Category: Physics

Why does a comb attract hair? The charge on the screen attracts dust. The molecules orientate their dipoles, the negative oxygen towards the comb; the positively charged hydrogens away from it. When you comb your hair with a nylon comb, both the comb and your hair become charged. The comb and your hair acquire opposite […]

Which of these is an example of negative reinforcement? Deciding to take an antacid before you indulge in a spicy meal is an example of negative reinforcement. You engage in an action in order to avoid a negative result. One of the best ways to remember negative reinforcement is to think of it as something […]

How do you find mass with only volume? The Density Calculator uses the formula p=m/V, or density (p) is equal to mass (m) divided by volume (V). The calculator can use any two of the values to calculate the third. Density is defined as mass per unit volume. What is the formula of the Mass? […]

Does bike weight affect speed? (A heavier bike won’t make up the entire difference, especially if the downhill requires breaking, but it will accelerate slightly faster than a lighter one.) A much more efficient—and economical—way to lighten your load is to shed body weight, says Gourley, not bike weight. Why is it hard to pedal […]

How much should a car battery drain overnight? If its a new battery with a good charging system 12.8 to 12.6 is what you should expect. The problem is in order to save fuel a lot of charging systems only charge your battery 80% to save fuel. How do I know if I need a […]

What is the volume of an ideal gas? What is the volume of 1 mole of an ideal gas at STP (Standard Temperature and Pressure = 0 °C, 1 atm)? So, the volume of an ideal gas is 22.41 L/mol at STP. This, 22.4 L, is probably the most remembered and least useful number in […]

What are three living organisms? Organisms are classified by taxonomy into groups such as multicellular animals, plants, and fungi; or unicellular microorganisms such as protists, bacteria, and archaea. All types of organisms are capable of reproduction, growth and development, maintenance, and some degree of response to stimuli. What are the three organisms? In an ecosystem, […]

Is potential difference the same as voltage? The potential difference (which is the same as voltage) is equal to the amount of current multiplied by the resistance. A potential difference of one Volt is equal to one Joule of energy being used by one Coulomb of charge when it flows between two points in a […]

What is the perfect amount of water for bottle flipping? Fill a plastic water bottle about one quarter to one third full with water and put the cap on tightly. Hold the bottle loosely by the neck, and toss it forward (so the bottom rotates away from you). Try to throw the bottle so that […]

What are the two attachment points of skeletal muscle? A skeletal muscle attaches to bone (or sometimes other muscles or tissues) at two or more places. If the place is a bone that remains immobile for an action, the attachment is called an origin. If the place is on the bone that moves during the […]