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A 90.0 kilogram box of book slides from rest down a frictionless incline from a height of 5.0 m. A constant frictional force, introduced at point A, then brings the box to rest at point B which is located 19.0 m to the right of point A. (a) what is the speed of the box just before it reaches point A. (b) What is the coefficient of kinetic friction, of the surface from A toB?
Two charged bodies exert a force of 0.245N on each other. If they are moved so that they are one-fifth as far apart, what force is exerted?
You inflate the front tires on your car to 29 psi. Later, you measure your blood pressure, obtaining a reading of 138/84, the readings being in mm Hg. In metric countries (which is to say, most of the world), these pressures are customarily reported ..
a spherical capacitor has an inner sphere of radius 12 cm and an outer sphere of radius 13 cm. the outer sphere is
An 83.6-mH inductor and a 6.22-µF capacitor are connected in series with agenerator whose frequency is 355 Hz. Therms voltage across the capacitor is 2.36V. Determine the rms voltage across the inductor.
at a particular instant a rock is flying with velocity 5i-4j4k ms relative to the ground. here i j and k are unit
a positron emission tomography scanner examines the gamma rays emitted when positrons and electrons annihilate each other. What is the wavelenth of the photons
An unmarked police car travelling a constant 85 km/h is passed by a speeder. Precisely 2 s after the speeder passes, police officer steps on the accelerator.
A person 1.6 m tall stands 4.9 m from a reflecting globe in a garden. How large is the person's image
A 2-kg box is initially sliding at a speed of 15 m/s on a horizontal surface. What is the coefficient of kinetic friction between the box and the horizontal surface
a step-down transformer produces a voltage of 6.9v across the secondary coil when the voltage across the primary coil
Two small plastic spheres, one charged to 17nC and the other to -17nC are connected by a 25 mm long insulating rod, What is the maximum possible torque on the dipole
The charge experiences a magnetic force of 7.41 10-3 N. A second charge q2 = 4.00 µC travels at an angle of 40.0° with respect to the same magnetic field and experiences a 1.80 10-3-N force. Identify the magnitude of the magnetic field and the ..
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