The surface of the Sun is at approximately 5700 K, and the temperature of the Earth's surface is about 290 K. What total entropy change occurs when 2000 J of heat energy is transferred from the Sun to the Earth?
a. 5.78 J/K
c. 7.24 J/K
b. 5.97 J/K
d. 6.55 J/K
D
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Which of these is not a possible representation of electric field lines?
A. A
B. B
C. C
D. D
An object that is 10.0 cm tall is placed 37.0 cm in front of a concave mirror of focal length 18.5 cm. How tall is the image?
A) 2.5 cm B) 5.0 cm C) 7.5 cm D) 20.0 cm E) 10.0 cm
Which of the following explains why Polaris will no longer be the North Star 1,000 years from now?
A) Earth rotates once each day. B) Earth orbits the Sun once each year. C) The direction of Earth's axis in space precesses with a period of about 26,000 years. D) Stars appear to move randomly relative to our Sun in the local solar neighborhood. E) The universe is expanding.
The central core of the atom is called the ______________
Fill in the blank(s) with correct word