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Although any life elsewhere in the universe is probably based on carbon, some science fiction writers have speculated that it could be based on another element with similar bonding properties. What element do you think they chose?
A 5.5- kg concrete block rests on a level table. A 3.7- kg mass is attached to the block by a string passing over a light, what is the coefficient of friction between the block and the table
A group of astronomers have observed a star "S2" in a 15.2-year orbit around the center of the galaxy. They measured the period of revolution T = 15.2 years, Calculate the mass of the compact object about which S2 is revolving
A wheel of radius 2m (I=MR^2) has a rotational kinetic energy of 4800 J when rotating at 20 rev/s. What is the final angular speed of the system
A29.0 kg wheel, essentially a thin hoopwith radius 1.02 m, is rotating at 280rev/min. It must be brought to a stop in 15.0 s. How much work must be done to stop it
a simple harmonic oscillator consists of a 100 g mass attached to a spring whose force constant is 104 dyne cm. the
a simple open u-tube contains mercury. when 5.9 cm of water is poured into the right arm of the tube how high above its
A 100 kg sphere and a 100 g sphere outside it are held fixed with the distance between their centers equal to 0.5 m, What are the magnitude and direction of the force on each of the spheres
the magnitude j of the current density in a certain wire with a circular cross section of radius r 2.01 mm is given by
In a double-slit experiment, light with a wavelength of 500 nm forms an interference pattern 1.5 m away from a screen. The m=2 bright fringe is observed to be .0050 m from the central maximum. What is the seperation of the two slits?
When the sound barrier is broken, a series of concentric waves of sound is produced. Does it mean when the speed of light barrier is broken, a ripple of photons are created in the space-time fabric?
An unstable particle with a mass equal to 3.34 x 10-27 kg is initially at rest. The particle decays into two fragments that fly off with velocities of 0.986c and -0.868c, respectively. Find the masses of the fragments
a 2.30-cm-high object is situated 20.1 cm in front of a concave mirror that has a radius of curvature of 13.4 cm.
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