Architecture

Ultrasound is sound we can not hear. Our ears can detect vibrations between 20-20,000 hertz (vibrations per second); anything outside this range is still physically a sound, but we simply can't detect it.

Ammonia is used for refrigeration in an absorption type plant use for large cold stores. The ammonia is not the refrigerant itself, this is usually water, but as means of absorbing the water vapour and returning it as a liquid to the start of the cycle. Unlike a conventional fridge that uses a compressor to do this. The advantages of ammonia cycle plants are that they have no moving parts and can be built to any size. The motive power for the system can be any source of heat which separates the water and the ammonia at the cycle start.

At 12pm(noon) the sun is just on the earth's equator.At this time if any person living in equatrial country see the sun,he will find it quite on his head i.e.in upward and not in any direction.

In the same time if a person in northen hemisphere(Asia,Europe,north America) sees the sun,he will find it up,but a little southwards.This 'a little' increases with increase in the distance between him and equator.So we get more light in the south

direction.

Similarly reative to the equator in sourthen hemisphere(Australia,lower Africa and Australia) we find sun a little northwards in the sky.So we get more light in north direction(because sun is there).Hence the norhern side of houses or trees gets more light.

It is exactly equal to the length of string you have measured in centimeters.

Geographers use scales to accurately represent the size and distance of features on maps relative to the actual size on Earth's surface. Scales help to maintain proportion and ensure that maps are a true representation of reality. Different scales are used depending on the level of detail needed for a specific map or study.

Transparent or translucent objects do not cast a dark shadow because light can pass through them easily, preventing the formation of a clearly defined shadow. Materials like glass or clear plastic will not produce a dark shadow when exposed to light.

3-methyl-4-chlorohexane is a compound with six carbon atoms in a chain, a chlorine atom attached to the fourth carbon, and a methyl group attached to the third carbon. It is an alkyl halide, a type of organic compound.

The difference in classification of low alloy and high alloy steels is based on the metal composition: low alloy steels include a lower concentration of alloying metals versus high alloy steels. The composition affects properties like strength, ductility, etc.

The number of exits in a building is determined by the occupancy capacity, layout, and size of the building. Building codes and regulations often require a minimum number of exits to ensure safe evacuation in case of emergencies. Factors such as the number of occupants, travel distance to exits, and accessibility also influence the number of exits required.

The best design for an earthquake-proof building typically includes features such as base isolators, dampers, flexible or reinforced structures, and regular maintenance to ensure structural integrity. These elements help the building absorb and dissipate seismic energy, reducing damage during an earthquake. It's also essential to follow local building codes and standards for seismic design to enhance the building's overall resilience.

The gaps in fortification battlements are called crenels. These are the openings in the parapet wall that allow defenders to shoot at enemies while also providing cover. The sections in between the crenels are called merlons.

The palm of your hand appears white due to a thick layer of skin that lacks melanin, the pigment responsible for skin color. Additionally, the skin on the palm is constantly rubbing against objects, which can cause it to appear lighter in color compared to other parts of the body.

Friction between the soles of your shoes and the ground helps to prevent your feet from sliding out. The tread pattern on the bottom of your shoes also provides additional grip to help you maintain traction while walking or running. Additionally, your body's natural ability to adjust and stabilize your movements helps to keep your feet steady with each step.

You are describing a fuse. Fuses are protective devices used in electrical circuits to prevent damage from excessive current. When the current exceeds a safe level, the metal strip inside the fuse melts, breaking the circuit and stopping the flow of electricity.

Rust
Here :
Fe2O3 + xH2O-> Fe2O3.xH2O(Rust)
FeO + xH2O-> No visible change
x is any number of water molecules.

Radiographers must wear a protective apron, gloves, and collar with a lead equivalence of at least 0.5 mm. The employer must provide all personal protection equipment and training on the proper use of the PPE.

If the lot has 90 degree angles between sides, the size of a 40' x 100' lot is 4,000 square feet or 0.092 acres.

mils is a colloquial term and as such could have more than one meaning. It is possibly short for millilitres (mL) and is therefore 60 mils is 60mL.

60mL is approximately 1/4 of a (non-metric) cup. A metric cup is 250mL.

mils also refers to a unit of thickness 1 mil = .001 inch

The star 61 Cygni B is estimated to have a main sequence lifetime of approximately 10 billion years.

Architects and engineers design buildings, houses, and bridges to withstand earthquakes by incorporating seismic-resistant techniques such as base isolation, damping systems, and reinforced concrete structures. They also consider factors like the building's location, soil conditions, and the expected level of seismic activity in the area. Additionally, seismic codes and regulations play a crucial role in ensuring that structures are built to withstand the forces generated by earthquakes.

Jacques Cartier was born in Saint-Malo, France around 1491. He came from a wealthy family and received a good education. He was trained in navigation and seamanship before embarking on his explorations.

When homeostatic mechanisms fail, the body's internal balance is disrupted, leading to various health problems. This can result in conditions such as high blood pressure, diabetes, or dehydration. If left unaddressed, these disruptions can lead to more serious complications and impact overall well-being.

no he didn't because if he did why has no-one else gone up there , and if it "took him" a year to get there an back how come it took the Chinese two years to get half way and back? an rover the robot cant find "the" USA pole he "stuck" in the ground an there is no trace that anyone was up there