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Two charges are placed on the x axis. One of the charges (q1 = +5.44C) is at x1 = +3.00 cm and the other (q2 = -27.7C) is at x2 = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) x = +6.00 cm.
A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 9.47 104 Hz, and if the speed of sound in air is 343 m/s, what is the smallest i..
Air is streaming horizontally past a small airplanes wings such that the speed is 50m/s over the top surface and 30 m/s past the bottom surface. the plane has a mass of 300 kg and a total wing area of 5 m^2(both wings).
When a potential difference of 144V is applied to the plates of a parallel-plate capacitor, the plates carry a surface charge density of42.0nC/cm2. What is the spacing between the plates?
The electron beam in a cathode-ray tube is accelerated through apotential difference of 290 V. What is the diameter of the hole
A small moon of a giant planet has an orbital period of 1.41 days and an orbital radius of 4.10 x 105 kilometer. From these data, compute the mass of the planet
A closely wound rectangular coil of 90.0 turns has dimensions of 25.0cm by 41.0cm. What is the average emf induced in the coil
The answer to a problem is the difference between two calculated numbers: 1.13730669 and 1.13729483. What is the percent accuracy that the calculated
A constant 3.70 Amp current moves along a straight wire that is perpendicular to a 2.20 T magnetic field. find how much magnetic force will it experience
A 0.480 kg block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 24.0 N/m. How far does the putty-block system compress the spring
An object, at the top of a very tall building, is released from rest and falls freely due to gravity. Neglect air resistance and calculate the distance covered by the object between times t1 = 5.57 s and t2 = 7.59 s after it is released.
A 0.39 cm high object is placed 8.7 cm in front of a diverging lens whose focal length is -7.5 cm. What is the height of the image
A puck is sliding on flat ground with an initial speed to 7 m/s and comes to rest after 1.25 s. Approximately which is the coefficient of kinetic friction between the puck and the ground?
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