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Calculate the thickness of Indium foil which will absorb 1% of neutrons incident at the resonance energy for Indium (1.44 eV) where s = 28, 000 barns. At. Wt of Indium = 114.7 amu, density of Indium = 7.3 g/cm3
a soccer ball is kicked with an initial horizontal speed of 5 m/s and an initial vertical speed of 3m/s. find the ball's verical speed at the apex of the flight
The length of a steel bar increases by 0.039 % when itstemperature is increased from 0o C to 35o C. Calculate the temperature coefficient of linear expansion for thisbar. (Round the answer to three significant figures.)
A light bulb is connected to a 120 V wall socket. The current in the bulb depends on the time t according to the relation I = (1.414 A) sin[ (125.6 Hz) t ]. What is the average power delivered to the light bulb
A 0.59 kg object connected to a light spring with a force constant of 21.2 N/m oscillates on a frictionless horizontal surface. Determine the maximum speed of the object
To decide the amount of temporary hearing loss loud music can cause in humans, researchers studied a group of 20 adult females who were exposed to 108 dB music for 60 minutes.
A spaceship is visiting Planet X. While descending to the surface,its rockets produce 25 kN of upward thrust and the spaceship%u2019s speed decreases at a rate of 0.15 m/s2. What is the mass of the spaceship
A playground is on the flat roof of a city school, 5 m above the street below (see figure). The vertical wall of the building is h = 6.50 m high, Find the speed at which the ball was launched
Two new particles, which have identical positive charge q3, are placed the same 0.0434 meters apart, and the force between them is measured to be the same as that between the original particles, What is q3
If small test charge is taken as positive than why measured value of electric intensity be somewhat less than the actual value of elctric intensity and vica versa
A drum rotates around its central axis at an angular velocity of10.8 rad/s. obtain through what angle does it rotate in coming to rest
A thin spherical shell rolls down an incline without slipping. If the linear acceleration of the center of mass of the shell is 0.30g, what is the angle the incline makes with the horizontal?
A house painter stands 3 m above the ground on a 4.9-m-long ladder that leans against the wall at a point 4.7 m above the ground. find the force of friction that the driveway exerts on the bottom of the ladder
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