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Consider two identical +84 microcoulomb point charges placed 91 cm apart. Let there be a +1 nC (1 nanocoulomb = 1E-9 coulomb) test charge midway between them. Calculate the work (in J) required to move the test charge to a point 6.7 cm closer to either of the charges.
You drive west at 74km/h for 25min , then follow a road that goes 41^\circ south of west, driving at 93km/h for another 36min. Find your average speed for the trip
Proper design of automobile braking systems must account for heat buildup under heavy braking.
If the iron core of a collapsing star initially spins with a rotational frequency of F = 6.3 s^-1 , what is the rotational frequency of the iron core
Two ultrasonic sound waves combine and form a beat frequency that is in the range of human hearing for a healthy young person, What is the largest possible value for the frequency of the other ultrasonic wave
what is the amplitude of the electric field vector of the satellite broadcast as measured at the surface of the earth? Use Eo=8.85*10^-12C/(V*m) for the permittivity of space
Water flowing through a 1.8cm-diameter pipe can fill a 300L bathtub in 6.4 min. What is The speed of the water in m/s
A parallel capacitor has plates 2.0cm x 3.0cm. The plates are separated by a 1.0mm thick piece of paper. Find the capacitance of this device
In Oersted's experiment, suppose that the compass was 0.27 m from the current-carrying wire. If a magnetic field of 1/4 the Earth's magnetic field of 5*10-5 T was required to give a noticeable deflection of the compass needle, what current must the w..
A golf ball is hit horizontally from the edge of a ramp. It lands at an elevation 200 m below and its trajectory upon landing is 45° angle below the horizontal
Two identical diverging lenses are separated by 15 cm. The focal length of each lens is -8.0 cm. Determine the final image distance relative to the lens on the right
A solenoid of length 4.0 cm and diameter 0.93 cm is wound with 165 turns per cm. What is the induced emf in one of the windings
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 29.4m/s2. Find the maximum height ymax reached by the rocket
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