Astudent measured the length of a piece of twine that was 35.84 mm long. her measurements were 37.52 mm, 37.54 mm, 37.57 mm and 37.55 mm. which of the following statements is true? a. the measurements were accurate but not precise. b the measurements were precise but not accurate. c. the measurements were both precise and accurate. d. the measurements were neither accurate nor precise.

Option B, The measurements were precise but not accurate.

Explanation:

Precision is the nearness in two or more measurements taken at a time.  

Here the measurements 37.52 mm, 37.54 mm, 37.57 mm and 37.55 mm are very close to each other. Hence they are precise

But since none to these measurements are close to the standard value 35.84 mm hence they are not accurate.  

Therefore, the measurements are precise but not accurate.

Option B is correct.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

the correct answer is b