An observer located at Earth's North Pole (90N
latitude) would observe that all of the stars
a) move eastward across the sky.
b) rise in the east and set in the west.
c) move in concentric circles about the North Star.
d) are completely stationary in the sky.
Question 2
A 0.40-kg particle moves under the influence of a single conservative force. At point A where the particle has a speed of 10 m/s, the potential energy associated with the conservative force is +40 J. As the particle moves from A to B, the force does +25 J of work on the particle. What is the value of the potential energy at point B?
a. +65 J
b. +15 J
c. +35 J
d. +45 J
e. 40 J
A scene from a kelp forest off the west coast of North America. Like terrestrial forests, kelp fores
The Sun is the nearest star to Earth.
Stars vary widely in size.
Layers are deposited parallel to Earth’s surface. Younger layers are deposited on top of older layer
The Schrader valve on this General Motors 3800 V-6 is located next to the fuel-pressure regulator.
Latitude versus Agricultural GDP per Agricultural Worker