A human being needs approximately 12 kilocalories of food energy per pound of bodyweight in order to sustain life for a day. The planetwide average bodyweight of a human is about 140 pounds. The total human population of the planet can be estimated as 7.5×109 people. Estimate the number of kilocalories of food energy required each day by the entire human population, being sure to express answer with appropriate precision.

DIRECTIONS for the question: Read the passage and answer the question based on it.Until a hundred years ago as humans we had a simple, uncomplicated biological connect. It was a straightforward equation: we drew roughly 3,000 calories each of energy out of the Earth for our food and life's sustenance. Today that number per capita has grown to 1,00,000 calories. We still need only 3,000 calories each to nourish life itself. All the rest of this energy is what we extract from the Earth for everything else besides keeping ourselves alive. In some countries, like the US; this per capita number runs at over 2,00,000 calories. Some of us are concerned about this. We fret over what we could - and should - really be doing to soften this abuse of resources. Little things fox us in the welter of things that we get to read. What is sustainable development? How can it be started at our homes? Beyond the ceremonial planting of green and getting people to run marathons of various lengths in support of the environment, is there more that we can add to the abstract value of 'sustainability'? What are the little things we can do in our day-to-day lives, to reduce demand for things that people make and market? Of course, we know that it helps to avoid a plastic bag when you can use a newspaper bag, or a brown bag, or even a jute bag which you can use for many more years unlike a plastic bag which you throw away in less than a week or after a few uses. However, there's actually quite a bit more that you and I can do, without compromise on comfort, with very little as cost incurred, with financial savings that you can gain on energy and water use, and with solutions that are very feasible and within your reach. It is possible to understand our ecological footprint and its disastrous consequences, not merely in terms of our own behaviour as consumers, but really in terms of the impact on the environment we make.A suitable title to the passage could be Lets Shift to Jute! How to Consume Few Calories? Save Energy, Save the Earth! The Earth Heading for a Disaster

The given table shows estimated energy requirements (in kilocalories) according to age,gender and activity.Gender Age (years) Activity LevelSedentary Moderately Active ActiveMale4-8 1,400 (kcal) 1,400-1,600 (kcal) 1,600-2,000 (kcal)31-50 2,200 (kcal) 2,400-2,600 (kcal) 2,800-3,000 (kcal)The information in the given table implies thatA. the energy requirement of all males is the same.B. adult males need to do more work than children.C. children need to burn more calories than adult males.D. adult males should take more carbohydrates than children

Read the text and choose the correct answer.It's important for people to eat as much as they need to give them (22) _______ . If they eat too little food or the wrong food, they won't have enough energy. If they eat too much, they will need to exercise more; otherwise, they will put (23) ______ weight.Some foods such as fish and chicken meat have a high amount of protein. Our bodies need protein to grow and (24) _______ taller and stronger.Some types of food are rich in carbohydrates, like bread, potatoes and rice that provide us with energy to work and play.Other types of food are (25) ______ of fat like cakes and sweets. Our bodies do need a little amount of fat but too much of it is not good.Fresh fruit and vegetables are full of vitamins and minerals that are very (26) ______ for the growth of our bodies and to keep ourselves active and running.Energy balance is the one that contains the right amounts of each type of food.Question 22:energymoneyhealthbalanceQuestion 23:downtoonatQuestion 24:keepsoundbecomemakeQuestion 25:fullenoughemptylack

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

In different countries, the energy contribution of a food may be listed as kilocalories or kilojoules.Group of answer choicesTrueFalse