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Problem: Sampling on campus. You see a woman student standing in front of the student center, now and then stopping other students to ask them questions. She says that she is collecting student opinions for a class assignment.
Required:
1. Explain why this sampling method is almost certainly biased.
A piano tuner sounds two strings simultaneously. One has been previously tuned to vibrate at 283.0 Hz. The tuner hears 5.0 beats per second. What was the original frequency of the untuned string
Consider two inertial reference frames. while an observer in each frame measures the following quantities, which measurement made by two observers must yield the same results.
During the first stage of its launch, a space shuttle goes from rest to 4956 km/hwhile rising a vertical distance of 45.0km . Assume constant acceleration and no variation in g over this distance. A)What is the acceleration of the shuttle?
A ball of mass 0.40 kg is fired with velocity 140 m/s into the barrel of a spring gun of mass 2.1 kg initially at rest on a frictionless surface. What fraction of the ball's initial kinetic energy is stored in the spring
two 1.9kg masses are 1.5m apart center to center on a frictionless table. each has 9.3?c of charge.what is the
When its 75kW engine is generating full power, a small single engine airplane with a mass of 700 kg gains altitude at a rate of 2.5 m/s. what fraction of the engine power is being used to make the air plane climb.
capacitors c115uf and c223uf are each charged to 10v then disconnected from the battery without changing the charge on
At T = 0ºC and p = 1000mb, 1g of dry air receives during an isochoric process anamount of heat, what is the amount of heat absorbed
A ball is thrown so that its initial vertical and horizontal components of velocity are 60 m/s and 15 m/s, estimate the ball's total time of flight
What is the difference between a crime against a person and a crime against property? Give an example of each and tell where each would be placed in the Uniform Crime Reports.2. Explain "Mean" and "Standard Deviation" and how they apply to analyzing ..
A 4.30-kg ball is dropped from a height of 14.5m above one end of a uniform bar that pivots at its center. The bar has mass 6.50kg and is 4.60m in length. At the other end of the bar sits another 6.00-kg ball, unattached to the bar. The dropped ball ..
A cylinder contains a piston on each side of which is one kilomole of an ideal gas. The walls of the cylinder are diathermal, What is the change in the Helmholtz potential
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