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An electron and a proton have charges of an equal magnitude but opposite sign of 1.6 10-19 C. If the electron and proton in a hydrogen atom are separated by a distance of 4.3 10-11 m, what are the magnitude and direction of the electrostatic force exerted on the electron by the proton?
N attractive repulsive
A wire is formed into a circle having a diameter of 11.2 cm and is placed in a uniform magnetic field of 3.22 mT. Find the maximum torque on the wire
Two- people- are -talking at a distance of 3.0 m from where you are and you measure the sound intensity as 1.1 Ã- 10-7 W/m2. What sound intensity does the other student measure
A rock is shot up vertically upward from the edge of the top of the building. The rock reaches its maximum height 2 s after being shot. find how tall is the building
Two radio-frequency point sources S1 and S2, separated by distance d = 1.6 m, are radiating in phase with ? = 0.4 m. How many maxima does it detect
A pendulum consists of a small object hanging from the ceiling at the end of a string of negligible mass. The string has a length of 0.76 m. With the string hanging vertically, the object is given an initial velocity of 2.8 m/s parallel to the ground..
A hot dog cooker heats hot dogs by connecting them to 120 V household electricity. A typical hot dog has a mass of 50g and a resistance of 130ohm . How long will it take for the cooker to raise the temperature of the hot dog from 20c to 80c ? The ..
Bob has just finished climbing a sheer cliff above a beach, and wants to figure out how high he climbed. How high up is Bob, if the ball started from exactly 2 m above the edge of the cliff
Determine the amplitude and phase of the resultant motion when two sinuosidal motions having the same frequency and traveling in the same direction are combined, if their amplitude are 3.0 com and 4.0 cima they differe in phave by pi/2 radians.
The average density of the planet uranus is 1.27 x 10^3 kg/m^3. The ratio of the mass of neptune to that of Uranus is 1.19. The ratio of the radius of Neptune to that of Uranus is 0.969. Find the average density of Neptune.
An astronaut weighs 152 N on the surface of the moon. If the same astronaut orbits the moon at an altitude equal to the moons radius, what gravitational force does the moon exert on him at this altitude?
A silicon sample is doped with phosphorus at 1.17 parts per 1.00*10^6, Calculate the number of free (conduction) electrons per unit volume of the doped silicon in conduction electrons per cm^3
Imagine a sphere of radius R filled with negative charge of uniform charge density. The total charge is equivalent to the charge of two electrons. Now insert two protons into the sphere and assume that in spite of their presence, the negative charge ..
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