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3 years ago

When developing an experiment design, which could a scientist take to improve the quality of the results?

Physics

1 answer:

Bad White [126]3 years ago

3 0

The options missing are;

A. Make only a few changes to the manipulated variable.

B. Identify any biases about the answer to the scientific question.

C. Include as many details as possible when writing the conclusion.

D. Share her ideas through peer review.

Answer:

B. Identify any biases about the answer to the scientific question.

Explanation:

Since the question is asking what can be done to improve the quality of the results, it means what can the scientist do to make sure that the result answers the question properly and has little or no biases.

Thus, looking at the options, the only one that comes close to actually improving on the quality of the results before finalizing is option B where the scientist is to identify any biases.

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How is it possible that only 92 elements are found in the natural world but there are millions of different types of molecules?

Katena32 [7]

Answer:

92 elemns in mendeleef oisv

bitly coin download

Explanation:

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3 years ago

Suppose a 50 turn coil lies in the plane of the page in a uniform magnetic field that is directed into the page. The coil origin

Ilia_Sergeevich [38]

Answer:

EMF = 108.3 Volts

Explanation:

As per Faraday's law of electromagnetic induction we know that rate of change in magnetic flux will induce EMF in closed loop

So it is given as

$EMF = N\frac{d\phi}{dt}$

$EMF = N\frac{BA - 0}{\Delta t}$

now we know that

N = 50 turns

B = 1.5 T

A = 0.325 m^2

$\Delta t = 0.225 s$

now we have

$EMF = (50)(\frac{1.5\times 0.325}{0.225})$

$EMF = 108.3 Volts$

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4 years ago

You hear a sound with a frequency of 256 Hz. The amplitude of the sound increases and decreases periodically: It takes 2 seconds

Fiesta28 [93]

These 255.75 Hz and 256.25 Hz sounds can be thought of as a sum of two waves with frequencies.

Answer: Option A

<u>Explanation:</u>

To solve this, it is necessary to take into account the concepts related to frequency and period, and how they are related to each other.

Let frequency of beat = f

The relationship that defines both agreements is given by the equation,

$f=\frac{1}{T}$

Then the frequency for the previous period given (2sec) is

$f=\frac{1}{2}=0.5$

The beat frequency of two frequencies is equal to the difference between the two frequencies, then

$f=\left|f_{1}-f_{2}\right|$

$f=|255.75-256.25|=0.5 H z$

Hence, Option A is correct.

Similarly we can check like these for other options too as below,

For option B, $f=|255.5-256.5|=1 Hz$ .

For Option C, $f=|255-257|=2 H z$

For Option D, $f=|254-258|=4 H z$

For Option E, $f=|256-2|=254 H z$

Therefore, the sum of the frequencies in the sound wave would be 256.25Hz and 255.75Hz.

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3 years ago

Calculate the linear momentum per photon,energy per photon, and the energy per mole of photons for radiation of wavelength; (a)

LuckyWell [14K]

Answer:

The detailed explanations is attached below

Explanation:

What is applied is the De brogile equation and the equation showing a relationship between Energy, speed of light and wavelength.

The explanation is as attached below.

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3 years ago

What is a key difference between an electrolytic cell and a voltaic cell?

sineoko [7]

<span>The major difference is the presence or absence of external energy source. In an electrolytic cell, one does not need an outside source of energy like a battery while in a voltaic cell the reaction occurs simultaneously, or without help. The other major difference is that in an electrolytic cell, the flow of electrons is from positive(cathode) to negative(anode). In a voltaic cell the flow of electrons is from negative(anode) to positive(cathode).</span>

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3 years ago

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