Feeds

It’s official: Google shrinks the world!

To the size of a London bus, roughly

Bridging the IT gap between rising business demands and ageing tools

An anonymous reader has pointed us to this slip in Google Calculator: someone – or something – picked the wrong units for Earth’s escape velocity.

If you ask Google – using the search term "Earth Escape Velocity" – and you’ll get the result in the shot below.

Is that a comma or a decimal? Google's response to a search for

Earth's escape velocity

El Reg has confirmed the result for ourselves.

It’s very nearly almost right, except for the pesky presence of the letter “k”, as in “kilometres per second”. Actually, the correct value for Earth’s escape velocity is 11,190 (with a little rounding) meters per second.

Wikipedia gets the value right, here, or if you want a more authoritative source, there’s NASA, here.

The Register just hopes that no cramming first-year university students – or last-year high school students – rely on this value in their studies, because, as our correspondent pointed out, it leads to some humorous outcomes.

The equation for calculating escape velocity takes us back to Newton: it’s the square root of (2*G*M/r), where G is the gravitational constant, M is the mass of the Earth, and r is the radius.

Asked to work it out from scratch, and Google is quite happy and accurate. If you want to prove it, put in sqrt((2 * gravitational constant * mass of Earth) / radius of Earth) and see what happens.

sqrt((2 * gravitational constant * mass of Earth) / radius of Earth) = 11 178.8391 m /s

Orl Korrect, as they might say …

If, however, you reverse Google’s original 11,190 km/sec, you’ll get quite a different result for the radius of Earth:

(2 * gravitational constant * mass of Earth) / ((11 190 (km / s))^2) = 6.36538334 metres

Earth's radius, calculated for Google's stated escape velocity

…a radius roughly the length of a London bus (in classic Register units).

Which is a pity, because that leaves us only a couple of alternatives. Either there are some students out there in grave danger of mucking up an assignment or exam; or we ran out of space a long time ago. Reversing the equation to calculate Earth’s mass is even more amusing. As our correspondent noted:

“The calculated earth mass based on Google's escape velocity value would be 1,000,000 times greater than the actual Earth mass - and the human race would likely be a puddle on the earth surface due to the surface gravity being 1000000g”.

A couple of attempts have been made to draw Google’s attention to the error, here and here for example.

The poster of the latter of these links wonders if it’s a localisation error – putting a European comma in place of the decimal point used in America, Australia and the UK. That might, indeed, make sense – since the same unit error occurs if you ask Google the escape velocity of the Sun. Google presents 617,700 km/s as the solar escape velocity, rather than 617.7 km/s. ®

Bootnote

Fire up the standards converter for the altogether more accurate El Reg official units of measurement. Still not sure how they work? Check out our instructional video.

Mobile application security vulnerability report

More from The Register

next story
Malaysian Airlines flight MH17 claimed lives of HIV/AIDS cure scientists
Researchers, advocates, health workers among those on shot-down plane
Mwa-ha-ha-ha! Eccentric billionaire Musk gets his PRIVATE SPACEPORT
In the Lone Star State, perhaps appropriately enough
The Sun took a day off last week and made NO sunspots
Someone needs to get that lazy star cooking again before things get cold around here
All those new '5G standards'? Here's the science they rely on
Radio professor tells us how wireless will get faster in the real world
Diary note: Pluto's close-up is a year from … now!
New Horizons is less than a year from the dwarf planet
Boffins discuss AI space program at hush-hush IARPA confab
IBM, MIT, plenty of others invited to fill Uncle Sam's spy toolchest, but where's Google?
prev story

Whitepapers

Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
How modern custom applications can spur business growth
Learn how to create, deploy and manage custom applications without consuming or expanding the need for scarce, expensive IT resources.
Reducing security risks from open source software
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Consolidation: the foundation for IT and business transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.