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A uranium atom is ionized seven times, losing seven electrons inthe process. Its resulting mass is 3.90×10−25 kgand it is given a kinetic energy of 3000 eV. If it circles ina magnetic field at a radius of 4.00 m, what is the strength of the magnetic field?
A 310g bird flying along at 6.2m/s sees a 8.0g insect heading straight toward it with a speed of 31m/s, What is the bird's speed immediately after swallowing
a spring is hanging down from the ceiling and an object of mass m is attached to the free end. the object is pulled
A 66-N m torque acts on a wheel with a moment of inertia 175 kg m2. If the wheel starts from rest, explain how long will it take the wheel to make one revolution?
a 1.5 kg ball falls onto a floor. just before it strikes the floor its velocity is 12 m/s. the ball bounces up with a velocity of 10 m/s. find the impulse on the ball
A Dynamics cart with its plunger depressed is placed at a certainheight on a inclined plane at a known angle how can the coefficientof kinetic energy be calculated if the mass, the height, the angleand spring constant are known?
A bicycle is turned upside down while its owner repairs a flat tire on the rear wheel. A friend spins the front wheel, of radius 0.386 m, and observes that drops of water fly off tangentially in an upward direction, find the magnitude of the averag..
A 0.075 kg toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of 1.15 m/s in a horizontal circle of radius 0.35 m
a car originally traveling at 30 m/s manages to brake for 5 seconds while traveling 125 m down hill. find the acceleration of the car after the brakes failed
An object is placed 13.1 cm to the left of a diverging lens of focal length -6.04 cm. Find the distance d that places the final image at infinity
A small sphere with a mass of 441 g is moving upward along the vertical +y-axis when it encounters an electric field of 5.00 N/C. what is the charge that it carries
Calculate the potential energy of a rock with a mass of 55 kg while sitting on a cliff that is 27 m high.
A mass of 12.5 kg is hanging by a steel wire 1.11 m long and 1.03 mm in diameter. If the mass is pulled down slightly and released, what will be the frequency of the resulting oscillations
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