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3 years ago

_________ are exchanged or shared during the formation of a chemical bond.

2 answers:

6 0

<span>A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds; or through the sharing of electrons as in covalent bonds.

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Ainat [17]3 years ago

6 0

Chemical Bonds are made by sharing or exchanging valence shell electrons of two or more atoms

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Consider the hydrogen atom as described by the Bohr model. The nucleus of the hydrogen atom is a single proton. The electron rot

riadik2000 [5.3K]

To solve this problem we will apply the concept of centripetal acceleration. This type of acceleration is described as the product between the square of the angular velocity and the turning radius. Mathematically the expression can be expressed as

$a_c = \omega^2 r$

Here,

$\omega =$ Angular velocity

r = Radius

Our values are given as,

$\omega = 4.12*10^{16}rad/s$

$r = 5.29*10^{-11}$

Replacing,

$a_c = (4.12*10^{16})^2( 5.29*10^{-11})$

$a_c = 8.979*10^{22}m/s^2$

Therefore the electron's centripetal acceleration is $8.979*10^{22}m/s^2$

7 0

3 years ago

The stair stepper is a novel exercise machine that attempts to reproduce the work done against gravity by walking up stairs. Wit

nika2105 [10]

Answer:

The total work done by Brad each day is 176400 J

Explanation:

Hi there! The work done by a force (F) pointed in the same direction as the displacement (d) is calculated as follows:

W = F · d

The force applied is equal to the weight of Brad, that is calculated as follows:

Weight = m · g

Where:

m = mass of Brad

g = acceleration due to gravity (9.8 m/s²)

Then:

Weight = 60 kg · 9.8 m/s² = 588 N

Let´s find the vertical distance traveled by Brad each day:

He exercises 20 min per day. Each minute Brad does 60 steps. In total, Brad steps up (20 min · 60 steps/min) 1200 steps. If each step has a height of 0.25 m, the total distance traveled by Brad will be

(1200 steps · 0.25 m/step) 300 m.

Then, the total work done by Brad is

W = F · d

W = 588 N · 300 m

W = 176400 J

The total work done by Brad each day is 176400 J

6 0

2 years ago

What allows a metal to be pounded into a flat shape?

vovikov84 [41]

C im pretty sure?.........

3 0

2 years ago

For maximum radiation protection the suggested distance between array fan-beam scanner source and the operator is:

krok68 [10]

For maximum radiation protection the suggested distance between array fan-beam scanner source and the operator is 2m.

The Fan beam 5 position reference system (PRS) uses accurate time-of-flight laser technology to determine vessel position relative to custom reflectors.

A fan beam allows only the measurement of the azimuth angle. A fan beam, one with a narrow beam width in azimuth and a broad beam width in elevation, can be obtained by illuminating an asymmetrical section of the paraboloid.

The operators’ desk should be positioned at least 1m away from a pencil beam, and at least 2m from a fan-beam system. Some older models, that are not now common, require a distance of 3.5 m.

To learn more about scanner here

brainly.com/question/28174696

#SPJ4

4 0

1 year ago

A pipe with cross-sectional area 2.0 m^2 is joined to a second pipe with cross-sectional area 0.5 m^2. The pipes are both comple

IRISSAK [1]

Answer:

$v_2=8\ m/s$

Explanation:

It is given that,

Area of cross section of the pipe, $A_1=2\ m^2$

Area of cross section of the another pipe, $A_2=0.5\ m^2$

Speed of water in first pipe, $v_1=2\ m/s$

To find,

Speed of the water flowing in the second pipe.

Solve,

Let $v_2$ is the speed of water flowing in the second pipe. The relation between the area of cross section and the velocity is given by the continuity equation. It is given by :

$A_1v_1=A_2v_2$

$v_2=\dfrac{A_1v_1}{A_2}$

$v_2=\dfrac{2\times 2}{0.5}$

$v_2=8\ m/s$

Therefore, the water is flowing in the second pipe at the rate of 8 m/s.

3 0

3 years ago

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