Shapley found the Sun is located about half way out the disc from the center of the disk of the Galaxy
Indicate whether the statement is true or false
TRUE
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When a rocket forces exhaust gases downward, the exhaust gases
A) as the name implies, soon exhaust their influence. B) play no further role in the motion of the rocket. C) exert an upward force on the rocket.
Compared to Ida, Eros, and Gaspra, what was odd about Mathilde?
A) It had a small moon, so we could more accurately find its mass. B) It was much denser, probably made of iron and nickel, a class M asteroid. C) It was less dense than water, indicating it was a comet nucleus, rather than an asteroid. D) It was less dense than rock, but more than ice, suggesting a porous structure. E) It was the same density as the Earth's Moon, indicating it had been knocked off our Moon.
Three long, straight, parallel wires all lie in the yz plane and each carries a current of 20 A in the positive z direction. The two outer wires are each 4.0 cm from the center wire. What is the magnitude of the magnetic force on a 50-cm length of either of the outer wires?
a. 1.0 mN b. 0.50 mN c. 1.1 mN d. 1.5 mN e. 2.0 mN
What is the characteristic that distinguishes fermions from bosons?
A) their mass B) their electric charge C) their spin D) their size E) their speed of travel