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Ilia_Sergeevich [38]
3 years ago
14

During a single-replacement reaction, a more-active metal will replace a less-active metal in a compound. Which single-replaceme

nt reaction will occur? Ni will replace Fe in a compound. Al will replace K in a compound. Mg will replace Ag in a compound. Ca will replace Li in a compound
Physics
1 answer:
son4ous [18]3 years ago
8 0

Answer:

Mg will replace Ag in a compound

Explanation:

A single replacement reaction is driven by the position of ions on the activity series.

As a rule of thumb, the position of metal ions on the activity series determines their reactivity.

Metal ions that are above another are more reactive and they will displace those that are lower.

Generally, activity increases as we go up the group.

Mg ions are higher than Ag ions on the series so, Mg will displace Ag from a solution.

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El radio de un tarro es de 0,07 m. Si la masa de un niño es de 50 kg y la de cada uno de sus zancos es de 1 kg, ¿cuál es la pres
inessss [21]

Answer:

La presión ejercida sobre el suelo mientras el niño está parado en un pie es 33127,874 pascales.

Explanation:

Después de una rápida investigación por internet, concluimos que este enunciado está incompleto. La versión completa se describe a continuación:

<em>En la imagen se observan los pies de tres niños que caminan en zancos hechos de tarros con arena en el interior. El radio del tarro es de 0,07 metros. Si la masa del niño es de 50 kilogramos y la de cada uno de sus zancos es de un kilogramo, ¿cuál es la presión que se ejerce sobre el suelo cuando el niño está parado en un pie? </em>(Nota: No se ha podido encontrar la citada imagen)

El enunciado hace referencia a aquel juego infantil de poner cada uno de los pies sobre un zanco hecho de una lata metálica. Ambos zancos están unidos mediante una cuerda accionada por las manos y brazos. En este caso, uno de los niños mantiene el equilibrio sobre uno de sus pies. La fuerza generadora de la presión ejercida sobre el suelo es el peso conjunto del niño y los zancos.

Asumiendo que la fuerza se distribuye uniformemente sobre la superficie inferior del zanco, el cual tiene forma de cilindro recto, la presión ejercida sobre el suelo (p), en pascales, queda descrita por la siguiente fórmula:

p = \frac{W}{A} (1)

p = \frac{(m_{N}+2\cdot m_{Z})\cdot g}{\pi\cdot r^{2} } (1b)

Donde:

m_{N} - Masa del niño, en kilogramos.

m_{Z} - Masa del zanco, en kilogramos.

g - Aceleración gravitacional, en metros por segundo al cuadrado.

r - Radio del tarro, en metros.

Si sabemos que m_{N} = 50\,kg, m_{Z} = 1\,kg, g = 9,807\,\frac{m}{s^{2}} and r = 0,07\,m, entonces la presión ejercida sobre el suelo mientras el niño está parado en un pie es:

p = \frac{(50\,kg + 2\,kg)\cdot \left(9,807\,\frac{m}{s^{2}} \right)}{\pi \cdot (0,07\,m)^{2}}

p = 33127,874\,Pa

La presión ejercida sobre el suelo mientras el niño está parado en un pie es 33127,874 pascales.

3 0
3 years ago
An electron is pushed into an electric field where it acquires a 1-v electric potential. if two electrons are pushed the same di
liq [111]

Given here that through the same region 2 electrons are pushed by same distance

As we know that electric potential can be relate with electric field by following relation

\delta V = E . d

Since the two electrons are pushed through same electric field by same distance

So the product of E and d will be same

So the electric potential will be same as initial

so V = 1 volt for two electrons

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4 years ago
2. Sally put her mug of coffee on the table. The mug has a mass of 1 kg. if the pressure
egoroff_w [7]

We have,

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We know that,

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As, we already have the value of pressure, let's calculate that of force now;

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  • F = 1 × 9.8 { Acceleration due to gravity, let's round off it to 10}
  • F = 10 N

Just put all the values in the formula now;

  • P = F/A
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As, it is already mention that we need to find the radius of the mug, it is obviously a circular base.

We know that,

  • Surface area = Circumference

So, let's solve it;

  • Circumference = 2πr
  • 110 = 2 × 22/7 × r
  • 110 × 7/2 × 22 = r
  • 5 × 7 = r
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7 0
3 years ago
What are the types of nuclear radiation ? (Particles let off by nuclear<br> materials.) *
Neko [114]

Answer:

Because nuclear decay releases ionizing radiation (alpha, beta, and gamma radiation) we call such compounds radioactive.

Explanation:

6 0
3 years ago
A coin is dropped from a height of 188 meters. Neglecting air resistance, how much time (in seconds) was the coin in the air?
Marina CMI [18]

Answer:

t=6.19s

Explanation:

With a initial velocity is zero, kinematics equation is:

y=1/2*g*t^2

t=\sqrt{2y/g}=\sqrt{2*188/9.81}=6.19s

8 0
3 years ago
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