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The roughness of a metal surface is typically measured in units of micrometers (µm), or sometimes in Ra values as per ISO standards. These metrics help quantify the deviations from an ideal surface profile, indicating the smoothness of the metal surface. Advanced techniques like profilometers or interferometers are commonly used for precise measurements.
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What is the degree f surface smoothness?
Surface smoothness is typically measured in Ra (Average Roughness) or RMS (Root Mean Square) for engineering applications. These measurements give an indication of the fine details of a surface profile and are expressed in micrometers or inches. The smaller the Ra or RMS value, the smoother the surface.
Who discovered the value for acceleration of gravity?
The value for acceleration of gravity was discovered by Sir Isaac Newton in the late 17th century. He determined that the acceleration due to gravity near the surface of the Earth is approximately 9.81 m/s^2.
Why for a particular metal electrons are emitted only when the frequency of the incident radiation is greater than a certain value?
Electrons are emitted from a metal surface when the energy of the incident photons is great enough to overcome the work function of the metal. This minimum energy required is equivalent to a certain threshold frequency, known as the threshold frequency. Electrons can only be emitted when the frequency of the incident radiation is greater than this threshold frequency because lower frequency photons do not possess enough energy to overcome the work function and release electrons from the metal surface.
What doesnot cause the height of mercury column to vary?
A change in the material of the container holding the mercury does not cause the height of the mercury column to vary. The height of the mercury column is determined by the atmospheric pressure acting on the surface of the mercury in the container.
At what altitude above the earth surface the value of 'g' reduces to half of its value at the surface?
The gravitational acceleration, g, decreases with altitude according to the inverse square law. At an altitude equal to the radius of the Earth (about 6371 km), the value of g would reduce to half of its surface value. This is because the gravitational attraction between the Earth and an object weakens as the distance between them increases.
What is the degree f surface smoothness?
Surface smoothness is typically measured in Ra (Average Roughness) or RMS (Root Mean Square) for engineering applications. These measurements give an indication of the fine details of a surface profile and are expressed in micrometers or inches. The smaller the Ra or RMS value, the smoother the surface.
What determines the value of metal?
Metal value is determined by the purity of the metal. It is a commodity whose price depends on supply and demand.
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If you buy a coin made of gold or silver, its value is usually determined by the weight of the metal.
What is the value of a good or service is determined by?
Value is determined by the demand and the supply
How did people determine the value of gold?
The value of gold was originally determined by its rarity, durability, and malleability. Over time, it became a standard form of currency due to its intrinsic value as a precious metal and its usefulness for making jewelry and other goods. Today, the value of gold is determined by market demand and supply dynamics, as well as factors such as geopolitical events and economic trends.
Is gold expensive metal?
Yes, gold is considered an expensive metal due to its scarcity, desirability, and various industrial and jewelry uses. Its value is determined by factors such as demand, economic conditions, and global events.
Is is true that the frequency of photons must be larger than a certain minimum value in order to eject electrons from the metal?
Yes, that is true. This minimum frequency is called the threshold frequency and is determined by the work function of the material. Photons with frequencies lower than the threshold frequency do not carry enough energy to eject electrons from the metal surface, even if the intensity of light is high.
How is the purity of metal determined by using Matthiessen's rule?
according to the Mathiessan's rule, the overalll temp dependant mobility is determined by the lattice vibration (phonon) scattering limited mobility (µL)and scattering by impurities( µI)... as 1/µ=1/µL+ 1/µI....... the lowest value among these two determines the overall mobility... so if the value of µL is low, it means the metal is pure...
What is value of polynomial?
The value of a polynomial is determined by that of the variable.
Why resistor size does not varies with its value?
A: A resistor size is determined by the usage or its power dissipation. the bigger the size the more power it can dissipate due to the extra surface. SIZE is a function of power dissipation and has nothing to do with its value
What is the value of a 1956 US half dollar?
1956 is a common date for Franklin halves so unless it is in top condition its value will be determined mostly by its metal content. Franklin halves contain about 1/3 of a troy ounce of silver so their minimum value will be about 1/3 of the metal's current price, which changes every day.
What is determined or estimated amount of something?
It is a determined value or an estimate.
