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2 years ago

Choose the answer that best completes this sentence: The moon may have contributed to the evolution of life from _____.

Physics

1 answer:

Pie2 years ago

7 0

Answer:

Choose the answer that best completes this sentence: The Moon may have contributed to the evolution of life from its gravitational pull.

Explanation:

The gravitational pull between the Earth and the Moon contributed with the evolution of life due to tides.

Remember that tides are formed as a consequence of the differentiation of gravity due to the Moon across to the Earth sphere, that allows the presence of currents in the sea, which avoid the water to stagnate and loss its nutrients for life in it.

However, it is known that life starts in the sea.

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Coming to the bottom of a mountain, a skier moving with speed v collides with a barrier and is brought to a stop in an amount of

IRISSAK [1]

Answer:

Explanation:

Impulse of a force is measured by force x time or F X t

Impulse also equals change in momentum or

F x t = m v₂ - m v₁

The given case is as follows

in the first case

F x t = mv - o = mv

F = mv / t

in the second case

F₁ x 4 t = mv

F₁ = 1/4 x mv /t

F₁ = F / 4

option a) is correct .

iii )

In the last case

F₂ X t = m v/2 -0

F₂ = 1/2 x mv / t

= 1/2 x F

F₂ = F/2

Option e ) is correct.

8 0

3 years ago

If a sound wave is produced with a wavelength of 1.04m what is the waves frequency

dmitriy555 [2]

You should just ask the wave

5 0

3 years ago

You pull a solid nickel ball with a density of 8.91 g/cm3 and a radius of 1.40 cm upward through a fluid at a constant speed of

Sunny_sXe [5.5K]

Answer:

$P = 1.090\,N$

Explanation:

The constant speed means that ball is not experimenting acceleration. This elements is modelled by using the following equation of equilibrium:

$\Sigma F = P - W + F_{D}$

$\Sigma F = P - \rho \cdot V \cdot g + c\cdot v = 0$

Now, the exerted force is:

$P = \rho \cdot V \cdot g - c\cdot v$

The volume of a sphere is:

$V = \frac{4\cdot \pi}{3}\cdot R^{3}$

$V = \frac{4\cdot \pi}{3}\cdot (0.014\,m)^{3}$

$V = 1.149\times 10^{-5}\,m^{3}$

Lastly, the force is calculated:

$P = (8910\,\frac{kg}{m^{3}} )\cdot (1.149\cdot 10^{-5}\,m^{3})\cdot (9.81\,\frac{m}{s^{2}} )+(0.950\,\frac{kg}{s})\cdot (0.09\,\frac{m}{s} )$

$P = 1.090\,N$

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3 years ago

Which device is most likely to operate on alternating current?

aalyn [17]

It is A. a refrigerator cause a alternating current is current that doesn't stop and the refrigerator is plug into the wall.

4 0

3 years ago

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marishachu [46]

Answer:

constant at the speed of light

8 0

3 years ago