What are significant figures?

Select the measurement with the correct number of significant figures.

Select the measurement with the correct number of significant figures.

How many significant figures are in the following measurement?

500 mL

How many significant figures are in the following measurement?

5.0 × 10² s

What is the following measurement rounded to 3 significant figures?

6.589 cm

What is the following measurement rounded to 3 significant figures?

584.49 s

What is the following measurement rounded to 5 significant figures?

787.985 kg

How many significant figures are in the result for the following calculation?

$$6.08\ kg\times5.0\ \frac{m}{s}$$  

How many significant figures are in the result for the following calculation?

$$\frac{65.3\ J}{50.085\ s}$$  

What is the result for the following calculation? Ensure that the correct number of significant figures are included in the calculated result.

$$25.085\ m\ +\ 16.2\ m$$  

What is the result of the following calculation? Ensure that the correct number of significant figures are included in the calculated result.

$$12.582\ s\ -\ 5.23\ s$$  

Which set of measurements demonstrates accuracy and precision if the true value is equal to 25.0 cm?

For significant figures, which term is the limiting term in the following calculation?

$$17.2\ g\ +\ 9\ g\ +\ 36.333\ g\ +\ 0.58\ g$$  

Acceleration of gravity has a magnitude of $$9.8\ \frac{m}{s^2}$$  

The resistance R of a resistor is determined by measuring the potential difference V across it and the current I in it. The value of R is then calculated using the equation

$$R=\frac{V}{I}$$  .
The values measured are V = 1.00 ± 0.05 V and I = 0.50 ± 0.01 A. What is the % uncertainty in the value of R?

In an experiment, a radio-controlled car takes 2.50 ± 0.05 s to travel 40.0 ± 0.1 m.

What is the car’s average speed and the uncertainty in this value?

A digital caliper is used to measure the 28.50 mm width of a plastic ruler. The digital caliper reads to the nearest 0.01 mm.

What is the correct way to record this reading?

The first length measured in a laboratory experiment is 2.5 + 0.1 m and the second length 3.4 + 0.1 m. What is the uncertainty of the sum of the lengths?

A quantity x is to be determined from the equation

x = P-Q.

P is measured as 1.27 ± 0.02 m and Q is measured as 0.83 ± 0.01 m.

What is the percentage uncertainty in x to one significant figure?

According to the uncertainty, which value is a possible correct measurement of the pink bar?

How many uncertain digits should the measurement of the pink bar have?

Which measuring device is the most precise?