Ex. 125 A body cools from 75°C to 55°C in 10 min when the temperature of the surrounding is 31 °C, at what average temperature will its th rate of cooling be that at the start ?
Q: 9. Will took a 45.0g cube of solid H20 (an ice cube) out of the freezer at -5.00°C and put it on the…
A: Given data, m=45 g θ₁ = -5°C θ…
Q: A rectangular building made of concrete has a length 50.0 feet, width 35.0 feet and height 30.0 feet…
A: Given:- A rectangular building made of concrete has a length of 50.0 feet=15.24 m, width 35.0 feet…
Q: Suppose a 1-kg parcel of air is rising in a convective updraft with a constant vertical velocity of…
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Q: Ex. 80 : A copper sphere of diameter 20 cm is coated with lampblack and maintained at a temperature…
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Q: During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled…
A: The expression for the required rate of heat transfer is,
Q: A rubber ball of radius 2.52 m and emissivity 0.940 is heated to 128°C. HINT (a) Convert the given…
A: a) The given temperature in kelvin is TK=T°C+273=128+273=401K
Q: The speed of sound in the air is 343 m/sec at 20 degree C. If the temperature is doubl<;!d (at 40…
A: Given data The speed of the sound in air is va = 343 m/s. The temperature of the air is Ti = 20°C =…
Q: Calculate the temperature the entire sky would have to be in order to transfer energy by radiation…
A: Given:- Power per unit area is 1000 W/m2 Temperature of the body is 27℃=300 K To find:- Temperature…
Q: An insulated Thermos contains 190 cm³ of hot coffee at 85.0°C. You put in a 16.0 g ice cube at its…
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Q: A 1.8m wire carrying a current of 52A is crossing through a solenoid perpendicular to the axis of…
A: SOlution: Given that length L =1.8 m current I =52A magnetic field inside solenoid B =0.55 T
Q: A steel bridge is built in the summer when its temperature is 32.0 ∘C. At the time of construction,…
A: Given Data: Length in summer i.e original length L0=81.05 m Temperature in summer i.e initial…
Q: Seals may cool themselves by using thermal windows, patches on their bodies with much higher than…
A: Given: Area of the thermal window = 0.030 m2 Temperature T = 30 °C = 303 K Temperature of the…
Q: from the sun is D = 150 million km. Using the equation to model the temperature of R² the earth,…
A: Here temperature of the earth Te=…
Q: Calculate the rate of heat conduction out of the human body, assuming that the core internal…
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Q: A 2m² large and 1 cm thick door made of steel insulates a room against its surrounding. The…
A: Solution:-Given thatArea of door (A)=2 m2Thickness (L1)=1 cm=0.01 mInside temperature…
Q: ou are in space, compare the rate of heat loss for bare skin vs. a nice thick layer of…
A: Average mass of human m=75 kg and average/room temperature T=298 K. Specific heat of human body…
Q: During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled…
A:
Q: A-2.16. The heat capacity of air is much lower than the heat capacity of water and a relatively…
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Q: A 0.136m-thick sheet of ice covers a lake. The air temperature at the ice surface is -15.4\deg C. In…
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Q: A metal of mass m metal =0.19 kg is heated to a temperature 184 C.Once the metal reaches to this…
A: Mass of metal mmetal = 0.19 kg The initial temperature of metal Tm = 184o C = 184 + 273 = 457 K Mass…
Q: winter hikers dog generates heat at a rate up to a maximum value of 120 W. She is hiking on a brisk…
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Q: Mars’s Perseverance Rover left the NASA’s space station with an ambient temperature of 54°F. During…
A: (a) Let C, F, R, and K denotes Celsius, Fahrenheit, Rankine, and Kelvin. The relation between…
Q: A 20 gallon automobile gasoline tank is filled exactly to the top at 0 °F just before the automobile…
A: Original volume = 0.2 Gallon Initial temperature = 0 F = -17.778 C Final temperature = 70 F = 21.11…
Q: During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled…
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Q: Earth absorbs energy from the Sun at a rate of 1.7e17 W. About this much energy is emitted away as…
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Q: Number 3 A food product with 73% moisture content in a 5 cm diameter can wants to be frozen. The…
A: Given data- Density of the product=970 kg/m3 Thermal conductivity of the product=1.2 W/m.K Freezing…
Q: The height of the Washington Monument is measured to be 170 m on a day when the temperature is…
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Q: A 32 cm x 20 cm stained glass window is 16.0 mm thick and made of a glass with thermal conductivity…
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Q: 3. Because of the pressure inside a popcorn kernel, water does not vaporize at 100°C. Instead, it…
A: Given: The boiling point of water is 175 C. The mass of corn is 95.0 g. The percentage of water in…
Q: The height of the Washington Monument is measured to be 170 m on a day when the temperature is…
A: Length of monument at 39 degree celsius (L) = 170 m New temperature = -16.5 degree celsius
Q: 3) a) A Pyrex baking dish with a mass of 545g warms up by 96.7 °C w hen it absorbs 30.9 k of heat…
A: Equation for heat energy is,
Q: In an winter month the weather channel reported that the current temp at the Galen of Fairbanks in…
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Q: The height of the Washington Monument is measured to be 170 m on a day when the temperature is…
A:
Q: The height of the Washington Monument is measured to be 170 m on a day when the temperature is…
A: The height of Washington Monument, L0=170 m The temperature at the day time, T=37.0°C The…
Q: One winter day, the climate control system of a large university classroom building malfunctions. As…
A: Given: The volume of cold air is 500 m3. Time duration is 1 min. The temperature change is 10…
Q: A pot holds 2.95 kg of liquid water at 100.0 °C (at the boiling point). The bottom of the pot is…
A: a) The rate of heat conduction, dQdt = KA(T2-T1)d where K is the thermal conductivity A is the area…
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