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Two charged particles of equal magnitude (-Q and -Q) are fixed at opposite corners of a square that lies in a plane. A test charge -q is placed at a third corner. What is the direction of the force on the test charge due to the two other charges?
An ?-particle has a charge of +2e and a mass of 6.64 ? 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.06 X 106 V, What is the speed of the ?-particle
Albert pushes a 6-kg box across a level floor. He pushes with a force of 43 newtons, and observes that the box accelerates in the direction of his push, What must be the net force acting on the box
A potter's wheel having a radius 0.450m and a moment of inertia 15 kg•m2 is rotating freely at 45 rev/min. The potter can stop the wheel in 7.50 s by pressing a wet rag against the rim and exerting a radically inward force of 68 N.
A 1.08 kg mass is at the center of a uniform spherical shell of mass 1.05 1020 kg and radius 1.11 106 m. Find the resultant gravitational force on the mass
A playground is on the flat roof of a city school, 5 m above the street below (see figure). The vertical wall of the building is h = 6.20m high, to form a 1.20 m high railing around the playground.
A particular organic molecule forms an electric dipole by possessing an effective charge separation of 0.177 nm for a pair of ±1.60 × 10-19-C charges. (a) What is the magnitude of the molecule's electric dipole moment?
Suppose that charges on a dipole antenna oscillate slowly at a rate of 1 cycle/s, and the antenna radiates electromagnetic waves in a region of space. What is the magnitude of the Poynting vector
A 1.80 kg block slides on a frictionless horizontal surface. The block hits a spring with a speed of 2.00 m/s and compresses it a distance of 11.0 cm before coming to rest. Illustrate what is the force constant of the spring?
A therapist examines the range of motion of an thlete's knee joint during her rehabilitation from a knee injury, What was the angular displacement of the leg from full extension to full flexion
Consider a pair of charged parallel plates, each having an area of 5cm^2. what is the magnitude of the electric field in the space
A 0.54 kg mass at the end of a spring vibrates 10 times per second with an amplitude of 0.19 m. Determine the velocity when it passes the equilibrium point
a 4.6kg sphere made of metal whose density is 3800kg/m^3, is suspended by a cord. What fraction of the volume of the sphere is submerged
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