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Natali5045456 [20]

3 years ago

11

Drilling creates vertical holes in a workpiece, while milling can machine complex 3d surfaces along with simple horizontal and v

ertical lines. true or false

2 answers:

ra1l [238]3 years ago

7 0

Answer:

True

Explanation:

GuDViN [60]3 years ago

7 0

Answer:

True!

Explanation:

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Describe two characteristics that bridges and skyscrapers have in common.

Elan Coil [88]

Answer:

skyscrapers and bridges both have structural builds accounting for the influence of wind and they both cost big money

Explanation:

7 0

3 years ago

Lately, you have noticed some repetitive stress in your wrist. Which sign is most likely the cause of that stress and pain?

Cerrena [4.2K]

1, you might have been carrying things that are way too heavy for you.
2, you might have weak tendons.

3 0

3 years ago

The normal stress at gage H calculated in Part 1 includes four components: an axial component due to load P, σaxial, P, a bendin

Degger [83]

Answer:

hello your question has some missing information attached to the answer is the missing component

Answer : αaxial,p = -6.034 ksi ( compressive )

αbend,p = 19.648 ksi ( tensile )

Explanation:

αaxial, p = $\frac{-p}{A}$ equation 1

αbend, p = $\frac{(P*A)*\frac{d}{2} }{I_{z} }$ equation 2

P = load = 35 kips

A = area of column = 5.8 $in^{2}$

d = column cross section depth = 9.5 in

$I_{Z}$ = 55.0 $in^{4}$

Hence equation 1 becomes

αaxial,p = -35 / 5.8 = - 6.034 ksi ( compressive )

equation 2 becomes

αbend, p = $\frac{(35*6.5)(\frac{9.2}{2}) }{55}$ = + 19.648 ksi ( tensile )

7 0

3 years ago

The hot and cold inlet temperatures to a concentric tube heat exchanger are Th,i = 200°C, Tc,i = 100°C, respectively. The outlet

alexgriva [62]

Answer:Counter,

0.799,

1.921

Explanation:

Given data

$T_{h_i}=200^{\circ}C$

$T_{h_o}=120^{\circ}C$

$T_{c_i}=100^{\circ}C$

$T_{c_o}=125^{\circ}C$

Since outlet temperature of cold liquid is greater than hot fluid outlet temperature therefore it is counter flow heat exchanger

Equating Heat exchange

$m_hc_{ph}\left [ T_{h_i}-T_{h_o}\right ]=m_cc_{pc}\left [ T_{c_o}-T_{c_i}\right ]$

$\frac{m_hc_{ph}}{m_cc_{pc}}$ = $\frac{125-100}{200-120}=\frac{25}{80}=C\left ( capacity rate ratio\right )$

we can see that heat capacity of hot fluid is minimum

Also from energy balance

$Q=UA\Delta T_m=\left ( mc_p\right )_{h}\left ( T_{h_i}-T_{h_o}\right )$

$NTU=\frac{UA}{\left ( mc_p\right )_{h}}$ = $\frac{\left ( T_{h_i}-T_{h_o}\right )}{T_m}$

$T_m=\frac{\left ( 200-125\right )-\left ( 120-100\right )}{\ln \frac{75}{20}}$

$T_m=41.63^{\circ}C$

NTU=1.921

$And\ effectiveness \epsilon =\frac{1-exp\left ( -NTU\left ( 1-c\right )\right )}{1-c\left ( -NTU\left ( 1-c\right )\right )}$

$\epsilon =\frac{1-exp\left ( -1.921\left ( 1-0.3125\right )\right )}{1-0.3125exp\left ( -1.921\left ( 1-0.3125\right )\right )}$

$\epsilon =\frac{1-exp\left ( -1.32068\right )}{1-0.3125exp\left ( -1.32068\right )}$

$\epsilon =\frac{1-0.2669}{1-0.0834}$

$\epsilon =0.799$

5 0

3 years ago

Describe how you could engineer the situation to produce even more friction and heat

lana66690 [7]

True the use many abstract power

6 0

2 years ago