3 years ago

How do chemical formulas represent compounds? Help PLEASE

2 answers:

4 0

Chemical formulas represent compounds by listing the elements and number of atoms in the compound.
Example, H2O. In every water molecule, there are always two hydrogen atoms and one oxygen atom.

FromTheMoon [43]3 years ago

3 0

Water salt atomc chemical symbolos

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The tuning fork has a frequency of 426.7 is found to cause resonance in a closed column of air measuring 0.186 (the diameter of

lidiya [134]

Answer:

The velocity of the tuning fork sound is 317.4648 m/s

Explanation:

The given parameters are;

The frequency of the fork, f = 426.7 Hz

The length of the closed air column, L = 0.186 m

The diameter of the tube, d = 0.15 m

At the fundamental frequency in a closed tube, we have;

λ = 4·L

Where;

λ = The wavelength of the wave

L = The length of the tube

From the equation for the velocity of a wave, we have;

v = f·λ

Where;

v = The velocity of the (sound) wave

f = The frequency of the wave = 426.7 Hz

λ = 4·L = 4 × 0.186 m = 0.744 m

∴ v = 426.7 Hz × 0.744 m = 317.4648 m/s

Therefore, the velocity of the sound produced by the tuning fork, v = 317.4648 m/s

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3 years ago

Nevine wants to improve her JavaScript program's efficiency and scalability by defining her own processes, or functions. Why are

alex41 [277]

Because they perform specific tasks repeatedly throughout your program, as needed

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4 years ago

An electric field of 1.27 kV/m and a magnetic field of 0.490 T act on a moving electron to produce no net force. If the fields a

lesantik [10]

Answer:

v = 2591.83 m/s

Explanation:

Given that,

The electric field is 1.27 kV/m and the magnetic field is 0.49 T. We need to find the electron's speed if the fields are perpendicular to each other. The magnetic force is balanced by the electric force such that,

$qE=qvB\\\\v=\dfrac{E}{B}\\\\v=\dfrac{1.27\times 10^3}{0.49}\\\\v=2591.83\ m/s$

So, the speed of the electron is 2591.83 m/s.

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3 years ago

What factors that affect magnetic force

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Answer:

Strong electrical currents in close proximity to the magnet.

Other magnets in close proximity to the magnet.

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Explanation: Heat radiation

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3 years ago

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A ray of light strikes a plane mirror at an angle of incidence 35°. If the mirror is rotated through 10°.

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Answer:

1 35°

2 20°

3 50°

..............

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3 years ago