What are the differences between open star clusters and globular star clusters?
A.) Open clusters are more concentrated, older, and have more stars.
B.) Open clusters are less concentrated, older, and have fewer stars.
C.) Open clusters are less concentrated, younger, and have more stars.
D.) Open clusters are less concentrated, younger, and have fewer stars.
E.) Open clusters are more concentrated, younger, and have more stars.
Ans: D.) Open clusters are less concentrated, younger, and have fewer stars.
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Which of the following wavelengths could NOT be present as a standing wave in a 2-m-long organ pipe open at both ends?
A. 4 m B. 2 m C. 1 m D. 0.89 m E. 0.5 m
A conducting rod (length = 2.0 m) spins at a constant rate of 2.0 revolutions per second about an axis that is perpendicular to the rod and through its center. A uniform magnetic field (magnitude = 8.0 mT) is directed perpendicularly to the plane of rotation. What is the magnitude of the potential difference between the center of the rod and either of its ends?
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A firecracker breaks up into two pieces, one has a mass of 200 g and flies off along the x-axis with a speed of 82.0 m/s and the second has a mass of 300 g and flies off along the y-axis with a speed of 45.0 m/s
What is the total momentum of the two pieces? A) 361 kg?m/s at 56.3° from the x-axis B) 93.5 kg?m/s at 28.8° from the x-axis C) 21.2 kg?m/s at 39.5° from the x-axis D) 361 kg?m/s at 0.983° from the x-axis E) 21.2 kg?m/s at 56.3° from the x-axis
You are holding your physics book, pushing upwards on it with the palm of your hand. The reaction to the weight of the book is the force on __________ by __________
Fill in the blank(s) with correct word