a tape measure
that would be a bed of nails
A measuring beaker.
A balance is the best tool for measuring mass.
amount of what.
Tons
Your local mattress store would be the best place to start, as well as ask questions to the employees as to which sort of bed linen would be best for your bed.
A Full Electric Hospital Bed would be ideal.
a tape measure
i would say 150 grams
A caliper would be the best tool for measuring the width of a pencil lead. It is precise and allows you to measure small dimensions accurately.
miles
Feet and inches.