A violin with string length 32 cm and string density resonates in its fundamental with the first overtone of a 2.0-m organ pipe with one end closed and one end open. What is the tension in the string if the speed of sound in air is 344 m/s?
A) 110 N B) 4100 N C) 56 N D) 1000 N E) 450 N
D
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____________ are located beyond the asteroid belt (3 AU) from the Sun, have extremely large masses and very low densities
a. Comets b. Extrasolar planets c. Asteroids d. Terrestrial planets e. Jovian planets
What are the two fundamental laws that lie at the heart of quantum mechanics?
A) (1) the uncertainty principle and (2) the exclusion principle B) (1) the absoluteness of the speed of light and (2) the equivalence principle C) (1) the law of conservation of energy and (2) the electromagnetic force law D) (1) the law of conservation of angular momentum and (2) the law of conservation of energy
An object weighing 44.1 N hangs from a vertical massless ideal spring. When set in vertical motion, the object obeys the equation y(t) = (6.20 cm) cos[(2.74 rad/s)t - 1.40]. (a) Find the time for this object to vibrate one complete cycle
(b) What are the maximum speed and maximum acceleration of the object? (c) What is the TOTAL distance the object moves through in one cycle? (d) Find the maximum kinetic energy of the object. (e) What is the spring constant of the spring?
Alice is floating freely in her spacecraft, and you are accelerating away from her with an acceleration of 1g. Suppose you claim that you are feeling the effects of a gravitational field. How can you explain the fact that Alice is weightless?
A) She is weightless because she is moving at constant velocity. B) She is weightless because she is in a not moving. C) She is weightless because she is in free-fall. D) If you are in a gravitational field, then she cannot be weightless.