Two parallel plates of area 100 cm2 are given charges of equal magnitudes 0.000000445 C but opposite signs. The eclectic field within the dielectric material filling the space between the plates is 1400000 V/m. Calculate the dialectic constant of the material * 7,2 3.6 O 2.7

solve very very fast in 15 min please

loss 39. Sterling Silver is 92.5% pure silver. How many grams of Sterling Silver must be mixed to 80% Silver alloy to obtain a 500g of a 88% Silver alloy? A. 260 B. 280 C. 300 D. 320 S

1) A phosphor-bronze spring has the following dimensions: Length of strip = 400 mm Thickness of strip = 0.075 mm Width of strip = 0.5 mm The Young's modulus of phosphor-bronze is 12× 109 kg/m2. Estimate the torque exerted by the spring when it is turned through 90°. %3D [Ans. 0.83 x 10–6 kgm]

Calculate the change in the entropies of the system and the surroundings, and the total change in entropy, when the volume of a sample of argon gas of mass 21 g at 298 K and 1.50 bar increases from 1.20 dm3 to 4.60 dm3 in (a) an isothermal reversible expansion, (b) an isothermal irreversible expansion against pex = 0, and (c) an adiabatic reversible expansion.

A poorly designed electronic device has two bolts attached to different parts of the device that almost touch each other in its interior as in the figure. The steel and brass bolts are at different electric potentials, and if they touch, a short circuit will develop, damaging the device. The initial gap between the ends of the bolts is d = 5.0 mm at 27°C. At what temperature will the bolts touch? Assume the distance between the walls of the device is not affected by the temperature change. Steel 0000000 0.010 m 0.030 m Brass 5.0 μm

A 15 cm length of steel rod with relative density of 7.4 is submerged in a two layer fluid. The bottom layer is mercury and the top layer is water. The height of a top surface of the rod above the liquid interface in 'cm' is A. 8.24 B. 7.82 C. 7.64 D. 7.38

The aluminum tube AB of cross section has a fixed support on the base and is supported by a pin at the top of a horizontal beam supporting a load Q = 200 kN. Determine the required thickness t of the tube if its outside diameter for 100 mm and the necessary safety factor in relation to Euler buckling for n = 3.0 (assuming A = 72 GPa).  I know the answer, but I cannot understand the critical charge formula. I don't know why to use the constant 2.046 in the formula, can you please show me?

In Figure below if a metlic c:ube of a 1 2 inch side length weighing 46 kg, floats at a two layer fluids mercury and sea water. Detennine the position of the block at mercury- water interface when it has reached equilibrium. (mass density of sea water ; 63.92623 lb/fts) and for mercurv : 845 lb/ftS).