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ser-zykov [4K]
3 years ago
12

Which force requires contact?

Physics
2 answers:
Minchanka [31]3 years ago
8 0

Answer:

A

Explanation: A is a example of Air resistance force, which is a contact force.

rosijanka [135]3 years ago
6 0
Answer is A. The force exerted by air as an object moves through it.
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Which force is responsible for the formation of waves? A. gravity B. wind C. friction D. centripetal
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Gravity is the cause of formation waves.
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Scientists think that convection currents flow in earth’s
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Answer: convection currents does flow because God created the earth and God it makes life flow

Explanation:

God

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laser light hits two very narrow slits that are separated by 0.1mm adn is viewwed on a screen 2m downstream. Sketch on the axis
Irina-Kira [14]

Answer:

 d y / x = m λ

Explanation:

When the laser beam, which is a coherent light, hits the slits, part of each beam passes through each slit.

When this is observed on a screen that is quite far from the slits, a series of intense linear separated by dark areas. The explanation for this distribution of the light pattern is that when adding the rays that come out of the slits they travel different distances, which introduces a difference in optical path and if this difference is an integer multiple of the wavelength, a bright line

                d sin θ = m λ

Where d is the distance between the slits (0.1 mm)

Also, since the angle of the measurements is small, we can approximate the tangent

          tan θ = y / x = sin θ /sin θ

          sint θ = y / x

Substituting into the equation

          d y / x = m λ

This expression gives the location of the bright lines on the screen

5 0
3 years ago
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If the star Alpha Centauri were moved to a distance 10 times farther than it is now, its parallax angle would
7nadin3 [17]

Answer:

decrease by a factor 10

Explanation:

The parallax angle of a close star is given by

p=\frac{1}{d}

where

p is the parallax angle

d is the distance of the star from Earth, in parsecs

From the formula we see that the parallax angle is inversely proportional to the distance.

In this problem, the distance of the star is increased by a factor 10:

d' = 10 d

so the new parallax angle would be

p'=\frac{1}{10 d}=\frac{1}{10}\frac{1}{d}=\frac{p}{10}

So, the parallax angle would decrease by a factor 10.

4 0
3 years ago
the diagram below shows a segment of DNA before and after erplication, which of the following could have occured as a result of
Lorico [155]

The change or mutation in a segment of DNA after replication may lead to changes in the genotype, the traits of the organism and the proteins (option i, ii and iii).

<h3>What is a genetic mutation?</h3>

A genetic mutation is any change in the nucleotide bases of the genome of an organism that may be associated with modifications in the phenotypic traits or features of the organism if this change alters the expression of a given gene that produces a particular protein.

Mutations may be neutral when they don't show an apparent effect on the phenotype of an organism such as occur in mutations located in intergenic regions.

Therefore, with this data, we can see that a genetic mutation may alter the proteins produced by an organism which has a direct effect on the phenotype by altering the structures that it is able to synthesize.

Learn more about genetic mutations here:

brainly.com/question/29000870

#SPJ1

8 0
2 years ago
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