PHYSICS HIGH SCHOOL

The big bang produced an imprint of leftover heat called

Answers

Answer 1
Answer:

Answer:

Cosmic Microwave Background

Explanation:

The cosmic background radiation gives us a glimpse into the formative years of our universe. The cosmic background radiation contains radiation from the epoch of recombination of the Big Bang. The radiation is most visible in the microwave region of the electromagnetic spectrum. The radiation poses a strong case that the universe originated from the big bang.
Answer 2
Answer: That's called the "Cosmic Microwave Background".  (CMB)
It was discovered in 1965, and its discoverers were awarded
the Nobel Prize in Physics in 1978.

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An atom of sodium-23 (atomic number = 11) has a positive charge of +1. Given this information, how manyelectrons does it have? How many protons and neutrons does this atom have?

Answers

An atom of sodium-23 (atomic number = 11) with a positive charge of +1  has total number of 10 electron and this atom has 11 protons and 12 neutron.

What is atom?

Protons, neutrons, and electrons make up an atom, with hydrogen being the sole exception since it lacks neutrons.

  • Every atom has a nucleus, which is surrounded by one or more electrons.
  • Protons and neutrons, together known as nucleons, normally make up the same number of the nucleus.
  • Neutrons are neutral, protons are positively charged, and electrons are negatively charged.

Given: An atom of sodium-23 (atomic number = 11) has a positive charge of +1.

So, total number of electrons it have = 11 -1 = 10.

total number of proton it have = 11.

total number of neutron it have = 23 -11 = 12.

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It has a 10 electrons. Since it's atomic number is 11 it must have 11 protons. Also, given that it has a +1 charge, it has one less electron than protons since they have equal but opposite charges. The number of protons is the mass number minus the atomic number = 23-11= 12 neutrons.

Observations show that interstellar clouds can have almost any shape and, if they are rotating at all, their rotation is not perceptible. however, as shown in the video, the nebular theory predicts that a cloud will rotate rapidly once it shrinks to a small size. what physical law explains why a cloud will rotate rapidly as it collapses?

Answers

The law of conservation of angular momentum holds because the cloud is collapsing only due to gravity.Because angular momentum is proportional to velocity times radius, keeping this product constant requires that the velocity of rotation increase when the cloud radius decreases. Hope it helps. 

Sound waves in air are a series ofa. periodic disturbances.
b. periodic condensations and rarefactions.
c. high- and low-pressure regions.
d. all of the above E. none of the above

Answers

Sound waves in air are a series of periodic disturbances, periodic condensations and rarefactions, and high- and low-pressure regions. It is all of the above. The answer is letter D.

Final answer:

Sound waves in air are a series of periodic condensations and rarefactions.

Explanation:

Sound waves in air are a series of periodic condensations and rarefactions. When a sound is produced, it creates compression regions (areas of high pressure) and rarefaction regions (areas of low pressure) that propagate through the air. These alternating regions of high and low pressure create the characteristic waveform of the sound wave.

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the difference between an electric motor and an electric generator is that a motor converts _____ energy into ______ energy, while a generator converts _______ energy into ________ energy

Answers

Answer:electrical,kinetic,kinetic,electrical

Explanation:

Answer:

Electrical, kinetic, kinetic, electrical

Explanation:

Just did it

What is the differences between novae and supernovae?

Answers

Answer:

Explanation:

Nova comes from the Latin which means "new star" and is associated with a sudden brightening of a star and then gradually returns to its original form over a period that may vary from weeks to years.

While Supernova is infrequent celestial phenomena associated with the explosion of the material of star which results in a bright short-lived entity that emits a large amount of energy.

Supernova destroys its host star while nova does not destroy its host star and results in only a small amount of mass destruction.                

gabo’s constructed head no. 2 investigates the sense of ______ and form implied by flat planes, in contrast to the solid mass of conventional sculpture.

Answers

The correct answer for the question that is being presented above is this one: "Space." Gabo’s constructed head no. 2 investigates the sense of space and form implied by flat planes, in contrast to the solid mass of conventional sculpture.
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