Physics

I have been working on this homework question for a bit, but I just can't get it. Please help me!

Where must an object be placed with respect to a convex lens (f=20cm) to generate an upright image that is 4 times as large as the object?

10 cm in front
10 cm behind
55 cm in fromt
55 cm behind
20 cm in front
20 cm behind
15 cm in front
15 cm behind
none listed

I think 55 cm in front, but I'm not sure.

  1. 👍
  2. 👎
  3. 👁
  1. 15 cm in front

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    Given that a:b = 8:5 and b:c= 3:4 find the ratio a:b:c Give your answer in its simplest form. Show all working out. My work: 1) 5 and 3 both equal to b. 2) 8+5=13/2= 11.5 3)3+4=7/2=3.5 4)11.5+3.5= 15 All my working shown I dont

  2. Chemistry

    The question is: what is the ratio [NH3/[NH4+] in an ammonia/ammonium chloride buffer solution with pH= 10.00? (pKa for ammonia=9.25) When working the problem, I tried to solve it a bit backwards, in that I plugged in each of the

  3. Math

    I'm in seventh grade and working on this math test based on lines and planes. I'm stuck on this one question and I don't understand what the question is asking me to do. The question is: Identify a segment skew to GH. I am not

  4. Physics

    The drill bit of a variable speed electric drill has a constant angular acceleration of 2.50 rad/s^2. the initial angular speed of the bit is 5.00 rad/s. after 4.00s, (a) what angle has the bit turned through and (b) what is the

  1. english grammar help please

    I'm a bit confused as to what I would use for this sentence: The first in line at the theater were ____ Would it be "them" or "us"? Along with: Karina and ___ are working together to build the model. 1) her 2) me 3) she 4) us If

  2. ELA

    which sentence is in the imperative voice 1 how much homework do you have 2 is it important to do homework 3 do your homework as soon as you get home 4 homework should be done thoroughly i think its the 3rd one am i right?

  3. English

    Identify the sentence that varies from formal standard English. A) I did not finish my social studies homework because I had a ton of math homework. B) I did not complete my social studies homework because I was busy with my math

  4. As physics

    The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1.

  1. English 7 (please read and please help!)

    We have to write this essay for english. Here is the info. We are working on the intro for our essay B = Broad Statement I = Illustrate (Example) N = Narrow the Topic T = Thesis Statement Essay Topic * Explain how his/her (Rose

  2. As physics

    The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1.

  3. Question on essay ( Please respond?)

    Is there anyway I could email a tutor and send them a picture I scanned of my homework, because it's a bit hard to explain over words? Thanks. -Allyson

  4. Sra

    Are you going to be on for a lil bit more? Around 1-2 hours now from this post? I really need help with some french, but I have to do some other homework first. I'll check on your reply in a bit. Merci beacoupe.

You can view more similar questions or ask a new question.