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3 years ago

21

Physics

2 answers:

maks197457 [2]3 years ago

8 0

An electrons transferred and compound forms

ryzh [129]3 years ago

6 0

Answer:

Before I answer I want to say this Calibri is the superior font and green is the only highlight color.

The correct answer is C: Electrons are transferred → Ions form → Ions are attracted to each other

Explanation:

Generally, an ionic compound is formed between electropositive and electronegative elements.

Normally every element wants to occupy the inert gas configuration in order to be stable. During the ionic bond formation the electropositive metal will lose the electrons and forms cation. The electronegative metal will gain electrons and forms anion.

The cation is positively charged and the ion is negatively charged. Due to the coulombic force of attraction, the ions will be attracted to each other and forms an ionic compound.

One can take the example of NaCl where Na will lose one electron and form. Chlorine will take one electron and form. These ions are attracted and sodium chloride is formed.

Hence the formation of an ionic compound follows these steps-

1- First electrons are transferred.

2-The ions are formed

3-The ions are attracted to form the compound

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In the desert air, sound travels at 358 meters per second (m/s). In the polar air, sound travels at 330 meters per

Sati [7]

Answer:

The correct option is;

C. The temperature of the air affects the speed of sound

Explanation:

The information given are;

The speed with which sound travels in the desert air = 358 m/s

The speed with which sound travels in the polar air = 330 m/s

The major difference between the desert air and the polar air is that the temperature of the desert air is hotter than the temperature of the air in the polar region. Therefore the speed of sound is affected by the air temperature.

The equation that gives the relationship of the speed of sound in air, $v_{air}$ , to temperature is presented as follows;

$v_{air} = 331\frac{m}{s} \times \sqrt{\dfrac{T_K}{273 K} } = 331\frac{m}{s} \times \sqrt{1 + \dfrac{T_{^{\circ}C}}{273 ^{\circ} C} }$

Which shows that the speed of sound in air, $v_{air}$ , rises as the temperature of the air rises.

Where;

$T_{^{\circ}C}$ = The temperature of the air in degrees Celsius

$T_K$ = The temperature of the air in degrees Kelvin.

7 0

3 years ago

How much electromagnetic energy is contained in each cubic meter near the Earth's surface if the intensity of sunlight under cle

WITCHER [35]

Answer:

344.8 x10^-8J/m³

Explanation:

Using=> energy intensity/ speed oflight

= 1000/2.9x10^8

= 344.8 x10^-8J/m³

3 0

3 years ago

Consider two tubes filled with water at the same height, one with fresh water and the other tube with salt water. The pressure i

Olegator [25]

Answer:

Explanation:

The correct option for the question is B that is salt water. In salt water, the density of water is higher so the pressure at the end of tube containing salt water will be greater. As according to the hydrostatic law the pressure at a given point will be directly proportional to the distance travelled as well.

3 0

4 years ago

30 POINTS!!! PLZZZZZZ HELP

lesya [120]

Psychological disorder is a kind of disease, related to brain functioning, they are very different, but can't be distinguished at high level so they are not extremely different

In short, Your Answer would be: "False"

Hope this helps!

7 0

3 years ago

Read 2 more answers

A pole that is 2.9m tall casts a shadow that is 1.32m long. at the same time, a nearby tower casts a shadow that is 37.75m long.

Mrrafil [7]

$\frac{2.9}{1.32}$ = $\frac{x}{37.75}$

x = 82.93 m

Nothing to deal with physics.
Maths. Scale factor. Year 9.

5 0

3 years ago