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Two identical conducting spheres, fixed in place, attract each other by an electrostatic force of -0.2848 N when separated by 50 cm, center-to-center. The spheres are then connected with a thin conducting wire. When the wire is removed, the spheres repel each other with an electrostatic force of 0.0608 N. What were the initial charges on the spheres? Since one is negative and you cannot tell which is positive or negative, there are two solutions. Take the absolute value of the charges and enter the smaller value here. Enter the larger value here
Finish the Hydrogen atom model we started in class (1 proton at center 1 electron at 59 pico-meter to the right of it)
1) Use the proton's E-field strength there (= 4E11 N/C) to find the Force applied to the electron
2) Use the electron's mass (0.911E-30 kg) to predict the electron's acceleration there (direction, too!)
3) Use the centripetal acceleration formula (?v²/r) to discover the electron's speed around the proton.
4) How long does that electron take to go all the way around the proton?
Then, 25 s later, the cyclist is 45 m due north of the flagpole, going due east with a speed of 12 m/s. For the cyclist in this 25 s interval, find out each of the following. (a) displacement (b) average velocity (c) average acceleration
A 5.70-kg ball is dropped from a height of 12.0m above one end of a uniform bar that pivots at its center. The bar has mass 6.00kg and is 4.80m in length. At the other end of the bar sits another 5.10-kg ball, unattached to the bar. The dropped ball ..
A fire breaks out and increases the Kelvin temperature of a cylinder of compressed gas by a factor of 2.2. What is the final pressure of gas relative to its initial pressure?
When in orbit, a communication satellite attracts the earthwith a force of 19.0 kN, Find the satellite's altitude above the earth's surface
A truck is traveling at 13.0 m/s down a hill when the brakes on all four wheels lock. The hill makes an angle of 15 ° with respect to the horizontal. The coefficient of kinetic friction between the tires and the road is 0.994. How far does the truck ..
A 6.00 m long uniform rod is hinged at one end. The rod isinitially held in a horizontal position, What is the angular acceleration at the instant of release
What is the angular momentum of a figure skater spinning at 2.0rev/s with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.5 m, a radius of 15cm , and a mass of 48kg ?
A modded Prius electric car is powered by sixty lithium-iron-phosphate batteries. At a freeway speed of 108 km/h, the average frictional force on the vehicle is only 200 Newton. find what is the output voltage of the array
Suppose that by stirring 854 g of water you are able to increase its temperature from 19 degrees C to 21 degrees C. Find the increase in the water's entropy
A rifle with the barrel length of 62cm fires a 12g bullet with a horizontal speed of 380m/s. The bullet strikes a block of wood and penetrates to a depth of 14cm. What resistive force (assumed to be constant) does the wood exert on the bullet? How lo..
Resolve the position s_b of the image if an object is placed in air on the axis of the rod 16.00 cm to the left of the end of the rod.
The first bright fringe of a diffraction grating of 600 ruling/mm is found at angle of 21o. Evaluate what the wavelength of light of the source
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