An iron ball and a wooden ball of the same size are dropped from a tall tower. Taking air resistance into consideration, the object to hit the ground first will be the

A) lighter wooden ball.
B) heavier iron ball.
C) both hit at the same time.
D) not enough information


Answer: B

Physics & Space Science

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Fill in the blank(s) with the appropriate word(s).

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A) +2.7 D B) -2.7 D C) +5.3 D D) -5.3 D

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Double-Slit Interference: The distance between two slits is 1.50 × 10-5 m. A beam of coherent light of wavelength 600 nm illuminates these slits, and the distance between the slit and the screen is 2.00 m. What is the distance on the screen between the central bright fringe and the fourth-order bright fringe?

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Meters: A galvanometer with a coil resistance of 80 ? deflects full-scale for a current of 2.0 mA. What series resistance is required to convert it to a voltmeter reading full scale for 200 V.

A. 100 m? B. 0.80 m? C. 13 M? D. 250 k? E. 100 k?

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