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finlep [7]
3 years ago
13

A scientific hypothesis can be disproved with a.one reproducible experiment. b.disapproval of other scientists. c.many tests by

many scientists. d.philosophical reasoning.
Physics
1 answer:
joja [24]3 years ago
6 0

Answer:

option A

Explanation:

The correct answer is option A

Reproducible experiment is a specific experimentally produced value is said to be reproducible when there is a fair degree of consistency between measurements or observations done by different people at different locations on duplicate specimens — that is, if the test value is determined to be of great accuracy.

hence, a scientific hypothesis can be disproved with one reproducible experiment.

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Consider a concave spherical mirr or that has focal length f = +19.5 cm.
lidiya [134]

The distance of an object from the mirror's vertex if the image is real and has the same height as the object is 39 cm.

<h3>What is concave mirror?</h3>

A concave mirror has a reflective surface that is curved inward and away from the light source.

Concave mirrors reflect light inward to one focal point and it usually form real and virtual images.

<h3>Object distance of the concave mirror</h3>

Apply mirrors formula as shown below;

1/f = 1/v + 1/u

where;

  • f is the focal length of the mirror
  • v is the object distance
  • u is the image distance

when image height = object height, magnification = 1

u/v = 1

v = u

Substitute the given parameters and solve for the distance of the object from the mirror's vertex

1/f = 1/v + 1/v

1/f = 2/v

v = 2f

v = 2(19.5 cm)

v = 39 cm

Thus, the distance of an object from the mirror's vertex if the image is real and has the same height as the object is 39 cm.

Learn more about concave mirror here: brainly.com/question/27841226

#SPJ1

7 0
2 years ago
Which of these best describes how an appropriate star chart is selected to locate objects in the sky?
Sergio [31]
The layout of the stars in the sky is determined by the date, time of night, and your location (mainly latitude). So to pick the best star chart, you should go with the one that's closest to the present date and your location, then make allowance for what time it is. Everything in the sky moves about a degree every 4 minutes.
6 0
3 years ago
Read 2 more answers
I really need help, dose anybody know the answer?
Keith_Richards [23]

Answer: no  

Explanation: you add the right side and if it equals the same as the left side then it is balanced.

8 0
3 years ago
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What a measurement standard is defined as?
erastovalidia [21]

Answer:

Measurement is the competion of known quantity to unknown quantity.

Explanation:

I hope that it will be right answer

7 0
4 years ago
Read 2 more answers
Sara pushes her 45 kg younger sister with a force of 300 N to the right and encounters 120 N of friction. Calculate the little s
Karo-lina-s [1.5K]
The Net force is 280 N (300-120). The acceleration = force / mass = 280 / 45 = 6.2 m/s^2
8 0
3 years ago
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