How does length and initial angle affect the period in a simple pendulum?

717

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How does iron ore turn into steel?

612

---

What is the history on the invention of paper?

584

---

What is the strongest pistol in the world?

648

---

What are the advantages of powder metallurgy?

633

---

What is or what characterize the thermodynamic state of metal (structure of metal)?

520

---

How is solution annealing carried out? What type of furnace is required?

545

---

Do you know what metal might be considered the "most environmental"? I say aluminum because it can be recycled others on my team say brass.

482

---

In grey iron sulpher was above 0.15% what react on metal?

502

---

What is the minimum temperature for stress relieving of astm a 519 gr.4130 material and please tell us where we can find the location.

467

---

What is the melting point of e70 steel, 304,308,316 stainless steels? In addition, what is the hottest part of the flame in a fire?

507

---

Why is chromium molybdenum steels used to build pressure vessels? What is special about the properties of chromium molybdenum steels that make them ideal forpressure vessels?

502

---

How much gold concentration should be in the organic phase (dbc) before reduction by oxalic acid solution? Is it effective on purity of gold in reduction step? Whatis the ratio of dbc to oxalic acid solution in this step?

581

---

What are the properties and application of manganese steel?

501

---

What is iron ferrite and what is it used for, and where is it found?

572

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