Suppose we imagine the Sun to be about the size of a grapefruit. Which of the following best describes the size and distance of Earth on the same scale?
A) Earth is the size of a tip of a ballpoint pen about 1 meter from the Sun.
B) Earth is the size of a golf ball about 1 meter from the Sun.
C) Earth is the size of a tip of a ballpoint pen about 15 meters from the Sun.
D) Earth is the size of a golf ball about 15 meters from the Sun.
E) Earth is the size of a marble about 25 miles from the Sun.
C) Earth is the size of a tip of a ballpoint pen about 15 meters from the Sun.
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Assume that the average speed for the molecules within a sample of gas is 150 m/s. What would be possible values for the root-mean-square and most-probable speeds?
1. vrms = 162 m/s, vmp = 132 m/s 2. vrms = 132 m/s, vmp = 162 m/s 3. vrms = 150 m/s, vmp = 150 m/s 4. vrms = 182 m/s, vmp = 162 m/s
Suppose you are facing a tall makeup mirror on a vertical wall. Fluorescent tubes framing the mirror carry a clockwise electric current. What is the direction of the magnetic field created by that current at the center of the mirror?
1.left 2.right 3.horizontally toward you 4.horizontally away from you 5.no direction because the field has zero magnitude
The modern view of reality states that what is "real" depends on our points of view.
Answer the following statement(s) true (T) or false (F)
Weight and g: The earth has radius R. A satellite of mass 100 kg is in orbit at an altitude of 3R above the earth's surface. What is the satellite's weight at the altitude of its orbit?
A. 61 N B. 110 N C. 9000 N D. 16,000 N