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4 years ago

What are your thoughts on Galileo's idea about motion? i need the answer pls

Chemistry

1 answer:

dalvyx [7]4 years ago

4 0

Answer:

Galileo believed that a projectile is a combination of uniform motion in the horizontal direction and uniformly accelerated motion in the vertical direction. If it is not impeded, it will continue to move even without an applied force

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Yanka [14]

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3 years ago

The pre-exponential constant and activation energy for the diffusion of iron in cobalt are 1.7 x 10-5 m2/s and 273,300 J/mol, re

Kitty [74]

Answer: The temperature of the system will be 1622 K

Explanation:

The equation relating the pre-exponential factor and activation energy follows:

$\log D=\log D_o-\frac{E_a}{2.303RT}$

where,

D = diffusion coefficient = $2.7\times 10^{-14}m^2/s$

$D_o$ = pre-exponential constant = $1.7\times 10^{-5}m^2/s$

$E_a$ = activation energy of iron in cobalt = 273,300 J/mol

R = Gas constant = 8.314 J/mol.K

T = temperature = ?

Putting values in above equation, we get:

$\log (2.7\times 10^{-14})=\log (1.7\times 10^{-5})-\frac{273,300}{2.303\times 8.314\times T}\\\\T=1622K$

Hence, the temperature of the system will be 1622 K

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3 years ago

Select the reagent that will separate the pairs of ions listed.

daser333 [38]

1 - a, 2-b, 3-d, 4 - e

Explanation:

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Silver and aluminum ions can be separated using the acid, 6M HCl.

$C u^{2+} \text { and } C a^{2+}$ - Separated by H₂S

Copper and Calcium ions can be separated by the reagent hydrogen sulfide, H₂S.

$M g^{2+} \text { and } K^{+}$ - Separated by (NH₄)₂HPO₄ in NH₃

Magnesium and Potassium ions can be separated by the reagent Ammonium hydrogen phosphate in ammonia.

$N i^{2+} \text { and } C o^{2+}$ - cannot be separated

Nickel and Cobalt ion cannot be separated by the reagents given at all.

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3 years ago

If I have 20g of Sodium, how many moles of Sodium Oxide (Na2O) can be made?

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=0.32 mil

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4 years ago

Which units of pressure are needed if you are going to use 0.0821 as your ideal

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Answer:

D. Atmospheres

Explanation:

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3 years ago

What are your thoughts on Galileo's idea about motion? i need the answer pls​

What are your thoughts on Galileo's idea about motion? i need the answer pls