How much plant energy (kilograms of plant) will it take to feed the beef that gets you to 20 years old?

What is in box 3 and 4 Which of the product is being used to make bread specifically?

Humans convert approximately ______ of the energy stored in food to useful work.     99.9%     34%     22%     55%

We should all know that a calorie is the measure of energy required to raise 1 g of water by 1°C. We all know that energy off our food is measured in Calories and that to lose weight we just need to use more than we take in. So how come this isn't a good strategy for weight loss: drink cold water. For every degree you heat up each gram, you'll burn a calorie. If a pound of fat is 3500 Calories, just drink 3500 g of water (3.5 liters) and for every degree it gets warmer in the stomach, you lose a pound.  ?