pipeline
It is the nucleus. Mass of electrons is too small
Osteoarthritis is the most common form of arthritis in the knees. Having arthritis in the knees is a very common occurrence that can be treated with varying therapies and medications.
Probably the Discobolus.
It's thermal energy my dear.
The most common form of mass transit in the late 1800s was the train. Although there were some horse-drawn vehicles that carried multiple people, trains had by far the bulk of the mass transit population.
People and goods
MTR (Mass Transit Railway)
Carbon-12 is the most common form of Carbon and therefore, counts for most of the atomic mass.
Probably stellar mass black holes
The most common way to circumnavigate the continent is aboard a ship. The most common mode of transit on the continent is on foot.
The most common thing you would measure mass in would be grams and kilograms
a mudflow
Television is the most widely used form of mass media.
The mass number of the most common titanium isotope is 48.
The most common isotope is einsteinium-253. So atomic mass is 253 for the most common isotope
Television is the most widely used form of mass media.