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Briefly, why do elements in a given group have similar chemical properties? What are the interesting properties of noble gases? How are noble gases used in lighting? What properties of hydrogen make it very useful in chemistry?
The electric field between the plates of a parallel-plate capacitor is horizontal, uniform, and has a magnitude E. Evaluate what is the mass of the object
A system containing an ideal gas at a constant pressure of 1.22 *10^5 Pa gains 2140 J of heat. During the process, the internal energy of the system increases by 2320 J. What is the change in volume of the gas?
In a severe storm, 1.05 cm of rain falls on a flat horizontal roof in 31.0 min. obtain the average force exerted on the roof by the rain
a sprinter explodes out of the starting block with an acceleration of 4.5 ms2 which she sustains for 1.5 s. then her
a small ball with a mass of 19.1 g and a charge of -0.203 microc is suspended from the cceiling by a string. the ball
question the angular momentum of a spinning wheel is 231 kg middot m2s. after application of a constant braking torque
a peice of wood one foot square and one inch thick has a specific gravity of .5. what volume of lead would have to be
If a toaster is plugged into a source of alternating voltage with an rms value of 66.2 V, find the resistance of the toaster's heating element
A rocket is launched vertically from rest; and it burns fuel at a constant rate of 136 kg/s. Exhaust gases are expelled with a speed of 5.25 x 10^3 m/s relative to the rocket. what is the magnitude of the thrust?
A point source of light is submerged 2.2 m below the surfaceof a lake and emits rays in all directions. What is the maximum radius that this circle could have
A 69 kilogram person throws a 0.0440 kilogram snowball forward with a ground speed of 35.0 m/s. Obtain what are the velocities of the two people after the snowball is exchanged
A stone is thrown vertically downward from a cliff 210.0-m tall. During the last half second of its flight, the stone travels a distance of 46.1 m. Find the initial speed of the stone
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