What are two indicators a chemical reaction has taken place

The force on an airplane's wing from the air flowing past it is mostly perpendicular to the wing's flat surface; this is the force that holds the plane aloft in level flight. Given this fact, why do planes "bank" when making a turn?

Is Oregon (United States) located in the Northern or Southern Hemisphere?

What describes Newton's law of universal gravitation

Which term identifies the dark smooth areas on the surface of the moon? craters terrae maria regolith

Option 1 - describe the difference between sensation and perception, using fireworks as an example. include the sensory stimuli involved, as well as bottom-up and top-down processing.

The correctly balanced equation for H2O2 → H2O + O2 is

How would an unbalanced chemical equation convey misleading information about what took place during a chemical reaction?

A car rounds a 75-m radius curve at a constant speed of 18 m/s. a ball is suspended by a string from the ceiling the car and moves with the car. the angle between the string and the vertical is:

Emission of light from an atom occurs when an electron

Which is an example of transfroming potential energy to kinetic