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Tresset [83]
3 years ago
15

We utilized the Scientific Method while working with the Gizmo, Effect of Environment on New Life forms. Which choice lists the

steps of the Scientific Method in the correct order?
Question 1 options:

Make a hypothesis, design and run a controlled experiment, record and analyze the results, ask a question, draw conclusions, communicate results.


Ask a question, design and run a controlled experiment, make a hypothesis, draw conclusions, communicate results, record and analyze results.


Make a hypothesis, communicate results, ask a question, design and run a controlled experiment, record and analyze results, draw conclusions.


Ask a question, make a hypothesis, design and run a controlled experiment, record and analyze results, draw conclusions, communicate results.
Physics
1 answer:
zysi [14]3 years ago
4 0

It's the first one. Believe me I always missed this question in class, never is ask a question first. Hypothesis is first.

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How long will it take a 2190 W motor to lift a 1.47 x 104 g box, 6.34 x 104 mm vertically.​
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Answer:

t = 4.17 [s]

Explanation:

We know that work is defined as the product of force by distance.

W = F*d

where:

F = force [N] (units of Newtons)

d = distance = 6.34 x 10⁴ [mm] = 63.4 [m]

In order to find the force, we must determine the weight of the box, the weight can be determined by means of the product of mass by gravitational acceleration.

w = m*g

where:

m = mass = 1.47 x 10⁴ [g] = 14.7 [kg]

g = gravity acceleration = 9.81 [m/s²]

w = 14.7*9.81

w = 144.2 [N]

Therefore the work can be calculated.

W = w*d

W = 144.2*63.4

W = 9142.72 [J] (units of Joules)

Power is now defined in physics as the relationship of work at a given time

P = W/t

where:

P = power = 2190 [W]

t = time [s]

Now clearing t, we have.

t = W/P

t = 9142.72/2190

t = 4.17 [s]

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