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From an alloy, two specimens are machined and tested separately under tension and compression. The engineering stress-strain curves as well as the true stress-true strain curves for tension and compression are plotted in the same diagram. Identify the correct statements:
P. The engineering stress-strain curves in tension and compression are identical.
Q. The true stress-true strain curve in compression is lower than the true stresstrue strain curve in tension due to Bauschinger effect.
R. The true stress-true strain curve in tension is above the corresponding engineering stress-strain, curve.
S. The true stress-true strain curve in tension and compression are identical.
According to the International Commission on Education for the Twenty-first Century headed by Jacques Delors, which of the following main tensions will be witnessed during the 21st century ? A. The tension between the global and the local B. The tension between tradition and modernity C. The tension between the spiritual and the material D. The tension between the poor and the rich E. The tension between the developed and the developing societies Choose the correct answer from the options given below:
250C তাপমাত্রায় H2+Cl2+2H2O=2H3O++2Cl- বিক্রিয়ায় সাম্যাংক, K=1046 । 250C তাপমাত্রায় Pt, H2HClaqCl2,Pt কোষের E0 হিসেব করো।
Consider the following statements.
1. Surface tension of liquid depends on length but not on the area, like the elastic property.
2. SI unit of surface tension is N/m.
3. Surface tension is a scalar quantity because it has no specific direction for a given liquid.
Which of the statement(s) given above is/are correct?
Given below are three quantities named A, B and C. Based on the given information, determine the relation among the three quantities. Quantity A∶  A 30 litre mixture of wine and water has wine and water in the ratio 5∶ 7. How much water must be drawn off so that the ratio of wine and water becomes 25∶ 19? Quantity B∶ A 35 litre mixture of wine and water has wine and water in the ratio 1∶ 3. How much water must be drawn off so that the ratio of wine and water becomes 1.75∶ 3.35? Quantity C∶ A 27 litre mixture of wine and water has wine and water in the ratio 3∶ 2. How much water must be drawn off so that the ratio of wine and water becomes 81∶ 11?
Consider the following statements: A. A water drop in a vacuum is perfectly spherical. B. The shape of a water drop is due to the action of gravity. C. Soaps and detergents drastically decrease the surface tension of water. D. As temperature increases, surface tension also increases and becomes maximum at critical temperature. Which of the above statements are correct?  Select the code for the correct answer from the options given below:
Determine the correctness or otherwise of the following Assertion (a) and Reason (r).
Assertion: During rolling, front tension and (or) back tension are (is) employed to decrease rolling load.
Reason: Roll pressure decreases due to lowering of flow stress as a result of front tension/back tension.
Bottled water is drinking water (e.g., well water, distilled water, mineral water, or spring water) packaged in PET Bottle or Glass Water Bottles. Bottled water is comprehensively regulated by the U.S. Food and Drug Administration (FDA) as a packaged food product. By law, the FDA regulations for bottled water must be at least as stringent as the Environmental Protection Agency standards for tap water. What inference can be drawn from the above passage?
Following are general statements about water drops. (a) Surface tension is responsible for the spherical shape of the water drops. (b) Even in the absence of gravitation, water drops have a spherical shape. (c) Formation of water drops occurs, if the mass of the water is stretched. Which of the above statement/statements is/are correct?
A three-star medicine is prepared by mixing two type of fluids (A & B) in ratio of 1 : 4. Fluid A is prepared by mixing two type of water, water M and water N in ratio of 4 : 5. Fluid B is prepared by mixing two type of water, water X and water N in ratio of 3 : 7. The final mixture is prepared by 675 units of three-star medicine with water Y. If the concentration of the water N in the final mixture is 60%, then how much water Y had been added to three-star medicine?