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

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference

Frequency of electromagnetic waves that a radio station is assigned is called

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s