Author: Tru Physics

Problem 1.8 For a solid, we also define the linear thermal expansion coefficient, , as the fractional increase in length per degree: (a) For steel, is Estimate the total variation in length of a 1-km steel bridge between a cold winter night and a hot summer day.(b) The dial thermometer in Figure 1.2 uses a…

Problem 1.7 When the temperature of liquid mercury increases by one degree Celsius (or one kelvin), its volume increases by one part in 5500. The fractional increase in volume per unit change in temperature (when the pressure is held fixed) is called the thermal expansion coefficient, : (where is volume, is temperature, and signifies a…

Problem 1.6 Give an example to illustrate why you cannot accurately judge the temperature of an object by how hot or cold it feels to the touch. Solution: Problem 1.6 Solution (Download)

Problem 1.5 When you’re sick with a fever and you take your temperature with a thermometer, approximately what is the relaxation time? Solution: Problem 1.5 Solution (Download)

Problem 1.4 Does it ever make sense to say that one object is “twice as hot” as another? Does it matter whether one is referring to Celsius or kelvin temperatures? Explain. Solution: Problem 1.4 Solution (Download)

Problem 1.3 Determine the kelvin temperature for each of the following:(a) human body temperature;(b) the boiling point of water (at the standard pressure of 1 atm);(c) the coldest day you can remember;(d) the boiling point of liquid nitrogen (196 °C);(e) the melting point of lead (327 °C). Solution: Problem 1.3 Solution (Download)

Problem 1.2 The Rankine temperature scale (abbreviated °R) uses the same size degrees as Fahrenheit, but measured up from absolute zero like kelvin (so Rankine is to Fahrenheit as kelvin is to Celsius). Find the conversion formula between Rankine and Fahrenheit, and also between Rankine and kelvin. What is room temperature on the Rankine scale?…

Problem 1.1 The Fahrenheit temperature scale is defined so that ice melts at and water boils at (a) Derive the formulas for converting from Fahrenheit to Celsius and back.(b) What is absolute zero on the Fahrenheit scale? Solution: Problem 1.1 Solution (Download)