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Two ice skaters, with masses of 30.0kg and 75.0kg , are at the center of a 30.0m -diameter circular rink. The skaters push off against each other and glide to opposite edges of the rink.
If the heavier skater reaches the edge in 30.0s , how long does the lighter skater take to reach the edge?
A sound wave traveling at 341m/s is emitted by foghorn of a tugboat. An echo is heard 3.30s later.
A point source of light is submerged 2.4 m below the surface of a lake and emits rays in all directions. What is the maximum radius that this circle could have
An 0.82 kg bucket full of water is being swung by a rope in a vertical circle of diameter 2.31 m. Compute the least speed a bucket must be moving so that the water doesn't fall out.
the absolute portential at the exact center of a square is 3.0v when a charge of +Q is located at one of the squares corners. What is the absolute potential at the squares center
The core of an optical fiber has an index of refraction of 1.27, What is the critical angle for total internal reflection at the core-cladding interface
Use Maxwell-Ampère's equation to calculate the maximum strength of the B-field on the perimeter of the plates; when is the B-field maximum
A purple beam is hinged to a wall to hold up a blue sign. The beam has a mass of mb = 6 kg and the sign has a mass of ms = 16.3 kg. What is the tension in the wire
Tension is maintained in a string. The observed wave speed is 25 m/s when the suspended mass is 3.0 kg. (a) What is the mass per unit length of the string? (b) What is the wave speed when the suspended mass is 1.7 kg?
An electon is accelerated through 25000 V. how much energy and what frequency will one photon have
An astroid of mass 2.1 x 10^15 kg splits apart. Asume the original astroid was at rest, what is the final velocity of the larger piece after the break, what was the intioal momentum of the system
Assume that you wish to fabricate a uniform wire out of .60 g of copper. Assume the wire has a resistance R = 0.300 and all of the copper is used.
The maximum distance from Earth to the Sun (at our aphelion) is 1.521 x 10^11 m and the distance of closest approach (at perihelion) is 1.471 x 10 ^11 m. Assume the Earth's orbital speed at perihelion is 3.027 x 10 ^ 4 m/s. (overlook the effect of th..
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