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A 28 Vpp square wave (50% of the time at +28 volts and 50% of the time at 0 volts) is connected to a 4 ohm speaker. Calculate the average power delivered to the speaker.
A parallel plate capacitor has square plates with sides of length 10 cm. The distance between the plates is 4 mm. What is the amount of charge on each plate
What is voltage difference between floor and hover-board
A rope, under a tension of 294 N and fixed at both ends, oscillates in a second-harmonic standing wave pattern, find the length of the rope and the speed of the waves on the rope
A copper ball with a radius of 1.5cm is heated until its diameter has increased by 0.17mm .Assuming an initial temperature of 21?C
A vector force F= 6i + 5j N causes a torque on the end of vector distance R= 3i m. Use the cross product to find the resultant torque
The radius of the hydrogen atom is 0.053 nm. compute the frequency of the circular motion of the electron
A loudspeaker of mass 23m is suspended a distance of h = 1.20 m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 2.9m.
In a diffraction experiment a point (pinhole) source of wavelength 600 nm is to be used. Determine whether Fresnel or Fraunhofer diffraction applies
A 0.420 kg ice puck, moving east with a speed of 3.12 m/s, has a head-on collision with a 0.890 kg puck initially at rest. Assuming a perfectly elastic collision, What is the speed of the heavier puck
A sample of the radioactive nuclide is prepared that has an initial activity of 7.28×1011 .92.4 after the sample is prepared, What is the half-life of this nuclide
In our electrostatics lab, we charge a metal sphere to 1000 V. What is the electric potential due to the charged sphere at a point 1.00 cm from its surface
If you place the box on a dolly of mass 5.3 {rm kg} and with coefficient of rolling friction 1.3×10−2, illustrate what horizontal acceleration would that 171 {rm N} force provide?
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