Switch S is closed in position a at time t = 0 for along of time in the below circuit, to being charging an initially uncharged capacitor of capacitance C = 5F through a resistor of resistance R = 2035Ω and 7 V battery. After that the switch is closed in position b, the charge that the capacitor lost at the end of two time constants?

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

What are the factors that affect the resistance of a wire?

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.