Answer:
Both Technician A and B are correct.
Explanation: A brake lathe is a special tool used to improve or work on the surface of brake pads it helps to smoothen the surface.
Brake lathe has been found to be very effective in removing rusts in rotors and unevenness in the brake pad surfaces in order to ensure the efficiency and effectiveness of the brake system of a vehicle. Hence, a brake lathe helps to make brake rotor surface as smooth as possible.
A pumping test has determined the aquifer transmissivity to be 2000 ft2/day and the storage coefficient to be 0.0002. Your client requires an average water supply of 500.000 gpd. You plan a 1-in diameter well. 200 days of continuous withdrawal from storage is targeted each year. If the entrance losses to the well total 2 feet at what depth would you set the pump
Answer:
rqbynqnyeuenqrqununrqruqrun
Select the correct answer.
Which type of material functions as heat shields in space shuttles?
ОА. .
elastomers
OB.
metals
O c.
semiconductors
D.
plastics
E.
composites
C. Semiconductors.
They are made up of what is called a porous silicon material that is very light and extremely heat resistant.
Answer:
composites
Explanation:
help
A 1D signal of up to 20,000 samples is considered.
Using data structures specific to simple chained lists, determine the number of zero passes of the signal. The signal goes through 0 if it changes its sign from one sample to another. 0 is not considered a sign change.
The use of STL is prohibited. Any data structure in the STL or function in the STL used will lead to a 0-point solution.
The use of vectors is prohibited. Any static (T V [N]) or dynamic (T * V = new T [N]) vector structure used will lead to the 0 score of the solution.
Input data:
N number of samples signal samples
Output data:
the number of passes through zero
Example:
Input data:
10
1 3 -2 -6 4 10 1 -5 4 1 Output data:
4
Explanation:
There are 4 sign changes between two consecutive samples:
3 -2 -> sign change (first zero crossing)
-6 4 -> sign change (second zero crossing)
1 -5 -> sign change (third zero crossing)
-5 4 -> sign change (fourth zero crossing)
Answer:
er of passes through zero
Example:
Input data:
10
1 3 -2 -6 4 10 1 -5 4 1 Output data:
4
Explanation:
There are 4 sign changes between two consecutive samples:
3 -2 -> sign change (first zero crossing)
-6 4 -> sign change (second zero crossing)
Explanation:
er of passes through zero
Example:
Input data:
10
1 3 -2 -6 4 10 1 -5 4 1 Output data:
4
Explanation:
There are 4 sign changes between two consecutive samples:
3 -2 -> sign change (first zero crossing)
-6 4 -> sign change (second zero crossing)er of passes through zero
Example:
Input data:
10
1 3 -2 -6 4 10 1 -5 4 1 Output data:
4
Explanation:
There are 4 sign changes between two consecutive samples:
3 -2 -> sign change (first zero crossing)
-6 4 -> sign change (second zero crossing)er of passes through zero
Example:
Input data:
10
1 3 -2 -6 4 10 1 -5 4 1 Output data:
4
Explanation:
There are 4 sign changes between two consecutive samples:
3 -2 -> sign change (first zero crossing)
-6 4 -> sign change (second zero crossing)er of passes through zero
Example:
Input data:
10
1 3 -2 -6 4 10 1 -5 4 1 Output data:
4
Explanation:
There are 4 sign changes between two consecutive samples:
3 -2 -> sign change (first zero crossing)
-6 4 -> sign change (second zero crossing)
HOW TO CALCULATE MARGINAL RATE
Answer:
Divide the difference in tax by the amount of income from the investment, and you'll get the economic marginal tax rate from investing. Most people refer to marginal tax rates as being identical to tax brackets.
hope this helps
have a good day :)
Explanation:
____ are intended to help provide the correct amount of ventilation and also help reduce cooling costs by allowing outside air to be introduced to the conditioned space when conditions are correct
The flow between two infinitely flat parallel plates displays a parabolic profile, and is called plane Poiseulle flow.
a. True
b. False
Answer:
a. True
Explanation:
The study of fluids in a state of rest or in motion and the forces involved in it is called fluid mechanics. Fluid mechanics has a wide range of applications in the field of mechanical engineering as well as civil engineering.
When we study the flow of fluid between any two flat plates that is indefinitely flat and is parallel, the flow of the fluid is known as plane Poiseulle flow. The profile of a plane Poiseulle flow is parabolic.
The velocity profile of a plane Poiseulle flow is :
[tex]$\frac{u(y)}{U_{max}}=1-\left(\frac{2y}{h}\right)^2$[/tex]
Thus the answer is TRUE.
A single fixed pulley is used to lift a load of 400N by the application of an effort of 480N in 10s through a vertical height of 5m. Determine the V.R, M.A and efficiency of the machine.
Answer:
(a) the velocity ratio of the machine (V.R) = 1
(b) The mechanical advantage of the machine (M.A) = 0.833
(c) The efficiency of the machine (E) = 83.3 %
Explanation:
Given;
load lifted by the pulley, L = 400 N
effort applied in lifting the, E = 480 N
distance moved by the effort, d = 5 m
(a) the velocity ratio of the machine (V.R);
since the effort applied moved downwards through a distance of d, the load will also move upwards through an equal distance 'd'.
V.R = distance moved by effort / distance moved by the load
V.R = 5/5 = 1
(b) The mechanical advantage of the machine (M.A);
M.A = L/E
M.A = 400 / 480
M.A = 0.833
(c) The efficiency of the machine (E);
[tex]E = \frac{M.A}{V.R} \times 100\%\\\\E = 0.833 \ \times \ 100\%\\\\ E = 83.3 \ \%[/tex]
to produce cooling the refrigerant must
Answer:
The compressor
Explanation:
to compress the low-pressure dry gas refrigerant from the evaporator and raise its pressure and temperature to that of the condenser, to produce flow around the system.
Air enters a turbine with a stagnation pressure of 900 kPa and a stagnation temperature of 658K, and it is expanded to a stagnation pressure of 100 kPa. Assuming the expansion process is isentropic, determine the turbine power for a mass flow rate of 0.04 kg/s. What does the sign of the calculated power indicate
Answer:
12.332 KW
The positive sign indicates work done by the system ( Turbine )
Explanation:
Stagnation pressure( P1 ) = 900 kPa
Stagnation temperature ( T1 ) = 658K
Expanded stagnation pressure ( P2 ) = 100 kPa
Expansion process is Isentropic, also assume steady state condition
mass flow rate ( m ) = 0.04 kg/s
Calculate the Turbine power
Assuming a steady state condition
( p1 / p2 )^(r-1/r) = ( T1 / T2 )
= (900 / 100)^(1.4-1/1.4) = ( 658 / T2 )
= ( 9 )^0.285 = 658 / T2
∴ T2 = 351.22 K
Finally Turbine Power / power developed can be calculated as
Wt = mCp ( T1 - T2 )
= 0.04 * 1.005 ( 658 - 351.22 )
= 12.332 KW
The positive sign indicates work done by the system ( Turbine )
Explain in your own words how standard form can be used to better communicate information in certain scientific or engineering contexts.
Answer:
Technical communication is a means to convey scientific, engineering, or other technical information.[1] Individuals in a variety of contexts and with varied professional credentials engage in technical communication. Some individuals are designated as technical communicators or technical writers. These individuals use a set of methods to research, document, and present technical processes or products. Technical communicators may put the information they capture into paper documents, web pages, computer-based training, digitally stored text, audio, video, and other media. The Society for Technical Communication defines the field as any form of communication that focuses on technical or specialized topics, communicates specifically by using technology or provides instructions on how to do something.[2][3] More succinctly, the Institute of Scientific and Technical Communicators defines technical communication as factual communication, usually about products and services.[4] The European Association for Technical Communication briefly defines technical communication as "the process of defining, creating and delivering information products for the safe, efficient and effective use of products (technical systems, software, services)".[5]
Whatever the definition of technical communication, the overarching goal of the practice is to create easily accessible information for a specific audience.[6]
IV. An annealed copper strip 9 inches wide and 2.2 inches thick, is rolled to its maximum possible draft in one pass. The following properties of annealed copper are given: strength coefficient is 90,000 psi; true strain at the onset of non-uniform deformation is 0.45; and, engineering strain at yield is 0.11. The coefficient of friction between strip and roll is 0.2. The roll radius is 14inches and the rolls rotate at 150 rpm. Calculate the roll-strip contact length. Calculate the absolute value of thetrue strain that the strip undergoes in this operation. Determine the average true stress of the strip in theroll gap. Calculate the roll force. Calculate the horsepower required.
Answer:
13.9357 horse power
Explanation:
Annealed copper
Given :
Width, b = 9 inches
Thickness, [tex]$h_0=2.2$[/tex] inches
K= 90,000 Psi
μ = 0.2, R = 14 inches, N = 150 rpm
For the maximum possible draft in one pass,
[tex]$\Delta h = H_0-h_f=\mu^2R$[/tex]
[tex]$=0.2^2 \times 14 = 0.56$[/tex] inches
[tex]$h_f = 2.2 - 0.56$[/tex]
= 1.64 inches
Roll strip contact length (L) = [tex]$\sqrt{R(h_0-h_f)}$[/tex]
[tex]$=\sqrt{14 \times 0.56}$[/tex]
= 2.8 inches
Absolute value of true strain, [tex]$\epsilon_T$[/tex]
[tex]$\epsilon_T=\ln \left(\frac{2.2}{1.64}\right) = 0.2937$[/tex]
Average true stress, [tex]$\overline{\gamma}=\frac{K\sum_f}{1+n}= 31305.56$[/tex] Psi
Roll force, [tex]$L \times b \times \overline{\gamma} = 2.8 \times 9 \times 31305.56$[/tex]
= 788,900 lb
For SI units,
Power = [tex]$\frac{2 \pi FLN}{60}$[/tex]
[tex]$=\frac{2 \pi 788900\times 2.8\times 150}{60\times 44.25\times 12}$[/tex]
= 10399.81168 W
Horse power = 13.9357
Air exits the compressor and enters the combustor of a gas turbine engine with a flow rate of 84 kg/s at 800 K. Ethane (C2H6) at 298 K enters the combustor to create an overall equivalence ratio of 0.62.
Required:
a. Determine the mass flow rate of fuel, in kg/s.
b. Determine the heat release rate, in kW.
c. Determine the mass fraction of oxygen in the products.
d. Determine the adiabatic flame temperature.
Answer:
answer 8 sorry i just need the points
Explanation:
Pie charts should have no more than eight segments. True or False?
Answer:
Explanation:
Pie charts generally should have no more than eight segments.
A two-bus power system is interconnected by one transmission line. Bus 1 is a generator bus with specified terminal voltage magnitude of |V1| pu. We desire to solve the power flow problem for this system.
a. Identify the variables in the solution vector assuming Bus 2 is a load bus with specified demand as PD pu and QD pu.
b. Identify the variables in the solution vector assuming Bus 2 is a PV bus.
Answer:
a) | v2 | , β2 ( load, bus voltage at bus 2 )
p1 , q1 ( slack, bus power at bus 1 )
b) q2 , β2
p1 and q1 ( slack, bus power at bus 1 )
Explanation:
Attached below is a schematic representation of the solution
a) Identify the variables in the solution vector assume Bus 2 is a load bus
The specified parameters are ; P2 and q2
while | v2 | and β2 are not specified
given that bus 2 is a load bus, bus 1 is a slack bus with ; | v1 | and β1 been specified while p1 and q1 are not specified
Hence the variables in the solution
= | v2 | , β2 ( load, bus voltage at bus 2 )
p1 , q1 ( slack, bus power at bus 1 )
b) Identify the variables in the solution vector ( assume Bus 2 is a PV bus )
specified at Bus 2 are ; | p2 | , | v2 |
unspecified : q2 , β2
Bus 1 ( still a slack bus )
specified parameter : | v1 | and β1
unspecified : p1 and q1
Hence the variables in the solution
= q2 , β2
p1 and q1 ( slack, bus power at bus 1 )
A clay sample was consolidated in a triaxial test under an all-around conning pressure of 15 lb/in.2. The sample was then loaded to failure in undrained condition by applying an additional axial stress of 22 lb/in.2. A pore water pressure sensor recorded an excess pore pressure of (Dud)f 5 29 lb/in.2 at failure. Determine the undrained and drained friction angles for the soil
Answer:
- the undrained friction angles for the soil is 25.02°
- the drained friction angles for the soil is 18.3°
Explanation:
Given the data in the question;
First we determine the major principle stress using the express;
σ₁ = σ₃ + (Δσ[tex]_d[/tex] )[tex]_f[/tex]
where σ₃ is the total minor principle stress at failure ( 15 lb/in² )
(Δσ[tex]_d[/tex] )[tex]_f[/tex] is the deviator stress ( -9 lb/in² )
so
σ₁ = 15 lb/in² + 22 lb/in²
σ₁ = 37 lb/in²
Now, we calculate the consolidated-undrained friction angle as follows;
∅ = sin⁻¹[ (σ₁ - σ₃ ) / ( σ₁ + σ₃ ) ]
∅ = sin⁻¹[ (37 - 15 ) / ( 37 + 15 ) ]
∅ = sin⁻¹[ 22 / 52 ]
∅ = sin⁻¹[ 0.423 ]
∅ = 25.02°
Therefore, the undrained friction angles for the soil is 25.02°
- The drained friction angles for the soil;
∅ = sin⁻¹[ (σ₁ - σ₃ ) / ( σ₁ + σ₃ - 2(Δσ[tex]_d[/tex] )[tex]_f[/tex] ) ]
so we substitute
∅ = sin⁻¹[ (37 - 15 ) / ( 37 + 15 - 2( -9 ) ]
∅ = sin⁻¹[ 22 / ( 37 + 15 + 18 ) ]
∅ = sin⁻¹[ 22 / 70 ]
∅ = sin⁻¹[ 0.314 ]
∅ = 18.3°
Therefore, drained friction angles for the soil is 18.3°
HELP! It’s for an architecture class on PLATO
Select the correct answer.
Which association maintains the International Building Code?
A. NFPA
B. ICC
C. EPA
D. DOJ
Answer:
ICC
Explanation:
The International Building Code (IBC) is a model building code developed by the International Code Council (ICC). It has been adopted for use as a base code standard by most jurisdictions in the United States.
what happens to the recievng end voltage as the load on a transmission line is increased if the load has a lagging power facotr
Answer:
The receiving end Voltage ( VR ) will reduce significantly
Explanation:
Determine what happens to the receiving end voltage
Given that ; Load on transmission line is increased and Load has a lagging power factor
Increase in load = Increase in reactive/real power drawn from the transmission line and this will cause an increase in the current drawn as well.
Vs = VR + j XL I
Vs = sending end voltage
VR = receiving end voltage
jXL I = voltage drop across reactance
The rotating and shifting of Vs to a new power angle ( lagging power factor ) without a change in magnitude will cause the value of the VR receiving end voltage to drop significantly
What is the mass per unit area of an 7 inch by 10 inch lead sheet that weighs 192 gm. ____________g / cm2
Answer:
M/A = 0.425 g/cm²
Explanation:
Given the following data;
Mass = 192 grams
Dimensions = 7 * 10 inches.
To find the mass per unit area;
First of all, we would determine the area of the lead sheet;
Area = 7 * 10
Area = 70 in²
Conversion:
1 square inch = 6.452 square centimeters
70 inches = 70 * 6.452 = 451.64 square centimeters
Next, we find the mass per unit area;
M/A = 192/451.64
M/A = 0.425 g/cm²
2. A D flip flop can be made to operate in a toggle mode (divide its CLOCK input frequency by two) by adding an external Inverter gate and making the appropriate connections. Draw the schematic for this circuit.
Answer:
Attached below
Explanation:
Schematic of the D Flip flop is attached below
A D flip flop is used to delay change of state of its output signal and it can be made to operate in Toggle mode as shown i n the schematic diagram below .
Which type of container traps the most heat a shoe box covered in aluminum foil plastic wrap or wax paper?
The container that traps the most heat is a shoebox covered in aluminum foil.
What is the use of aluminum foil?An aluminum foil is used for food storage, and to wrap items, such as meats, to minimize moisture loss while cooking.
Aluminum foil is also an excellent insulator. This is due to the fact that it reduces heat emission by reflecting it back.
Therefore, in a shoebox container, the aluminum foil helps to trap most heat better than a plastic wrap or wax paper.
Learn more about aluminum foil here:
https://brainly.com/question/277354
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A square plate of titanium is 12cm along the top, 12cm on the right side, and 5mm thick. A normal tensile force of 15kN is applied to the top side of the plate. A normal tensile force of 20kN is applied to the right side of the plate. The elastic modulus, E, is 115 GPa for titanium. If the left and bottom edges of the plate are xed, calculate the normal strain and elongation of both the TOP and RIGHT side of the plate. Report your answer with proper units and signicant digits.
Answer:
For the Top Side
- Strain ε = 0.00021739
- Elongation is 0.00260868 cm
For The Right side
- Strain ε = 0.00021739
-Elongation is 0.00347826 cm
Explanation:
Given the data in the question;
Length of the squared titanium plate = 12 cm by 12 cm = 0.12 m by 0.12 m
Thickness = 5 mm = 0.005 m
Force to the Top F[tex]_t[/tex] = 15 kN = 15000 Newton
Force to the right F[tex]_r[/tex] = 20 kN = 20000 Newton
elastic modulus, E = 115 GPa = 115 × 10⁹ pascal
Now, For the Top Side;
- Strain = σ/E = F[tex]_t[/tex] / AE
we substitute
= 15000 / ( 0.12 × 0.005 × (115 × 10⁹) )
= 15000 / 69000000
Strain ε = 0.00021739
- Elongation
Δl = ε × l
we substitute
Δl = 0.00021739 × 12 cm
Δl = 0.00260868 cm
Hence, Elongation is 0.00260868 cm
For The Right side
- Strain = σ/E = F[tex]_r[/tex] / AE
we substitute
Strain = 20000 / ( 0.12 × 0.005 × (115 × 10⁹) )
= 20000 / 69000000
Strain ε = 0.000289855
- Elongation
Δl = ε × l
we substitute
Δl = 0.000289855× 12 cm
Δl = 0.00347826 cm
Hence, Elongation is 0.00347826 cm
A distillation column at 101 kPa is used to separate 350 kmol/h of a bubble point mixture of toluene and benzene into an overhead product with 3 mole % toluene and a bottoms product with 98 mole % toluene. The feed contains 0.45 mole fraction benzene. The overhead reflux occurs at saturation temperature (implies it is total condenser – if it was not, you would have a vapor liquid mixture or a partial condenser akin to a partial reboiler). VLE data for the mixture is given below. An average alpha can be found from the VLE data if solving analytically.
EQUILIBRIUM DATA IN MOLE- FRACTION BENZENE, 101 kPA
y 0.21 0.37 0.51 0.64 0.72 0.79 0.86 0.91 0.96 0.98
x 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0.95
Required:
a. What are the distillate and bottoms flow rates (D and B)?
b. What is the minimum reflux ratio, Rmin (corresponding to N= infinity)?
Answer:
A)
D = 158.42 kmol/h
B = 191.578 kmol/h
B) Rmin = 1.3095
Explanation:
a) Determine the distillate and bottoms flow rates ( D and B )
F = D + B ----- ( 1 )
Given data :
F = 350 kmol/j
Xf = 0.45 mole
yD ( distillate comp ) = 0.97
yB ( bottom comp ) = 0.02
back to equation 1
350(0.45) = 0.97 D + 0.02 B ----- ( 2 )
where; B = F - D
Equation 2 becomes
350( 0.45 ) = 0.97 D + 0.02 ( 350 - D ) ------ 3
solving equation 3
D = 158.42 kmol/h
resolving equation 2
B = 191.578 kmol/h
B) Determine the minimum reflux ratio Rmin
The minimum reflux ratio occurs when the enriching line meets the q line in the VLE curve
first we calculate the value of the enriching line
Y =( Rm / R + 1 m ) x + ( 0.97 / Rm + 1 )
q - line ; y = ( 9 / 9-1 ) x - xf/9-1
therefore ; x = 0.45
Finally Rmin
= (( 0.97 / (Rm + 1 )) = 0.42
0.42 ( Rm + 1 ) = 0.97
∴ Rmin = 1.3095
4. Which of the following is a mechanical property of a material? Conductivity o Strength Heat resistivity Weight
Answer:
The Mechanical Properties include Elasticity, Plasticity, Ductility, Malleability, Hardness, Toughness, Brittleness, Tenacity, Fatigue, Fatigue resistance, Impact Resistance property, Machineability, Strength, Strain Energy, Resilience, Proof Resilience, Modulus of Resilience, Creep, Rupture, and Modulus of Toughness.
In a residence, the control of a room's baseboard electric resistance heating system would be accomplished automatically using a?
A. wall-mounted pressure sensor.
B. duct-mounted thermostat.
C. wall-mounted humidity sensor.
D. wall-mounted thermostat.
Answer:
I think D is the correct answer
Explanation:
hope it is
If an electrical circuit can operate for 10.0 hours with a 2 Ah battery, what is the average current that the circuit demands?
a. 0.2 amperes.
b. 5 amperes.
c. 2 amperes.
d. 20 amperes.
Answer:
A
Explanation:
2/10 = 1/5 = 0.2
A hemispherical shell with an external diameter of 500 mm and a thickness of 20 mm is going to be made by casting, located entirely in the upper part of the corresponding mold, with the maximum circle on the partition surface. If the density of the molten metal is 7.2 g / cm3 and the height of the pouring cavity above the partition surface is 300 mm, determine the metallostatic thrust that will be exerted on the upper mold at the end of casting.
Solution :
Given :
External diameter of the hemispherical shell, D = 500 mm
Thickness, t = 20 mm
Internal diameter, d = D - 2t
= 500 - 2(20)
= 460 mm
So, internal radius, r = 230 mm
= 0.23 m
Density of molten metal, ρ = [tex]$7.2 \ g/cm^3$[/tex]
= [tex]$7200 \ kg/m^3$[/tex]
The height of pouring cavity above parting surface is h = 300 mm
= 0.3 m
So, the metallostatic thrust on the upper mold at the end of casting is :
[tex]$F=\rho g A h$[/tex]
Area, A [tex]$=2 \pi r^2$[/tex]
[tex]$=2 \pi (0.23)^2$[/tex]
[tex]$=0.3324 \ m^2$[/tex]
[tex]$F=\rho g A h$[/tex]
[tex]$=7200 \times 9.81 \times 0.3324 \times 0.3$[/tex]
= 7043.42 N
_____ is the set of processes used to get members of an organization to work together to further the interests of the organization.
Answer:
organizational goals
Explanation:
When you're running a test bench, you would like to include a printout to the screen to inform yourself on the status of the current simulation. Which command you could use to monitor specific variables or signals in a simulation every time one of the signals changes value?
Answer:
$Monitor
Explanation:
The command that would be used when running a test bench to monitor variables or signals ( i.e. changes in the values of specific variables and signa)
is the $Monitor command
This command is also used to monitor the varying values of signals during simulation.
Technician A says in a semi-independent rear suspension system, improper rear wheel toe and tracking may be caused by a bent trailing arm. Technician B says on a semi-independent rear suspension system, improper rear wheel toe and tracking may be caused by a bent inverted U-channel. Who is correct
Answer:
Technician A is correct
Explanation:
Technician A is correct because Toe misalignment in vehicles can be caused by either wear and tear of steering linkages or by a bent trailing arm or a bent tie rod and nit by a bent inverted U- channel hence Technician A is correct
A transformer for charging a power tool steps the line voltage down to 2.9 V. The output current of this transformer is 240 mA. If the transformer is ideal (100% efficient), what is the input current
Answer:
The input current is 5.8 mA
Explanation:
Given;
output voltage of the transformer, V₀ = 2.9 V
output current of the transformer, I₀ = 240 mA = 0.24 A
efficiency of the transformer, E = 100%
the electrical outlet of most homes is 120 V = input voltage
The input power is calculated as follows;
[tex]E = \frac{0utput \ power}{1nput \ power} \times \ 100\%\\\\1nput \ power = \frac{0utput \ power}{E} \times \ 100\%\\\\E = 100\%\\\\1nput \ power = 0utput \ power\\\\1nput \ power = V_0 I_0 \\\\1nput \ power = 2.9 \ \times 0.24\\\\1nput \ power = 0.696 \ W[/tex]
input power = IV
where;
V is input voltage
I is input current
I x 120 = 0.696
I = 0.696 / 120
I = 5.8 x 10⁻³ A
I = 5.8 mA