TRUE OR FALSE: In an unbounded universe, all hydrogen will be used up in about a trillion years
Q: Cite an evidence that we are living in an expanding universe.
A: The universe we are living in is expanding. This is evident from Hubble's observations in 1929. A…
Q: Mass may vary depending on the location in the universe, hence it may be affected by the force of…
A: In this problem, we have to discuss that the given statement is true or false.
Q: Most of the helium of the universe was produced __________ a) In stars b) In quasars c) At the…
A: To find: Most of the helium of the universe was produced
Q: I'm having trouble understanding this. Suppose we have a spaceship about the size of a typical…
A: The mass of the ship is M = 130 million kilograms = 1.3×108 kg The required velocity is 12 % of the…
Q: The figure below is based on an assumed Hubble constant of 70 km/s/Mpc. How would you change the…
A: Given Hubble constant velocity = 70 km/s/Mpc
Q: How can astronomers view events that happened in the universe’s distant past?
A: We all know that time travel is not possible, so an astronomer can't go into the past using a time…
Q: What is dark matter, and what evidence exists for it? What effect does dark energy have on the…
A:
Q: So if our universe is about 15 billion years old. Do we think this because we can't see farther away…
A: We are known the age of universe. We are given that age of universe is about 15 billion years. There…
Q: What has occurred after the Big Bang? Objects in the universe have reached a critical density.…
A: The big bang is how astronomers describe the way the universe started. It is the vision that the…
Q: Calculate the critical density of our universe.
A: Our universe is expanding and critical density is defined as the average density of matter that is…
Q: What is the evidence that the universe was very uniform during its first 400,000 years?
A: The universe was formed from a big explosion called Big Bang. In the beginning, everything was…
Q: The matter density in the Universe today is ?m=2.7×10−27kgm−3. What would be the value of the…
A: Given that the matter density in the Universe today is 2.7×10-27 kg/m3 and the Hubble constant is 38…
Q: Calculate the age of the universe when its temperature was 10¹¹ K.
A: The universe was once part of a singularity of very high density and temperature. All the forces and…
Q: According to the cosmological principle, our place in the universe does not appear to be…
A: According to the cosmological principle, our place in the universe does not appear to be…
Q: how far light would travel in a week on the “cosmic calendar”?
A: To find : How far does the light travel in 1 week of cosmic calender
Q: What do you think of the statement: The universe has no center and no edge (or boundary)?
A: The description of the universe that it has no centre and no edge actually tells a lot about the…
Q: The present number density of electrons in the Universe is the same as that of protons, about 0.2…
A: The present number density of electrons = 0.2m-3. Long before the formation of microwave background,…
Q: The temperature of background radiation left over from the Big Bang during the creation of the…
A:
Q: Considering the reactions in primordial nucleosynthesis only, what would be the impact on the…
A: So the lifetime of neutrons is very crucial in shaping the universe as it is now. Even a slight…
Q: When the universe was approximately one second old its size grew by a factor of 10 to the power of…
A: When the universe was approximately one second old its size grew by a factor of 10 to the power of…
Q: TRUE OR FALSE: Einstein correctly predicted that the universe is both infinite in size and static in…
A: Given: Einstein correctly predicted that the universe is both infinite in size and static in motion.
Q: ne cosmic "dark ages" represent that time in the history of the universe hen:
A: The question can be solved as follows
Q: What is the evidence that the universe was very uniform during its first 400,000 years?
A: The evidence of the uniform nature is explained by particle physics. Before the formation of the…
Q: What was the lowest temperature for photons to be able to produce 0 particles in the early universe?…
A: Given: kT=mc2
Q: Helium is common element in the Universe. True/False
A: Hey, since there are multiple questions posted, we will answer first question. If you want any…
Q: Why can't we see past the cosmological horizon? O The universe extends only to this horizon. O…
A: We can't see past the cosmological horizon because the only things that we saw on the night sky is…
Q: Assume the average density of the universe is 0.1 of the critical density needed for closure. What…
A:
Q: Calculate the age of the universe when the temperature was 10¹ K.
A: The age of the universe when the temperature was 1013 K. Given, TemperatureT=1013 K
Q: The temperature of the universe is 2.76 K. What is the wavelength of the cosmic background…
A:
Q: The presence of dark energy affects to the way the Universe is expanding. Select one: True False
A: Dark energy is a hypothetical form of energy which acts opposite to gravity. It occupies the…
Q: how big is the universe in numbers
A: The universe is made up of all of space, time, and everything that exists within them, including all…
Q: What is spacetime? Explain in most simplest way with illustration. Like using a garter as an example
A:
Q: Explain why the speed of light is the maximum attainable
A: Hi , please find the answer
Q: The law of conservation of energy states that energy can be converted from one form to another but…
A: If energy were not conserved, it would have significant implications for the functioning of the…
Q: Hello from 2042! (A letter from students’ future selves, narrating their lives 20 years after…
A: The letter that you have been asked is written as follows:Dear 2023 Graduates,Greetings from the…
Q: Explain why the universe cannot be older than the Hubble time.
A: Given: To explain universe is not older than the Hubble time as,
Q: What evidence can you cite that the expansion of the universe is accelerating?
A: It is observed that galaxies are moving away from Earth at speeds proportional to their distance.…
Q: Explain how astronomers determined that the universe is expanding.
A: In universe there are millions of stars. These stars are always moving towards Earth or away from…
Q: TRUE OR FALSE: Current mass estimates and deceleration rates tell us that our universe is closed
A: The radiation filled Universe dilutes faster; it's density drops because the volume expands, while…
Q: What is meant by the critical density of the universe? Why is this quantity important to…
A: The critical density is the average density of matter necessary for the Universe's expansion to come…
Q: If the current mass of the universe consists of 75% protons and 25% 4He, what is the current ratio…
A: Given: Universe consists of 75% protons and 25% 4He.
TRUE OR FALSE: In an unbounded universe, all hydrogen will be used up in about a trillion years
Trending now
This is a popular solution!
Step by step
Solved in 2 steps