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A planet orbiting a star on the other side of our galaxy has twice the radius of the earth but the same mass. What is the approximate free-fall acceleration at the surface of that planet?
One million Kilograms of water need to be pumped form a lake to a reservoir 85 meters above the lake. If the job is to be completed in 24 hours. What output power (in Hp) is required?
Assume the charge on black hole is 5740 C. At what distance from it is the electric potential equal to 1100 V.
Why does the procedure of gently vibrating the force table allow the ring to discover its true equilibrium position (and thus indicate if the system is truly balanced)? Suppose that there is no problem with the ring getting hooked on the center post.
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.93 x 104 m/s, and the radius of the orbit is 1.08 x 106 m. What is the orbital speed of the second satellite
An archeologist on a dig finds a fragment of an ancient basket woven from grass. Calculate the age of the basket
a laser beam passes through a converging lens with a focal length of 19cm... at what distance past the lens has the
which mode of heat transfer out of conduction convection and radiation is principally at work in the following
How many moles of gas are in each compartment? We remove the insulation from the extreme left end and add heat to gas A until it too is at 2 atm pressure. What is its new temperature?
question1a 23-g bullet travelling 285ms penetrates a 4.5kg block of wood and emerges cleanly at 230ms. if block is
consider two identical 70-micro-coulomb point charges each of 65 mg mass. let them initially be at rest 40 cm apart.
a. Determine the velocity of the wave on the string. b. What length of string, fixed at both ends, would create third harmonic standing wave?
A positivly charged rod is brought near them.Then, one of the two shpheres is displaced momentarily so that thetwo spheres touch briefly. After this, one shphere is found to havea net charge of 2.9nC. What is the charge in the second sphere? (Itwi..
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