4 years ago

Which statement best describes the common features of sound waves and light waves

Physics

1 answer:

Viktor [21]4 years ago

7 0

Sound waves or bounces off the wall and light waves are waves of light

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3 years ago

You are piloting a helicopter which is rising vertically at a uniform velocity of 14.70 m/s. When you reach 196.00 m, you see Ba

BlackZzzverrR [31]

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7.97 seconds

Explanation:

Distance to travel is 196-1.7=194.3m

Considering that this is vertical motion then using the equation of motion

$s=-ut+0.5at^{2}$ where s is the distance to travel, u is initial velocity, t is timw and g is acceleration due to gravity

Substituting s for 194.3, u for 14.7 m/s and a for 9.8

$194.3=-14.7t+0.5*9.8*t^{2}$

$4.9t^{2}-14.7t-194.3=0$

This is a quadratic equation which is in the form of $ax^{2}+bx+c$ then to solve x we use quadratic formula

t=(14.7+\sqrt (14.7^{2}-(4*4.9*-194.3))/(2*4.9)

t=7.97 seconds

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3 years ago