Chapter 19, The Origin of the Solar System Video Solutions, Foundations of Astronomy

Problem 1

If you observed the solar system from the nearest star (1.3 pc), what would the maximum angular separation be between Jupiter and the sun? (Hint: Use the small-angle formula.)

Donald Albin

Numerade Educator

03:55

The brightest planet in our sky is Venus, which is sometimes as bright as apparent magnitude -4 when it is at a distance of about 1 AU. How many times fainter would it look from a distance of 1 parsec $(206,265 \text { AU) } ?$ What would its apparent magnitude be? (Hints:
Remember the inverse square law, from Chapter $5 ;$ also see Chapter $2 . .$

Supratim Roy

Numerade Educator

02:20

Problem 3

What is the smallest-diameter crater you can identify in the photo of Mercury on page $422 ?$ (Hint: See Appendix A, Properties of the Planets, to find the diameter of Mercury in kilometers.)

Cheyenne Whinham

Numerade Educator

01:31

Problem 4

A sample of a meteorite has been analyzed, and the result shows that out of every 1000 nuclei of potassium-40 originally in the meteorite, only 100 have not decayed. How old is the meteorite? (Hint: See Figure $19-6 .$

Crystal Wang

Numerade Educator

00:56

Problem 5

In Table $19-2,$ which object's observed density differs least from its uncompressed density? Why?

Sri Datta Vikas Buchemmavari

Numerade Educator

00:35

Problem 6

What composition might you expect for a planet that formed in a region of the solar nebula where the temperature was about $100 \mathrm{K}$ ?

Alexander Burbelo

Numerade Educator

02:30

Problem 7

Imagine that Earth grew to its present size in 1 million years through the accretion of particles averaging $100 \mathrm{g}$ each. $0 \mathrm{n}$ the average, how many particles did Earth capture per second? (Hint: See Appendix A to find Earth's mass.)

Penny Riley

Numerade Educator

01:37

Problem 8

If you stood on Earth during its formation as described in Problem 7 and watched a region covering $100 \mathrm{m}^{2}$, how many impacts would you expect to see in an hour? (Hints: Assume that Earth had its present radius. The surface area of a sphere is $4 \pi r^{2}$.)