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
bekas [8.4K]
3 years ago
8

For a person with a Near Point (NP) = 45 cm, what would be his prescription's lens power = _________ diopters A) 1.08 diopters

B) 2.842105 diopters C) 1.778 diopters D) 0.54 diopters E) 0.225 diopters
Physics
1 answer:
natita [175]3 years ago
7 0

Answer:

The power of lens is 2.22 D.

Explanation:

Given that,

Distance of image v= 45 cm

We know that,

Distance of object u= ∞

Power of lens is the reciprocal of focal length.

P=\dfrac{1}{f}

We need to calculate the power of lens

Using formula of lens

\dfrac{1}{f}=\dfrac{1}{v}+\dfrac{1}{u}

Where, f = focal length

v = image distance

u = object distance

Put the value into the formula

\dfrac{1}{f}=\dfrac{1}{45}+\dfrac{1}{\infty}

\dfrac{1}{f}=\dfrac{1}{0.45}+0

P=\dfrac{1}{f}=2.22

Hence, The power of lens is 2.22 D.

You might be interested in
The first mechanized industry was
Oxana [17]
C. Textiles

It was the first thing mechanized in the Industrial Revolution

3 0
3 years ago
What is the correct formula for power? A. Power = work / time B. Power = work * time C. Power = force * distance D. Power = work
steposvetlana [31]

Answer:

A. Power = Work / Time

Explanation:

Power is the amount of work done over time, or rather the rate of work, which is given by the unit of watts (W). Since work is defined by Force * Displacement, we can also say Power = Force * Displacement / Time.

3 0
3 years ago
Read 2 more answers
Use Newton’s Universal Law of Gravitation to calculate the magnitude of the gravitational force between a 200 kg refrigerator an
expeople1 [14]

Answer:

3.735×10⁻⁶ N

Explanation:

From newton' s law of universal gravitation,

F = Gmm'/r² .............................. Equation 1

Where F = Gravitational force between the person and the refrigerator, m = mass of the person, m' = mass of the refrigerator, r = distance between the person and the refrigerator. G = gravitational universal constant.

Given: m = 70 kg, m' = 200 kg, r = 0.5 m

Constant: G = 6.67×10⁻¹¹ Nm²/kg².

F = (6.67×10⁻¹¹×70×200)/0.5²

F = 93380×10⁻¹¹/0.25

F = 373520×10⁻¹¹

F = 3.735×10⁻⁶ N

Hence the force between the person and the refrigerator =  3.735×10⁻⁶ N

6 0
4 years ago
The electron dot diagram shows the arrangement of dots without identifying the element.
olasank [31]

<em>Answer: </em>tellurium (Te)

<em>atomic number = 52 ,</em>

<em>Number of energy levels = 5;</em>

              First energy level = 2

         Second energy level = 8

             Third energy level = 18

           Fourth energy level = 18

               Fifth energy level = 6

<em>In this electron configuration, 0uter most electrons are 6.</em>


5 0
3 years ago
Read 2 more answers
Which literary device portrays a character's reflections?
DochEvi [55]
Of the literary devices you provided to choose from, snap hots and thought shots are not even devices so they fall off the list.

sensory language can explain the senses the character is using - helping figure out his reflections,

but figuratve language can helop the best. the character says something figuratively and we can analyze what they meant to find out what they were thinking
6 0
3 years ago
Other questions:
  • When you set a pot of tap water on the stove to boil, you'll often see bubbles start to form well before boiling temperature is
    14·1 answer
  • Which process binds together sediment to form new rock?
    10·1 answer
  • The octet rule states that in chemical compounds atoms tend to have
    5·2 answers
  • Using average rates of money growth and inflation in the United States over many decades, Friedman and Schwartz found that decad
    13·1 answer
  • If y gets smaller as x gets bigger, x and y have a?
    12·2 answers
  • How does mass effect the speed of a forced object​
    13·1 answer
  • The _____________ variable is observed, measured, and affected by the independent variable.​
    5·2 answers
  • A car increases velocity from 30 m/s to 60 m/s in 4 seconds. Calculate the average acceleration of the car over this time.
    15·1 answer
  • What could be the possible answer to the question ?<br><br>thankyou ~​
    12·2 answers
  • If the temperature rises by 9. 9 degrees, what is the corresponding temperature increase in degrees celsius?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!