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3 years ago

What can you predict about an element from its position in the periodic table

1 answer:

5 0

Based on its position in the periodic table, you can predict how many electrons it has, how many valence electrons, how many levels of electrons, and its atomic number and mass.

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The machine which turns in a power station

Anna [14]

Answer:

generators

Explanation:

the machine which turns in a power station

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3 years ago

A person sitting on a pier observes incoming waves that have a sinusoidal form with a distance of 2.5 m between the crests. Of a

Doss [256]

Answer:

Part(a): The frequency is $\bf{0.2~Hz}$ .

Part(b): The speed of the wave is $\bf{0.5~m/s}$ .

Explanation:

Given:

The distance between the crests of the wave, $d = 2.5~m$ .

The time required for the wave to laps against the pier, $t = 5.0~s$

The distance between any two crests of a wave is known as the wavelength of the wave. So the wavelength of the wave is $\lambda = 2.5~m$ .

Also, the time required for the wave for each laps is the time period of oscillation and it is given by $T = 5.0~s$ .

Part(a):

The relation between the frequency and time period is given by

$\nu = \dfrac{1}{T}~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(1)$

Substituting the value of $T$ in equation (1), we have

$\nu &=& \dfrac{1}{5.0~s}\\~~~&=& 0.2~Hz$

Part(b):

The relation between the velocity of a wave to its frequency is given by

$v = \nu \lambda~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(2)$

Substituting the value of $\nu$ and $\lambda$ in equation (2), we have

$v &=& (0.2~Hz)(2.5~m)\\~~~&=& 0.5~m/s$

5 0

2 years ago

Why do organisms need nitrogen

Yuri [45]

Plants and animals need nitrogen in order to make proteins. Proteins are essential compounds for healthy growth and fully functioning organisms.

4 0

3 years ago

An ideal gas is sealed in a container at constant volume. if the temperature t is increased to 4t, the pressure will be:

Westkost [7]

I believe that it would increase to 4p

6 0

3 years ago

Read 2 more answers

If the speed of the wave along the rope is 3.2 m/s. Calculate the frequency of the wave

kotykmax [81]

Answer:

2Hz

Explanation:

Find the diagram attached

Using the formula;

v = fλ

v is the velocity

f is the frequency

λ is the wavelength

Given the following

v = 3.2m/s

λ = 4.8/3 = 1.6m

Get the frequency

f = v/λ

f = 3.2/1.6

f = 2Hertz

Hence the frequency of the wave is 2Hz

4 0

3 years ago