1. Define stress 2. Define Strain 3. Define each type of modulus 4. Legend says

Question

1. Define stress

2. Define Strain

3. Define each type of modulus

4. Legend says that archimedes, in determining wheteher or not the king's crown was made of pure gold, measured its volume by water

5. Describe these states of matter. What relative temperatures are associated with them?

a)liquid

b)plasma

c)gas

d)solid

6. A block of wood has a density 0.55 g/cm^3 and mass 2500 g. It floats in a container of oil (the oils density is 0.85 g/cm^3). What volume of oil does the wood displace?

7. The bulk modulus of a material, as a meaningful phyical property, is applicable to which of phases?

8. By what factor is the total pressure greater at a depth of 750 m in water than at the surface where pressure is one atmosphere? (water density = 1.0x10^3 kg/m^3 , 1 atmosphere pressure = 1.01x10^5 N/m^2 and g = 9.8 m/s^2)

Explanation / Answer

1. Stress = force/area 2. strain = change in length / original length 3. Young's modulus = normal stress / longitudinal strain = Fl/Ae Bulk modulus = normal stress / volumetric strain Sheer modulus = sheer stress/sheer strain 4. Yes, volume of water was used. What's the question here?? 5. liquid- particles move freely, but volume is fixed. plasma- positive ions and negative electrons seperated due to excessive heating. gas- particles move freely, occupy any amount of volume given solid- particles are attached to one another and have a specific shape 6. mass of oil displaced = mass of wood 0.85*v = 2500 v = 2941 cc 7. solids 8. pressure = 1.01*10^5 + pgh = 101000 + 10^3 * 9.8*750 = 7.45*10^6 N/m^2 It is 72.77 times atmospheric pressure

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