PLS HELPPP!!!!!!!!!!!!!!!

What is the sense of a vector that is 20° CW from the negative x-axis?
A. Up and right
B. Down and right
C. Up and left
D. Down and left

Answer:

A) 0.22 m/sec

B) 10.717 sec^-1

C) 32.4 min

D) 20833.848

Explanation:

A) calculate the difference in velocity between paddles and water

Vr = Vp - Vw

Vp = paddle velocity

Vw = water velocity

Vw = 0.3 Vp therefore Vr = 0.7vp

also ; Vp = ωr  =  [tex]\frac{2\pi N}{60} r[/tex] =  [tex]\frac{2*3.14*1.5 *2}{60}[/tex]   =  0.314 m/sec

therefore

Vr = 0.7 * 0.314 = 0.22 m/sec

B)  Value of G

attached below is the detailed solution

C) Retention time

Td = V / Q  = Volume / Discharge = [tex]\frac{30* 15*5*24}{100*10^6*10^-3} * 60 min[/tex]

    =  32.4 min

D) Camp number

camp number = G * t  

                       = 10.717 sec^-1 * 32.4 * 60

                       = 20833.848

Answer:

85 and 86 are the coil pins while 30, 87, and 87a are the switch pins. 87 and 87a are the two contacts to which 30 will connect. If the coil is not activated, 30 will always be connected to 87a. Think of this as the relay in the Normally Closed (OFF) position.

Explanation:

Answer:

The answer is C

Explanation:

Once you have chosen a topic, the next thing you should do before beginning the research process is: C. discuss your idea with others.

A research topic refers to an event, issue, or subject that a researcher is keenly and deeply motivated or interested in, especially when conducting a study or research.

Based on scientific information and records, it is very important you discuss your idea with others once you have chosen a topic, before beginning the research process.

Read more on research topic here: https://brainly.com/question/24590700

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Answer:

Why the f do you have a dumb goose on your clothes?

Explanation:

Chickens are so much better than gooses, first of all, and second of all, drop out of school. Its so much easier. Next year eligible to drop out by law and ima f school and live in da hood with JB Money. Care to join me in Racine? I need some more "employees" to help be a look-out for cops

The ratio of the heat lost due to conduction during the same time interval is   Qw / Qs = 6.

The deliberate or accidental transfer of heat from one material to another is known as heat loss. Radiation, convection, and conduction can all contribute to this.

When a component comes in direct touch with another component, whether it is insulated or not, conduction frequently happens. U value x Wall area x Delta T is the formula used to calculate the amount of heat loss via a wall in BTUs.

Q = KA ΔTФ / L

QL /K = A ΔTФ

Where, A T and is constant

so, QL/K = constant

Qg Lg / Kg = Qw Lw /Kw

0.04 x 15 x 10-3 / 0.025 x 4 x 10-3

Qw / Qs = 6

Therefore, the heat loss is Qw / Qs = 6.

To learn more about heat loss, refer to the link:

https://brainly.com/question/14228650

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Answer:

Reliability is 0.99

Explanation:

Reliability is complementary to probability of failure, i.e. R(t) = 1 –F(t)

F(t) = 0.01

R(t) = 1 - 0.01 = 0.99

Reliability is 0.99

Its means that the probability of failure has dropped 10 times.

Answer:

hello your question is incomplete attached below is the complete question

answer : 0.75  ( A )

Explanation:

Given data:

12 - in diameter pile

embedded 50-ft

type of soil ; clay

Cohesion = 1000 psf

Determine the Ultimate pile Capacity

cohesion = 1000 psf

hence 1000 psf = 1 ksf  (where ; 1 psf = 0.0.001ksf )

form the given table the value of α corresponding to 1 ksf = 0.75

Answer:

B. to lock the tape into place

Explanation:

the button on the front of the housing locks the tape into place when pressed, preventing the tape from being pulled out further it retracting

Answer:

yes it can

Explanation:

Answer:

hello your question is incomplete below is the missing part of the question and attached is the missing diagram

In the simply-supported beam shown in the figure below, d1=14 ft, d2=7 ft, and F=15 kips. so find Az, Ay, By.(in kips)

answer :

Reaction force at B = 10 kips

Reaction force in the y axis = 5 kips

Reaction force in the Z direction = 0 kips

Explanation:

Taking moment about point A

∑ Ma = 0

By + ( d1 + d2 ) - F*d1 = 0

By ( reaction force at B ) = ( 15 * 14 ) / ( 21 ) =  10 kips

Applying equilibrium  forces in the Y-axis

∑ Fy = 0

Ay - F + By = 0

where : F = 15, By = 10

hence ; Ay = 5 kips

applying equilibrium forces in the Z-direction

∑ Fz = 0

Az = 0 kips

Answer: d. [tex]v(t)=(1-5t)e^{-5t}[/tex]V

Explanation: Inductance is a property of an inductor: when there is a change in current passing through a conductor, it creates a voltage in the conductor itself and in the other conductors. Inductance unit is Ω.s or henry (H)

So, the relation between Voltage and Current in an inductor is given by

[tex]v=L\frac{di}{dt}[/tex]

in which

L is inductance in H

i is current in A

Current is [tex]i(t)=10te^{-5t}[/tex], so, derivative will be:

[tex]\frac{di}{dt}=10e^{-5t}+10t(-5)e^{-5t}[/tex]

[tex]\frac{di}{dt}=10e^{-5t}-50te^{-5t}[/tex]

[tex]\frac{di}{dt}=10e^{-5t}(1-5t)[/tex]

Then, voltage is

[tex]v=0.1.10.e^{-5t}(1-5t)[/tex]

[tex]v=(1-5t)e^{-5t}[/tex]

Voltage across the 0.1H inductor is [tex](1-5t)e^{-5t}[/tex] V

Answer:

The BHP would be "65.659 HP".

Explanation:

The given values are:

Discharge,

Q = 0.2 m³/s

Dynamic head,

H = 20 m

Efficiency,

% = 80%

Now,

The Power will be:

⇒ [tex]P=\delta QH[/tex]

On substituting the values, we get

⇒     [tex]=1000\times 9.81\times 0.2\times 20[/tex]

⇒     [tex]=39240 \ W[/tex]

The brake horse power will be:

⇒ [tex]BHP=\frac{100 Q H}{3960n}[/tex]

On putting values, we get

⇒           [tex]=\frac{100\times 0.2\times 20}{3960\times 0.80}[/tex]

⇒           [tex]=65.659 \ HP[/tex]

Answer: the theoretical density is 4.1109 g/cm³

Explanation:  

first the image of one set of ZnS bonding in the crystal structure, we calculate the value of angle θ

θ + ∅ + 90° = 180°

θ = 90° - ∅

θ = 90° - ( 109.5° / 2 )

θ = 35.25°

next we calculate the value of x from the geometry

given that;  distance angle d = 0.234

x = dsinθ

= 0.234 × sin35.25°)

= 0.135 nm = 0.135 × 10⁻⁷ cm

next we calculate the length of the unit cell

a = 4x

a = 4(0.135)

a = 0.54 nm = 0.54 × 10⁻⁷ cm

next we calculate number of formula units

n' = (no of corner atoms in unit ell × contribution of each corner atom in unit cell) + ( no of face center atom in a unit cell × contribution of each face center atom in a unit cell)

n' = 8 × 1/8) + ( 6 × 1/2)

= 1 + 3

= 4

next we calculate the theoretical density using  this equation

P = [n'∑(Ac + AA)] / [Vc.NA]

= [n'∑(Ac + AA)] / [(a)³NA]

where the ∑Ac is sum of atomic weights of all cations in the formula unit( 65.41 g/mol)

∑AA is the sum of weights of all anions in the formula unit( 32.06 g/mol)

Na is the Avogadro’s number( 6.023 × 10²³ units/mole)

so we substitute

P = [4( 65.41 + 32.06)] / [ ( 0.54 × 10⁻⁷ )³ × (6.023 × 10²³)]

= 389.88 / 94.84

= 4.1109 g/cm³

therefore the theoretical density is 4.1109 g/cm³

Answer:

10.203 Volts

Explanation:

For this problem, we need to understand that a series resistive circuit is simply a circuit with some type of voltage source and some resistors, in this case, R1 and R2.

First, we need to find the voltage in the circuit.  To do this, we need to find the total resistance of the circuit.  When two resistors are in series, you sum the resistance.  So we can say the following:

R_Total = R1 + R2

R_Total = 570 Ω + 560 Ω

R_Total = 1130 Ω

Now that we have R_Total for the circuit, we can find the voltage of the circuit by using Ohm's law, V = IR.

V_Total = I_Total * R_Total

V_Total = 17.9 mA * 1130 Ω

V_Total = 20.227 V

Now that we have V_Total, we can find the voltage drop across each resistor by using Ohm's law once more.  Note, that since our circuit is series, both resistors will have the same current (I.e., I_Total = I_1 = I_2).

V_Total = V_1 + V_2

V_Total = V_1 + I_2*R2

V_Total - I_2*R2 = V_1

20.227 V - (17.9 mA * 560 Ω) = V_1

20.227 V - (10.024 V) = V_1

10.203 V = V_1

Hence, the voltage drop across R1 is 10.203 Volts.

Cheers.

Answer:

2600 MPa

Explanation:

The formula to be used for the question is

σ(m) = 2 * σ(o) * [α/ρ(t)]^0.5, where

σ(m) = maximum stress

σ(o) = maximum applied tensile stress

α = length of surface crack

ρ(t) = radius of curvature of the crack

It's an easy one, as we have all the values given from the question, and all we do is plug them in directly

σ(m) = 2 * 130 * [(0.05/2)/0.00025]^0.5

σ(m) = 260 * [0.025/0.00025]^0.5

σ(m) = 260 * 100^0.5

σ(m) = 260 * 10

σ(m) = 2600 MPa

Answer:

phase measurement and the information content

Explanation:

The full form of RTK is Real Time Kinematic. It is used for satellite navigation technique to increase the precision of the position data that is derived from the positioning systems based on satellites like the NavIC, GPS, Galileo, BeiDou and GLONASS. It takes help of the measurements of phase of signal's carrier wave and also the information content of these signals and it also relies on the single interpolated virtual station in order to provide the real time corrections and provide correct and accurate information.

Answer: Pycnocline.

Explanation:

The Pycnocline is the layer, where there is a significant change in density of water with respect to depth.

In freshwater environments such as lakes this density change is primarily as a result of change in water temperature, while in seawater environments e.g oceans the cause of change in density change are changes in water temperature or salinity.

Answer:

Google AnalYtics.

Answer:

Explanation:

From the information given in the question:

The pressure = 1 atm

The saturated humid  air temperature [tex]T_1 = 10^0 \ C[/tex]

The saturated humid air relative humidity [tex]\phi_1[/tex] = 100%

The atmospheric air temperature [tex]T_2[/tex] = 32°C;   &

The atmospheric relative humidity [tex]\phi_2[/tex] = 80%

The data obtained at 1 atm pressure from property psychometric chart at [tex]T_1[/tex] = 10°C

[tex]h_1 = 29.4 \ kJ/kg[/tex] of air ; [tex]\omega _1[/tex] = 0.0077  kg/kg  of air

At [tex]T_2= 12^0 \ C[/tex]

[tex]h_2 = 94.6 \ kJ/kg[/tex] of air;  [tex]\omega _2 = 0.024 \ kg/kg \ of \ air[/tex]

If we take a look at the expression used in combining the conservation of energy and mass for adiabatic mixing of two streams; we have:

[tex]\dfrac{m_1}{m_2}= \dfrac{\omega_2 -\omega _3}{\omega _3-\omega _1}= \dfrac{h_2-h_3}{h_3-h_1}[/tex]

[tex]\dfrac{m_1}{m_2}= \dfrac{0.024 -\omega _3}{\omega _3-0.0077}= \dfrac{94.6-h_3}{h_3-29.4}[/tex]

The mixture temperature [tex]T_3[/tex] is determined through a trial and error method.

At trial and error method  [tex]T_3[/tex] = 24°C

From the relative humidity of 70%;

From the psychometric chart;

The specific humidity [tex]\omega _3[/tex] = 0.0143 kg/kg of air

The enthalpy [tex]h_3[/tex] = 57.6  kJ/kg  of air

Then;

[tex]\dfrac{m_1}{m_2}=1.3[/tex]

Thus, 1.3 is the proportion at which the two streams are being mixed.

Answer: [tex]\Delta S[/tex] = 1.47kJ/K

Explanation: Entropy is the measure of a system's molecular disorder, i.e, the unuseful work a system does.

The nitrogen gas in the insulated tank can be described as an ideal gas, so it can be used the related formulas.

For the entropy, the ratio of initial and final temperatures is needed and as volume is constant, we use:

[tex]\frac{P_{1}}{T_{1}} =\frac{P_{2}}{T_{2}}[/tex]

[tex]\frac{P_{2}}{P_{1}} =\frac{T_{2}}{T_{1}}[/tex]

[tex]\frac{T_{2}}{T_{1}} =\frac{175}{90}[/tex]

[tex]\frac{T_{2}}{T_{1}} =1.94[/tex]

Specific Heat is the quantity of heat required to increase the temperature 1 degree of a unit mass of a substance. Specific heat of nitrogen at constant volume is [tex]c_{v}=[/tex] 0.743kJ/kg.K

The change in entropy is calculated by

[tex]\Delta S= m[c_{v}ln(\frac{T_{2}}{T_{1}})-Rln(\frac{V_{2}}{V_{1}} )][/tex]

For the nitrogen insulated in a rigid tank:

[tex]\Delta S= m[c_{v}ln(\frac{T_{2}}{T_{1}})][/tex]

Substituing:

[tex]\Delta S= 3[0.743ln(1.94)][/tex]

[tex]\Delta S=[/tex] 1.47

The entropy change of nitrogen in an insulated rigid tank is 1.47kJ/K

Hi, your question is unclear. However, I inferred you meant 'object' in computer programming.

Explanation:

Remember, the term 'object' used in programming refers to stored data that can take different forms or states.

For example, a company's employee database may have several object states. Which includes;

Answer:

A. 10

Explanation:

For a single straight vessel; we can express the equation as;

[tex]H_{f_1} = \dfrac{8 \ fl \ Q_1^2}{\pi ^2 gd_1^5} \ \ \ \ \ ... (1)[/tex]

Given that:

The total volume Q₁ = 1000 m/s²

Then the Q₂ = 1000/100 = 10 mm/s₂

However, the question proceeds by stating that 100 pipes of the same cross-section is being used.

Therefore, the formula for the area can be written as:

[tex]\dfrac{\pi}{4}d_1^2 = 100 \bigg ( \dfrac{\pi}{4} d_2^2\bigg)[/tex]

Divide both sides by [tex]\dfrac{\pi}{4}[/tex]

[tex]d_1^2 = 100 \ d_2^2[/tex]

Making [tex]d_1[/tex] the subject of the formula;

[tex]d_1 = 10d_2[/tex]

However, considering a pipe in parallel

[tex]H_{f_2} = (H_f_2)_1 = (H_f_2)_2=...= (H_f_2)_{10}= \dfrac{8 \ fl Q_2^2}{\pi^2 \ gd _2^5} \ \ \ \ \ \ \ ...(2)[/tex]

Relating equation (1) by (2); then solving; we have;

[tex]\dfrac{H_{f_1}}{H_{f_2}} = \dfrac{\dfrac{8flQ_1^2}{\pi^2 \ gd _1^5} }{\dfrac{8\ fl Q_2^2 }{\pi^2 gd_2^5} }[/tex]

[tex]\dfrac{H_{f_1}}{H_{f_2}} =\dfrac{Q_1^2}{Q_2^2} \times \dfrac{d_2^5}{d_1^5}[/tex]

[tex]\dfrac{H_{f_1}}{H_{f_2}} =\dfrac{(1000)^2}{(10)^2} \times \dfrac{d_2^5}{(10 \ d_2)^5}[/tex]

[tex]\dfrac{H_{f_1}}{H_{f_2}} =\dfrac{1}{10}[/tex]

[tex]H_{f_2} =10H_{f_1}[/tex]

Answer:

The correct answer is "20.8 kN" and "31 kN". A further explanation is given below.

Explanation:

The load ratings should be for the SKF bearing including its predetermined distance:

Static load

= 20.8 kN

Dynamic load

= 31 kN

Answer:

Engineers are a very beneficial contribution in which offers great solutions to national problems.

Answer:

d. - peak

Explanation:

In alternating current, the voltage is represented by the following formula:

[tex]V=V_{max}sin(\omega t+\phi)[/tex]

where,

[tex]V_{max}[/tex]=Maximum voltage

[tex]\omega[/tex]=Angular frequency

[tex]\phi[/tex]=phase shift

t=time

The angular frequency can be written in terms of the period (T), so:

[tex]\omega=\frac{2\pi}{T}[/tex]

So the equation will now lok like this:

[tex]V=V_{max}sin(\frac{2\pi}{T} t+\phi)[/tex]

we know that [tex]\phi=\frac{\pi}{2}[/tex] and that [tex]t=\frac{T}{2}[/tex] so the equation will now look like this:

[tex]V=V_{max}sin(\frac{2\pi}{T} (\frac{T}{2})+\frac{\pi}{2})[/tex]

which can be simplified to:

[tex]V=V_{max}sin(\pi+\frac{\pi}{2})[/tex]

[tex]V=V_{max}sin(\frac{3\pi}{2})[/tex]

Which solves to:

[tex]V=-V_{max}[/tex]

so the answer is d. -peak

Answer:

hello your question is incomplete attached below is the complete question

answer : 550°c

Explanation:

From the phase diagram attached we can see that at point between 500° and 600°  i.e.550°c  on the phase diagram the first solid phase was form when a 55 wt% Pb-45 wt% Mg alloy slowly cools down from 700 to 300°c

When we talk of cuvette,we are talking about the instrument we use to hold the solutions that we make use of in the calorimetry experiment and so we will take a measurement of the volume of the solution,if there is some water and other impurities present,we will go ahead to take a measurement of the more volume, however,if some water or other impurities are there,will go ahead and take a measurement of the more volume and now,it will be less of the actual content as a result of some amount of water or impurity in it.

When Concentration = Mass/Volume

A higher volume will be taken, then assumption of mass can be made to be the same because the water or the impurity will as well have mass and as we are taking the mass long also with the mass of the sample when doing this.

Therefore,the concentration will be less.

Answer:

2376 vph

Explanation:

Given data

free flow speed ( Vf ) = 45 mph

Jam density = 25 ft per vehicle

flow rate = 1950 vph

first we calculate the Jam density in vehicle /mile

= 5280 / 25 = 211.2 vehicle/mile

where ; 1 mile = 5280 feet

The maximum flow can be calculated using Greenshield method

q = ( Vf * jam density ) / 4  =  ( 45 * 211.2 ) / 4

  = 2376 vph

Answer:

B a lever because it can move up and down

Explanation:

Answer:

d. 41.4

Explanation:

The initial diameter di = 100mm

The initial height hi {✓59m

Final height = 25 m

Final diameter = ?

Initial volume = after forging volume

D*(di)²*hi = D *(df)²*hf

D will cancel out from either sides of the equation

100² x 50 = df²x25

10000x2 = df²

20000 = df²

df = √20000

df = 141.42mm

Change in diameter = 141.42-100

= 41.42

The percentage change = 41.42/100*100

= 41.4%

The last option is the answer