By scattering alpha particles from gold, Rutherford showed the atomic nucleus to be very
A) small relative to the atom.
B) massive relative to the mass of an electron.
C) both of these
D) neither of these
Answer: C
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The Mid-Atlantic Ridge separates the South American plate and the African plate at a divergent plate boundary.
Indicate whether the statement is true or false.
Seyfert galaxies
a. are more common in close pairs of galaxies than in isolated systems. b. emit more energy at X-ray, ultraviolet, infrared, or radio wavelengths than normal spiral galaxies. c. generally show red shifts greater than 6. d. a and b e. a, b and c
Gravitational Force: A very dense 1500-kg point mass (A) and a dense 1200-kg point mass (B) are held in place 1.00 m apart on a frictionless table. A third point mass is placed between the other two at a point that is 20.0 cm from B along the line connecting A and B. When the third mass is suddenly released, find the magnitude and direction (toward A or toward B) of its initial acceleration. (G = 6.67 × 10-11 N ? m2/kg2)
What will be an ideal response?
Why do some radio galaxies appear to have lobes while some do not?
What will be an ideal response?