Black box contains unknown resistances and sources
A certain black box contains unknown resistances and sources of emfs connected in an unknown way such that (1) a 10 n resistor accrpss the terminals draws 1.0A and (2) and 18n resistor draws .60A. WHat resistance will draw 0.10A?
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A well-insulated rigid vessel contains 3kg of saturated liquid water at 40o C. The vessel also contains an electrical resistor that draws 10 amperes when 50 volts are applied. Determine the final temperature in the vessel after the resistor h
What is the current throught the ammeter? What is the direction of current through the inner solenoid compared to the outer? Is it in the same or the opposite direction?
The air is now compressed to 0.1 m3in such a way that the temperature inside the cylinder remains constant. Determine the work done during this process.
Air at 1 atm and 30 °C flows over a 15 cm square plate at a velocity of 10 m/s. Calculate the maximum boundary layer thickness.
Helium at atmospheric pressure and 30 °C flows across a square plate at a free stream velocity of 15 m/s. Calculate the boundary layer thickness at a position where Re = 250,000.
When you move up from the surface of the earth the gravitation is reduced as g = 9.807 - 3.32 × 10-6 z, with z as the elevation in meters. How many percent is the weight of an airplane reduced when it cruises at 11 000 m?
Fixed to the origin is a charge q = -0.320 nC. Is there a location, including the effects of gravi- ty, where a proton can be in equilibrium? Explain. If so, what is that location and is it a stable equilibrium position?
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