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A charged oil drop that has a mass of 5.40 x 10^-12 kg and carries 10 elementary charges is centered 50 mm below the center of an oppositely charged sphere that has a radius of 5.0 mm. Treat the drop as a particle. Part A What charge must the sphere be given therefore that the electric force it exerts on te drop causes the drop to float in the air for an instant? Express your answer to two important digits and include the appropriate units. q = Value Units
A solid spherical ball of mass 2.3 kg and radius 0.11 m rolls along a smooth, What is the ball's rotational kinetic energy
two charged particles, Q1=+4.60 nC and Q2=-2.50 nC, are separated by 32.0 cm. What is the eletrical potential energy of the pair
A small conducting spherical shell with inner radius a and outer radius b is concentric with a larger conducting spherical shell with inner radius c and outer radius d. The inner shell has the total charge of -1q and outer shell has a total charge..
An inflated football has a gauge pressure of 9.3 Ib/in2. Calculate the pressure inside the football
A string is attached to an overhead beam. If you put a mass of 170 gram on it, and it proceeds to stretch a distance of 7 centimeter, Find what is the magnitude of the downward acceleration
A transformer has 350 primary turns and 1390 secondary turns. The input voltage is 120?V and the output current is 18.0A, find the output voltage and input current
A stretched string fixed at each end has a mass of 40g and alength of 8.00m. The tension in the string is 49.N, What is the vibration frequency for this harmonic
In a test run,a certain car accelerates uniformly from zero to 20.2m/s in 2.95s. How long does it take the car to change its speed from 10.01m/s to 20.02m/s
You sing into a well and find that the well resonates at frequencies of 187 Hz and 221 Hz with no resonances between these two frequencies. What is the frequency of the fundamental mode
At a certain distance from the center of the Earth, a 5.0-{\rm kg} object has a weight of 3.5N. By what factor does its initial acceleration change
a deuteron particle the nucleus of an isotope of hydrogen consisting of one proton and one neutron and having a mass of
Copper wire 0.4 mm in diameter is tightly wounded into a long solenoid and a 3.6A current passes through it. What is the magnetic field in the solenoid
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