You push on a wall, and the wall pushes back on you with the same force. This is an example of Newton's third law
a. True
b. False
Indicate whether the statement is true or false
True
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Black hole jets are believed to be focused and confined by the enclosing magnetic _______________
Fill in the blank(s) with correct word
A variable resistor has a voltage of 12.0 V placed across it. If the resistance is increased 20%, what happens to the current through it?
A. it increases 20% B. it increases 25% C. it decreases 20% D. it decreases 25% E. it decreases 17%
An eyeglass lens is cut with one surface having a radius R1 and the other surface having a radius R2, with R1 < R2 . Both positive radii are measured from the same side with R1 being the side closer to the eye. Is this convex-concave lens a converging lens or a diverging lens?
a. This is a converging lens. b. This is a diverging lens. c. This can be either a converging or diverging lens, as more information is needed for a final determination. d. This is neither, since a lens cannot be made this way.
The luminosity of a star is the total amount of energy it radiates each second
a. True b. False Indicate whether the statement is true or false