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3 years ago

How nany degrées is the included angle of General Purpose Acme threads? A. 60 B. 29 c. 14.5 D. 10

Engineering

1 answer:

horrorfan [7]3 years ago

8 0

Answer:

B.29

Explanation:

In general purpose acme thread:

Nominal depth of thread=0.5 $ltimes Pitch$

Included angle =29 degrees

Generally Acme thread are following types

1.General purpose(G) Acme

2.Centralizing(C) Acme

3. Stub Acme

Centralizing(C) Acme threads have tighter tolerance during manufacturing as compare to General purpose(G) Acme threads.

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Twenty sprint cyclists were randomly selected to be in a study designed to test the effectiveness of 4 weeks of creatine supplem

Leokris [45]

Answer:

True. This study utilized a placebo.

Explanation:

Firstly, let's define a placebo.

A placebo is something that seems to be a "real" medicine, however, it is not. It could be a pill, a liquid or other presentations of "Non- real" treatments. When using a placebo, we can affirm that they do not have in their composition an active substance that can improve health.

In this case, we have twenty cyclists randomly selected. Half of them received the truth supplement for four weeks, all the rest received a powdered with similar properties but not physical effects. It means: Half of the cyclist received a "placebo", that seems to be "real" medicine, nevertheless the "placebo" medicine will not show effects on health by its self.

Due to the above, we can conclude that this study utilized a placebo for half of the group.

8 0

4 years ago

A bridge to be fabricated of steel girders is designed to be 500 m long and 12 m wide at ambient temperature (assumed 20°C). Exp

Volgvan

Answer:

a) 22.5number

b) 22.22 m length

Explanation:

Given data:

Bridge length = 500 m

width of bridge = 12 m

Maximum temperature = 40 degree C

minimum temperature = - 35 degree C

Maximum expansion can be determined as

$\Delta L = L \alpha (T_{max} - T_{min})$

where , \alpha is expansion coefficient $= 12\times 10^{-6}$ degree C

SO, $\Delta L = 500\times 12\times 10^{-6}\times ( 40 - (-35))$

$\Delta L = 0.45 m = 450 mm$

number of minimum expansion joints is calculated as

$n = \frac{450}{20} = 22.5$

b) length of each bridge

$Length = \frac{500}{22.5} = 22.22 m$

8 0

3 years ago

Which STEM field involves design and development of processes to solve problems using concepts from the other disciplines?

lesantik [10]

Answer:

Engineering

Explanation:

STEM mainly incorporate knowledge from four disciplines which are:

Science
Technology
Engineering
Mathematics

The field of engineering combines concepts mainly from Science and Mathematics then with the help of technological developments using software, engineering field designs various structures and other elements that are essential to humanity.

Keywords: STEM, Science , Technology , Engineering , Mathematics

3 0

4 years ago

Read 2 more answers

The energy flux associated with solar radiation incident on the outer surface of the earth’s atmosphere has been accurately meas

Degger [83]

Answer:

A) 3.868x10^26 W

B) 8176.678 K

C) 3.544x10^-7 m

D) 393.187 K

Explanation: