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2 years ago

What is potential energy

Physics

2 answers:

valkas [14]2 years ago

6 0

Answer:

Potential energy is energy that is stored – or conserved - in an object or substance. This stored energy is based on the position, arrangement or state of the object or substance. You can think of it as energy that has the 'potential' to do work.

Norma-Jean [14]2 years ago

3 0

Answer:

Potential energy is the energy possessed by a body by virtue of its position relative to others.

Explanation:

potential energy can also be defined as the energy that is stored in an object due to it's position relative to some zero position

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A cylinder with a movable piston contains a sample of ideal gas. A temperature probe and a pressure probe are inserted into the

PtichkaEL [24]

Answer:

i. The values for the graph are;

Volume Pressure

1 1

1/4 1

1 1/4

1 1

The graph is attached

ii. Energy is added to the system.

Explanation:

i) Here we note that Charles law states that the volume of a given mass of gas is directly proportional to its temperature at constant pressure.

Therefore;

T₁/V₁ = T₂/V₂

Where V₂ = V₁/4, we have;

T₁/V₁ = T₂/(V₁/4) = 4×T₂/V₁

T₁ = 4×T₂

Therefore, T₂ = T₁ /4

In process BC, whereby the gas expands isothermally to original volume, we have; according to Boyle's law

P₁·V₁ = P₂·V₂

V₁ = 4·V₂

∴ P₁·4·V₂ = P₂·V₂

4·P₁ = P₂

Process CA, gas returns to initial state with T₂ = T₁ /4

Therefore, we have from Pₐ·Vₐ/Tₐ = P₁·V₁/T₁

Where the volume remain constant, we have Gay Lussac's Law which states that the pressure of a given mass of gas is directly proportional to its temperature, therefore

P₁/T₁ = P₂/T₂

Hence; whereby the temperature changes from T₂ to T₁ and T₂ = T₁ /4, we have P₁ = 4·P₂

Therefore, the pressure increases by a factor of 4 × 4 = 16.

Please find the graph attached

ii) Given that the gas expands to its original volume V₁, such that V₁ = 4·V₂, also work done, W is given as follows;

$W = nRTln\frac{v_f}{v_i} = nRTln\frac{v_1}{v_2} \ \because v_f =v_1 \ and \ v_i = v_2 \ also \ v_1 = 4\cdot v_2$

Therefore;

$W = nRTln\frac{4\cdot v_2}{v_2} \ \therefore W = nRTln(4)$

Hence, as n, R, and T are all positive values, W is positive, energy is added to the system.

8 0

2 years ago

The rate at which work is done is called

Vilka [71]

Answer:

The rate at which work is done is power

4 0

2 years ago

The magnitude of the electrostatic force between two identical ions that are separated by a distance of 5.0A is 3.7×10^-9N.a) wh

jeyben [28]

Explanation:

Given that,

Electrostatic force, $F=3.7\times 10^{-9}\ N$

Distance, $r=5\ A=5\times 10^{-10}\ m$

(a) $F=\dfrac{kq^2}{r^2}$ , q is the charge on the ion

$q=\sqrt{\dfrac{Fr^2}{k}}$

$q=\sqrt{\dfrac{3.7\times 10^{-9}\times (5\times 10^{-10})^2}{9\times 10^9}}$

$q=3.2\times 10^{-19}\ C$

(b) Let n is the number of electrons are missing from each ion. It can be calculated as :

$n=\dfrac{q}{e}$

$n=\dfrac{3.2\times 10^{-19}}{1.6\times 10^{-19}}$

n = 2

Hence, this is the required solution.

8 0

3 years ago

Thermodynamics

Akimi4 [234]

Answer:

E = 3.8 kJ

Explanation:

Given that,

The mass of the object, m = 10 g = 0.01 kg

The heat of fusion of aluminum is 380 kJ/kg

We need to find the energy required to melt the mass of the aluminium. It can be calculated as follows:

E = mL

So,

E = 0.01 × 380

E = 3.8 kJ

So, the energy required to melt the mass is equal 3.8 kJ.

7 0

2 years ago

Name a situation when potential energy is useful

adell [148]

Gravitational energy is a form of potential energy because it is dependent on the mass of an object and needs to be calculated for the specific object.

3 0

2 years ago