UNDERSTANDING THE UNIVERSE(LL)-W/CODE
3rd Edition
ISBN: 9780393869903
Author: PALEN
Publisher: NORTON
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Chapter 16.6, Problem 16.6CYU
To determine
The significance of parallel universes.
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Students have asked these similar questions
5
The mass density of our universe is measured to be about 10-29 kg/m3. If an arbitrary point is chosen as the center, how large is the radius of a spherical surface centered at the point so that the mass enclosed in the surface will become a blackhole observed by someone outside the surface?
A. 4.2 trillion light years
B. 420 billion light years
C. 42 billion light years
D. 4.2 billion light years
Is the answer D? Thanks!
In 2030, the Australian Space Agency launches a spaceship to our nearest neighbour Alpha Centauri (4 lightyears away).
How long will the journey take according to a clock on the spaceship if it travels at v=0.999c-299482km/s (where 'c' is the speed
of light equal to 299782km/s).
About 6 years.
Just over 2 months.
About 2 years.
About 4 years.
Chapter 16 Solutions
UNDERSTANDING THE UNIVERSE(LL)-W/CODE
Ch. 16.1 - Prob. 16.1CYUCh. 16.2 - Prob. 16.2CYUCh. 16.3 - Prob. 16.3CYUCh. 16.4 - Prob. 16.4CYUCh. 16.5 - Prob. 16.5CYUCh. 16.6 - Prob. 16.6CYUCh. 16 - Prob. 1QAPCh. 16 - Prob. 2QAPCh. 16 - Prob. 3QAPCh. 16 - Prob. 4QAP
Ch. 16 - Prob. 5QAPCh. 16 - Prob. 6QAPCh. 16 - Prob. 7QAPCh. 16 - Prob. 8QAPCh. 16 - Prob. 9QAPCh. 16 - Prob. 10QAPCh. 16 - Prob. 11QAPCh. 16 - Prob. 12QAPCh. 16 - Prob. 13QAPCh. 16 - Prob. 14QAPCh. 16 - Prob. 15QAPCh. 16 - Prob. 16QAPCh. 16 - Prob. 17QAPCh. 16 - Prob. 18QAPCh. 16 - Prob. 19QAPCh. 16 - Prob. 20QAPCh. 16 - Prob. 21QAPCh. 16 - Prob. 22QAPCh. 16 - Prob. 24QAPCh. 16 - Prob. 25QAPCh. 16 - Prob. 26QAPCh. 16 - Prob. 27QAPCh. 16 - Prob. 28QAPCh. 16 - Prob. 29QAPCh. 16 - Prob. 30QAPCh. 16 - Prob. 31QAPCh. 16 - Prob. 32QAPCh. 16 - Prob. 33QAPCh. 16 - Prob. 34QAPCh. 16 - Prob. 35QAPCh. 16 - Prob. 36QAPCh. 16 - Prob. 37QAPCh. 16 - Prob. 38QAPCh. 16 - Prob. 39QAPCh. 16 - Prob. 40QAPCh. 16 - Prob. 41QAPCh. 16 - Prob. 42QAPCh. 16 - Prob. 43QAPCh. 16 - Prob. 44QAPCh. 16 - Prob. 45QAP
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- Can you travel between parallel universes?arrow_forwardIn 1998, it was announced that the expansion of the universe is accelerating. What does this imply from the perspective of the big bang? a. A force exists that we knew nothing about causes the expansion. b. The universe must be closed. c. The universe is finite. d. The amount of dark matter must be far less than the amount of normal matter. e. The universe must be infinitely old.arrow_forwardWhich particles are not present in the universe at t=300s after the big bang ? select one : a. Electons b. photons c. neutrons d. Positronsarrow_forward
- Describe some possible futures for the universe that scientists have come up with. What property of the universe determines which of these possibilities is the correct one?arrow_forwardObservations of distant galaxies show they appear older than they really are. the size of the visible universe is getting smaller. O galaxies move but they remain at constant distances from one another. O they are moving away from us. O they are all located inside the Milky Way Galaxy.arrow_forwardExplain the term general relativity?arrow_forward
- In a Universe with Ω=1, without the presence of dark energy, the expansion of the Universe would a. remain constant over time b. slow down over time c. reverse and then collapse d. speed up over timearrow_forwardThe cosmic background radiation comes from a time in the evolution of the universe a. when protons and neutrons were first formed. b. when the big bang first began to expand. c. that is known as the inflationary period. d. when gamma rays had enough energy to destroy nuclei. e. when electrons began to recombine with nuclei to form atoms.arrow_forwardTodd and Rod are twin brothers.When they turned 20years old, Rod toured the universe on a high speed spaceship travelling at 2.87x10^8m/s.Todd measured that 10 years passed during his brother’s trip.What age did each brother feel once the brothers were reunited?arrow_forward
- Mass may vary depending on the location in the universe, hence it may be affected by the force of attraction between two huge objects in the universe. true or false subject: dynamics of rigid bodiesarrow_forwardIf the mass density of the universe is above the critical density as it appears to be with the mass detected so far, then the universe is a. flat b. negatively curved C. in steady state d. positively curvedarrow_forwardWhat started the clumping of matter in the early universe that eventually became the seeds of large-scale formation of superclusters of galaxies? a. magnetic and electric field fluctuations b. subatomic quantum fluctuations c. temperature differences d. pressure differences e. none of the abovearrow_forward
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