Physics Measurement Units Quiz

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Which quantity is measured in kilograms?

Mass (correct)

Length

Time

Temperature

What is the derived SI unit for pressure?

Meter (m)

Newton (N)

Joule (J)

Pascal (Pa) (correct)

How is velocity expressed in SI derived units?

Mass/Volume

Force/Area

Length/Time (correct)

Mass x Acceleration

Which of the following is the base unit for temperature in the SI system?

Kelvin (K) Signup and view all the answers

What is the SI derived unit for energy?

Joule (J) Signup and view all the answers

Which quantity is measured in m²?

Area Signup and view all the answers

Which of the following represents the unit for electric current?

Ampere (A) Signup and view all the answers

What is the correct expression for density in SI derived units?

Mass/Volume Signup and view all the answers

What is the SI unit for volume?

Liters (L) Signup and view all the answers

What is the equivalent of 1 atmosphere in kilopascals?

101.325 kPa Signup and view all the answers

How is temperature converted from Celsius to Kelvin?

ToK = toC + 273 Signup and view all the answers

Which prefix represents $10^{-3}$ in the metric system?

Milli (m) Signup and view all the answers

In measuring a known standard mass of 100.00 g, a balance shows 78.55 g. What term describes this measurement?

Inaccurate but precise Signup and view all the answers

What does precision in measurements refer to?

Variability of repeated measurements Signup and view all the answers

What is the density of a substance with a mass of 250 g and a volume of 1500 mL?

0.166 g/mL Signup and view all the answers

Which of the following is a non-SI unit for energy?

Calorie (cal) Signup and view all the answers

What is the primary difference between accuracy and precision?

Precision requires more measurements to determine than accuracy. Signup and view all the answers

How many significant figures are in the number 0.00456?

3 Signup and view all the answers

How are trailing zeros treated when determining significant figures?

They are significant only if the number contains a decimal point. Signup and view all the answers

If the number 105.500 is rounded to three significant figures, what is the result?

106 Signup and view all the answers

Which of the following numbers has only two significant figures?

0.097 Signup and view all the answers

According to the significant figures rules, how many significant figures does the number 0.010205 have?

5 Signup and view all the answers

What should you do if you want to round the number 13.25 to one decimal place?

Round it to 13.3 Signup and view all the answers

When rounding the number 14.50 to the nearest whole number, which of the following is correct?

15 Signup and view all the answers

How many significant figures are in the value 0.003840?

4 Signup and view all the answers

What is the rounded value of 3.365 x 10^5 to three significant figures?

3.36 x 10^5 Signup and view all the answers

How many molecules are present in one mole of a substance?

6.022 x 10^23 Signup and view all the answers

What is the molar mass of a substance if its molecular weight is 46.1 amu?

46.1 g/mol Signup and view all the answers

If you have 2.55 moles of Cu, how many grams of Cu do you have based on its molar mass of 63.5 g/mol?

162 g Signup and view all the answers

When calculating the number of moles using the formula n = m / M.wt, what does 'm' represent?

Mass of the substance in grams Signup and view all the answers

What is the significance of the number 6.022 x 10^23 in chemistry?

It is Avogadro's number Signup and view all the answers

Which of the following statements about significant figures is correct?

Numbers with decimal points have significant trailing zeros Signup and view all the answers