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3 years ago

7

All of the following are possible sources of error in a scientific investigation except for

2 answers:

nikdorinn [45]3 years ago

5 0

Answer:

The answer is A). Having a control group is usually a very beneficial thing for an experiment. Hope this helps! :)

AnnZ [28]3 years ago

5 0

Answer:

The correct answer will be option-having a constant in your experiment.

Explanation:

A scientific investigation is a systematic approach to understand and explain the natural phenomenon that takes place in nature.

The recording of accurate data plays an important role in the scientific investigation as the results prove or disprove the predicted hypothesis through experiment.

The error in collection of data can cause the error in drawing the conclusions from the results and the most possible sources of error in data could be the incorrect and wrong way of measurement and having no replicas or trials of the sample.

The constant variable does not influence the conclusion as it is kept constant and thus is the correct answer.

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A spaceship is traveling through deep space towards a space station and needs to make a course correction to go around a nebula.

expeople1 [14]

Answer:

Magnitude = 3.64 × $10^6$

စ = 43.9°

Explanation:

given data

ship to travel = 1.7 × $10^6$ kilometers

turn = 70°

travel an additional = 2.7 × $10^6$ kilometers

solution

we will consider here

Px = 1.7 × $10^6$

Py = 0

Qx =2.7 × $10^6$ cos(70)

Qy= 2.7 × $10^6$ sin(70)

so that

Hx = Px + Qx ............1

Hx = 2.62 × $10^6$

and

Hy = Py + Qy ..........2

Hy = 2.53 × $10^6$

so Magnitude = $\sqrt{((2.62 \times 10^6 )^2+(2.53 \times 10^6)^2)}$

Magnitude = 3.64 ×

so direction will be

tan စ = Hy ÷ Hx ......................3

tan စ = $\frac{2.53}{2.62}$

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3 years ago

Greatest to least 56.2,56.32,56.321

Juli2301 [7.4K]

56.321, 56.32, 56.2 is the answer

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3 years ago

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Answer:

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Explanation:

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4 years ago

A 5.0 g coin is placed 15 cm from the center of a turntable. The coin has static and kinetic coefficients of friction with the t

Kaylis [27]

Answer:

Angular speed will reach 6.833rad/s before the coin starts slipping

Explanation:

There is no question but I'll asume the common one: Calculate the speed of the turntable before the coin starts slipping.

With a sum of forces:

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$Ff=m*V^2/R$

At this point, friction force is maximum, so:

$\mu*N=m*V^2/R$

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Solving for V:

$V=\sqrt{\mu*g*R}$

V=1.025 m/s

The angular speed of the turntable will be:

ω = V/R = 6.833 rad/s This is the maximum speed it can reach before the coin starts slipping.

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