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In a regression analysis with several X variables, the sign of the coefficient estimate of one of the variables is the opposite of what you believe it should be. How would you test to determine whether multicollinearity is the cause?
A car is behind a truck going 25m/s on the highway. The car's driver looks for an opportunity to pass, guessing that his car can accelerate at 1.0m/s2. He gauges that he has to cover the 20-m length of the truck, plus 10m clear room at the rear of..
Suppose that, in a photoelectric effect experiment of the type described above, light with a wavelength of 400 nm results in a voltage reading of 0.8 Y. What is the work function for this photocathode?
The United States Department of Labor's Bureau of Labor Statistics offers an Occupational Outlook Handbook as one of its publications. Review the Handbook for the occupation you wish to enter. Write a one to two page double spaced paper discussing..
A small piece of dust of mass m = 1.4 µg travels during an electric air cleaner in which the electric field is 483 N/C. The electric force on the dust particle is equal to the weight of the particle. What is the charge on the dust particle?
LC oscillators have been used in circuits connected to loudspeakers to create some of the sounds of electronic music. which is in the audible range of frequencies
The water in the plumbing in a house is at a gauge pressure of 160000 Pa. what force does this cause on the top of the tank inside a water heater if the area of the top is .4 m^2?
when laser light of wavelenght 633.8nm passes through a diffraction grating, the first bright spot occurs at +- 18.6 degrees from the central maximum. At what angles do the third bright spots occur
In serving, a tennis player accelerates at 56 kg tennis ball horizontally from rest to a speed of 30 m/s. Assuming that the acceleration is uniform when the racquet force is applied over a distance of .5 m, what is the magnitude of force exerted on ..
The Moon rises and sets, for example, a new moon that is on an observer's latitude at 12 noon rises at 6 A.M. and sets at 6 P.M. Suppose an astronaut on the Moon saw the Earth on his longitude at 12 noon. At what time would the Earth set?
A 1.6 kg disk with radius 0.63 m is rotating freely at 55 rad/s around an axis perpendicular to its center. A second disk that is not rotating is felled onto the first disk so that their centers align, and they stick together. The mass of the second ..
a bracken fern spore produces an image that is 7.5 cm tall when placed before a converging lens of focal length 5.0 cm.
Two cars of mass 2000 kg and 1000 kg, respectively, collide inelastically. Find the initial speed and direction of the lighter car
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