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A dipole (two equal and opposite charges) are placed 1 nm apart. +e is placed at the origin and -e is placed 1 nm from it to the right of the origin. What is the electric force on the -e charge due to the +e charge?
Two people stand 3 m away from a large plane mirror and spaced 3.8 m apart in a dark room. At what angle of incidence should one of them shine a flashlight on mirror so that the reflected beam directly strikes the other person.
An L-R-C series circuit with an inductance of 0.123 H , a resistance of 240 omega , and a capacitance of 7.29 micro F carries an rms current of 0.445. What is the rms voltage of the source
A proton (mass 1.67 × 10 ?27kg) is moving at 1.15 ×10 ?6m/s directly toward a stationary helium nucleus (mass 6.64 × 10 ?27kg). After a head-on elastic collision, what is the helium's velocity
A particle of mass 4.47 × 10?27 kg, moving at 9.46 × 105 m/s, strikes an identical particle which is initially at rest. What are the final speeds of the particles
Brain injuries in auto accidents. Brain injuries generally occur any time the brain's acceleration reaches 100 g for even a short time. Find the maximum speed with which the car can strike the barrier without causing brain injury, using an airbag
A 815-kg car stopped at an intersection is rear-ended by a 1740-kg truck moving with a speed of 13.0 m/s. find the final speed of both vehicles after the collision
a base for a building column measures 18.0 in. by 18.0 in. on a side and 12 in. high. compute the cross-sectional area in both square inches and square millimeters. compute the volume in cubic inches, cubic feet, cubic millimemters, and cubic mete..
Two identical guitar strings are prepared such that they have the same length (1.91 m) and are under the same amount of tension. What is the wave propagation speed on the guitar strings
A 1200 kg car pulls a 480 kg trailer. The car exerts a horizontal force of 3540 N against the ground in order to accelerate. What force does the car exert on the trailer
A 85.1 kg astronaut is working on the engines of a spaceship that is drifting through space with a constant velocity. How long does it take the astronaut to reach the ship
two cars are racing. car one accelerates at 4.88ms2 and car two at 3.66ms2. if car two gets a 1 second head start when
q. a certain toaster has a heating element made of nichrome resistance wire. when the toaster is first connected to a
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