Matter falling onto a compact object, such as a neutron star or black hole,forms a(n):
a. accretion disk
b. binary star
c. gamma-ray burst
d. pulsar
e. magnetar
a
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Two alpha particles (helium nuclei) are separated by 
m. What is the magnitude of the force between the particles due to their charge?
A. 
B. 
C. 
D. 14 N
E. 58 N
Which of the following objects are probably not located in the same region of the solar system in which they originally formed?
A) Oort cloud comets B) Kuiper belt comets C) asteroids of the asteroid belt D) Pluto
The wave speed in an aluminum wire with a radius of 1.00 mm is 120 m/s. What is the tension in the wire? The density of aluminum is 2.70 × 103 kg/m3
A) 112 N B) 100 N C) 134 N D) 427 N E) 122 N
A charge of 20 nC is distributed uniformly along the x axis from x = -2.0 m to x = +2.0 m. What is the electric potential (relative to zero at infinity) at the point x = 5.0 m on the x axis?
a. 57 V b. 48 V c. 38 V d. 67 V e. 100 V