The rotational inertia of your leg is greater when your leg is
A) straight.
B) bent.
C) same either way
Answer: A
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______________ are cool, with temperatures of about 100 K and densities of ten to a few hundreds of atoms per cubic centimeter
Fill in the blank(s) with correct word
The halo in the spherical component of the Milky Way contains about _____ as many stars as the disk of the galaxy
A) 2 percent B) 6 percent C) 10 percent D) 14 percent
This painting shows a futuristic spacecraft powered by the detonation of small hydrogen bombs. If we actually had such a spacecraft, what would it allow us to do?
A) It would allow us to make a one-way trip to the nearest star besides the Sun in about a century. B) It would allow us to travel roundtrip to almost anywhere in the Milky Way Galaxy in just a few years of ship time. C) It would allow us to travel from Earth to Mars in less than an hour. D) It would allow us to travel up to several times faster than the speed of light.
A +15-nC point charge is placed on the x axis at x = 1.5 m, and a ?20-nC charge is placed on the y axis at y = ?2.0m. What is the magnitude of the electric field at the origin?
a. 105 N/C b. 15 N/C c. 75 N/C d. 45 N/C e. 60 N/C