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2 years ago

17. What is meant by the transition interval of an indicator?

Biology

1 answer:

Igoryamba2 years ago

4 0

The pH range over which an indicator alters the color defines the transition interval of an indicator.

<h3>What do you mean by Transition?</h3>

A Transition may be defined as a condition or process where one state of a compound changes into the other.

A Transition interval is a point where the color of indicators may change. For example, Phenolphthalein changes pink from colorless at a pH of 8-10. So, this point is called the transition interval.

Therefore, the pH range over which an indicator alters the color defines the transition interval of an indicator.

To learn more about Transition intervals, refer to the link:

brainly.com/question/13732801

#SPJ1

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2.86 A ball is dropped from rest from the top of a cliff that is 24 m high. From ground level, a second ball is thrown straight

Rashid [163]

Answer:

Distance Below the top = 6,02 m

Explanation:

To get the Final velocity of the first ball (that will be the intial velocity of the second) you need to solve the kinematic equation for Velocity:

(1) $V_{1f} =V_{1O} - gt$

As the ball is dropped from rest $V_{1O} = 0$ , so:

(2) $V_{1f} = - gt$

Note that the velocity is going to be negative as the ball is going down. To get the time it would take the ball to reach de base you can use the kinematic equation for position:

(3) $h_{1} = h_{1O} + V_{1O} *t - \frac{1}{2} gt^{2}$

We need the answer when h=0, and from the initial conditions $V_{1O} = 0, h_{1O} = 24m$ , you get:

(4) $24m = \frac{1}{2} gt_{1f}^{2}$

Solving for t, with $9,8\frac{m}{s^{2}}$ and :

(5) $t_{1f} = \sqrt{\frac{24m*2}{g} } = 2,21 s$

Replacing this time in (2), the final velocity is:

(6) $V_{1f} = -21,66 \frac{m}{s}$

So the initial velocity of ball 2 is equial to this but oppossite in direction so: $V_{2O}= -V_{1f} = 21,66 \frac{m}{s}$

The general position equation for ball 2 is (considering $h_{2O} = 0$ :

(7) $h_{2} = V_{2O} *t - \frac{1}{2} gt^{2}$

They cross paths when $h_{1}=h_{2}$ so:

(8) $h_{1O} - \frac{1}{2} gt^{2} = V_{2O} *t - \frac{1}{2} gt^{2}$

Rearranging:

(9) $t_{cross} =\frac{h_{1O}}{V_{2O} }$

Replacing values:

$t_{cross} = 1,108 s$

To get the absolute position replace $t_{cross}$ on equation (3) or (7):

$h_{cross} = 17,98 m$

To get it below the top of te cliff:

$h_{cross, from above} = 24 m - 17,98 m$

$h_{cross, from above} = 6,02 m$

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3 years ago

Most scientists think that life arose spontaneously from nonliving chemicals in the “primordial soup” of ancient Earth. The form

Agata [3.3K]

Answer:

Stanley Miller created an experiment where he sent an electrical charge through a flask of a chemical solution of methane, ammonia, hydrogen and water . This created organic compounds including amino acids .

The experiment supported the hypothesis that several organic compounds can be created in earth's early atmosphere , several organic amino acids can be created from inorganic raw material .

Explanation:

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horrorfan [7]

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