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4 years ago

Question: Why is DNA useful in tracing evolutionary changes?

Physics

2 answers:

Furkat [3]4 years ago

8 0

C. <span>Certain mutations in DNA happen at a constant rate.

humans and animals evolve to their environments. </span>

ludmilkaskok [199]4 years ago

5 0

The correct answer is option C

DNA is used in tracking the evolutionary changes as certain mutation in DNA happen at constant rate.

DNA is a stable molecule and the mutations that takes place in the DNA occurs at constant rate so it is easy to be studied for the evolutionary traces.

The DNA is used to to study the phylogenetic events that are not documented by the fossils.

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Jason applies a force of 4.00 newtons to a sled at an angle 62.0 degrees from the ground. What is the component of force effecti

Andreas93 [3]

Answer: 1.88 N

Explanation:

Data:

Force = 4.00N
angle = 62°
horizontal force = ?

Solution:

The trigonometric ratio that relates horizontal - leg to hypotenuse is the cosine.

That ratio is:

                        horizontal - leg
cos(angle) = -------------------------
                          hypotenuse

So, applied to the force, that is:

                             horizontal force
cos (angle) = -----------------------------------
                                 total force

So, clearing the horizontal component you get:

horizontal force = force * cos (angle)

Substitute the data given:

horizontal force = 4.00N * cos(62°) = 4.00N * 0.4695 = 1.88 N

Answer: 1.88N

7 0

3 years ago

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In the Bohr model of the hydrogen atom, an electron (massm=9.1×10−31kg) orbits a proton at a distance of 5.3×10−11m. The proton

Marysya12 [62]

Answer:

$\omega = 6.557 \times 10^{16}\ rev/s$

Explanation:

GIVEN,

mass of electron = 9.1 x 10 kg

Radius = 5.3 x 10 m

pulling force = 8.2 x 10 N

Required centripetal for (Fe) for circular motion will be provided with electrical force (F)

$F = m_e\omega^2 r$

$\omega = \sqrt{\dfrac{F}{m_e\ r}}$

$\omega = \sqrt{\dfrac{8.2 \times 10^{-8}}{9.1 \times 10^{-31}\times 5.3 \times 10^{-11}}}$

$\omega = \sqrt{0.17 \times 10^{34}}$

ω = 4.12 x 10¹⁶ rad/s

$\omega = \dfrac{4.12 \times 10^{16}}{2\pi}$

$\omega = 6.557 \times 10^{16}\ rev/s$

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3 years ago

The mass of the jupiter is 19*10^26kg &the mass of the earth is 6*10^24kg.if the distance between the jupiter &earth is

Firlakuza [10]

Answer:
The Gravitational Force between the 2 masses is approximately 1.209ｘ10^32 Newton’s

Explanation:

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3 years ago

HELP ASAP PLEASE - Which best describes how the arrangement of the sun, moon, and the earth affect the range of the tides during

koban [17]

B. When the sun and the moon are aligned, their combined gravitational force attracts the water, causing super high tides on one side of the planet, and super low tides on the opposite side.

3 0

3 years ago

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If one of two interacting charges is doubled, the force between the charges will _____________.

malfutka [58]

If one of two interacting charges is doubled, the force between the charges will double.

Explanation:

The force between two charges is given by Coulomb's law

$F=\frac{k q1 q2}{r^{2}}$