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Sampling telephone area codes
Problem: The United States currently has approximately 287 Numbering Plan Areas (NPAs) in service, corresponding to geographic regions. Each NPA is identified by a three-digit code, commonly called an area code. (More are created regularly.)16 You want to choose an SRS of 20 of these area codes for a study of available telephone numbers. Label the codes 001 to 287 and use the Simple Random Sample applet or other software to choose your sample. (If you use Table B, start at line 135 and choose only the first 5 area codes in the sample.)
A very long straight solenoid with a cross-sectional area of 5.85 cm2 is wound with 44 turns of wire per centimeter, and the windings carry a current of 0.240 Amp. Obtain the average induced emf in the secondary coil
A 28.0-kg block is connected to an empty 2.66-kg bucket by a cord running over a frictionless pulley. Calculate the acceleration of the system
The pilot of an airplane traveling 180 km/h wants to drop supplies to flood victims isolated on a patch of land 150 m below. The supplies should be dropped explain how many seconds before the plane is directly overhead?
A ray of light incident upon a mirror makes an angle of 42 with the mirror. What is an angle between the incident ray and the reflected ray.
Two spheres are cut from a certain uniform rock. One has radius 4.70cm. The mass of the other is seven times greater. Find its radius.
A 15.0N package of whole wheat flour is suddenly placed on the pan of a scale such as you find in grocery stores. If the pan has negligible weight, find the maximum distance the spring will be compressed
In the model of hydrogen atom created by Niels Bohr, the electron moves around the lone proton in the nucleus at a speed of 2.2 x106 m/s in a circle with radius 5.3 x 10-11meter. Obtain what is the kinetic energy of the electron
Michelle is enjoying a picnic across the valley from a cliff. She is playing music on her radio, what is the intensity of the music arriving at the cliff
answer the following questionsa a magnetic field that varies in magnitude from point to point but has a constant
Exactly 1.73 kg of water vapor is contained in a piston-cylinder assembly at a pressure of 1.00 MPa and temperature 600.°C. The vapor is isothermally compressed to 80.0 MPa.
A pump lifts 200 kilogram of water per hour a height of 5.0 meter. Find the minimum necessary power output rating of the water pump
Sharon is standing on a giant skateboard that is initially at rest. If we ignore frictional effects with the floor, what is the momentum of the skateboard if Sharon walks to the right with a momentum of 1000 kg*m/s?
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