UCR PHYS007 Complete Poll Reviews

When the righthand clock reads 3 p.m., the left hand clock will read

• 3pm

• Later than 3 p.m. (e.g. 3:15 p.m.) time runs faster for clocks nearer to earth

• Earlier than 3 p.m. (e.g. 2:45 p.m.) time runs slower for the clock nearer to Earth

How far away is the Andromeda galaxy?

• 2.5 million light years

• 2.5 thousand light years

• 2.5 hundred light years

• 2.5 light years

How large is the visible universe?

• 46 trillion light years

• 46 billion light years

• 46 million light years

• 14 million light years

How large is the Local Group (in diameter)

• 3 million light years

• 3 billion light years

• 30 billion light years

• 300 billion light years

Suppose your mass is 45kg and your weight is 100 pounds. Now you travel to the surface of a planet with the same mass as earth but only half its radius. What are your mass and weight on this planet according to Newton?

• Mass=45kg; Weight=100 pounds

• Mass=45kg; Weight=25 pounds

• Mass=45kg; Weight=400 pounds

• Mass=180kg; Weight=100 pounds

• Mass=11.25kg; Weight=100 pounds

Answer explanation

According to Einstein, will the mass of an object be larger, smaller, or the same on the surface of the Earth compared to the surface of the moon?

• The mass of the object will be larger on Earth

• The mass of the object will be smaller on Earth

• The mass of the object will be the same on Earth as on the moon

Can the cosmological model of the Anaximander describe the retrograde motion of planets, at least qualitatively?

• Yes

• No

Answer explanation

Can the cosmological model of Philolaus describe the retrograde motion of planets, at least qualitatively?

• Yes

• No

The main reason Ptolemy introduced epicycles into Aristotle's geocentric model of the universe was to

• Mimic the effect of elliptical orbits

• Explain why the brightness of planets varies over time as seen from Earth

• Explain retrograde motion of planets

• Explain the parallax of Proxima Centauri

Which of the following is NOT attributable to Galileo

• First use of a telescope in astronomy

• Discover that planets move in elliptical orbits

• Discover of the moons of Jupiter (first irrefutable evidence that objects could orbit something other than Earth)

• Discovery that the Milky Way consists of a great multitude of individual stars

• First observation of the phases of Venus