Final answer:
The density of the substance is calculated by dividing the mass (150000g) by the volume (1000m³, or 1,000,000,000 cm³) after converting all dimensions to the same unit. The final density is determined to be 0.00015 g/cm³.
Step-by-step explanation:
To calculate the density of a substance, you need to divide its mass by its volume. First, we must determine the volume. Since the dimensions of the object are given as 20m by 10m by 500cm, we need to convert all dimensions to the same units before multiplying them together. The conversion for centimeters to meters is 1m = 100cm, therefore 500cm is equal to 5m. Now, we can find the volume by multiplying the length, width, and height: Volume = 20m * 10m * 5m = 1000 cubic meters.
The mass of the substance is given as 150000g. To maintain consistent units for density calculations, we will keep mass in grams and volume in cubic centimeters. Since there are 1,000,000 cubic centimeters in one cubic meter, the volume in cubic centimeters is 1000 m³ * 1,000,000 cm³/m³ = 1,000,000,000 cm³. So, the density equation becomes: Density = Mass / Volume = 150000g / 1,000,000,000 cm³.
Now, performing the division, we get the density of the substance: Density = 150000g / 1,000,000,000 cm³ = 0.00015 g/cm³.