Standing Sound Waves: An organ pipe that is 1.75 m long and open at both ends produces sound of frequency 303 Hz when resonating in its second overtone. What is the speed of sound in the room?
Fill in the blank(s) with the appropriate word(s).
354 m/s
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Star A has an apparent visual magnitude of 13.4 and star B has an apparent visual magnitude of 15.4 . Star A is ____ than star B
a. 2 times fainter b. 2 times brighter c. 6.3 times fainter d. 6.3 times brighter e. 29.8 times fainter
Earth's rotation is being gradually slowed by the Moon's gravity.
Answer the following statement true (T) or false (F)
A book rests on a table, and the table rests on the ground. Which of the following pairs of forces forms a force pair, or action-reaction pair, obeying Newton's law of force pairs?
A) Gravity pulling down on the table and the book pushing down on the table. B) The ground pushing up on the table and the book pushing down on the table. C) The table pushing up on the book and the book pushing down on the table. D) Gravity pulling down on the book and the book pushing down on the table. E) Gravity pulling down on the book and the table pushing up on the book.
A photon of blue light has ________ a photon of red light.
A. the same energy as B. more energy than C. less energy than