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ankoles [38]
4 years ago
10

5 cm circuit board dissipating 20 W of power uniformly is cooled by air, which approached the circuit board at 20C with a veloc

ity of 6 m/s. Assume the flow to be turbulent, since the electronic components are expected to act as turbulators. Disregard any heat transfer from the back surface of the board, and suppose that radiation heat transfer is negligible. Evaluate thermal properties of the air at a film temperature of 27C. Determine the surface temperature (C) of the electronic components at the following locations i) the leading edge of the boa

Engineering
1 answer:
fgiga [73]4 years ago
4 0

Answer:

Explanation:

Find attached the solution

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5. One of the major road blocks for direct DC power in residences is the ___. A) generation of DC B) lack of standardization C)
Montano1993 [528]

Answer:

D) quantity of components required for this type of system

Explanation:

Electricity can be transmitted using the alternating and direct currents. The alternating current is one in which the flow of the current diverts at certain time intervals whereas, the direct current is one in which there is a constant one-directional flow of current. The DC is used in batteries and solar panels. Residential areas and business places make use of the AC current.

One of the several reasons why the DC is not used in homes is because unlike the AC it is not easy to build and sustain. Moreso, it has more components compared to the AC. For example, its motor consists of brushes and commutators . The components, example, switches are also large compared to the AC components.

6 0
4 years ago
Basic Question please help
Dvinal [7]
1(A)
2(B)
3(E)
4(C)
5(D)
6(B)
7(C)
7 0
3 years ago
Write a program that computes the square footage of a house given the dimensions of each room.Have the program ask the user how
baherus [9]
#include

int main () {

printf("Program to calculate the square footage of the house.\n");

int total_rooms;

double length, width;

double total_square_footage = 0.0;

printf("Enter total number of rooms in the house:");

scanf("%d", &total_rooms);

for (int i = 0; i
printf("Enter the lenght and width of room %d: ", i+1);

scanf("%if %if", &lenght, &width);

total_square_footage += lenght*width;

}

printf("Total square footage of the house: %if\n", total_square_footage);

return 0;

}


Please mark it as brainliest answer:).

4 0
3 years ago
What can employers do to help ensure safety in a confined space? Employers can:
Lera25 [3.4K]

Answer:

option 3 is the correct answer

5 0
3 years ago
To use the shear formula, the internal shear force must be:
nasty-shy [4]

Answer:

vertical, and directed along an axis of symmetry of the cross-section

Explanation:

Shear is a force in an object is in the form of stress or strain. Shear strain is the ratio of length of deformation (extension) to the perpendicular length in the plane of the force applied. Shear stress, which is the stress that tends to shear a material,  is the ratio of shear force applied on a surface to the area of the surface.

The shear formula can be used to determine the maximum shear in an object and is given by; τ = \frac{VQ}{It}. It is applicable when the internal shear force is vertical and directed along an axis of symmetry of the cross-section.

8 0
4 years ago
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