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A neutral atom has electrons completely filling the shells with principal quantum number n = 1, 2, and 3. This atom contains no other electrons. How many protons does the nucleus contain? Is this an element in the periodic table?
Two 2.50-cm-diameter disks spaced 1.70mm apart form a parallel-plate capacitor. The electric field between the disks is 5.00×105V/m. What is the voltage across the capacitor
A transverse traveling wave on a cord is represented by D = 0.25 sin (6.8x + 28t) where D and x are in meters and t is in seconds. Determine maximum and minimum speeds of particles of the cord
A car rounds a circle of radius 150 m going at 10.5 m/s, What's the car's acceleration if its speed is constant
q1. a 97 kg man drops from rest on a diving board -2.8 m above the surface of water and comes to rest 0.68 s after
A 2.0-kg ball is attached to the end of a 2.5-m string to form a pendulum. This pendulum is released from rest with the string horizontal
A copper cylinder and a brass cylinder are stacked end to end, as in the drawing. Find the amount by which the length of the stack decreases
A heat engine is based on a cycle consisting of an isobaric, an isometric and an adiabatic process. Find the amount of heat for each process
A 7.70-uF capacitor and a 1250-ohm resistor are connected in series to a generator operating at 50 Hz and producing an rms voltage of 208 V. What is the average power dissipated in this circuit
An iron tower in is 317 meters tall on a cold day (T = -9.9 degrees Celsius). What is its height of the tower on a hot day
Extimate the thickness of a glass at a bright fringe and the Brewster's angle for light traveling from air to glass.
Your little brother is sitting in a wagon playing with his toys. what was the velocity of the football when you threw it towards your brother
8g of helium at an initial temperature of 280Kinteracts thermally with 7.0g of oxygen at an initial temperature of 550K What is the final thermal energy of each gas
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