Adisc magnet is used to hold a piece of paper (0.1 mm thick) to the door of a refrigerator. the magnet is 6 cm in diameter and 0.75 cm thick. its mass is 500 grams. assuming that the coefficient of friction between the paper and the refrigerator is 0.3, what is the minimum remanent magnetism (in gauss) that the magnet must have in order to keep the magnet and paper from falling?

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg. k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m. k

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false