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A spherical oil droplet with nine excess electrons is held stationary in an electric field between two large horizontal plates that are 2.25 centimeter apart. The field is produced by maintaining a potential difference of 0.3375 kV across the plates, and the density of the oil is 824 kg/m3. Determine what is the radius of the oil drop? (e = 1.60 x 10-19 C).
A man is trying to get his car out of mud on the shoulder of a road. He ties one end of a rope tightly around the front bumper and the other end tightly around a utility pole a distance d away. What is the magnitude of the force on the car from the..
If we drop a small metal sphere into the water and watch its motion, it will quickly reach terminal velocity. what is the Reynold's number of this sphere
A microscope with an eyepiece lens of focal length 1.80 cm and an objective lens of focal length 0.95 cm is used to examine a section of the brain of a sacrificed rat. How far from the objective lens is the object
A 1.65 m length of wire is formed into a single-turn, square loop in which there is a current of 12 A. The loop is placed in a magnetic field of 0.04 T. What is the maximum torque that the loop can experience?
A lead block is suspended from the underside of a 0.5 kg block of wood of density of 728 kg/m3. what is the mass of the lead block
In a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 2.0 x 106. One pulse is delivered every time the fully charged capacitor loses 62.1% of its ..
a rock is thrown horizontally with a speed of 20 ms from a vertical cliff of height 27 m.a how long does it take to
The quantity B.ds = UoI in Ampere's law is called magneticcirculation. Active figure 30.10 and Figure 30.13 show pathsaround which the magnetic circulation was evaluated. Each ofthese paths encloses an area. What is the magnetic fluxthrough each area..
A race car travels with a constant tangential speed of 82.4 m/s around a circular track of radius 645 m. Find the magnitude of the total acceleration
A particle of mass 0.450 kg is attached tothe 100 cm mark of a meter stick of mass 0.125 kg. The meter stick rotates on a horizontal,frictionless table with an angular speed of 6.00 rad/s.
A 83.0-?F capacitor is connected to a generator operating at a low frequency. The rms voltage of the generator is 2.60 V and is constant. at what frequency will the fuse burn out
The coefficient of static friction between the stone and each side of the tread channel is 0.7. While the tire surface is rotating at a maximum speed of 1 m/s, the stone flies out of the tread. The magnitude FN of the normal force that each side of t..
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