Lunchbox Metal

by admin on Oct.27, 2009, under Uncategorized

Lunchbox Metal

If you are sending your child to school with a packed lunch, consider getting her a lunch box to carry the food in. Of course not all lunch boxes are created equal. They vary in size, material and price quite a bit. Here are some suggestions on how to pick a good lunch box for children.

Plastic Or Metal

Your first consideration should be the material of your childÂ’s lunch box. Popular choices are plastic and lightweight metal such as aluminum. While aluminum is slightly sturdier than plastic, I prefer plastic lunch boxes. They are lightweight and easy to care for. Plastic lunchboxes can also easily be decorated and customized.

Size

The next determining factor is size. How large of a lunch box does your child need. Unless you are buying one for a growing teenager, you donÂ’t need a large lunch box. Remember, your child will have to carry the box around every day. Stick with a small size, but make sure it is large enough to hold a sandwich, juice box and a small cup that you can put a side dish like fruit salad in.

Insulated Or Non-Insulated

The last thing I would like you to consider is if you need an insulated or non-insulated lunch box. For most children, a non-insulated lunch box will do just fine. Unless you are planning on fixing lunch items that need to stay cool to avoid spoiling, stick with a simple plastic lunch box. If you do end up fixing something that should stay cool, like a chicken salad wrap for example, pack a Ziploc bag of ice cubes along with the wrap. Use a small thermos to send hot items like tea or soup to school with your child.

Of course the next question what to pack in the lunch box itself. Here are some great pack lunch ideas for kids http://www.kinderinfo.com/articles/pack-lunch-ideas.htm

Give the lunch box you and your child picked a personal touch with this lunch box craft idea http://www.kinderinfo.com/crafts/design-your-own-lunchbox.htm

A newspaper and a metal lunchbox are sitting in the sun. Why does the metal lunchbox feel hotter to touch than?

A. The metal lunchbox has a higher latent heat of fusion.
B. The metal lunchbox has a higher conductivity.
C. The metal lunchbox is at a higher temperature.
D. The metal lunchbox has a temperature far above absolute zero.
ty to every one who said b!

The answer is B, and here’s why. Heat transfers from those objects to your hand because of a difference in temperature. As long as either one is hotter than your hand, touching it will transfer heat to your hand. Because the metal has a higher conductivity than the newspaper, it is able to transfer heat to your hand at a faster rate than the newspaper, so it “feels” hotter. In reverse, when metal is extremely cold (think a lamp post) and you touch it with your tongue, it conducts heat away from your tongue much more quickly than a piece of wood. So, when you touch it with your tongue, it cools fast enough to freeze your saliva and your tongue sticks to it, but the wood can’t pull heat away from your tongue fast enough so it doesn’t freeze (and no stuck tongue). 70° water feels significantly colder than 70° air because water can pull heat away faster. Your vinyl steering wheel sears your hand in the summer while your cloth steering wheel cover doesn’t. In other words, it’s all about conductivity.

Marilyn Manson – Lunchbox: Unclean Version