PHYSICS MIDDLE SCHOOL

Which of these is a concave lens?

Answers

Answer 1

Answer:

Answer: The correct answer is Image 2.

Explanation:

Concave lens is defined as the lens which diverges the light falling on it. It is considered as a diverging lens.

Convex lens is defined as the lens which converges the light falling on it. It is considered as a converging lens.

Types of concave lens:

Plano-concave lens: In this one side of the lens is plane and one side is concave.
Double concave lens: In this, both the sides of the lens is concave.
Convexo-concave lens: In this, the convex face of the lens has greater degree of curvature than the concave face.

Types of convex lens:

Plano-convex lens: In this one side of the lens is plane and one side is convex.
Double convex lens: In this, both the sides of the lens is convex.
Concavo-convex lens: In this, the convex face of the lens has smaller degree of curvature than the concave face.

So, image 1 is a double convex lens, image 2 is a plano-concave lens, image 3 is a plano-convex lens and image 4 is a concavo-convex lens.

Hence, the correct answer is Image 2.

Answer 2

Answer:

Answer:

Explanation:

It's B i just took the test :)

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Neutralization _____.A.) forms an acid and a baseB.) occurs when an acid is dissolved in waterC.) occurs when a base is dissolved in waterd.) is a reaction between an acid and a base
Which scientist was the first to propose the heliocentric model of the universe? A. Aristotle B. Isaac Newton C. Galileo Galilei D. Nicolaus Copernicus
Which of the following describes the pathway that nerve impulses travel while throwing a baseball
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Identify two ways of changing the strength of an electric force

Answers

When you talk about "the strength of an electric force" in middle school, I'm pretty sure you're talking about the force between two electrostatic charges that either pulls them together or pushes them apart.

The strength of that force depends on

-- the product of the amounts of charges on the two charged objects

-- the distance between the centers of their charges.

magnetism and an increase/decrease in temperature

Make the following prefix conversions. 2 km = cm

Answers

Answer:

200000 cm are in 2 km

Explanation:

Answer:

200000 cm are in 2 km

hope this helps pls make this the brainliest

Which of these elements is least likely to react with other elements A. calcium 
B. Argon 
C. sodium 
D. Nitrogen 
E. Oxygen 
F. Chlorine

Answers

B. Argon because it is a noble gas and has 8 valence electrons. Noble gases are very very stable and rarely react with other elements.

A source of wave produces 20 crest sand 20 troughs in 0.4 sec. Find the frequency of the wave.

Answers

1 whole wave is 1 crest and 1 trough.

20 crests and 20 troughs is 20 whole waves.

20 waves / 0.4 seconds = 50 waves per second.

Frequency = 50 Hz

All of the following require breaking informing chemical bonds exceptlighting a campfire
breaking a rock
baking a potato
rotting fruit

Answers

i think that the answer it's looking for is "breaking a rock" as a physical change, the rest being chemical changes.
Mind you, were I to be picky, I'd try to argue that breaking a rock breaks whatever bond is holding the rock together. ....

1. Go onto the Newsround website or article2. Search "School girl banned for Muslim dress"
Answer this question:
Who is Sobia?

Answers

I cant find a article with that name? Are you sure its right?

Answer:

I read the article - the story was really sad.

Explanation:

- sincerelynini