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!
An electronic device dissipating 30 W has a mass of 20 gm, density %u03C1= 2700 Kg/m3, a specific heat of 850 J/(kgK), and a surface area of 5 cm2. The device is lightly used, and it is on for 5 min and then off several hours, during which it cools to the ambient temperature of 25oC. Taking the heat transfer coefficient to be 12 W/(m2K) determine the temperature of the device at the end of 5 min operating period. What would the answer be if the device were attached to an aluminum heat sink ( c= 903 J/(kgK), %u03C1= 2700 Kg/m3) having a mass of 200 gm and an exposed surface of 50 cm2? Assume the device and the heat sink to be nearly isothermal and have the same thermal conductivity k=237 W/(mK) and the exposed area of device is the same as before.
Construct a 99% confidence interval for the difference in the probabilities of getting a fracture for non-cola drinking and cola drinking kids.
A student randomly guesses on all 25 questions of a true-false test. Use the normal approximation to the binomial to approximate Pr[ ], that is, that the student gets 10 or fewer questions correct.
Wheel-Rite has agreed to ship the maximum number of wheel bearings that it produces each day to Itex when an order has been received.
A nursing school wants to estimate the true mean annual income of its alumni. It randomly samples 120 of its alumni. The mean annual income was $58,700 with a standard deviation of $1,500.
A doctor believes that the variance of systolic blood pressure is 470. A random sample of 20 patients found a variance of 525. What is the smaller critical value that would be used in a hypothesis test at a .05 significance level?
Findout the margin of error for this survey if we want a 99 percent confidence in our estimate of the percent of adults over 50 who take vitamin supplements.
is ultrasound a reliable method for determining the gender of an unborn baby? there is accompanying data on 1000 births
A sample of 65 business people was randomly selected and given a leadership test. Construct a 95 percent confidence interval for the mean score on this test, using the estimated standard error of the mean.
A researcher selected a sample of 50 residents from each of 3 different cities to determine if they were willing to participate in a medical experiment. which of the following assumptions is NOT made for the F test for comparing 3 or more means?
1.an experiment was conducted to determine the effects of three different pesticides p1p2p3 on the yield of three
Standard deviation is 250 pounds. if you pull a weight of at least 4200 pounds with this tow chain, what percentage of time would you expect the chain to break.
question 1 the amount of jen s monthly phone bill is normally distributed with a mean of 50 and a standard deviation
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