What role do CFCs play in the catalytic destruction of ozone? (a) Ozone is destroyed upon binding to a CFC molecule that has been energized by ultraviolet light. (b) There is no strong scientific evidence that CFCs play a significant role in the catalytic destruction of ozone. (c) CFC molecules activate chlorine atoms into their catalytic action. (d) CFC molecules migrate to the upper stratosphere, where they generate chlorine atoms upon being destroyed by ultraviolet light.
What role do CFCs play in the catalytic destruction of ozone? (a) Ozone is destroyed upon binding to a CFC molecule that has been energized by ultraviolet light. (b) There is no strong scientific evidence that CFCs play a significant role in the catalytic destruction of ozone. (c) CFC molecules activate chlorine atoms into their catalytic action. (d) CFC molecules migrate to the upper stratosphere, where they generate chlorine atoms upon being destroyed by ultraviolet light.
Part C
Find the height yi
from which the rock was launched.
Express your answer in meters to three significant figures.
Learning Goal:
To practice Problem-Solving Strategy 4.1 for projectile motion problems.
A rock thrown with speed 12.0 m/s and launch angle 30.0 ∘ (above the horizontal) travels a horizontal distance of d = 19.0 m before hitting the ground. From what height was the rock thrown? Use the value g = 9.800 m/s2 for the free-fall acceleration.
PROBLEM-SOLVING STRATEGY 4.1 Projectile motion problems
MODEL: Is it reasonable to ignore air resistance? If so, use the projectile motion model.
VISUALIZE: Establish a coordinate system with the x-axis horizontal and the y-axis vertical. Define symbols and identify what the problem is trying to find. For a launch at angle θ, the initial velocity components are vix=v0cosθ and viy=v0sinθ.
SOLVE: The acceleration is known: ax=0 and ay=−g. Thus, the problem becomes one of…
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
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