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Elodia [21]
3 years ago
13

In this experiment, you will use a natural indicator to indirectly determine the H+ concentration of some common household solut

ions to determine a physical characteristic of the solution. In the space below, write a scientific question that you will answer by doing this experiment.
Physics
2 answers:
Vlad1618 [11]3 years ago
7 0
Some of the scientific questions that may be answered through the experiment are:

(1) What are the physical changes that may occur in the solution or the indicator when added with acidic/basic solution?

(2) How much of the indicator is needed in order to bring about a significant physical change in the solution to identify its H+ concentration?
Xelga [282]3 years ago
7 0

Answer:

“How is pH used to determine if a solution is acidic or basic?

Explanation:

Sample response i just did it

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ANEK [815]

Answer: 90000 kgm/s

Explanation:

Given that,

Momentum of car = ?

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Velocity of car = 6 m/s

Recall that momentum is the product of mass of the moving object by its velocity

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Momentum = 15000kg x 6m/s

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MAXImum [283]

Answer:

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3 years ago
A photon ionizes a hydrogen atom from the ground state. The liberated electron 11. recombines with a proton into the first excit
anygoal [31]

Answer:

a) 23.2 e V

b) energy of the original photon is 36.8 eV

Explanation:

given,

energy at ground level = -13.6 e V

energy at first exited state = - 3.4 e V

A photon of energy ionized from ground state and electron of energy K is released.

h ν₁ - 13.6 = K

K combine with photon in first exited state giving out photon of energy

h\nu_2 =\dfrac{hc}{\lambda}=\dfrac{12400}{466}

            = 26.6 e V

h c = 6.626 ×  10⁻³⁴ ×  3  × 10⁸  = 12400 e V A°

K + ( 3.4 ) = 26.6 e V

a) energy of free electron

K = 26.6 - 3.4 = 23.2 e V

b) energy of the original photon

h ν₁ - 13.6 = K

h ν₁  = 23.2 + 13.6

       = 36.8 e V

energy of the original photon is 36.8 eV

3 0
4 years ago
An iron nail is driven into a block of ice by a single blow of a hammer. The hammerhead has a mass of 0.5 kg and an initial spee
larisa [96]

Answer:

The ice melts mass is:

m_g=7.6x10^{-3} g

Explanation:

Kinetic Energy  

K_E = 1/2*m*v^2

K_E = 1/2*0.5kg*(3.2m/s)^2

K_E=2.56 kg*m^2/s^2

Heat gained by ice= mass(g) x 80 cal

( 1 cal = 4.184 *10^7er or g cm^2/ sec^2)

Assuming no loss in heat,  in the motion so both continue with temperature 0~C

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m_g=7.6x10^{-3} g

5 0
3 years ago
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