2.5 meters is equal to 250 centimeters.

2.5 m is equal to 2500 millimeters.

2.5 m is equal to 2500 mm (2.5 m × 1000 mm/m).

The uncertainty is 0.1 cm, as the last digit is in the tenths place.

The absolute error is given as 5 m.

Maximum possible error is equal to the uncertainty, which is ±0.2 cm.

Minimum possible mass = Measured value - Error = 75 - 0.5 = 74.5 kg

Leading zeros are not significant. The significant figures are 4, 5, 6, which gives a total of 4 significant figures.

The measurement 0.00780 m has three significant figures (the zeros before the 7 are not significant, but the zero after the 8 is).

The leading zeros are not significant, but the trailing zero after 78 is significant. Therefore, it has 3 significant figures.

Leading zeros do not count as significant figures. The significant figures in 0.007890 are 7, 8, 9, and 0, which totals to 4 significant figures.

The number 1500 m has 2 significant figures unless specified otherwise (e.g., with a decimal point). Without a decimal, trailing zeros are not counted.

Without a decimal point, trailing zeros are not considered significant. Therefore, 1500 has 2 significant figures.

Total time range = 15.0 ± 0.5 = 14.5 s to 15.5 s.

Maximum possible temperature = Measured value + Error = 25 + 0.5 = 25.5°C.

Minimum temperature = Recorded temperature - Error = 25 - 0.5 = 24.5°C.

Maximum possible temperature = Measured value + Error = 100 + 0.5 = 100.5°C.

Range of possible volumes = 200 - 5 to 200 + 5 = 195 L to 205 L.

Maximum true weight = Measured weight + Error = 10 kg + 0.2 kg = 10.2 kg.

Relative error = (absolute error / measured value) = 0.5 / 30 = 0.0167.

Uncertainty in area = 2 * length * uncertainty in length = 2 * 10 * 0.1 = 2 m².

Circumference = 2πr. Measured circumference = 31.4 cm. Thus, r = 31.4 / (2π) ≈ 5.0 cm.

Percentage error = (Absolute error / Measured value) * 100 = (0.2 / 31.4) * 100 ≈ 0.64%.

Relative uncertainty = (absolute uncertainty / density) = 0.2 / 8.0 = 0.025.

Volume = mass/density; if mass is constant, the absolute error in volume = (mass * absolute error in density) / (density²).

Fractional error = (absolute error / measured value) = 0.1 / 8.0 = 0.0125.

The absolute error is given directly as ±0.1 g/cm³.

Relative uncertainty = (absolute uncertainty / measured value) = 0.2 / 8.0 = 0.025.

Range = (8.0 - 0.5) to (8.0 + 0.5) = 7.5 to 8.5 g/cm³.

Relative uncertainty = (absolute uncertainty / measured value) = 0.1 / 8.0 = 0.0125.