Presently, what is happening to the helium in the Sun's core?
What will be an ideal response?
It builds up there, for now the core is not hot enough to fuse it further.
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Which of the following statements is true of white dwarfs?
A) Some of them are among the hottest stars known. B) Few of them are positioned in the upper-right corner of the Hertzsprung-Russell (H-R) diagram. C) They have high luminosities. D) They have a very big surface area from which they radiate energy.
One mole of an ideal gas is held at a constant volume of 1 liter. Find the change in pressure if the temperature increases by 50°C
a. 3 atm b. 4 atm c. 2 atm d. 1 atm e. 5 atm
When gravitational, magnetic and any forces other than static electric forces are not present, electric field lines in the space surrounding a charge distribution show
a. the directions of the forces that exist in space at all times. b. only the directions in which static charges would accelerate when at points on those lines c. only the directions in which moving charges would accelerate when at points on those lines. d. tangents to the directions in which either static or moving charges would accelerate when passing through points on those lines. e. the paths static or moving charges would take.
If the electron is a lepton, then the antilepton is a(n) __________
Fill in the blank(s) with correct word