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Bias is the error in estimates due to systematic mistakes that lead to consistently high or low results as compared to the actual values. The individual bias of an estimate known to be biased is the difference between the estimated…
You use digital multimeters to find out the current, voltage and resistance in an electrical circuit, and they are must-have devices for anyone who is getting into electronics. Current is measured in amps, and one-thousandth of an amp is called…
Linear equations use one or more variables where one variable is dependent on the other. Almost any situation where there is an unknown quantity can be represented by a linear equation, like figuring out income over time, calculating mileage rates,…
In science, the joule is the unit of energy or work. It is a compound unit defined as 1 newton of force over a distance of 1 meter, or as the kinetic energy of a 1-kilogram mass moving at one…
When purchasing food items, such as fruit or vegetables, you buy them by the pound in the United States. However, when you go to countries that use kilograms instead of pounds, knowing the conversion rate helps you know how much…
A math compass is a metal or plastic V-shaped drawing tool with a clamp on one end to hold a pencil and a sharp point on the other end that keeps the tool steady on the drawing surface while the…
Many snakes live in the world’s tropical rain forest regions and lie in wait to envenom or constrict their prey. However, snakes are not the only predators in the rain forest and some of these predators include snakes in their…
Electricity is due to the flow of electrons through metallic wires. The velocity of the electron flow is known as the current and the potential energy per unit charge is known as the voltage. These are important quantities in electricity…
The colors on a pH strip measure the concentration of hydrogen ions in a solution or in soil. The color on the strip determines the acidic or alkalinity state of the item being tested. With pH test strips — each…
Regardless of where you live, you almost certainly enjoy the benefits of a greater length of daylight in the summer months. If you live in the Northern Hemisphere, summer runs from late June to late September; in the Southern Hemisphere,…
