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brilliants [131]

3 years ago

13

*6–24. The beam is used to support a dead load of 400 lb>ft, a live load of 2 k>ft, and a concentrated live load of 8 k. D

etermine (a) the maximum positive vertical reaction at A, (b) the maximum positive shear just to the right of the support at A, and (c) the maximum negative moment at C. Assume A is a roller, C is fixed, and B is pinned.

1 answer:

lisabon 2012 [21]3 years ago

3 0

Answer:

(a) maximum positive reaction at A = 64.0 k

(b) maximum positive shear at A = 32.0 k

(c) maximum negative moment at C = -540 k·ft

Explanation:

Given;

dead load Gk = 400 lb/ft

live load Qk = 2 k/ft

concentrated live load Pk =8 k

(a) from the influence line for vertical reaction at A, the maximum positive reaction is

$A_{ymax}$ = 2*(8) +(1/2(20 - 0)* (2))*(2 + 0.4) = 64 k

See attachment for the calculations of (b) & (c) including the influence line

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Heat is applied to a rigid tank containing water initially at 200C, with a quality of 0.25, until the pressure reaches 8 MPa. De

creativ13 [48]

Answer:1747.53KJ/kg

Explanation:

Given data

Initial Temprature $\left ( T_i\right )=200^{\circ}$

Quality $\left ( \chi\right )=0.25$

Final pressure $\left ( P_2\right )=8MPa$

Given tank is rigid therefore specific Volume remains same

now calculating properties at $200^{\circ}$

$\nu _f=0.001156m^3/kg$

$\nu {fg}=0.126434m^3/kg$

$h_f=852.26KJ/kg$

$h_{fg}=1939.8KJ/kg$

Now Specific volume of steam at $200^{\circ}$

$\nu _1=\nu _f+\chi \times \nu {fg}$

$\nu _1=0.001156+0.25\times 0.126434$

$\nu _1=0.03276m^3/kg$

$h_1=h_f+\chi \times h_{fg}$

$h_1=852.26+0.25\times 1939.8$

$h_1=1337.21 KJ/kg$

Now $\nu_1=\nu_2$

$0.03276=\nu_2$

At 8 MPa and $\nu =0.03276m^3/kg$

$\nu _g=0.02356$

Since $\nu _2\ is\ greater\ than \nu _g$

therefore final state of steam is superheated at $T=381^{\circ}$

at this state $h_2=3084.74 KJ/kg$ (obtained from steam table)

Therefore heat added

$Q=h_2-h_1=3084.74-1337.21=1747.53 KJ/kg$

3 0

3 years ago

A 1 250 kg car moving at a velocity of 30 km/hr along EDSA is accelerated by a force of 1 700 N. What will be its velocity after

Talja [164]

<h3><u>The velocity of the car after 10 s is 78.95 km/hr</u></h3>

Explanation:

<h2>Given:</h2>

m = 1,250 kg

$v_i$ = 30 km/hr

F = 1,700 N

t = 10 s

<h2>Required:</h2>

Final velocity

<h2>Equation:</h2><h3>Force</h3>

F = ma

where: F - force

m - mass

a - acceleration

<h3>Acceleration</h3>

a = $\frac{v_f \:-\:v_i}{t}$

where: a - acceleration

$v_i$ - initial velocity

$v_f$ - final velocity

t - time elapsed

<h2>Solution:</h2><h3>Solve for acceleration using the formula for force</h3>

F = ma

Substitute the value of F and m

(1700 N) = (1250 kg)(a)

a = $\frac{1700\:N}{1250\:N}$

a = 1.36 m/s²

<h3>Solve for final velocity using the formula for acceleration</h3>

Convert 30 km/hr to m/s

= $\frac{30\:km}{hr}\:×\:\frac{1000\:m}{1\:m}\:×\:\frac{1\:hr}{3600\:s}$

= $8.33 m/s$

Substitute the value of a, $v_i$ and t

a = $\frac{v_f \:-\:v_i}{t}$

$1.36\: m/s² \:= \:\frac{v_f \:-\:8.33\:m/s}{10\:s}$

$(10 \:s)1.36\: m/s² \:= \:v_f \:-\:8.33\:m/s$

$v_f\: =\: (10 \:s)1.36 \:m/s²\: + \:8.33\:m/s$

$v_f \: =\: 13.6 \:m/s \:+\: 8.33\:m/s$

$v_f\: =\: 21.93\: m/s$

Convert to km/hr

= $\frac{21.93\:m}{s}\:×\:\frac{1\:km}{1000\:m}\:×\:\frac{3600\:s}{1/:hr}$

= $78.95\: km/hr$

<h2>Final answer</h2><h3><u>The velocity of the car after 10 s is 78.95 km/hr</u></h3>

6 0

3 years ago

If the price of the car is less than or equal to your available cash, display "no". If the price of the car is more than your av

Ede4ka [16]

Answer:

function decision(car_price, available_cash) {

if(car_price <= available_cash) {

console.log("no");

}

else {

console.log("yes");

}

}

decision(car_price, available_cash); or decision(available_cash, car_price);

Explanation:

using functions in Javascript:

functions; this refers to dividing codes into reusable parts.

e.g function function_name() {

console.log("How are you?");

}

you can call or invoke this function by using its name followed by parenthesis, like this: function_name(). each time the function is called it will print out "How are you?".

Parameters: these are variables that act as placeholders for the values that are to be input into a function when it is called

Arguments: The actual values that input or passed into a function when it is called.

e.g

function function_name(parameter1, parameter2) {

console.log(parameter1, parameter2);

}

then we call function_name: function_name("please", "leave"):we have passed two arguments, "please" and "leave". Inside the function parameter1 equals "please" while parameter2 equals "leave".

Hence, from the question given the two parameters "car_price" and "available_cash" respectively, we write the function with name function_name:

function decision(car_price, available_cash) {

if(car_price <= available_cash) {

console.log("no");

}

else {

console.log("yes");

}

}

decision(car_price, available_cash); or decision(available_cash, car_price);

7 0

3 years ago

A student engineer is given a summer job to find the drag force on a new unmaned aerial vehicle that travels at a cruising speed

yan [13]

Answer:

b. 1232.08 km/hr

c. 1.02 kn

Explanation:

a) For dynamic similar conditions, the non-dimensional terms R/ρ V2 L2 and ρVL/ μ should be same for both prototype and its model. For these non-dimensional terms , R is drag force, V is velocity in m/s, μ is dynamic viscosity, ρ is density and L is length parameter.

See attachment for the remaining.

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4 years ago

A total knee replacement experiences a spectrum of loading events, some rapid and some nearly steady state (but for a limited du

Gennadij [26K]

Answer: your question is quite vague hence i will just give you the general answer regarding your question

answer : Deborah number = time of relaxation / time of observation

Explanation:

Estimate of the duration of the possible loading events

to estimate the duration of the possible loading events will first determine the Deborah number as shown

Deborah number = time of relaxation / time of observation

lets assume; Time of observation = 1 and time of relaxation = 1 day

Deborah number is dimensionless and it is used to determine viscoelastic behavior of a material hence the viscoelastic response during observation time is proportional to Deborah number

3 0

3 years ago