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Use energy conservation methods to calculate the maximum speed of a 400 g rock dropped from a 40 m high bridge into water below. Then use kinematics methods to determine the time taken to hit the water (ignore air resistance).
A series circuit contains a 5.00/π-H inductor, a5.00/π-μF capacitor, and a 30.0 ohm resistor connected to a 120 Volt (rms) source of variable frequency. Determine the capacitive reactance [Ω] at the resonance frequency
An energy storage system based on a flywheel (a rotating disk) can store a maximum of 3.0 MJ, What is the moment of inertia of the flywheel
A small postage stamp is placed in front of a concavemirror. radius = .84m. such that the image distanceequals the object distance. what is the magnification of the mirror with proper sign
A horizontal power line carries a current of 4880 A from south to north. Earth's magnetic field (75.1 µT) is directed toward the north and is inclined downward at 52.0° to the horizontal. Discover the magnitude of the magnetic force on 110 m of the l..
a person whose near-point distance is 5 cm wears a pair of glasses that are 2.2 cm from her eyes. with the aid of these
a block is made of an unknown material. when placed in water the block floats and 4 m3 of the block is observed to be
A submarine is 304 m horizontally out from the shore and 126 m beneath the surface of the water. A laser beam is sent from the sub so that it strikes the surface of the water at a point 232 m from the shore. If beam just strikes the top of a building..
An engine absorbs 1699 Joule from a hot reservoir and expels 1199 Joule to a cold reservoir in each cycle. Compute how much work is done in each cycle
A parallel-plate air capacitor of area 15 cm2 and plate separation 2 millimeter is charged by a battery to a voltage 60.0 V. find how much additional charge will flow from battery onto the positive plate
As the shuttle bus comes to a sudden stop to avoid hitting a dog, it accelerates uniformly at -4.1 m/s^2 as it slows from 9.0 m/s to 0.0 m/s. Find the time inte
The nucleus in an iron atom has a radius of about 4.0 X 10-15 m and contains 26 protons, What is the magnitude of the gravitational force between those same two protons
A charged object is brought close to the top of the electroscope and it was noted that the leaves of the electroscope opened further. Identify the charge on the object and explain your reasoning
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