haym1MoAttevacsp haym1MoAttevacsp

03-07-2016
Physics

contestada

an object is 25 cm away from a convex len.the height of the image is twice the height of the object.find it's focal length.

Respuesta :

olemakpadu olemakpadu

07-07-2016

Object distance = 25cm, u = 25cm

Image = 2 = v/u; v = 2*u = 2*25 = 50cm

By mirror formula:

1/u + 1/v = 1/f

1/25 + 1/50 = 1/f

1/f = 1/25 + 50

1/f = (2 + 1)/50

1/f = 3/50

f = 50/3

f ≈ 16.667 cm

Answer Link

Otras preguntas

What are the advantages of a democracy

(08.03)Consider the following set of equations: Equation R: -3y = -3x - 9 Equation S: y = x + 3 Which of the following best describes the solution to the given

quotient of -72 and -12

Help please lol >.< D; !!!!

Twelve monkeys ate ten bananas each day for three weeks.How many bananas were eaten in all

If ƒ(x ) = 3x + 1, then ƒ(a + h ) - ƒ(a ) =

What is the purpose of eyelids on amphibians? A.)hide from predators B.)keep the eyes moist C.)see more clearly D.)none of the above I think its C. for water

Which statements are true when using algebra tiles to solve the equation 8x + (–4) = 11x + 5? Check all that apply. Add 8 negative x-tiles to both sides of th

How long did Pontiac’s War last? a. five weeks b. less than six months c. less than two years d. five years

The function f ( x ) = 3 x is often referred to as the "tripling function" because f ( x ) triples whenever x changes by 1. Give two more distinct examples of t