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Pie
3 years ago
6

Fast!! Help me!! Subject- Science​​

Physics
1 answer:
Tanzania [10]3 years ago
5 0

Answer:

Option c <em> </em>

Explanation:

soda fire extinguisher acts by cutting off supply of air and oxygen

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If you push any floating object down from equilibrium and release it, it bobs up and down. That looks like an oscillation, so le
GarryVolchara [31]

Answer:

  F_{y} = ( ρ_fluid g A) y

Explanation:

This exercise can be solved in two parts, the first finding the equilibrium force and the second finding the oscillating force

for the first part, let's write Newton's equilibrium equation

        B₀ - W = 0

        B₀ = W

        ρ_fluid g V_fluid = W

the volume of the fluid is the area of ​​the cube times the height it is submerged

      V_fluid = A y  

For the second part, the body introduces a quantity and below this equilibrium point, the equation is

        B - W = m a

        ρ_fluid g A (y₀ + y) - W = m a

        ρ_fluid g A y + (ρ_fluid g A y₀ -W) = m a

       ρ_fluid g A y + (B₀-W) = ma

the part in parentheses is zero since it is the force when it is in equilibrium

      ρ_fluid g A y = m a

      this equation the net force is

      F_{y} = ( ρ_fluid g A) y

we can see that this force varies linearly the distance and measured from the equilibrium position

8 0
3 years ago
Does gravity increase or decrease with greater distance?
PolarNik [594]
Gravitational force decreases with increasing distance. So it decreases!
6 0
3 years ago
Which of the following is a true statement?
Alchen [17]

Answer:

ideas can change as new discoveries are made.

though "we have yet to discover how to make a perfect organism" is also a valid choice? maybe refer to a textbook or something

5 0
3 years ago
The chemical reaction that causes iron to corrode in air is given by
sergiy2304 [10]

Answer :

(A) The value of \Delta G^o at 298 K is, 1521.9 kJ

(B) The value of \Delta G^o at 3652 K is, -301.59 kJ

Explanation :

Part A :

\Delta G^o=\Delta H^o-T\Delta S^o

where,

\Delta G^o = standard Gibbs free energy  = ?

\Delta H^o = standard enthalpy = 1684 kJ = 1684000 J

\Delta S^o = standard entropy = 543.7 J/K

T = temperature of reaction = 298K

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

\Delta G^o=(1684000J)-(298K\times 543.7J/K)

\Delta G^o=1521977.4J=1521.9kJ

Part B :

\Delta G^o=\Delta H^o-T\Delta S^o

where,

\Delta G^o = standard Gibbs free energy  = ?

\Delta H^o = standard enthalpy = 1684 kJ = 1684000 J

\Delta S^o = standard entropy = 543.7 J/K

T = temperature of reaction = 3652K

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

\Delta G^o=(1684000J)-(3652K\times 543.7J/K)

\Delta G^o=-301592.4J=-301.59kJ

5 0
3 years ago
Explain how atoms of elements form molecules, compounds and mixtures.
katrin2010 [14]

An element is composed of millions of atoms and a compound is composed of molecules. When an atom reacts with another atom, a molecule is formed.

For example, if sodium reacts with chloride, it forms sodium chloride (Common salt). Here, sodium and chloride are elements and sodium chloride is a molecule. In this way, millions of atoms of sodium reacts with chloride and forms common salt.

Again, when the common salt is mixed with other compounds such as water, it forms a mixture.

6 0
3 years ago
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