Verbs

Fire is not invisible; fire is the chemical chain reaction from combustion that creates heat and light. Combustion, which is the actual burning process, is strictly chemical rearrangement and is invisible - but once you add oxygen to it, it becomes visible as fire.

Hexane was discovered by the French chemist Edmond Fremy in 1870.

The two most important principles of democratic theory are popular sovereignty, which emphasizes that political power resides with the people, and political equality, which stresses that all individuals have an equal opportunity to participate in the decision-making process.

Pheromone disruption, in a nutshell, is when you expose pest insects to high amounts of their sex pheromones. This causes the males of the species to become confused and unable to contact and mate with as many females, causing the offspring numbers to be reduced dramatically. Pheromone distruption, also known as communication disruption, is commonly used in pest control on cash crops.

Thermo softening plastics have a lower melting point, making them more susceptible to deformation when exposed to heat. This can lead to a decrease in mechanical strength and make them more prone to breaking under stress compared to thermosetting plastics.

The thermal Peclet number (Pet) is a measure of the relative importance of advective to conductive heat transport .

Pet = (vl)/k

where 'v' is the velocity at which the material is moving, 'l' a length scale and 'k' (kappa) the thermal diffusivity.

In simpler words,

Pet >>1 implies : advection dominates

Pet <<1 implies : conduction dominates.

[thermal diffusivity : can be thought of thermal inertia, a higher value means rapid movement/flow of heat through substance relative to its volumetric heat capacity or 'thermal bulk' is possible, therefore, when k is large, conduction dominates ]

[advection : transportation of some qty via bulk flow of a fluid medium]

Voice analysis bioacoustics involves studying the sounds produced by living organisms, such as animals or humans, to gather information about their behavior, health, or physiology. By analyzing the characteristics of these vocalizations, researchers can gain insights into various aspects of an organism's biology, including stress levels, reproductive success, or species identification.

Sulfur has been known since ancient times, as it is a naturally occurring element. It was used by the ancient Egyptians and Greeks for medicinal and industrial purposes. The exact date of its discovery is not known due to its early and widespread use.

SWCNTs are almost certain single-walled carbon nanotubes. These are composed entirely of carbon and the molecule is in the shape of a long hollow tube. The structure is essentially a rolled up tube of a single layer of graphite. If the SWCNTs are functionalized, it means that they have other molecules attached to them. PPE is probably polyphenylene ether, which is a type of plastic. See the Web Links for some pictures and more information

Anne Frank referred to these periods as "hunger weeks" in her diary. During these times, the limited availability of food forced her family to rely on one particular dish or vegetable for sustenance.

Levitating a person goes against the laws of physics and is not possible. Any claims of levitation are usually tricks or illusions.

Phosphoric acid in cola can help remove rust due to its acidic properties. It weakens the iron oxide (rust) bond, making it easier to scrub away the rust from metal surfaces. However, using cola as a rust remover may not be as effective or efficient as dedicated rust removal products.

Sound can bounce off hard surfaces, like light can off bright surfaces. A sound starts and the sound bounces, the sound then bounces off another wall and another and so on. When it bounces it splits into all the directions its side of the wall (if you imagine a protractor against the wall the sound will travel in all angles on that side of the wall.

Every time it bounces the sound gets quieter as the energy is lost. The more hard surfaces in a room the less energy is absorbed by the surface. Therefore the reason this does not work in your house it because you may have carpets, pillows on chairs and sofa's.

The air pressure pushing up on the paper is greater than the gravitational force pulling down on the water, creating a temporary barrier that holds the water in place. This creates a vacuum seal, preventing the water from spilling out when the glass is turned upside down.

Standing time refers to the amount of time you let a dish rest after it has been removed from an oven, stove, or other heat source. This standing time allows the food to finish cooking, evenly distribute heat, and for flavors to develop. It is an essential step for ensuring that your dish is cooked properly and tastes delicious.

Your father, who works on the corner at a crackhouse.

A U.S. nickel weighs approximately 5 grams, so you could use around 3/5th of a nickel to represent an object that weighs 3 grams.

Refraction is commonly used in lenses to correct vision in eyeglasses and contact lenses. It is also used in the design of cameras and microscopes to focus light. In addition, refraction is utilized in the creation of optical fibers for telecommunication and in the dispersion of white light into its individual colors in prisms.

"Pulse motor" likely refers to a type of electric motor that operates on pulses of energy. "Sensation times four" could mean experiencing a sensation four times or amplifying a sensation. The context would be needed to provide a more specific interpretation.

A mirror is a smooth surface that reflects light and forms images. It can be made of glass with a reflective coating on one side. Mirrors are commonly used for personal grooming, decorating, and scientific purposes.

Some are born ticklish, some are not, some become ticklish later, an injury can make you ticklish e.g. a spinal injury will affect nerves, sometimes making one ticklish where you weren't ticklish before.

Flews are the large overhanging sides of the upper lips of some (usually large) dogs, such as Great Danes, Saint Bernards, etc. Or...could you have possibly meant "flue," as in a chimney pipe, organ tube, or fishing net?

After receiving the I-797 Notice of Action, you should carefully review the details to understand the next steps in your immigration process. It typically provides information on the status of your application or petition and any further actions required, such as attending an interview, submitting additional documents, or completing biometrics. If you have any questions or concerns, you can contact the USCIS or your immigration attorney for guidance.