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An electron and a proton have charges of an equal magnitude but opposite sign of 1.6 x 10-19-11 C. If an electron and proton in a hydrogen atom are separated by a distance of 5 x 10 m,
(a) What is the magnitude of the force exerted on the electron by the proton?
(b) What is the direction of the force exerted on the electron by the proton?
(c) What is the magnitude of the force exerted on the proton by the electron?
(d) What is the direction of the force exerted on the proton by the electron?
(e) What is the magnitude of the gravitational force exerted on the electron by the proton?
(f) How many times larger is the electric force acting on the electron compared to the gravitational force acting on it?
An atomic nucleus of mass 288 u moving at 405m/s emits an alpha particle of mass 4.0 u in the direction of its velocity. If the remaining nucleus slows to 360m/s, what velocity does the alpha particle have when it is emitted.
The normal range of hearing is about 20 to 20000 Hz. Assume that your hearing range is 27 to 19500 Hz. (Use 340 m/s as the speed of sound.) What is the greatest length of an organ pipe
A duck is floating on a lake with 21% of its volume beneath the water. What is the average density of the duck
The highest barrier that a projectile can clear is 14.6 m, when the projectile is launched at an angle of 17.0° above the horizontal. What is the projectile's launch speed
What is the minimum value of the coefficient of static friction that would keep the blocks from moving ? what is the acceleration on the moving blocks when the coefficient of kinetic friction UK is .070?
A skateboarder shoots off a ramp with a velocity of 6.3 m/s, directed at an angle of 58° above the horizontal. how far is this point horizontally from the end of the ramp
A laser beam is incident on a 45°-45°-90° prism perpendicular to one of its faces, Find the index of refraction of the prism
The amount of chemical energy released in burning heating oil is approximately 130 MJ per gallon. This is the amount of energy released as heat
Two tugboats pulls a disabled supertanker. Each tug exerts a constant force of 1.80x106 N, What is the total work they do on the supertanker
The coefficient of performance of a refrigerator is 3.4. The compressor uses 20 J of energy per cycle. How much heat energy is exhausted per cycle
Explain 'doping' Silicon. How does this process make a material a semi-conductor? Explain how the material is used as a switch in a transistor.
The electrric field between the plates of a parallel-plate capacitor is horizontal, uniform, and has a magnitude E. What is the magnitude of the electric field
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