Which applies to the collision theory?
particles need to collide in order to react.
particles may obtain successful collisions in any molecular orientation.
temperature increase causes kinetic energy of particles to decrease.
reactions do not have to begin with collision of molecules or particles.

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.

When does a spring tide occur? question 9 options: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall. they occur on the date of the vernal equinox each year, no matter what stage the moon is in. this is why they are called spring tides. they occur when the sun, moon, and earth are at 45-degree angles from each other. this happens once every spring. they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.

Which factor affects the force of gravity between objects? check all that apply. direction distance mass shape time