numerical on mass density, weight density and specific gravity

TL;DR

The video explains how to calculate the specific weight, mass density, and specific gravity of a given oil.

Transcript

hello friends in this video we are going to see a numerical based on the concept of specific weight mass density and specific gravity so let us move on to video let's see the example if 5 meter cube of certain oil weights 40 kilo Newton here a 5 meter cube if we observe the unit's meter cube it means the volume is given to us as 5 meter cube and it... Read More

Key Insights

• 💆 Specific weight is the weight per unit volume of a substance, while mass density is the mass per unit volume.
• 🏋️ Specific weight can be calculated by dividing the weight of the substance by its volume.
• 💆 Mass density can be calculated by dividing the specific weight of the substance by the acceleration due to gravity.
• 🏋️ Specific gravity is a ratio that compares the weight of a substance to the weight of water.

Questions & Answers

Q: What is specific weight?

Specific weight is the ratio of weight to volume, often expressed in Newtons per meter cube. It represents how heavy a substance is per unit volume.

Q: How can we calculate the specific weight of the oil?

To calculate the specific weight of the oil, we divide the weight of the oil (converted to Newtons) by the volume of the oil in meters cube.

Q: What is mass density?

Mass density is the ratio of mass to volume. It represents the mass of a substance per unit volume.

Q: How can we calculate the mass density of the oil?

To calculate the mass density of the oil, we divide the specific weight of the oil by the acceleration due to gravity, using the formula: mass density = specific weight of oil / acceleration due to gravity.

Q: What is specific gravity?

Specific gravity is the ratio of the specific weight of a substance to the specific weight of water, or the ratio of the mass density of a substance to the mass density of water. It represents how heavy a substance is compared to water.

Q: How can we calculate the specific gravity of the oil?

To calculate the specific gravity of the oil, we divide the specific weight of the oil by the specific weight of water, using the formula: specific gravity of oil = specific weight of oil / specific weight of water.

Q: Does specific gravity have a unit?

No, specific gravity is a ratio and does not have a unit. It is simply a comparison of the weight of a substance to the weight of an equal volume of water.

Q: What does it mean if the specific gravity is less than 1?

If the specific gravity is less than 1, it means that the substance is lighter than water. In this case, the oil is lighter than water.

Summary & Key Takeaways

• The video introduces the concept of specific weight, mass density, and specific gravity.

• It provides an example of calculating the specific weight of a certain oil.

• The video also explains how to calculate the mass density and specific gravity of the oil.