I present this to give you an idea of what to expect.
DO ALL 14 PROBLEMS. MARK YOUR ANSWERS ON THIS SHEET AND TURN IT IN.
SHOW WORK ON THE LAST 4 PROBLEMS.
Multiple Choice are worth 4 points each.
1pc=3x1016m 1AU=1.5x1011m M¤ =2x1030kg R¤ =7x108m
F=ma x=vt v=at
____1. The period of the solar activity cycle is:
a. 5 minutes b. 4.5 months c. 2.8 years d. 11 years e.325 years
_____ 2. 0K (zero degrees Kelvin) equals:
a. 212F b. -273C c. 273C d. -100C e. 100F
_____ 3. In the Sun energy is created by:
a. gravitational shrinkage.
b. the fusion of hydrogen into helium
c. the fusion of helium into hydrogen
d. the fission of helium into hydrogen
e. the fission of hydrogen into helium
_____ 4. Newton's Third law states that:
b. for every action there is an equal and opposite reaction
c. a body in motion will remain that way unless acted upon by an
_____ 5. The catastrophe theory for the formation of the solar system hypothesizes that:
a. the planets came from a near collision of the Sun and another star.
b. the planets were spontaneously ejected from the Sun
c. the planets formed as a natural side effect of the solar formation.
d. the Sun is infinitely old.
e. the solar system is a by-product of intergalactic nuclear war.
_____ 6. An apple dropping to Earth accelerates at 10m/s/s for 3 seconds. How fast is it going at the end of the 3 seconds?
a. .03m/s b. .3m/s c. 3m/s d. 30m/s e. 300m/s
_____ 7. Which lists the parts of the electromagnetic spectrum in order of increasing wavelength (longest last)?
a. infrared, ultraviolet, alpha-ray, gamma-ray
b. x-ray, gamma-ray, visible, infrared, radio
c. gamma-ray, x-ray, ultraviolet, infrared, radio
d. infrared, visible, ultraviolet, x-ray
e. none of these
_____ 8. The star Capella is yellow, Proxima Centauri is red, Procyon is green, Arcturus is orange, and Rigel is blue. Which is coolest?
a)Capella b)Proxima Cen c)Procyon d)Arcturus e)Rigel
_____ 9. The strongest known force is:
a) inertia b) electromagnetism c) strong nuclear d) gravity
_____ 10. As an interstellar cloud collapses, it forms into a:
a) sphere b) dodecahedron c) cube d) disk e) ring
11. (15 points) A planet is orbiting a neutron start at a distance of 1AU. The neutron star has the same mass as the Sun, but has collapsed to a radius of only 10km. How long is the orbital period of the planet?
12. (15 points) Halley's Comet falls from a very large distance toward
the Sun. How fast is it moving when it crosses the Earth's orbit?
13. (15 points) The universe has a mass of 3x1053kg, and a radius of 1.5x1026m. Calculate the orbital period and velocity of a galaxy. What is the significance of these numbers?
answers: 1d, 2b, 3b,4b, 5a, 6d, 7c, 8b, 9c, 10d
11) 1 year 12) 45km/s 13) P~10billion years = age of U, v=c