Calculate the person-time incidence rate
A prospective cohort study showed that 200 new cases of disease X occurred in 2,000 person-years. Calculate the person-time incidence rate and 95% confidence interval? Please show work.
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You apply an ac voltage that peaks at 60.0 V and observe, using an oscilloscope, that the resonance frequency occurs at 51900 s-1. What is the inductance of the inductor in millihenrys?
A block weighing 100 lbf sits on a 20º inclined surface. The coefficients of static and dynamic (kinetic) friction are 0.5 and 0.3 respectively. A force F = 10 t lbf is applied where t is in seconds
What is the maximum current when the circuit is at resonance, if the amplitude of the (ac) voltage is 48.0 V
A steam power plant operates on a simple ideal Rankine cycle between the pressure limits of 3MPa and 50kPa. The temperature of the steam at the turbine inlet is 400'C and the mass flow rate of steam through the cycle is 60kg/s.
Find the angular acceleration and the total angular displacement of the wheel during this time.
A load of 500 pounds is placed on a cylinder of 1040 carbon steel with a 2 inch radius. Calculate the stress (in psi). Show all your work. Show all of your work.
According to an airline, a particular flight is on time 95% of the time. Suppose 17 flights are randomly selected and the number of on time flights is recorded.
The water is then heated in a constant volume process until its temperature is 300 degrees celcius. Find the initial specific volume, and specific internal energy of the water in the container.
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