Saturday
May 25, 2013

# Posts by Kirk

Total # Posts: 65

physics
A 70g steel bullet moves at 200m/s just before imbedding itself into a thick anchored wood post. If 70% of the initial kinetic energy goes into heating the bullet (steel c = 460 J/kg-C)...how hot does the bullet become if it initially is at 26 degrees Celsius? What would be th...

physics
an ideal fluid in a pipe of diameter 14cm is moving at 6.0m/s. If the incompressible fluid density is 1.05grams/cc, what is the flow rate in kg/s and what is the speed of flow if the pipe narrows to 4.0cm radius?

physics
A wire of diameter 0.65mm and length 6.0m stretches 10mm when 5.5kg is hung from it. What is the Young's modulus for the wire and what is the effective spring constant for the stretching wire

MAT101
Thank you, I was stuck on this for several hours to how to write this out, thank you again!

MAT101
Suppose you have a cookie stand, and when you charge \$3 per cookie box you sell 200 boxes. But when you raise your price to \$4 you only sell 120 boxes. Write the equation for the number of boxes you sell as a function of the price you charge. Denote "b" for the numbe...

Geometry
The Great Pyramid of Cheops is a right square pyramid with height of 148 m and a square base with a perimeter of 940 m. The Transamerica Building in San Francisco has the basic shape of a right square pyramid that has a square base with a perimeter of 140 m and a height of 260...

Geometry
Find the cost of carpeting the following rectangular rooms: a. Dimensions: 6.5 m * 4.5 m; cost = \$13.85>m2 b. Dimensions: 15 ft * 11 ft; cost = \$30>yd2

Math
Explain how you would find the volume of an irregular shape.

Math
John claimed he had a garden twice as large as Al’s rectangular- shaped garden that measured 15 ft by 30 ft. When they visited John’s rectangular-shaped garden, they found it measured 18 ft by 50 ft. Al claimed that it could not be twice as large since neither the le...

Math
Which of the following properties do not change under a size transformation? Explain how you can be sure of your answers. a. Distance between points b. Angle measure c. Parallelism; that is, if two lines are parallel to each other, then their images are parallel to each other.

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