Equation of length contraction is `"____________"`

Unit of contraction :

Diaphragm contracts to help in "_____________" while the contraction of abdominal muscles helps in "_____________" .

The all-or-none law of muscle contraction refers to a maximum contraction or no contraction of a__.

What is actinoid contraction? Why actinoid contraction is greater than lanthanoid contraction?

What is lanthanide contraction? What are causes of lanthanide contraction

What is lanthanoid contraction ? What are consequeces of lanthanoid contraction ?