A violin with string length 32 cm and string density 1.5 g/cm resonates with the first overtone from a 2.0-m long organ pipe with one end closed and the other end open. What is the tension in the string?
A) 1000 N
B) 110 N
C) 450 N
D) 4100 N
E) 56 N
A
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__________ show(s) that some quasars are further away than distant galaxies and that space time is curved by massive objects
a. Double-lobed radio galaxies b. Blazars c. The gravitational lens effect d. Head-tail galaxies e. Superluminal expansion
A circle is an ellipse with an eccentricity of ____
a. zero b. one c. two d. four e. eight
What observations demonstrate the existence of an interstellar medium?
What will be an ideal response?
Imagine a single charge q placed at one corner of a square, and that the electric field at the center of the square is F/q
If two other equal charges are placed at the adjacent corners of the square (leaving the opposite corner "blank"), the electric field at the center of the square is A) F/q. B) 4F/q. C) F/(2q). D) F/(4q). E) none of the above