'R' in science

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

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

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