Name The Year: Niels Bohr, physicist, expanded quantum physics (Nobel 1922), born.?

Questions

A typical double mattress contains as many as ---------- house dust mites.?

According to one study, ---------- of lawns have some sort of lawn ornament.?

All 50 ---------- are listed across the top of the Lincoln Memorial on the back of the $5 bill.?

All hospitals in Singapore use ---------- diapers.?

Aluminum is strong enough to support ---------- pounds per square inch.?