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kakasveta [241]
3 years ago
7

Which weighs more: A. A large bathtub filled to the brim with water B. A large bathtub filled to the brim with water with a batt

leship floating in it C. No difference: these two options weigh the same
Physics
1 answer:
Airida [17]3 years ago
7 0

Answer:

Explanation:yes

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How is item A different from Item B?
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Can an object in motion ever change directions?
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3 years ago
If a nearsighted person has a far point df that is 3.50 m from the eye, what is the focal length f1 of the contact lenses that t
Anastaziya [24]

Answer:

f1 = -3.50 m

Explanation:

For a nearsighted person an object at infinity must be made to  appear  to be at his far point which is 3.50 m away. The image of an object at infinity must be formed on the same side of the lens as the object.

∴ v = -3.5 m

Using mirror formula,

i/f1 = 1/v + 1/u

Where f1 = focal length of the contact lens, v = image distance = -3.5 m, u =         object distance = at infinity(∞) = 1/0

∴ 1/f1 = (1/-3.5) + 1/infinity

  Note that, 1/infinity = 1/(1/0) = 0/1 =0.

∴ 1/f1 = 1/(-3.5) + 0

  1/f1 = 1/(-3.5)

Solving the equation by finding the inverse of both side of the equation.

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would be needed by the person to see an object at infinity clearly

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