Thickness Definition and 328 Threads

hello! how do we calculate the thickness of insulation (wool) material to be used for a boiler. thanks

A double-slit experiment is set up using a helium-neon laser (lambda =633nm) . Then a very thin piece of glass ( n=1.50 ) is placed over one of the slits. Afterward, the central point on the screen is occupied by what had been the m = 15.0 dark fringe. How thick is the glass? I really need...

I have this weird question where the thickness of the material is given in \frac{grams}{cm^2}. And it's not wrong. What does it mean ?

I need to determine the minimum wall thickness for 1018 CRS for a knife blade. I know the moment, max deflection, greatest safe load, yield strength, MOE, length, density, current wall thickness, etc. However, I can not find a general formula connecting yield strength to wall thickness...

I am really confused. Would you please tell me what the turbulent boundary layer thickness is on a flat plate? There is a well-known Schlichting formula in the previous editions of his book “boundary layer theory”, which is: \delta = 0.37 X Re^{-0.2} But actually I could not find this...

Homework Statement A thin film of oil (n = 1.23) is located on a smooth, wet pavement. When viewed perpendicular to the pavement, the film reflects most strongly red light at 640 nm and reflects no light at 569 nm. How thick is the oil film? Homework Equations...

Hi, Please guide me in calculating the shear stress value for a Annular plate with constant thickness.. My inputs are Outer radius, Inner radius, Load acting thickness. and the material properties. I need to calculate the Shear stress value at the inner edge. The constraints are the...

Is it possible to slice a metal to the thickness of... ...an atom?

I have a sheet of aluminum that has a mass of 0.69g, length of 10.2cm and width of 7.5cm. I need to find the volume in cm3 and the thickness in cm. What is the formula to do this? The density of aluminum is 2.699 g/cm3...do I need to use that in the formula or is that irrelevant when calculating...

hi friends, I'm an engineer, & recently I face a problem to calculate the thickness of the insulating material in the inlet gas duct of Waste heat recovery type boiler. Actually, we are executing a project, that the waste coke oven gas is used for generating steam. for this we introduce a gas...

The rod shall be replaced by a tube (wall thickness s = da=12).if da is the outer diameter,then the inner diameter is it di=da-da/12 ??

A 8.0g bullet traveling at 400m/s passes through a heavy block of wood in 4.0x10^-4s, emerging with a velocity of 100m/s. Ignore the motion of the wood. 1) What is the force exerted by the block on the bullet? 2) What is the force exerted by tbe bullet on the block? 3) How thick is the...

An aluminum tube with an outside diameter of 1,000 in. will be used to support a 10-kip load. If the axial stress in the member must be limited to 30 ksi T or C, determine the wall thickness required for the tube. I used tau=shearing stress/area therefore 30(pie times 1-d)=10 but that is not...

Imagine a infinitly long cylintrical dielectic shell of thickness n. show that the electric field everywhere inside such shell is zero. What is the electirc field within the thickness of the shell?

Hi! I am doing research on TiAlSiN coatings. The coatings are multilayers of crystalline TiN and amorphous (Al,Si)N. The thickness of each layer is estimated about some nano-meters. The question is How can I measure the thickness of each layer? and What measurement of method is the best...

A five-gear assembly is put together with spacers between the gears. The mean thicnkess of the gears is 5.03 cm with a standard ev. of .008. the mean thickness of the spacers is .140 cm with a standard dev. of .005. Find the mean and standard deviation of the thickness of the assembled units...

1. Basically, we have coaxial cable with an inner wire of radius a, perfectly conducting, straight and infinitely long, with radius a, surrounded by an outer hollow cylinder, also made from perfectly conducting material, having inner radius b and outer radius c. The hollow cylinder functions...

Hi I have a question on an assignment that I don't know how to do. I need to find the thickness of a sheet of metal. I have the density, mass, volume, and area of the metal. If someone could please help me i would appreciate it.

Hi all! I would like to know how, in workshop practice, one would measure the tooth thickness and pitch of a spur gear?

This question comes from my Grade 11 Univ. Physics Teacher. Problem: To as many significant figures as you can justify, determine the thickness of the aluminium foil. 1. Purpose 2. Procedure 3. Calculations (Significant Figures) 4. Conclucion Now I know that the density of...

Hi, I generally understand interference and Newton's ring/Young's double slit experiments, but I can't find the answer to a pretty simple question: When two glass plates are placed together and their is a gap of thickness "t", contructive and destructive interference leads to interference...

I was going though one of those aquariums where you can walk through a plastic tube and can see the sea creatures up close without getting wet. How could I find an approximate thickness of the tube just with my eye and something I can bring, like a flashlight, ruler, protractor, or whatever...

1. One of the two slits in a double-slit interference arrangement is closed with a thin strip of glass of refractive index 1.4 and the other slit is closed with a thin strip of transparent plastic with refractive index 1.7. On doing this, the centre of the interference pattern on the screen is...

hey, I am doing a survey for my bike alarm. How thick is the biggest frames on your bike, and how thick is the smallest frame? a reply would be very helpful. Thanks

I'm confused by something my book says. For reference, here is the relevant text: Figure 18-5b shows an oscillating element of air of cross-sectional area A and thickness \Delta x, with its center displaced from its equilibrium position by a distance s. From Eq. 18-2 we can write, for the...

Hi, I'm currently doing an experiment to investigate the effect that changing the thickness of insulation has on cooling curves. However, I do need some theory to compare the results to. Does anyone know anywhere that I could find such information, or actually know themselves what effect...

Does anyone know the thickness of a gold coating that would give me 50% transmittance and 50% reflectance? Thanks, Simon

I don't even know where to start with this question! Two coherent sources are traveling as shown below. Find the minimum thickness of the glass (n=1.51) for the waves to be out of phase at the screen