If aqueous solutions of lead(II) nitrate and sodium sulfate, which insoluble precipitate is formed?
Select one:
a. NaNO3
b. Na2NO3
c. PbSO4
d. Pb2SO4
e. PbS

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.

Which correctly identifies the parts of a transverse wave? a: crest b: amplitude c: wavelength d: trough a: trough b: amplitude c: crest d: wavelength a: trough b: amplitude c: wavelength d: crest a: crest b: amplitude c: trough d: wavelength