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
cricket20 [7]
3 years ago
12

A converging lens has the focal length of 25 cm. A 10-cm object is placed at 30 cm in front of the lens. How far is the image fr

om the lens? What is the size of the image?
Physics
1 answer:
Rina8888 [55]3 years ago
6 0

Explanation:

Given that,

Focal length of a converging lens, f = +25 cm

Size of the object, h = 10 cm

Object distance, u = -30 cm

We need to find the image distance and the size of the image.

Using lens formula, \dfrac{1}{v}-\dfrac{1}{u}=\dfrac{1}{f}, v is image distance

\dfrac{1}{v}=\dfrac{1}{f}+\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{25}+\dfrac{1}{(-30)}\\\\v=150\ cm

Magnification,

m=\dfrac{v}{u}=\dfrac{h'}{h}

h' is the size of image

h'=\dfrac{vh}{u}\\\\h'=\dfrac{150\times 10}{(-30)}\\\\h'=-50\ cm

So, the image distance is 150 cm the size of image is 50 cm.

You might be interested in
As part of an exercise program, a woman walks south at a speed of 2.00 m/s for 60.0 minutes. She then turns around and walks nor
Anastaziya [24]

Answer:

Option A

Solution:

As per the question:

The distance covered by the woman in the North direction, d = 3000 m

Time taken to travel in North direction, t = 25.0 min = 1500 s

Velocity of woman in the south direction, v = 2.00 m/s

Time taken in the south direction, t' = 60.0 min = 3600 s

Now,

The distance covered in the south direction, d' = vt' = 2.00\times 3600 = 7200\ m

Now, the total displacement is given by:

D = d' - d = 7200 - 3000 = 4200 m in South

(a) Average velocity of the woman in the whole journey is given by:

v_{avg} = \frac{Total\ displacement}{Total\ time} = \frac{4200}{t + t'}

v_{avg} = \frac{4200}{1500 + 3600} = 0.8235\ m/s ≈ 0.824 m/s South

6 0
3 years ago
What is the net force on these free body diagrams?
pentagon [3]

A

The horizontal force cancels out. The two 4Ns go in opposite directions. So they don't affect the outcome.

The Vertical force is 6N up - 2 N down = 4 N Up

Answer 4 N up

B

The horizontal and vertical forces cancel out. Each gives 3N - 3N =0

The net force is 0

C

You only have horizontal forces on this one

5N - 3N = 2N  

The answer is 2N to the right.

7 0
3 years ago
Read 2 more answers
Hita's Question Bank- CTEVT<br>Baishakh] Q.No. 12 What is radiocarbon dating?<br>VER QUESTIONS​
gregori [183]

"Radiocarbon dating is a method for determining the age of an object containing organic material by using the properties of radiocarbon."

4 0
2 years ago
Read 2 more answers
A washing machine sits on the floor. How can you increase the force of friction on the washing machine without changing the surf
Vladimir79 [104]

Answer:

Push the washing machine harder onto the surface it sits upon, increasing friction between the two.

Explanation:

3 0
3 years ago
A magnifier has a magnification of 8 x. How far from the lens should an object be placed so that it’s virtual image is at the ne
larisa86 [58]

The distance of the object from the lens is 3.12 cm.

<h3>What is magnification?</h3>

Magnification is the process of of enlarging an apparent size of an object.

<h3>Object distance</h3>

The object distance is calculated using the following lens formula;

M = \frac{V}{U}

where;

  • M is the magnification
  • V is the image distance
  • U is object distance

- 8 = \frac{-25}{U} \\\\U = \frac{-25}{-8} \\\\U = 3.12 \ cm

Thus, the distance of the object from the lens is 3.12 cm.

Learn more about object distance here: brainly.com/question/24894435

8 0
2 years ago
Other questions:
  • Define the difference between the rigid body problem and a single particle problem.
    9·1 answer
  • A large magnetic flux change through a coil must induce a greater emf in the coil than a small flux change. A) True B) False
    7·1 answer
  • One object is at rest, and another is moving. The two collide in a one-dimensional, completely inelastic collision. In other wor
    13·1 answer
  • A physical property that describes how something feels<br> Is called?
    10·1 answer
  • (a) Consider the initial-value problem dA/dt = kA, A(0) = A0 as the model for the decay of a radioactive substance. Show that, i
    11·1 answer
  • A ball is thrown vertically upwards with a velocity of 20 m s −1 from the top of a multistorey building of 25 m high. How high w
    8·1 answer
  • How do we find work from a force-displacement graph when the force exerted<br> is not constant?
    11·1 answer
  • What happens when a glass rod and silk cloth are rubbed with each other?
    13·2 answers
  • Which explanation is least likely to be evidence for geological processes changing Earth's surface?
    14·2 answers
  • Please help I need this fast
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!