Can someone explain to me how to do this problem ?
1 answer:
Answer:
The image distance is 13.3 cm ⇒ answer B
Explanation:
* Lets study the information in the problem
- The distance between the object and the convex lens is 40.0 cm
- The lens focuses light at a distance of 10.0 cm
- The equation of the image distance is
where di is the image distance, do is the object distance and f is the
distance of the focuses lens
* Lets solve the problem
∵ do = 40.0 cm
∵ f = 10.0 cm
∵
- Substitute the values of do and f in the equation
∴
∴ di = 13.3333 ≅ 13.3 cm
* The image distance is 13.3 cm
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Answer:
1 x 10¹⁷
Explanation:
Given data:
Radius of the earth = 6000km
Radius of an atom = 60pm
Now, how many orders is the radius of the earth larger than an atom
Solution:
To solve this problem, let us express both quantity as the same unit;
1000m = 1km
6000km = 6000 x 10³m = 6 x 10⁶m
60pm;
1 x 10⁻¹²m = 1pm
60pm = 60 x 1 x 10⁻¹²m = 6 x 10⁻¹¹m
Now;
The order: = 1 x 10¹⁷
Answer:
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