Category: Physics

Is walking a push or pull? Take walking. We walk by pushing down and backwards on the ground. The ground, obedient slave to the laws of physics that it is, pushes up and forwards on our feet, propelling us along. How do you know that a push or a pull is a force? All forces […]

What is transistor action? So in a NPN Transistor it is the movement of negative current carriers (electrons) through the Base region that constitutes transistor action, since these mobile electrons provide the link between the Collector and Emitter circuits. How many electrons are there in a transistor? There are about 6.24×1018 electrons per Coulomb, so […]

Why does your hair stand on end when you touch a Van de Graaff? When the Van de Graaff generator starts charging, it transfers the charge to the person who is touching it. Since the person’s hair follicles are getting charged to the same potential, they try to repel each other. This is why the […]

What is a low center of gravity? The lower your center of gravity, the easier it is to keep your balance. If you’re sitting on a chair, you can lean over more than if you’re standing up. With your center of gravity low, you can lean further to one side or the other without creating […]

Which is equal to 0.0079 in scientific notation? Therefore, the decimal number 0.0079 written in scientific notation is 7.9 × 10-3 and it has 2 significant figures. What is the scientific notation for 140000000? Why is 140,000 written as 1.4 x 105 in scientific notation? How do you write 0.72 in scientific notation? Therefore, the […]

What does it mean when the moon is really bright? The moon only seems bright in the night sky because it is so close to the earth and because the trees, houses, and fields around you are so dark at night. In fact, the moon is one of the least reflective objects in the solar […]

What is the least reactive element? Noble gases Which of these parts of an atom is the smallest? Electrons are the smallest of the three particles that make up atoms. Electrons are found in shells or orbitals that surround the nucleus of an atom. Protons and neutrons are found in the nucleus. What are the […]

Can you stop while merging? Do not stop before merging into freeway traffic, unless it is absolutely necessary. Freeway traffic has the right-of-way. When it is safe, follow the “3-second rule” (refer to the “Do not be a tailgater!” section). Do not try to merge into a gap that is too small. Why is the […]

How will you describe primary colors? Primary colors include red, blue and yellow. Primary colors cannot be mixed from other colors. They are the source of all other colors. Secondary colors are mixed from two primary colors adjacent to each other on the color wheel. How many primary colors are there? three What are 4 […]

Who is the founder of functionalism psychology? William James Which is a behaviorist most likely to study? 240 Cards in this Set Of the following, a behaviorist is most likely to study: animal learning. Pavlov repeatedly paired a buzzer with the presentation of food and measured salivation to each. In this experiment the food was […]