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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?

Short Answer

Expert verified
Answer: 20°C (68°F)

Step by step solution

01

Write down the temperature relationship between Celsius and Fahrenheit

The formula describing the relationship between Celsius and Fahrenheit temperatures is given by: °F = (9/5)*°C + 32
02

Set up the equation for the problem

According to the problem, the Celsius reading is three times the Fahrenheit reading. So, we will set up the equation as follows: °C = 3 × °F Now we will substitute the Fahrenheit temperature from the Celsius equation into this equation: °C = 3 × ((9/5)*°C + 32)
03

Solve the equation for °C

Next, we need to solve the equation for the Celsius temperature. To solve it, we will first distribute the 3 and combine like terms: °C = (27/5)*°C + 96 Now, subtract (27/5)*°C from both sides of the equation: (1 - 27/5)*°C = 96 (-22/5)*°C = 96 To isolate °C, we will divide both sides by (-22/5): °C = 96 / (-22/5) = (-22/5) * (-5/22) * 96 = 20 So the temperature in Celsius is 20°C.
04

Convert the temperature back to Fahrenheit

Finally, we need to convert the temperature in Celsius back to Fahrenheit. We will use the relationship between Celsius and Fahrenheit: °F = (9/5)*°C + 32 °F = (9/5)*20 + 32 °F = 36 + 32 °F = 68 So the temperature in Fahrenheit is 68°F. Therefore, at a temperature of 20°C (68°F), the reading on the thermometer calibrated in degrees Celsius is three times the reading on the other thermometer.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Celsius and Fahrenheit relationship
The relationship between Celsius and Fahrenheit is a fundamental concept in temperature conversion. These two units are standard in different parts of the world: Celsius is primarily used in scientific contexts and most countries, while Fahrenheit is mainly used in the United States. Understanding how to convert between them is crucial for scientific calculations and everyday life.

The formula to convert Celsius (°C) to Fahrenheit (°F) is:
  • °F = (9/5) × °C + 32
This equation reveals the difference in zero points and the scaling factors of both units.

The Conversion Process:
The formula consists of two key operations:
  • Multiplication by 9/5, which accounts for the differences in degree size between the scales.
  • Adding 32, which aligns the zero points, as 0°C corresponds to 32°F, the freezing point of water in both units.
Thus, when you're working with temperature problems involving these units, it helps to memorize and understand this formula. Once you're familiar with it, you can easily switch between Celsius and Fahrenheit and tackle various thermometry tasks.
thermometer calibration
Calibrating thermometers is a crucial process to ensure their accuracy and reliability when measuring temperature. Calibration involves adjusting and verifying the instrument to align with established standards or known temperature values.

Why Calibration Matters:
  • Ensures that readings are precise and consistent over time.
  • Prevents measurement errors that can lead to incorrect conclusions and decisions, especially in scientific and industrial applications.
  • Maintains quality control if thermometers are used in manufacturing processes or medical settings.

Calibration Process:
The basic steps usually involve:
  • Comparing the thermometer's reading to a known reference temperature, such as the melting point of ice or the boiling point of water.
  • Adjusting the instrument if there is any deviation from the expected reading.
  • Periodic recalibration to account for any wear and tear that might affect accuracy over time.
Through proper calibration, thermometers can provide accurate readings, essential for experiments, culinary tasks, and environmental monitoring.
mathematical equations in physics
Mathematical equations are the backbone of physics, articulating physical laws and concepts in a precise and computational form. They provide a framework for analyzing real-world phenomena, predicting outcomes, and solving practical problems.

The Role of Equations:
  • Equations simplify complex relationships into manageable forms.
  • They link multiple variables, allowing exploration of "what if" scenarios by adjusting these parameters.
  • Facilitate the conversion of theoretical ideas into quantifiable expressions that can be tested and verified through experiments.

Solving Physics Problems:
When faced with a physics problem, breaking it down using equations is critical:
  • Identify known and unknown quantities, often given in the problem statement.
  • Select the appropriate equation or set of equations that capture the relevant physical principles.
  • Solve algebraically, step by step, ensuring dimensional consistency and calculation accuracy.
Physics equations, like the ones used for temperature conversion, make it feasible to move seamlessly between theoretical understanding and practical application, highlighting the elegance and utility of mathematics in science.

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Most popular questions from this chapter

a) Suppose a bimetallic strip is constructed of copper and steel strips of thickness \(1.0 \mathrm{~mm}\) and length \(25 \mathrm{~mm},\) and the temperature of the strip is reduced by \(5.0 \mathrm{~K}\). Determine the radius of curvature of the cooled strip (the radius of curvature of the interface between the two strips). b) If the strip is \(25 \mathrm{~mm}\) long, how far is the maximum deviation of the strip from the straight orientation?

You are designing a precision mercury thermometer based on the thermal expansion of mercury \(\left(\beta=1.8 \cdot 10^{-4}{ }^{\circ} \mathrm{C}^{-1}\right)\) which causes the mercury to expand up a thin capillary as the temperature increases. The equation for the change in volume of the mercury as a function of temperature is \(\Delta V=\beta V_{0} \Delta T\) where \(V_{0}\) is the initial volume of the mercury and \(\Delta V\) is the change in volume due to a change in temperature, \(\Delta T .\) In response to a temperature change of \(1.0^{\circ} \mathrm{C}\), the column of mercury in your precision thermometer should move a distance \(D=1.0 \mathrm{~cm}\) up a cylindrical capillary of radius \(r=0.10 \mathrm{~mm} .\) Determine the initial volume of mercury that allows this change. Then find the radius of a spherical bulb that contains this volume of mercury.

The solar corona has a temperature of about \(1 \cdot 10^{6} \mathrm{~K}\). However, a spaceship flying in the corona will not be burned up. Why is this?

On a cool morning, with the temperature at \(15.0^{\circ} \mathrm{C}\), a painter fills a 5.00 -gal aluminum container to the brim with turpentine. When the temperature reaches \(27.0^{\circ} \mathrm{C}\), how much fluid spills out of the container? The volume expansion coefficient for this brand of turpentine is \(9.00 \cdot 10^{-4}{ }^{\circ} \mathrm{C}^{-1}\).

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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