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4 years ago

At a job interview, the most effective way to prove your proficiency to a prospective employer is to show that you have

1 answer:

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The most effective way to showcase your proficiency in a job interview is to show certificates. For example, in this case, option D. certification as an electronics technician. Option A's online research experience is menial as well as using own test equipment as this renders hassle and futile. Membership cannot guarantee job proficiency, too. Answer is D.

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A golf pro has 2100 J of kinetic energy and swings his driver which weighs .75 kg. What is the speed of his swing?

jeka57 [31]

Answer : The correct answer is 74.83 m/s .

The kinetic energy is energy possessed by any mass which is moving or have some speed . It is product of mass and velocity . It is expressed as :

$KE = \frac{1}{2} * m* v^2$

Where KE = kinetic energy in J or $kg\frac{m^2}{s^2}$ m = mass in Kg v = speed in m/s²

Unit of KE is Joules (J) .

Givne : KE = 2100 J mass = 0.75 kg v = ?

Plugging value in KE formula =>

$2100 J = \frac{1}{2} * 0.75 Kg * v^2$

$2100 J = 0.375 Kg * v^2$

Dividing both side by 0.375 kg =>

$\frac{2100 J}{0.375 Kg} = \frac{0.375 Kg}{0.375 Kg } * v^2$

$v^2 = 5600 \frac{m^2}{s^2}$

$v= 74.83 \frac{m}{s}$

8 0

4 years ago

Read 2 more answers

HELP!!!!

Elan Coil [88]

Answer: 908 g Fe2O3

Explanation:

5 0

4 years ago

Read 2 more answers

An element has 2 neutrons, 2 electrons and 2 protons. Which element does this describe? Is it a neutral atom, isotope, or an ion

Y_Kistochka [10]

Considering the definition of neutral atom, mass number and net charge, the element is a neutral atom, with a net charge equal to zero and a mass number of 4.

<h3>Neutral atom and ion</h3>

All atoms are made up of subatomic particles: protons and neutrons, which are part of their nucleus, and electrons, which revolve around them. Protons are positively charged, neutrons are neutrally charged, and electrons are negatively charged.

A neutral atom is one that has no electrical charge because it has the same number of protons and electrons.

In contrast, ions are atoms or groups of atoms that have an electrical charge and are formed by the gain or loss of electrons from the atom.

<h3>Mass number</h3>

The mass number tells us the total number of particles in the nucleus. That is, the mass number is the sum of the number of protons and the number of neutrons in the atomic nucleus:

Mass number = (number of protons) + (number of neutrons)

It is represented by the letter A.

<h3>Net charge</h3>

The net charge corresponds to the algebraic sum of all the charges that a atom possesses.

In this case, an element has:

2 neutrons.
2 electrons.
2 protons.

Then, the net charge is calculated as:

net charge= 2× 0 [charge of neutron] + 2× (+1) [charge of proton] + 2× (-1) [charge of electron]

<u><em>net charge= 0</em></u>

This element has no electrical charge, or net charge is zero. Then, the element is a neutral atom.

On the other hand, the mass number is the sum of the number of protons and the number of neutrons. So, in this case:

mass number= 2 protons + 2 neutrons

<u><em>mass number= 4</em></u>

Finally, the element is a neutral atom, with a net charge equal to zero and a mass number of 4.

Learn more about

neutral atom:

brainly.com/question/24652228

brainly.com/question/18242008

brainly.com/question/18330612

mass number:

brainly.com/question/1758023

brainly.com/question/5527493

net charge:

brainly.com/question/24752359

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1 year ago

CICLOS BIOGEOQUIMICOS: lugares en que encontramos el elemento del ciclo separando en bioticos y abioticos

scoundrel [369]

Answer:

Los ciclos biogeoquímicos son definidos como la circulación de los elementos químicos entre organismos biológicos (es decir, el factor biótico del ciclo), y componentes geológicos inorgánicos del sistema (factores abióticos). En el ciclo del agua, por ejemplo, este elemento se encuentra esparcido en los ríos y arroyos, como así también en la atmósfera, desde donde fluye como lluvia hasta el suelo y puede ser ingerida por organismos vivos terrestres y es utilizada para llevar a cabo diversas funciones celulares.

Explanation:

Los ciclos biogeoquímicos establecen un vinculo entre los factores bióticos y abióticos del ecosistema, de modo que la energía puede fluir libremente a través de ambas partes del sistema. Los seres vivos necesitan diferentes elementos químicos para sobrevivir, los cuales forma parte de los ciclos biogeoquímicos. En los ciclos biogeoquímicos los elementos se conocen como 'nutrientes' (micro y macronutrientes). Estos elementos se encuentran esparcidos tanto en la corteza de la tierra como en la biósfera. Los nutrientes son indispensables porque de ellos depende de que la energía fluya entre el componente inorgánico y orgánico del ciclo. Por otra parte, los nutrientes también circulan dentro del ciclo entre componentes bióticos de la cadena trófica, con lo cual no sólo los nutrientes sino también la energía fluye entre organismos, desde aquellos más basales en el sistema tales como plantas (ecosistemas terrestres) o algas (marinos), hasta los niveles superiores representados por especies animales hervívoras y carnívoras de tales ecosistemas.

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3 years ago

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3 years ago