There are lots of people, however the oceans are very giant. Rosley Majid / EyeEm through Getty Photos Curious Children is a sequence for kids of all ages. When you’ve got a query you need an knowledgeable to reply, ship it to CuriousKidsUS@theconversation.com. If everybody on Earth sat within the ocean, how far would the water go? – Zahkaev and Viktor Hypothetical questions, similar to what would occur if everybody on Earth went swimming within the ocean without delay, are enjoyable to consider. And by utilizing math, you will get nearer to an actual reply. Let’s begin by contemplating a smaller model of the identical query. Bathtub Math Should you fill a bathtub to the highest and leap in, you recognize you are able to do a soggy clear. Water overflows as a result of your physique pushes it out of the best way – that is referred to as displacement. Because the tub has a stable backside and sides, the one path the water can go is up and down. The quantity of house that an object – on this case, you – takes up known as quantity. The quantity of water overflowing from the bathtub is the same as the amount of your physique. Now consider a scenario the place the bathtub is just half full. As you stroll in, the amount of your physique at all times pushes the water upwards. You’ll be able to calculate how a lot the water degree within the tub will enhance with a couple of basic math equations. Suppose the bathtub is an oblong field. You’ll be able to decide how a lot the water degree will rise whenever you sit within the tub by contemplating how a lot quantity you add to the bathtub and the scale of the realm you unfold that quantity over. The rise in water degree is the same as the added quantity divided by the realm. For a 5 foot lengthy and a pair of foot huge tub, the realm is 10 sq. toes. Now let’s calculate your quantity. For ease of calculation, let’s assume that you just, like the bathtub, are additionally an oblong field. To illustrate you’re about 4 toes tall and a pair of toes huge (left to proper) and 1 foot deep (entrance to again). Your physique quantity could be 4 toes x 2 toes x 1 foot, or 8 cubic toes. While you sit down, you add about half of your physique quantity to the bathtub. Which means that the peak of the water degree rise is the same as the amount of half your physique divided by the realm of the bathtub. Utilizing the estimates above, this results in a water degree rise of 4 cubic toes divided by 10 sq. toes, which equates to roughly 5 inches. You’ll positively discover this! Earth known as the “blue planet” as a result of its most placing function is water, in liquid and frozen type. Elen11 / iStock through Getty Photos Scaling You’ll be able to consider the oceans as a big bathtub. Over 70% of the Earth’s floor is the ocean, giving this tub an space of roughly 140 million sq. miles. To find out how a lot the water goes to rise, we have to know the amount of individuals sitting and divide it by this ocean space. At the moment, there are virtually 8 billion individuals on Earth. Human beings are available all sizes, from small infants to giant adults. Suppose the common peak is 5 toes tall – slightly taller than a toddler – with a median quantity of 10 cubic toes. Solely half of every particular person’s physique could be submerged when sitting down, so solely 5 cubic toes provides to the water degree. With 8 billion individuals in whole, you may calculate 5 x 8 billion, which is a whopping 40 billion cubic toes that will be added to the oceans. However bear in mind, this quantity could be unfold over the huge space of the oceans. Utilizing the identical bathtub calculations as earlier than, we divide the 40 billion cubic toes of quantity over the 140 million sq. miles of ocean. The reply? The full sea degree rise could be about 0.00012 of an inch, or lower than 1 / one thousandth of an inch. If everybody submerged utterly, that will double the response to 0.00024 inches, which remains to be solely the width of a human hair. It seems the oceans are big – and people are only a drop within the bucket. Whats up curious youngsters! Have a query you want to an knowledgeable to reply? Ask an grownup to ship your query to CuriousKidsUS@theconversation.com. Please inform us your identify, age and metropolis the place you reside. And since curiosity has no age restrict – adults, additionally inform us what you’re questioning. We can’t be capable of reply the entire questions, however we’ll do our greatest. This text is republished from The Dialog, a non-profit information web site devoted to sharing concepts from tutorial consultants. It was written by: Tony E. Wong, Rochester Institute of Know-how. Learn extra: Is playing good for teenagers? Mermaids Aren’t Actual – However They Have Fascinated Folks Across the World For Ages Tony E. Wong doesn’t work, seek the advice of, personal shares, or obtain funding to learn from this text, and didn’t disclose any related affiliation past their tutorial appointment.