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A randomized trial is conducted to evaluate the efficacy of a new cholesterol lowering medication. The primary outcome is incident coronary artery disease. Participants are free of coronary artery disease at the start of the study and randomized to receive either the new medication or a placebo. Some suffered events , followed for 10 years.
# participants # cornary art
chol med 400 28:
placebo 400 42:
a) compute RR of disease receiving new med as compared to placebo: RR=_______.
b) compute the odds ratio (OR) of disease of new med to placebo. OR=_______.
A beam of ultraviolet radiation, with frequency of 2.56×1015 Hz is directed at a clean metal surface. Calculate the maximum kinetic energy for an electron dislodged from the surface by the radiation
Calculate the magnitude of the electric field at one corner of a square 1.43
Two boats start together and race across a 62-km-wide lake and back. Boat A goes across at 62 km/h and returns at 62 km/h. Boat B goes across at 31 km/h, and its crew, realizing how far behind it is getting, returns at 93 km/h.
At a pressure of 0.0760 atm a constant-volume ideal gas thermometer reads a temperature of 345 K. What is the thermometer's triple point pressure, Pt
a 1490 kg car has just passed a diner. the closest the car came to the diner was r=40.5, what is the current magnitude of the angular momentum of the car about the diner
In this experiment, you bend your elbow and stack coins on top of your arm, Which coins are the easiest to catch
A vertical wall (5.4 m 2.4 m) in a house faces due east. A uniform electric field has a magnitude of 164 N/C. What is the electric flux through the wall
Find out the magnitude of the truck's vertical component of displacement, answer in units of meters.
In order to calculate the number of ways of arranging a given amount of energy in a tiny block of copper, How many atoms are in the copper block
1) Find the net force acting on particle 3 due to the presence of the other two particles. Report you answer as a magnitude and a direction measured from the positive x axis.
A copper plate, with dimensions of 3 cm x 3 cm x 5cm length, width, and thickness respectively, determine the temperature rise in the plate after 10 seconds
A rectangular loop of wire with sides 0.23 and 0.39 m lies in a plane perpendicular to a constant magnetic field, compute magnitude of the average emf induced in the loop.
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