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a) The dimensions of a parallel-plate capacitor are all increased by a factor of six. By what factor does the capacitance change? (The dimensions refer to the length and width of a plate and the spacing between the plates.)
b) A typical capacitor in an MP3 player has C = 0.10µF. If a charge ±5.3µC is placed on the plates, what is the voltage across the capacitor?
A basketball can be modeled as a thin walled spherical shell with a mass of 0.600 kg and a radius of 12.0 cm. What is the rotational kinetic energy of the ball
Find the magnitude of the magnetic flux through the floor of a house that measures 23m by 18m . Assume that the Earth's magnetic field at the location of the house has a horizontal component of 2.4×10^?5T pointing north, and a downward vertical compo..
A child pulls a friend in a little red wagon with constant speed. If the child pulls with a force of 16 N for 10.0 m, how much work does the child do on the wagon
wave crest pass the bow of anchored boat every 3 seconds. The distance between two crest is 6.6 m. what type of wave is it (longitudinal or transverse) and how fast is it traveling
Niobium metal becomes a superconductor when cooled below 9 K. determine the maximum current a 1.95-mm-diameter niobium wire can carry and remain superconducting
The Hubble Space Telescope (HST) has excellent resolving power because there is no atmospheric distortion of the light. Its 2.4-m-diameter primary mirror can collect light from distant galaxies that formed early in the history of the universe. How fa..
You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball. How tall is the building that the child is standing on
Two charged plates create a potential difference of 190 V. At a point halfway between the plates an electron is released from rest. What was the initial speed and direction of the proton
A certain laser emits red light in a narrow band of wavelengths centered at 533.0 nm, What is the corresponding "frequency width" for the emission
In the Atwood machine shown below, m1 = 2.00 kg and m2 = 5.35 kg. The masses of the pulley and string are negligible by comparison. The pulley turns without friction and the string does not stretch. The lighter object is released with a sharp push th..
A block of mass 0.379 kg is placed on the end of a spring which has a stiffness of 216 N/m. It is pulled down 4.40 cm and released. What is the period of oscillation
A piece of wood with a density of 730 kg/m3 is tied with a string to the bottom of a water-filled flask. What is the volume of the wood
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