Cosmic inflation refers to ____(A) the current period of cosmic acceleration.(B) stellar winds creating bubbles of gas.(C) the Universe filling up with hydrogen gas.(D) a brief early period of hyperrapid expansion of space-time. (E) the ongoing expansion of the Universe.

Answers

Answer 1

Answer:

Answer:

(D) a brief early period of hyper rapid expansion of space-time.

Explanation:

Cosmic inflation is a theory which states that in an interval of 10⁻³⁶ seconds to around 10⁻³³ seconds after the big bang there was a massive expansion.

According to the big bang theory the universe came to be from a singularity i.e., a point of infinite gravitational field. The universe is expanding this means that according to the conservation of energy the universe was expanding from the beginning.

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A(n) is a material that causes a wave to bounce off of it

Answers

Answer;

A barrier, a surface or a boundary

Explanation;

Reflection is the property waves that occurs due to the bouncing back of a wave after it strikes a barrier.

Reflection involves change in direction of a wavefront at an interface between two different media such that the wavefront returns into the medium from which it originated. In other words, the direction of the wave changes when they bounce of a barrier or a surface.

Its a Reflector

Reflector is some sort of material that is used to collect or bounce off energy such as sound, light, or radio wave

Usually it took form in some sort of parabolic that revolve around an axis

How do similar (S-S or N-N) magnetic poles interact?

Answers

Magnets with the same polarity (N-N or S-S) repel one another along the same direction. This agrees to the common rule that like poles repel and unlike poles attract. Hope this answers the question. Have a nice day. Feel free to ask more questions.

Explanation:

Magnet has two poles: (1) North pole and (2) South pole.

Like poles repel each other. If the like poles are interacting each other then there will be force of repulsion in between these poles.

Unlike poles attract each other. If the unlike poles are interacting each other then there will be force of attraction in between these poles.

S-S and N-N magnetic poles repel each other.

How does a supernova occur?

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Supernova occurswhen black holes stretch so much running out of nuclear fuel. When a starcollapses to form a black hole, its mass increases. Supernovas have greatermasses than black holes. One example application of this is the theory of BigBang. Fromtheories such as Ekpyrotic theory, White Holes, Matrix theory, and Quantumtheory, the Big Bang theory is the theory mostly accepted by scientists.According to the theory, the universe started as a singularity, that is, from ablack hole under extreme gravitational pressure and expanded (instead ofexploded) and cooled. Its cooling, according to the theory, is still happeningnow as of the moment.

For an isothermal process, the work done by or on a system of ideal gas is equal to the change in what? A. The work done is equal to the change in internal energy.
B.The work done is equal to the change in heat energy.
C.The work done is equal to change in entropy.
D.The work done is equal to the change in pressure.

Answers

For an isothermal process, the work done by or on a system of ideal gas is equal to the change in heat energy. The correct option is B.

What is isothermal process?

The process in which the temperature remains constant and other physical quantities are variable, is called the isothermal process.

From the first law of thermodynamics, the work done is the difference between heat supplied and change in internal energy of the system.

W = ΔQ - ΔU

For isothermal process, change in internal energy will be zero.

So, work done is equal to the change in heat energy.

Thus, the correct option is B.

Learn more about isothermal process.

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the work done is equal to the change in heat energy

Athen transparent sheet is placed in front of one of slits in ydse experiments the fringe width will

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Answer:

when a thin transport sheet is placed in front of the double

slit no physical quantities affecting the fringe withers changed therefore the fringe width remains the same

A shorter electromagnetic wave is _____. more powerful less powerful hotter colder

Answers

Answer

more powerful

Explanation
Electromagnetic waves are waves that do not require material medium for propagation. For example x-rays, UV and gamma rays.

From the wave equation, V= λf, when the wavelength is short the frequency is high.
Frequency determines the intensity of the wave. When high the frequencies are high the waves has more penetrating power, hence more powerful.

Answer:

More powerful

Explanation:

I answered it and got it right.

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