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kvv77 [185]
4 years ago
12

The spring has a stiffness k = 200 N>m and an unstretched length of 0.5 m. If it is attached to the 3-kg smooth collar and th

e collar is released from rest at A, determine the speed of the collar when it reaches B. Neglect the size of the collar.

Engineering
1 answer:
ruslelena [56]4 years ago
4 0

Answer:

15.467 m/s

Explanation:

See attached picture.

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Indicate whether the following statements are true or false for an isothermal process: (A) Q=T(∆S). (B) ∆U=0.(C) The entropy cha
Lena [83]

Answer:

A=False

B=False

C=False

D=False

E=False

F=False

Explanation:

A. In an isothermal process, only the reversibly heat transfer is 0, Q_{rev}=T (\Delta S)

B. Consider the phase change of boiling water. Here, the temperature remains constant but the internal energy of the system increases.

C. This is not true even in reversible process, as can be inferred from the equation in part A.

D. This is only true in reversible processes, but not in all isothermal processes.

E. Consider the phase change of freezing water. Here, the surroundings are increasing their entropy, as they are taking in heat from the system.

F. This is not true if (\Delta U)\neq 0, like in answer B. One case where this is true is in the reversible isothermal expansion (or compression) of an ideal gas.

3 0
3 years ago
What are example for mantle
xenn [34]

The definition of a mantle is a shawl or a cloak. An example of a mantle is a fancy shawl worn over a cocktail dress.

3 0
3 years ago
Define Engineering Economy and explain the foundation of Engineering Economy in terms of seven basic principles.
matrenka [14]

Answer:

Check Explanation.

Explanation:

ENGINEERING ECONOMY:

In a simple way, Engineering Economy simply refers to the study of Economics which is related to engineers that is the study of Economic decisions by people in the engineering field. The study of Engineering Economy is very important because Engineering is a major manufacturing part in every country's economy.

With the study of Economics by Engineering that is Engineering Economy, engineers can make rational decisions after seeing alternatives.

The foundation of Engineering Economy in terms of seven basic principles:

(A). Creation of Alternatives: there will always be a problem and every problem had one or more solutions. When a problem has been seen as a problem alternative solutions come in.

(B). Differences in the Alternatives : this part is when engineers makes the best decision(choice) among alternates.

(C). Your viewpoint should be consistent: consistency is power. In order to make decisions in Engineering works or projects, viewpoint should be consistent.

(D). Develop Common Performance Measures: in order to make sure that the project is perfected there should be common performance measures.

(E). Considering Relevant Criteria: relevant Criteria will be met before the best choice is decided

(F). Risk making: Engineering projects should not be put under risk and thus is why this principle is very important.

(G). Decision retargeting: go back to the alternatives and recheck your choices.

6 0
4 years ago
A force that attempts to decrease the length of a structural member is____
Zielflug [23.3K]
I think its C) compression
4 0
3 years ago
Câu 1: Tìm từ trong 2 câu thơ sau liên quan đến các từ: hình chiếu, tia chiếu, mặt phẳng chiếu.
xeze [42]

Explanation:

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ye kon si bhasha hai ??????

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