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A) Write an expression for the volume charge density, rho(r) of a point charge q at r'
(the volume integral of rho(r) = q)
b) What is the volume charge density of an electric dipole consisting of a point charge-q at the origin and a point charge +q at a(bar)
c) What is the charge density of a uniform infinitesimally thin spherical shell shell of Radius R and total charge Q which is centered at the origin.
note: the integral over all space must equal Q)
In the idealized model attached shown, m = 15 kg, k = 135 N/m, and the viscous damping ratio is 0.15. Assume that an external harmonic force F(t) = 15 cos 4 t acts on the system with F0=15 N and forcing frequency of 4 rad/s.
a solar-thermal-electric power plant collects energy from sunlight focused on a high-temperature collector where solar
cooling water enters a cooling tower at a rate of 1000 kgh and 70 degree c. water is pumped from the base of the lower
The new customer also wishes to have some involvement in the configuration of the system. Explain why, in these circumstances, it might be a good idea for the company owning the software to make it open source.
Neglect the mass of the wheels and any frictional resistance to motion. The density of sand is rs = 1520 kg>m3.
Determine the magnitude of the resultant force acting on a 5 kg particle at the instant t=2 s. if the particle is moving along a horizontal path defined by the equations r=(2t+10) m and theta = (1.5t^2-6t) rad, where t is in seconds
a wing generates a lift l when moving through sea-level air with a velocity u. how fast must the wing move through the
a gas stream containing acetone vapor in air leaves a polymer drying process. a 3.0 l sample of gas at 25 deg. c 1.0
The pipe emissivity is 0.8, and the temperature of the air and the surroundings is 20°C. What is the heat loss per unit length of pipe?
Three lb of water is contained in a piston–cylinder assembly, initially occupying a volume V1 5 30 ft3 at T1 5 300°F. The water undergoes two processes in series: Constant-temperature compression to V2 5 11.19 ft3, during which there is an energy tra..
A constant pressure is applied to a 0.5 m diameter vertical cylinder of 300 kPa in a piston cylinder device. Atmospheric pressure is 100 kPa. Calculate the mass of the piston and the work needed to move the piston 5 m in the upward direction.
Neglect fringing at the air gaps and any leakage fields. N = 1,000 turns, i = 0.2 A, lg1 = 0.02 cm, and lg2 = 0.04 cm. Assume the reluctance of the magnetic core to be negligible.
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