Why does exhaled air appear as a little white cloud in the winter (Fig. 13–30)? FIGURE 13-30 Question 22.

Q: When the glass of a buret expands due to an increase in temperature does the diameter of the bore…

A: Diameter of bore will also increases

Q: -21 metric platinum bars in the center of the scales, precisely calibrated at 270°C. Find the…

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Q: The average coefficient of volume expansion for carbon tetrachloride is 5.81 x 10-4 (°C)-1. If a…

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Q: When you blow on the back of your hand with your mouth wide open, your breath feels warm. But if you…

A: When we blow out air keeping your mouth wide open your hand feels hot because the air has the…

Q: The gas in a constant-volume gas thermometer has a pressure of 97.6 kPa at 0.00 °C. Assuming ideal…

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Q: 2-21 We consider a thin element of thickness Ar in a large plane wall (see Fig. 2-13 in the text).…

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Q: A ring hole 1.81 cm in diameter at temprature 13 °C is cut in a sheet of copper (a = 17 x 10-0 c-1).…

A: Ans:-Image-1

Q: Consider laminar forced convection in a circular tube. Will the heat flux be higher near the inlet…

A: In general, the heat transfer coefficient and wall shear stresses are higher at the region where the…

Q: The U-tube in Fig. 2-18, of uniform cross section I cm?, contains mercury to the depth shown. The…

A: Given:  Barometric pressure, P=150 Torr=150×0.0999 cmHg=14.985 cm Hg Cross-section, A=1cm2 Left side…

Q: When the temperature changes during the day, which scale, Fahrenheit or Celsius, will have the…

A: The change in degree in both temperature scales can be found as follows.

Q: 4.7. For a pure buoyant plume, it can be shown that the vertical velocity and the buoyancy factor of…

A: Buoyancy force is a upward force.

Q: 2.21 What is the ratio of the dynamic viscosity of air to that of water at standard pressure and a…

A: Dynamic viscosity is a basically resistance between layer of fluids. Kinematic viscosity is the…

Q: 3. A Styrofoam cooler has total wall (including the lid) of 0.80 square mete wall thickness 2.0 cm.…

A: GivenA=0.8 m2∆x=2 cm=0.02 m

Q: 4.103 On June 24, 2003, a violent tornado occurred near Manchester, ND. A pressure drop of 100 mbar…

A: As we know the relationship Between velocity and pressure, v = √(γP/ρ)  Given,  γ = 1.4 (air)  P =…

Q: A premature baby in an incubator can be dangerouslycooled even when the air temperature in the…

A: For premature babies, the rate at which the moisture is lost through the skin by evaporation is very…

Q: If a physician interested in fluctuations in skin temperature of 0.1 degree about a normal value of…

A: Given:Normal temperature = 300Kfluctuation = 0.1 ˚K

Q: Can a medium involve (a) conduction and convection,(b) conduction and radiation, or (c) convection…

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Q: Two bodies made of the same material have the same exter- nal dimensions and appearance, but one is…

A: Solution: As given two bodies of same material, dimensions and material. On heating what will be…

Q: The force of air particles over an area is O temperature. O pressure. O volume. O kelvins.

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Q: With few exceptions, it is reasonable to say: The viscosity of gases increases, as the temperature…

A: for liquid  viscosity is inversely proportional to square of temperature. that is if temperature…

Q: A metallic axle with a diameter of 20mm has to be fitted into a wheel which has a circular hole at…

A: Given: Diameter of metallic axle D= 20mm Diameter of wheel d= 18.5mm To fit the axle into the hole,…

Q: Air is a bad conductor of heat , but still we donot feel warm without clothes, Why?

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Q: 2.62 Water is at 20°C, and the pressure is lowered until bubbles are noticed to be forming. What…

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Q: Suppose that liquid mercury and glass both had the same coefficient of volume pansion. Would a…

A: Solution

Q: The titanium shell of an SR-71 airplane would expand when flying at a speed exceeding 3 times the…

A: The length of the rod L0 at 0 degree Celsius and the length of the rod L at T degree Celsius can be…

Q: Explain why a marble floor appears colder than cemented floor in winter though both are at same…

A: We feel an object cold because it takes away heat from our body when we come into contact with that…

Q: The medicinal thermometer commonly used in homes can be read ;0.1°F, whereas those in the doctor’s…

A: Percentage error can be determined as the difference between the true value and the experimental…

Q: What happens to the density of quantity of gas when its temperature is decreased and its pressure is…

A: From Charles law, it is know that when the pressure of the gas is kept constant, volume and…

Q: A quantity of air at normal temperature is compressed : (a) slowly (b) suddenly to one-third of the…

A: Assume that the normal temperature is 273 K.

Q: The coefficient of linear expansion of a certain metal is 1 x 10^-5 /C degree. The volume of the…

A: Coefficient of linear expansion is 1 x 10-5 /C Side of the cube is a = 5 cm Initial temperature is…

Q: A balloon contains 10 g of Hz gas. What additional weight of argon gas ( at. Wt 40) must be added so…

A: Buoyant force =weight of liquid (fluid )displaced

Q: By how much does the pressure of gas at 0 degree celsius contract for each decrease in temperature…

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Q: Which is greater—an increase in temperature of 1 Celsius degree or an increase of 1 Fahrenheit…

A: The relation between Celsius and Fahrenheit scale,

Q: Why can we assume air is diatomic?

A: At room temperature or generally the major portion of air comprises of oxygen and nitrogen and both…

Q: A glass window pane is exactly 20 cm by 30 cm at 10 C. By how much has its area increased when its…

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Q: At what wind speed does −10ºC air cause the same chill factor as still air at −29ºC ?

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Q: A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30…

A: T1 = 20 °C L1 = 2.4 cm = 2.4 x 10-2 m L2 = 2.41 cm = 2.41 x 10-2 m  Coefficient of linear expansion…

Q: By the end of a hot summer day, the temperature in the city reached 33oC, while in the countryside…

A: Breeze blows from regoins which have high pressure to regions which have low pressure.

Q: (II) How long does it take the Sun to melt a block of ice at0°C with a flat horizontal area 1.0m2…

A: Formula of Insolation energy is as follows: I=ScosZ=EAt…

Q: A fever thermometer that contains (0.01cm3) of mercury, if a 10C change corresponds to a level…

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Q: The base of an insect's leg is approximately spherical in shape ,with a radius of about 2x10-5 m.…

A: Given data: The radius of sphere is r=2×10-5 m. Mass of insect is m=0.003 g.

Q: The base of an insect's leg is approximately spherical in shape ,with a radius of about 2x10-5 m.…

A: