10. The hottest stars in the sky are A about 200,000°c B about 5,800°c C about 22.000.
2 answers:
You might be interested in
Answer:
Procedure (2)
Explanation:
Assume the dialyses come to equilibrium in the allotted times.
Procedure (1)
If you are dialyzing 5 mL of sample against 4 L of water, the concentration of NaCl will be decreased by a factor of
Procedure (2)
For the first dialysis, the factor is
After a second dialysis, the original concentration of NaCl will be reduced by a factor of
Procedure (2) is more efficient by a factor of
Answer:
Explanation:
You will need to use the conversion between food calories, calories and joules.
From a nutritional table (from the internet) you can obtain the amount of nutritional calories for each type macronutrient:<em> carbohydrates, protein, and fat.</em>
Macronutrient food calories
Carbohydrate 4 cal/g
Protein 4 cal/g
Fat 9 cal/g
To convert food calories to regular calories, mutiply by the conversion factor:
Macronutrient calories
Carbohydrate 4,000 cal/g
Protein 4,000 cal/g
Fat 9,000 cal/g
To convert regular calories to joules, multiply by the conversion factor:
Macronutrient energy in joules
Carbohydrate 16,736 joule/g
Protein 16,736 joule/g
Fat 37,656 joule/g
Now you can multiply the grams of each macronutrient in one potato by its energy content:
Macronutrient energy/gram × grams = total energy
Carbohydrate 16,736 joule/g × 37 g = 619,232 joules
Protein 16,736 joule/g × 4.3 g = 71,968.8 joules
Fat 37,656 joule/g × 4 g = 150,624 joules
Total = 619,232 joules + 71,968.8 joules + 150,624 joules = 841,820.8 joules.
Since they are <u>two potatoes</u>, multiply by 2: × 841,820.8 joules = 1,683,641.6 joules.
Divide by 1,000 to convert to kilojoules = 1,683.64 kilojoules
Divide the total energy from the two potatoes by the <em>energy that an average person expend per hour of walking (845 kilojoules of energy per hour):</em>