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ivolga24 [154]
3 years ago
12

A loaf of bread is removed from an oven and is left sitting in the kitchen to cool. Its temperature t minutes after being remove

d from the oven is given by the equation T(t) = 103e-0.0182t73. Find the temperature of the kitchen (assuming the temperature remains constant), the initial temperature of the bread when it is removed from the oven, and the temperature of the loaf of bread after 90 minutes.
Physics
1 answer:
Darya [45]3 years ago
8 0
<h2>Answer:</h2>

<em><u>(a). 73° C. </u></em>

<em><u>(b). 176° C.</u></em>

<em><u>(c). 93.02°C.</u></em>

<h2>Explanation:</h2>

In the question,

We have been given an equation,

T(t) = 103e^{-0.0182t}+73.

(a).

We need to find the temperature of the kitchen,

So,

Time, t → ∞

On putting the value of t as infinite in the equation we get,

T(\infty)=103e^{-0.0182*\infty}+73\\T(\infty)=103*0+73\\T(\infty)=0+73\\T(\infty)=73\\

<em><u>Therefore, the temperature of the Kitchen is 73° C. </u></em>

(b).

The initial temperature of the bread when it is removed from the oven is at, t = 0 s

So,

On putting the value of t = 0, we get,

T(t) = 103e^{-0.0182t}+73.\\T(0)=103e^{-0.0182\times 0} + 73\\T(0)=103+73\\T(0)=176

<em><u>Therefore, the initial temperature of the bread is 176° C.</u></em>

(c).

On putting the value of t = 90 minutes, we get,

T(t) = 103e^{-0.0182t}+73.\\T(90)=103e^{-0.0182\times 90} + 73\\T(90)=20.0199+73\\T(90)=93.02

<em><u>Therefore, the temperature of the bread after 90 minutes is 93.02°C.</u></em>

<em><u></u></em>

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Answer:

\huge{ \boxed{ \bold{ \sf{77 \: m/s}}}}

☯ Question :

  • How fast is a wave travelling if it has a wavelength of 7 meters and a frequency of 11 Hz?

☯ \underbrace{ \sf{Required \: Answer  :  }}

☥ Given :

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➺ \sf{v = 11 \times 7}

➺ \boxed{ \sf{v = 77 \: m/s}}

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✑ Additional Info :

  • Frequency : The number of complete vibrations made by a particle of a body in one second is called it's frequency. It is denoted by the letter f . The SI unit of frequency is hertz ( Hz ).

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