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Pathways to Astronomy

Stephen E. Schneider

Chapter 7

The Time of Day - all with Video Answers

Educators

Chapter Questions

01:26

Problem 1

Your friend lives in a town at a longitude $5^{\circ}$ to the east of you. Both of you define "noon" as when the Sun reaches its highest point in the sky. How do your clocks differ from each other?

Amy Jiang
Amy Jiang
Numerade Educator
02:43

Problem 1

If Russia had all clocks set to Moscow time (time zone +3 in Figure 7.4 ), instead of using many time zones, what time would the Sun rise at the easternmost tip of Siberia on the equinoxes? Examining Figure $7.4,$ what places in the world have the Sun crossing the meridian earliest according to local time? What places have it latest?

Jason Herrera
Jason Herrera
Numerade Educator
02:43

Problem 2

If Russia had all clocks set to Moscow time (time zone +3 in Figure 7.4 ), instead of using many time zones, what time would the Sun rise at the easternmost tip of Siberia on the equinoxes? Examining Figure $7.4,$ what places in the world have the Sun crossing the meridian earliest according to local time? What places have it latest?

Jason Herrera
Jason Herrera
Numerade Educator
02:43

Problem 2

If Russia had all clocks set to Moscow time (time zone +3 in Figure 7.4 ), instead of using many time zones, what time would the Sun rise at the easternmost tip of Siberia on the equinoxes? Examining Figure $7.4,$ what places in the world have the Sun crossing the meridian earliest according to local time? What places have it latest?

Jason Herrera
Jason Herrera
Numerade Educator
01:28

Problem 5

It is thought that the angle of the Earth's axis varies by a few degrees over tens of thousands of years. If the angle were $20^{\circ}$ instead of $23.5^{\circ}$, what would be the angle of the noontime Sun from the horizon at your own latitude on the solstices?

Prabhu Ramji
Prabhu Ramji
Numerade Educator
00:49

Problem 6

What is your longitude, and what is the longitude of the center of the nearest time zone? Calculate what time the Sun should, on average, cross your own meridian, assuming that the Sun crosses the meridian at exactly 12: 00 at the center of your time
zone.

Chris Johnson
Chris Johnson
Numerade Educator