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3 years ago

how does the use of standard units of measurement solve problems in measurement regarding validity and reliabiility? explain it

Physics

1 answer:

sukhopar [10]3 years ago

6 0

Answer:

Reliability can be estimated by comparing different versions of the same measurement. Validity is harder to assess, but it can be estimated by comparing the results to other relevant data or theory.

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Aleksandr [31]

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when the ground is very hot and the air is cool.

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3 years ago

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2 years ago

The siren on an ambulance emits a sound of frequency 2.80×103Hz. If the ambulance is traveling at 26.0 m/s (93.6 km/h or 58.2 mi

Norma-Jean [14]

To solve this problem it is necessary to apply the concepts related to the described wavelength through frequency and speed. Mathematically it can be expressed as:

$\lambda = \frac{v}{f}$

Where,

$\lambda =$ Wavelength

f = Frequency

v = Velocity

Our values are given as,

$f = 2.8*10^3Hz$

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Keep in mind that we do not use the travel speed of the ambulance because we are in front of it. In case it approached or moved away we should use the concepts related to the Doppler effect:

Replacing we have,

$\lambda = \frac{340}{2.8*10^3}$

$\lambda = 0.1214m$

Therefore the frequency that you hear if you are standing in from of the ambulance is 0.1214m

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3 years ago

What is motion and explain also<br>

N76 [4]

Answer:

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Explanation:

In physics, motion is the phenomenon in which an object changes its position over time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time.

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3 years ago

An engine takes in 2400 J of heat, and rejects 1880 J of heat into the air. What is the efficiency of the engine? (No Unit)

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Answer:

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Explanation:

In attached image

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3 years ago

how does the use of standard units of measurement solve problems in measurement regarding validity and reliabiility? explain it​

how does the use of standard units of measurement solve problems in measurement regarding validity and reliabiility? explain it