kit, properties of materials, allows students to make a wide range of investigations with only a small number of items, kit contains two sets of three metal cylinders - aluminum, copper, and steel. In one set the cylinders all have equal masses
kit, properties of materials, allows students to make a wide range of investigations with only a small number of items, kit contains two sets of three metal cylinders - aluminum, copper, and steel. In one set the cylinders all have equal masses
EZ Heat* hand warmers provide 130F of heat in seconds. This unique heat source is reusable and can be recharged for repeated use. Portable. Safe instant heat on command.