Homogeneous mixtures are those mixtures that have variable but ______________ composition
Fill in the blank(s) with correct word
uniform
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Radioactivity Basics: A radioactive isotope of atomic number Z emits an alpha particle, and the daughter nucleus then emits a beta-minus particle. What is the atomic number of the resulting nucleus?
A. Z - 1 B. Z + 1 C. Z - 2 D. Z - 3
Two point charges q1 = 4.0 ?C and q2 = -8.0 ?C are placed along the x-axis at x1 = 0 m and x2 = 0.20 m, respectively. What is the electric potential energy of this system of charges?
A) +1.4 J B) -1.4 J C) -32 J D) 4.0 J E) -4.0 J
If the sum of the external forces on an object is zero, then the sum of the external torques on it must also be zero
A) True B) False
An electron is trapped in an infinite square well (a box) of width 6.88 nm
Find the wavelength of photons emitted when the electron drops from the n = 5 state to the n = 1 state in this system. (c = 3.00 × 108 m/s, h = 6.626 × 10-34J ? s, mel = 9.11 × 10-31 kg) A) 6.49 ?m B) 5.45 ?m C) 5.91 ?m D) 7.07 ?m