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Four protons are placed at the corners of a square of side length a = 1.0 angstrom. The square is in the +x, +y quadrant of the xy plane with one corner at the origin. Find the electric field magnitude and direction
(a) at the center of the square, (b) at the point (-a, -a), and (c) at the point (½a, 0). In each case state which protons contribute to the net electric field you compute and which cancel, and draw a diagram showing the electric field vectors due to each individual proton at the point in question.
A particle with a positive charge 2e moves with a velocity V= (2i + 3j - k) m/s through a region where both a uniform magnetic field and a uniform electric field exist. Calculate the total force on the moving particle
A baseball (mass 0.14 kg, radius 3.7 cm) is spinning with an angular velocity of 55 rad/s. what is the ratio of its rotational and translational kinetic energies
Each of the four circuits in the drawing consists of a single resistor whose resistance is either R or 2R, and a single battery whose voltage is either V or 2V. determine the current delivered to each resistor
The linear coefficient of thermal expansion for concrete is 12x10^-6 ºC^-1. Consider a slab of concrete which is 4.0 m long at 0.0 ºC. What seems to be the primary safety concern in the lab
an electron enters a magnetic field of .75 t with a velocity perpendicular to the direction of the filed. at what
in a laboratory experiment one end of a horizontal string is tied to a support while the other end passes over a
A straight conductor carrying a current of 19 A splits into identical semicircular arcs of radius 13.3 m. The positive direction is out of the screen. What is the magnetic field at the center of the resulting circular configuration?
find magnitude of the tension in the wire and magnitudes.
In a period of 1.0s, 5.0e23 nitrogen molecules stike a wall ofarea 8.0cm2. find the pressure exertedon the wall
a girl and her bicycle have a total mass of 40 kg. at the top of the hill her speed is 5.0 m/s. what is her speed at the bottom
A step-down transformer is used for recharging the batteries of portable devices such as tape players. find the voltage supplied to a tape player from the transformer
A 0.800 m long solenoidis formed by wrapping 680 turns of wire around a hollow cylinderwith a radius of 0.130 m. calculate the energy stored in the field
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