by STAO ADMIN | Nov 14, 2019
A pendulum is constructed from a 1.0-kg mass suspended from the ceiling, with a length of strong string long enough so that, when pulled about 40o from the vertical, the mass comes to nose level. The pendulum will be released from this position. The demonstrator is to...
by STAO ADMIN | Nov 14, 2019
In this demonstration, students will see how an antibody can disable antigens to help eliminate foreign invaders from the body and prevent humans from getting sick.
by STAO ADMIN | Nov 13, 2019
There are many different kinds of polymers, both natural and synthetic. Polymers are widely used and have many practical applications based on their properties. They are often strong and chemically stable. Examples of natural polymers include proteins, starch,...
by STAO ADMIN | Nov 13, 2019
This activity illustrates the effect of intermolecular forces on surface tension of a liquid. Students attempt to place drops of various types of liquids on the face of a penny (or any available coin). The substances with stronger intermolecular forces have greater...
by STAO ADMIN | Nov 13, 2019
Heat transfers in physical and chemical reactions have many practical applications. Exothermic reactions release heat to the surroundings, resulting in an increase in surrounding temperature. Endothermic reactions require heat from the surroundings, resulting in a...
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