A needle made out of steel - the sort you sew a button on with.
compasses have Mineral Oil filled Needle Housings, with steel needles that pivot on a sapphire bearing The light mineral oil is there to damp the needle (stop the needle swinging too loosely) and it has to withstand freezing (because compasses are used in cold places).
A hypodermic needle is normally made from a stainless-steel. A sewing needle is a long slender tool with a pointed tip. The first needles were made of bone or wood; modern ones are manufactured from high carbon steel wire, nickel- or gold plated for corrosion resistance. The highest quality embroidery needles are made of platinum.
D2 tool steel is a steel, tool steel. For cold rolled steel, D2.
Steel-bound means "bounded by steel."
stainless steel
A needle is made of steel ; as steel is denser than water, a steel needle should sink in water because of this.
magnets attract steel why then is a compass needle affected by a pice of steel if the steel is not magnetised
A compass needle is a magnetized steel needle that aligns with the Earth's magnetic field. Its use allows for determining directions such as north, south, east, and west.
chipping rusty steel
Steel.
The Space Needle has a concrete foundation. It has 250 tons of reinforcing steel.
== == Yes. It is magnetic or not. Tertium non datur. (Actually, the needle made of steel is a ferromagnetic.)
The needle is solid, it's density higher than water's. The ship is hollow, its overall density lower than water's.
The best material to use as a compass needle is magnetized steel. Steel is strong, magnetizable, and maintains its magnetic properties well. It is also readily available and cost-effective for compass construction.
Iron or steel
The density of a needle can vary depending on the material it is made of. For example, a stainless steel needle has a density of about 8 grams per cubic centimeter, while an aluminum needle has a density of about 2.7 grams per cubic centimeter.
The water extracted by the wood log while floating is of equal weight of the wood or more. For this reason, the log of wood floats while a steel needle sinks.