Three equal charges of magnitude + 4.00 ?C are placed at the corners of an equilateral triangle of side 2.00 cm. What is the electric field potential energy of the system of these charges?
A) 90.0 J
B) 900 mJ
C) 0 J
D) 216 mJ
E) 21.6 J
E
Physics & Space Science
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The hydrogen in our solar system was created from subatomic particles in
a. the Earth. b. our Sun. c. Jupiter. d. the big bang. e. supernovae.
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The power of American automobiles is usually rated in "horsepower." What other units could be used?
A) watts B) joules C) Calories D) None of the above. E) All of the above.
Physics & Space Science
A magnifying glass can be made from a diverging lens
Indicate whether the statement is true or false
Physics & Space Science
An un-stretched hanging spring is 50 cm long. Suspending a 100-N block from it increases its length to 60 cm. Adding another 100-N block makes the spring's length
A) 60 cm. B) 70 cm. C) 80 cm. D) 100 cm. E) 120 cm.
Physics & Space Science