Why do some people see better than others?
Differences in visual acuity can be influenced by factors such as genetics, age, underlying health conditions, and environmental factors. Some individuals may also have a higher number of cone cells in their retinas, leading to better color perception and visual acuity. Overall, variations in visual abilities can stem from a combination of these factors.
Astroturf is made by extruding plastic (typically polyethylene) through a series of molds to create synthetic grass fibers. These fibers are then tufted into a backing material, usually made of polyester, to create the artificial turf surface. Various additional layers may be added for stability, cushioning, and drainage.
What Three things we need to have a shadow?
In order to have a shadow, you need a source of light, an object to block that light, and a surface on which the shadow is cast. When light is obstructed by an object, it creates a shadow on the surface opposite the light source.
What space words start with W?
The process is conservation of momentum. Kinetic energy from the faster particle at least partially transferred to the slower particle. Since the internal energy of a fixed mass is directly related to the kinnetic energy of the particles making up the mass (lower temperature means lower kinetic energy of the molecules of the mass) and the energy moves from the the faster molecules to the slower ones, it qualifies as heat - which is defined as the movement of energy driven by a temperature gradient.
What event marks the beginning of spring and in what Hemisphere?
The spring equinox marks the beginning of spring. This is a date where night and day are exactly equal. In the northern hemisphere, this day falls on or around March 21st. In the southern hemisphere, this day falls on or around September 21st.
What causes Aurora to be visible?
1. Due to the burst of Solar flares, radioactive particles are produced
2. Hence, with the burst, the solar wind carries the particles away
3. Then When those particles reach near the earth's magnetosphere, they are deflected and send to the poles
4. Then those particles collide with the atoms of gases present on the atmosphere
5. Then corresponding to the particles collision with the atoms, their color are produced
6. By the quantum leaps of the atoms after coliding with the charged particles, the kinetic energy of atom is changed to visible light
Written by: Rohan Vaidya
Subsidence inversion is a meteorological term. They occur when a large mass of warm air enters an area trapping cooler air beneath.
How do you know a object's speed and velocity?
Velocity = Delta-x / Delta-t, where x is position, t is time, and "Delta" is the "Change in" operator.
Velocity is a vector, so I probably should have written x as x, or x-arrow, or some other notation to indicate it was a vector quantity, but putting an arrow hat on something is a little difficult to do here, and just making it bold is kind of subtle and could be missed.
Speed is the magnitude of the velocity vector.
How does the northern lights work?
This occures when when highly charged electrons from the solar wind interact with elements in the earth's atmosphere. Solar winds stream away from the sun at speeds of about 1 million miles per hour. When they reach the earth, some 40 hours after leaving the sun, they follow the lines of magnetic force generated by the earth's core and flow through the magnetosphere, a teardrop-shaped area of highly charged electrical and magnetic fields. The color of the aurora depends on which atom is struck, and the altitude of the meeting.
If they're combined this means this means that there are all different kinds of altitude and nitrogen/oxygen mix. They go on an 11 year cycle and the next predited time is in 2011 or 2012, which is this year or next year. This is what I learned on my trip to Alaska for my 16th birthday. I hope that this can help. :)
Sunspots sit on the suns what?
Sunspots sit on the sun's photosphere. The photosphere is the surface of the sun, and sunspots are dark regions on it that are visible. The photosphere's average temperature is about 5800 degrees Kelvin.
What is the average temperature of the flame of the candle?
Depending on the wax, and the concentrations of water of oxygen in the air, somewhere between 1,200 degrees and 1,700 degrees Celsius.
The heat capacity and conductivity of air and the exhaust products of combustion, however, are both very low. In practice, candle flames do not seem very hot (much like metal feels colder than wood at room temperature, though they are the same temperature).
The outer core of the candle flame is light blue -- 1670 K (1400 °C). That is the hottest part of the flame. The color inside the flame becomes yellow, orange and finally red. The further you reach to the center of the flame, the lower the temperature will be. The red portion is around 1070 K (800 °C). The reason there is this variation in a candle's flame color is because air convection pulls the warmer gasses upwards.
Is a solid that separates from a solution and generally settles to the bottom of the container?
When we mix water and sand, the sand being heavier settles to the bottom of the mixture. This process is called sedimentation and it is used for water purification. The sand or the impurities are called the sediment.
When the solid sediment in a solution. Then the solid is called precipitate and the phenomena so occurred is called precipitation.
What is the most seen constellation?
Any of the circumpolar constellations. Most common: The Big Dipper (Ursa Major), Cassiopea, Cepheus, the Little Dipper (Ursa Minor). This is because these constllations can be seen year-round, and others only appear in certain seasons. (i.e. Orion constellation can only be seen in the night sky during winter.)
What are the three variables in a scientific experiment?
There are 2 variables and they are independent and dependant.
What is the resistance force when a wedge of an axle splits a log?
The resistance force is the log. It trys to stop the wedge of the axe. The effort force of the swinging axe helps it break through the log, breaking through its resistance.
How do astronauts breathe on the space station?
They breathe artificial "air" that is almost the same as the air on Earth. It is made up of 21% oxygen and 78% nitrogen similar to the air we breathe and it is at a pressure of 14.7psi which is the same as the atmospheric pressure on earth.
What part of a cell is like a energy storage?
It all depends what you mean by "stores".
In the short term, energy can be stored as ATP (Adenosine TriPhosphate). This is an immediate source of energy for cells and is use and recycled rapidly.
In the medium term, glucose can be considered as a method of 'storing' energy.
Again, if the cell has plenty of glucose, it can be quickly used to create ATP if the cells requires more energy than is available as stored ATP.
In the long term, some cells (or the liver in the human body) can join glucose together to form glycogen. It can then be stored so that if the cell begins to run out of ATP AND Glucose, it will start to break up the Glycogen into Glucose and use this to obtain ATP.
Technically lipids and some other macromolecules (eg proteins) can also be a store of energy as long as they can be converted to glucose.
How many rockets have been in space?
As of 2021, over 9,000 launches have placed roughly 6,000 satellites into orbit around Earth. This indicates that there have been thousands of rockets launched into space over the years for various purposes, including satellite deployment, crewed missions, and scientific exploration.
Why do students at school have to study Science if we don't want to become a scientist?
Studying science helps develop critical thinking skills, problem-solving abilities, and a better understanding of the world around us. It also provides a foundation for a wide range of careers beyond just becoming a scientist.
The study of the sun is known as heliophysics. It involves observing and understanding the sun's behavior, solar phenomena, solar wind, and its effects on the solar system and beyond. Scientists use a variety of tools, such as satellites and ground-based observatories, to study the sun.
What do molecules bounce around in?
Bouncing molecules are typical of a gas. Gas can be found pretty much everywhere on the surface of the Earth since we have an atmosphere. So gas molecules are bouncing around in our vicinity, in our rooms, bottles, boxes, you name it.
Why is dissolving hot chocolate powder in boiling water a example n of a physical change?
It is a physical change because the boiling water will turn into steam (process called gas), and in reverse it will turn into water again (process called condensation). It will be the same substance all the time
What uses the same principle as a hot air balloon?
A blimp or airship uses the same principle as a hot air balloon, relying on the difference in density between the air inside the balloon (or envelope) and the surrounding air to generate lift. Both rely on the concept of buoyancy to stay aloft.