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3 years ago

Why do the balls of the Newton’s cradle eventually stop?

2 answers:

8 0

gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity gravity

Studentka2010 [4]3 years ago

6 0

Gravity person above is correct

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A sample of milk kept at 25 °C is found to sour 40 times as rapidly as when it is kept at 4 °C. Estimate the activation energy f

irga5000 [103]

Answer:

120.575 kJ is the activation energy for the souring process.

Explanation:

The formula for an activation energy is given as:

$\log (\frac{K_2}{K_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]$

where,

$K_1$ = rate constant at $25^oC$ = $40k$

$K_2$ = rate constant at $4^oC$ = $k$

$Ea$ = activation energy for the reaction = ?

R = gas constant = 8.314 J/mole.K

$T_1$ = initial temperature = $25^oC=273+25=298 K$

$T_2$ = final temperature = $4^oC=273+4=277 K$

Now put all the given values in this formula, we get:l

$\log (\frac{k}{40k})=\frac{Ea}{2.303\times 8.314 J/mol K}[\frac{1}{298K}-\frac{1}{277 K}]$

$E_a=120,575.61J=120.575 kJ$

120.575 kJ is the activation energy for the souring process.

7 0

4 years ago

Perform the following operation and express the answer in scientific notation. 7.0x10^3 x 1.1x10^7

PSYCHO15rus [73]

Answer:

The answer is 7.7 ×10¹⁰

Explanation:

7.0 × 10³ × 1.1 × 10⁷

7.7 ×10¹⁰

Thus, The answer is 7.7 ×10¹⁰

<u>-TheUnknownScientist</u>

4 0

3 years ago

How many grams are in 1.3 x 1024 atoms of hydrogen?

olga2289 [7]

Answer: 4.32g

Explanation:

MM of H2 = 1 x 2 = 2g/mol

2g of H2 contains 6.02x10^23 atoms.

Therefore Xg of H2 will contain 1.3 x 1024 atoms i.e

Xg of H2 = (2 x 1.3 x 1024) / 6.02x10^23 = 4.32g

7 0

4 years ago

For a given mass the energy released is greatest for a reaction involving...

lukranit [14]

Nuclear fusion

Explanation:

For a given mass, the energy released is greatest for a reaction involving nuclear fusion.

Nuclear reactions generally release far much more energy compared to chemical energy because they involve the interaction between strong nuclear forces. There are two main types of nuclear reactions which are fusion and fission.

Nuclear fusion powers the sun and releases the greatest amount of energy.

In nuclear fusion, light atoms combines to form heavier ones.
The reaction degenerates into chain reaction in which huge amount of energy is released.
This reaction occurs in the core of sun and furnishes the solar system with radiant energy.

Learn more:

Transmutation brainly.com/question/3433940

#learnwithBrainly

5 0

4 years ago

During the titration of a weak acid and a strong base, you would expect the ph at the endpoint of titration to be ____.

riadik2000 [5.3K]

Answer is: b. more than 7.

The endpoint is the point at which the indicator changes colour in a colourimetric titration and that is point when titration must stop.

For example, basic salt sodium acetate CH₃COONa is formed from the reaction between weak acid (in this example acetic acid CH₃COOH) and strong base (in this example sodium acetate NaOH).

Balanced chemical reaction of acetic acid and sodium hydroxide:

CH₃COOH(aq) + NaOH(aq) → CH₃COONa(aq) + H₂O(l).

Neutralization is is reaction in which an acid (in this example vinegar or acetic acid CH₃COOH) and a base react quantitatively with each other.

8 0

3 years ago

Read 2 more answers