The zeroth latitude is at
a. 90°N.
b. 90°S.
c. the equator.
d. the Greenwich Meridian.
c
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If an object's mass is decreasing while a constant force is applied to the object, the acceleration
A) decreases. B) increases. C) remains the same.
A rock sample contains 1/4 micrograms of the parent radioactive isotope K-40 and 3/4 micrograms of its daughter isotope Ar-40. If the half-life of this decay is 1.25 billion years, how old is this rock?
A) 5.00 billion years B) 3.75 billion years C) 1.25 billion years D) 2.50 billion years
One mole of an ideal gas is held at a constant volume of 1 liter. Find the change in pressure if the temperature increases by 50°C.
A. 3 atm B. 4 atm C. 2 atm D. 1 atm E. 5 atm
In Bohr's model of the atom, electrons:
A) only make transitions between orbitals of specific energies. B) are not confined to specific orbits. C) are spread uniformly through a large, positive mass. D) can be halfway between orbits. E) move from orbit to orbit in many small steps.