The striking gap between Saturn's A and B rings is called the ________
Fill in the blank(s) with correct word
Cassini Division
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Briefly discuss dark matter
What will be an ideal response?
What do we mean by the singularity of a black hole?
A) There are no binary black holes—each one is isolated. B) An object can become a black hole only once, and a black hole cannot evolve into anything else. C) It is the center of the black hole, a place of infinite density where the known laws of physics cannot describe the conditions. D) It is the edge of the black hole, where one could leave the observable universe. E) It is the "point of no return" of the black hole; anything closer than this point will not be able to escape the gravitational force of the black hole.
The Planck era is another name for the present period of time in the universe
Indicate whether the statement is true or false
A container with a one-liter capacity at 27°C is filled with helium to a pressure of 2.0 atm. (1 atm = 1.0 × 10^5 N/m2.) How many moles of helium does it hold?
a. 0.041 b. 0.081 c. 0.45 d. 0.90 e. 1.0