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Suppose a van de Graaff generator builds a negative static charge, and a grounded conductor is placed near enough to it so that a 11μC of negative charge arcs to the conductor. Estimate the number of electrons involved.
A ball of mass 0.440 kg moving east (+x direction) with a speed of 3.80 m/s collides head-on with a 0.580 kg ball at rest. what will be the speed and direction of each ball
Assume a dampening depth, d, of 30 cm and a period, lambda, of 24 hours (8.64 x 104 sec). Assume a volumetric heat capacity, C, of 0.5 cal/cm °C, find the thermal diffusivity and conductivity
What is the net upward force on an airplane wing of area 26.0 m2 if the speed of air flow is 246 m/s across the top of the wing and 222 m/s across the bottom
An oscillating LC circuit consists of an ideal 56 mH inductor and an ideal 5600 pF capacitor. find the maximum current in the circuit
A spherical pot of hot coffee contains 0.75 L of liquid (essentially water) at an initial temperature of 95?C. Calculate the coffee's rate of heat loss by radiation
A Force F= (6xi+ 5yj), where F is in newtons and x and y are in meters, acts on an object as the object moves in the x direction, Find the work W = integral (F · d vector r) done by the force on the object
how long does it take to raise the temperature of the air in a good-sized living room by ? note that the specific heat
The motion of a 25.0 kg mass on the end of a string is uniform circular motion. The magnitude of the tangential velocity of the mass is 5.0 m/s, Calculate the angular momentum of the mass
A proton moving at 3.1×105m/s to the right enters a region where a uniform electric field of magnitude 53kN/C points to the left
A yo-yo has a rotational inertia of 910 g·cm2 and a mass of 120 g. Its axle radius is 3.8 mm and its string is 100 cm long. The yo-yo is thrown so that its its initial speed down the string is 1.1 m/s.
A 70 kg person stands on one foot. If his foot is approximately a(n) 8.0-cm by 30-cm rectangle, what is the average pressure beneath his foot
soap bubbles can display impressive colors which are the result of the enhanced reflection of light of particular
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