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levacccp [35]
3 years ago
5

As scientists learn more what happens to scientific ideas?

Physics
2 answers:
blsea [12.9K]3 years ago
4 0
They could change but most likely not
skelet666 [1.2K]3 years ago
3 0
As scientist learn more they will develop or reconstruct their scientific ideas, most scientific ideas follows the scientific method, which includes coming up with predictions, revising old theories with the light of new theories or observations, and trying to falsify a theory or any scientific ideas, as time goes on.

Usually starting from scientific ideas, it goes on to coming up with hypothesis, then executing research, combining ideas from past published or unpublished research data and ideas, and eventually publish on a scientific journal, and other scientist will put in their two cents to the theory/scientific idea published.

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The velocity of sound in air saturated with water vapour at 30°C
Luba_88 [7]

Explanation:

The velocity of sound depends on the density of the medium.  So we need to find the density of air at each set of conditions.  The density of air is:

ρ = (Pd / (Rd T)) + (Pv / (Rv T))

where Pd and Pv are the partial pressures of dry air and water vapor,

Rd and Rv are the specific gas constants of dry air and water vapor,

and T is the absolute temperature.

At the first condition:

Pv = 31.7 mmHg = 4226.3 Pa

Pd = 650 mmHg - 31.7 mmHg = 618.3 mmHg = 82433 Pa

Rv = 461.52 J/kg/K

Rd = 287.00 J/kg/K

T = 30°C = 303.15°C

ρ = (82433 / 287.00 / 303.15) + (4226.3 / 461.52 / 303.15)

ρ = 0.94746 + 0.03021

ρ = 0.97767 kg/m³

At the second condition:

Pv = 0 Pa

Pd = 650 mmHg = 86660 Pa

Rv = 461.52 J/kg/K

Rd = 287.00 J/kg/K

T = 0°C = 273.15°C

ρ = (86660 / 287.00 / 273.15) + (0 / 461.52 / 273.15)

ρ = 1.1054 + 0

ρ = 1.1054 kg/m³

The square of the velocity of sound is proportional to the ratio between pressure and density:

v² = k P / ρ

Since the atmospheric pressure is constant, we can say it's proportional to just the density:

v² = k / ρ

Using the first condition to find the coefficient:

(340)² = k / 0.97767

k = 113018.652

Now finding the velocity of sound at the second condition:

v² = 113018.652 / 1.1054

v = 319.75

6 0
3 years ago
Which physical phenomenon is illustrated by the fact that the prism has different refractive indices for different colors
alexandr402 [8]

Answer:

The incoming white light is composed of light of different colors,

Since these different colors have different refractive indices they are refracted at different angles from one another.

The output light is then separated by color creating a color spectrum.

Since n is greater for shorter wavelengths  (violet colors) these wavelengths are refracted thru the larger angles.

5 0
3 years ago
What’s contact force ?
kodGreya [7K]

Explanation:

Contact force is any force that requires contact.  An object that exerts a force on another object by touching it is exerting a contact force.  Examples of contact force are friction and normal force.

Examples of a non-contact force are gravity and magnetism.

5 0
3 years ago
Read 2 more answers
Define Velocity with an example​
kolbaska11 [484]

Velocity stands for Displacement w.r.t time

\\ \bull\tt\longmapsto Velocity=\dfrac{Displacement}{Time}

Or

\\ \bull\tt\longmapsto v=\dfrac{ds}{dt}

  • It has units m/s.
8 0
2 years ago
Read 2 more answers
Horace has invented a unique pair of reading glasses that have two small light bulbs at the bottom wired in series, so that he c
ElenaW [278]

Answer:

The current drawn by Horace’s reading glasses is 0.8 A.

Explanation:  

Given that,

Resistance of each bulb, R = 2 ohms

Voltage of the system, V = 3.2 volts

These two bulbs are connected in series. The equivalent resistance will be 2 ohms +2 ohms = 4 ohms

Let I is the current drawn by Horace’s reading glasses. Using Ohm's law to find it such that :

V=IR\\\\I=\dfrac{V}{R}\\\\I=\dfrac{3.2}{4}\\\\I=0.8\ A

So, the current drawn by Horace’s reading glasses is 0.8 A.

3 0
3 years ago
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