Astudent wonders if the bubbles on this water plant are often gas o2. however identifying a gas as o2 with direct evidence requires many kinds of equipment. which observation would provide indirect evidence that supports a hypothesis that the bubbles are o2. a. an increase in bubbles on the plant when it is moved under a brighter light b. a description of the shape of each leaf after a plant is kept under did light c. a decrease in approximate size of each leaf on plants kept in darkness d. a count of the bubbles produced over time by one plant under bright light

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc