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An electron is moving at 3 x 105 m/s in the positive x direction. A magnetic field of .8 T is in the positive z direction. The magnetic force is what on the electron? Need magnitude and direction ( i.e. pos/neg z direction, pos/neg y direction)
A uniform stick d = 1 m long with a total mass of 249 g is suspended vertically from a frictionless pivot at its top end. A wad of putty of mass 26 g is moving horizontally with speed v. It strikes and sticks to the stick at a distance 0.75 m from th..
A golfer, putting on a green, requires three strokes to "hole the ball." During the first putt, the ball rolls 4.0 m due east. For the second putt, the ball travels 3.1 m at an angle 20° north of east. The third putt is 0.50 m due north. What disp..
A playground is on the flat roof of a city school, 6.1 m above the street below (see figure). The vertical wall of the building is h = 7.60 m high, forming a 1.5-m-high railing around the playground. A ball has fallen to the street below, and a pa..
An archer shoots a 100 g arrow straight up in the air. The bow was drawn back 50 centimeter by a 150 Newton force. Find how high does the arrow rise assuming friction is negligible
An automatic drier spins wet clothes at an angular speed of 5.2rad/s. How long does it take the drier to come up too speed
A potter's wheel having a radius 0.53 m and a moment of inertia of 11.4 kg, determine the effective coefficient of kinetic friction between the wheel and the wet rag
Suppose the decay constant of radioactive substance A is twice the decay constant of radioactive substance B. what's the half-life of substance A
An archer shoots an arrow horizontally at a target 15m away. What was the initial speed of the arrow
An object is solid throughout. When the object is completelysubmerged in ethyl alcohol, its apparent weight is 15.2 N. What is the object's volume
a meter stick is charged with 20 micro coulombs by placing it on a van de graff generator. assume that the charge is
An electron is constrained to the central axis of a ring of charge 1 coulomb and of radius 1 meter. Find the frequency of oscillation of the electron in Hertz
A 1.00-kg glider attached to a spring with a force constant 25.0 N/m oscillates on a frictionless, horizontal air track. Find the period of the glider's motion
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