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Nesterboy [21]
4 years ago
14

Student groups are given an unknown liquid to test using the four indicators. One group conducts the tests and records these res

ults. Color Changes - pH Indicators Indicator Used Color Produced Methyl violet Bluish Bromophenol blue Yellow Phenolphthalein Colorless Thymolphthalein Colorless Using the table of indicator values, determine the approximate pH of the unknown solution. A) 1.6 B) >3.0 C) between 0 and 1.6 D) between 1.6 and 3.0
Physics
2 answers:
ivolga24 [154]4 years ago
8 0

Answer:

The answer is (d) I promise i'm not lying I just checked on my test

.

Explanation:

galben [10]4 years ago
3 0

Answer:

d

Explanation:

between 1.6 and 3.0 The methyl violet test falls in the transition range while the bromophenol test, with a yellow color, would fall below that transition range. The last two indicators are colorless; the unknown must be an acid and you can narrow the pH range to 1.6 and 3.0.

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A proton and a deuteron are moving with equal velocities perpendicular to a uniform magnetic field. A deuteron has the same char
Yuri [45]

Answer:

The ratio of the acceleration of the proton to that of the deuteron is 2

Explanation:

For a moving charge in magnetic field, the magnetic force is balanced by force due to its motion. So,

qvB=ma

Acceleration of proton,

a_p=\dfrac{qvB}{m_p}  .........(1)

Acceleration of deuteron,

a_d=\dfrac{qvB}{m_d}   ..........(2)

Since, a deuteron has the same charge as the proton but has twice its mass.

Dividing equation (1) and (2) we get :

\dfrac{a_p}{a_d}=\dfrac{m_d}{m_p}

m_d=2m_p

\dfrac{a_p}{a_d}=\dfrac{2m_p}{m_p}\\\\\dfrac{a_p}{a_d}=2

So, the ratio of the acceleration of the proton to that of the deuteron is 2. Hence, the correct option is (a).

4 0
3 years ago
At the second maxima on either side of the central bright spot in a double-slit experiment, light from
Alex

Answer:

Option 3 is the correct option to the following question.

Explanation:

Double slit experiment:

The double-slit experiment in modern physics reveals that light and matter can exhibit characteristics of both classically described waves and particles; it also shows the inherently probabilistic existence of quantum mechanical phenomena.  

When two wavelength meets ,if the resultant amplitude is maximum then this is known as constructive interference and the resultant amplitude is maximum then this is known as destructive interference.

Therefore the answer is "3".

5 0
4 years ago
Help pls, see picture. Will mark Brainliest
Leno4ka [110]

Answer:

B

Explanation:

the graph shows the line going up (accelerating) and it isn't curving like d so it doesn't stop accelerating

Hope this helps :)

4 0
3 years ago
Changes in behavior of managers, coworkers, and subordinates can be a warning sign before a layoff. True or false
Yakvenalex [24]

Answer:

The correct answer is - true.

Explanation:

Changes in the higher authorities or managers or coworkers can be a warning sign before a layoff, however, a company or organization needs to give an official notice before a particular time period before the layoff.

The layoff is a temporary suspension or permanent termination from the employment of an employee due to reasons related to business such as reducing manpower or staff and less work in the organization. These reasons can lead to a change in the behavior of the managers, coworkers, and subordinates.

3 0
3 years ago
Under what circumstances will light display total internal reflection?
kumpel [21]
When light is passing from a denser medium to a lighter medium ( for example: from water to air) 
<span> When the angle of refraction is greater than the critical angle( angle of incidence when the angle of refraction is perpendicular to the normal) of the denser medium.</span>
3 0
4 years ago
Read 2 more answers
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