Warning Warning: The downloadable products directory does not exist: /download/. Downloadable products will not work until this directory is valid.
The Science Store @ 4physics.com Email the Scientist.  
  Top » Catalog » Executive & Desk Toys » Items under $20 U.S. » Fun45 Log In  |  Cart Contents  |  Checkout   
Shopping Cart more
0 items
Area of Physics Info more
Heat & Thermodynamics
Other products
Categories more
4th Dimension Metrics-> (14)
Art to Live With (12)
Executive & Desk Toys-> (37)
  Items over $20 U.S. (18)
  Items under $20 U.S. (19)
Games & Puzzles (7)
Glow-in-the-Dark Products-> (38)
Jewelry-> (46)
Kits & Models-> (33)
Lab Essentials-> (74)
Lighting-> (13)
Musical Items (6)
Optical Devices (9)
Posters, Books, Cards-> (16)
Radios (1)
Things We Like (10)
Boats & Tin Toys-> (21)
Weather Instruments-> (5)
Young at Heart - Toys-> (40)
Areas of Physics more
What's New? more
Pewter Nocturnal
Pewter Nocturnal
Site Search
Paypal - for security in payment worldwide Paypal can be used for purchases outside the USA
VISA, Mastercard, Discover, American Express, and eChecks accepted via Paypal!
Checks and Money Orders Accepted
We also accept checks
and money orders!
We can ship to you! We can ship to you!

Wiregrams Memory Wire $18.50

Wiregrams are pre-shaped pieces of memory wire fun to use in magic tricks or just to amaze your friends and yourself. Straightened carefully by hand, they look like any piece of standard metal wire. But, just dip one in hot water and watch it spontaneously change into its preset form!

Wiregrams are made from a shape memory alloy. Shape memory alloys undergo phase transitions - rearrangements of the atoms that alter the crystal structure of the metal - at different temperatures before they melt. The original configuration for the piece is set while keeping it above its phase transition temperature. The material is then cooled rapidly (quenched) to "lock in" the starting configuration. Once cooled, it can be re-shaped into any configuration. Heating it again, without constraining its shape, above the transition temperature causes the original shape to reappear as the higher temperature crystalline configuration forms.

An open flame, carefully applied, will also cause the shape transformation. Click here to watch a short video of the effect.

Sold individually. Available in the pre-shaped forms: Jack of Spades, Three of Hearts, Seven of Hearts, Seven of Diamonds, Eight of Hearts, or Ace of Spades. If you have a first and second preference, please indicate in the comments when ordering.

Recommended for ages 10 and up.

1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'physics_catalog.o.date_purchased' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

select p.products_id, p.products_image from orders_products opa, orders_products opb, orders o, products p where opa.products_id = '419' and opa.orders_id = opb.orders_id and opb.products_id != '419' and opb.products_id = p.products_id and opb.orders_id = o.orders_id and p.products_status = '1' group by p.products_id order by o.date_purchased desc limit 3