At what temperature the centigrade (celsius) and Fahrenheit readings at the same. \((\mathrm{A})-40^{\circ}\) (B) \(+40^{\circ} \mathrm{C}\) (C) \(36.6^{\circ}\) (D) \(-37^{\circ} \mathrm{C}\)

Short Answer

Expert verified
The temperature at which the Celsius and Fahrenheit readings are the same is \(-40^{\circ}\).

Step by step solution

01

Conversion formula

The formula to convert a Celsius temperature to Fahrenheit is \(F = \frac{9}{5}C + 32\) where F is the temperature in Fahrenheit, and C is the temperature in Celsius. #Step 2: Set the Celsius and Fahrenheit temperatures equal to each other#
02

Setting the temperatures equal

We are asked to find the temperature at which the Celsius and Fahrenheit readings are the same. So, we need to find the value of \(C\), the Celsius temperature, so that \(C=F\) Therefore, we will substitute the conversion formula into the equation: \(C = \frac{9}{5}C + 32\) #Step 3: Solve the equation for the Celsius temperature#
03

Solving the equation

To solve the equation, we first need to get the same denominator for both terms: \(5C = 9C + 160\) Then we will subtract \(9C\) from both sides of the equation: \(-4C = 160\) Finally, we will divide both sides by \(-4\): \(C = -40\) #Step 4: Check the solution in the options given#
04

Checking the solution

We found that the Celsius temperature at which the Celsius and Fahrenheit readings are the same is: \(C = -40^{\circ}\) Now, we need to check the options given: (A) \(-40^{\circ}\) (Correct) (B) \(+40^{\circ} \mathrm{C}\) (Not correct) (C) \(36.6^{\circ}\) (Not correct) (D) \(-37^{\circ} \mathrm{C}\) (Not correct) The answer is (A), \(-40^{\circ}\).

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