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Testosterone for older men.
As men age, their testosterone levels gradually decrease. This may cause a reduction in lean body mass, an increase in fat, and other undesirable changes. Do testosterone supplements reverse some of these effects? A study in the Netherlands assigned 237 men aged 60 to 80 with low or low-normal testosterone levels to either a testosterone supplement or a placebo. The report in the Journal of the American Medical Association described the study as a "double-blind, randomized, placebo-controlled trial."10 Explain each of these terms to someone who knows no statistics.
A baseball has a velocity of 41.5 m/s (92.8 mi/h), directed horizontally, as it is released by a pitcher. Calculate the ball's instantaneous acceleration just before it is released
Electrons emitted by the photoelectric effect are accelerated and then strike a phosphorescent screen, causing it to glow more brightly than the original scene.
A machine shop grinding wheel accelerates from rest with a constant angular acceleration of 2.6 rad/s^2 for 7.6 s, Find the total number of revolutions turned
Neutrons (RBE = 2.0) and some unknown radiation type have the same biologically equivalent dose. What is the RBE for the unknown radiation
the cordinate of a particles in meters is given by x(t) = 32t-t^3 where time in seconds. what is the velocity as function of time
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An L-R-C series circuit is constructed using a 175? resistor, a 12.5?F capacitor, and an 8.00-mH inductor, find the potential difference across the ac source
Two parallel slits are illuminated by light composed of two wavelengths. One wavelength is ?A = 630nm. The other wavelength is ?B and is unknown. What is the unknown wavelength
A fireman d = 49.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of ?i = 27.0° above the horizontal, at what height will the stream of water strike the building
A square wire carrying a current of 5 A has sides of 10 cm and is placed in the yz plane. The torque on the square is
The rabbit runs at its maximum speed of 8.00 m/s toward the goal for 0.800 km and then stops to tease the tortoise. How close to the goal can the rabbit let the tortoise approach before resuming the race?
A parallel-plate air capacitor has a capacitance of 400pF and a charge of magnitude 0.150\muC on each plate. What is the area of each plate
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