Why Doesn't the Earth Rotate Beneath Us When We Jump?


If the Earth is rotating at a high speed and we jump up, why doesn't the Earth move below us at high speed?

Robert Frost:

You are coupled to the reference frame of the Earth. While on the surface, your velocity relative to the Earth is zero. If you start to levitate above the ground, you are still attached to the reference frame of the Earth and will hover over the same spot on the ground.

It's no different than riding in an airplane, standing in the aisle, jumping in the air and assuming that you'll stop traveling at the 550 mph the airplane is flying.

If you want to separate yourself from the Earth's reference frame, you would have to decelerate yourself by about 1000 miles per hour (at the equator) and you would have to compensate for the forces that come from the atmosphere slamming into you at 1000 miles per hour (the atmosphere is also attached to the Earth's reference frame). This would take a lot of energy.

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Take Advantage of Amazon's Early Black Friday Deals on Tech, Kitchen Appliances, and More

Amazon
Amazon

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links.

Even though Black Friday is still a few days away, Amazon is offering early deals on kitchen appliances, tech, video games, and plenty more. We will keep updating this page as sales come in, but for now, here are the best Amazon Black Friday sales to check out.

Kitchen

Instant Pot/Amazon

- Instant Pot Duo Plus 9-in-115 Quart Electric Pressure Cooker; $90 (save $40) 

- Le Creuset Enameled Cast Iron Signature Sauteuse 3.5 Quarts; $180 (save $120)

- KitchenAid KSMSFTA Sifter with Scale Attachment; $95 (save $75) 

- Keurig K-Mini Coffee Maker; $60 (save $20)

- Cuisinart Bread Maker; $88 (save $97)

- Anova Culinary Sous Vide Precision Cooker; $139 (save $60)

- Aicook Juicer Machine; $35 (save $15)

- JoyJolt Double Wall Insulated Espresso Mugs - Set of Two; $14 (save $10) 

- Longzon Silicone Stretch Lids - Set of 14; $13 (save $14)

HadinEEon Milk Frother; $37 (save $33)

Home Appliances

Roomba/Amazon

- iRobot Roomba 675 Robot Vacuum with Wi-Fi Connectivity; $179 (save $101)

- Fairywill Electric Toothbrush with Four Brush Heads; $19 (save $9)

- ASAKUKI 500ml Premium Essential Oil Diffuser; $22 (save $4)

- Facebook Portal Smart Video Calling 10 inch Touch Screen Display with Alexa; $129 (save $50)

- Bissell air320 Smart Air Purifier with HEPA and Carbon Filters; $280 (save $50)

Oscillating Quiet Cooling Fan Tower; $59 (save $31) 

TaoTronics PTC 1500W Fast Quiet Heating Ceramic Tower; $55 (save $10)

Vitamix 068051 FoodCycler 2 Liter Capacity; $300 (save $100)

AmazonBasics 8-Sheet Home Office Shredder; $33 (save $7)

Ring Video Doorbell; $70 (save $30) 

Video games

Nintendo

- Legend of Zelda Link's Awakening for Nintendo Switch; $40 (save $20)

- Marvel's Spider-Man: Game of The Year Edition for PlayStation 4; $20 (save $20)

- Marvel's Avengers; $27 (save $33)

- Minecraft Dungeons Hero Edition for Nintendo Switch; $20 (save $10)

- The Last of Us Part II for PlayStation 4; $30 (save $30)

- LEGO Harry Potter: Collection; $15 (save $15)

- Ghost of Tsushima; $40 (save $20)

BioShock: The Collection; $20 (save $30)

The Sims 4; $20 (save $20)

God of War for PlayStation 4; $10 (save $10)

Days Gone for PlayStation 4; $20 (save $6)

Luigi's Mansion 3 for Nintendo Switch; $40 (save $20)

Computers and tablets

Microsoft/Amazon

- Apple MacBook Air 13 inches with 256 GB; $899 (save $100)

- New Apple MacBook Pro 16 inches with 512 GB; $2149 (save $250) 

- Samsung Chromebook 4 Chrome OS 11.6 inches with 32 GB; $210 (save $20) 

- Microsoft Surface Laptop 3 with 13.5 inch Touch-Screen; $1200 (save $400)

- Lenovo ThinkPad T490 Laptop; $889 (save $111)

- Amazon Fire HD 10 Tablet (64GB); $120 (save $70)

- Amazon Fire HD 10 Kids Edition Tablet (32 GB); $130 (save $70)

- Samsung Galaxy Tab A 8 inches with 32 GB; $100 (save $50)

Apple iPad Mini (64 GB); $379 (save $20)

- Apple iMac 27 inches with 256 GB; $1649 (save $150)

- Vankyo MatrixPad S2 Tablet; $120 (save $10)

Tech, gadgets, and TVs

Apple/Amazon

- Apple Watch Series 3 with GPS; $179 (save $20) 

- SAMSUNG 75-inch Class Crystal 4K Smart TV; $998 (save $200)

- Apple AirPods Pro; $199 (save $50)

- Nixplay 2K Smart Digital Picture Frame 9.7 Inch Silver; $238 (save $92)

- All-New Amazon Echo Dot with Clock and Alexa (4th Gen); $39 (save $21)

- MACTREM LED Ring Light 6" with Tripod Stand; $16 (save $3)

- Anker Soundcore Upgraded Bluetooth Speaker; $22 (save $8)

- Amazon Fire TV Stick with Alexa Voice Remote; $28 (save $12)

Canon EOS M50 Mirrorless Camera with EF-M 15-45mm Lens; $549 (save $100)

DR. J Professional HI-04 Mini Projector; $93 (save $37)

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Why Is My Turkey Wearing Frilly Paper Hats On Its Legs?

All dressed up and nowhere to go.
All dressed up and nowhere to go.
Matt Cottam via Flickr // CC BY-NC-ND 2.0

Donning a chef’s hat while you cook Thanksgiving dinner is one thing, but sticking a tiny one on the end of each crispy turkey leg seems like it might be taking the holiday a bit too far.

Over the years, these traditional paper coverings have been called many creative names, including turkey frills, turkey booties, and even turkey panties. And while they’ve fallen out of fashion in recent decades, they originally served a very specific purpose. According to 19th-century writer John Cordy Jeaffreson, paper trimmings gained popularity in the 17th century as a way for women to keep their hands clean while they carved meat.

“To preserve the cleanness of her fingers, the same covering was put on those parts of joints which the carver usually touched with the left hand, whilst the right made play with the shining blade,” he explained in A Book About the Table in 1875. “The paper-frill which may still be seen round the bony point and small end of a leg of mutton, is a memorial of the fashion in which joints were dressed for the dainty hands of lady-carvers, in time prior to the introduction of the carving-fork.”

When etiquette books started encouraging "lady-carvers" to use carving forks, the paper didn’t become obsolete—it just got frillier. During the 19th and 20th centuries, chop frills were a cute and classy way to conceal the unsightly leg bones of roast turkey, lamb, chicken, or any other bird. “Dress up any leggy food with them for parties or the children’s birthdays,” Iowa’s Kossuth County Advance wrote in 1951. “They will be thrilled.”

If you’d like to dress up a leggy food or two this Thanksgiving, here are some instructions for making your own chop frills, courtesy of HuffPost.

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