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Chapter 17: Problem 5

The background temperature of the universe is a) \(6000 \mathrm{~K}\). b) \(288 \mathrm{~K}\). c) \(3 \mathrm{~K}\). d) \(2.73 \mathrm{~K}\). e) \(0 \mathrm{~K}\).

Short Answer

Expert verified
Answer: The approximate background temperature of the universe is 2.73 K.

Step by step solution

01

Recognize the Cosmic Microwave Background temperature

Out of the given options, we need to identify the one which is approximately equal to the known value of the temperature of the Cosmic Microwave Background radiation, which is \(2.725\mathrm{~K}\).
02

Comparison with the given options

Now, let us compare the given options with the value of the CMB temperature: a) \(6000 \mathrm{~K}\) is much higher than \(2.725 \mathrm{~K}\). b) \(288 \mathrm{~K}\) is also higher than \(2.725 \mathrm{~K}\). c) \(3 \mathrm{~K}\) is quite close to \(2.725\mathrm{~K}\) and is a representative value. d) \(2.73 \mathrm{~K}\) is even closer to \(2.725\mathrm{~K}\) and is a better representative value than c). e) \(0 \mathrm{~K}\) is much lower than \(2.725 \mathrm{~K}\).
03

Select the correct option

Comparing the given options with the value of CMB temperature, the closest value is in option d) \(2.73 \mathrm{~K}\). Hence, the correct answer is d) \(2.73 \mathrm{~K}\).

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Most popular questions from this chapter

You are outside on a hot day, with the air temperature at \(T_{0}\). Your sports drink is at a temperature \(T_{\mathrm{d}}\) in a sealed plastic bottle. There are a few remaining ice cubes in the sports drink, which are at a temperature \(T_{\mathrm{i}}\), but they are melting fast. a) Write an inequality expressing the relationship among the three temperatures. b) Give reasonable values for the three temperatures in degrees Celsius.

On a hot summer day, a cubical swimming pool is filled to within \(1.0 \mathrm{~cm}\) of the top with water at \(21{ }^{\circ} \mathrm{C} .\) When the water warms to \(37^{\circ} \mathrm{C}\), the pool overflows. What is the depth of the pool?

One thermometer is calibrated in degrees Celsius, and another in degrees Fahrenheit. At what temperature is the reading on the thermometer calibrated in degrees Celsius three times the reading on the other thermometer?

A piece of dry ice (solid carbon dioxide) sitting in a classroom has a temperature of approximately \(-79^{\circ} \mathrm{C}\) a) What is this temperature in kelvins? b) What is this temperature in degrees Fahrenheit?

For a class demonstration, your physics instructor uniformly heats a bimetallic strip that is held in a horizontal orientation. As a result, the bimetallic strip bends upward. This tells you that the coefficient of linear thermal expansion for metal T, on the top is _____ that of metal B, on the bottom. a) smaller than b) larger than c) equal to
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