A negatively charged rod is brought close to an uncharged electroscope. While the rod is close one's finger touches the far side of the metal ball on the electroscope. After the charged rod has been removed the finger is removed. The electroscope is
A. positively charged.
B. uncharged.
C. negatively charged.
Answer: B
Physics & Space Science
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A particle whose mass is 2 kg moves in the xy plane with a constant speed of 3 m/s along the direction 
. What is its angular momentum (in kg?m2/s) relative to the origin?
A.
0
B.
C.
-
D.
6
E.
?6
Physics & Space Science
The energy in the atmospheres of most of the jovian planets comes
A) almost entirely from their interiors. B) almost entirely from the Sun. C) both the Sun and their interiors, with both contributing significantly. D) tidal heating.
Physics & Space Science
All pulsars are neutron stars; why is the reverse not true?
What will be an ideal response?
Physics & Space Science
For the multiplication of 8.704 m × 3.14 m, the result should be reported with ______________ significant figures
Fill in the blank(s) with correct word
Physics & Space Science