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A person scuffing her fee on a dry day accumulates a net charge of -42 uC. How many excess electrons does she get, and by how much does her mass increase?
An 81.7-g arrow is fired from a bow whose string exerts an average force of 121 N on the arrow over a distance of 78.4 cm
Unless otherwise stated, all objects are located near the Earth's surface, where = 9.8. Calculate the upward force on the puck in both situations
A marksman fires a bullet (mB= 5.00g) horizontally with a velocity of 300.m/s from a rifle (mR= 3.00kg). What is the recoil velocity of the rifle
A man strikes one end of a thin rod with a hammer. The speed of sound in the rod is 15 times the speed of sound in air. what is the length of the rod
Light of wavelength 500 nm illuminates a round 0.50-mm-diameter hole. find the width of the central bright circle on the screen
It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time. Find out the angular speed of the wheel at t = 2.30 s.
Calculate the deBroglie wavelength of electrons that have been accelerated by 50,000 Volts (Remember the relation between energy and momentum). The answer is 5.486*10^-12 meters, but I'm not sure how to get it.
The electricity supplied through a city power line is transmitted at 14,300 V. On each city block there are one or more neighborhood transformers on utility poles that transform the potential difference to 120 V, as used in homes and businesses (2..
A proton has a mass of 1.67 x 10^-27 kg and a charge of 1.60 x 10^-19 C. What is the gravitational force on a single proton at Earth's surface.
Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 8cm. what's the balloon's new radius
You have a cylindrical cup of water that springs a leak 5 cm below the surface of the water. What is the velocity of the water coming out of the hole
find the x and y components of each vector.
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