The diagram shows a hammer being used by a person to remove a nail from a piece of wood. the hammer is being used as which type of simple machine? @3.2.6.b4 @1

a)
wheel-and-axle

b)
lever

c)
pulley

d)
incline plane

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

Two friends are having a conversation. anna says a satellite in orbit is in freefall because the satellite keeps falling toward earth. tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not 9.80 m/2 . who do you agree with and why?

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?