The name of this British monetary unit comes from a unit of weight
a pound
By any measure this object is 36 inches long
yardstick
Oxford says this preposition is the 7th-most common word in English; it's in this clue twice
in
This Austrian monk found pairs of genes separate in a random fashion when a plant's gametes form
Mendel
This number is represented by the Roman numeral X
10
From 1792 to 1873 the U.S. issued silver 5-cent coins called not nickels but "half" these
dimes
Beware not to infringe upon this, which can be identified by a letter "C" enclosed within a circle
copyright
Because of metal shortages, from 1943 to 1945 these famous award statuettes were made of plaster
Oscars
Surely this rings a bell: the name of this physiologist who studied the secretory activity of digestion from 1890 to 1900
Pavlov
In a letter or message, an X symbolizes one of these
a kiss
The Lincoln Memorial is on the back of this U.S. bill
the $5
This word is a synonym for versus
against
The traditional "Big 3" of U.S. automakers are Chrysler, General Motors & this one
Ford
This Swede's original scale had water's boiling point at 0 degrees & its freezing point at 100
Celsius
This male first name starting with "X" is also a Jesuit university in Cincinnati
Xavier
A silver tetradrachm from the 300s B.C. features a great portrait of him
Alexander the Great
It's a belief, not based in reason, that something bad will happen if you perform a particular action... or if you don't
superstition
This state's richest man is French fry tycoon Scott Simplot
Idaho
This giant of modern physics was diagnosed with ALS as a graduate student at Cambridge
Hawking
In the 1637 work "Geometrie" he introduced the use of X, Y & Z as symbols of unknown quantities
Descartes
English settlers in the New World used this word from Algonquian for beads used as Indian money
f
wampum
One definition is a stitched-together type of publication having between 5 & 48 pages
pamphlet
This alloy of copper & tin gave its name to a cultural "Age"
bronze
This Rome-born physicist designed the first nuclear reactor
Enrico Fermi
X Division at this New Mexico national lab is the USA's center for the physics of nuclear weapons
Los Alamos