Consider the decay ?+ ? ?+ + ?. This decay is
A) forbidden because conservation of baryon number is violated.
B) forbidden because conservation of mass is violated.
C) forbidden because conservation of energy is violated.
D) allowed.
E) forbidden because conservation of lepton numbers is violated.
E
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A stonecutter's chisel has an edge area of 0.7 cm2 . If the chisel is struck with a force of 42 N, what is the pressure exerted on the stone?
a. 600 N/m2 b. 30 000 N/m2 c. 300 000 N/m2 d. 600 000 N/m2 e. 6 000 N/m2
Find the frequency of X-rays of wavelength 1 Å = 10-10 m
a. 3 × 10^18 Hz b. 3 × 10^10 MHz c. 6 × 10^9 Hz d. 3 × 10^8 Hz e. 3 × 10^20 Hz
The ratio of the numbers of neutrons to protons in the nucleus of naturally occurring isotopes tends to vary with atomic number in what manner?
a. increases with greater atomic number b. decreases with greater atomic number c. is maximum for atomic number = 60 d. remains constant for entire range of atomic numbers
In stainless steel, _________is added to stabilize the austenitic phase.
Fill in the blank(s) with the appropriate word(s).