Which of the following statements is not true: a. convection carries man-made chlorofluorocarbons (cfcs) up to the stratosphere. b. ultraviolet light from the sun dissociates the chlorine. c. chlorine acts as a catalyst that turns ozone (o3) into oxygen (o2). d. one chlorine atom destroys approximately 100 ozone molecules. e. ozone absorbs and consequently protects us from carcinogenic ultraviolet light from the sun

The graph below represents the work done by a student while running up flights of stairs. determine the student's power output after 10 seconds: 1600 j/s 8000 j/s 160 j/s 800 j/s

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

Which planet do you think would be easiest for humans to colonize some day?