Conceptual Physical Science (6th Edition)
6th Edition
ISBN: 9780134060491
Author: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt
Publisher: PEARSON
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Textbook Question
Chapter 7, Problem 86E
Alcohol evaporates more rapidly than water at the same temperature. Which produces more cooling; alcohol or the same amount of water on your skin?
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#7. (14) A single rod of length 54.0 cm is made from a 22.0-cm rod of steel and a 32.0-cm rod of aluminum. If the combined rod is subjected to a 45.0°C temperature difference, then what is its total increase in length?
Question:
1). Compare the heat needed in taking 1 kg of gold from 25° C to 2700° C to taking 1 kg water from (– 30° C) to 1000° C. Which is more and why?
-Given temperature changes don’t happen until the phase changes, there should
be some dependance on the amount of stuff (mass) changing phase and there is:
Q = m Lv (vaporizing/condensing)
Q = m Lf (melting/freezing)
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How much heat is absorbed by a persons hand if 100 grams of steam at 100°C is first converted to liquid water at 100°C and then cooled to normal body temperature?
Which causes the more severe burn hot water or steam? Why?
Chapter 7 Solutions
Conceptual Physical Science (6th Edition)
Ch. 7 - What is the role of loose electrons in heat...Ch. 7 - What is the explanation for a barefoot firewalker...Ch. 7 - Does a good insulator prevent heat from getting...Ch. 7 - By what means is heat transferred by convection?Ch. 7 - What happens to the temperature of air when it...Ch. 7 - Why is Millies hand not burned when she holds it...Ch. 7 - Why does the direction of coastal winds change...Ch. 7 - How is the peak frequency of radiant energy...Ch. 7 - What is terrestrial radiation? How does it differ...Ch. 7 - Prob. 10RCQ
Ch. 7 - Why does the pupil of the eve appear black?Ch. 7 - Does a red-hot poker radiate more when it is...Ch. 7 - Prob. 13RCQCh. 7 - Does Newtons law of cooling apply to warming as...Ch. 7 - What would be the consequence to Earths climate if...Ch. 7 - What is meant by the expression You can never...Ch. 7 - What are the four common phases of matter?Ch. 7 - Prob. 18RCQCh. 7 - What is evaporation, and why is it a cooling...Ch. 7 - What is sublimation?Ch. 7 - What is condensation, how does it differ from...Ch. 7 - Prob. 22RCQCh. 7 - Distinguish between evaporation and boiling.Ch. 7 - Why does water not boil at 100C when it is under...Ch. 7 - Is it the boiling of the water or the higher...Ch. 7 - Prob. 26RCQCh. 7 - Why does decreasing the temperature of a liquid...Ch. 7 - Why doesnt water freeze at 0C when it contains...Ch. 7 - Does a liquid give off energy or absorb energy...Ch. 7 - Does a gas give off energy or absorb energy when...Ch. 7 - Show that 5000 cal of heat is needed to increase...Ch. 7 - Prob. 41PACCh. 7 - Show that 4000 cal of heat is needed to melt 50 g...Ch. 7 - Prob. 43PACCh. 7 - Show that 27,000 cal is needed to turn 50 g of...Ch. 7 - Calculate the quantity of heat needed to turn 200...Ch. 7 - Show that a total of 36,000 calories is needed to...Ch. 7 - Show that 9300 cal of heat a needed to change 15 g...Ch. 7 - Show that 100 g of 100C steam will completely melt...Ch. 7 - A small block of ice at 0C is subjected to 10 g of...Ch. 7 - The specific heat capacity of ice is about 0.5...Ch. 7 - A 10-kg iron ball is dropped onto a pavement from...Ch. 7 - A black of ice at 0C is dropped and completely...Ch. 7 - Fifty grams of hot water at 80C is poured into a...Ch. 7 - A 100-g chunk of 80C iron is dropped into a cavity...Ch. 7 - The heat of vaporization of ethyl alcohol Lv it...Ch. 7 - From greatest to lowest, rank these materials for...Ch. 7 - From greatest to least, rank the frequency of...Ch. 7 - Rank the boiling-water temperature at the...Ch. 7 - From greatest to least, rank the energy needed for...Ch. 7 - Between the act of standing barefoot on top of an...Ch. 7 - Which will cool your finger faster, touching a...Ch. 7 - Wood is a better insulator than glass. Yet...Ch. 7 - Visit a snow-covered cemetery and note that the...Ch. 7 - Wood has a very low conductivity. Does it still...Ch. 7 - What is the purpose of the copper or aluminum...Ch. 7 - Many tongues have been injured by licking a piece...Ch. 7 - Prob. 67ECh. 7 - When air is rapidly compressed, why does its...Ch. 7 - When you blow air onto your hand from your...Ch. 7 - Snowmaking machines used at ski areas blow a...Ch. 7 - From a position near an incandescent lamp, turn it...Ch. 7 - The source of the heat of volcanoes and natural...Ch. 7 - Prob. 73ECh. 7 - If everything radiates, why doesnt every tiling...Ch. 7 - What is the name given to radiant energy emitted...Ch. 7 - Prob. 76ECh. 7 - You enter a crowded and chilly classroom early in...Ch. 7 - In terms of physics, why do restaurants serve...Ch. 7 - Why isnt it important to convert temperatures to...Ch. 7 - Which decreases in temperature more rapidly, a...Ch. 7 - Which will warm by 15C quicker in a 100C oven: a...Ch. 7 - Why is a water-based white solution (whitewash)...Ch. 7 - If the composition of the atmosphere were charged...Ch. 7 - Consider the solar energy that enters a florists...Ch. 7 - What does the planet Venus have to do with Earths...Ch. 7 - Alcohol evaporates more rapidly than water at the...Ch. 7 - You can determine wind direction by wetting your...Ch. 7 - Why does a dog pant when it is hot?Ch. 7 - Give two reasons why pouring a cup of hot coffee...Ch. 7 - Porous canvas bags filled with water are used by...Ch. 7 - Why does wrapping a bottled beverage in a wet...Ch. 7 - A friend says that the reason why you feel...Ch. 7 - Prob. 93ECh. 7 - Double-pane windows have nitrogen gas or very dry...Ch. 7 - Boiling can be brought about by increasing the...Ch. 7 - Why does the boiling temperature of water decrease...Ch. 7 - Room-temperature water boils spontaneously in a...Ch. 7 - Your inventor friend proposes a design for...Ch. 7 - When boiling spaghetti, is your cooking time...Ch. 7 - Why does putting a lid over a pot of water on a...Ch. 7 - In the power plant of a nuclear submarine, the...Ch. 7 - Distinguish between melting and freezing in terms...Ch. 7 - How do the temperature at which a particular metal...Ch. 7 - Discuss why half-frozen fruit punch is always...Ch. 7 - What role does antifreeze play in preventing the...Ch. 7 - Prob. 106ECh. 7 - When can you withdraw heal from a substance...Ch. 7 - What dots an air conditioner have in common with a...Ch. 7 - Air-conditioning units contain no water...Ch. 7 - Prob. 110ECh. 7 - Prob. 111ECh. 7 - Wrap part of a fur coat around a thermometer....Ch. 7 - What is the principal reason why a feather quilt...Ch. 7 - Friends in your discussion group say that when you...Ch. 7 - If all the molecules in a liquid had the same...Ch. 7 - What is the source of energy that keeps the...Ch. 7 - How do the average kinetic energies of hydrogen...Ch. 7 - In a mixture of U-238 and U-233 isotopes, which...Ch. 7 - A number of objects at different temperatures...Ch. 7 - Why can you drink a cup of boiling-hot tea atop a...Ch. 7 - Hydrothermal vents are openings in the ocean floor...Ch. 7 - Suppose that at a restaurant, you are served...Ch. 7 - If you wish to save fuel and youre going to leave...Ch. 7 - If you wish to save fuel and you're going to leave...Ch. 7 - Place a jar of water on a small stand on the...Ch. 7 - Prob. 126DQCh. 7 - Prob. 127DQCh. 7 - Why does placing a tub of water in a farmers...Ch. 7 - Why does spraying fruit trees with water before a...Ch. 7 - The snow-covered mailboxes raise a question: What...Ch. 7 - A firewalker walking barefoot across hot wooden...Ch. 7 - Thermal convection is linked most closely to (a)...Ch. 7 - When air is rapidly compressed, its temperature...Ch. 7 - Prob. 4RATCh. 7 - Planet Earth loses heat mainly by (a) conduction....Ch. 7 - Compared with terrestrial radiation, the radiation...Ch. 7 - Prob. 7RATCh. 7 - When evaporation occurs in a dish of water, the...Ch. 7 - When steam changes phase to water, it (a) absorbs...Ch. 7 - Boiling and freezing can occur at the same time...
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