1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Kamila [148]
3 years ago
5

PLZ ANSWER

Chemistry
1 answer:
satela [25.4K]3 years ago
7 0

Answer:

B. The student should model a convex lens because it directs light toward the center of the lens.

Explanation:

Lenses are optical devices that work on the principle of refraction.

Refraction is a phenomenon of wave (such as light waves) that occurs when a ray of light crosses the interface between two mediums with different optical density: when this occurs, the ray of light bends and change speed.

In particular, there are two types of lenses:

  • Convex lenses: these lenses are curved outward at their center, therefore the rays of light coming from infinite distance (parallel to the axis) are all focused into a point of the lens, called principal focus. Therefore, a convex lens directs lights towards this point.
  • Concave lenses: these lenses are curved inward at their center, therefore the rays of light coming from infinite distance are bent away from the principal focus. Therefore, this is a diverging lens, as the rays of light do not converge.

So, the correct answer is

B. The student should model a convex lens because it directs light toward the center of the lens.

You might be interested in
3. How many moles are 7.32 x 102<br> atoms of phosphorous?
stealth61 [152]
Need more context maybe put a picture or explain a little more
3 0
3 years ago
Read 2 more answers
A dachshund walked 20 meters in 30 minutes. Calculate the speed. Provide your
steposvetlana [31]
40 mph becaus 30minute x2 is an hour which turns 20 into 40
7 0
3 years ago
Define cation and anion. In which case are electrons gained? Lost?
inn [45]

Explanation:

A cation is a positively charged ion.

An anion is a negatively charged ion.

  • In a cation, electrons are usually lost
  • In an anion, electrons are usually gained.

In an atom, the balance between the number of protons and electrons determine whether they become an anion or cation.

Protons are positively charged particles.

Electrons are negatively charged

 When an atom gains electrons, the number of electrons becomes more than that of protons. This leaves a net negative charge on the atom and it makes an anion.

 When an atom loses electrons, the number of protons becomes more than that of electrons. This leaves a net positive charge on the atom and makes a cation.

5 0
3 years ago
How many moles of pcl5 can be produced from 23.0 g of p4 (and excess cl2)? express your answer to three significant figures and
NeX [460]
Balance Chemical equation is,

                                         P₄  +  10 Cl₂   →   4 PCl₅

According to Balance Equation,

            123.89 g (1 mole) of P₄ reacts to produce   =   4 Moles of PCl₅
Then,
    23 g of P₄ will react with excess Cl₂ to produce   =   X moles of PCl₅

Solving for X,
                                      X  =  (4 mol × 23 g) ÷ 123.89 g

                                      X  =  0.742 g of PCl₅
Result:
           
When 23 g of P₄ is reacted with excess Cl₂, 0.742 g of PCl₅ is produced.
4 0
4 years ago
Which compound is a saturated hydrocarbon?<br> A) 2-pentanone B) 2-pentene C) pentane D) pentanal
lesya692 [45]
The answer is the first one because it’s a compound of two words separate when you say it :) hope this helps !
7 0
3 years ago
Other questions:
  • 1. How much 6.0 M HNO3 is needed to neutralize 39 mL of 2.0 M KOH?
    10·1 answer
  • When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____?
    12·1 answer
  • A 115.0-g sample of oxygen was produced by heating 400.0 g of potassium chlorate. 2KClO3 mc019-1.jpg 2KCI + 3O2 What is the perc
    9·2 answers
  • Chemical substances that alter perceptions and moods are called ________ drugs.
    10·2 answers
  • PRoblem 1: For which of the following activities might you want to hire a chemist?
    15·1 answer
  • Which statement about the electron cloud model is ttue
    5·2 answers
  • Which one A, B, C,D,E,F
    15·1 answer
  • Predict the missing component of each reaction.<br> ? + 2NaBr → 2NaC1+Brz<br> онСІ<br> ch<br> Na
    14·2 answers
  • 1. Which law is associated with inertia?
    6·1 answer
  • Which letter pattern best represents seafloor spreading? (Hint: Letter "f" represents the mid-
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!