
yr 13 revision - astrophysics

Quiz
•
Physics
•
12th Grade - University
•
Medium
Arunthathi Sankaran
Used 1+ times
FREE Resource
16 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Two stars with the same luminosity might produce different radiation fluxes at Earth. This is primarily due to the stars having different
diameters
distances from the Earth
motions through the Universe
surface temperatures
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
The gravitational field strength at the surface of Mars is one third that at the surface of the Earth. A mass-spring system with a frequency of 3.0 Hz at the surface of the Earth would have a frequency at the surface of Mars of
5.2 Hz
3.0 Hz
1.7 Hz
1.0 Hz
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following statements about the possible fate of the Universe is not correct?
If the Universe is open then it will continue to expand forever.
If the Universe is open then it will eventually reach a maximum size.
If the Universe is closed then it will eventually reach a maximum size.
If the Universe is closed then it will reach a maximum size and then contract.
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A Hertzsprung-Russell diagram is plotted for an old star cluster. Compared with a young cluster containing a similar number of stars there will be fewer
light main sequence stars.
massive main sequence stars
red giant stars.
white dwarf stars.
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
About 25% of the mass of our Universe is thought to consist of dark matter. A key property of dark matter is that it
absorbs all electromagnetic-radiation.
cannot be detected.
emits no detectable electromagnetic-radiation
exerts no gravitational force.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cosmologists describe the universe as being open, closed or flat. A closed universe is one which
has always been the same size.
has a maximum size.
has an uncertain future.
will expand forever.
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In many ways electrical and gravitational forces are similar. One key difference is that only
electrical forces can be attractive and repulsive.
electrical forces have an infinite range.
gravitational forces can be attractive and repulsive.
gravitational forces have an infinite range.
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