Deneb's estimated distance of 1400 light-years comes from spectroscopic parallax measurements
Indicate whether the statement is true or false
TRUE
Physics & Space Science
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Planet X-39 has a mass equal to 1/3 that of Earth and a radius equal to 1/3 that of Earth. If V is the escape speed for Earth, what is the escape speed for X-39?
A) V B) 3V C) 6V D) V/9 E) 9V
Physics & Space Science
If a = 1.0 cm, b = 3.0 cm, and I = 30 A, what is the magnitude of the magnetic field at point P?
a.
0.62 mT
b.
0.59 mT
c.
0.35 mT
d.
0.31 mT
e.
0.10 mT
Physics & Space Science
A quark can have a charge of
A) -3/2 e. B) -e/2. C) -1/3 e. D) -e/4. E) -3/4 e.
Physics & Space Science
A block of wood with a piece of iron tied to the top of it floats in a bucket of water. If the wood and iron are turned over so that the iron is submerged beneath the wood, the water level at the side of the bucket
A) rises. B) falls. C) remains the same.
Physics & Space Science