The number of radioactive nuclei in a particular sample decreases to one-eighth of its original number in 9 days. What is the half-life of these nuclei?
A) 9/8 days
B) 2 days
C) 3 days
D) 8 days
E) 10 days
C
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Changing the accelerating voltage of an x-ray machine without changing the target material must change:
a. the work function of the material. b. the wavelength of all the x-rays produced. c. the wavelength of the minimum wavelength x-ray that will be produced. d. Both b and c are correct.
An electron (m = 9.11 × 10^?31 kg) has a speed of 0.50 c. Determine the difference between its relativistic kinetic energy and the kinetic energy calculated without considering relativity
a. 3.0 × 10^?15 J b. 2.0 × 10^?15 J c. 1.5 × 10^?15 J d. 2.4 × 10^?15 J e. 1.8 × 10^?15 J
Venus has a thicker atmosphere than Earth
Indicate whether the statement is true or false
In a double-slit experiment using light of wavelength 486 nm, the slit spacing is 0.600 mm and the screen is 2.00 m from the slits. Find the distance along the screen between adjacent bright fringes