bright as males.

A new hawk species was introduced into the island to control some farm pests. But this hawk species prefer to feed on the lizards. The yellow color of these animals contrasts with the dark background and can be easily seen from the air. So the lizard population suffers from significant predation affecting its size sharply.

Some of the lizards then suffer from a mutation and change their color from yellow to greyish brown, which turns to be better to camouflage on the rocks and get to survive. Individuals with greyish brown color get to reproduce at a higher rate than yellow individuals, who keep being hunted by the hawk.

Eventually, after many generations, the yellow individuals decrease to near zero in the population, while greyish brown individuals increase significantly, with males still being brighter than females.

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Natural selection is an evolutive force that can act favoring an allele or against it, according to how it affects the fitness of individuals. Natural selection selects beneficial alleles and increases their frequency in the population.

When many organisms in a population sharing the same trait die, it is because they did not have good fitness, so they were not adapted to the environment and its pressures. The alleles coding for that trait were not good for the fitness of the animals, so they do not get to survive.

These individuals die before reproducing, so they could not transfer their genetic charge to the following generation. Eventually, the alleles coding for the trait will decrease in the population, probably near zero. Natural selection is acting against this phenotype. Other alleles will be beneficiated, and their frequency in the population will increase.

This change in alleles frequency is what we call adaptation.

Natural selection results in adaptation, which means the increase of the aptitude phenotype. Aptitude is the contribution of each genotype to the next generation.

In many cases, adaptations can be correlated to environmental factors or selective pressures applied by other organisms or habitats.

Let us remember that a mutation is a change or alteration in DNI sequences that introduce new variants. Many of these are eliminated, but some of them might succeed and be incorporated into each individual. These mutations are the ones that have been selected by natural selection.  

So, in the exposed example, we are focussing on the lizards population.    

• The selective pressure or modeling environmental factor is predation by the introduced hawk.  

• The lizards´ response to predation is the survival of only those that carry mutations ⇒ greyish brown color  

• Natural selection benefits these mutations.    

• Greyish brown lizards survive and increase their fitness.