Which formula is dimensionally consistent with an expression yielding a value for velocity? (v is velocity, x is distance, and t is time)
a. v/t2
c. v2/t
b. vx2
d. v2t/x
D
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A crystal diffracts a beam of electrons, like a diffraction grating, as they hit it perpendicular to its surface. The crystal spacing is 0.18 nm, and the first maximum scattering occurs at 80° relative to the normal to the surface
(e = 1.60 × 10-19 C, melectron = 9.11 × 10-13 kg, h = 6.626 × 10-34 J ? s) (a) What is the wavelength of the electrons? (b) What potential difference accelerated the electrons if they started from rest?
In beta minus decay, the number of protons in the nucleus is
A) decreased by 1. B) decreased by 2. C) increased by 1. D) increased by 2. E) remains unchanged.
A particle with a mass of 3.0 kg is accelerated to a speed of 0.80. The mass of this particle is now:
A. Greater than 3.0 kg B. Less than 3.0 kg C. Still 3.0 kg
Radioactivity Basics: Starting with 
U, assume that the following three decays occur in sequence:(1) alpha decay(2) beta-minus decay(3) alpha decayDetermine the correct isotope that is left after each decay.
What will be an ideal response?