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The cooper windings of a motor Have a resistance of 55 ohms at 20 degrees C when the motor is idle. After running for several hours the resistance rises to 67 ohms What is the temperature in degrees Of the windings?
A capacitor is used as energy storge device. the material between the plates of the capacitor has a certain resistance leading to a gradual slef-discharge. What is the fraction of the initial energy lost in the first hour
A dog running in an open field has components of velocity v_x = 3.2 m/s and v_y = -2.1 m/s at time t_1 = 11.6 s. For a time interval from t_1 = 11.6 s to t_2 = 19.7 s, the average acceleration of the dog has magnitude 0.30 m/s^2 and direction 35.0..
A 0.350 m rod with uniform mass distribution runs along the x axis with its left end at the origin. A 1.80 m rod with uniform mass distribution runs along y axis with its top end at the origin. Find out the coordinates of the center of gravity for..
A solid uniform brick is placed on a sheet of wood. When one end of the sheet is raised , What is the width w of the brick
Assuming that the depth of Earth's atmosphere is 100.0 km, what is the total charge incident on the atmosphere in 177.0 s? Assume that the radius of the surface of the Earth is 6378. km.
The height of a helicopter above the ground is given by h = 3.15t3, How long after its release does the mailbag reach the ground
Starting from rest, a 12-cm-diameter compact disk takes 2.5s to reach its operating angular velocity of 1500rpm. How much torque is applied to the disk
A wooden dowel (cylinder) has a diameter of 2.20 cm. Determine the density of the dowel
A very long, hollow cylinder (radius 4.7cm) is formed by rolling up a thin sheet of copper, Use Ampère's law to find the magnetic field outside the cylinder at a distance 6.8cm from the axis
Two uniform infinite sheets of electric charge densities 48.0 C/m2, Find the magnitude of the electric field everywhere
A ball rolls off a table with a horizontal velocity of 5 m/s If it takes 0.6 secs for it to reach the floor A. What is the verticle componet of the balls velocity just before it hits the floor? (use g= 10 m/s^2) B. What is the horizontal componet ..
q1. a train at rest emits a sound at a frequency of 1045 hz. an observer in a car travels away from the sound source at
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