Two gases and are found in the atmosphere in only trace amounts because they decompose quickly. when exposed to ultraviolet light the half-life of is , while that of is . suppose an atmospheric scientist studying these decompositions fills a transparent flask with and and exposes the flask to uv light. initially, the partial pressure of is greater than the partial pressure of .

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain