*59 In Fig. 18-45a, two identical rec-tangular rods of metal are welded end Tito end, with a temperature of T1 = 0°Con the left side and a temperatureof T = 100°C on the right side. In2.0 min, 10 J is conducted at a constantrate from the right side to the left side.How much time would be required toconduct 10 J if the rods were weldedside to side as in Fig. 18-45b?T2(a)т.(6)Figure 18-45 Problem 59.

Answered: Image /qna-images/answer/5109178a-c3d7-47c1-a3a5-22b331b0924f.jpg

Answered: *59 In Fig. 18-45a, two identical rec-…

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter1: Temperature And Heat

Section: Chapter Questions

Problem 49P: The height of the Washington Monument is measured to be 170.00 m on a day when the temperature is...

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Most automobiles have a coolant reservoir to catch radiator fluid than may overflow when 1he engine is hot. A radiator is made of copper and is filled to its 16.0L capacity when at 10.0C. What volume of radiator fluid will overflow when the radiator and fluid reach their 95.0C operating temperature, given that the fluid’s volume coefficient of expansion is =400106/C ? Note that this coefficient is approximate, because most car radiators have operating temperatures of greater than 95.0C.
The height of the Washington Monument is measured to be 170.00 m on a day when the temperature is 35.0 . What will its height be on a day when the temperature falls to -10.0 ? Although the monument is made of limestone, assume that its coefficient of thermal expansion is the same as that of marble. Give your answer to five significant figures.
Consider the latent heat of fusion and the latent heat of vaporization for H2O, 3.33 105 J/kg and 2.256 106 J/kg, respectively. How much heat is needed to a. melt 2.00 kg of ice and b. vaporize 2.00 kg of water? Assume the temperatures of the ice and steam are at the melting point and vaporization point, respectively. (a). UsingEq21.9, Q = mLF = (2.00 kg) (3.33l05 J/kg) = 6.66105 J (b).UsingEq21.10. Q = mLV = (2.00kg) (2.256106 J/kg) = 14.51106 J
Consider an object with any one of the shapes displayed in Table 10.2. What is the percentage increase in the moment of inertia of the object when it is warmed from 0C to 100C if it is composed of (a) copper or (b) aluminum? Assume the average linear expansion coefficients shown in Table 16.1 do not vary between 0C and 100C. (c) Why are the answers for parts (a) and (b) the same for all the shapes?
A 200.0 g metal container, insulated on the outside, holds 100.0 g of water in thermalequilibrium at 22.0 oC. A 21.0 g ice cube, at the melting point, is dropped into the water. Whenthermal equilibrium is reached, the temperature is 15.0 °C. Assuming there is no heat exchangewith the surroundings, calculate the specific heat for the metal.[Given cwater = 4186.0 J/kg*K and Lf = 3.34 *10^5 J/kg]
Most automobiles have a coolant reservoir to catch radiator fluid that may overflow when the engine is hot. Such a radiator, made of copper, is filled to its 11-L capacity when at 10.0°C. a. What volume of radiator fluid, in liters, will overflow when the radiator and fluid reach their 98°C operating temperature, given that the fluid’s thermal coefficient of volume expansion is 400.0 × 10-6 / °C? The coefficient of volume expansion for copper is 5.1 × 10-5 /°C.
A thirsty nurse cools a 2.00-L. bottle of a soft drink (mostly water) by pouring into a large aluminum mug of mass 0.257 kg and adding 0.120 kg of ice initially at -15.0°C If the soft drink and mug are initially at 20.0°C, what is the final tem perature of the system, assuming that no heat is lost?
An object of mass 6.50 kg falls through a height of 50.0 m and, by means of a mechanical linkage, rotates a paddle wheel that stirs 520 g of water. The water is initially at 150C. What is the maximum possible temperature rise?
A thirsty nurse cools a 2.40 L bottle of a soft drink (mostly water) by pouring it into a large aluminum mug of mass 0.249 kg and adding 0.122 kg of ice initially at -14.3 ∘C. If the soft drink and mug are initially at 21.0 ∘C, what is the final temperature of the system, assuming no heat losses? Express your answer in degrees Celsius.
A steel beam is used in the construction of a skyscraper. By what fraction ΔL/L0 does the length of the beam increase when the temperature changes from that on a cold winter day 4.2°C to that on a summer day 25.7 °C? Assume the linear expansion coefficient is 12x10-6 (C)-1.
A soldering iron has a cylindrical tip of 2.5 mm in diameter and 20 mm in length. With age and usage, the tip has oxidized and has an emissivity of 0.80. Assuming that the average convection heat transfer coefficient over the soldering iron tip is 25 W/m2·K, and the surrounding air temperature is 20°C, determine the power required to maintain the tip at 400°C.
The maximum amount of water an adult in temperate climates can perspire in one hour is typically 1.8 L. However, after several weeks in a tropical climate the body can adapt, increasing the maximum perspiration rate to 3.5 L/h. At what rate, in watts, is energy being removed when perspiring that rapidly?Assume all of the perspired water evaporates. At body temperature, the heat of vaporization of water is Lv = 24 × 105 J/kg.

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