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adell [148]
3 years ago
9

Which would most likely form a homogenous mixture?

Physics
1 answer:
katrin2010 [14]3 years ago
6 0

Answer:

A pinch of sugar mixed with a cup of water

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A transformer has a primary voltage of 115 V and a secondary voltage of 24 V. If the number of turns in the primary is 345, how
Nata [24]

Answer:

C. 72

Explanation:

Transformer: A transformer is an electromagnetic device that uses the property of mutual inductance to change the voltage of alternating supply.

In a ideal transformer,

Vs/Vp = Ns/Np ............................................. Equation 1

Where Vp = primary voltage, Vs = secondary voltage, Ns = Secondary turn, Np = primary turn.

Making Ns the subject of the equation,

Ns =(Vs/Vp)Np .......................................... Equation 2

Given: Vs = 24 V, Vp = 115 V, Np = 345.

Substitute into equation 2

Ns = (24/115)345

Ns = 72 turns.

Thus the number of turns in the secondary = 72 turns.

The right option is C. 72

4 0
3 years ago
T/F if you were conducting this study, what other questions would you want to ask to ensure both the external and internal valid
ryzh [129]

whether or whether the conclusions apply to people whose location and circumstances differ from those of the study's participants need to asked to ensure both the external and internal validity of your results

<h3>How can external validity be guaranteed?</h3>

Broad inclusion criteria that produce a study group that more closely mimics real-life patients and, in the case of clinical trials, selecting interventions that are practical to implement can both boost external validity.

<h3>What steps would you take to make sure your study is reliable and valid?</h3>

The development of a solid study design, the selection of suitable methodologies and samples, and the meticulous and consistent execution of the research are all necessary for the reliability and validity of your findings.

Learn more about external validity here:

brainly.com/question/9292757

#SPJ4

5 0
1 year ago
Please Help!!! An engine takes 3,000 J from a hot reservoir and expels 2,400 J to a cold reservoir. What is the thermal efficien
Murljashka [212]

Answer:

80%

Explanation:

Thermal efficiency is a measure of the extent to which a heat engine is able to convert to other form. It is measure in percentage.

Thermal efficiency = \frac{E_{out} }{E_{in} } × 100%

Where E_{in} is the input energy and E_{out} is the output energy.

Given that: E_{in} = 2400 J and  E_{out} = 3000 J, therefore:

Thermal efficiency = \frac{2400}{3000} × 100%

                               = 80%

The thermal efficiency of the engine is 80%.

4 0
4 years ago
A car driving at 25 m/s, travels 318 m. How long does it take?
labwork [276]

Answer:

12.72 sec

Explanation:

The time it takes to travel a certain distance can be found by dividing the distance that needs to be travelled by the speed with which you are travelling, therefore...

Time = \frac{Distance}{Speed} = \frac{318}{25} = 12.72 sec

7 0
3 years ago
A diffraction grating has 300 lines per mm. If light of wavelength 630 nm is sent through this grating, what is the highest orde
True [87]

Answer:

The order of maximum is   n = 5

Explanation:

From the question we are told that

  The  diffraction grating is  k  =  300 lines per mm  =  300000 lines per m

   The wavelength is  \lambda  =  630 \  nm  =  630 *10^{-9} \  m

   Generally the condition for constructive interference is mathematically represented as

      dsin \theta = n  * \lambda

Here n is the order maximum

d is the distance the grating which is mathematically represented as

    d =  \frac{1}{k}

=>   d =  \frac{1}{300000}

=>    d =  3.3*10^{-6}\  m

So

   n  = \frac{dsin \theta}{ \lambda}

at maximum  sin\theta  =  1

     n  = \frac{d}{\lambda}

=>   n  = \frac{3.3*10^{-6}}{630 *10^{-9}}

=>   n = 5

 

8 0
3 years ago
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