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When heat energy $Q$ causes a change in temperature $\Delta T=T_f-T_i$ in a sample with specific heat capacity $c$ and mass $m$, then we can relate all these physical quantities as following formula \[Q=mc\Delta T=mc(T_f-T_i)\] where $T_f$ and $T_i$ are the initial and final temperatures.
Solved Examples for Heat Index Formula. Q.1: Calculate the HI for a temperature of 85 °C and 86%. Use Heat Index Formula. Solution: Given: First, covert 85 °C by using formula F= \frac {9} {5}C + 32 gives 185 °F. R = 86% By using formula of heat index we get.
18 Ιουλ 2024 · Use the Heat Index Formula: HI = c₁ + c₂T + c₃R + c₄TR + c₅T² + c₆R² + c₇T²R + c₈TR² + c₉T²R² to find perceived warmth. What is a Normal Heat Index? A normal heat index ranges from 80°F to 90°F, indicating comfortable to slightly uncomfortable conditions.
Observe heat transfer and change in temperature and mass. Calculate final temperature after heat transfer between two objects.
The temperature of an object can be measured using a thermometer which is based on a suitable thermometric property. (i) What is heat? (ii) What is meant by temperature? (iii)Give an example of a thermometric property. (iv) The SI unit of temperature is the kelvin. Give another temperature scale.
9 Ιαν 2021 · Solution: Initial and final temperatures are $T_i=50.4^\circ$ and $T_f=25^\circ$, respectively. Applying the specific heat equation and substituting the numerical values, we get \begin {align*} c&=\frac {Q} {m\Delta T}\\ \\&=\frac {47\, {\rm cal}} {1\, {\rm g} (50.4-25)}\\ \\ &=1.850\quad {\rm cal/g\cdot K}\end {align*}
Both scales start at 0 ° ° for freezing, so we can create a simple formula to convert between temperatures on the two scales.
