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daser333 [38]
3 years ago
11

He graph shows all of the stable isotopes of elements according to the numbers of protons and neutrons in their nuclei.

Physics
1 answer:
pychu [463]3 years ago
9 0

Answer:

A and B i think

Explanation:

You might be interested in
Cuanto cambia la entropía de 0.50 kg de vapor de mercurio [Lv: 2.7 x 10⁵ j/kg ] al calentarse en su punto de ebullición de 357°
lord [1]

Answer:

La entropía del vapor de mercurio cambia en 214.235 joules por Kelvin.

Explanation:

Por definición de entropía (S), medida en joules por Kelvin, tenemos la siguiente expresión:

dS = \frac{\delta Q}{T} (1)

Donde:

Q - Ganancia de calor, en joules.

T - Temperatura del sistema, en Kelvin.

Ampliamos (1) por la definición de calor latente:

dS = \frac{L_{v}}{T}\cdot dm (1b)

Donde:

m - Masa del sistema, en kilogramos.

L_{v} - Calor latente de vaporización, en joules

Puesto que no existe cambio en la temperatura durante el proceso de vaporización, transformamos la expresión diferencial en expresión de diferencia, es decir:

\Delta S = \frac{\Delta m \cdot L_{v}}{T}

Como vemos, el cambio de la entropía asociada al cambio de fase del mercurio es directamente proporcional a la masa del sistema. Si tenemos que m = 0.50\,kg,L_{v} = 2.7\times 10^{5}\,\frac{J}{kg} and T = 630.15\,K, entonces el cambio de entropía es:

\Delta S = \frac{(0.50\,kg)\cdot \left(2.7\times 10^{5}\,\frac{J}{kg} \right)}{630.15\,K}

\Delta S = 214.235 \,\frac{J}{K}

La entropía del vapor de mercurio cambia en 214.235 joules por Kelvin.

3 0
3 years ago
The coordinates of a bird flying in the xy plane are given by x(t)=αt and y(t)=3.0m−βt2, where α=2.4m/s and β=1.2m/s2
mr_godi [17]
We've seen this introduction to a question posted several times before here on Brainly, but it always stops right there. What is the question ? ? ?
8 0
3 years ago
What is the amount of electric current passing through the heating oil of a hot plate if 25 C of charge passes through it in 7 s
coldgirl [10]

Answer:

Current, I = 3.57A

Explanation:

A current of I amperes means that I Coulombs of charge flows through the conductor (heating coil) per second.

Therefore, in time t, the total charge (Q) passing through any point in which the current (C) flows will be given by the equation;

Q = It

Where; Q is the charge in coulombs; I is the current in amperes; t is the time in seconds.

From the question, we were given the following parameters;

Q = 25C, t= 7secs and I =?

From the equation, Q = It

We make current, I the subject of formula;

Thus, I = Q/t

Substituting into the equation;

I = 25/7

I = 3.57Amp.

3 0
3 years ago
What is the value of the boltzmann constant of 1.7 moles of gas at 290 K that has an average kinetic energy of 1.4 MJ? A. 7x10^-
fredd [130]

Answer:

The value of  of the Boltzmann constant is 3.14\times 10^{-23} J/K.

Explanation:

Generally the formula for average kinetic energy of a molecule :

K.E=\frac{3}{2}kT

where,

k = Boltzmann’s constant

T = temperature = 290 K

Given:

Number of molecules in 1.7 moles:

1.7\times 6.022\times 10^{23} molecules=1.0237\times 10^{24} molecules

Average kinetic energy of 1.7 moles = 1.4 MJ =1.4\times 10^6 J

Average kinetic energy of 1 molecule = \frac{1.4\times 10^6 J}{1.023\times 10^{24}} =1.3675\times 10^{-18} J

1.3675\times 10^{-18} J=\frac{3}{2}\times k\times (290K)

k=3.14\times 10^{-23} J/K

8 0
3 years ago
If you needed information about a scientificconcept, whom would you ask? Check all thatapply.my teachermy parentsa university pr
allochka39001 [22]
A librarian... it might also be a scientist
4 0
3 years ago
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