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A loudspeaker of mass 20.0 kg is suspended a distance of h = 2.20m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 2.90m. What is the tension T in each of the cables?
suppose that a 1.00 cm3nbspbox in the shape of a cube is perfectly evacuated except for a single particle of
A hollow spherical shell with mass 1.80kg rolls without slipping down a slope that makes an angle of 40.0? with the horizontal. Find the magnitude of the frictional force acting on the spherical shell
an explorer is caught in a whiteout in which the snowfall is so thick that the ground cannot be distinguished from the
Two 1.5 g spheres are charged equally and placed 1.6 cm apart. What is the magnitude of the charge on each sphere
A positive charge of 4.80 C is fixed in place. From a distance of 3.60 cm a from the fixed positive charge, a particle of mass 5.70 g and charge +3.70 C is released from rest.
A proton is initially at rest at a point where the potential is 515V. Sometime later the proton is at a point where the potential is 190V. If no force other than the electrostatic force acts on the proton, what is its final kinetic energy.
The distance between atoms in a solid is typically around 2.0 x 10-10 m What is the wavelength of an electron with a kinetic energy of 110 eV
A source of electromagnetic waves radiates power uniformly in all directions at a single frequency. At a distance of 4.00 km from the source, What is the average power radiated by the source
A 15.0 k resistor and a capacitor areconnected in series, and then a 12.0 Vpotential difference is suddenly appliedacross them. Calculate the time constant of the circuit
A stainless steel orthodontic wire is applied to a tooth, as shown in the figure above. The wire has an unstretched length of 2.7 cm and a diameter of 0.2 mm. What is the tension in the wire
A humanitarian aid package is dropped from a plane flying horizontally 500m above the ground with a speed 100m/s. What is the speed of the package at time of impact? (Calculate the total speed, not a horizontal or vertical projection.)
The area of a typical eardrum is about 5.0x10?5 m2. What is the sound power (energy per second) incident on the eardrum at the threshold of hearing
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