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vodka [1.7K]
2 years ago
7

Mong m.n giúp mình vs ạ

Engineering
1 answer:
Ivenika [448]2 years ago
4 0

Answer:

see vous se to pe a he ko off a nack u

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Calculate the reactions at 4 ends (supports) of this bookshelf. Assume that the weight of each book is approximately 1 lb. The w
hoa [83]

Answer:

R = 4.75 lb  (↑)

Explanation:

Number of books = n = 19

Weight of each book = W = 1 lb

Length of the bookshelf = L = 40 inches

We can get the value of the distributed load as follows

q = n*W/L = 19*1 lb/ 40 inches = 0.475 lb/in

then the reactions at 4 ends (supports) of the bookshelf are

R = (q/2)/2 = 4.75 lb

We can see the bookshelf in the pic.

8 0
3 years ago
Can someone help me plz!!
pogonyaev
It has to do with mechanical engineering
6 0
2 years ago
What does this words in the sentence mean giardia duodenalis
Nostrana [21]

Answer:that is associated with diarrhea in humans. ... Examples of giardia in a Sentence ... These example sentences are selected automatically from various online news sources to reflect current usage of the word 'giardia.

Explanation:

8 0
2 years ago
Scientific research techniques are used to analyze the effectiveness of political advertising. False True
miv72 [106K]

Answer:

correct me if i'm wrong but i think it's false

Explanation:

5 0
3 years ago
A specimen of commercially pure copper has a strength of 240 MPa. Estimate its average grain diameter using the Hall-Petch equat
romanna [79]

Answer:

3.115× 10^{-3} meter

Explanation:

hall-petch constant for copper is given by

      S_0=25 MPa

      k=0.12 for copper

now according to hall-petch equation

S_Y=S_0 +\frac{K}{\sqrt{D}}

240=25+\frac{0.12}{\sqrt{D}}

D=3.115× 10^{-3} meter

so the grain diameter using the hall-petch equation=3.115×  10^{-3} meter

5 0
3 years ago
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