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An electron with speed 1x106 m/s is shot perpendicular to the field lines of a uniform magnetic field of 0.02 T. The electron will follow a circular path with the magnetic forcing providing the centripetal acceleration. What is the radius of this circle?
A step-up transformer has 26 turns on the primary coil and 770 turns on the secondary coil. what input current and voltage are needed
An object is 24 cm in front of a diverging lens that has a focal length of -17 cm. How far in front of the lens must the object be placed so that the size of its image is reduced by a factor of2.2?
A convex spherical mirror, whose focal length has a magnitude of 20.6 cm, is to form an image 13.0 cm behind the mirror. What is the magnification of the mirror
A 70-kg log falls from a height of 25 m into a lake. If thelog, the lake, and the air are all at 300K, find the change inentropy of the Universe for this process
A phone cord is 5.00 m long. The cord has a mass of 0.200 kg. A transverse wave pulse is produced by plucking one end of the taut cord. The pulse makes four trips down and back along the cord in 0.925 s. What is the tension in the cord?
A blue ball is thrown upward with an initial speed of 24.1 m/s, from a height of 0.8 meters above the ground. 2.9 seconds after the blue ball is thrown, How long after the blue ball is thrown are the two balls
Calculate the diameter of a 1.51 cm long tungsten filament in a lightbulb if its resistance is 0.507 ?
If a supersonic jet traveling at Mach 3 atan altitude of 20 000 m is directly overhead at time=0, Where will the plane be when it is finally heard
The brightest star in the night sky is Sirius, which is at a distance of 8.3x1016 m. When we look at this star, how far back in time are we seeing it? Enter answer in years. Do not enter units.
A student is trying to decide what to wear. His bedroom is at 17.0°C. His skin temperature is 36.0°C, Find the net energy loss from his body by radiation in 10.7 min
A cannon is aimed at an angle of 30 degrees above the horizontal. It fires a cannonball into the direction of a valley with a muzzle velocity of 100m/s. What is the maximum height of the ball
A ball is thrown vertically upward, starting at y = 0, with a velocity of 20.0 m/s. Take "up" to be the positive direction for this problem. Calculate the maximum vertical displacement of the ball
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