Find mass concentration of a mono-dispersed aerosol
Calculate the mass concentration, in (micro)g/m3, of a mono-dispersed aerosol with dp = 10.0 micron, (rho)p = 2.1 g cm^-3, and N = 9.55 cm^-3. Assume that the particles are spherical. Ans. 10,500 (micro)g/m^3.
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Two wheels of mass m and moment of inertia I are connected by a massless axle of length L. The system rests on a frictionless surface and the wheels rotate without frequency ω around the axle.
A proton of mass mp = 1.67 x 10-27 kg and charge +e = 1.60 x 10-19 C is accelerated from rest through an electric potential of 270 kV. What is its final velocity?
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The electric potential at the center of a square is -3 V when a charge of -Q is located at one of the square's corners. What is the electric potential at the square's center when identical charges of +Q are placed at the other three corners of the s
Calculate the mass concentration, in (micro)g/m3, of a mono-dispersed aerosol with dp = 10.0 micron, (rho)p = 2.1 g cm^-3, and N = 9.55 cm^-3.
On a smoggy day in a certain city the ozone concentration was0.50 ppm by volume. Calculate the partial pressure of ozone and the number of ozone molecules per liter ofair if the temperature and pressure were 20.0°C and738 mmHg, respectively.
Two identical point charges of q = +1.25 x 10-8 C are separated by a distance of 0.90 m. What is the minimum amount of work required by an external force to move them closer together so that they are only 0.65 m apart?
Estimate the average electrical drift velocity in cm/s for a flat plate ESP with a total collector area equal to 10,000 m^2, and a flow rate of 500,000 m^3/h.
A proposed automobile battery involves the reaction of Zn(s) andCl2(g) to give ZnCl2. If you want such a battery to operate for 12hours and deliver 1.5 A of current, what is the minimum mass of Zinc that the anode must contain?
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