Author Question: A typical white dwarf is A) as large in diameter as the Sun but only about as massive as Earth. ... (Read 13 times)

nenivikky · **on:** Jul 27, 2018

A typical white dwarf is

A) as large in diameter as the Sun but only about as massive as Earth.
B) as massive as the Sun but only about as large in size as Earth.
C) about the same size and mass as the Sun but much hotter.
D) as massive as the Sun but only about as large in size as Jupiter.

Question 2

What is the solar neutrino problem?

What will be an ideal response?

ally · **Reply #1 on:** Jul 27, 2018

Answer to Question 1

B

Answer to Question 2

Solar neutrinos coming from the Sun have been detected, but early detectors found them in fewer numbers than predicted by theoretical models. This means either that our models of the Sun were not completely correct or that we didn't understand neutrinos as well as we thought we did. We can measure the luminosity that the Sun is producing and therefore determine how much fusion must be going on in its core. The rate of fusion then determines how many neutrinos should be produced by the Sun, and theories estimate how many of these should be detected here on Earth. It turns out that neutrinos can change type when they interact with matter. Newer detectors can find all three types of neutrinos, and now the total number of neutrinos detected matches predictions.