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Despite being used to talking on phones, tablets or computers, most children will appreciate the simplicity and effectiveness of a tin can walkie-talkie. While enjoying the novelty of communicating using cans and string, kids can gain first-hand knowledge about how…
You can measure sizable amounts of household energy using the therm, which is equivalent to 100,000 British thermal units. When measuring the energy from natural gas, however, you can also use cubic feet. To produce 1 therm of energy, you…
While you may not think about it, the deep sea has its own ecosystem with different plants and animals. The plants and animals that live in these cold environments, however, require special adaptations. Light does not fully penetrate to the…
Observations by the Kepler spacecraft suggest there are 50 billion planets within the Milky Way galaxy. Understanding planets that orbit other star systems can be enhanced by studying worlds closer to home. Planets in the solar system have a number…
Atomic bonding is chemical bonding. Chemical bonding is the physical process that is responsible for the interactions between atoms and molecules. Bonds vary widely; there are covalent, ionic, hydrogen, metallic, as well as many other types of bonds, and all…
Standing on a wood deck might feel warm on a hot day, but a metal one would be unbearable. A casual look at wood and metal won’t tell you why one gets hotter than another. You have to examine microscopic…
When you need to lift a heavy weight, a pulley can make the job easier. A pulley is one of the physic’s six non-motorized simple machines—in this case, one that reduces either the effort necessary to lift a load or…
When you are calculating the amount of mechanical energy used to exert force and move something, you are talking about work being done by a force at a distance. You can describe this in terms of foot-pounds. For example, you…
Electric motors are often rated by one of two methods: amperes (amps) or horsepower (HP). Amperes are a measure of the rate of flow of electricity, whereas horsepower is a measurement of work divided by time, so amperes and horsepower…
Resources are products from the environment that are useful to humans and can be renewable or non-renewable, depending on the propensity they have to regenerate relatively quickly. Oil, gems, and ore are non-renewable because these things take a very long…
