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3 years ago

In the layout of a printed circuit board for an electronic product, 12 different locations can accommodate chips.

Engineering

1 answer:

iren [92.7K]3 years ago

4 0

Answer:

a) 244,140,625 different ways

b) 390,625 different ways

Explanation:

a) If there are 5 ways to place a chip on each location, and there are 12 locations overall, we have:

5^12 ways of placing them

This would mean a total of 244,140,625 different ways

b) If five chips are of the same type, we can first find how many ways we can place chips on the remaining 7 locations:

5^7 = 78,125

Next we can multiply this by the number of ways the next 5 chips could be the same:

78,125 * 5 = 390,625 different ways

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One - tenth kilogram of air as an ideal gas with k= 1.4 executes a carnot refrigeration cycle as shown i fig. 5,16, the isotherm

maria [59]

Answer:

Hello your question is incomplete attached below is the missing part

a) p1 = 454.83 kPa, p2 = 283.359 Kpa , p3 = 536.423 kpa , p4 = 860.959kPa

b) W12 = 3.4 kJ, W23 = -3.5875 KJ, W34 = -4.0735 KJ, W41 = 3.5875 KJ

c) 5

Explanation:

Given data:

mass of air ( m ) = 1/10 kg

adiabatic index ( k ) = 1.4

temperature for isothermal expansion = 250K

rate of heat transfer ( Q12 ) = 3.4 KJ

temperature for Isothermal compression ( T4 ) = 300k

final volume ( V4 ) = 0.01m ^3

a) Calculate the pressure, in Kpa, at each of the four principal states

from an ideal gas equation

P4V4 = mRT4 ( input values above )

hence P4 = 860.959kPa

attached below is the detailed solution

b) Calculate work done for each processes

attached below is the detailed solution

C) Calculate the coefficient of performance

attached below is detailed solution

6 0

3 years ago

The condition of irrotationality for a two-dimensional flow is satisfied when rotation w everywhere is (less than — equal to — m

Deffense [45]

Answer:

Zero.

Explanation:

Lets take velocity V is given as in 2 dimensional flow

V=u i +v j

V=f(x,y)

u=f(x,y)

v=f(x,y)

Rotational ability ω given as

$\omega =\dfrac{1}{2}\left (\dfrac{\partial v}{\partial x}-\dfrac{\partial u} {\partial x}\right)$

ω=0 ,then flow will be irrotational.

ω ≠0 ,then flow will be rotational.

So we can say that , ω will be zero every where for irrotational two dimensional flow .

5 0

3 years ago

1. A wood board is one of a dozen different parts in a homemade robot kit. The width, depth, and height dimensions of the board

otez555 [7]

Answer:

183.75 cubic inches.

Explanation:

The volume of the wood board is determine by means of this expression:

$V = w \cdot h \cdot l$

By replacing variables:

$V = (7.5 in) \cdot (14 in) \cdot (1.75 in)\\V = 183.75 in^{3}$

3 0

3 years ago

What is the highest possible theoretical efficiency of a heat engine operating with a hot reservoir of furnace gases at 727°C wh

hichkok12 [17]

Answer:

$\eta_{max} = 70%$

Explanation:

given data:

maximum temperature = 727 degree C =727 +273 = 1000 K

Minimum temperature = 27 degree C = 27 +273 = 300 K

Maximum efficiency is given as $\eta$

$\eta = \frac{T_{max} - T_{min}}{T_{max}} *100%$

plugging all value from the above to get maximum efficiency

$\eta = \frac{1000-300}{1000} *100%$

$\eta_{max} = 70%$

8 0

3 years ago

Recently, there was an outbreak of a computer virus, known as the Melissa virus. The FBI is determining whether the virus meets

never [62]

Answer:

Correct answer is (c)

Explanation:

The transmission of a program, information, code, or command that intentionally causes damage without authorization, to a protected computer.

Melissa virus is a computer program that was meant to cause serious damage to computer system by sending e-mail from an infected computer to the mail address on that computer. The virus was investigated by the FBI's National Infrastructure Protection Center. By transmission of a program, information, code, or command that intentionally causes damage without authorization, to a protected computer, The FBI's NIPC will be able to investigate how Melissa is being proliferated.

5 0

3 years ago