Position is measured in meters (m), so it is a base quantity.
What is base quantity?A base or fundamental quantity is a physical quantity, in which other quantities are derived from.
Example of fundamental quantities;
MassLength (position)TimeTemperatureAmount of substanceWhat is a derived quantity?Derived quantities are those quantities obtained or expressed from fundamental quantities.
Example of derived quantities;
SpeedAccelerationVolumeAreaDensity, etcThus, we can conclude that position measured in meters (m) is a base quantity.
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A transformer with X turns in primary coil and Y turns in secondary coil is used to change the magnitude of voltage to 240 V. Calculate the input voltage and name the type of transformer if Y= 2 X.
The input voltage is 120 V and the transformer is a step up transformer due to increase in the voltage induced in the secondary coil.
Input voltage
The input voltage of the transformer is the voltage of the primary coil and it is calculated as follows;
Ns/Np = Es/Ep
where;
Ns is the number of turn in the secondary coilNp is the number of turn in the primary coilEs is the secondary voltageEp is the primary voltage2X/X = 240/Ep
2 = 240/Ep
Ep = 240/2
Ep = 120 V
Thus, the transformer is a step up transformer due to increase in the voltage induced in the secondary coil.
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For light of wavelength 589 nm, calculate the critical angles for the following substances when surrounded by air.
(1) The critical angles for the fused quartz is 44⁰,
(2) The critical angles for the polystyrene is 39⁰.
(3) The critical angles for the sodium chloride is 41⁰.
What is Critical angles?In optics, the critical angle is the topmost angle at which a shaft of light traveling in one transparent medium can strike the boundary between that medium and another with a lower refractive indicator without being fully reflected within the first
Critical angles for the different medium.
θ[tex]=sin^{-1}\frac{n_{2} }{n_{1} }[/tex]
where;
[tex]n_{2}[/tex] is the refractive index of air = 1
[tex]n_{1}[/tex] is the refractive index of the given substances.
Refractive index of quartz glass = 1.46
Refractive index of polystyrene = 1.59
Refractive index of sodium chloride = 1.54
Critical angles for quartz glass:
[tex]$\theta_{\text {crit }}=\sin ^{-1} \frac{1.00029}{1.46}\\$[/tex]
[tex]$\theta_{\text {crit }}=44^{o}$[/tex]
Critical angles for polystyrene
[tex]$\theta_{\text {crit }}=\sin ^{-1} \frac{1.00029}{1.59}\\\\[/tex]
[tex]\theta_{\text {crit }}=39^{\circ}[/tex]
Critical angles for Sodium Chloride
[tex]$\theta_{\text {crit }}=\sin ^{-1} \frac{1.00029}{1.54}\\[/tex]
[tex]\theta_{\text {crit }}=41^{o}[/tex]
Thus, the critical angles for the quartz glass is 44⁰, the critical angles for the polystyrene is 39 ⁰ and the critical angles for the sodium chloride is 41⁰.
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I understand that the question you are looking for is:
"For light of wavelength 589 nm, calculate the critical angles for the following substances when surrounded by air.
(a) Fused Quartz
(b) Polystyrene
(c) Sodium chloride"
does solid give out or take in energy when it melts?
Explanation:
i think it give out energy when it melts
I NEED A SERIOUS ANSWER PLS. I WILL MARK YOU BRAINLIEST!
Answer:
The Object distance is 53.125cm. So the right option will be Option (c)
Explanation:
The converging lens has focal length positive, so it means:
f=17cm
As the real image is formed so the distance of the image will be taken as positive. Let it is represented by q, So:
q=25cm
Let the distance of object is p, it will obtained from the following formula:
A scientist is studying the outer reef section of a coral reef. what features are they likely to see?
The features the scientist is likely to see are:
A jelly-like substance referred to as mesogleaCoral PolypsBased on the fact that a coral reef is an underwater ecosystem that contains different animals and species, they contain a colony of coral polyps.
What is a Coral Reef?This refers to the underwater ecosystem that contains different animals and species.
Hence, we can see that based on the fact that a scientist is studying the outer reef section of a coral reef, he would see the distinct characteristics of the coral and these are the:
the jelly-like substance referred to as mesogleaCoral PolypsRead more about coral reefs here:
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A person of weight 600 n is standing with one foot on each of two bathroom scales. The scales readings are?
The scales readings are 300 N for each of the scale.
What is weight?The weight of an object is the force acting on the object due to gravity.
Weight is a vector quantity because it varies from place to place due to difference in acceleration due to gravity and it is measured in Newton (N).
Reading of each scaleThe total weight of the person is supported by the two legs and if the person stand on a level ground, the weight will be evenly distributed and each scale will carry half of the person's weight.
The reading of each scale due to the weight of the person is calculated as follows;
Reading of each scale = total weight / 2
Reading of each scale = 600 N/2
Reading of each scale = 300 N
Thus, the scales readings are 300 N for each of the scale.
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As a supplement to some diets, iron is consumed in tablet form. The mass of iron in these tablets is often measured in?
