When subtracting, the result should be rounded to the least number of decimal places. 5.00 has two decimal places and 2.1 has one, so the result should be rounded to one decimal place: 5.00 - 2.1 = 2.90 becomes 2.9.

6.022 rounded to 3 significant figures is 6.02.

6.022 rounded to three significant figures is 6.02 × 10^23.

The result should be rounded to one decimal place, giving 12.4.

When adding, the result should be rounded to the least number of decimal places. 12.11 has two decimal places and 0.3 has one, so the result should be rounded to one decimal place: 12.41 becomes 12.4.

In division, the result should have the same number of significant figures as the measurement with the least significant figures. 100.0 has 4 significant figures and 4.00 has 3 significant figures, so the answer should be 25.0 with 3 significant figures.

150.0 has four significant figures and 3.00 has three significant figures. The result should be reported with three significant figures: 50.0.

In division, the result should have the same number of significant figures as the measurement with the least significant figures. 6.38 has 3 significant figures and 2.0 has 2 significant figures, so the answer should be rounded to 2 significant figures: 3.19 becomes 3.2.

In division, the result should have the same number of significant figures as the measurement with the least significant figures. 8.0 has 2 significant figures and 2.00 has 3 significant figures, so the answer should be 4.0 (2 significant figures).

In multiplication, the result should have the same number of significant figures as the factor with the least significant figures. 6.02 x 10^23 has 3 significant figures and 3.0 has 2, so the answer should be 1.8 x 10^24.

In subtraction, the result should be rounded to the least number of decimal places. 10.0 has one decimal place and 5.00 has two, so the result should be rounded to one decimal place: 5.0.

In subtraction, the result should be rounded to the least number of decimal places. 10.0 has one decimal place and 5.678 has three, so the result should be rounded to one decimal place: 4.32 becomes 4.3.

The SI unit of force is Newton (N), which is defined as the force required to accelerate a 1 kg mass by 1 m/s².

The SI unit of length is the meter.

The SI unit of time is the second.

The standard acceleration due to gravity is approximately 9.81 m/s².

The standard unit of temperature in the SI system is Kelvin (K).

To convert grams to kilograms, divide by 1000. The uncertainty in kilograms is 0.5 g / 1000 = 0.0005 kg.

Area = length² = (5.00 cm)² = 25.00 cm². The uncertainty in area is calculated using the formula: ΔA = 2LΔL = 2(5.00 cm)(0.02 cm) = 0.20 cm².

When adding, the uncertainties are added: 0.1 cm + 0.1 cm = 0.2 cm.

The SI unit of force is the Newton.

The SI unit of mass is the kilogram.

The SI unit of pressure is Pascal (Pa), defined as one newton per square meter (N/m²).

1 astronomical unit (AU) is approximately equal to 1.496 × 10^11 meters, which is the average distance from the Earth to the Sun.

1 Joule is defined as 1 kg·m²/s², which is the product of mass, distance squared, and time squared.

1 light year is the distance light travels in one year, which is approximately 9.46 × 10^15 meters.

Planck's constant is approximately 6.626 x 10^-34 Joule seconds.

1 liter is equal to 0.001 cubic meters.

Volume = side³ = 2³ = 8 m³.

The volume of a cube is given by side³, so 3 cm³ = 27 cm³.