A piece of nylon rope used by a mountaineer extended by 1.5 m when carrying the load of the 80 kg mountaineer. If the total length of the rope is 50 m and its diameter is 10 mm, determine the Young’s of this material. If the Poisson’s ratio of nylon is 0.1, determine the change in the diameter...
The distance between the primary planes of a NaCl crystal is 2.82 Å. It was found that the first order Bragg reflection of a monochromatic x-ray beam occurs at sinus= 10 degree. (i) Determine the wavelength of the x-ray. (ii) Determine the angle, sinus for a second order reflection.
One mole of liquid water occupies a volume of 18 cm3. Imagine that each molecule on the average is at the centre of a small cube. (i) What is the length of the sides of this small cube? (ii) Compare this length with the diameter of a molecule.