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Ivahew [28]
3 years ago
11

A double-threaded Acme stub screw of 2-in. major diameter is used in a jack having a plain thrust collar of 2.5-in. mean diamete

r. Coefficients of running friction are estimated as 0.10 for the collar and 0.11 for the screw.
a. Determine the pitch, lead, thread depth, mean pitch diameter, and lead angle of the screw

b. Estimate the starting torque for raising and for lowering a 5000-lb load.

c. What is the efficiency of the jack when raising the load?

d. Would the screw overhaul if a ball thrust bearing of negligible friction were used in place of the plain thrust washer?
Engineering
1 answer:
Temka [501]3 years ago
6 0
This is the answer for the question

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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
Schrodinger equation is a ........... Equation
Tanzania [10]

Answer:

linear partial differential

Explanation:

The Schrödinger equation is a linear partial differential equation that describes the wave function or state function of a quantum-mechanical system. It is a key result in quantum mechanics, and its discovery was a significant landmark in the development of the subject.

5 0
3 years ago
The term supervised learning refers to the fact that we give the learning algorithm a data set, in which the "right answers" wer
kenny6666 [7]

Answer: output value

Explanation: Supervised learning is the machine learning task of learning a function that maps an input to an output based on example input-output pairs.

Supervised learning infers a function from labeled training data consisting of a set of training examples.

In supervised learning, each example consists of a pair of an input object (a vector) and a desired output value (the supervisory signal). A supervised learning algorithm analyzes the training data and produces an inferred function, which can be used for mapping new examples. An optimal scenario will allow for the algorithm to correctly determine the class labels for unseen instances. This requires the learning algorithm to generalize from the training data to unseen situations in a "reasonable" way

A wide range of supervised learning algorithms are available, each having its own strengths and weaknesses.

You should now that, there is no single learning algorithm that works better than the other on all supervised learning problems

5 0
3 years ago
Describe the historical development of building material being used in the construction indsury
scZoUnD [109]

Answer:

Construction, the techniques and industry involved in the assembly and ... Early building materials were perishable, such as leaves, branches, and animal hides. ... The well-developed masonry technology of Mesopotamia was used to build large ... although its precise description is unknown; the concealed faces of stones

Explanation:

4 0
3 years ago
The condensed Q formula may be used for operations in which the friction loss can be determined for:
yan [13]

The condensed Q formula may be used for operations in which the friction loss can be determined for a: 3, 4, or 5 inch hose.

<h3>What is a firehose friction loss?</h3>

A firehose friction loss can be defined as a measure of the effect of the resistance of water against the inner side of a firehose, which typically results in a pressure drop at the terminal end.

Generally, some of the factors that affect the resistance or friction in a firehose include:

  • Length of hose.
  • Age of hose.
  • Water flow (gpm)
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  • Gravity

Mathematically, the firehose friction loss can be calculated by using this formula:

FL = C × (Q/100)² × L/100.

Read more on friction loss here: brainly.com/question/17305262

#SPJ1

3 0
2 years ago
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