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An economist wants to estimate average annual profits for all businesses in a given community and proposes to draw a systematic sample of all businesses listed in the local Yellow Pages. Comment on the proposed methodology. What potential problem do you foresee?
A small bead of mass m is constrained to slide without friction inside a circular vertical hoop of radius r which rotates about a vertical axis at a frequency of f. Find the angle where the bead will be in equilibrium
At amusement parks, there is a popular ride where the floor of a rotating cylindrical room falls away, leaving the backs of the riders "plastered" against the wall. Suppose the radius of the room is 4.00 m and the speed of the wall is 10.4 m/s whe..
A 32.0 kilogram wheel, basically a thin hoop with radius 1.39 meter, is rotating at 280 rev/min. Determine what is the required average power
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 443 Hz when the train is approaching him.
Two clarinets are sounding tones of 190 Hz and 192 Hz, respectively. What is the beat frequency between the third modes
As a part of an exercise regime,,a lady lifts herself up from standing position at the rest,wth wait distributed normally across the soles of her feet,onto tiptoe(standing on 2 feet)which muscle group she is exercising ? is it possible to achieve ..
When resistors 1 and 2 are connected in series, the equivalent resistance is 18.7 ?. When they are connected in parallel, determine the larger resistance of these two resistors
A rope is used to pull a 6.18 kg block at constant speed 2.08 m along a horizontal floor. The force on the block from the rope is 5.70 N and directed 13.6° above the horizontal. What are the work done by the rope's force, the increase in thermal ener..
Unpolarized light passes during two polarizers in turn with polarization axes at 58° to each other. What is the fraction of the incident light intensity that is transmitted?
Work function of potassium is 2.25 eV. Find the cutoff wave length of potassium
What would be the pattern of the transmitted light on the screen? Could this be a shadow pattern of the threads in the cloth? Silk is rotated about the beam axis- what happens?
Using the mass-luminosity relationship if a main sequence star has a luminosity of 3000 times the luminosity of the Sun, what is its mass in relation to the Sun?
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