What will happen to our Hydrogen and Helium nuclei in order to form Hydrogen and Helium atoms?
A.) Have to add protons.
B.) Have to add neutrons.
C.) Have to add electrons.
D.) Have to add photons.
E.) Have to add down quarks.
Ans: C.) Have to add electrons.
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Opposing shearing forces of 3000 N are applied to the 3.00 cm × 4.00 cm faces of a 3.00 cm × 4.00 cm × 5.00 cm steel block. By what amount does the block become slanted? The shear modulus for steel is 8.0 × 1010 N/m2
A) 1.54 × 10-6 m B) 5.56 × 10-7 m C) 9.88 × 10-7 m D) 3.08 × 10-6 m E) 6.98 × 10-6 m
The enthalpy of mixing for a pair of polymer molecules is related to the _____________parameter of the two molecules.
Fill in the blank(s) with the appropriate word(s).
Vision Problems: A farsighted boy has a near point at 2.3 m and requires contact lenses to correct his vision to the normal near point. What is the correct choice of lens power for the contact lenses?
A. -0.28 diopters B. +0.28 diopters C. -3.6 diopters D. +3.6 diopters E. +1.8 diopters