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1 day ago · The density of air at sea level is about 1.2 kg/m 3 (1.2 g/L, 0.0012 g/cm 3). Density is not measured directly but is calculated from measurements of temperature, pressure and humidity using the equation of state for air (a form of the ideal gas law ).
5 days ago · To calculate the specific gravity of a substance, follow these easy steps: Isolate a known volume of the substance: V. Use a scale to measure the mass of that volume: m. Calculate the density of the substance with the ratio: ρ = m/V. Choose your reference substance and calculate its density: ρ₀ = m₀/V₀.
4 days ago · Archimedes’ principle, physical law of buoyancy stating that any body submerged in fluid (gas or liquid) at rest is acted upon by an upward, or buoyant, force, the magnitude of which is equal to the weight of the fluid displaced by the body. Learn more in this article.
- The Editors of Encyclopaedia Britannica
- King Heiron II of Syracuse had a pure gold crown made, but he thought that the crown maker might have tricked him and used some silver. Heiron aske...
- A body at rest in a fluid is acted upon by a force pushing upward called the buoyant force, which is equal to the weight of the fluid that the body...
- Archimedes’ principle is very useful for calculating the volume of an object that does not have a regular shape. The oddly shaped object can be sub...
- The buoyancy force (B) is equal to the weight (W) of the fluid that a body in that fluid displaces. The weight W can be written in terms of the den...
3 days ago · Therefore, at higher altitudes the density of air decreases and at the lower levels the density is more. Note: Do not be confused with altitude and height where altitude refers to actual elevation above mean sea level and it is the indicated altitude corrected for the non – standard temperature and pressure and the term height refers to ...
2 days ago · At concentrations above 0.1 ppm in air, formaldehyde can irritate the eyes and mucous membranes. Formaldehyde inhaled at this concentration may cause headaches, a burning sensation in the throat, and difficulty breathing, and can trigger or aggravate asthma symptoms.
1 day ago · At the photosphere, the temperature has dropped 350-fold to 5,700 K (9,800 °F) and the density to only 0.2 g/m 3 (about 1/10,000 the density of air at sea level, and 1 millionth that of the inner layer of the convective zone).
5 days ago · Climate - Pressure, Wind, Air: Atmospheric pressure and wind are both significant controlling factors of Earth’s weather and climate. Although these two physical variables may at first glance appear to be quite different, they are in fact closely related.
