Why is the ozone layer in Earth's atmosphere important to life on its surface?
What will be an ideal response?
The ozone layer in the upper atmosphere protects the lower atmosphere and Earth's surface from harmful solar UV photons.
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The property of growth and development appears to be
A) a necessary condition, but not a sufficient condition for life B) a sufficient condition, but not a necessary condition for life C) both a necessary condition and a sufficient condition for life D) neither a necessary condition nor a sufficient condition for life
Calculate the light intensity 1.51 m from a light bulb that emits 100 W of visible light, assuming that the light radiates uniformly in all directions
A) 3.49 W/m2 B) 4.01 W/m2 C) 43.9 W/m2 D) 50.5 W/m2
When two bodies of different masses collide, the impulses they exert on each other are
a. equal for all collisions. b. equal but opposite for all collisions. c. equal but opposite only for elastic collisions. d. equal but opposite only for inelastic collisions. e. equal but opposite only when the bodies have equal but opposite accelerations.
A 40 watt fluorescent bulb is rated for use in a 120 volt line. During a brownout the actual voltage drops to 102 V. The actual power dissipated in the bulb under these conditions is
A. 30.0 W. B. 47.1 W. C. 28.9 W. D. 0.283 W.