Raul is performing an experiment. He pours water into a glass and measures the temperature of the water at 72.3 degrees Fahrenheit. Then he adds a few ice cubes to the glass of water. He measures the temperature of the water again and finds that it changed by -39.1°F.

Write an expression that represents the temperature of the water after Raul added the ice cubes. Write the expression as the sum of two numbers.

A. 72.3 + (-39.1)
B. 72.3 - 39.1
C. -39.1 + 72.3
D. 39.1 - 72.3

Question

17-02-2024
Physics

High School

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Raul is performing an experiment. He pours water into a glass and measures the temperature of the water at 72.3 degrees Fahrenheit. Then he adds a few ice cubes to the glass of water. He measures the temperature of the water again and finds that it changed by -39.1°F.

Write an expression that represents the temperature of the water after Raul added the ice cubes. Write the expression as the sum of two numbers.

A. 72.3 + (-39.1)
B. 72.3 - 39.1
C. -39.1 + 72.3
D. 39.1 - 72.3

Answer :

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AkhilSachdeva AkhilSachdeva · Answer 1 · 2024-01-25T19:30:58-05:00

Final answer:

The correct expression to represent the temperature of the water after adding ice cubes to water initially at 72.3°F, with a temperature change of -39.1°F, is either 72.3 + (-39.1) or 72.3 - 39.1. Option A,B are correct.

Explanation:

Raul is conducting an experiment where he first measures the temperature of water and then measures it again after adding ice cubes. To represent the temperature of the water after adding the ice cubes, an expression is needed that accounts for the initial temperature and the change in temperature.

The initial temperature of the water is measured at 72.3 degrees Fahrenheit. After adding ice cubes, the temperature changes by -39.1 degrees Fahrenheit. To find the new temperature, we subtract 39.1 from 72.3, because the temperature decreased. Therefore, the correct expression is:

a. 72.3 + (-39.1) or equivalently,

b. 72.3 - 39.1

Both expressions will yield the same result, which is the temperature of the water after adding the ice cubes.