The Difference Between

A heat conductor allows heat to flow easily through it due to the movement of free electrons, such as metals. An insulator, on the other hand, inhibits the flow of heat due to the lack of free electrons or tight bonding between atoms, such as rubber or wood.

Variable motion refers to motion that changes speed or direction over time. This can include acceleration, deceleration, or changes in velocity. Objects experiencing variable motion have varying rates of displacement at different points in time.

Synthesis and single displacement reactions both involve the formation of new substances. In a synthesis reaction, two or more substances combine to form a single compound, while in a single displacement reaction, an element reacts with a compound to form a new element and compound.

Real image can be caught on a screen. But virtual cannot be caugtht so

Real image is formed due to convergence of rays but in case of virtual there are only diverging rays and so they appear to diverge from one point where virtual image is located

But both real and virtual could be seen by human eyes.

Same way real object would definitely give out diverging rays

But virtual object is considered as converging rays are assumed to come from such virtual object

The term "volumen" typically refers to the volume of an object or space, which is the amount of three-dimensional space it occupies. It can also refer to a bound collection of written or printed sheets of paper.

solution is transparent whereas suspension is not transparent.

particles in solution are of size less than 100nm.but particles of suspension are of size more than 1000nm.solution is homogeneous mixture whereas suspension is heterogeneous mixture. solution doesn't exhibit Tyndall effect or brownian movement.but suspension exhibits it....

Yes, the stopper stops/delays an attack forming in the middle third. The sweeper prevents the ball from entering the middle part of the field in the defensive third. See definition at www.soccerhelp.com.

Conduction is the transfer of heat through direct contact between objects or substances. Convection, on the other hand, involves the transfer of heat through the movement of fluids (liquids or gases). In conduction, heat is transferred through a stationary medium, while in convection, the medium itself moves to transfer heat.

A bog is a wetland type that accumulates acidic peat, a deposit of dead plant material. A marsh is a type of wetland, featuring grasses, rushes, reeds, typhas, sedges, cat tails, and other herbaceous plants (possibly with low-growing woody plants) in a context of shallow water. A marsh is different from a swamp, which has a greater proportion of open water surface, which is generally deeper than a marsh A bog can be referred to as a swamp while a marsh technically can not. Also the acidic waters of a bog distinguish it as being different than a marsh.

Clinical thermometers are made to be used in a hospital to accurately determine body temperature. They are often digital. Lab thermometers are made of metal or glass and usually don't give you an accurate reading as much as a "ball park." A clinical thermometer may have mercury but lab thermometers usually have alcohol .

White gold is an alloy made by mixing gold with white metals like nickel or palladium, giving it a silver appearance. Platinum, on the other hand, is a naturally white metal that is denser and more durable than white gold. Platinum is also more rare and therefore more expensive than white gold.

Speed is a scalar quantity that measures how fast an object is moving without specifying the direction. Velocity, on the other hand, is a vector quantity that includes both the speed and direction of motion. In other words, velocity gives information about both how fast something is moving and in what direction.

If a body is at rest, it experiences no acceleration. From what frame of reference are you observing the object? You are in a closed elevator in freefall toward earth. You have a tennis ball with you, hanging freely and motionless in front of you (disregarding the drag from air). From your frame of reference it is motionless. I am observing you and the tennis ball from the earth's surface. From my frame of reference, you and the ball are accelerating at 9.8 meters per second per second. Neither of us is wrong. But it won't go so well for you and the ball unless I beam you out, which I surely do.

Because the molecules in the hot air are more spread out, allowing water to easily form within the gaps of the molecules.

Cold air is more dense and does not allow water to form easily between the molecules.

Density is the mass of a substance per unit volume, often measured in g/cm3 or kg/m3. Concentration, on the other hand, is the amount of a solute present in a solvent, usually expressed as a ratio or percentage. Density is a physical property, while concentration is a measure of the composition of a mixture.

The "SL" in dB SL stands for "Sensation Level". The "HL" in dB HL stands for "Hearing Level". The difference between them is that dB SL is based on the hearing ability of an individual test subject, and dB HL is based on the hearing ability of an entire population of test subjects.

0 dB SL is the minimum level at which the test subject can hear a stimulus, usually a tone pip. The actual level will vary with frequency. If we refer to a level of, say, 40 dB SL, we mean a sound that is 40 decibels above a test subject's threshold of hearing.

The dB HL scale is the mean dB SL of a large population (theoretically the world-population) of *normal hearing* people. They measured frequency-specific thresholds for alot of people, and averaged them to give the dB HL scale.

Finally, dB nHL stands for "normalised hearing level". This is the same concept as dB HL, except the number of test subjects contributing to the average is smaller. It is standard practice for a Hearing Clinic to establish their own dB nHL scale based on all the normal-hearing test subjects they have had access to. This allows a clinic to ensure that the scale they use is correctly calibrated to their test equipment.

Answer: SI units are based on m, kg, s, ... CGS units are based upon cm, g, s, ... SI stands for "Systeme Internationale d'Unites" and is now used generally instead of CGS by scientists, and in many countries also by engineers, though in some areas notably the USA, engineers may still use pounds weight and feet.

Basically there are seven SI units: 1. Length-metre (or meter in USA), 2. Mass-kilogram, 3. Time-second, 4. Temperature interval-Kelvin, 5. Electric current-ampere, 6. Amount of substance-mole, 7. Luminous intensity-candela.

From these seven basics, other units are derived for practical use. For example Force is measured in Newtons, where 1 Newton is the force required to accelerate a mass of 1 kilogram at 1 metre per second squared. Energy, ie work or heat, is defined as Joules, where 1 Joule is the work done by a force of 1 Newton in a distance of 1 metre. Power, which is the rate of doing work, is then simply Joules per second. Pressure would be defined as Newtons per square metre, this is given the name Pascal. This is a rather small unit, so the Bar is invented, 1Bar=10 to the power 5 Pascals. This is conveniently close to normal atmospheric pressure at sea level, and meteorologists use millibars, thus one thousand millibars=1 Bar.

The difference with CGS is largely due to using metre instead of centimetre, and kilogram instead of gram. But there are also other differences due to definitions, such as in using Joules for heat instead of calories. Many people find calories or kilocalories easier to think in, as you can envisage a kilogram (1 litre) of water being heated 1 degree Celsius, whilst with Joules you have to use the mechanical equivalent of heat, ie 4.2 Joules/Calorie.

The topic could occupy several lecture hours! There is a summary in the back of Chamber's English Dictionary which is worth looking at if you have a copy handy, or there are plenty of more thorough references available.

GHz is a frequency used in radio frequency and computer proccessor speed. It has a frequency of 109. GB is short for Gigabyte. It is equal to approximately 10243 or equal to approximately 1024 megabytes.

Equatorial surface gravity: 0.58 m/s²

(0.059 gees) aka. just over 1\2 of our's

Because its density is lower. At constant pressure, a given volume of hot air thus weighs less than the same volume containing colder air. ---------------------------------------- remark: This can be easily seen from the equation for ideal gases p*V = n*R*T, with p: pressure V: volume n: number of particles within the given volume R: ideal gas constant T: Temperature

Synchronous AC motors run at a speed fixed by the input line frequency. Typically 60 Hz in the USA. Run a clock with the sync motor from the USA in England and it runs slow because they use 50Hz.

Asynchronous motors run at whatever free-run speed they feel like, and slow under load. A DC wound hand-drill is such a motor, runs pretty fast till you start drilling, then it slows down.

A synchronous motor will develop maximum power at its' designed speed, try to slow it down and it puts out more torque. Slow it down by overload, it doesn't create more power, it just creates more heat.

An Async motor creates highest torque at stall speed, least torque as it approaches maximum speed.

In January of 2000 Dr. Danielle S. McNamara submitted a preliminary report to the NASA Ames Research Center on photoreading. McNamara enrolled in a PhotoReading workshop under the tutelage of an expert who, in three years, had trained about 150 individuals in PhotoReading. The trainee spent two months learning the PhotoReading technique. The two participants named in the study were "(a) the PhotoReading trainee who participated ina two-day photoreading workshop, and (b) the photoreading expert who provided the PhotoReading workshop." (McNamara 4). The study design included two normal pretests, followed by parallel versions of five reading tests employing the PhotoReading technique. One test was the Nelson Reading Comprehension Test (forms G and H) and the Verbal Reasoning section of the MCAT. The other two tests were generated by the experimenter. This study tests only difficult expository texts because "PhotoReading has been claimed to be particularly effective for this type of text" (McNamara 5). The texts used here involve subjects like physiology, perception, and biology. Each question from these texts were generated around a single idea or sentence within each text. According to McNamara "The information in the text that is targeted by the question generally requires little prior knowledge and little active processing of the text to understand" (McNamara 6). The results of the study generally follow the pattern that PhotoReading and normal reading require a similar amount of time to complete. For example, the expert scored 37 of 38 possible questions correct with normal reading taking 19.43 minutes to do so. Then the expert took a similar test after PhotoReading the passage and scored a 38 out of 38 possible questions correct in a time of 18.13 minutes. McNamara took the same test, and scored a 92% both times. However, photoreading took 21.30 minutes whereas regular reading took 15.80 minutes. These results show that photoreading can work, but they do not support the 25,000 words per minute claims. In a text about perception, the expert took 8.82 minutes to read the text using normal reading. Then, he photoread the text in 0.87 minutes and proceeded to read the text for another 8.12 minutes before he completed the process. In the text involving normal reading he answered three questions correctly out of eight. Photoreading, he scored only 1 out of 8 correctly. These results do not support assertions that Photoreading help one study faster and with greater comprehension than with ordinary reading techniques. To conclude the study, McNamara noted that, "In terms of words per minute (wpm) spent reading, there was no difference between normal reading (M = 114 wpm) and PhotoReading (M=112 wpm)" (10). So why is it that so many people tout photoreading? In her conclusion, McNamara states that, "One aspect of the PhotoReading technique is that it leaves the reader with a false sense of confidence." (12).