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Two capacitors are connected in parallel with a 12 v battery. Each has plates of area 16 cm^2. The plate seperations are d1=2mm and d2=3mm. The first capacitor has a 2 mm slab of plexiglas between the plates. Find the two capacitances, the stored charge, and the stored energy. The capacitors are now disconnected from the battery but remain connected in parallel with each other. The plexiglas slab is moved from the first to the second. What are the two capacitances then? Calculate the charge on each and the total energy stored. How much work is done to move the slab?
The doctors planning a radiation therapy treatment have determined that a 50g tumor needs to receive 0.21J, What is the dose in gray
Legend has it that, many centuries ago, Archimedes jumped out of his bathtub and ran across town naked screaming "Eureka!" after he solved an especially difficult problem.
A 30 kg child is sitting on the outer edge of a 100 kg carousel with a radius of 2.0 m. What is the moment of inertia of the carousel and child
An object placed 2.6 meters in front of a mirror produces an inverted image of one half the size. find Is it convex or concave
A cluster of galaxies has a radius of about 5.2 million light-years (4.9×10^22) and an intracluster medium with a temperature of (6.5×10^7) K. Estimate the mass of the cluster. Give the answer in both kilograms and solar masses. Suppose combined l..
A generator with an rms voltage of 130V is connected in series to a resistor 3.25 kilo-ohm, At what frequency must this circuit be operated for the current to lead the voltage by 24.0 degrees
A 49.0 g ball of copper has a net charge of 1.7 µC. What fraction of the copper's electrons have been removed
In Larry Niven's science-fiction novel Ringworld, a rigid ring of material rotates about a star. The inhabitants of this ring world live on the starlit inner surface of the ring, What is the length of a year on this planet
A flat (unbanked) curve on a highway has a radius of 180{\rm m}. What is the minimum coefficient of friction that will prevent sliding
Calculate the gravitational force between the Sun and the Earth. Use the following numbers. G = 6.67 x 10-11 m3/kg/s2, Mass of the Sun (M_sun) = 2.0 x 1030 kg
A force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete exerts on the ground as a function of time. What impulse did the athlete receive from the platform
A 2.0kg wood block is launched up a wooden ramp that is inclined at a 27? angle. What speed does it have when it slides back down to its starting point
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