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Vika [28.1K]
2 years ago
14

If the radius of an atom is 60 pm and the radius of the Earth is 6000 km, by how many orders of

Physics
1 answer:
kherson [118]2 years ago
6 0

Answer:

1 x 10¹⁷

               

Explanation:

Given data:

        Radius of the earth  = 6000km

        Radius of an atom  = 60pm

Now, how many orders is the radius of the earth larger than an atom

Solution:

To solve this problem, let us express both quantity as the same unit;

         1000m  = 1km

    6000km  = 6000 x 10³m   =  6 x 10⁶m

    60pm;

            1 x 10⁻¹²m  = 1pm

    60pm  = 60 x  1 x 10⁻¹²m  = 6 x 10⁻¹¹m

Now;

The order:   \frac{6 x 10^{6} }{6 x 10^{-11} }   = 1 x 10¹⁷

               

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One particle has a charge of 2.15 x 10^ -9 while another particle has a charge of 3.22 x 10^ -9 If the two particles are separat
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Answer:

B. 2.77 x 10^{-4} N

Explanation:

The required force can be calculated by:

F = \frac{Kq_{1}q_{2}  }{d^{2} }

Where F is the force between the particles, K is the coulomb's constant (9 x 10^{9} Nm^{2}/C^{2}), q_{1} is the charge on the first particle, q_{2} is the charge on the second particle and d^{2} is the distance between the particles.

So that:

F = \frac{9*10^{9}*2.15*10^{-9} *3.22*10^{-9}  }{(0.015)^{2} }

  = \frac{6.2307*10^{-8} }{(2.25*10^{-4} }

  = 2.7692 x 10^{-4}

 The force between the particles is 2.77 x 10^{-4} N.

3 0
2 years ago
Why must batteries be connected when the terminal voltage across each of them was measured
photoshop1234 [79]

Batteries are connected when the terminal voltage across each of them was measured because batteries have an internal resistance that is in series with the load.

<h3>What is a chemical reaction?</h3>

A chemical reaction is a process in which one or more substances, also known as reactants are converted to one or more different substances, known as products. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products

In batteries, the chemical energy is converted into electrical energy with help of a chemical reaction happening inside the battery.

Batteries and other power sources have an internal resistance that runs parallel to the load. The overall resistance of the path of the electron flow inside the source constitutes the internal resistance, which is not technically a resistor. Usually, internal resistance is extremely minimal.

Thus, considering the internal resistance of the batteries, the terminal voltage across each of them was measured.

Learn more about chemical reactions here

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4 0
1 year ago
Suppose 9.30 3 105 J of energy are transferred to 2.00 kg of ice at 0°C. (a) Calculate the energy required to melt all the ice i
Ratling [72]

Answer:

(a) 672000 J

(b) 258300 J

(c) 30.75 °C

Explanation:

<em>(a) Energy required to melt the ice = Latent heat of fusion of ice</em>

<em>Latent heat of fusion of ice (Q₁) = lm............................. Equation 1</em>

<em>Where l = specific latent heat of fusion of ice, m = mass of ice</em>

<em>Given: m = 2.00 kg</em>

<em>Constant : l = 336000 J/kg</em>

<em>Substituting these values into equation 1,</em>

Q₁ = 336000 × 2

Q₁ = 672000 J.

<em>Energy required to melt the ice = 672000 J</em>

<em>(b) The Energy remains to raise the temperature of the liquid water = Total Energy - Energy requires to melt  the ice.</em>

<em>Given: </em><em>Total Energy = 9.303 × 10⁵ J, = 930300 J</em>

<em>Energy remain to raise the temperature of the liquid water = </em>

<em>930300 - </em>672000

<em>Total Energy  = 258300 J</em>

Energy remain to raise the temperature of the liquid water = 258300 J.

<em>(c): Q = cmΔT ............. equation 2</em>

<em>Where c = specific heat capacity of water, m = mass of water, ΔT = change in temperature, Q = Energy required to change the temperature of liquid water  </em>

<em>Making ΔT the subject of formula in the equation above,</em>

<em>ΔT = Q/cm........................................... Equation 3</em>

<em>Given: m = 2.00 kg, Q = 258300 J</em>

<em>Constant: C = 4200 J/kg. K</em>

<em>Substituting these values into equation 3</em>

<em>ΔT = 258300/(4200×2)</em>

<em>ΔT = 258300/8400</em>

<em>ΔT = 30.75 K</em>

But ΔT = T₂ - T₁

Where T₁ initial temperature, T₂ = final Temperature

T₂ = T₁ + ΔT,

<em>Given: T₁ = 0 °C</em>

<em>Therefore,</em>

<em>T₂ = 30.75 + 0 = 30.75</em>

<em>T₂ = 30.75 °C</em>

Final temperature of water = 30.75 <em>°C</em>

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2 years ago
A sample of nitrogen gas exerts a pressure of 9.80 atm at 32 C. What would its temperature be (in C) when its pressure is increa
Harlamova29_29 [7]

Answer:

T₂ = 111.57 °C

Explanation:

Given that

Initial pressure P₁ = 9.8 atm

T₁ = 32°C  = 273 + 32 =305  K

The final pressure   P₂ = 11.2 atm

Lets take the final temperature = T₂

We know that ,the ideal gas equation  

If the volume  of the gas is constant ,then we can say that

\dfrac{P_2}{P_1}=\dfrac{T_2}{T_1}

T_2=\dfrac{P_2}{P_1}\times T_1

Now by putting the values in the above equation ,we get

T_2=\dfrac{11.2}{9.8}\times 305\ K

T_2=348.57\ K

T₂ = 384.57 - 273 °C

T₂ = 111.57 °C

3 0
3 years ago
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