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Miscellaneous

The Miscellaneous category is for a wide variety of questions and answers that we find important, but that have not found a home in one of our specific categories.

14,596 Questions

Can you construct a 2 hour rated barrier using metal framing and metal lath with sprayed fireproofing materials?

Yes you can create a 2 hour fire rating, but from one side only, unless you spray apply the same thickness of fire protection on both sides of the wall. Each will require well over 2" of fire protection. Use ULI design U 703 as an example. These designs are available to download on the ULI web site. This is not an inexpensive solution. A better solution would be to use regular wall boards. If spray applied materials must be used, then the only optionis the above.

How are druzy quartz made?

How in the world am I suppose to know?!

Druzy is the term given to gemstones that have a natural surface texture much like fine sugar crystals. This signature crystal formation is created by a thin layer of crystal quartz covering the surface of a host stone. Druzy is also known as "drusy" or "druse". The crystals that fill the inside cavity of a geode, such as amethyst or citrine, are also examples of druzy.

Is the pulmonic valve closed during diastole?

Yes, the pulmonic valve is closed during diastole to prevent blood from flowing back into the right ventricle after it has been pumped out during systole.

What are photochemical decomposition reactions?

Photochemical decomposition reactions occur when a compound breaks down into simpler substances due to exposure to light energy. This process often involves the absorption of photons by the compound, leading to the cleavage of chemical bonds and the formation of new products. Examples include the photolysis of ozone in the atmosphere or the decomposition of hydrogen peroxide in the presence of ultraviolet light.

What is the circumference of a soda bottle?

The circumference of a soda bottle can vary depending on its size and shape. To find the circumference, measure the distance around the widest part of the bottle using a flexible measuring tape or a piece of string that you can then measure with a ruler.

Why do water drops combine on a surface?

Water drops combine on a surface due to surface tension. Surface tension is the property of a liquid that allows it to resist external forces. When two or more water drops come into contact, the surface tension between them causes them to merge into a larger drop.

What happens to a particle in a solid when cooled?

When a solid is cooled, the particles within it lose kinetic energy and move more slowly. This causes them to vibrate less and come closer together, leading to a decrease in the overall volume of the solid. As the temperature decreases further, the particles may align into a more orderly arrangement, resulting in the formation of a solid crystal structure.

You have an electric prepaid token meter Someone came round to read the meter and you don't understand why if you pay before you use the electric Will you be billed and if so why?

"STS token meters" using "sneakernet" via cards or 20 digit numeric tokens typically can't communicate back to the utility, so they still have to read them and check then for tampering.

It's less than the normal monthly readings, so the utility can save some money.


Really good prepaid smart electric meters like the Echelon (http://www.echelon.com), Elster (http://www.elster.com) or Itron (http://www.itron.com) ones communicate back to the utility company so they get usage information, and are very tamper resistant. Good prepaid electricity payment systems like UtiliFlex (http://www.utiliflex.com) gateway that information into utility company CIS systems, keeping them from having to read a meter, unless they suspect tampering from abbarent usage patterns or tamper alerts.


Does repeatedly pushing an elevator button make the elevator come sooner?

No. Pressing the button once will tell the control logic that a rider is waiting for the lift. It will respond by stopping the next upgoing or downgoing car on that floor. It's that simple.

A substance with a very low Ksp is?

A substance with a very low Ksp has low solubility in water, meaning only a small amount of it can dissolve in solution. Substances with low Ksp values tend to precipitate readily when the solution is saturated.

The process of marking tracks and sectors to prepare the disk to receive data is called what?

The process of marking tracks and sectors to prepare the disk to receive data is called formatting. This process creates the necessary structures on the disk for storing and organizing data in a way that can be easily accessed and managed by the operating system.

What is used to remove calcium carbonate deposits in toilets?

A common method to remove calcium carbonate deposits in toilets is to use a mixture of vinegar and baking soda. Pour vinegar into the toilet bowl, add baking soda, and let it sit for a few hours before scrubbing and flushing. You can also use a commercial descaling product specifically designed for toilets.

What are ring stands used for?

It clamps to a long neck beaker so that you can use a bunsen burner to heat whatever chemical(s) that are present in your concoction.

In which direction do you turn the coarse adjustment knob to move the objective away from your slide?

You should turn the coarse adjustment knob counterclockwise to move the objective away from your slide. This will increase the distance between the objective lens and the slide, allowing you to focus on the specimen more easily.

What does einsteinium look like?

Those who have seen this element, Einsteinium, claim it is a silvery, heavy, radioactive metal.

It is produced after several years of irradiation of plutonium, and then further enhanced. It has no known uses, so information may continue to be sparse.

How far a microphone can detect a sound?

The distance a microphone can detect a sound depends on its sensitivity and directionality. In general, most microphones can pick up sounds within a range of a few feet to several hundred feet, depending on the environmental conditions and background noise. External factors such as wind, obstacles, and interference can also affect a microphone's ability to detect sound.

How you sketch a Graph of velocity vs time for an object falling from rest taking into account air resistance?

The graph of velocity vs. time for an object falling from rest with air resistance would show the initial steep increase in velocity as the object accelerates due to gravity. As air resistance increases with speed, the velocity will eventually reach a terminal velocity where the force of gravity is balanced by the force of air resistance, resulting in a constant velocity. This would be represented by a curve that levels off as it approaches the terminal velocity.

How do you get bubble gum out of clothing?

Place the clothing in the freezer to harden the gum, then carefully scrape it off with a butter knife or spoon. If any residue remains, dab it with a cloth soaked in white vinegar or apply a stain remover before washing the clothing as usual.

What kinds of liquids evaporate fast?

Generally, liquids with low boiling points will evaporate faster. This includes substances like alcohol, acetone, and gasoline. Additionally, liquids with high surface areas exposed to air will also evaporate quickly.

Why does a clock go clockwise?

Clocks are made to rotate that way. The clock face is modeled after the sun dial, a more primitive way to track time throughout the day.
Prior to the invention of mechanical clocks, sundials were used to tell time. In the northern hemisphere, the sun's shadow moves around a sundial in a clockwise arc. Mechanical clock dials emulate this motion. Had clocks and sundials been developed first in the southern hemisphere, clocks would go counter-clockwise today. Of course, we would still call that direction clockwise.

How much is 60kg in pounds?

60kg is equivalent to approximately 132 pounds.

Nanoseconds in one year?

There are 31,536,000,000,000 nanoseconds in one year.