A radioactive isotope that emits an alpha particle will change in what respect?
a. Atomic number decreases by four.
b. Both choices a and b are valid. c. Mass number decreases by four.
d. None of these choices are valid.
C
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Oceans are about four times as deep as mountains are high. At the bottom of the ocean are
A) towering mountains, deep valleys, and deep trenches near the continental borders. B) thick layers of basaltic crust at mid-ocean ridges that gradually thin near deep ocean trenches. C) towering plutonic mountains created from volcanoes and fissures at oceanic ridge areas. D) all of these
A celebrating student throws a water balloon horizontally from a dormitory window that is 50 m above the ground. It hits the ground at a point 60 m from the building. Ignore air
(a) What will be the horizontal component of the velocity of the balloon just before it hits the ground? (b) What will be the magnitude of the vertical velocity of the balloon just before it hits the ground?
Refer to the figure above. Suppose that an electron makes a transition from n = 3 to n = 2 and emits a photon of frequency 4 × 1014 Hz. Then an electron that makes a transition from n = 3 to n = 1 may emit a photon with a frequency of
1) 1 × 1014 Hz, 2) 3 × 1014 Hz, 3) 4 × 1014 Hz, 4) 9 × 1014 Hz, which is consistent with emission of the most energetic photon from a transition from n = 3 to 5) n = 1. 6) n = 2. 7) either, as both transitions are equivalent.
Describe the belt-zone circulation on Jupiter
What will be an ideal response?