Find amount of heat transfer between water and air in room
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A student studying for a vocabulary test knows the meanings of 14 words from a list of 20 words. If the test contains 10 words from the study list, what is the probability that at least 8 of the words on the test are words that the student knows?
The following regression model has been proposed to predict sales at a computer store. Y hat = 50-3(x1)+20(x2)+10(x3) where x1 = competitors previous day's sales (in $1,000s) and x2 = population within 1 mile (in 1,000s).
Suppose we take 25 i.i.d observations from normal distribution with population standard deviation known to be 30. Given the same population standard deviation, how many observations need to be collected to have a half width of 95% CI less than 10?
If you keep your living room at 20 degrees C, what is the frequency of the lowest note that you will be able to obtain from your organ?
Determine (a) the final equilibrium temperature, (b) the amount of heat transfer between the water and the air in the room, and (c) the entropy generation. Assume the room is well sealed and heavily insulated.
When the voltage is adusted so that the plates are in the same position, they would be in when the 50 mg mass is placed on the top plate, what is the value of the electric force between the plates?
The slower planet's orbital period is 6.86 years. (a) What is the mass of the star? (b) What is the orbital period of the faster planet, in years?
A) What is the maximum height of the balloon relative to the ground? B) At what time does the balloon impact? C) Where does the balloon hit the wall relative to the ground?
What is the absolute pressure at the bottom of the mercury column, when the fundamental frequency of the shortened, air-filled tube is equal to the third harmonic of the original tube?
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