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In the Bohr model, the electron is imagined to move in a circular orbit about a stationary proton. If the speed of the electron were 8.9 x 105 m/s, obtain what would be the corresponding orbital radius?
A golf ball is hit on a 7.2m tall hill at 23m/s and 30° above the horizontal, what is its velocity at the peak of its flight
the rear window of a van is coated with a layer of ice at 0degc. the density of ice is 917 kgm3 and the latent heat of
Design a circuit in which the output voltage leads the input voltage by 30° and the current by 90°. The input voltage is a cosine wave with an angular frequency of ?. You must show (1) the phasor diagram (2) the circuit (3) the relationship betwee..
A ball is thrown horizontally from the roof of a building 56 m tall and lands 45 m from the base. What was the ball's initial speed
A 350-kg roller coaster starts from rest at point A and slides down the frictionless loop-the-loop, How fast is this roller coaster moving at point B
A parallel-plate capacitor with circular plates of radius R is being discharged. What is the discharging current
Compact fluorescent bulbs are much more efficient at producing light than are ordinary incandescent bulbs. They initially cost much more, but last far longer and use much less electricity.
suppose a photon is equally likely to be found anywhere in an interval of 18.6 cm along the x-axis. what is the minimum
An astronomical telescope uses an objective power of +1.280 D. If the length of the telescope is 80.000 cm, what are power of the eyepiece
Two disks of identical mass however different radii (r and2r) are spinning on frictionless bearings at the same angular speed ω0, but in opposite directions. The two disks are brought slowly together. The resulting frictional force among the surfaces..
following questions are based on quality assurance and mechanical checks of a linac linear accelerator mechinea in
two small beads having charges q1 and q2 of the same sign are fixed at the opposite ends of a horizontal insulating rod
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