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In the days of horse-drawn wagons, iron tires used to be placed on wooden wagon wheels by heating the iron rims and slipping them over the wheels before they cooled. If an iron tire is made to fit tightly around a 1.2- m-diameter wheel at 15 oC, what diameter will the tire have when it is heated to 680 oC? ( 0.00)
A long solenoid has 80 turns/cm and carries current i. An electron moves within the solenoid in the circle of radius 3.10 cm perpendicular to the solenoid axis. The speed of an electron is 0.0330c (c = speed of light). Find current i.
A player bounces a 0.47 kg soccer ball off her head, changing the velocity of the ball from i = (9.2 m/s) + (-2.7 m/s) to f = (6.1 m/s) + (5.5 m/s). The ball is in contact with the player's head for 6.70ms.
Use the average value of the buoyant force to calculate an experimental value of the volume of all three objects in kg/m3
Two skaters with masses of 66kg and 51kg , respectively, stand 7.5m apart, each holding one end of a piece of rope. how far does each skater travel
The acceleration of a particle is given by ax(t)=? 1.90m/s2 +( 2.90m/s3 )t, Find the initial velocity v0x such that the particle will have the same x-coordinate at time t= 4.04s
A particular guitar string is supposed to vibrate at 191- Hz, but it is measured to actually vibrate at 210- Hz. By what percent should the tension in string be changed to get the frequency to the correct value.
In a darkened room we place a lighted tungsten bulb in a box that has one end covered with tinfoil. If we make a pinhole in the tinfoil, an image of filament appears on a screen facing the tinfoil.
Two people push a stalled car at its front doors, each applying a 260 N force at 25 degree to the forward direction. How much work does each person do pushing car 5.5 m.
A current of 18 Ampere runs through the Parallel Wire Apparatus. What is the anticipated mass (in milligrams) for balancing the frame-balance
A skier finds that she must give hersel a push to get started down ski slopes with angles less than 8 degrees. What is the coefficient of static friction between the skis and the snow
A 29.0 kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 85.0 N and is directed at the angle of 30.0° above the horizontal. Find out the coefficient of kinetic friction.
A 5.4-µC point charge is located at x = 0.9 m, y = 3.3 m, and a -3.9-µC point charge is located at x = 1.9 m, y = -1.9 m. (a) Find the magnitude and direction of the electric field at x = -3.2 m, y = 0.9 m.' (b) Find the magnitude and direction of..
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