Answer:
When you want to take a photograph with a film camera, you have to press a button. This operates a mechanism called the shutter, which makes a hole (the aperture) open briefly at the front of the camera, allowing light to enter through the lens (a thick piece of glass or plastic mounted on the front).
Explanation:
One half life 20g it will be a original grams
to respect others,valuing their perspective, and being sensitive to their concerns
This gave america more culture such as jazz in the south and more people came to america which mean't more jobs, which mean't more currency for america. Hope i helped!
Commerce Clause
A clause of the U.S. Constitution that grants Congress the power to "regulate commerce with foreign nations, and among the several states, and with Indian tribes."