16 Carbon nanotubes are one of the strongest materials known to engineers. They have an elastic modulus of 1.1 TPa (1TPa = 10¹2 Pa). If a carbon nanotube has a diameter of 15 nm determine the engineering stress, in GPa, sustained by the nanotube when subjected to a tensile load of 4 µN along the length of the tube. Assume that the entire cross-sectional area of the nanotube is load bearing. 3.14. Enter the answer rounded to one place after the decimal (xx.x). Do not enter the units. Note: This answer will be required in the next question so please note this down. Type your answer... 17 Carbon nanotubes are one of the strongest materials known to engineers. They have an elastic modulus of 1.1 TPa (1TPa = 10¹2 Pa). Assume that the carbon nanotube is only deformed elastically under a load of 4 uN. The carbon nanotube has a length of 10 pm. what is the elongation of carbon nanotube in nanometres. Use the engineering s om previous Q16. Enter the rounded integer answer without decimal place. Do not enter the units. Type your answer...

The stress-strain curve of a thermoset material is given in the figure below. Calculate the total strain energy at the point of fracture for a cylinder (diameter = 3mm and length = 4mm) made from this thermoset material.

Extension Compression Determine the engineering strain "e" and the true strain "e" for each of the following situations of extending a bar of length L or compressing a billet of height h: Extension from L to 1.002 L Compression from h to 0.998 h Extension from L to 1.9L Compression from h to 0.1h Compression from h to zero height

Mechanical engineering. A steel beam is installed in a building when the ambient temperature is -12C. If the beam if fixed at it's ends (prevented from expanding/contracting), calculate the stress that will develop in the beam if the ambient temperature rises to +32C. State whether the stress is tension or compression. Assume E 200,000 MPa and \alpha L = 12x10-6 (/\deg C)