Physics Answers

How long will it take 1.5 Ampere of current to liberate a layer of Coulomb 0.1mm thickness on both sides 12 by 12cm of the electrode, if the electrochemical equivalent is 0.003cm by 9.0 density.

The maximum safe current that can pass through a resistor of 2 kΩ rated at 0.25 Watts is

The diode is considered shorted when both anode and cathode has?

Explain what happen to a power supply if there is no smoothing capacitor connected across the output?

Draw the displacement and distance time graph for a person walking 20 meter from the station towards north for 4 seconds and then stops for another 4 seconds. He turn and walk 8 meter for 3 seconds finally walks for 4 second I this direction and come to stop in 2 second

Compare the image formed by a concave and convex mirror.

A polytropic process of air from 1034 kPa, 149 deg. C and 0.028 m3 occurs to 138 kPa in accordance with pV1.3 = C. Determine:

(a) the final temperature in deg. C

(b) the change in internal energy in kJ

(c) the work nonflow in kJ

(d) the heat in kJ from the formula using polytropic specific heat

0.5 kg of an ideal gas undergoes an isentropic process from 657 kPa gage and a volume of 0.017 cubic meter to a final volume of 0.1 cubic meter. If Cv = 0.384 kJ/kg-K and Cp = 0.52 kJ/kg-K, calculate:

a) the final temperature in deg. C

b) the final pressure in kPa

c) the change in enthalpy in kJ

d) the work nonflow in kJ

While the temperature remains constant at 38 deg. C, 2.5 kg of a certain ideal gas whose Cp = 1.1724 kJ/kg-K, Cv = 0.8375 kJ/kg-K rejects 300kJ of heat. If p1 = 586kPa, determine:

(a) the final pressure in kPa

(b) the initial volume in cubic meter

(c) the final volume in cubic meter

A perfect gas has a value of R = 316 J/kg-K and k = 1.26. If 21 kJ of heat are added to 2.5 kg of this gas during an isometric process when the initial temperature is 32 deg. C, determine:

(a) the final temperature in deg. C

(b) the change in enthalpy in kJ

(c) the change in entropy in kJ/K