Author Question: Consider the data points together with the models in the graph of expansion models. Which model is ... (Read 150 times)

lracut11 · **on:** Jul 27, 2018

Consider the data points together with the models in the graph of expansion models. Which model is most strongly supported by the data?

A) accelerating B) critical C) recollapsing D) coasting

Refer to this scenario for the following questions:

A multi-dimensional being reaches down to Earth and pulls you out of the universe. You are then thrown back into the universe at a place and time of the being's choosing, and you are permitted to leave only after you have identified your surroundings. This process is repeated several times. Through a scientifically unexplainable miracle, you are able to survive in every one of the places that you find yourself. In each scenario below, identify your surroundings (and potentially your cosmic era) from among the choices given.

Question 2

Suppose a white dwarf is gaining mass because of accretion from a binary companion. What happens if its mass reaches the 1.4 solar mass limit?

A) The white dwarf undergoes a collapse and expels the excess mass in a nova eruption.
B) The white dwarf (which is made mostly of carbon) suddenly detonates carbon fusion and this creates a white dwarf supernova explosion.
C) A white dwarf can never gain enough mass to reach the limit because a strong stellar wind prevents the accreting material from reaching it in the first place.
D) The white dwarf immediately collapses into a black hole, disappearing from view.