The mass number (A) of a nuclide is equal to the number of ______________ in one of its nuclei
a. protons plus neutrons
b. protons
c. neutrons
d. neutrons plus electrons
a
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Dimensional Analysis: When subtracting several quantities
A. the quantities can have any combination of units. B. the quantities must all have exactly the same units. C. the quantities must all be dimensionless.
How fast is a galaxy at a distance of 3000 Mpc receding from us?
A: 216,000 km/s B: 3000 km/s C: 2400 km/s D: 24 km/s E: 24,000 km/s
A force of 17 N is applied to the end of a 0.63-m long torque wrench at an angle 45° from a line joining the pivot point to the handle. What is the magnitude of the torque about the pivot point produced by this force?
A) 7.6 N ? m B) 10.7 N ? m C) 12.0 N ? m D) 9.7 N ? m
The law of conservation of strangeness tells us that strangeness is not conserved for which of the following interactions?
a. strong b. electromagnetic c. weak d. All three of the above interactions conserve strangeness.