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A hill is covered with snow, and has a slope of 30 degree above the horizontal. The slope is l = 40.m long. At the top of a hill, you build a cylindrical snowball, w = 10.0cm long and with a radius of ri = 2.0cm. The mass of the snowball is m = 0.11kg. The snowball is set rolling down the hill. By the time it reaches the bottom of the hill the snowball has a radius of rf = 5.0cm (but still is 10.0cm long). Assume that the snowball is still the same density throughout, and assume that the snow went on smoothly - the same thickness layer of snow from the hill stuck to the snowball at all times. How fast is the snowball rolling at the end? (Hint: use conservation of energy.)
When the magnetic flux through a single loop of wire increases by 30 Tm^2, an average current of 40 A is induced in the wire. over what period of time did the flux increase
Suppose that you wish to mold a uniform wire from 1.50 g of copper. The wire needs to have a resistance of 0.0400 ohm's, What should be the diameter fo the wire?
The acceleration due to gravity on the surface of the moon is about g/ 6. If a pendulum has a period T on earth what will its period be on the moon?
A charge of +q is located at the origin, while an identical charge is located on the x axis at x = 0.51 m. Where should the third charge be located
A coil of 15 turns and radius 10.0 cm surrounds a long solenoid of radius 2.00 cm and 1000 turns/meter. The current in the solenoid changes as I = (5.00 A) sin(120t). Find the induced emf in the 15-turn coil as a function of time.
What is the average speed of a rider on this Ferris wheel.
q1. a man pulls a crate of mass 75.0 kg across a level floor. he pulls with a force of 180.0 n at an angle of 26.0deg
A human can be electrocuted if a current of 0.053 A passes near the heart. If a human is considered to be a resistor in a circuit with a resistance of 2039 ?,
questionnbspnbspa particle has initial velocity 5 ms due east and acceleration 2 ms2 due west. find the distance
How far above the aim is the point
A child leaves her book bag on a slide. The bag, which is at the top of the slide, starts from rest and reaches the bottom in 1.40 s. What is the friction force acting on the bag
A parallel plate capacitor is connected to a battery. The space between the plates is filled with air. Find the electric field inside the dielectric
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