Stars at different distances from the galactic center revolve with different periods, an effect called _______________ rotation
Fill in the blank(s) with correct word
differential
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The site from which an airplane takes off is the origin. The x axis points east; the y axis points straight up. The position and velocity vectors of the plane at a later time are given by
?
m and 
m/s.
?
The plane is most likely
A. just touching down. B. in level flight in the air. C. ascending. D. descending. E. taking off.
A galvanometer has an internal resistance of 100 ? and deflects full-scale at 2.00 mA. What size resistor should be added to it to convert it to a millivoltmeter capable of reading up to 400 mV?
A) 50.0 ? in series B) 50.0 ? in parallel C) 75.0 ? in parallel D) 100 ? in series E) 100 ? in parallel
Which acid is present in vinegar?
a. HCl b. H3PO4 c. H2SO4 d. HC2H3O2
Quantum mechanics has accurately described the regularities of the periodic table by assigning "quantum" numbers to predict the allowed energy levels. The true statement about quantum numbers is that
A. no two electrons in the same atom can have the same set of quantum numbers. B. there are never more than 8 different sets of quantum numbers in an atom. C. they describe the position and charge of the electrons in the atoms. D. no electrons in the world can ever have the same set of quantum numbers.