How are slumps and slides different?

a. slumps are a type of sediment flow. slides are a type of slope failure.

b. slides are a type of sediment flow. slumps are a type of slope failure.

c. slumps happen very quickly. slides happen very slowly over time.

d. slides move sediment down pre- existing rock surfaces. slumps carve out curves of sediment.

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

What are two different ways you could find the value of a? explain these methods.

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.