Category: Physics

Why is green the rarest eye color? 4. Green Eyes. Very little melanin, a burst of lipochrome, and the Rayleigh scattering of light that reflects off the yellow stroma can make for a variety of shades of green. With only two percent of the world’s population having green eyes, it’s definitely rare! What nationality has […]

How will you rate yourself from 1 to 10? There are people who say that your automatic response to rating yourself (on a scale of 1 to 10) should be “11”. They believe that anything less would be admitting a weakness. I don’t agree. An over-the-top answer like that is bragging, which is a lot […]

Can zinc be absorbed through the skin? Small Amounts of Zinc from Zinc Oxide Particles in Sunscreens Applied Outdoors Are Absorbed through Human Skin. Does zinc oxide clog pores? One of the benefits of zinc oxide that is important to acne-prone is that it is non-comedogenic. In a nutshell, that means it’s oil-free and won’t […]

How is energy calculated? As every engineer knows, energy calculation is straightforward. The unit of electrical energy is the kilowatt-hour (kWh), found by multiplying the power use (in kilowatts, kW) by the number of hours during which the power is consumed. Multiply that value by the cost per kWh, and you have the total energy […]

What is the best source of information Why? Explanation: The Internet is by far the most popular source of information and the preferred choice for news ahead of television, newspapers and radio, according to a new poll in the United States. What is non reliable source of information? Non-credible websites may have a poor design, […]

What is the gas law for pressure and temperature? Gas laws, laws that relate the pressure, volume, and temperature of a gas. Boyle’s law—named for Robert Boyle—states that, at constant temperature, the pressure P of a gas varies inversely with its volume V, or PV = k, where k is a constant. What happens to […]

What is the mass of the products? Mass of products is equal to mass of reactants. This equation can be read in “moles” by placing the word “moles” between each coefficient and formula. A mole-mole factor is a ratio of the moles for any two substances in an equation. How do you calculate reacting mass? […]

How do you solve a problem with two missing variables? In a two-variable problem rewrite the equations so that when the equations are added, one of the variables is eliminated, and then solve for the remaining variable. Step 1: Multiply equation (1) by -5 and add it to equation (2) to form equation (3) with […]

How is a meter determined? The metre is currently defined as the length of the path travelled by light in a vacuum in 1299 792 458 of a second. The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole along a great circle, so the […]

Can you connect 4 walkie talkies? The short answer is yes, all walkie talkies can work together if they are on the same frequency, regardless of the brand or design. Are all Retevis walkie talkies compatible? Retevis RT22 and Retevis 15 are both FRS, Retevis H-777 is UHF,they can be programmed to the same frequency […]