Inquiry into Physics
8th Edition
ISBN: 9781337515863
Author: Ostdiek
Publisher: Cengage
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Chapter 5, Problem 34Q
To determine
The effect of heating air in a room on its relative humidity.
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Problem 2.59. Hot and cold
It is common in everyday language to refer to temperatures as "hot" and "cold."
Why is this use of language misleading? Does it make sense to say that one body is
"twice as hot" as another? Does it matter whether the Celsius or Kelvin temperature
scale is used?
Problem 1.42. The specific heat capacity of Albertson's Rotini Tricolore is ap-
proximately 1.8 J/g °C. Suppose you toss 340 g of this pasta (at 25°C) into 1.5
liters of boiling water. What effect does this have on the temperature of the water
(before there is time for the stove to provide more heat)?
If water is cooled from 130 O F to -10 O F, what is the temperature change on the(a) Fahrenheit scale (b) Centigrade scale and (c) Kelvin Scale and Rankine scale?Note: Draw the figure of a thermometer reflecting the given temperatures. Write the formulaand solve for the required quantity. Encircle or box the final answer/s.
Chapter 5 Solutions
Inquiry into Physics
Ch. 5 - Explain why the Moon and Mercury possess only very...Ch. 5 - The dwarf planet Pluto has an average surface...Ch. 5 - Prob. 1AACh. 5 - Prob. 2AACh. 5 - Discuss some of the early developments in the...Ch. 5 - Prob. 2PIPCh. 5 - In Section 5.2, we discussed the phenomenon of...Ch. 5 - Prob. 2MIOCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 2Q
Ch. 5 - Prob. 3QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 7QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 9QCh. 5 - Prob. 10QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 14QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 18QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 21QCh. 5 - Prob. 22QCh. 5 - Prob. 23QCh. 5 - Prob. 24QCh. 5 - Prob. 25QCh. 5 - Prob. 26QCh. 5 - Prob. 27QCh. 5 - Prob. 28QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 31QCh. 5 - Prob. 32QCh. 5 - Prob. 33QCh. 5 - Prob. 34QCh. 5 - Prob. 35QCh. 5 - Prob. 36QCh. 5 - Prob. 37QCh. 5 - Prob. 38QCh. 5 - Prob. 39QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 41QCh. 5 - Prob. 42QCh. 5 - Prob. 43QCh. 5 - Prob. 44QCh. 5 - Prob. 45QCh. 5 - Prob. 46QCh. 5 - Prob. 1PCh. 5 - On a nice winter day at the South Pole, the...Ch. 5 - An iron railroad rail is 700 ft long when the...Ch. 5 - A copper vat is 10 m long at room temperature...Ch. 5 - A machinist wishes to insert a steel rod with a...Ch. 5 - An aluminum wing on a passenger is 30 m long when...Ch. 5 - A fixed amount of a particular ideal gas at 16C°...Ch. 5 - em>. The volume of an ideal gas enclosed in a...Ch. 5 - A gas is compressed inside a cylinder (Figure...Ch. 5 - Prob. 10PCh. 5 - . How much heat is needed to raise the temperature...Ch. 5 - Prob. 12PCh. 5 - - (a) Compute the amount of heat needed to raise...Ch. 5 - Prob. 14PCh. 5 - . A 1,200-kg car going 25 m/s is brought to a stop...Ch. 5 - Prob. 16PCh. 5 - Prob. 17PCh. 5 - Prob. 18PCh. 5 - . On a winter day, the air temperature is — 15°C,...Ch. 5 - . On a summer day in Houston, the temperature is...Ch. 5 - . Inside a building, the temperature is 20°C, and...Ch. 5 - . On a hot summer day in Washington, D.C., the...Ch. 5 - . An apartment has the dimensions 10 in 1w 5 in 3...Ch. 5 - Prob. 24PCh. 5 - . The temperature of the air in thermals decreases...Ch. 5 - In cold weather, you can sometimes "see" your...Ch. 5 - . What is the Carnot efficiency of a heat engine...Ch. 5 - . What is the maximum efficiency that a hear...Ch. 5 - . As a gasoline engine is miming, an amount of...Ch. 5 - . A proposed ocean thermal-energy conversion...Ch. 5 - . An irreversible process takes place by which the...Ch. 5 - . The temperature in the deep interiors of some...Ch. 5 - Prob. 1CCh. 5 - Pyrex g1assware is noted for its ability to...Ch. 5 - Prob. 3CCh. 5 - As air rises in the atmosphere, its temperature...Ch. 5 - . 5. If air at 35°C and 77 percent relative...Ch. 5 - Prob. 6C
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- Police arrive at the murder scene at 1 am. Immediately, they take and record the body'stemperature, which is 80oF, and inspect the area for clues and evidence. By the time they finishthe inspection, it is 1:30 am. They again take the temperature of the body, which has dropped to70oF, and have it sent to the morgue. The temperature at the crime scene has remained steadyat 75oF. When was the person murdered?arrow_forwardThe temperature difference between the inside and the outside of a home on a cold winter day is 57.0°F. (a) Express this difference on the Celsius scale. оС (b) Express this difference on the Kelvin scale. Кarrow_forwardThis exercise uses Newton's Law of Cooling. A roasted turkey is taken from an oven when its temperature has reached 185°F and is placed on a table in a room where the temperature is 71°F. (a) If the temperature of the turkey is 150°F after half an hour, what is its temperature after 45 min? (Round your answer to the nearest whole number.) oF (b) After how many hours will the turkey cool to 100°F? (Round your answer to one decimal place.) hr thneted be 0.0it 心)arrow_forward
- The temperature C of a fresh cup of coffee t minutes after it is poured is given by C = 125e−0.03t + 67 degrees Fahrenheit. (a) Make a graph of C versus t. I answered ( a) correctly (b) The coffee is cool enough to drink when its temperature is 145 degrees. When will the coffee be cool enough to drink? (Round your answer to two decimal places.) min(c) What is the temperature of the coffee in the pot? (Note: We are assuming that the coffee pot is being kept hot and is the same temperature as the cup of coffee when it was poured. Round your answer to the nearest degree.) °F(d) What is the temperature in the room where you are drinking the coffee? (Hint: If the coffee is left to cool a long time, it will reach room temperature. Round your answer to the nearest degree.) °Farrow_forwardA surveyor uses a steel measuring tape that is exactly 75000m long at a temperature of 20 degree celcius? What is the length (in m) of the tape when them temperature is 35 degrees celcius? ( X steel = 1.2 x 10-5 / K) The answer (in fundamental Sl unit) is (type the numeric value only)arrow_forwardA new temperature scale is designed with freezing of water at 50 X and boiling at atmospheric pressure occurring at 300 X. Derive a conversion between degrees Celsius and degrees X and convert the following reading: (d) What is absolute zero in X? (round off answer to 1 decimal place)arrow_forward
- In an air conditioner, 12.65 MJ of heat transfer occurs from a cold environment in 1.00 h. (a) What mass of ice melting would involve the same heat transfer? (b) How many hours of operation would be equivalent to melting 900 kg ofice? (c) If ice costs 20 cents per kg, do you think the air conditioner could be operated more cheaply than by simply using ice? Describe in detail how you evaluate the relative costs.arrow_forwardFour kg of water is placed in an enclosed volume of 1m3. Heat is added until the temperature is 150°C. Find ( 2. a ) the pressure, ( b )the mass of vapor, and ( c ) the volume of the vapor.arrow_forwardPlease provide complete step by step answer: A customer orders 200ml of Sumatran coffee at precisely 60.0°C. You then need to drop the temperature of the coffee, initially at 90.0°C, to the ordered temperature. In order to simplify the calculations, you will start by assuming that coffee has the specific heat and density as if water. In the following parts, you will remove these simplifications. Solve now this problem assuming the density is 1.000 g/ml for coffee and its specific heat capacity is 4.184 J/(g ºC). If you had used ice cubes to cool the coffee, your calculation of q would have been a two- step process: (1) the ice at 0 oC first has to melt (energy added to go from solid to liquid; and then (2) to warm the liquid from 0 oC to the final temperature where q = mice cice + mwater cwater ∆T where cice = 2.11 J/ g . oC cwater = 4.184 J/ g . oC (Note: there is no ∆T for the first step since melting of the ice occurs at 0 oC, no temperature change) What…arrow_forward
- What is the standard unit of temperature in the SI? (Do not abbreviate; for example gram not g.)arrow_forwardYou are on a hike down the Bright Angel Trail of Grand Canyon National Park. It is a 9-mile out-and-back hike; water, shade, and bathrooms are available at the turn-around point. It's mid-August and the temperature is expected to reach triple digits by early afternoon. The day heats up quickly and it's close to 90º F by 10 am. You are ¼ mile from the turnaround point (meaning you’ve hiked about 4.25 miles from the trailhead) when you hear a man who appears to be in his 60s complaining of the heat. He begins to stagger a little while walking and is sweating profusely. He finally sits down and seems unable to walk any further. His friend mentions he was hospitalized four years ago for a heart attack and currently taking a diuretic to help prevent a second heart attack. a. What are the steps that must be taken when responding to this patient? What might be wrong with this patient? What are your immediate concerns? Does this situation require a call to 9-1-1/Search and Rescue? What care…arrow_forwardThe goal in this problem is to find the growth of an ice layer as a function of time. Call the thickness of the ice layer L. (a) Derive an equation for dL/dt in terms of L , the temperature T above the ice, and the propertiesof ice (which you can leave in symbolic form instead of substituting the numbers). (b) Solve this differential equation assuming that at t = 0 , you have L = 0. If you have studied differential equations, you will know atechnique for solving equations of this type: manipulate the equation to get dL/dt multiplied by a (very simple) function of L on one side, and integrate both sides with respect to time. Alternatively, you may be able to use your knowledge of the derivatives of various functions to guess the solution, which has a simple dependence on t. (c) Will the water eventually freeze to the bottom of the flask?arrow_forward
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