What does it mean when a rock is foliated

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?

In a load, the load is paralel to the shaft. n a. angular n b. thrust n c radial n d. none of the above