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3 years ago

What does the zeroth law of thermodynamics allow us to define?

Physics

2 answers:

Morgarella [4.7K]3 years ago

8 0

<u>Explanation:</u>

Zeroth law of thermodynamics is known as the law of thermal equilibrium.

This law states that the two systems that are in thermal equilibrium with the third system then the two systems will be in equilibrium with each other.

According to this law, if two systems A and B individually are in thermal equilibrium with third system C, then systems A and B will also be in thermal equilibrium with each other.

Thermal equilibrium is a condition where two systems in equilibrium exchange no heat energy. There is no change in temperature.

REY [17]3 years ago

3 0

The zeroth law of thermodynamics states that if two thermodynamic systems each are in thermal equilibrium with a third, then they are in thermal equilibrium with each other.

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The color that is refracted the most has the___ wavelength

irinina [24]

The color that is refracted the most has the SHORTER wavelength. The shorter the wavelength,the more it gets refracted.

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3 years ago

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Playing near a road construction site, a child falls over a barrier and down onto a dirt slope that is angled downward at 33° to

Debora [2.8K]

Answer:

$\mu_{k} \approx 0.719$

Explanation:

The equations of equilibrium for the child are: (x' in the direction parallel to slope, y' in the direction perpendicular to slope)

$\Sigma F_{x'} = m\cdot g \cdot \sin \theta - \mu_{k}\cdot N = m\cdot a\\\Sigma F_{y'} = N - m\cdot g\cdot \cos \theta = 0$

After some algebraic manipulation, an expression for the coefficient of kinetic friction is obtained:

$m\cdot g\cdot \sin \theta - \mu_{k}\cdot m \cdot g \cos \theta = m \cdot a$

$g \cdot (\sin \theta - \mu_{k}\cdot \cos \theta) = a$

$\mu_{k}\cdot \cos \theta = \sin \theta - \frac{a}{g}$

$\mu_{k} = \frac{1}{\cos \theta}\cdot (\sin \theta - \frac{a}{g} )$

$\mu_{k} = \frac{1}{\cos 33^{\textdegree}}\cdot \left(\sin 33^{\textdegree}-\frac{(-0.57\,\frac{m}{s^{2}}) }{9.807\,\frac{m}{s^{2}} } \right)$

$\mu_{k} \approx 0.719$

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4 years ago

La) What is meant by the term Basic Quantities.

castortr0y [4]

Answer:

A basic quantity is basically the physical quantity that can not be defined in terms of other quantities.

Explanation:

A basic quantity is basically the physical quantity that can not be defined in terms of other quantities.

Some of the names of the basic quantities include:

Mass, denoted by the symbol 'm', with S.I. unit 'kg'
Length, denoted by symbol 'l', with S.I. unit 'm'
Time, denoted by symbol 't', with S.I. unit 's'
Current, denoted by 'I', with S.I. unit 's' 'A'
Temperature, denoted by 'T', with S.I. unit 'K'
Amount of substance, denoted by 'n', with S.I. unit 'mol'
Luminous Intensity, denoted by 'Iv', with S.I. unit 'cd'

A basic quantity is chosen arbitrarily.

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3 years ago

Alice kicks a soccer ball with a mass of 2 kg. The ball leaves the ground moving 30 meters per second. What is the kinetic energ

sleet_krkn [62]

By using the formula:

• K.E = ½mv²

mass, m = 2 kg
Velocity, v = 30 m/s

→ K.E = ½ × 2 × (30)² J

→ K.E = (30)² J

→ K.E = 900 J (Answer)

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2 years ago

Two charged particles are placed 2.0 meters apart. the first charge is +2.0 e-6 c and the second charge is +4.0 e-6

Yakvenalex [24]

The Coulomb force between two charges is defined as: Fc=(k*Q₁*Q₂)/r² where k=9*10^9 N m² C⁻², Q₁ and Q₂ are charges and r is the distance between those charges.
In our case:

Q₁=2*10^-6 C
Q₂=4*10^-6 C
r=2 m

Now we simply plug in the numbers into the equation:

Fc={(9*10^9)*(2*10^-6)*(4*10^-6)}/2^2=0.018 N

The Coulombs force between the two positive charges is Fc=0.018 N and it is a repulsive force because both charges are positive.

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3 years ago