A radioactive atom has 98 protons and 249 nucleons. If it undergoes alpha decay, what are the number of protons and nucleons, respectively, in the daughter nucleus?
A) 96, 247 B) 94, 247 C) 96, 245 D) 100, 249 E) 100, 245
C
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X-rays with an energy of 400 keV undergo Compton scattering from a target. The scattered rays are deflected at an angle of 38° relative to the direction of the incident rays.What is the kinetic energy of the recoiling electrons?
a. 56.9 J b. 51.5 J c. 34.3 J d. 13.7 J
The light reflected from a soap bubble (n = 1.40) appears red (? = 640 nm) at its center. What is the minimum thickness (in nm)?
a. 124 b. 104 c. 114 d. 134 e. 234
In spite of its high temperature, we observe the solar corona best during ________
Fill in the blank(s) with correct word
Answer the following statement(s) true (T) or false (F)
1. The angular momentum of a particle can be nonzero even if it moves in a straight line. 2. The angular momentum (around a rotating rigid object’s center of mass) of an arbitrary particle in that object points directly along the object’s rotation axis.