Question posted by Charlesehj

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Questions Posted by Charlesehj

1 - 10 of 10
Bounty Status Category Sub-Category Question Due
$1.00 Closed, closed Physics General Physics Callisto's initial momentum
A comet fragment of mass 1.96 × 10 13 kg is moving at 6.50 × 10 4 m/s when it crashes into Callisto, a moon of Jupiter. The mass of Callisto is 1.08 × 10 23 kg. The collision is completely inelastic.... 		Jan. 14, 2010
$1.00 Closed, closed Physics General Physics Mass of astronaut
An astronaut orbits the earth in a space capsule whose height above the earth is equal to the earth's radius. How does the mass of the astronaut in the capsule compare to her mass on the earth? 		Jan. 14, 2010
$1.00 Closed, closed Physics General Physics Trajectory of bullet
A passenger at rest on a flatbed train car fires a bullet straight up. The event is viewed by observers at rest on the station platform as the train moves past the platform with constant velocity.... 		Jan. 17, 2010
$1.00 Closed, closed Physics General Physics Physics Help (Frequency)
    Two loudspeakers are located 3 m apart on the stage of an auditorium. A listener at point P is seated 29.0 m from one speaker and 25.0 m from the other. A signal generator drives the... 		Jan. 09, 2010
$1.00 Closed, closed Physics General Physics Physics Help
A guitar string produces 4 beats/s when sounded with a 250 Hz tuning fork and 9 beats per second when sounded with a 255 Hz tuning fork.  What is the vibration? 		Jan. 09, 2010
$1.00 Closed, closed Physics General Physics Physics Help (waves)
Two canoes are 10 m apart on a lake. Each bobs up and down with a period of 8.0 seconds. When one canoe is at its highest point, the other canoe is at its lowest point. Both canoes are always... 		Jan. 09, 2010
$1.00 Closed, closed Physics General Physics Physics Help (frequency)
A speaker is designed for wide dispersion for a high frequency sound.  What should the diameter of the circular opening be for a speaker where the desired diffraction angle is 11 degrees and a 9100... 		Jan. 09, 2010
$1.00 Closed, closed Physics General Physics Physics Help
A pebble is dropped in a lake; and it produces ripples with a frequency of 0.50 Hz. When should a second pebble be dropped at the same place to produce destructive interference? 		Jan. 09, 2010
$1.00 Closed, closed Physics General Physics Physics Question
The density of mercury is 1.36 x 104 kg/m3. What is the mass of a 2.16 x 10-4-3 sample of mercury? 		Jan. 05, 2010
$1.00 Closed, closed Physics General Physics Physics Help
An aluminum tank of volume 0.0300 meters cubed is filled to the top with mercury at 20 degrees C. THe tank is placed inside a chamber with an interior temperature of 70.0 degrees C. The coefficient... 		Jan. 05, 2010