ame some properties of materials. How do you define these properties? Where do they come from?

What is the effect of strain hardening on the material?

How can you assume the linear elastic behavior of a material?

You are looking for properties of a new lubricant your company uses, but only have access to a manual that is written in a foreign language, so you can't read the headers of a table with the material properties. However, the units are all in standard SI symbols. Which quantity is (most likely) the surface tension? The one with units of m2/s The one with units of N/m The one with units of N-s/m2 The one that is m2/(s²"K) The one with units of kg/m3 QUESTION 4 A large helium balloon, which can be approximated as a cylinder with a length of 5 m and a diameter of 2 m, is moored in standard atmospheric air via a small rope. What is the tensile force on the cord? Consider helium's density to be 0.17 kg/m3 and neglect the weight of the rope and thin material that makes the balloon's walls. 16.2 N 637 N 26.2 N 79.7 N 159 N

Give some examples of brittle materials?

Hot fluid "C= 2562 J/kg.k, Pr=51.3, µ = 5.22E-3 Pa.s,k= 0.260 W/m.K" flows at 1.3 kg/min inside a 3-mm diameter, thin- %3| walled tube. The tube is coiled and submerged in a water bath maintained at 23°C. The fluid experiences a temperature drop of 60°C and leaves the tube at 35°C. What is the heat transfer rate "Watts"? Neglect heat transfer enhancement associated with the coiling. Assume fully developed flow, if turbulent flow use Dittus Boelter equation: Nu = 0.023 Re 0.8 Pr. Select one: А. 3630.4 B. 4196.6 C. 2964.2 D. 3930.1 Е. 3330.6

Define a homogeneous material?

Why are pairs of materials more likely to experience thermal stress problems when they represent two different material classes?

For each of the following - choose the best response For Traditional Vs Advanced Ceramics Group of answer choices Coarser structure                                                     Less expensive                                                     Made from natural raw materials                                                     Higher strength                                                     Higher fracture toughness

If you have a material that is initially hard and strong, would you expect it to cyclically harden or soften? What would be a way of characterizing how strong it must be initially to make your answer a bit more quantitative?