An electrically neutral particle composed of two or more atoms chemically combined is called a(n) ______________
Fill in the blank(s) with correct word
molecule
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What is the primary way in which we determine the mass distribution of a spiral galaxy?
A) We construct its rotation curve by measuring Doppler shifts from gas clouds at different distances from the galaxy's center. B) We calculate its mass-to-light ratio. C) We apply Newton's version of Kepler's third law to the orbits of globular clusters in the galaxy's halo. D) We count the number of stars we can see at different distances from the galaxy's center.
A 60.0-Hz AC generator with a peak voltage of 110 V drives a series RC circuit with R = 10.0 ? and C = 300 ?F. The peak current in the circuit is
A. 8.24 A. B. 8.84 A. C. 11.0 A. D. 12.4 A. E. 23.5 A.
Regarding the Earth and a cloud layer 800 m above the Earth as the "plates" of a capacitor, calculate the capacitance if the cloud layer has an area of 1.0 km2 . If an electric field of 2.0 × 10^6 N/C makes the air break down and conduct electricity (lightning), what is the maximum charge the cloud can hold?
On any clear night, you can see 3 to 15 meteors per hour
a. True b. False Indicate whether the statement is true or false