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ch4aika [34]
3 years ago
13

Once you have chosen a topic, what should you do before beginning the research process? a. Find as many possible facts and detai

ls on your topic c. Discuss your idea with others b. Choose a position d. None of these Please select the best answer from the choices provided A B C D
Engineering
1 answer:
dlinn [17]3 years ago
3 0

Answer:

The answer is C

Explanation:

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A rigid bar ABCD is pinned at A and supported by two steel rods connected at B and C, as shown. There is no strain in the vertic
mylen [45]

Answer:

See attached picture.

Explanation:

4 0
3 years ago
What type of fire extinguisher is used for electrical fires.
AysviL [449]
The all purpose one will work or you could use type C I believe.
8 0
3 years ago
Liquid ethanol (C2H5OH) at 298 K, 1 atm enters a steam generator operating at steady state and burns completely with dry air ent
Gennadij [26K]

Answer:

Q= 6491.100 kJ/s

Explanation:

Air-Fuel Ratio:

For a combustion reaction the proportion of air that is present in a gaseous substance responsible for the reaction,this proportion is known as air-fuel ratio.The air fuel ratio is calculated using the combustion reaction for the substance.

Considering reaction for the Ethanol as

C₂H₅OH +XO₂(O₂+3.76N₂)→ aCO₂+bH₂O+cN₂

Balancing the equation we get;

a=2,

2b=6

∴ b=3

xO₂=3

The air-fuel ratio

A/F = XO₂+H₂O+xN₂× mass of N₂/mass(fuel)

3.31×31.9+11.28×28.013/46.069

= 8.943

Equivalent ratio = 0.7,

so, heat transfer

Q= m ×Cp×ΔT

= 75×0.7×112.4(1500-400)

Q= 6491.100 kJ/s

1kJ/s=1000w

∴ Q= 6491100 W

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6 0
4 years ago
Compute the volume percent of graphite, VGr, in a 3.1 wt% C cast iron, assuming that all the carbon exists as the graphite phase
Arte-miy333 [17]

Answer:

The volume percent of graphite is 9.9%

Explanation:

Given;

weight percent of graphite, C = 3.1wt%

density of ferrite, \rho _f = 7.9 g/cm³

density of graphite, \rho _g = 2.3 g/cm³

Determine the mass fraction;

W_f = \frac{C_g - C_0}{C_g -C_f} \\\\W_f =\frac{100 - 3.1}{100-0}\\\\W_f = 0.969\\\\\\W_g = \frac{C_0 - C_a}{C_g -C_f} \\\\W_g =\frac{3.1-0}{100-0}\\\\W_g = 0.031

Determine the volume fraction;

V = \frac{W_g/ \rho_g}{W_f / \rho_f \ + \ W_g / \rho_g} *100 \%\\\\V = \frac{0.031/ 2.3}{0.969 / 7.9 \ + 0.031 / 2.3}*100\%\\\\V = 9.9\%

Therefore, the volume percent of graphite is 9.9%

8 0
3 years ago
The objective of a properly proportioned concrete mix are: a.__________________________________________________________ b.______
sukhopar [10]

Answer:

The objective of a properly proportioned concrete mix are:

  • To produce the combination of cementitious material, water, and aggregate that meets the requirements of a particular structure, portion of a structure, or series of structures at least cost.
  • To produce concrete of the specified properties.
  • To produce a satisfactory of end product, such as beam, column or slab as economically as possible.

Cheers!

4 0
3 years ago
Read 2 more answers
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