3 years ago

Dont skip need help ASAP and pls hurry will give 10 pts + brainliest

Physics

2 answers:

forsale [732]3 years ago

8 0

C, believe you need to test others, can’t just test one thing with eachother several times

Gemiola [76]3 years ago

3 0

Answer:

Explanation:

In order for an experiment to be valid need to be conducted with several tested variables

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Read 2 more answers

Question 20

oksian1 [2.3K]

Answer:

The image distance is 17.56 cm

Explanation:

We have,

Height of light bulb is 3 cm.

The light bulb is placed at a distance of 50 cm. It means object distance is, u =-50 cm

Focal length of the lens, f = +13 cm

Let v is distance between image and the lens. Using lens formula :

$\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{f}+\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{13}+\dfrac{1}{(-50)}\\\\v=17.56\ cm$

So, the image distance is 17.56 cm.

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