A horizontal uniform 1.20-N meter stick is held up by two vertical strings, one at the 20-cm mark and the other at the 60-cm mark. What is the tension in the string at the 60-cm mark?
a. 0.30 N
b. 0.45 N
c. 0.60 N
d. 0.90 N
e. 1.0 N
d
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The relative permittivity is also called the _________constant.
Fill in the blank(s) with the appropriate word(s).
A 150. ?A full scale galvanometer is used as a 1.00 A full scale ammeter when shunted by 3.3 m?. What is the coil resistance of the galvanometer?
What will be an ideal response?
Which of the following statements about nuclear fusion is not true?
A. It involves two or more small atomic nuclei slamming into each other and sticking together to make a larger atomic nucleus. B. It refers solely to the process of converting hydrogen into helium. C. It is the process that has made most of the elements of which we and the Earth are made. D. It is the process that generates the energy by which our Sun shines.
A small sphere attached to a light rigid rod rotates about an axis perpendicular to and fixed to the other end of the rod. Relative to the positive direction of the axis of rotation, the angular positions of the sphere are positive, its angular velocity is positive, and its angular acceleration is negative. The sphere is
a. rotating clockwise and slowing down. b. rotating counterclockwise and slowing down. c. rotating clockwise and speeding up. d. rotating counterclockwise and speeding up. e. first rotating clockwise and then counterclockwise.