Ajeweler is heating a gold bar. it takes 7 joules of heat to raise the temperature of the bar 1°c. the initial temperature of the bar is 25°c. how many joules of heat would be required to raise the temperature of the gold bar to 26°c, 27°c, 28°c, 29°c, 30°c, and 35°c?

We are given that it takes 7 joules of heat to raise the temperature of the bar by 1°C. Therefore this means that the heating capacity Cp is:

Cp = 7 J / °C

The formula for the amount of heat required is:

heat = Cp (Tf – Ti)

where Ti is initial temperature = 25°C, and Tf is the final temperature

When Tf = 26°C

heat = 7 (26 – 25) = 7 J

When Tf = 27°C

heat = 7 (27 – 25) = 14 J

When Tf = 28°C

heat = 7 (28 – 25) = 21 J

When Tf = 29°C

heat = 7 (29 – 25) = 28 J

When Tf = 30°C

heat = 7 (30 – 25) = 35 J

When Tf = 35°C

heat = 7 (35 – 25) = 70 J

7 weeks

step-by-step explanation:

convert each fraction to the least common multiple of 20, so 3/4 = 15/20 & 1/10 = 2/20, then divide 15 by 2 and you get a little over 7, so the food will last 7 weeks.

did you get the answer yet?

step-by-step explanation: