Kilograms.
A really obese human.
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The mechanical power of the human heart is ~1.3 watts. It takes a much higher rate of energy turnover (~13 watts) to provide this mechanical power, since the mechanical efficiency of the heart is very low (less than 10%).
The reason you're having trouble with this question is that you've allowed yourself to be dazzled by the appearance of "rectangle" and "circle" in it, and the instinctive human fear of geometry has clouded your vision. Forget about 'rectangle' and 'circle'. The question is simply saying: 100 mm2 of paper or foil or sheet-metal weighs 7 grams. How much does 3,520,000 mm2 of it weigh ? Can you do it now ? You could use a proportion: 3,520,000/W = 100/7 . Or you could say to yourself: If 100 weighs 7, then each mm2 weighs 7/100, and 3,520,000 of them must weigh [ (3,520,000) times (7/100) ]. The answer falls right out, and you don't have to know a thing about rectangles or circles. You'll also discover that your rectangle weighs more than 540 pounds !
the weight of the human heart is 300 gram in adult males and 250 grams in adult females
A cow heart typically weighs around 2.2-4.4 pounds and is roughly the size of a large grapefruit.
Less than pound. 11 ounces ===================== A man's heart weighs 10 to 12 ounces. A woman's heart weighs 8 to 10 ounces. ===================== The weight of the average human heart is 10-12 ounces for a male and 8-10 ounces for a female. The weight increases with age and is especially noticeable in males.
An adult (healthy) human heart weighs between 250 and 350 grams (one half - to - three quarters of a pound). The heart weight usually gets larger with increased body weight/fat, and/or various types of heart damage.
The human heart weighs anywhere from 0.551155 pounds to 0.771617 pounds.
heart brain liver kidney
The human spinal cord typically weighs about 35-40 grams.
The mass of an adult human brain is approximately 1300 to 1400 grams (2.87 to 3.1 pounds). A newborn human brain is about 350 to 400 grams (0.77 to 0.88 pounds). The average Male's brain weighs 1360 grams (3 pounds) The average Female's brain weighs 1250 grams (2.8 pounds) The brain weights of some well known people: The brain of Albert Einstein weighed 1230 grams (2.71 pounds) The brain of the German mathematician Carl Friedrich Gauss weighed 1492 grams (3.29 pounds) The brain of the leading poet of Russian Revolution Vladimir Vladimirovich Mayakovsky weighed 1700 grams (3.75 pounds)
The average Human Male's brain weighs 1360 grams (3 pounds)
The average male brain weighs about 3.5 lbs (1600 grams)
The average healthy adult human heart weighs between 1/2 to 3/4 of a pound. A diseased heart can weigh up to two pounds.
The mass of an adult human brain is approximately 1300 to 1400 grams (2.87 to 3.1 pounds).A newborn human brain is about 350 to 400 grams (0.77 to 0.88 pounds).The average Male's brain weighs 1360 grams (3 pounds)The average Female's brain weighs 1250 grams (2.8 pounds)The brain weights of some well known people:The brain of Albert Einstein weighed 1230 grams (2.71 pounds)The brain of the German mathematician Carl Friedrich Gauss weighed 1492 grams (3.29 pounds)The brain of the leading poet of Russian Revolution Vladimir Vladimirovich Mayakovsky weighed 1700 grams (3.75 pounds)The brain weights 5lbs.