How much heat energy must be removed to effect cooling
An iron skillet weighing 1.48 kg is heatedon a stove to 172°C. Suppose the skillet is cooled to room temperature, 21°C. How much heat energy (in joules) must be removed to effect this cooling? The specific heat of iron is 0.449 J/(g · °C).
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When an opinion poll calls residential telephone numbers at random, only 20% of the calls reach a live person. You watch the random digit dialing machine make 15 calls. What is the mean number of calls that reach a person?
How many ways are there first to pick a subset of r people from 50 people (each of different height), and next to pick a second subset of s people such that everyone in the first subset is shorter than everyone in the second subset?
They have a potential difference of 0.25 V. Find the numerical value of the electric field. What are the charge density and total charge on each plate? Draw the equipotential surfaces at 0.10 V and 0.20 V.
The theoretical probability of undesirable side effects resulting from taking Grebex is 2 in 19. If 570 people take Grebex to lower their blood pressure, how many will encounter undesirable side effects?
An iron skillet weighing 1.48 kg is heatedon a stove to 172°C. Suppose the skillet is cooled to room temperature, 21°C. How much heat energy (in joules) must be removed to effect this cooling? The specific heat of iron is 0.449 J/(g &middo
Consider a cold air analysis and use k=1.4/ Cv=0.718 kj/kgK/ Cp=1.005 kj/kgK. Sketch the cycle using a P-V diagram, calculate max pressure, and heat transfer into the cycle per unit mass in kj/kg.
At a subway station, eastbound trains and northbound trains arrive independently, both according to a Poisson process. On average, there is one eastbound train every 12 minutes and one northbound train every 8 minutes. Suppose you arrive at the su
A certain electromagnetic radiation has a wavelength of 5.50X 102nm. Calculate the energy of this radiation and determine the region of electromagnetic spectrum that this radiation is from.
What is the radial acceleration if the equator were sitting in a city with latitude 34 degrees? Does this rotation make us heavier or lighter? If a person weighs 100 pounds with no rotation, what would be his weight in this city with rotation?
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