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3 years ago

What does a Lewis structure diagram represent?

Physics

2 answers:

Free_Kalibri [48]3 years ago

7 0

Answer:

Explanation:

densk [106]3 years ago

5 0

Answer:

correct me if i'm wrong nut i thinks its a The atomic symbol of an element surrounded by valence electrons

Explanation:

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Suppose the magnitude of the proton charge differs from the magnitude of the electron charge by a mere 1 part in 109

Oksana_A [137]

Answer:

A) F = 1.09 10 5 N, b) Yes

Explanation:

Part A

For this exercise we need the number of free electrons in copper, as the valence of copper +1 there is a free electron for each atom. Let's use the concept of density to find the mass of copper in the sphere

ρ = m / V

.m = ρ V = ρ 4/3 π r³

The radius is half the diameter

r = 1.9 10⁻² / 2 = 0.95 10⁻² m

ρ = 8960 kg / m3

m = 8960 4/3 π (0.95 10⁻²)³

m = 3.2179 10⁻² kg

The molecular weight of copper is 63,546 g / mol which has 6,022 10²³ atoms

With this we can use a rule of proportions to enter the number of atom is this mass

#_atom = 6.022 10²³ 3.2179 10⁻² / 63.546 10⁻³

#_atom = 3,049 10²³

Therefore there is the same number of electrons, as they indicate that the charge of the protone and the electon differs by 1/10⁹ the total charge for each spherical is

q = e / 10⁹ #_atom

q = e / 10⁹ 3,049 1023

q = 3,049 10⁴ (-1.6 10⁻¹⁹)

q = -4,878 10-5 C

Electric force is

F = k q₁q₂ / r²

F = k q² / r²

Let's calculate

F = 8.99 10⁹ (4.878 10⁻⁵)²2 / (1.4 10⁻²)²

F = 1.09 10 5 N

This is a force of repulsion.

Part B

The magnitude of this force is in very easy to detect

4 0

4 years ago

How are stationary waves formed in closed pipes ? Explain the various modes of vibration and obtain relations for their frequenc

grigory [225]

Answer:

By the reflection and the superimposition of the incident sound waves.

Explanation:

7 0

2 years ago

What is the wavelength of a wave that has a speed of 350 meters/second and a frequency of 140 hertzDoes sound travel faster in a

babymother [125]

Answer:

Wavelength of wave is 2.5 meters

Explanation:

Given that,

Speed of a wave, v = 350 m/s

Frequency of the wave, f = 140 Hz

The formula to find the speed of sound is given by :

$v=f\lambda\\\\\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{350\ m/s}{140\ Hz}\\\\\lambda=2.5 m$

The speed of sound is more in higher temperature. At higher temperature, the molecules vibrate with more energy. As a result, sound travel faster in a warm room.

5 0

3 years ago

If a tube is placed vertically into a container of water, and the water level inside the tube is the same as the water level on

dybincka [34]

It's equal to d external atmospheric pressure

6 0

3 years ago

What is a stream’s discharge rate if it has a width of 10 meters, a depth of 2 meters, and a velocity of 2 meters per second?

julia-pushkina [17]

A stream’s discharge rate if it has a width of 10 meters, a depth of 2 meters, and a velocity of 2 meters per second will be 40 $m^{3}$ /sec .