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The age of a piece of wood from an ancient source is determined by carbon dating. The carbon-14 content of a sample of the wood is found to be one-fourth that of living trees. The half life of carbon-14 is 5730 years. How old is the piece of wood?
The water is near freezing in temperature. Typically a human can only swim in such water for about 5 minutes before hypothermia sets in. Calculate the time the explorer spends in the water if the river is 87.3 feet wide
An AC generator is connected across a single circuit element and supplies a peak voltage of 250 V. The peak current through the element is 6.1 A. What is the rms current through the circuit element?
Equak amounts of heat are added to equal masses of iron andsilver at the same initial temperature. Which metal will have the higher final temperature?
What is the tangential acceleration of a bug on the rim of a6.0 in. diameter disk if the disk moves from rest to an angular speed of 77 rev/min in 4.0s? When the disk is at its final speed, what is the tangential velocity of the bug? What is its cent..
A 35.0-mH inductor has a reactanceof 1.50 kΩ. What is the frequency of the ac current that passes through the inductor? What is the capacitance of a capacitor that has the same reactance at this frequency?
A 500.0 g pot of water at room temperature (20.0C) is placed on a stove. How much heat is required to change this water to steam at 100C
A flat coil of wire is used with an LC-tuned circuit as a receiving antenna. The coil has a radius of 0.35 m and consists of 480 turns. find the magnitude of the average emf induced in the antenna
A block of wood (Mblock = 5.2 kg) rests on a horizontal surface for which the coefficient of kinetic friction is 0.32. find the initial velocity of the bullet before impact
A batted baseball leaves the bat at an angle of 30.0^\circ above the horizontal and is caught by an outfielder 360 {\rm ft} from home plate at the same height from which it left the bat
A 3.7 L volume of ideal neon gas (monatomic) is at a pressure of 2.9 atmospheres and a temperature of 330 K. The number of neon atoms in the gas is closest to
Assuming that solar panels currently sell for about $2.50 per watt of peak output power and that Xcel energy currently bills customers for electricity at about $0.10 per kilo-watt hour, how long will it take a solar panel installation to pay for itse..
Question: A refrigerator plant for a food store operates as a reversed carnot heat engine cycle.The store is to be maintained at a temperature of -5 and the heat transfer from the store to the cycle is at the rate of 5kW. If heat is transferred fr..
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