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3 years ago

The presence of which phenomenon proved the predictability of the big bang theory?

Physics

2 answers:

Law Incorporation [45]3 years ago

7 0

The measurement of the expansion of the universe was what gave rise to the big bang theory and it's predictions.

sergejj [24]3 years ago

4 0

Cosmic Microwave Background is the answer.

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How long should you hold a stretch? 10-30 seconds 90 seconds 5 minutes

galina1969 [7]

I think you should hold a stretch for 10-30 seconds

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3 years ago

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The diagram shows waves of sound travelling through the air. By which factor is the sound intensity decreased at 3 meters?

SIZIF [17.4K]

The diagram is missing; however, we know that the intensity of a sound wave is inversely proportional to the square of the distance from the source:
$I(r)= \frac{1}{r^2}$
where I is the intensity and r is the distance from the source.

We can assume for instance that the initial distance from the source is r=1 m, so that we put
$I= \frac{1}{r^2}= \frac{1}{(1)^2}=1$
The intensity at r=3 m will be
$I= \frac{1}{r^2}= \frac{1}{(3)^2}= \frac{1}{9}$
Therefore, the sound intensity has decreased by a factor $1/9$ .

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explain how a mutation in an individual's DNA occurs, and describe the effect it may have on the individual's traits.

zysi [14]

A mutation in the DNA ca happen during growth, when the DNA splits and becomes RNA. Mutations can also occur from other invasive cells, such as bacteria or viruses. A mutation in your DNA can also be there from when you were born. These mutations can cause variations in your appearance, such as eye color, ability to see, taste, smell and the complexion of your face. The mutations can also result in variations in your growth, causing immature or late growth. These mutations are dangerous, and can result in failure of the organisms cells , to complete and utter death of an organism.

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The question states: two large, parallel conducting plates are 12cm

AnnZ [28]

Answer:

1. 24375 N/C

2. 2925 V

Explanation:

d = 12 cm = 0.12 m

F = 3.9 x 10^-15 N

q = 1.6 x 10^-19 C

1. The relation between the electric field and the charge is given by

F = q E

So, $E=\frac{F}{q}$

$E=\frac{3.9 \times 10^{-15}}{1.6 \times 10^{-19}}$

E = 24375 N/C

2. The potential difference and the electric field is related by the given relation.

V = E x d

where, V be the potential difference, E be the electric field strength and d be the distance between the electrodes.

By substituting the values, we get

V = 24375 x 0.12 = 2925 Volt

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3 years ago

What are the main ideas of physical science

Mademuasel [1]

Hysical science is defined as the study of observable phenomena in the universe.

the main idea of physical science is known as the "scientific method". 

this method states: 

observe a "real" ( not imaginary ) phenomena. 

make a hypothesis ( or theory / idea ) that EXPLAINS this phenomena. 

conduct a real experiment to test this hyothesis. 

confirm that the experiment validates the original hypothesis and if necessary amend the theory. 

it has worked so well that the very communication you are having with me is a result of the wonders of physical science.

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3 years ago