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4 years ago

Atomic nuclei of almost all elements consist of

Physics

1 answer:

wolverine [178]4 years ago

4 0

<h2>Answer: protons and neutrons. </h2>

The atomic nuclei of almost all elements consist of protons and neutrons.

The nucleus of an atom has very small dimensions. However, it <u>occupies its central part and concentrates more than 99% of its total mass. </u>

It is in the nucleus that the protons (positive charge) and neutrons (neutral charge) are found.

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How is a drill used to hang a picture similar to a catalyst in a chemical reaction?

IgorC [24]

You’re answer is 1.

Once you drill something and put a hole in it that whole cannot be undone making it a chemical reaction.

3 0

4 years ago

Read 2 more answers

1. Una carga eléctrica de 5*10-6 C genera un campo eléctrico a su alrededor. Calcula la intensidad de este campo a una distancia

Jlenok [28]

Answer:

La intensidad del campo eléctrico es 70312.5 $\frac{N}{C}$ .

Explanation:

La perturbación que crea en torno a ella una carga eléctrica se representa mediante un vector denominado campo eléctrico.

Se dice que un campo eléctrico es uniforme en una región del espacio cuando la intensidad de dicho campo eléctrico es el mismo en todos los puntos de dicha región.

El campo eléctrico E creado por la carga puntual q en un punto cualquiera P se define como:

$E=k*\frac{q}{r^{2} }$

donde q es la carga creadora del campo, k es la constante electrostática y r es la distancia desde la carga fuente al punto P.

En este caso, los datos son:

k= 9*10⁹ $\frac{N*m^{2} }{C^{2} }$
q= 5*10⁻⁶ C
r= 0.8 m

Reemplazando:

$E=9*10^{9}\frac{N*m^{2} }{C^{2} } *\frac{5*10^{-6} C}{(0.8 m)^{2} }$

Resolviendo:

E= 70312.5 $\frac{N}{C}$

<em><u>La intensidad del campo eléctrico es 70312.5 </u></em> $\frac{N}{C}$ <em><u>.</u></em>

5 0

3 years ago

Two vehicles, a car and a truck, leave an intersection at the same time. The car heads east at an average speed of 20 miles pe

leva [86]

Answer:

$d = 10\times t\sqrt{29}miles$

Explanation:

Given:

't' hour be the time taken for travel by both the vehicles and 'd' be the distance between then

then

Distance traveled by the car = 20 × t miles

and

Distance traveled by the truck = 50 × t miles

now, using the Pythagoras theorem

$d = \sqrt{(20t)^2+(50t)^2}$

$d = \sqrt{400t^2+2500t^2}$

$d = \sqrt{2900t^2}$

$d = 10\times t\sqrt{29}$

thus, the equation relating the distance 'd' with the time 't' comes as

$d = 10\times t\sqrt{29}miles$

7 0

4 years ago

A 3.20 g sample of a salt dissolves in 9.10 g of water to give a saturated solution at 25°C. a. What is the solubility (in g sal

muminat

Answer:

The solubility of the salt is 35.16 (g/100 g of water).

It would take 71.09 grams of water to dissolve 25 grams of salt.

The percentage of salt that dissolves is 52.7 %

Explanation:

We know that 3.20 grams of salt in 9.10 grams of water gives us a saturated solution at 25°C. To find how many grams of salt will gives us a saturated solution in 100 grams of water at the same temperature, we can use the rule of three.

$\frac{3.20 \g \ salt}{9.10 \ g \ water} = \frac{x \ g \ salt}{100 \ g \ water}$