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Some of the earliest atomic models held that the orbital velocity of an electron in an atom could be correlated with the radius of the atom. If the radius of the hydrogen atom is 6.83?10?11m and the electrostatic force is responsible for the circular motion of the electron, what is the kinetic energy of this orbital electron?
It is 155cm from your eyes to your toes. You're standing 190cm in front of the tall mirror. How far is it from your eyes to the image of your toes.
A wire streches from the top of a vertical pole to a point on level ground 16 feet from the base of the pole. if the wire makes an angle of 62 degrees withe the ground, find the height of the pole and length of the wire.
A 2.16 kg block on a horizontal floor is attached to a horizontal spring that is initially compressed 0.0320 m. The spring has force constant 840 N/m.
The largest building in the world by volume is the Boeing 747 plant in Everett, Washington. It measures approximately 634 m long, 709 yards wide, and 108 ft high. a)What is its volume in cubic feet? b) Convert your result from part A to cubic mete..
An airplanes airspeed (relative to still air) is 135 mph. The wind speed relative to the ground is 37 mph and is directed at theta = 51 deg
An 18 g rifle bullet travelling 180m/s buries itself in a 3.6kg pendulum hanging on a 2.8 m long string, which makes the pendulum swing upward in an arc. Verify the horizontal component of the pendulum's displacement.
At one instant a bicyclist is 28 m due east of a park's flagpole, going due south with a speed of 8 m/s. after that, 11 s later, the cyclist is 65 m due north of flagpole, going due east with a speed of 10 m/s.
Two children tug on a toy of mass 2.0 kg. Costa pulls with a force of 10.0N [W 30degrees S]. The toy slides with an acceleration of 2.5 m/s^2 in the direction of the net force.
Which statement is true concerning the magnitude of the net force on the plane.
The motion of peg P is constrained through the lemniscate curved slot in OB and by the slotted arm OA.
The infamous chicken is dashing toward home plate with a speed of 5.80 while he decides to hit the dirt. The chicken slides for 1.1, just reaching the plate as he stops (safe, of course).
On a summer day, the air conditioning breaks down and the air in your classroom becomes very warm and muggy with a vapour pressure of 20 hPa and a temperature of 25o C.
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