Answer:
999999999999999999999
bending stress distribution is a.rectangle b.parabolic c.curve d.i section
(6) effects of urbanization on the urban hydrology
Answer:
123456
Explanation:
A comparison of parking fee changed at 4 randomly selected parking areas were 12 15 17 and 20 pesos per car find the mean the variance of the parking fees
The calculated mean value is 16. The sum of all values divided by the total number of values determines the mean (also known as the arithmetic mean, which differs from the geometric mean) of a dataset.
The term "average" is frequently used to describe this measure of central tendency. By dividing the sum of the given numbers by the entire number of numbers, the mean—the average of the given numbers—is determined. Mean is equal to (Sum of All Observations/Total Observations).
Mean=12+15+17+20/4
=16
Special road signage designate 10-cent zones. At the beginning and finish of the zone, there are signs. There is one space available for as long as three or four hours each day. Only specific hours of the day are subject to the 10 cent rate. There may be a Blue Zone in locations where paid parking is not (yet) in effect.
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4. which of the following is not a form of conventional machining?
The option "Additive Manufacturing" is not a form of conventional machining. Conventional machining involves the removal of material to shape it, while additive manufacturing builds layers of material to create a final product.
Conventional machining refers to the use of machines to cut, shape, or form a material into a specific shape. The different types of conventional machining include turning, milling, drilling, and grinding. However, one of the options listed below is not a form of conventional machining. The option that is not a form of conventional machining is "Additive Manufacturing."
Additive manufacturing is not a form of conventional machining. This process involves the use of machines to add layers of material on top of each other to create a final product. It is a process that has gained popularity in recent years due to its ability to create complex shapes and structures that would be difficult or impossible to produce with conventional machining techniques.
Conventional machining, on the other hand, is the use of machines to cut, shape, or form a material into a specific shape. This process involves the removal of material from a larger piece to create a desired shape. The different types of conventional machining include turning, milling, drilling, and grinding.
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A cylindrical tank is required to contain a gage pressure 670 kPakPa . The tank is to be made of A516 grade 60 steel with a maximum allowable normal stress of 150 MPaMPa . If the inner diameter of the tank is 2 mm , what is the minimum thickness, tt, of the wall
Answer:
The minimum thickness t of the wall is 0.00446 mm
Explanation:
Solution
Given that
Pressure =670kPa = 0.670
σ allowable normal stress = 150 MPa
Inner diameter = 2mm
Steel = A516 grade 60
Now,
Since the hoop stress is twice the longitudinal stress, the cylindrical tank is more likely to fail from the hoop stress.
Thus
σ allowable = σₙ = pμ/t
=p (d/2)
150 MPa =0.670MPa * 2/2/t
=0.67/t
t=0.67/150
t =0.00446 mm
to attain maximum power delivered to a load, what value of load impedance is required if the load can have any complex value?
The maximum power transfer theorem is a theorem in electrical engineering that states that the maximum power transfer from a power source to a load occurs when the load impedance is the complex conjugate of the source impedance. This is only true if the source impedance and the load impedance are both complex numbers.
To attain maximum power delivered to a load, the value of load impedance required if the load can have any complex value is equal to the complex conjugate of the source impedance. This statement is based on the maximum power transfer theorem .To clarify, impedance is the resistance of an electrical circuit to the flow of an alternating current. It can be represented by a complex number with a real part and an imaginary part. Furthermore, a complex conjugate is a complex number that has the same real part but the opposite imaginary part. In other words, if the impedance is a + bi, its complex conjugate would be a - bi.What is the value of load impedance required for maximum power transfer?The value of load impedance required for maximum power transfer is the complex conjugate of the source impedance. This is true for both resistive and reactive loads. If the load impedance is not equal to the complex conjugate of the source impedance, the power transferred to the load will be less than the maximum possible value. Therefore, the load impedance should be carefully selected to ensure that maximum power transfer is achieved.The formula for calculating the value of the load impedance required for maximum power transfer is given as follows:ZL = Z*S where ZL is the load impedance, Z is the source impedance, and S is the complex conjugate of Z.For such more question on impedance
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the hub and blades of a utility scale wind turbine from the rotor, which converts wind energy into roational energy thsat turns electric generator
A utility-scale wind turbine's hub and blades make up the rotor, which transforms green energy into centrifugal energy that powers an electrical generator.
Describe a turbine How does it function?The blades of a turbine, which resemble propellers and function similarly to an airplane wing, capture the wind's energy. A compartment of low-pressure air develops on one edge of the blade when the wind blows. The blade is subsequently drawn toward the low-pressure air pocket, which turns the rotor.
What two types of turbines are there?Francis and Propeller reaction turbines are the two most popular varieties. Reaction turbines include kinetic turbines as well. The runner of a propeller turbine typically has three to five blades.
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A platinum resistance temperature detector has a resistance of 100.00 V at 0°C, 138.50 V at 100°C and 175.83 V at 200°C. What will be the nonlinearity error in °C at 100°C if the detector is assumed to have a linear relationship between 0 and 200°C?
Answer:
about 1.54 °C
Explanation:
The error will be the difference between the temperature interpreted from the resistance value and the actual temperature. The linear equation used to translate the resistance reading to temperature will be ...
T = (200 -0)/(175.83 -100.00)(R -100.00)
T ≈ 2.637479(R -100)
At the temperature of 100°C, the resistance value of 138.50 will be interpreted to be a temperature of ...
T = 2.637479(138.50 -100) ≈ 101.543°C
This represents an error of 1.543°C relative to the actual temperature.
Determine E°(cell) for the half-reaction In³⁺(aq) + 3 e⁻ → In(s).2ln(s) + 6H+(aq) ----> 2ln3+(aq) + 3H2(g)E°= +0.34 V
The standard cell potential, E°(cell), for the given half-reaction is +0.34 V.
The cell reaction is:
In³⁺(aq) + 3 e⁻ → In(s) E° = ?
We can use the Nernst equation to find the standard cell potential:
E°(cell) = E°(cathode) - E°(anode)
where E°(cathode) is the reduction potential and E°(anode) is the oxidation potential. For the reduction half-reaction:
In³⁺(aq) + 3 e⁻ → In(s) E° = ?
The standard reduction potential, E°(reduction), can be found in a standard reduction potential table, such as this one:
Looking up In³⁺ in the table, we find E°(reduction) = -0.34 V.
Therefore, the standard cell potential is:
E°(cell) = E°(cathode) - E°(anode) = 0.00 V - (-0.34 V) = +0.34 V
So, E°(cell) for the given half-reaction is +0.34 V.
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1 poli The H screw on this carburetor is for the setting idlle mixture of fuel and air adjusting the high speed fuel air mixture O adjusting the high speed setting of the engine adjusting the throttle position of the carburetor
The H screw on a carburetor is used for adjusting the high-speed fuel-air mixture of the engine. This screw is responsible for controlling the amount of fuel and air that enters the engine when it is running at a high speed.
It is important to set this screw correctly in order to ensure optimal engine performance and prevent damage to the engine. The idle mixture is adjusted using a different screw, typically labeled as the L screw. The throttle position of the carburetor is also important to consider when adjusting the engine speed. A carburetor is a device that mixes air and fuel in the proper ratio for combustion in an internal combustion engine. It is used in older gasoline-powered vehicles and small engines such as lawnmowers, chainsaws, and motorcycles. The carburetor works by regulating the flow of air and fuel into the engine. It consists of a series of tubes, valves, and chambers that control the amount of fuel and air that enter the engine. Carburetors have been largely replaced by fuel injection systems, which are more efficient and reliable, but they still have some applications in small engines and vintage vehicles. Carburetors require regular maintenance and tuning to ensure proper engine performance and fuel efficiency.
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A driver is traveling at 90 km/h down a 3% grade on good, wet pavement. An accident
investigation team noted that braking skid marks started 75m before a parked car was
hit at an estimated 45 km/h. Ignoring air resistance, calculate the theoretical friction
coefficient.
Answer:
0.35
Explanation:
We resolve the component of the weight of the car along and perpendicular to the grade. We have mgsinФ and mgcosФ where Ф = angle of grade.
Now, the frictional force f = μN = μmgcosФ where μ = coefficient of friction
So, the net force along the grade is F = mgsinФ - μmgcosФ.
The work done by this force moving a distance, d along the grade is
W = (mgsinФ - μmgcosФ)d
This work equals the change in kinetic energy of the car. So ΔK = 1/2m(v₂² - v₁²) = W = (mgsinФ - μmgcosФ)d
1/2m(v₂² - v₁²) = (mgsinФ - μmgcosФ)d
1/2(v₂² - v₁²) = (gsinФ - μgcosФ)d
(v₂² - v₁²)/2d = (gsinФ - μgcosФ)
dividing through by gcosФ, we have
(v₂² - v₁²)/2dgcosФ = (gsinФ/gcosФ) - μgcosФ/gcosФ
(v₂² - v₁²)/2dgcosФ = tanФ - μ
μ = tanФ - (v₂² - v₁²)/2dgcosФ
given that tanФ = 3% = 3/100 and 1 + tan²Ф = 1/cos²Ф, cosФ = 1/(√1 + tan²Ф) = 1/(√1 + (3/100)²) = 1/(√1 + (9/10000)) = 1/(√10000 + 9/10000) = 1/√(10009/10000) = 100/√10009 = 100/100.05 = 0.9995.
Also, given that v₁ = 90 km/h = 90 × 1000/3600 m/s = 25 m/s and v₂ = 45 km/h = 45 × 1000/3600 m/s = 12.5 m/s, d = 75 m and g = 9.8 m/s².
So, substituting the values of the variables into the equation, we have
μ = tanФ - (v₂² - v₁²)/2dgcosФ
μ = 3/100 - ((12.5 m/s)² - (25 m/s)²)/(2 × 75 m × 9.8 m/s² × 0.9995)
μ = 3/100 - ((156.25 m/s)² - (625 m/s)²)/1,469.265 m²/s²
μ = 3/100 - (-468.75 m²/s²)/1,469.265 m²/s²
μ = 3/100 + 468.75 m²/s²/1,469.265 m²/s²
μ = 0.03 + 0.32
μ = 0.35
So, theoretical friction coefficient is 0.35
The part of a circuit that carries the flow of electrons is referred to as the?
Conductor
Electrostatic Field
Dieletric
Insulator
Answer:
Conductor
Explanation:
Current is carried by a conductor.
__
The purpose of a dielectric and/or insulator is to prevent current flow. An electrostatic field may set up the conditions for current flow, but it carries no current itself.
what are advantages of using sinusoidal Voltages
Answer:
The advantages of using a pure sine wave for your appliances and machinery are as follows: Reduces electrical noise in your machinery.
translates to no TV lines and no sound system hum.
Cooking in microwaves is quicker.
Explanation:
The smoothest signal is a sine wave, and sine waves are the basis of all functions.
Every other continuous periodic function is a basis function, which means that it can be described in terms of sines and cosines.
For instance, using the Fourier series, I can describe the fundamental Sinusoidal frequency and its multiples in terms of the triangle and square waves.
why can the change in the angle of rotation, , of the polarized light alone not be used to monitor the consumption of sucrose when breaking sucrose down into glucose and fructose?
The change in the angle of rotation, of the polarized light alone cannot be used to monitor the consumption of sucrose when breaking sucrose down into glucose and fructose because the angle of rotation is dependent on other factors besides the concentration of sucrose.
These factors include the thickness of the sample, the wavelength of the polarized light, and the temperature of the sample. Therefore, simply measuring the change in the angle of rotation of the polarized light would not give an accurate measurement of the consumption of sucrose.
A more reliable method for monitoring the consumption of sucrose would be to use a monitor that measures the concentration of glucose and fructose directly.
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B/ Evaluate e^(πi/2)
You get a result immediately from Euler's formula:
e ^(i π/2) = cos(π/2) + i sin(π/2) = 0 + i * 1 = i
A 1.3-m2 black surface at 135 0C is losing heat to the surrounding air at 27 0C by convection with a convection heat transfer coefficient of 20W/m2. 0C, and by radiation to the surrounding surfaces at 20 0C. What is the total rate of heat loss from the surface in watts
Heat loss from a 1.3-m2 black surface at 1350C to the surrounding air at 27 0C by convection with a convection heat transfer coefficient of 20W/m2.
0C, and by radiation to the surrounding surfaces at 20 0C can be determined as follows:Total rate of heat loss from the surface in watts is given by the sum of the rate of heat loss due to convection and radiation from the surfaceMathematically,H = Hconv + Hrad...[1]The rate of heat loss due to convection is given by the relation,Hconv = h× A × (Ts - Ta)...[2]where, h is the convection heat transfer coefficient, A is the area of the surface, Ts is the surface temperature and Ta is the surrounding fluid (air) temperature.
Substituting the given values in eq[2], we haveHconv = 20× 1.3× (135 - 27) = 3434 WNow, rate of heat loss due to radiation is given by the relation,Hrad = ε × σ × A × (Ts4 - Tsur4)...[3]where, ε is the emissivity of the surface, σ is the Stefan-Boltzmann constant, Ts is the surface temperature and Tsur is the average surrounding surface temperature.Substituting the given values in eq[3], we haveHrad = 1× 5.67×10-8× 1.3× (135 + 273)4 × (135 + 273 + 20)4 = 345.15 WThus, substituting the values of Hconv and Hrad in eq[1], we get the total rate of heat loss from the surface in watts asH = Hconv + Hrad= 3434 + 345.15 = 3780.15 WTherefore, the total rate of heat loss from the surface is 3780.15 W.
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HC and CO are high and Co2 and O2 are low. This could be caused by a ____?
A) rich mixture
B) lean mixture
C) defective ignition component
D) clogged EGR passage
The scenario described, where HC (hydrocarbons) and CO (carbon monoxide) levels are high while CO2 (carbon dioxide) and O2 (oxygen) levels are low, is typically caused by a rich mixture.
A rich mixture refers to an air-fuel mixture in which the fuel component is higher than the ideal stoichiometric ratio (the perfect balance of air and fuel for efficient combustion). When the mixture is rich, there is an excess of fuel relative to the available oxygen. As a result, incomplete combustion occurs, leading to higher levels of HC and CO emissions.
Excessive fuel can be caused by various factors such as a malfunctioning fuel injection system, a faulty oxygen sensor, a clogged air filter, or issues with the engine's electronic control system. These conditions can disrupt the proper air-fuel ratio, leading to a rich mixture and the observed increase in HC and CO emissions.
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what is the horsepower rating on the bmw m3 in north america?A) 473 horsepowerB) 463 horsepowerC) 450 horsepowerD) 470 horsepower
A) 473 horsepower rating on the bmw m3 in north america.
BMW's S58 twin-turbo 3.0-liter inline-six, which in standard form generates 473 horsepower and 406 lb-ft of torque, powers the M3. It is connected to either a six-speed manual transmission or an eight-speed automatic transmission that only drives the rear wheels. According to BMW, the M3 will reach 60 mph in 4.1 seconds and reach a top speed of 180 mph.
Engine output increases to 503 horsepower and 479 lb-ft of torque in the M3 Competition. BMW's xDrive AWD technology is now provided, whilst the Competition is only offered with an automatic transmission. Considering the car's capabilities, fuel economy isn't too poor; regardless of the transmission selected, it receives an EPA rating of 16/23 mpg city/highway.
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Consider the following declaration that appears in a class other than TimeRecord.
TimeRecord [ ] timeCards = new TimeRecord [100] ;Assume that timeCards has been initialized with TimeRecord objects. Consider the following code segment that is intended to compute the total of all the times stored in timeCards.
which of the following can be used to replace / * missing expression * / so that the code segment will work as intended? responses timecards [ k ] .advance ( ) timecards [ k ] .advance ( ) total
The missing expression can be replaced with timeCards[k].getTime() in order for the code segment to work as intended.
In the given code segment, the goal is to compute the total of all the times stored in the timeCards array. To achieve this, we need to access the time value for each TimeRecord object in the array. By using timeCards[k].getTime(), we can retrieve the time value from the TimeRecord object at index k. This expression will return the time value, allowing us to include it in the computation of the total.
By iterating through the timeCards array and summing up the individual time values, we can accurately calculate the total time stored in the timeCards array.
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You may turn left on a light that is green, however, you must yield the right-of-way if other traffic is approaching from the opposite direction
What is polarized electrical receptacle used for
Answer:
they are used for electrical currents so that they can flow along the appropriate wires in the circuit
Explanation:
To ensure safety and reliable electrical connections, polarized electrical receptacles are employed.
It is frequently seen in both residential and commercial structures and has two slots, one of which is broader than the other.
In a polarised outlet, the neutral slot is broader than the hot slot, which is smaller. To ensure that electrical appliances or gadgets are connected correctly and consistently, this design was created.
By ensuring a steady flow of energy through the instrument, polarization lowers the chance of electric shock.
Thus, it's crucial to remember that not all electrical appliances need polarized plugs.
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cheg for the following five spreadsheet functions, (a) write the values of the engineering economy symbols p, f, a, i, and n, using a ? for the symbol that is to be determined, and (b) state whether the displayed answer will have a positive sign, a nega¬tive sign, or it can’t be determined from the entries.
a) Future Worth (FW)Symbolic representation:
\(F= P(A/F, i%, n)\)
F represents the future worth, P represents the present worth, A represents the equivalent annual worth, i represents the interest rate, and n represents the number of years.
(b) Present Worth (PW)Symbolic representation:
\(P = F(P/F, i%, n)\)
Here, P represents the present worth, F represents the future worth, A represents the equivalent annual worth, i represents the interest rate, and n represents the number of years.
(c) Annual Worth (AW)Symbolic representation:
\(A = P(A/P, i%, n)\)
Here, A represents the equivalent annual worth, P represents the present worth, i represents the interest rate, and n represents the number of years.
The sign of the displayed answer will depend on the nature of the present worth.
(d) Future Worth Gradient (FWG)Symbolic representation:
\(F = P(G/F, i%, n)\)
Here, F represents the future worth, P represents the present worth, G represents the future worth gradient, i represents the interest rate, and n represents the number of years.
(e) Present Worth Gradient (PWG)Symbolic representation:
\(P = F(G/P, i%, n)\)
Here, P represents the present worth, F represents the future worth, G represents the future worth gradient, i represents the interest rate, and n represents the number of years.
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Discuss the exciton roles in silicon solar cell
Excitons play a crucial role in silicon solar cells and are involved in several processes that contribute to the generation of electricity. Here are some key roles of excitons in silicon solar cells:
1. Absorption of Photons: When photons from sunlight strike the silicon material of a solar cell, they can be absorbed by silicon atoms, promoting an electron from the valence band to the conduction band. This process creates an exciton—a bound electron-hole pair.
2. Exciton Diffusion: After absorption, excitons can diffuse through the silicon material, moving towards the region of the solar cell where charge separation occurs. This diffusion process allows excitons to reach the vicinity of the p-n junction, where the separation of charges takes place.
3. Exciton Dissociation: At the p-n junction of a silicon solar cell, excitons can undergo dissociation. The electric field created by the junction separates the electron and hole of the exciton, allowing them to move freely in opposite directions as charge carriers.
4. Electron and Hole Transport: Once the exciton is dissociated, the free electron and hole can move independently within the solar cell. They are transported through the silicon material to the respective electrodes, creating an electric current that can be harnessed for external use.
5. Recombination: Excitons can also undergo recombination, where the electron and hole recombine, releasing energy in the form of light or heat. Recombination is undesirable in solar cells as it reduces the overall efficiency of the device.
To enhance the efficiency of silicon solar cells, various strategies are employed to minimize exciton recombination and improve exciton dissociation and charge carrier transport. These include the use of anti-reflection coatings, surface passivation techniques, and optimization of the device structure.
Overall, excitons play a vital role in the absorption and conversion of sunlight into electrical energy in silicon solar cells. Understanding and controlling exciton dynamics are essential for improving the performance of solar cells and advancing the field of photovoltaics.
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hich performance tool would a technician use first to see if a computer has enough hardware resources when a particular application executes?
The first performance tool a technician would use to check if a computer has sufficient hardware resources for a specific application is a resource monitor.
A resource monitor is the ideal tool for a technician to assess hardware resource utilization on a computer. It provides real-time information about CPU usage, memory consumption, disk activity, and network traffic. By analyzing these metrics while the particular application is executing, the technician can determine if the computer has enough CPU power, memory, and disk space to handle the application's requirements.
If the resource monitor shows high CPU usage, excessive memory consumption, or heavy disk activity, it may indicate that the computer is struggling to meet the demands of the application. The technician can then consider upgrading the hardware or optimizing system settings to ensure smooth performance.
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A 3.7 g mass is released from rest at C which has a height of 1.1 m above the base of a loop-the-loop and a radius of 0.2 m . The acceleration of gravity is 9.8 m/s 2 . 1.1 m 0.2 m B D C A 3.7 g Find the normal force pressing on the track at A, where A is at the same level as the center of the loop. Answer in units of N.
Answer:
Normal force = 0.326N
Explanation:
Given that:
mass released from rest at C = 3.7 g = 3.7 × 10⁻³ kg
height of the mass = 1.1 m
radius = 0.2 m
acceleration due to gravity = 9.8 m/s²
We are to determine the normal force pressing on the track at A.
To to that;
Let consider the conservation of energy relation; which says:
mgh = mgr + 1/2 mv²
gh = gr + 1/2 v²
gh - gr = 1/2v²
g(h-r) = 1/2v²
v² = 2g(h-r)
However; the normal force will result to a centripetal force; as such, using the relation
N =mv²/r
replacing the value for v² = 2g(h-r) in the above relation; we have:
Normal force = 2mg(h-r)/r
Normal force = 2 × 3.7 × 10⁻³ × 9.8 ( 1.1 - 0.2 )/ 0.2
Normal force = 0.065268/0.2
Normal force = 0.32634 N
Normal force = 0.326N
4. On wet roads, the chance of hydroplaning increases with the increase of speed.
True
False
Answer:
The answer to the question is True
On wet roads, the chance of hydroplaning increases with the increase of speed. Thus, the given statement is true.
During rainy weather, roads may become slippery and difficult to drive on. Slippery roads may also arise as a result of snow or ice. The fact that the road surface has less traction than normal is what makes it slippery. On slippery roads, it is recommended that drivers slow down to reduce the risk of skidding, sliding, or losing control of their cars, especially when taking turns.
Drivers should also increase their following distance and avoid abrupt braking or accelerating. Drivers should not drive faster than 25 mph on slippery roads, and they should not increase their speed to avoid hydroplaning. Instead, drivers should slow down.
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Which sentence with an introductory phrase is punctuated correctly?
True or false It is legal to pass in Florida when approaching within 100 feet of or traversing any railroad crossing grade croead
If chestnut hair (E) is dominant over black hair (e), can two horses with black hair produce an offspring with chestnut hair? Explain your answer.
Answer:
No, the offspring of two black horses cannot have chestnut hair. Since the black hair allele is recessive, both parents have to be hz recessive and do not carry the dominant chestnut hair allele. The only allele the parents can pass back to their offspring is the black allele.
Explanation:
Edg. 2022
Answer: The offspring of two black horses cannot have chestnut hair. Since the black hair allele is recessive, both parents have to be his recessive and do not carry the dominant chestnut hair allele. The only allele the parents can pass back to their offspring is the black allele.
Explanation:
The denity of a certain type of jet fuel i 775 kg/m3. Determine it pecific gravity and pecific weight
The correct answer is Specific weight: w = [weight ÷ volume] = [9N ÷ 0.001m³] = 9000N/m³Density: w = [ × g] Where, g = acceleration due to gravity = 9.81m/sec². Specific gravity: G = [density of liquid ÷ density of water] As you know, The density of water = 1000kg/m³.
The density of a substance is divided by the density of water at 4 degrees Celsius to determine its specific gravity. The density of the substance and the density of the water must be represented in the same units for the calculation.distinguishes While specific weight has dimensions, specific gravity is a dimensionless number. The gravitational field has no effect on a material's specific gravity, but it does have an effect on a material's specific weight. A substance's "Specific Gravity" is determined by dividing its mass by the mass of an equivalent volume of water at the same pressure and temperature.
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