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Find an experiment. You can find the latest medical research in the Journal of the American Medical Association at www.jama.ama-assn.org and the New England Journal of Medicine at www.nejm.org. Many of the articles describe randomized comparative experiments and use the language of statistical significance when giving conclusions. Look through the abstracts and find an experiment of interest to you. If your institution has a subscription to these journals, you should be able to view the entire article. Otherwise, use the information in the abstract to answer as many of these questions as you can. What was the purpose of the experiment? How many factors were in the experiment, and what were the levels of the factors? What response(s) were measured? How many subjects were assigned to each of the treatments, and was randomization used? Was it a double-blind experiment? What were the conclusions, and were the results statistically significant?
A can of soup has a mass 420 g, height 13 cm, and diameter 5.6 cm. Calculate the moment of inertia of the can if it takes 1.5 s to reach the bottom of the incline
A cannonball is shot (from ground level) with an initial horizontal velocity of 41.0 m/s and an initial vertical velocity of 21.0 m/s. How far from where it was shot will the cannonball land
An electron is circulating in the outer Van Allen Radiation Belt is moving with a speed of 106 m/s. Compute the maximum force exerted upon the electron by the fields associated with the light of the sun
Light from a location on which you concentrate your attention fallson your fovea, which contains only cones. If you wish to observe aweak source of light, like a faint star, why should you not look directly at the source?
A uniform rod of mass 120 gram and length 50 centimeter rotates in a horizontal plane about a fixed, vertical, frictionless pin through its center. Obtain the angular speed of the system at the instant the beads reach the ends of the rod
What minimumdistance are they from each other? The angle may be too large to use small angle approximation. suppose in units of m.
Standing waves on a 1.0m long string that is fixed at both ends are seen at successive frequencies of 24 Hz and 63 Hz. What are the wave speed and fundamental frequency?
A silver rod and a common glass rod both have the same length when at 20.0°C. The silver rod is heated to 52.3°C. To what temperature must the glass rod be heated so that they are again at the same length?
a rubber ball is dropped from a height of 2.0m. after each bounce it returns to a height of 23 its starting height.i
A common flashlight bulb is rated at 0.202 A and 3.82 V (the values of current and voltage under operating conditions, estimate the temperature of the tungsten filament when the bulb is turned on
Two isotopes ofa certain element have binding energies that differ by 14.03 MeV. Find the difference in atomic mass between the two isotopes
A 13.0 kg bucket of water of is suspendedby a rope wrapped around a pulley, which is just a solid cylinder0.300 m in diameter with mass 17.0 kg. With what speed does the bucket strike the water
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