At what frequency does a 0.32-H inductor have the same reactance as a 0.22-?F capacitor?
a. 3.8 × 10^3 Hz b. 3.6 × 10^5 Hz
c. 24 Hz d. 6.0 × 10^2 Hz
d
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The expansion of the Universe is accelerating
a. True b. False Indicate whether the statement is true or false
Discuss why astronomers no longer consider Pluto a planet
What will be an ideal response?
As part of an exercise program, a woman walks south at a speed of 2.00 m/s for 60.0 minutes. She then turns around and walks north a distance 3000 m in 25.0 minutes (a) What is the woman's average velocity during her entire motion?
A) 0.824 m/s south B) 1.93 m/s south C) 2.00 m/s south D) 1.79 m/s south E) 800 m/s south (b) What is the woman's average speed during her entire motion? A) 0.824 m/s B) 1.93 m/s C) 2.00 m/s D) 1.79 m/s E) 800 m/s What will be an ideal response?
Which statement is NOT true about open clusters?
A. After a molecular cloud has collapsed and formed many stars, the cloud dissipates and the stars spread out into an open cluster. B. Open clusters are gravitationally bound and therefore have a spherical shape. C. Open clusters typically contain dozens to hundreds of stars. D. Open clusters usually contain many blue stars.