Category: Physics

How can you melt ice fast? In a bucket, combine a half-gallon of hot water, about six drops of dish soap, and 1/4 cup of rubbing alcohol. Once you pour the mixture onto your sidewalk or driveway, the snow and ice will begin to bubble up and melt. Just keep a shovel handy to scrape […]

What is the difference between the ground state and the excited state of an atom quizlet? The ground state is the lowest energy state the electron can occupy. When the electron absorbs energy, it can move to a higher-energy level, or excited state. What does it mean to say that an atom is in an […]

How do you explain ionic bonding? Ionic bonding is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion. […]

What is the formula of effort distance? The effort distance (also sometimes called the “effort arm”) is shorter than the resistance distance. Mechanical advantage = |Fr/Fe | where | means “absolute value.” Mechanical advantage is always positive. Switch to a 100 gram mass. What is the efficiency of the machine? The efficiency of a machine […]

Why bandwidth of digital signal is infinite? A true square wave has a vertical line for its face. That is, an increase from Vmin to Vmax in zero seconds. Anything (except zero) divided by zero is infinity. In reality it takes time for the voltage to rise from Vmin to Vmax, and so there is […]

Is a 100 year old person old and 1000 year old artifact ancient? Answer: the hundred year old person is not ancient since alot of people can move up to a hundred years while the thousand year old artifact is ancient since alot of artifacts break early or a while but some will manage to […]

What are the 3 laws of force? In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other […]

What happens when the temperature of moist air decreases? Ratio of the amount of water vapor in the air to the amount of water vapor needed to reach saturation. What happens when the temperature of air decreases to the dew point? it creates cool clear nights with little wind. In cooler temperatures the water molecules […]

Why does normal wire fail at microwave? Conventional wires can not carry microwaves because of the energy they give off; instead, coaxial cables can carry microwaves up to 5 GHz in frequency because their self-shielding conductors prevent radiating energy. Is the transmission of data by microwave radio waves? Microwave is a line-of-sight wireless communication technology […]

Why do ski jumpers not break their legs? The ski jumpers will intentionally abort their long flying stance to land sooner and also change how they land in order to get an easier landing so they do not hurt themselves. Landing on a flat surface the total force on the legs is almost entirely vertical […]