You Are a Fireworks-Launcher,and Launch a Fireworks Shell into the Air

question 36

Multiple Choice

You are a fireworks-launcher,and launch a fireworks shell into the air directly above you with an initial speed of 227 m/s.If it explodes at the top of its trajectory,how long after launch do you hear the explosion? Assume 343 m/s for the speed of sound.

• A)23.1 s
• B)30.8 s
• C)38.6 s
• D)46.1 s
• E)None are correct.

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Definitions:

Facial

Concerning treatments or care applied to the face, often for cosmetic or health reasons, emphasizing skin health and appearance.

Smile

A facial expression formed by flexing the muscles at the sides of the mouth, often expressing happiness or pleasure.

Light Pupillary Reflex

The light pupillary reflex is the involuntary constriction of the pupil in response to light exposure, helping to protect the retina from excessive light damage.

Constriction

Constriction refers to the narrowing of a passage or vessel, often as a response to nerve signaling or chemical stimuli.