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Lapatulllka [165]
3 years ago
14

Constructive interference leads to _________.

Physics
1 answer:
Minchanka [31]3 years ago
6 0
D
the waves are in phase. crests come together to form bigger crests hence higher amplitude
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A projectile is launched straight up from a height of 960 feet with an initial velocity of 64 ft/sec. Its height at time t is h(
Natasha2012 [34]

Answer:

a) t=2s

b) h_{max}=1024ft

c) v_{y}=-256ft/s

Explanation:

From the exercise we know the initial velocity of the projectile and its initial height

v_{y}=64ft/s\\h_{o}=960ft\\g=-32ft/s^2

To find what time does it take to reach maximum height we need to find how high will it go

b) We can calculate its initial height using the following formula

Knowing that its velocity is zero at its maximum height

v_{y}^{2}=v_{o}^{2}+2g(y-y_{o})

0=(64ft/s)^2-2(32ft/s^2)(y-960ft)

y=\frac{-(64ft/s)^2-2(32ft/s^2)(960ft)}{-2(32ft/s^2)}=1024ft

So, the projectile goes 1024 ft high

a) From the equation of height we calculate how long does it take to reach maximum point

h=-16t^2+64t+960

1024=-16t^2+64t+960

0=-16t^2+64t-64

Solving the quadratic equation

t=\frac{-b±\sqrt{b^{2}-4ac}}{2a}

a=-16\\b=64\\c=-64

t=2s

So, the projectile reach maximum point at t=2s

c) We can calculate the final velocity by using the following formula:

v_{y}^{2}=v_{o}^{2}+2g(y-y_{o})

v_{y}=±\sqrt{(64ft/s)^{2}-2(32ft/s^2)(-960ft)}=±256ft/s

Since the projectile is going down the velocity at the instant it reaches the ground is:

v=-256ft/s

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Heyyy hope this helps

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This photograph shows a person using a type of wave technology. Which need or want does this technology meet?
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The photography that shows a person using a type of wave technology, allows people to see very small objects clearly. D as it is a microscope

<h3>Why are wave technologies important?</h3>

Wave technologies are important because;

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Thus, the photography that shows a person using a type of wave technology, allows people to see very small objects clearly. D as it is a microscope.

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What is the cheetah's average speed for the first 3.11 s of its sprint? for the second 3.11 s of its sprint?
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