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During a cold winter day, wind at 55 km/h (assuming heat transfer coefficient h = 32.8 W/m2C) is blowing parallel to a 4-m-high and 10-m-long wall of a house. If the air outside is at 5 C and the surface temperature of the wall is 12 C, determine the rate of heat loss from that wall by convection. What would your answer be if the wind velocity has doubled (assuming heat transfer coefficient h = 58.6 W/m2.C)?
A lightbulb is wired in series with a 184Ω resistor, and they are connected across a 120 V source. What is the resistance of the light bulb
q1. a baseball thrown at an angle of 55.0circ above the horizontal that strikes a building 18.0 rm m away at a point
Air "breaks down" when the electric field strength reaches 3*10^6 N/C, causing a spark. How many electrons must be transferred from one disk to the other to create a spark between the disks
A space station in the forf of a large wheel, 129m in diameter, rotates to provide an "artificial gravity" of 6.10 m/s^2 for people located at the outer rim.
A widely used "short-wave" radio broadcast band is referred to as the 25-m band. What is the frequency of a 25-m radio signal
q1. a diatomic gas molecule has a mass of 2.01 x 10-26 kg and a rotational inertia of 3.37 x 10-46 kgbullm2 about an
A large air conditioner has a resistance of 7.0?and an inductive reactance of 17?. Find the impedance of the air conditioner
A truck weighs four times as much as a car. if the truck coasts into the car at 12km/h and they stick together, what is their fimal velocity.
A car traveling at a constant speed of 22.5 m/s passes a trooper hidden behind a billboard. One second after the speeding car passes the billboard, the trooper sets off in chase with a constant acceleration of 3.90 m/s2.
It is desired that 5.5 microcoulomb of charge be stored on each plate of a 2.5 microF - capacitor. What potential difference is required between the plates
A girl who is learning karate is going to break four bricks with her hand. Her hand and arm mass is 1.56 kg. what is the force delivered to the bricks
question1consider an array of parallel wires with uniform spacing of 1.30 cm between centers. in air at 20.0degc
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