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AIDS clinical trials. Now that effective treatments for AIDS are at last available, is it ethical to test treatments that may be less effective? Combinations of several powerful drugs reduce the level of HIV in the blood and at least delay illness and death from AIDS. But effectiveness depends on how damaged the patient's immune system is and what drugs he or she has previously taken. There are strong side effects, and patients must be able to take more than a dozen pills on time every day. Because AIDS is often fatal and the combination therapy works, we might argue that it isn't ethical to test any new treatment for AIDS that might possibly be less effective. But that might prevent discovery of better treatments. This is a strong example of the conflict between doing the best we know for patients now and finding better treatments for other patients in the future. How can we ethically test new drugs for AIDS?
An elastic cord is 64 cm long when a weight of 56 N hangs from it and is 69 cm long when a weight of 83 N hangs from it. What is the "spring" constant of this elastic cord.
A 50,000 locomotive, with steel wheels, is traveling at 7.0 on steel rails, How far will the locomotive roll before it comes to a stop
A vector has an x-component of ?21.0units and a y-component of 50.0 units. Find the magnitude and direction of the vector
A roller coaster starts at a point 30 m above the bottom of a dipwith a speed of 25 m/s. Neglect friction, what will be the speed ofthe roller coaster at the top of the next slope, which is 45m above the bottom of the dip?
You've been sent to a new planet. In order to determine the planet's free-fall acceleration, At what time is the ball at its maximum height
A prescription for a corrective lens calls for + 3.50D. The lens maker grinds the lens from a "blank" with n = 1.56 and a preformed convex front surface of radius of curvature of 31.0cm. What should be the radius of the curvature of the other surfa..
A simple camera is placed in front of this mirror to monitor the activity in the loading dock. The camera consists of a single converging lens of focal length 3.75 cm, placed 4.0 cm in front of a CCD array. A truck enters the loading dock and sto..
a 40 x 10^3 kg train is travelling at 8.3m/s when the engineer sees a sheep on the tracks. she throws the emergenxy brakes on. How long is it before the rain will come to a complete stop
Find out the force each hand exerts on the shaft when the shaft is rotating in the horizontal plane about its center at 5×10-2 {rm rev/s}.
A ray of white light is incident on an Acrylic surface at an angleof 40 degrees. calculate the angel of refraction for the blue and redlight
q1. the coefficient of static friction between the 3000 lb cars tires and the road is 0.5. determine the steepest grade
One end of a spring is attached to a wall. A 26 {\rm N} pull on the other end causes the spring to stretch by 3.4 {\rm cm}. What is the spring constant?
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