Category: Physics

Can cell division reproduce an entire organism? A) Cell division is the basis of both sexual and asexual reproduction. Cell division is necessary for development to occur. C) Cell division is common in eukaryotes but rare in prokaryotes. D) Cell division can reproduce an entire organism. Why animals can reproduce in large number? Animals have […]

Can we see Earth rotation from space? At GO, your orbital period is 24h. So as the earth makes one rotation, the object in GO will complete one orbit (flyaround of the earth). You don’t see the earth spinning from earth because it spins at 360 degrees per day. Can a plane fly faster than […]

Is United States in the Western Hemisphere? The United States is located in both the Northern and Western hemispheres. The Equator divides the Earth into Northern and Southern hemispheres while the Prime Meridian divides the Earth into Eastern and Western hemispheres. How many countries are in the Western world? A Partial List of Western Countries […]

Why is a touchdown six points? So, a touch down is worth two field goals and you get a bonus with a touch down by trying either a 2 point or 1 point conversion after the touch down. Therefore, the 6 points is one up from a Rugby try and in balance with the several […]

Who invented 360 degrees? Timocharis, Aristarchus, Aristillus, Archimedes, and Hipparchus were the first Greeks known to divide the circle in 360 degrees of 60 arc minutes. Eratosthenes used a simpler sexagesimal system dividing a circle into 60 parts. What is 360 rotation? “Doing a 360” means spinning around completely once (spinning around twice is a […]

What is another name for the vernal equinox? The vernal equinox (also called the spring equinox) is one of the two equinoxes—the times of the year when the amount of daylight and nighttime hours are just about of equal length. Will there be a early spring 2021? In 2021, the March equinox happens on Saturday, […]

What is the relation between CP CV and R? where cp is the specific heat coefficient at constant pressure, cv is the the specific heat coefficient at constant volume, gamma is the ratio of specific heats, and R is the gas constant from the equation of state. Is gamma CP a CV? gamma = cp […]

How do liquids compare to density? If you weigh equal amounts or volumes of two different liquids, the liquid that weighs more is more dense. If a liquid that is less dense than water is gently added to the surface of the water, it will float on the water. If a liquid that is more […]

What is the relationship between light and photography? The relationship between the light, the subject and the viewer is at the heart of Lighting. The photographic subject can transmit, absorb or reflect photons (light particles). What is light and why it is important to photography? Lighting is a key factor in creating a successful image. […]

What is the difference between salt and sugar dissolving in water? The oppositely charged ends of polar water molecules attract the ions and pull them away, resulting in dissolving. Sugar is made from sucrose molecules which are larger and more complex than the ions in salt (See Teacher Background Lesson 1.2). When sugar dissolved in […]