Collisions

Rear end collisions often cause whiplash.

This car brakes automatically to avoid collisions.

It is generally thought that the earth's water came from collisions with comets.

There were multiple collisions.

I read the article "Effects of Collisions upon a Partial Dyson Sphere."

Underground or aboveground travel would be immune to weather changes and collisions and would require little energy.

The study also suggests such collisions could lead to significant atmospheric gains if the colliding object also has a thick atmosphere.

Scientists at the LIGO and VIRGO observatories detected and confirmed the first gravitational waves produced by the collision and merger of a black hole with a neutron star, not once but twice within 10 days of each other. Previously confirmed gravitational wave detections were the results of either the collisions of a black hole and another black hole or a neutron star with a neutron star, not one of each.

Physicists call these doomsday scenarios ridiculous. They say cosmic rays have been bombarding the earth and triggering collisions similar to those planned for the collider, since the solar system formed 4.5 billion years ago.

It will take a couple of months to bring collisions up to the desired energy. When the LHC gets up to speed, the accelerated protons will travel with nearly the speed of light. The machine will produce about 800 million proton-proton collisions every second.