3 years ago

An environmental scientist performs research to discover what is in the solid

Physics

2 answers:

xxMikexx [17]3 years ago

8 0

Answer:

D i took the test

Explanation:

Sholpan [36]3 years ago

8 0

Answer:

The answer is D.

Explanation:

The other ones just don't make sense. AT ALLLLLL!!!!!!!!!!!!!!!!!!!!!!!

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Answer:

(I)

${ \bf{ {v}^{2} = {u}^{2} - 2as }} \\ {v}^{2} = {0}^{2} - (2 \times 0.5 \times 5) \\ {v}^{2} = 5 \\ { \tt{final \: velocity = 2.24 \: {ms}^{ - 1} }}$

(ii)

${ \bf{v = u + at}} \\ 2.24 = 0 + (0.5t) \\ { \tt{time = 4.48 \: seconds}}$

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3 years ago

Which term refers to a variable that a scientist adjusts during an experiment

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Responding variable

Explanation:

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3 years ago

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3 years ago

You want to build a search light. The search light is to have an outgoing parallel beam. You have a small, very bright light (a

andrew11 [14]

Answer:

1 m

Explanation:

Given

The mirror is a concave mirror.

Radius of curvature = 2 m

Now, for a parallel beam after reflection occurs, the object should be placed at the focus of the mirror.

We know, focal length = radius of curvature / 2

= 2 / 2

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3 years ago

If the period of a clock signal is 500 ps, the frequency is:_____

NNADVOKAT [17]

Answer:

The frequency of the signal is 2 GHz

Explanation:

Given;

period of the clock signal, T = 500 ps = 500 x 10⁻¹² s

the frequency of the signal is given by;

$F= \frac{1}{T}\\\\F = \frac{1}{500*10^{-12}}\\\\F = 2*10^{9} \ Hz$

F = 2 GHz

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4 years ago