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USPshnik [31]
3 years ago
7

An experiment measures the growth of crystals in a liquid solution aboard the space shuttle. A collection of bottles has the liq

uid in varying strength, or concentration of the tested substance. What would be a control observation in this experiment?
A. the bottle with 0% concentration
B. the bottle with the weakest concentration
C. the bottle with the strongest concentration
D. the bottle with the medium amount of concentration
Physics
2 answers:
Fantom [35]3 years ago
7 0

the control would be A. the bottle with 0% concentration, because you're not changing anything.

gayaneshka [121]3 years ago
7 0

Answer:

A. the bottle with 0% concentration

Explanation:

In teh bottle with the 0% concentration you can create a control observation of the experiement to see how it beheaves even if it has no concentration and if it really depend on the substance added or is something that happens naturally in those environments.  Remember that when doing experiments you should always have a sample of the subject that is given nothing in order to observe the normal behaviour of the subject under no studies.

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snow_tiger [21]
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F=G*m1m2/R^2
but we now that F=ma
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3 years ago
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Which example possesses mechanical potential energy?. A. a taut guitar string. B. an oscillating pendulum. C. a roller coaster r
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The wavelength of the light is 0.63 micrometers. How much of this length stays in 1 centimeter
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A shaving or makeup mirror is designed to magnify your face by a factor of 1.40 when your face is placed 20.0cm in front of it
Dennis_Churaev [7]

Answer:

(a) convex mirror

(b) virtual and magnified

(c) 23.3 cm

Explanation:

The having mirror is convex mirror.

distance of object, u = - 20 cm

magnification, m = 1.4

(a) As the image is magnified and virtual , so the mirror is convex in nature.

(b) The image is virtual and magnified.

(c) Let the distance of image is v.

Use the formula of magnification.

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Use the mirror equation, let the focal length is f.

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Radius of curvature, R = 2 f = 2 x 11.67 = 23.3 cm

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