Suppose that the laptop of Prob. 2.16 is placed in an insulating briefcase with a fully charged battery

Question: Suppose that the laptop of Prob. 2.16 is placed in an insulating briefcase with a fully charged battery, but it does not go into “sleep” mode, and the battery discharges as if the laptop were in use. If no heat leaves the briefcase, the heat capacity of the briefcase itself is negligible, and the …

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Food taxes intended to shift consumption towards a healthier diet are controversial

Question: Food taxes intended to shift consumption towards a healthier diet are controversial. Some people think that individuals should make their own choices, and if they prefer unhealthy products, the government should not interfere. In view of the fact that those who become ill will be cared for at some public expense, others argue that …

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A good hash function mimics the gold standard of a random function for all practical purposes

Question: Answer: Hashing is a basic computer science technique used in many different contexts, from dictionary data structures to load balancing and symmetry breaking, to cryptography and complexity theory. In the next few lectures we will study the following: • Desirable properties of hash families • Constructions of hash families with these properties • Applications …

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A sculptor and his assistant are carrying a wedge-shaped marble slab up a flight of stairs, as shown in the figure

Question: A sculptor and his assistant are carrying a wedge-shaped marble slab up a flight of stairs, as shown in the figure. The density of the marble is uniform. Both are lifting straight up as they hold the slab completely stationary for a moment. Does the sculptor have to exert more force than the assistant …

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Consider a city that surrounds a noisy airport. Suppose that there is no commuting travel in the city

Question: Consider a city that surrounds a noisy airport. Suppose that there is no commuting travel in the city, with the residents either retired or working at home. As a result, the only locational factor that matters is the distance to the airport, which determines how much a resident must endure (noise fall as distance …

Consider a city that surrounds a noisy airport. Suppose that there is no commuting travel in the city Read More »

An inexperienced accountant for Prestwick Company prepared the following income statement for the month of August 2015:

Question: An inexperienced accountant for Prestwick Company prepared the following income statement for the month of August 2015: PRESTWICK COMPANYAUGUST 31, 2015   Revenues:        Services provided to customers $ 17,000        Investment by stockholders 5,000        Loan from bank 15,000 $ 37,000   Expenses:        Payments to long-term creditors $ 11,700        Expenses required to provide services to customers 7,800        Purchase …

An inexperienced accountant for Prestwick Company prepared the following income statement for the month of August 2015: Read More »