_______ is the hypothetical form of energy that produces a force that opposes gravity and is thought to be responsible for the accelerating expansion of the universe.     Degenerate matter     Pulsar     White energy     Dark energy

Q: Place the large black ball (black hole) in the center of the sheet. Experiment with different sized…

A:

Q: Contra Parmenides and a previously universally accepted idea, at the end of his life, Stephen…

A: In this question we have to select the argument made by Stephen Hawking.

Q: Current evidence suggests that the universe is   a. flat, infinite, and neither expanding nor…

A: To determine: The correct option.

Q: The objects that are detected at the points where the gas of a radio jet hits the extragalactic…

A: The quasar are small and the powerful source if energy that is active core of very distant galaxies.

Q: All of the matter that we know (dark matter excluded) is made out of quarks and leptons. HINT: The…

A: Quark is the elementary particle that consists of fractional electronic charges. It is a fundamental…

Q: It is believed that there is a black hole with a mass of approximately four million times the mass…

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Q: . What is formed when there is a fusion of two deuterium nuclei in big bang nucleosynthesis? a.…

A: Given : 6.fusion of two deuterium nuclei in big bang Nucleosynthesis.

Q: Heavier elements like carbon, nitrogen and iron are spread out into space mainly through a.…

A: Some 14 billion years ago, a massive explosion occurred which is called the big bang. It created the…

Q: Part 1. Stellar Mass Black Holes These are the collapsed cores of massive stars which end their life…

A:

Q: A sphere of matter and a sphere of antimatter (both at rest) can annihilate releasing 0.6· 1030 MeV…

A: Let mass of each sphere be m the total energy  released when annihilated, E=0.6 x 1030 MeV = 0.6 x…

Q: A light year is the distance traveled by light in one year. Identify the distance to a nearby galaxy…

A: Given data:  Distance of galaxy = 2×106 light years Speed of light (c) = 3×108 m/s Required:…

Q: Massive stars ending their lives in supernova explosions produce the nuclei of all the atoms in the…

A: The formula for the relativistic momentum of a particle is:

Q: A crew on a spacecraft watches a movie that is two hours long.the spacecraft is moving at high speed…

A: Given data: The time period of the movie is 2 hrs.

Q: Hannah takes an exotic cruise on a spaceship that travels at 92% of the speed of light. As measured…

A: In the special theory of relativity, time dilation is the difference in elapsed time for an event…

Q: What possible evidence do we have for the existence of "dark energy"? a. It blocks our view of…

A: In this question we have to answer what possible evidence do we have for the existence of "Dark…

Q: a.) Galaxy B moves away from galaxy A at 0.521 times the speed of light. Galaxy C moves away from…

A: Given ( a )Galaxy B moves away from galaxy A at 0.521 times the speed of light Galaxy C moves away…

Q: 23. General relativity * is a theory of gravity which is equivalent to Newton's gravitational model,…

A: the correct option is (c) : is a theory of gravity which states that gravity is not a force.

Q: Dark matter experiments are built underground to avoid detecting which type of particle? Group of…

A: In order to reduce the noise level signals caused by Cosmic Rays at Earth's surface, dark matter…

Q: Which of these forces is NOT unified with the others in a Grand Unified Theory?   a. gravitational…

A: Grand unified theory of Forces includes three of four fundamental Forces, which are: Strong Force…

Q: About what percentage of the universe is believed to be composed of normal matter? O 5% O > 22% O…

A: 68% of the matter is dark energy. 27% of the matter is dark matter. Rest less or equal to 5% is…

Q: About: Lorentz Law Required: • history of person who discovered it • definition and uses •…

A: History of person who discovered it: We know that every charge experiences force when it is under…

Q: CERN can accelerate protons up to 99.9999991% of the speed of light. What is the γ factor for these…

A: Given that                   The speed of the protons is (v) = 99.9999991% of the velocity of the…

Q: In the movie Interstellar, the main characters are on a planet where 1 hour = 7 years on Earth. If…

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Q: Which statement below does not fit the model of the big bang and the subsequent changes in the…

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Q: When observed from Earth, the wavelengths of light emitted by a star are shifted toward the red end…

A: Introduction :- Here it is given that a star is emitting light and this light is being received by…

Q: Explain the expected fate of the universe in entropic terms.

A: The expected fate of universe will be thermodynamic equilibrium.

Q: Einstein said that gravity exists because: *   A. massive objects warp space. B. of the existence of…

A: Einstein said gravity exist because Let's check each option one by one. A. Massive object warp space…

Q: Quasars are among the most distant objects in the universe and are moving away from us at very high…

A: Doppler Effect refers to the change in wave frequency during the relative motion between a wave…

Q: Part 1: Concept notes ( i need 10 terms ) Terms/Concepts How do I understand it…

A: Speed of the spaceship v=70c/100=0.7c, distance travelled to the other planet d=5 light years, time…

Q: Event Horizon is a region around a black hole where: group of answer choices: even light cannot…

A: Event horizon is the boundary marking the limit of a black hole. Add event horizon the velocity of…

Q: Two identical clocks are made. One is placed on the surface of a massive planet, and the other is…

A: According to gravitational time dilation, gravity is proportional to time. Hence, the closer the…

Q: The redshift due to the Doppler effect is caused by sources of light obscured by interstellar dust.…

A: Doppler effect : The Doppler effect is observed whenever the source of wave is moving with respect…

Q: ____ occurs when light travels out of a gravitational field, loses energy, and its wavelength grows…

A: A gravitational redshift occurs when light travels out of a gravitational field, loses energy, and…

Q: The special theory of relativity is based on two principles: the relativity principle, which states…

A:

Q: Doppler redshift in light from a star indicates that the star is_____.

A: When there is relative motion between observer and source then there is change in frequency ( or…

Q: Hannah takes an exotic cruise on a spaceship that travels at 95% of the speed of light. As measured…

A: Speed of cruise= 0.95c c= speed of light Time noted by Hannah, ∆T= 7 Days

Q: The Big Bang Theory is not about the bang itself but about what happened afterwards.  Most of what…

A: Required :  True or False

Q: If the Sun was shrunk to fit the same mass into a smaller volume what would happen to the curvature…

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Q: Would would happen to Spacetime at the surface of the Sun if you kept the volume the same but…

A: Answer:- The spacetime curvature would increase with increasing density.

Q: Choose the BEST answer to the following: According to general relativity, (a) mass distorts…

A: The general theory of relativity states that gravity is a wrapping of space-time. It means the mass…

Q: A particle maintains a circular orbit around a black hole of mass 10 Solar masses at a distance…

A: Mass of black hole (M) = 10×2×1030 kg = 2×1031 kg distance (R) = 2×Schwarzchild radii = 2×G×Mc2=…

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.