2011年8月12日 · The total mass is the only relevant parameter for a spherically symmetric density. For density that is not spherically symmetric the field cannot simply be modeled by the total mass. IMO, the density is primary, and it is only in the special case of spherical symmetry that the density can be neglected in favor of the total mass.

2014年5月16日 · Density is a comparison of the mass of an object and the volume of that object. D = (mass)/(volume) or D = m/V This equation can be rearranged algebraically to solve foray of the values. D = m/V or DV = m or V =m/D Let us look at two sample problems. A rectangular prism has a mass of 42.0 grams and has dimensions of 2 cm in width, 6 cm long and 0.5 cm in …

2014年2月13日 · Linear mass density is the amount of mass per unit length. Just as ordinary density is mass per unit volume, linear density is mass per unit length. Linear densities are usually used for long thin objects such as strings for musical instruments. EXAMPLE Suppose we have a 0.80 mm diameter guitar string made of carbon steel (density = 7.860 g/cm³).

2013年12月19日 · The density is determined by utilizing a variation of the ideal gas law where density and molar mass replace moles and volume. The original ideal gas law uses the formula PV = nRT, the density version of the ideal gas law is PM = dRT, where P is pressure measured in atmospheres (atm), T is temperature measured in kelvin (K), R is the ideal gas law constant …

2010年2月14日 · Determine the density of the sphere in kilograms per cubic meter and the uncertainty in the density. Homework Equations Use the following formula to calculate the uncertainty in the density: Δρ/ρ = Δm/m + 3Δr/r.) The Attempt at a Solution I already found the density: 1583.62 kg/m3 I just want to know how to get the uncertainty.

2016年6月26日 · These days, you should be able to search for the density of any common object. When you have the density and volume but not the mass, then just make up a mass. You shouldn't need specific numbers to do a problem. You can always solve a problem in general and get a solution formula. If you need to, just make up some numbers that you know how to use.

2006年10月28日 · The [110] plane is the plane which cuts the unit cell diagonally in half and it looks like a square. There are just 4*1/4 atoms on the corners of the square - a net total of 1 atom inside the square. The length of one of the sides of the plane is a*sqrt(2). Hence the surface density is 1/(a*sqrt(2)) atoms per unit area.

2024年5月27日 · To determine the density of uranium hexafluoride at 68°C and 743 Torr, you need to use the ideal gas law equation in combination with the density formula. First, calculate the pressure at 68°C ...

2014年12月2日 · Density is the mass per unit of volume of a substance. The density equation is: "Density" = "Mass"/"Volume" To solve the equation for Mass, rearrange the equation by multiplying both sides times Volume in order to isolate Mass, then plug in your known values (Density and Volume). Then solve for Mass. "Mass" = "Density x Volume" Example The …

2024年5月29日 · The formula to calculate the density of water for a change in temperature is: Density = Density at reference temperature / [1 - β (T - T_ref)], where β is the volumetric thermal expansion ...