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good morning

This ratio is defined as the ratio of the volume of the hydrated cement paste to the SUM of volumes of the hydrated cement and of the capillary pores. 2. ... Explanation: POWERS and BROWNYARD have established the relationship between the strength and gel/space ratio.

hope it helps u

FHWA HPC DEFINITION. EIGHT performance CHARACTERISTICS were USED in the definition of HPC to encompass both durability and structural design. The four performance characteristics related to durability are: freeze-thaw RESISTANCE, scaling resistance, abrasion resistance, and chloride ION penetration.

The WATER to cement ratio largely determines the strength and DURABILITY of the concrete when it is cured properly. The w/c ratio refers to the ratio of the weights of water and cement used in the concrete mix. A w/c ratio of 0.4 MEANS that for every 100 lbs of cement used in the concrete, 40 lbs of water is ADDED.

Answer:

Because of the difference between AC and AVC, i.e. AFC. ...

Thus, the AVC CURVE reaches its minimum POINT EARLIER than AC curve as a result of which the minimum point of AC curve lies to the right of that of AVC curve.

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So,ummm.... yeah

so you mean,if you travel at a trillion LIGHT year per second. You will obviously

be travelling REALLY quick .

This was a SENSELESS QUESTION as there is no time given. So assuming time as infinity and applying some theories and COMMON facts -

1 - you will just travel in space to another planet

2- according to some theories you can time travel in future.

3 - you can just go into another dimension.

4 - you can beat the speed at which the universe is expanding and you'll see the end after millions of year.

Very SIMPLE question !!



take the following steps into consideration :-


h = 80 m

now ,

we know that time taken by Free falling body is given by FORMULA => √ 2h/ g

so , T comes out = √2× 80/10

T = 4 SEC

now ,

spalsh herad = 4.2 sec

so ,


actual time => 4.2-4 sec




=> 0.2 sec .



now velocity => distance / time

=> 80m/.2 sec

=> 400m / s


hope it HELP you !!

thanks and all the best .

Significant ERROR is an error which when OCCURS CAUSES a significant DAMAGE to a SYSTEM

Very simple !!

kE => √ p/2m


HENCE , we can SEE that this is QUADRATIC so the possible graph will be parabola .


HOPE it help you !!

thanks

As CENTRIPETAL ACCELERATION is GIVEN by
v²/r
therefore √(r1/r2)=V2/v1
so RATIO will √2:1

Mineral admixture mineral and chemical ADMIXTURES in cross product to MODIFY the properties of concrete such as HEAT of HYDRATION oscillator to RELATED them ,improve workability .

EXPLANATION:

LIGHT WEIGHT is a type of COARSE aggregates that used in the production of lightweight CONCRETE products such as concrete block,structural concrete and pavement.....

Your ANSWER is :-

A HYDRATION reaction is a chemistry reaction in which a substance COMBINE with water .


The products of the reaction between CEMENT and water are termed "hydration products." there are typically four main types: Calcium silicate hydrate: this is the main reaction product and is the main source of CONCRETE strength

Answer:

Creep is time DEPENDENT deformations of CONCRETE under PERMANENT loads (self weight), PT forces and permanent displacement.  When concrete is SUBJECTED to compressive loading it deforms instantaneously.This immediate deformation is called instantaneous STRAIN. Now, if the load is maintained for a considerable period of time, concrete undergoes additional deformations even without any increase in the load.This time-dependent strain is termed as creep

Explanation:

hi

An electrical cell is an "electrical power supply". It CONVERTS stored chemical energy into electrical potential energy, allowing a current to FLOW from the positive TERMINAL to the negative one via an external CIRCUIT. The positive terminal is called a cathode and the negative terminal is called an anode.

M#

Sir Isaac Newton first presented his three laws of motionin the "Principia MATHEMATICA Philosophiae Naturalis" in 1686. His first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its STATE by the action of an external force. This is normally taken as the definition of inertia. The key point here is that if there is no net force resulting from unbalanced FORCES acting on an object (if all the external forces cancel each other out), then the object will maintain a constant velocity. If that velocity is zero, then the object remains at rest. And if an additional external force is APPLIED, the velocity will change because of the force. The amount of the change in velocity is determined by Newton's second law of motion.

There are many excellent examples of Newton's first law involving aerodynamics. The motion of an airplane when the pilot changes the throttle setting of the engine is described by the first law. The motion of a ball falling down through the atmosphere, or a model rocket being launched up into the atmosphere are both examples of Newton's first law. The motion of a kite when the wind changes can also be described by the first law. We have created separate pages which describe each of these examples in more detail to HELP you understand this important physical principle.

Concrete admixtures are of different types and they are as follows:

Water Reducing Admixtures

Retarding Admixtures

Accelerating Admixtures

Air ENTRAINING concrete admixture

Pozzolanic Admixtures

Damp-proofing Admixtures

Gas forming Admixtures

Air detraining Admixtures

Alkali Aggregate EXPANSION Inhibiting Admixtures

Anti-washout Admixtures

Grouting Admixtures

Corrosion Inhibiting Admixtures

Bonding Admixtures

Fungicidal, GERMICIDAL, INSECTICIDAL Admixtures

Coloring Admixtures

Flexural strength, also known as modulus of rupture, or bend strength, or transverse rupture strength is a material property, defined as the stress in a material just before it yields in a flexure test.[1] The transverse bending test is most frequently employed, in which a specimen having either a circular or rectangular cross-section is bent until fracture or yielding using a three point flexural test technique. The flexural strength represents the highest stress experienced within the material at its moment of YIELD. It is measured in terms of stress, here given the symbol {\displaystyle \sigma }

IntroductionEdit



Fig. 1 - Beam of material under bending. Extreme fibers at B (COMPRESSION) and A (tension)



Fig. 2 - Stress distribution across beam

When an object formed of a single material, like a wooden beam or a steel rod, is bent (Fig. 1), it experiences a range of stresses across its depth (Fig. 2). At the edge of the object on the inside of the bend (concave face) the stress will be at its maximum compressive stress value. At the outside of the bend (convex face) the stress will be at its maximum tensile value. These inner and outer edges of the beam or rod are known as the 'extreme fibers'. Most MATERIALS generally fail under tensile stress before they fail under compressive stress, so the maximum tensile stress value that can be sustained before the beam or rod fails is its flexural strength.[citation needed]

Flexural versus tensile strength

The flexural strength would be the same as the tensile strength if the material were homogeneous. In fact, most materials have small or large DEFECTS in them which act to concentrate the stresses locally, effectively causing a localized weakness. When a material is bent only the extreme fibers are at the largest stress so, if those fibers are free from defects, the flexural strength will be controlled by the strength of those intact 'fibers'. However, if the same material was subjected to only tensile forces then all the fibers in the material are at the same stress and failure will initiate when the weakest fiber reaches its limiting tensile stress. Therefore, it is COMMON for flexural strengths to be higher than tensile strengths for the same material. Conversely, a homogeneous material with defects only on its surfaces (e.g., due to scratches) might have a higher tensile strength than flexural strength.

If we don't take into account defects of any kind, it is clear that the material will fail under a bending force which is smaller than the corresponding tensile force. Both of these forces will induce the same failure stress, whose value depends on the strength of the material.

For a rectangular sample, the resulting stress under an axial force is given by the following formula:

{\displaystyle \sigma ={\frac {\digamma }{bd}}}

This stress is not the true stress, since the cross section of the sample is considered to be invariable (engineering stress).

{\displaystyle \digamma } is the axial load (force) at the fracture pointb is widthd is the depth or thickness of the material

The resulting stress for a rectangular sample under a load in a three-point bending setup (Fig. 3) is given by the formula below (see "Measuring flexural strength").

The equation of these two stresses (failure) yields:

{\displaystyle \sigma ={\frac {3FL}{2bd^{2}}}}

Usually, L (length of the support span) is much bigger than d, so the fraction {\displaystyle {\frac {3L}{2d}}} is bigger than one.

Measuring flexural strength



Fig. 3 - Beam under 3 point bending

For a rectangular sample under a load in a three-point bending setup (Fig. 3):

{\displaystyle \sigma ={\frac {3FL}{2bd^{2}}}}F is the load (force) at the fracture point (N)L is the length of the support spanb is widthd is thickness

For a rectangular sample under a load in a four-point bending setup where the loading span is one-third of the support span:

{\displaystyle \sigma ={\frac {FL}{bd^{2}}}}F is the load (force) at the fracture pointL is the length of the support (outer) spanb is widthd is thickness

For the 4 pt bend setup, if the loading span is 1/2 of the support span (i.e. Li = 1/2 L in Fig. 4):

{\displaystyle \sigma ={\frac {3FL}{4bd^{2}}}}

If the loading span is neither 1/3 nor 1/2 the support span for the 4 pt bend setup (Fig. 4):


Fig. 4 - Beam under 4 point bending

{\displaystyle \sigma ={\frac {3F(L-L_{i})}{2bd^{2}}}}Li is the length of the loading (inner) span

FACTORS AFFECTING WORKABILITY OF CONCRETE

A concrete is SAID to be workable if it is easily transported, placed, compacted and finished without any segregation. Workability is a property of freshly MIXED concrete, and a concrete is a mixture of cement, aggregate, water & admixture. Due to this all the properties of concrete, whether in fresh state or hardened state, is AFFECTED by these ingredients and their proportions.

Factors Affecting Workability

The single most important nature of workable concrete is its lubricating nature. If a concrete shows more lubricating nature, then it will have the following advantages, such as

It will exhibit little internal friction between particle and particle

It will overcome the frictional RESISTANCE offered by the surface of the FORMWORK and reinforcement contained in the concrete

It can be consolidated with minimum compacting effort.

The factors which help concrete to have more lubricating effect to reduce internal friction for easy compaction are given below.

Water content

Aggregate/cement ratio

Size of aggregate

Shape of aggregate

Grading of aggregate

Surface texture of aggregate

Use of admixture

Curing is the maintaining of an adequate moisture CONTENT and temperature in concrete at early ages so that it can develop properties the mixture was designed to achieve. Curing begins IMMEDIATELY after placement and FINISHING so that the concrete may develop the desired STRENGTH and du- rability.

The SPRING is HORIZONTAL

Your ANSWER is :-


WEIGHT of OBJECT on EARTH is 9.8N


So, it's weight on MOON is


9.8/6 = 1.633N

because weight on moon of an object is 1/6 of the weight of same object on Earth

What is UR QUESTION ??.

Heya mate, Here is ur answer

RESISTANCE of first wire = 4.25 ohms.

We know that resistance = RHO × l/a

where rho = resistivity of the material

l= length

a= area of cross section

When length is increased four times,

length becomes = 4 l

When area of cross section is decreased 3 times, so area of cross section becomes

a/3

So, new resistance

















So, new resistance is 51 OHM

===============

WARM regards

@Laughterqueen

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Essays
Biology
Materials For HIGH Density Concrete Production

Disclaimer: This work has been submitted by a student. This is not an example of the work written by our professional academic writers. You can view samples of our professional work here.

Any OPINIONS, findings, conclusions or recommendations expressed in this material are those of the AUTHORS and do not necessarily reflect the views of UK Essays.

Published: Mon, 14 May 2018

High density concrete can only be manufactured by USING various high density natural or man-made aggregates. High density concrete can be used for structural and/or specialised construction purposes. The main use of HDC is in the nuclear industry as radiation shielding. Special care should be taken to the specific type of aggregates used and type of cements combined in the concrete mix.

High density concrete (HDC) consists of concrete with a density higher than normal 2300 to 2550 kg/m³ and is used for special purposes such as radiation shielding, counter weights, ballasts, safe walls and safe roofs.

F=ma
[a=∆v/∆t]
200N= 1200* ∆v/ 3
200N×3/1200=∆v
=> 0.5 m/s is the CHANGE in VELOCITY

This is very EASY to FIND on GOOGLE

Scheduling is a method that is USED to distribute valuable computing RESOURCES, usually processor TIME, bandwidth and memory, to the various PROCESSES, threads, data flows and APPLICATIONS that need them.

When light PASSES from a RARER to a denser medium, the WAVELENGTH DECREASES.

It BENDS TOWARDS the CONDUCTOR

Heat Transfer coefficient for FORCED convection is different than natural convection.

Forced Convection:

1. Dimensionless heat transfer coefficient is represented by Nusselt number. Nusselt number is in general function of Reynolds and Prandtl numbers. For high temperature gradient, it may become function of thermophysical PROPERTY of the fluid.

Nusselt number (Nu) is heat transfer coefficient (H) multiply by reference length (L) and DIVIDED by thermal conductivity of the working fluid (k), i.e., Nu=hL/k.

Reynolds number (Re) is average velocity of flow (V) multiply by length scale (L) divided by kinematic viscosity (nu), i.e. Re=VL/nu

Prandtl number (Pr) is the ratio between kinematic viscosity (nu) divided by thermal diffusivity (a), i.e., Pr=nu/a (which is thermophyical property of the fluid).

then heat transfer coefficient is function of (k/L, Re and Pr). The function itself depends on the flow conditions (laminar or turbulent) and geometry of flow direct and geometry of the solid surface.

Natural convection:

Just REPLACE Re by Rayleigh number ( which gravity* delta T, L^3/(nu a), all above argument is valid.

In simple words, h is complex function of fluid property (not material property), flow conditions, geometry of the flow.

Nature of Manufacturing Process

The type of manufacturing process is the main DETERMINANT of plant buildings. The floor load, head space, bay size etc., depend on the type of machines and equipment to be used.

2. Plant Layout

The arrangement of machines, service centres and office EXERCISE considerable influence on the design and construction of plant buildings. In fact, labour pattern should be determined first and the building should be just a shell around this design. However, provision for flexibility should be MADE to meet the future needs.

3. Space Requirements

The size of plant buildings depends upon space requirements for the flow and storage of materials, for location of machines, for service centres and for movement of employees. The height of the ceiling depends upon the type of equipment used. Use of overhead conveyors and tall equipment may require high roofs. But special structures and additional costs may be involved. Pits may be dug, if possible, to accommodate all equipment.

4. Material Handling

Ease in material handling assists in the reduction of manufacturing cycle time, avoids production bottlenecks and reduces material handling cost. Cranes, conveyor belts hoists, etc., are increasingly used for easy handling of materials. A reduction in the number of columns and the maintenance of the ceiling at a desirable height are significant to the use of material handling equipment. It is evident that the requirements of efficient material handling equipment AFFECT the building design. CONVERSELY, the characteristics of the factory building affect a firm’s ability to use this equipment efficiently.

Hey MATE!

__________________________________________________________

FOR THE EQUILIBRIUM OF DIPOLE MOMENT NET FORCE AS WELL AS TORQUE MUST BE ZERO...

AND ANGLE BETWEEN THE MOMENT MUST BE 0°....

#PHOENIX

ACCELERATION DUE TO GRAVITY MEANS THE ACCELERATION OF A BODY FREE FALLING TOWARDS THE EARTH. G IS A CONSTANT FORCE OF ATTRACTION BETWEEN OBJECTS ...

F=Gm1m2/r2

g=Gm(object)*m(earth)/r(distance between the object and CENTER of the earth)2

IMPORTANT DEPARTMENT:-
•Emergency department
•Cardiology Intensive CARE unit
•Paediatric intensive care unit
•Neonatal intensive care unit
•Cardiovascular intensive care •NeurologyOncologyObstetrics and •gynaecology
•colloquially
•maternity ward
•Pathology department


IMPORTANT FACILITIES:-
• Hospitality FUNCTIONS, such as food SERVICE and housekeeping.
•Fundamental inpatient care or bed-related function.
• Hygiene.
• Technology.

ANSWER:

Newton's FORMULA for velocity of SOUND in gas is .....

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With INCREASE in TEMPERATURE RESISTANCE INCREASES

The SPEED of SOUND at the normal temperature of 20°C is 343 m/s

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Where is the FIGURE and what to FIND if to find TENSION then the tension is 10 N

The UNITS of fundamental physical QUANTITIES are called fundamental units. They are LENGTH, MASS and time. These units can neither be derivedfrom one another nor can be RESOLVED into any other units.

Assuming bulbs are of same type , Bulb consuming more Power should GROW brighter...

Bulbs are in series , current is same in both bulbs , Power is current square multplied by RESISTANCE , since resistance of 100 W is more , it SHALL glow brighter.

hope it helped.

Pavement surface characteristics. For safe and comfortable driving FOUR aspects of the pavement surface are important; the friction between the wheels and the pavement surface, smoothness of the ROAD surface, the light REFLECTION characteristics of the top of pavement surface, and DRAINAGE to water.

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