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elena-14-01-66 [18.8K]
3 years ago
6

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

Physics
2 answers:
Fynjy0 [20]3 years ago
8 0
D.
The reading between 7N and 8N would have to be 7.5N. Answers A and B are much to small and answer C is way to big.
vesna_86 [32]3 years ago
7 0

A, B, or C are not between 7 and 8.  So it must be D .

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A 2 cm tall object is placed 30cm in front of a concave mirror with focal length of 25 cm. What is the height of the image?
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Answer:

- 10 cm

Explanation:

h_{o} = height of the object = 2 cm

h_{i} = height of the image

d_{o}  = distance of the object from the mirror = 30 cm  

f  = focal length of the mirror = 25 cm  

d_{i}  = image distance

using the mirror equation

\frac{1}{d_{o}} + \frac{1}{d_{i}} = \frac{1}{f}

\frac{1}{30} + \frac{1}{d_{i}} = \frac{1}{25}

d_{i} = 150 cm

using the equation

\frac{h_{i}}{h_{o}} = \frac{- d_{i}}{d_{o}}

\frac{h_{i}}{2} = \frac{- 150}{30}

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<h2>Answer: The <u>height</u> of a sound wave determines its <u>loudness</u>  </h2>

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A shot putter heaves a 7.26kg shot with final velocity of 7.50m/s what is kinetic energy?
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