The strong nuclear force is how many times as strong as the gravitation force?
A)
1038
B)
1 (They are the same.)
C)
2
D)
100
E)
106
A
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If all of the mass in the galaxy were concentrated at its center, then orbital velocity would be high near the center and would decline away from the center
Indicate whether the statement is true or false
The mass density of normal air is, at a particular temperature, 
If the average molecular mass of air is 29.0 u, how many air molecules are in spherical balloon of radius 15.0 cm?
a. 
b. 
c. 
d. 
e. 
f. 
The inks used in printing the full-color photos in a common magazine are
A) red, green, and blue. B) red, green, blue, and black. C) magenta, cyan, and yellow. D) magenta, cyan, yellow, and black. E) none of the above
A 1.5-kg mass attached to an ideal massless spring with a spring constant of 20.0 N/m oscillates on a horizontal, frictionless track
At time t = 0.00 s, the mass is released from rest at x = 10.0 cm. (That is, the spring is stretched by 10.0 cm.) (a) Find the frequency of the oscillations. (b) Determine the maximum speed of the mass. At what point in the motion does the maximum speed occur? (c) What is the maximum acceleration of the mass? At what point in the motion does the maximum acceleration occur? (d) Determine the total energy of the oscillating system. (e) Express the displacement x as a function of time t.