Cesar reads about the big bang theory, which explains that the universe expanded as the result of an explosion. He wants to evaluate whether this theory is a good one. Which statement is a characteristic of a good theory? A. It is the idea of only one scientist. B. It does not change as time passes. C. It is not supported by scientific evidence. D. It changes with new observations made by astronomers.

Q: Gravitational lensing can be used to detect which component of the Universe?   a. Dark Matter.…

A: Answer: (A) Dark Matter

Q: 5. Starting from the Plank distribution, 2he² Ba(A, T) = Derive Wien displacement law by maximizing…

A:

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

A: To determine: The correct option.

Q: Which of the following events in the early universe likely came first?   a. Formation of the…

A: Answer: (b) Big Bang Nucleosynthesis

Q: 16. Classify each statement as an observation, a law, or a theory.(a) The star closest to Earth is…

A: a) This is an observation based on the Doppler effect, the Red shift, and other astronomical…

Q: 6. Two double stars, one having one solar mass and the other three solar masses, rotate about their…

A: Given The mass of stars are M1=MoM2=3Mo Where Mo is the solar mass. Mo=1.989×1030kg the distance…

Q: What was the most startling discovery about the universe that occurred in 1998? O its expansion is…

A:

Q: The first evidence for the dark energy was that: a. the cosmic microwave background spectrum was a…

A: The first evidence for dark energy came in 1998 two teams of astronomers measured light coming from…

Q: 9. I found this meme online. Its goal is to undermine the picture of the Universe proposed by modern…

A: Here are the factors that can affect in this scenario: Earth's Rotation - The Earth rotates around…

Q: We observe an increase in brightness of a star that is 5.81×10¹⁹ m away. How long ago did the actual…

A: Distance of star = 5.81 × 1019 m Speed of light = 3 ×108 m/s

Q: 17) In an accelerating Universe, the scale factor a. grows at an ever-decreasing rate over time. b.…

A: The scaling factor, represented by a(t), tells us to what extent our universe has expanded. Now if…

Q: Gravitational waves travel at the speed of light. Their speed, wavelength, and frequency are related…

A: frequency f=10 Hzspeed of light c=

Q: 3- Compare the size of: observable universe and the earth. Scale down the numbers you found to more…

A: To compare the size of the observable universe and the earth.

Q: 1.  Which of the following theories is probabilistic?   a. Newton's Law of Gravity.   b.…

A: We will answer the question by first looking at the definition of the term 'probabilistic'. The…

Q: Big Bang Theory?

A: the ratio helium to hydrogen observed in universe is not a direct piece of evidence in support of…

Q: 19. An object accelerates 8.2 m/s? when a force of 20.1 newtons is applied to it. What is the mass…

A:

Q: Which of the following represents the notion that our observable Universe may be a part of a much…

A: To find which represent the notion that our observable universe may be part of much larger whole?

Q: 1. Please help me answer A and B. Well explained please. A. Sets out the two postulates of Albert…

A:

Q: What is Hubble’s law?

A: Hubble's law According to Hubble's law the galaxies  are expanding with the rate which is…

Q: 3. Wien Displacement Law. Use both languages: English (50 words max) and Math (a) What does the…

A: (a) wien displacement law is about the displacement of peak of black bodyradiation curve, black body…

Q: 22. Using Newton's Law of Gravitation, what would happen to the magnitude of a force between two…

A: Isaac Newton proposed the Law of Gravitation in his book Principia. According to this law, everybody…

Q: The period during the early Universe in which the first atomic nuclei (not full atoms) formed is…

A: Answer: (d) Big Bang Nucleosynthesis

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.