Tuesday
September 30, 2014

Posts by Bret


Total # Posts: 8

Physics
An athlete whirls a 7.36 kg hammer tied to the end of a 1.5 m chain in a horizontal circle. The hammer moves at the rate of 1.07 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included in the length given for the chain. What is the tension ...
January 28, 2013

Physics
How much power does a water pump exert lifting 30 kg of water at a constant velocity 20 m each second
February 19, 2012

Physic
A 89.0 kg person stands on one leg and 90% of the weight is supported by the upper leg connecting the knee and hip joint-the femur. Assuming the femur is 0.640 m long and has a radius of 1.90 cm, by how much is the bone compressed?
May 7, 2011

Physic
The spout heights in the container in the figure are 15 cm, 30 cm, 45 cm, and 60 cm. The water level is maintained at a 68 cm height by an outside supply. What is the speed of the water out of the 15 cm high hole? What is the speed of the water out of the 30 cm high hole? What...
May 7, 2011

math
consider a state lottery that has a weekly television show. on this show, a contestant receives the opportunity to win $1 million dollars. the contestant picks from 4 hidden windows. behind each window is one of the following: $150,000, $200,000, $1 million, or a stopper. ...
October 23, 2008

chemistry
Posted by Bret on Friday, March 16, 2007 at 10:44am. what is the oxidation number for nitrogen in the following? NH3 NO2 1- N2 NO2Cl N2H4 For Further Reading chemistry - bobpursley, Friday, March 16, 2007 at 11:26am We will be happy to critique your thinking or work. chemistry...
March 16, 2007

chemistry
what is the oxidation number for nitrogen in the following? NH3 NO2 1- N2 NO2Cl N2H4 We will be happy to critique your thinking or work. I dont even have a clue as to how to work it out.
March 16, 2007

math
what is ....
November 30, 2006

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