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irina1246 [14]
3 years ago
9

Which of these is a qualitative research method?

Physics
2 answers:
Alexxandr [17]3 years ago
8 0
D laboratory observation
IgorLugansk [536]3 years ago
5 0

Answer:

A. case studies, because it's one of the 5 groups that are part of the qualitative methods

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What would be the speed of an object just before hitting the ground if dropped 91.5 meters
Aleks04 [339]

Answer:

about 42.35 m/s

Explanation:

Use the equation for accelerated motion (g), and with zero initial velocity that doesn't include time:

v_f^2=v_i^2+2\,a\,\Delta x

which for our case would reduce to:

v_f^2=v_i^2+2\,a\,\Delta x\\v_f^2=0+2\,9.8\,(91.5)\\v_f^2= 1793.4\\v_f=\sqrt{1793.4} \\v_f \approx 42.35

then the velocity just before hitting would be about 42.35 m/s

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2 years ago
How long does light take to travel from the sun to earth? heres the exact question: light travels at 300,000 km.s. The sun is a
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Communicating results allows scientists to learn from each other's results.
sveta [45]

True, scientists often talk to each other to figure out if their results were similar and what they could have done better.

Although, talking to other scientists does have risks, other scientists could copy your work and further better it.

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3 0
3 years ago
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Write whether true or false...
elixir [45]

Answer:

a --> true, b --> false, c --> true, d -->false

Explanation:

a) since it stays floating the gravity force and the upqards push is the same

b) if it's balanced the rocket won't move from the ground, the force of the rocket, has to exceed the force of gravity

c) since it's going in a diretion the force of gravity is exceeding the force pushing it up

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Answer:

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Mechanical energy is needed for movement of objects. Muscles convert chemical energy provided by the rest of the body to allow movement.

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