'R' in science

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Can you name the R's in these science questions?

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A part of a longitudinal wave in which the density of the particles of the medium is less than the normal density.
The most common viral infectant of the human common cold
Element with atomic number 45
An evolutionary grade of animals, comprising today's turtles, crocodilians, snakes, lizards, and tuatara,
A distillation technique involving the condensation and return of vapours
Physicist widely credited with first 'splitting the atom' in 1917
A mammal which primarily digests plant based foods.
A kind of inflammation of the joints.
A wave whose height is more than twice the mean of the largest third of waves in a wave record
The element responsible for Curie's death.
When the frequency of an external force matches the natural frequency of the body then the body oscillates with large amplitude.
A disease commonly associated with dogs and bats
A type of surface acoustic wave that travels on solids
From latin 'stiiffness of death'
A measure of how strongly a substance opposes the flow of current
The most common food source on the planet
Organelle associated with protein synthesis
Another name is equilateral quadrilateral
A fractional value representing the ratio of the relative speeds of objects before and after a collision.
The gaining of electrons

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