3 years ago

Which statement is a characteristic of a concave lens?

Physics

2 answers:

diamong [38]3 years ago

6 0

I think the answer would be D

Trava [24]3 years ago

3 0

D. it is thickest in the middle

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castortr0y [4]

Answer: D.) 39,200 J

Via the equation of potential energy PE = mgh where m is mass, g is the average gravity on earth and h is the height. In this case m = 400 kg, g = 9.8, h = 10 m thus:

$P.E.=(400kg)(9.8\frac{m}{s^2} )(10m)=39,200 J$

P.E.= 39,200 Joules

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3 years ago

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ratelena [41]

Answer:

1.5m

Explanation:

Velocity=1500m/s

Frequency=1000hz

Wavelength =velocity ➗ frequency

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Wavelength=1.5m

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Murrr4er [49]

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Fehling's solution is added to the counters of test tube b after about 3 minutes and it turns brick red.what food substance was

hjlf

The food substance being used which turned Fehling's solution to brick red is a reducing sugar.

<h3>What is Fehling's solution?</h3>

This is an indicator which is used to test for the presence of reducing sugar or aldehydes in a solution.

Brick red precipitate of copper(I) oxide is formed when it tests positive to compounds such as glucose etc.

Read more about Fehling solution here brainly.com/question/3262179

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