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Two charges are located on the x axis: q1 = +4.6C at x1 = +5.5 cm, and q2 = +6.0C at x2 = -3.1 cm. Two other charges are located on the y axis: q3 = +4.8C at y3 = +7.6 cm, and q4 = -5.8C at y4 = +4.1 cm. Find (a) the magnitude and (b) the direction of the net electric field at the origin. Specify the direction as an angle with respect to the +x direction.
People who suffer from cataracts may have the lenses in their eyes replaced by artificial lenses. what is the refractive power of the glasses she will need to see the object clearly
The gravitational acceleration on the Moon is a sixth of that on Earth. The weight of an apple is 1.03 N on Earth. (a) What is the weight of the apple on the Moon? (b) What is the mass of the apple?
Determine the first three normal-mode frequencies for a pipe of length L that is closed at both ends. Use the results of part A to estimate the normal-mode frequencies of a shower stall. (Assume that a shower has a length of 1.42{\rm m} ).
The sound intensity 44 m from a wailing tornado siren is 0.10 W/m2 -. Estimate the maximum distance at which the siren can be heard
A friend speeds by you in her spacecraft at a speed of 0.770 c. It is measured in your frame to be 4.70m long and 1.45m high. What will be its length at rest
A cannonball is shot from a cannon on a cliff at a height of 12.4 m at a ship on the ocean. What is the total range of the cannonball
A simple pendulum has a length of 0.70 m and a mass of 0.75 kg. Calculate the quantum number for the pendulum
A new type of personal scale is designed where the person stands on top of a platform supported by a rubber cylinder which has a radius of 5 cm and a height of 10 cm. What is the mass of the person
A spacecraft has a nonrelativistic (or classical) momentum whose magnitude is 1.4×1014 kg·m/s. Find the relativistic momentum of the spacecraft
A skier of mass 73 kg is pulled up a slope by a motor-driven cable, What power (expressed in hp) must a motor have to perform this task
q1. a spring with a spring constant of 2.0 times 102 nm is attached to a 1.7 kg mass and then set in motion. what is
A rectangular loop with dimensions 4.20 cm by 9.50 cm carries current I . The current in the loop produces a magnetic field at the center of the loop that has magnitude 3.40×10?5 T and direction away from you as you view the plane of the loop.
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