same
less
more
none of the above
Babbitt metal
Monel metal
Nichrome
phosphor bronze
Uranium
Thorium
Niobium
all of these
are formed into shape under heat and pressure and results in a permanently hard product
do not become hard with the application of heat and pressure and so chemical change occurs
are flexible and can withstand considerable wear under suitable conditions
are used as a friction lining for clutches and brakes