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2 years ago

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Help Please and answer correctly otherwise, I can report the answer and your account so make sure the answer is correct BUT PLEA

SE HELP ME I AM BEGGING. BRAINLY PLEASE PUT ME AT THE TOP OF THE PAGE PLEASE.

1 answer:

Alina [70]2 years ago

8 0

Answer:

G

Explanation:

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Explain the difference between current electricity and magnetism.

grigory [225]

Answer:

Electricity can be present in a static charge, while magnetism's presence is only felt when there are moving charges as a result of electricity. In simple words, electricity can exist without magnetism, but magnetism cannot exist without electricity.

HOPE THIS HELPS, HAVE A GREAT DAY!!~

Explanation:

3 0

2 years ago

If air is a fluid, why do we not include the buoyant force caused by the displacement of air by the objects in this experiment?

uysha [10]

Archimedes' principle allows us to find that the reasons why the thrust is not written when a body is in the air is:

The thrust of air is about 800 times less than the thrust of a fluid

In general the other forces (weight, tension) are much greater than thrust

Archimedes' principle establishes that the thrust is equal to the weight of the dislodged liquid (fluid)

B = ρ g V

Where B is the thrust, ρ and V the density and volume of the fluid, respectively, g the acceleration due to gravity.

In the attachment you have a diagram of a system in equilibrium in air and water, we can see that in the two cases for a system in equilibrium

B -W = 0

B = W

Let's find the value of the thrust in each case and compare

$B_{air} = \rho_{air} g V_{air}$

$B_{water} = \rho_{water} \ g V_{water}$

Used the density

$\rho_{air} = \ 1.26 \ kg/m^3 \\\rho_{water} = 997 kg/m^3$

$B_{air} = 1.26 \ g \ V_{air}\\B_{water} = 997 \ g \ V_{water}$

Suppose that the volume of the two bodies is the same

$B_{water} = 792 B_{air}$ r

We can see that the thrust in air or other gas is about 800 times less than the thrust in liquids. This is the reason that in many problems the thrust is not written when the body is in the air.

In conclusion, using Archimedes' principle, we find that the reason why the healed thrust is not written for a body is in the air is:

The thrust of air is about 800 times less than the thrust of a fluid

In general the other forces (weight, tension) are much greater than thrust

Learn more about Archimedes' principle here:

brainly.com/question/787619

5 0

2 years ago

Consider the ionic compound that is the combination of the Chromium (III) and hydroxide ions. How many chromium atoms would be p

kobusy [5.1K]

An ionic compound forms when a metal bonds with a non-metallic element. Metals usually form the cation and non-metal anions. Chromium has an oxidation number of +3 in the compound and charge on hydroxide ion is -1.

Cation here is $Cr^{3+}$

Anion is the hydroxide ion $OH^{-}$

So the formula of the compound will be: $Cr(OH)_{3}$ . The compound has one chromium atom and two hydroxide ions.

Therefore, there will be one Chromium atom per each chromium hydroxide compound.

6 0

3 years ago

A sample of gas is held at 100oc at a volume of 20 L.if the volume is increased to 40 L what is the new temperature of the gas i

ElenaW [278]

Answer:

470 °C

Explanation:

This looks like a case where we can use Charles’ Law:

$\dfrac{V_{1}}{T_{1}} =\dfrac{V_{2}}{T_{2}}$

Data:

V₁ = 20 L; T₁ = 100 °C

V₂ = 40 L; T₂ = ?

Calculations:

(a) Convert the temperature to kelvins

T₁ = (100 + 273.15) K = 373.15 K

(b) Calculate the new temperature

$\begin{array}{rcl}\dfrac{V_{1}}{T_{1}}& =&\dfrac{V_{2}}{T_{2}}\\\\ \dfrac{\text{20 L}}{\text{373.15 K}} &=&\dfrac{\text{40 L}}{T_{2}}\\\\{\text{15 000 K}} & = & 20T_{2}\\T_{2} & = &\dfrac{\text{15 000 K}}{20 }\\\\T_{2} & = & \textbf{750 K}\\\end{array}$

Note: The answer can have only two significant figures because that is all you gave for the volumes.

(c) Convert the temperature to Celsius

T₂ = (750 – 273.15) °C = 470 °C

3 0

2 years ago

DUE IN 30 MINUTES!!! (please keep it short if you can, if not its ok.) What is the molar mass of Pb(SO4)2? Explain how you calcu

kipiarov [429]

Answer:

399

Explanation:

Pb(SO4)2 contains 1 atom of Pb, 2 atoms of S and 8 atoms of O. So, atomic mass of Pb(SO4)2 is 207 + 64 + 128 = 399 u. Therefore, molar mass of Pb(SO4)2 is 399 g/mol.HOPE THIS helps. Good Luck

5 0

3 years ago

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