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Technology

The practical application of knowledge, especially in a particular area, is called technology. Advances in technology affect every area of our lives. This category is for questions about technology and includes everything from how to remove a scratch from a CD to applications of electronics to what polyester is made from and more.

35,090 Questions

Why do astronomers depend on technology?

Back in the older times astronomers didn't have our current instruments, but as time went on technology advanced and made it easier for astronomers to do what they do. But to answer your question astronomers depend on Technology because they want accurate observations and plus like i said earlier it is easier to use technology.

What are other ways that an observation can be made?

An observation can also be made using instruments such as microscopes, telescopes, or sensors to gather data. Additionally, observations can be made through experiments, surveys, interviews, or simulations to study various phenomena or events. Furthermore, observations can be made through indirect methods, like analyzing patterns or trends in data or using mathematical models to make predictions.

What are the different types of night lights?

Moonlight would be the most common, and under clear conditions, the light from a full moon will just be enough to allow you to see colours outside, or to read (slowly) a newspaper.

Auroral lights are only useable to those in polar latitudes, but are brilliant and fascinating.

Starshine - the glow from the rest of our galaxy, is of a limited value on dark nights.

What are the examples of space transportation?

Examples of space transportation include rockets, space shuttles, and spacecraft like the SpaceX Dragon and NASA's Orion capsule. These vehicles are designed to transport humans and cargo to and from space, as well as to various destinations within the solar system.

How rocket takes a turn in space?

It has several engines for maneuvering, which are located on its sides and even on the front part. Short impulse from these engines allow a rocket to change its moving direction, you can check out Youtube videos with Space Shuttle maneuvering to see it yourself.

How did they find Uranus?

Uranus was first observed through a telescope by German-born British astronomer Sir William Herschel on March 13, 1781. Herschel initially thought it was a comet, but further observations confirmed it as a new planet. Its discovery expanded the known boundaries of the solar system and marked a significant milestone in the field of astronomy.

Who was the inventor of starburst?

Starburst candy was invented in the UK in 1960 by a man named Peter Phillips. The candy was originally known as Opal Fruits before being rebranded as Starburst in the US.

Is HAARP the ultimate weapon of mass destruction?

HAARP (the High Frequency Active Auroral Research Program) is a basic science research project. It has attracted all sort of conspiracy theories about its true "purpose" and supposed ill effects on all sorts of things (it has been rumored to cause earthquakes, the 2005 Asian tsunamis, global warming, El Nino, amongst other things).

The reality is that its a BASIC SCIENCE project meant to further understand the composition and nature of the ionosphere, with an eye to possibly producing improvements in radio detection, communications, and sensor performance.

What is a wishing star on ourworld?

In OurWorld, a wishing star is a virtual item that players can collect by playing games, participating in events, or purchasing in-game. Wishing stars can be used to make wishes at the Wishing Well, which may grant players rewards or items for their avatar.

What are the three pointing devices?

The three common pointing devices are the mouse, trackpad, and touchscreen. These devices allow users to interact with a computer by moving a cursor on the screen and clicking on objects or icons.

What is meant by visible observation?

Visible observation refers to the act of physically seeing or watching something with the naked eye. It involves directly looking at an object or phenomenon to gather information or draw conclusions based on what is observable through sight. This type of observation is typically used in scientific research, surveillance, or monitoring activities.

How do satellites affect people?

Satellites provide important services like communication, navigation, weather forecasting, and surveillance. They help people stay connected, access information, and receive emergency assistance. Satellites also facilitate global trade, monitor environmental changes, and contribute to scientific research.

What is the name of the robot in 'Lost in Space'?

It did not have a name, except in insults from Dr Smith, e.g., 'You bubble-headed booby' etc.

Robby and Robert are familiar monikers for Robots- in Forbidden Planet and Steve Canyon, for example, but accurately the Lost In Space robot did not have a name. Tobor is another common handle for Robots as it is the word spelled backwards.

The robot did not have a name, just an identifier, B9.

Robby the Robot is from Forbidden Planet. The same man created them both.

What planes have a continuous light at night?

All aircraft have fixed lights at night. Typically they have a steady white light along with a green light on the right wing and a red light on the left wing.

There are a number of satellite's visible with the naked eye that appear to be a fast moving white light.

The most common of these are the NOAA and the International Space Station (ISS)

Unless it was a search helicopter (police-fire-coastguard)

Why do the undersides of CDs have rainbow colours?

The rainbow-like colors on the undersides of CDs are caused by the interference of light waves as they pass through the thin layers of the CD's surface. The patterns are formed due to the way the layers are structured and reflect light. It's a result of the physics of light interacting with the surface of the CD.

How was vehicle tracking originally used in space?

Well it all started with the war...Nuclear Submarines would navigate underwater but when surfaced would get lost. Not much point of having a lost weapon so they launched Global Positioning Satelites hence GPS. Now there are about 14 satelites doing this. They give you can accurate position within 10 metres. They also used this technique to build the tallest longest sky bridge in france.

How does Newton's Second Law relate to rocket movement?

A rocket in its simplest form is a chamber enclosing a gas under pressure. A small opening at one end of the chamber allows the gas to escape, and in doing so provides a thrust that propels the rocket in the opposite direction. A good example of this is a balloon. Air inside a balloon is compressed by the balloon's rubber walls. The air pushes back so that the inward and outward pressing forces are balanced. When the nozzle is released, air escapes through it and the balloon is propelled in the opposite direction.

When we think of rockets, we rarely think of balloons. Instead, our attention is drawn to the giant vehicles that carry satellites into orbit and spacecraft to the Moon and planets. Nevertheless, there is a strong similarity between the two. The only significant difference is the way the pressurized gas is produced. With space rockets, the gas is produced by burning propellants that can be solid or liquid in form or a combination of the two.

One of the interesting facts about the historical development of rockets is that while rockets and rocket-powered devices have been in use for more than two thousand years, it has been only in the last three hundred years that rocket experimenters have had a scientific basis for understanding how they work.

The science of rocketry began with the publishing of a book in 1687 by the great English scientist Sir Isaac Newton. His book, entitled Philosophiae Naturalis Principia Mathematica, described physical principles in nature. Today, Newton's work is usually just called the Principia. In the Principia, Newton stated three important scientific principles that govern the motion of all objects, whether on Earth or in space. Knowing these principles, now called Newton's Laws of Motion, rocketeers have been able to construct the modern giant rockets of the 20th century such as the Saturn V and the Space Shuttle. Here now, in simple form, are Newton's Laws of Motion.

  1. Objects at rest will stay at rest and objects in motion will stay in motion in a straight line unless acted upon by an unbalanced force.
  2. Force is equal to mass times acceleration.
  3. For every action there is always an opposite and equal reaction.
As will be explained shortly, all three laws are really simple statements of how things move. But with them, precise determinations of rocket performance can be made.

Newton's Second Law

This law of motion is essentially a statement of a mathematical equation. The three parts of the equation are mass (m), acceleration (a), and force (f). Using letters to symbolize each part, the equation can be written as follows:

f = maBy using simple algebra, we can also write the equation two other ways: a = f/mm = f/a

Let's apply this principle to a rocket. Replace the mass of the cannon ball with the mass of the gases being ejected out of the rocket engine. Replace the mass of the cannon with the mass of the rocket moving in the other direction. Force is the pressure created by the controlled explosion taking place inside the rocket's engines. That pressure accelerates the gas one way and the rocket the other.

Some interesting things happen with rockets that don't happen with the cannon and ball in this example. With the cannon and cannon ball, the thrust lasts for just a moment. The thrust for the rocket continues as long as its engines are firing. Furthermore, the mass of the rocket changes during flight. Its mass is the sum of all its parts. Rocket parts includes engines, propellant tanks, payload, control system, and propellants. By far, the largest part of the rocket's mass is its propellants. But that amount constantly changes as the engines fire. That means that the rocket's mass gets smaller during flight. In order for the left side of our equation to remain in balance with the right side, acceleration of the rocket has to increase as its mass decreases. That is why a rocket starts off moving slowly and goes faster and faster as it climbs into space.

Newton's second law of motion is especiaily useful when designing efficient rockets. To enable a rocket to climb into low Earth orbit, it is necessary to achieve a speed, in excess of 28,000 km per hour. A speed of over 40,250 km per hour, called escape velocity, enables a rocket to leave Earth and travel out into deep space. Attaining space flight speeds requires the rocket engine to achieve the greatest action force possible in the shortest time. In other words, the engine must burn a large mass of fuel and push the resulting gas out of the engine as rapidly as possible. Ways of doing this will be described in the nextchapter, practical rocketry..

Newton's second law of motion can be restated in the following way: the greater the mass of rocket fuel burned, and the faster the gas produced can escape the engine, the greater the thrust of the rocket.

Putting Newton's Laws of Motion TogetherAn unbalanced force must be exerted for a rocket to lift off from a launch pad or for a craft in space to change speed or direction (first law). The amount of thrust (force) produced by a rocket engine will be determined by the mass of rocket fuel that is burned and how fast the gas escapes the rocket (second law). The reaction, or motion, of the rocket is equal to and in the opposite direction of the action, or thrust, from the engine (third law).

What is the difference between the spark and arc please?

A spark is formed when the electric field strength exceeds the dielectric field strength of air. Meaning that when an area of space's electronic strength exceeds the area surrounding it, a spark occurs to modulate or evenly distribute the electrical strength.

An Arc occurs when an highly conductive object with a high electrical charge is in the proximity of a highly conductive object with a low electrical charge, allowing the electrical field to travel through an area with lower conductive properties (such as air) to the object which is highly conductive but contains a lower charge than the other object. Rubbing your feet on a carpet and touching someone is a good example of this occurrence.

The difference in a spark and an arc is a spark is a singular occurrence which only needs a single particle to occur and in order to create or induce an Arc, two object are needed.

How much does sky cost?

If your asking about Sky TV, then in the UK there are various packages available, some include TV, Broadband and Phone calls, if you sign up for two years then the instalation and equipment is usually free with a monthly fee of between £18 an £31 depending on the package you select.

What is the name of the Chinese inventor who made the compass?

The Chinese inventor who first created the compass is believed to be Shen Kuo, a polymath and statesman from the Song dynasty. However, the compass as we know it today was further developed and popularized by the Chinese explorer Zheng He during the Ming dynasty.

How will solar technology help astronauts?

Solar technology can provide a renewable and efficient source of power for spacecraft and space missions. By harnessing the energy from the sun, astronauts can generate electricity to power essential systems on board, such as life support, communication, and navigation systems. Solar panels also reduce the reliance on traditional fuel sources, making missions more sustainable and cost-effective.

What is image mosaicing?

Image mosaicing is the process of stitching together multiple images to create a larger, seamless panoramic image. This technique is commonly used in photography and satellite imaging to capture a wider field of view that would not be possible with a single shot. Mosaicing typically involves aligning, blending, and compositing individual images to create a continuous visual representation.

Robby the Robot in lost in space?

This is a flag of convenience. Robby the Robot was one of the (features) of the Forbidden Planet ( which was made entirely indoors- a triumph of trick photography) animal shots like the Tiger were superimposed. The Lost In Space robot was un-named. it did have the cipher B-9 ( obviously a pun on the word benign) It or he was only addressed as Robot. Robby the Robot was somewhat similar mechanically but more flussed- out.

What was invented in the 1700s for communication that allowed people miles apart to communicate instantly?

The telegraph was invented in the 1700s, specifically in the late 1700s and early 1800s. It used electrical signals to transmit messages over long distances, allowing people miles apart to communicate almost instantly.

What are some of the benefits of satellites in everyday life?

Satellites provide services like GPS navigation, weather forecasting, communication, and monitoring of natural disasters. They also enable global internet access and support agriculture, transportation, and emergency response systems. Additionally, satellites play a crucial role in scientific research, such as studying climate change and tracking wildlife.