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The drawing shows an equilateral triangle, each side of whichhas a length of 4.74 cm. Point charges are fixed to each corner, asshown. The 4.00 C charge experiences a net force due to the chargesqA and qB. This net forcepoints vertically downward and has a magnitude of 719 N. Determine the magnitude and algebraic sign of the two charges.
A particular guitar string is supposed to vibrate at 214 Hz, but it is measured to actually vibrate at 272 Hz. By what percentage must the tension in string be changed to get the frequency to the accurate value.
An 86 Kg person stands on a uniform ladder 4m long, that weighs 70N. The floor is rough; hence, it exerts both a normal force, and a frictional force, on ladder. The wall, on the other hand, is frictionless; it exerts only the normal force. What a..
water in a rotating container of radius 50 mm is 30 mm lower in the center than it is on the edge. Find the angular velocity of the container
An elevator ascends 200m with maximnum speed of 5.0 m/s. how far deos the elevation move while accelerating to full speed from rest
A solid disk of radius 6.30cm and mass 1.15kg , which is rolling at a speed of 1.50m/s , How long will it take for the disk to come to a stop
For some applications, it is important that the value of a resistance not change with temperature. For example, suppose you made a 4.60 kresistor from a carbon resistor and a Nichrome wire-wound resistor connected together so the total resistance is ..
A thin film with index of refraction n = 1.29 is placed in one arm of a Michelson interferometer, perpendicular to the optical path. If this causes a shift of 8.0 bright fringes of the pattern produced by light of wavelength 693nm, what is the film t..
Two particles with masses m and 3m are moving toward each other along the x axis with the same initial speeds Vi. What is the angle theta at which the particle 3m is scattered
A ball of mass 522 g starts at rest and slides down a frictionless track. It leaves the track horizontally, striking the ground a distance x = 0.91 m from the end of the track after falling a vertical distance h2 (bottom of ramp)= 1.03 m from the ..
After 2.02 days, the activity of a sample of an unknown type radioactive material has decreased to 88.2% of the initial activity. What is the half-life of this material
the block diagram of the control of an electric heating system. the heater is driven from a voltage-controlled power
A ceiling fan consists of a small cylindrical disk with 5 thin rods coming from the center. The disk has mass md = 3.3 kg and radius R = 0.22 m. The rods each have mass mr = 1.2 kg and length L = 0.76 m.3) What is the moment of inertia of the whole c..
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