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4 years ago

An element with 1 valence electron has a charge of

1 answer:

6 0

An element with 1 valence electron has a charge of -1, because there is an extra negatively charged electron attached to the ion.

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A 1.0-m-tall vertical tube is filled with 20°C water. A tuning fork vibrating at 580 Hz is held just over the top of the tube as

Mademuasel [1]

Answer:

water heights of the tube are 0.851 m , 0.553 m, 0.255 m

Explanation:

given data

frequency = 580 Hz

temperature = 20°C

tube = 1 m

to find out

water heights of the tube

solution

we will apply here formula for length that is

length L = v ( 2n -1 ) / 4f

here v is velocity o sound that is 343.2 m/s

so for n = 1

L = 343.2 ( 2(1) -1 ) / 4(580) = 0.147931 m

for n = 2

L = 343.2 ( 2(2) -1 ) / 4(580) = 0.443793 m

for n = 3

L = 343.2 ( 2(3) -1 ) / 4(580) = 0.739655 m

for n = 4

L = 343.2 ( 2(4) -1 ) / 4(580) = 1.035517 m is greater than 1

and so here height is measured less than 1 m

so water heights of the tube are 1 m - 0.147931 m , 1 m - 0.443793 m, 1 m - 0.739655 m

so water heights of the tube are 0.851 m , 0.553 m, 0.255 m

3 0

3 years ago

What is the purpose of control group ?

kirill [66]

Control group in a scientific experiment is a group separated from the rest of the experiment, it is where the independent variable being tested cannot influence the results. It isolates the independent variable's effects on the experiment and can helps rule out alternative explanations of the experimental results.

6 0

3 years ago

Difference between force and acceleration

galina1969 [7]

Force your doing it purposely and acceleration it’s just happening

7 0

3 years ago

Read 2 more answers

What happens to the frequency and pitch of sound if the object making the sound moves away from you ?

Olin [163]

If you and the source of sound are moving apart, then the pitch (frequency) you hear is lower than the pitch (frequency) that's actually leaving the source.

It doesn't matter whether you or the source is the one moving, only that the distance between you is increasing.

8 0

3 years ago

The emission of a Beta particle has the effect of?

Zarrin [17]

Answer: No change in mass

Explanation:

Beta-emission: In this process, a neutron gets converted into a proton and an electron. The electron is referred to as a beta-particle. The beta particle released carries a charge of -1 unit and has negligible mass.

General representation of an element is given as: $_Z^A\textrm{X}$

Z= Atomic number

A = mass number

X = chemical symbol of element

$_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{Y}+_{-1}^0\beta$

4 0

4 years ago