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Artyom0805 [142]
3 years ago
3

Which statements explain current theories about dark energy and dark matter? Check all that apply.

Physics
2 answers:
m_a_m_a [10]3 years ago
7 0

Answer:

Space that appears empty actually contains dark energy and dark matter

Dark matter does not emit electromagnetic radiation

Scientists theorize that dark energy is causing the expansion of the universe to accelerate

Explanation:

According to the current theories about dark energy and dark matter, scientists theorize that dark energy is causing the expansion of the universe to accelerate as dark matter does not emit electromagnetic radiation. Moreover, the space that appears empty actually contains dark energy and dark matter.

Lesechka [4]3 years ago
5 0

Answer:

yea the answer are

-Space that appears empty actually contains dark energy and dark matter.

-Dark matter does not emit electromagnetic radiation.

-Scientists theorize that dark energy is causing the expansion of the universe to accelerate.

Explanation:

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Are GMO's Genetically modified organisms in plants?
abruzzese [7]
Yes, a GMO is a genetically modified organisms... however, this typically refers to the plant itself, not an "organism in a plant"
4 0
4 years ago
In Ptolemy's Earth-centered model for the solar system, Venus's phase is never full as viewed from Earth because it always lies
tiny-mole [99]
<h2>Answer: in full phase</h2>

Explanation:

Galileo observed that Venus presented phases (such as those of the moon) together with a variation in size; observations that are only compatible with the fact that <u>Venus rotates around the Sun and not around Earth.  </u>

This is because Venus presented <u>its smaller size when it was in full phase and the largest size when it was in the new one</u>, when it is between the Sun and the Earth.  

In other words: When Venus is in its full phase it is not possible to observe it from the Earth because always in this phase, Venus, the Sun and the Earth are in conjunction (or aligned).  This means <u>the Sun is between Venus and Earth</u>, in the orbit that both planets describe around this star.

Therefore, from the Earth, the Sun covers Venus.

This fact along with other discoveries were presented by Galileo to the Catholic Church (which supported the geocentric theory at that time) as a proof that completely refuted Ptolemy's geocentric system and affirmed Copernicus' heliocentric theory.

7 0
3 years ago
I'm a little bit unsure about this question.
slava [35]

Answer:

Option C. 4 Hz

Explanation:

To know the correct answer to the question given above, it is important we know the definition of frequency.

Frequency can simply be defined as the number of complete oscillations or circles made in one second.

Considering the diagram given above, the wave passes through the medium over a period of one second.

Thus, we can obtain the frequency by simply counting the numbers of complete circles made during the period.

From the diagram given above,

The number of circles = 4

Thus,

The frequency is 4 Hz

8 0
3 years ago
9. Santa brings a special baby a bouncy swing. The child bounces in a harness, with a spring constant k, and is suspended off of
Orlov [11]

Answer:

259.52N

Explanation:

Force initiated on a spring that causes an extension is related by the expression below;

F= K×e

Where F is the Force

K is the spring constant

e is the extension caused by the spring.

By change of subject formula for K;

K = F/e

Now F is the same as weight and is given by mass× acceleration. In this case acceleration is g=9.8m/s2; this is because the child's mass is going to be under the influence of gravity as it swings up the harness}

Hence W =7.15×9.8=70.07N

Hence K = 70.07/0.27 =259.5185N/m

=259.52N/m to 2 decimal place.

4 0
3 years ago
Problem 10: A simple pendulum with mass, m=1 kg and length, L=2.0 m is released by
vova2212 [387]

Answer:

A student is conducting a pendulum experiment. Which of the following pieces of safety equipment would be the most vital to conduct this test?

Explanation:

3 0
3 years ago
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