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
padilas [110]
2 years ago
11

A converging lens has a focal length of 20 cm. An object 1 cm tall is placed 10 cm from the center of the lens. What is the heig

ht of the image? (note: solve for the image distance first)
Physics
1 answer:
SCORPION-xisa [38]2 years ago
3 0

Answer: 2 cm

Explanation:

Given , for a converging lens

Focal length : f=20\ cm

Height of object : h=1\ cm

Object distabce from lens : u=-10\ cm

Using lens formula: \dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}, we get

\dfrac{1}{20}=\dfrac{1}{v}+\dfrac{1}{10}, where v = image distance from the lens.

On solving aboive equation , we get

\dfrac{1}{v}=\dfrac{1}{20}-\dfrac{1}{10}=\dfrac{1-2}{20}=\dfrac{-1}{20}\Rightarrow\ v=-20\ cm

Formula of Magnification : m=\dfrac{v}{u}=\dfrac{h'}{h} , where h' is the height of image.

Put value of u, v and h in it , we get

\dfrac{-20}{-10}=\dfrac{h'}{1}\\\\\Rightarrow\ h'=2\ cm

Hence, the height of the image is 2 cm.

You might be interested in
Rachel is in a car that was struck by lightning. is she safe?
Eduardwww [97]

yes she is very safe inside

5 0
2 years ago
Read 2 more answers
In which direction does centripetal force act on an object
Gwar [14]
In a circle or circular motion
5 0
3 years ago
Read 2 more answers
a female vocalist with a soprano voice can sing as high as 1000 hz. given that the speed of sound is 345 m/s what is the wavelen
Neporo4naja [7]

0.345 m.

<h3>Explanation</h3>

The wavelength is the distance that the wave travels in each cycle. The wave travels 345 meters in each second. Let the wavelength of this wave be \lambda. That's the distance the wave travels in one cycle.

The frequency of the sound wave is 1 000 Hz, meaning that there are 1 000 cycles in each second. The wave travels a distance of 1 000 wavelengths in one second. That would be a distance of 1,000\;\lambda.

From the speed of the wave, the wave travels 345 meters in one second. In other words,

1,000\;\lambda = 345.

\lambda = \dfrac{345}{1,000} = 0.345\;\text{m}.

To generalize:

\lambda = \dfrac{v}{f},

where

  • \lambda wavelength of the wave,
  • v the speed of the wave, and
  • f the frequency of the wave.
3 0
3 years ago
If Noah runs three laps around a 200 meter track in two minutes, what is the average speed of Noah in m/s?
devlian [24]
• 3 laps of 200 meter track = 600 meters
• 600 meters ran in 2 minutes
• 2 minutes = 120 seconds
• 600 meters / 120 seconds = 5 m/s on average
6 0
2 years ago
electricity costs 10p per kWh. At the start of the last month, Electricity meter reading was 5000 kWh, at the end of the month i
Vesna [10]

answer

200

Explanation:

5000-5200=200

8 0
2 years ago
Other questions:
  • In the simple Bohr model of the eighth excited state of the hydrogen atom, the electron travels in a circular orbit around a fix
    5·1 answer
  • The resistor potential is constant and the inductor emf increases. The resistor potential is constant and the inductor emf decre
    13·1 answer
  • The visible light spectrum ranges between
    15·2 answers
  • You are asked to construct a mobile with four equal m = 141 kg masses, and three light rods of negligible mass and equal lengths
    9·1 answer
  • Physics help me pleaseee
    8·1 answer
  • Why is mercury not suitable as the liquid in the U-tube? (the relationship between density of the liquid and the pressure in the
    10·1 answer
  • FCFrdfAQefgEwdfgedfsaewfdedasfewreagargferdfares
    11·2 answers
  • Given that the rms of a helium atom at a certain temperature is 1350 m s-1, determine the rms speed of an oxygen molecule at thi
    13·1 answer
  • Which type of electricity moves along a pathway to turn on a light?
    12·1 answer
  • A spaceship travels at approximately 0. 25c with respect to earth. this means 24 hours at the spaceship will be x hours to us on
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!