Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Coffee may not affect blood pressure in women, reported an article in Mobile Register, November 9, 2005. This article was based on a study reported by the Journal of the American Medical Association (2005) that followed 155,594 mostly white female nurses, age 55 on the average, who took part in two long-running health studies. The participants were questioned periodically about their diets and health and followed for over 12 years.
a Is this an observational study or an experiment?
b Caffeine is a well-known beverage in both coffee and cola and has been shown to cause short-term increases in blood pressure. The article reported that drinking coffee doesn't seem to cause long-term high blood pressure. Can such a cause-and-effect conclusion be drawn from this study? Justify your response.
c The study also reported that women in the same study who drank four cans of cola or more each day seem to have a greater risk of high blood pressure. However, researchers cautioned that the study wasn't conclusive because sodium in cola might be a culprit. How would you describe these effects?
d Can these results be applied to all women in the United States? To all U.S. men?
Voltage, current, power, and stored energy of capacitor, Prior to t=0, a 100- uF capacitance is uncharged. Starting at t=0, the voltage across the capacitor is increased linearly with time to 100V
Three parts of asingle-phase electric system are designated A,B and C and areconnected to each other through transformers. Neglect transformerresistance and magnetizing current. The transformers are rated as follows
(a) If E=Exax andH=Hyay, begin with Maxwell's equations and determine the second order partial differential equation thatEx must satisfy. (b) Show that Ex=E0 cos (ωt-βz) is a solution of that equation for a particular value of β.
What is the bandwidth occupied by this signal, and the noise bandwidth of the receiver for this signal? Find the BER at the receiver output and the average time between errors.
The feedback capacitance of an inverting amplifier is 10pF. What is the Miller capacitance at the input if the gain of the amplifier is -120 What is the Miller capacitance at the output of the amplifier
A DT system has the unit pulse response h[nT] = (0.4)^-|n|. Find and plot the system zero-state response to the input signal x[nT] = u[(n+2)T] + u[(u-2)T]
Consider the best possible heat engine working in air at 25°C. The engine continuously converts heat from a source at 300°C to work, and heat is continuously transferred into the engine at a rate of 100 kJ/s.
Determine the bending moments and vertical reactions at the supports and sketch the BM and SF diagrams.
construct the state diagram and primitive flow table for an asynchronous network that has input and output. the input
A controlled three-phase six-pulse AC/DC converter is supplied with 60 Hz voltage of the line-to-ground RMS value U = 240 V with the output current ideally filtered by an inductor. The maximum DC power of the converter (Pd)max = 50 kW.
Why do broadcast radio stations use narrow band transmissions?
1 - utilizing the rat stereotaxic atlas in the course materials devise a surgical plan for implanting a michigan type
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd