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jonny [76]
3 years ago
7

Gary is trying to think of an object that could model a sunspot. His teacher tells him that such an object might be found right

on his face. Which of the following most closely models the behavior of a sunspot? A. an eyelash B. a freckle C. a birthmark D. a lip
Physics
2 answers:
alexgriva [62]3 years ago
7 0

Ans. (B). a freckle.

Sunspots can be defined as temporary phenomena on the photosphere of sun, which appears as spot darker than its surrounding regions. Freckles on the face can model the behavior of sunspots are they represent spots brown spots on skin, darker than face complexion.

Freckles are resulted due to concentrated melaninized cells, having melanin (a type of skin pigment).

Thus, the correct answer is option (B).

const2013 [10]3 years ago
6 0

the answer is B a freckle I just had this as a Study Island and got it right.

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Determine the stopping distances for a car with an initial speed of 88 km/h and human reaction time of 2.0 s for the following a
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Explanation:

Given that,

Initial speed of the car, u = 88 km/h = 24.44 m/s

Reaction time, t = 2 s

Distance covered during this time, d=24.44\times 2=48.88\ m

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We need to find the stopping distance, v = 0. It can be calculated using the third equation of motion as :

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(b) Acceleration, a=-8\ m/s^2

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s=\dfrac{-(24.44)^2}{2\times -8}

s = 37.33 meters

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Hence, this is the required solution.

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