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WorksheetsSignificant Figure Calculations
Total questions: 10
Worksheet time: 9mins
When adding and subtracting you need (a) the answer so that it has the (b) place value as the given value with the (c) accurate place value.
A student records the temperature of a sample. The starting temperature is 22.45 °C. They add heat, and the temperature rises by 13.2 °C. Later, the sample cools down by 1.37 °C. What is the final temperature of the sample? Report your answer with the correct number of significant figures.
34.3 °C
35.7 °C
35.65 °C
A student measures the volume of water in a graduated cylinder as 35.42 mL. They pour in another 10. mL of water. Later, 3.18 mL evaporates. What is the final volume of water in the cylinder? Report your answer with the correct number of significant figures.
42 mL
42.2 mL
40 mL
Two runners complete one lap around the track in 60 seconds. They run a second lap in 59.87 seconds. They then stop for a 3 second break. What is the total time recorded for the two laps and the break?
(a)
A laboratory keeps track of the electrical energy used for an experiment.
On the first day, the lab records an energy use of 1256.84 kWh.
On the second day, the lab adds another 874.3 kWh.
On the third day, an error is found, and 26.475 kWh must be subtracted from the total.
On the fourth day, the lab adds 913.62 kWh more.
Question: What is the total energy used by the lab after four days?
(a)
When multiplying or dividing, the answer is rounded to the same number of (a) as the number with the least number of (b) .
A metal cube has a mass of 52.84 g and a volume of 13.2 cm3.
What is the density of the cube? Report with the correct number of significant figures.
4 g/cm3
4.00 g/cm3
4.003 g/cm3
4.0 g/cm3
A block of wood has a length of 12.34 cm, a width of 3.2 cm, and a height of 4.56 cm.
What is its volume? Report with the correct number of significant figures.
180.07 cm3
180.1 cm3
180 cm3
180.06528 cm3
A car travels 425.6 km in 5.2 hours.
What is its average speed in km/h?
(a)
A chemistry student burns 13.82 g of fuel and measures that it releases 325.4 kJ of energy.
What is the energy released in kJ/g?
(a)
