A food scientist breaks down the thermodynamics between marshmallows and hot chocolate

https://www.popsci.com/story/science/hot-chocolate-cocoa-marshmallows-physics/

Marshmallows should reduce the temperature of hot chocolate, but there are other factors involved, too.

Marshmallows should reduce the temperature of hot chocolate, but there are other factors involved, too.

Hot chocolate is simply incomplete without marshmallows. As the plump white globs melt to form a puffy blanket, it’s easy to take for granted the molecular phenomena occurring inside as you sip on the delicious beverage. A key component to the tasty treat is its temperature: too hot and it burns your tongue, too lukewarm and it loses its cozy-feel. A worthwhile scientific inquiry then is whether the marshmallows act as a cooling agent or, rather, keep the hot chocolate hot.

“I’d guess that the marshmallow would reduce the temperature of the hot chocolate,” says Chris Loss, a food scientist and lecturer at Cornell University.

Temperature is essentially a measure of energy, Loss says. Fast-moving molecules produce more energy and therefore raise the temperature of whatever entity they are in.

According to the laws of thermodynamics, energy flows from high to low concentrations. In the marshmallow-hot chocolate scenario, the hot chocolate’s high energy likely moves to the lower-energy marshmallows.

The hot chocolate’s energy seeps into the marshmallows and “jiggles” the sugar and protein molecules. That’s when the molecules separate and the marshmallows turn into those blankets of goo and dissolve into the drink. As it dissolves, it likely lowers the hot chocolate’s energy and thus its temperature. The process continues until the energy between the two reaches an equilibrium.

The marshmallows aren’t the only element slowing things down; the properties of the hot chocolate itself factor in as well. The dissolving sugars and proteins block the water molecules, he says, which could slow down molecular movement and further decrease the liquid temperature.

There might be other factors at play, however. Loss says kitchen air produces an “evaporative cooling” effect as water is freed from the drink’s surface and into the atmosphere. Since they’re filled with air, the marshmallows could insulate the hot chocolate by slowing down this cooling.

To decelerate this cooling process, some chefs insulate meat from kitchen air with a vacuumed sous vide in a precisely heated water bath. To ensure the proper temperature of the bath is maintained, Loss has floated ping pong balls over the water’s entire surface to maximize the effect.

All together, a number of factors could influence this heat transfer, like the quantity and size of the marshmallows, along with the cup’s circumference. If marshmallows do indeed cool hot chocolate, Loss says he’s interested in learning the specific rate of cooling.

“The real answer to these sorts of questions should be an engaging discussion that is based on facts, drawn from observations,” Loss says.

If you’re up for an experiment, whip up a cup of hot chocolate and measure it with a food-safe thermometer both before and after adding marshmallows. Try to record the temperature at regular intervals and watch how it changes. Tweet us @PopSci with your results!

via Popular Science – New Technology, Science News, The Future Now https://www.popsci.com

January 13, 2020 at 02:36PM

This simulator company reverse-engineered the Tesla Nürburgring lap

https://arstechnica.com/?p=1642763

A picture of the Nurburgring with the Tesla logo overlaid on top.

Last summer, a whole lot more people learned about the world’s gnarliest race track when Tesla announced that it was sending a Model S sedan to the Nürburgring Nordschleife. The 12.9-mile (20.8km) track was built as a make-work project during the Great Depression, and people still race there today, although it’s also widely used by car companies to develop their cars—or ruin them, if you believe that one episode of Top Gear. Tesla has been rather coy about the whole thing and hasn’t really elaborated on the full raft of modifications it made to the Model S that set an unofficial time of 7 minutes and 23 seconds. But that hasn’t stopped our friends at CXC Simulations from having a go at reverse-engineering things in silico.

I spoke to CXC’s boss, Chris Considine, and professional racer (and the only American driver to have won pole position at the Nordschleife) Jeff Westphal to find out the answers to important questions like how, and why, and was it fun?

“I saw the story about Tesla running at the Nürburgring, and then we saw the video of them running it at Laguna Seca as well and we thought ‘what if we tried to simulate this backwards, right?’ Instead of having all the data, and then creating a simulation based on that, what if we just take the lap time and all the information that we know and try and reverse engineer, essentially,” Considine told me.

CXC already had laser-scanned versions of the Nürburgring and Laguna Seca available, but it still needed a (digital) Tesla Model S to drive. “We looked at what we could see from the photos and what we can tell from the video of when they ran it at Laguna Seca. We can build a baseline Tesla from what we know, and then we have some race engineers that we work with here to build that data, and then we can then look at the apex speeds and the entry speed on the video and reverse engineer from there,” Considine explained.

If that sounds like a fair amount of work, it was—about 30 hours to build the 3D model of the car, and another 30 hours on the research and engineering side, according to Considine. He also had a good breakdown of the difference between this kind of sim and the even more expensive sims like the one I tried a couple of years ago at Multimatic in Canada. “We’ve worked with all the way up to Formula One, and the difference is, once you get up to that level with manufacturer involvement, the simulators are no longer drivers sims, they’re engineering sims. They are not meant for the drivers, but it’s a driver in the loop, because they’re the variable for the engineers to work with,” he told me.

Racing driver Jeff Westphal talks us around his lap of the Nürburgring Nordschleife.

Even in the sim, driving an electric vehicle like the Model S was quite different to the race cars inside which Jeff Westphal can more usually be found. “I found the difference very eye-opening. My entire driving career, I’m used to a little bit of engine braking, and used to having gears and using them as an advantage depending on the sequence of the corners that’s coming up. And in this case, you know, you have a different throttle linearity, you have no gears to worry about. You have potentially a lot of wheel spin at low speed, and the car was quite heavy. It’s definitely managing the rolling speed or the inertia, which is a fair bit different than a normal car,” Westphal told me.

In fact, Westphal was in the running to drive the actual Model S in Germany. “It was a funny story; I actually signed an NDA, and I was going to be the driver that did that ‘Ring lap. Somewhere along the way they decided to get someone in Europe to do it, to keep travel costs down. The ironic thing was that they hired one of my teammates that I race with in the Glickenhaus program to do it. So I didn’t get to do it, but someone I know very well did,” he told me.

The sim lap was all CXC’s doing, with no involvement or input from Tesla. But the two companies aren’t exactly strangers. For one thing, Tesla’s design studio is about a 10 minute walk from CXC in Hawthorne, California, as is Base51, a local sim racing center that uses CXC’s rigs. “They do company events [at Base51] all the time, and I think we’ll probably get a lot of requests for them to use those simulators now with that model over at Base 51, because their employees are there quite frequently.”

via Ars Technica https://arstechnica.com

January 13, 2020 at 06:55AM

This Console Modder Has Created GameCube Joy-Cons For Switch

https://www.gamespot.com/articles/this-console-modder-has-created-gamecube-joy-cons-/1100-6472690/

The Switch has a great controller in the Pro Controller, but many gamers (especially fans of Super Smash Bros. Melee) cannot look past the GameCube controller, so much so that Super Smash Bros. Ultimate still supports it. But if you’re playing in handheld mode, you’re out of luck, with no official GameCube controller-shaped Joy-Cons available–which is why one console modder took it upon themselves to build some.

Shank Mods‘ creation was made by tearing down a pair of standard Joy-Cons and recreating them inside the half-shells of a GameCube controller. This is not a theoretical render, but rather a new pair of working Joy-Con controllers that each look and feel like half a GameCube controller.

In the video below, Shank shows how he did it (it took months of work and involved 3D printing some parts,) and how they work.

The process of making the controller is pretty involved, as the Joy-Con pair features different buttons compared to the GameCube controller.

Shank even creates a Joy-Con cradle, so you can use the two halves snapped together like a Wavebird. These Joy-Con controllers he has created are compatible with any games that you can use the Joy-Con with, and feature gyro controls and amiibo support.

Unfortunately, the GameCube Joy-Con is not available as a commercial product.

Now Playing: Super Smash Bros. Ultimate Review

Got a news tip or want to contact us directly? Email news@gamespot.com

via GameSpot’s PC Reviews https://ift.tt/2mVXxXH

January 12, 2020 at 06:55PM

Feed a family for a week with a single bag of beans

https://www.popsci.com/story/diy/frugal-bean-recipes/

Beans are full of protein and minerals. Plus, they're super tasty.

Beans are full of protein and minerals. Plus, they’re super tasty. (Mary Kearl/)

Beans are healthy—high in protein and fiber and packed with nutrients like iron, magnesium, calcium, phosphorus, potassium, and more. They’re also an affordable and versatile way to feed your family—a one-pound bag of red kidney beans costs less than $2 and can make up to 11 servings. If you’re a single adult or have a small family, that can add up to a lot of nutritious and delicious food for a low price.

But because even the healthiest of foods becomes a drag if you eat it the same way five days in a row, the key is to cook your beans in different ways. Stretch your bag of beans into unique meals with these three exciting recipes passed down from a traditional Salvadoran cook. You’ll be able to build off of these dishes, and either enjoy them during the week or freeze them for later.

We produced 17 servings, which for our family of three translates to a total of more than five meals. Adding these recipes to your cooking repertoire is a great way to eat healthy on a budget.

The shopping list

  • Two cloves of garlic
  • A one-pound bag of red kidney beans
  • A large onion
  • A dozen eggs
  • 8 ounces of cream cheese
  • Corn tortillas (how many will depend on your taste and hunger level)
  • Two avocados
  • A one-pound bag of white rice
  • 8 ounces of queso fresco (or a more common cheese, like mozzarella or Monterey Jack)

Total cost: $18 (lower if you have some ingredients at home)

Cost per serving: $1.06

Based on these costs, these three recipes can help you prepare a high-value meal on a budget. Compared to what the average American household spends annually on food, if you cooked a bag of beans twice a month at $1.06 per meal, you could cover the main meals (breakfast, lunch, and dinner) of a family of three for 10 days. This would result in monthly savings of a little over $200.

Meal No. 1: sopa de frijoles (bean soup)

If you want to up the carb count on this meal, you can replace the tortillas with delicious French bread (pan frances). You sure won't go hungry.

If you want to up the carb count on this meal, you can replace the tortillas with delicious French bread (pan frances). You sure won’t go hungry. (Mary Kearl/)

There are many ways to prepare beans. Frying is a popular option, but when you’re starting from scratch, that involves a two-step process: cooking the beans, then frying them. If you’re already cooking them, we’ve got great news for you: you’ve essentially just made sopa de frijoles, a popular soup in El Salvador.

Prep time: 5 minutes

Cook time: 1.5-2 hours (or until the beans are soft)

Ingredients

  • 1 pound of red kidney beans (can be substituted with black beans, if preferred)
  • Two garlic cloves
  • 1/4 of a large white onion
  • Table salt (to taste)
  • 10 cups of water (to start)
  • (Optional) three or more eggs

Tools

  • Knife and cutting board
  • Tablespoons
  • Measuring cups
  • A large pot
  • A strainer

Directions

  1. Rinse the beans with water and drain them with a strainer.
  2. Cut off one-quarter of the onion and put it in a large pot. There’s no need to slice it—it’ll break apart later when you boil it. If you want a hint of onion flavor without actual chunks in your soup, you can infuse it by wrapping the onion in aluminum foil, and poking several holes with a thick needle or knife tip. Once the beans are fully cooked, you can take this out.
  3. Peel the garlic cloves, cutting off the ends. Put them in the pot. As above, if you only want a hint of garlic, you can infuse the soup as with the onion.
  4. Add the beans to the pot containing the onions and garlic, and pour in seven cups of water. Salt to taste and place it on your stove over high heat.
  5. Once the water begins to boil (after about 5 minutes), lower the temperature to medium-high.
  6. Add water as needed, just before the water level begins to drop below the top layer of beans. This isn’t a dish you can set and leave—you’ll want to keep an eye on your pot, making sure there’s always some water inside and the beans never dry out. Expect to add at least 3 cups of water throughout the process. You don’t want to find out what burned beans smell like.
  7. After an hour and 20 minutes, when you have about 10 minutes left of cooking time, add those optional eggs to be hardboiled along with your beans. Put the eggs into your pot whole and let them cook.
  8. To see whether the beans are ready, take a spoonful and give your dish a taste test. They should feel soft as you take your first bite.

Serve with: fresh avocado slices, a wedge of queso fresco, and tortillas (grilled for about a minute each in a frying pan)

Servings: six bowls of soup

Meal No. 2: frijoles fritos (refried beans)

Turn those bean soup leftovers into refried beans.

Turn those bean soup leftovers into refried beans. (Mary Kearl/)

Frijoles fritos are what makes a traditional Salvadoran breakfast, and are commonly accompanied by eggs (sunny-side-up or scrambled), Salvadoran sour cream (crema), queso duro or queso fresco (hard or fresh cheese), and French bread (pan frances), or homemade Salvadoran tortillas(which are thicker than the more widely available tortillas in the U.S.). In the recipe below, we’ve offered substitutes for when these traditional components of the meal are not available.

Prep time: 2 minutes

Cook time: 15 minutes

Ingredients

  • 4 cups of bean soup (from Meal No. 1), broth included
  • 3 tablespoons of vegetable oil
  • 1 tablespoon of chopped onion

Tools

  • Knife and cutting board
  • Tablespoons
  • Blender
  • Large, deep frying pan

Directions

  1. Heat the vegetable oil in the frying pan.
  2. Chop the onion and place it in the pan. Cook on medium-high for about 1-2 minutes, until it’s golden brown.
  3. Remove the grilled onions from the pan and put them in the blender. Leave the oil in the frying pan to be used in a later step.
  4. Add 4 cups of bean soup to the blender and puree until it’s thoroughly mixed. For thicker refried beans, you can strain the soup’s broth.
  5. Using the oil you saved in Step 3, pour the mix into a deep skillet and fry it on medium-high heat.
  6. As the beans begin to bubble, stir as necessary to prevent them from sticking to the pan. Once the bubbling is consistent, lower the heat to medium. Cook until the oil has mixed completely with the beans, which usually takes about 10 minutes.

Serve with: fresh avocado slices, eggs sunny-side-up or however you like them, a generous dollop of cream cheese, and grilled tortillas (fried in a pan for about a minute each)

Servings: six plates of refried beans

Meal No. 3: casamiento (rice and beans)

Casamiento can be served with eggs, tortillas, and avocado, but you can also eat it with your favorite green salad.

Casamiento can be served with eggs, tortillas, and avocado, but you can also eat it with your favorite green salad. (Mary Kearl/)

Casamiento, which literally means "marriage"—referring to the marriage of the beans and rice central to the recipe—is a traditional dish prepared in El Salvador and Central America. It’s often served with eggs, cheese, and tortillas or French bread (pan frances) for breakfast, lunch, or dinner, or as a side dish served along with a heavier meal like carne asada (barbecue).

Prep time: 2 minutes

Cook time: 20 minutes

Ingredients

  • 1/2 cup of rice
  • 1 tablespoon of chopped tomatoes
  • 1 tablespoon of chopped onion
  • 2 tablespoons of vegetable oil
  • 3/4 cups of water
  • 1 1/2 cups of refried beans (from Meal No. 2)
  • Salt to taste

Tools

  • Knife and cutting board
  • Tablespoons
  • Measuring cups
  • Medium frying pan with lid
  • Large frying pan

Directions

  1. Heat oil on medium-high for about 30 seconds, then mix in the chopped tomatoes and onion, and the half-cup of rice. Let it cook for a minute, stirring every 10 seconds.
  2. Add in 3/4 cups of water and salt to taste, then lower the heat to medium. Place a lid on the pan and cook until all the water is absorbed by the rice, which takes about 10 to 15 minutes.
  3. In a separate pan, reheat your refried beans for about 3 minutes. Once the beans are warm, add your cooked rice to the pan of refried beans, then mix together. Cook your rice and bean mix for about 2 minutes on medium heat.

Serve with: a dollop of cream cheese, a wedge of queso fresco, a portion of avocado, and grilled tortillas

Servings: five plates of casamiento

Now you know three different and frugal ways to prepare beans—and maybe you even picked up some Spanish culinary vocabulary along the way. Go practice your cooking, pile up your savings, and impress your friends and loved ones.

via Popular Science – New Technology, Science News, The Future Now https://www.popsci.com

January 10, 2020 at 04:48PM

Amazon Takes a Swipe at PayPal’s $4 Billion Acquisition

https://www.wired.com/story/amazon-honey-security-warning

“We only use data in ways that directly benefit Honey members — helping people save money and time — and in ways they would expect. Our commitment is clearly spelled out in our privacy and security policy,” a spokesperson for Honey told WIRED.

Honey also says that it doesn’t sell the shopping data it gleans from customers. The company makes money by charging some retailers a small percentage of sales made with the coupons it finds—but Amazon has never been one of them.

Is there something you think we should know about these companies? Email the writer at louise_matsakis@wired.com. Signal: 347-966-3806. WIRED protects the confidentiality of its sources, but if you wish to conceal your identity, here are the instructions for using SecureDrop. You can also mail us materials at 520 Third Street, Suite 350, San Francisco, CA 94107.

Amazon’s security warning last month caught Honey by surprise, and the company scrambled to respond. It was forced to temporarily disable several of Honey’s features—like Droplist, which tracks the price of specific items—to prevent the message from appearing to more people. The changes weren’t announced in an official blog post or message to users.

“We’re aware that Droplist and other Honey features were not available on Amazon for a period of time. We know these are tools that people love and worked quickly to restore the functionality. Our extension is not – and has never been – a security risk and is safe to use,” a Honey spokesperson said.\

Browser extensions can be incredibly invasive, and it’s still a good practice to be wary of any that you install in your browser. Amazon warned Honey users that the extension can “read or change any of your data on any website you visit,” but this is a basic functionality of many extensions—which is why only installing ones you can trust is important. In fact, Amazon has a browser extension of its own called Amazon Assistant. It also tracks prices, just like Honey, and allows you to compare items on other retailers to those on Amazon. When users install Amazon Assistant from the Chrome Store, Google also notifies them it can “read and change all your data on the websites you visit.”

Honey says it regularly engages with security firms to assess its protections. Last summer, researchers from the cybersecurity firm Risk Based Security documented a vulnerability in Honey’s extension that malicious websites could exploit to steal user information. But the bug didn’t concern Honey’s own data collection practices, and it was patched on Firefox and Google Chrome in early 2019, according to Risk Based Security. “If ever an individual or independent researcher contacts us about a potential vulnerability, we engage with that person to understand and remedy the issue (if there is one),” the Honey spokesperson said.

There’s still the possibility that Amazon found a legitimate security problem with Honey, but it won’t say what. WIRED also reached out to Google and Firefox, which each host extension stores for their popular web browsers, but neither company could immediately comment.

Amazon is extremely protective of its shopping and customer data. While Honey may not have been a concern when it was only a small startup, it’s now owned by the financial behemoth PayPal, which used to be part of eBay, an Amazon competitor. Amazon still doesn’t accept PayPal as a direct payment option. In the ecommerce world, there’s no incentive to play nice.


More Great WIRED Stories

via Wired Top Stories https://ift.tt/2uc60ci

January 9, 2020 at 02:06PM

HP May Finally Stop Screwing You When It Comes to Printer Ink

https://gizmodo.com/hp-may-finally-stop-screwing-you-when-it-comes-to-print-1840903355

Photo: Alex Cranz (Gizmodo)

HP might finally be changing its printer business plan according to a new note by Morgan Stanley analysts. Typically HP sells printers for super cheap and then charges exorbitant prices for the required ink, leaving consumers paying hundreds a year if they want to keep this printer printing well.

This style of doing business, which nearly all printer businesses engage in, is called the “razor blade model” after the practice of razor companies selling the handle for cheap but charging high prices for the required blades.

Kif Seward of CNBC first tweeted this morning that HP is considering moving away from this business model. Gizmodo confirmed the contents of the Morgan Stanley note and an HP spokesperson told us they’re looking into the report.

According to the note, 20-percent of HP’s customers aren’t printing enough or buying enough ink to make the business model profitable. Which makes sense. As other home office stuff, like your computer, monitor, and mouse, have improved exponentially since the 90s, the printer has kind of stayed stuck. It’s good for printing a term paper or a travel itinerary, but affordable printers aren’t nearly as good at printing photos, and a lot of the other things we once printed, like directions, plane tickets, or tickets to movies or shows, can be stored much more easily on a phone.

Two years ago HP recognized that printers weren’t everyday devices anymore and released the very lovely HP Tango X. This printer was designed to be packed up and stuck in a closet when not in use.

However, it has a flaw. The ink dries up. Back in 2018 HP told me the ink should last over a year, but I found issues with ink clogs within months. Here’s a picture printed after just six months of very minimal use.

Photo: Alex Cranz (Gizmodo)

Why on earth would anyone want to buy a printer if this is what’s happening after six months? Especially if the best solution is to restock the expensive ink cartridges.

The bad news—for anyone looking to buy a new printer—is that Morgan Stanley claims the price of HP hardware will be going up.

HP’s move, if true, just makes a helluva lot of sense. We’ll update this post once we learn more from HP.

via Gizmodo https://gizmodo.com

January 9, 2020 at 12:21PM