Even if the Universe has no edge, it has a center
a. True
b. False
Indicate whether the statement is true or false
False
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For a galaxy to be active, the supermassive black hole needs to have matter flow into it
a. True b. False Indicate whether the statement is true or false
A proton is first accelerated from rest through a potential difference V and then enters a uniform 0.750-T magnetic field oriented perpendicular to its path. In this field, the proton follows a circular arc having a radius of curvature of 1.84 cm
What was the potential difference V? (mproton = 1.67 × 10-27 kg, e = 1.60 × 10-19 C)
What is created by the fusion of three helium nuclei?
B) oxygen C) carbon D) nitrogen E) iron
If a = 60 cm, b = 80 cm, Q = ?6.0 nC, and q = 3.0 nC in the figure, what is the magnitude of the electric field at point P?
a.
71 N/C
b.
56 N/C
c.
60 N/C
d.
53 N/C
e.
67 N/C