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The exterior walls of a house have a total area of 196 m2 and are at 11.9°C and the surrounding air is at 6.7° C. Discover the rate of convective cooling of the walls, assuming a convection coefficient of 3.2 W/(m2 · C°).
An electric fan spinning with an angular speed of 16 rad/s has a kinetic energy of 3.9 J. What is the moment of inertia of the fan
A juggler throws a ball with an initial horizontal velocityof +1.1 m/s and an initial vertical velocity of +5.7 m/s. What is its acceleration at the top of its flight path
A proton initially at rest is accelerated by a uniform electric field. Find the voltage drop through which the proton moves
in molecules of gaseous sodium chloride the chloride ion has one more electron than proton and the sodium ion has one
A solid uniform sphere of mass M and radius R has atranslationavelocity of 10m/s while rolling w/o slipping. estimate to whatmaximum height will it attain
A photographer in a helicopter ascending vertically at a constant rate of 12.5 m/s accidentally drops a camera out the window, How long will it take the camera to reach the ground
A 130g ball moving at 0.35 m/s in the positive x-direction is subject to a 0.15 N force in the negative y-direction for 2.5 seconds. Find the magnitude of the ball's momentum change. Find the ball's final speed.
An RLC circuit with R = 28.7 ohms, = 348 mH, and = 41.4 microfarads is connected to an ac generator with an rms voltage of 27 V. Determine the average power delivered to this circuit when the frequency of the generator is half the resonance frequency
The length of a beam increases by 1.46mm when its temperature is raised from 44.92oC to 90.5 oC. What is the length of the beam at the initial temperature? The thermal expansion coefficient of the material is 0.000053 /oC.
Three point charges are arranged along the x axis. Charge q1= = -4.50nC is located at x=.25m and charge q2=3.00nC is at x=-0.330m. a positive charge q3 is located at origin. What must the value of q3 be for the net force on this point charge to hav..
An object with a mass of 2 kg is moving along a horizontal surface with velocity components vx=4 m/s and vy= ?3.5 m/s. What is the objects speed
An ideal gas is at a temperature of 30 degrees C, find the number of particles per unit volume of the gas
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