3 years ago

Does anyone know number 19 and 23?

1 answer:

6 0

For 19 it's (d) mass.

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matrenka [14]

#1 A) Long wavelength and high frequency.

#2) A) Brightness.

#3) D) They are used to examine things.

#4) B) Compression and visible light waves.

5 0

3 years ago

maw [93]

Pretty sure the first one

8 0

4 years ago

aleksklad [387]

Answer:

The magnitude of charge is $8.809\times 10^{-7}\ C$ with a positive charge.

Explanation:

Given that,

The potential due to a point charge, $V=5.05\times 10^2\ V$

Distance, d = 15.7 m

The potential due to a point charge is given by :

$V=\dfrac{kq}{d}$

q is charge

k is electrostatic constant

$q=\dfrac{Vd}{k}\\\\q=\dfrac{5.05\times 10^2\times 15.7}{9\times 10^9}\\\\q=8.809\times 10^{-7}\ C$

Here, the potential is positive, then the magnitude of charge is $8.809\times 10^{-7}\ C$ with a positive charge.

5 0

3 years ago

RSB [31]

Answer: Magnesium

Explanation: Magnesium is the only option with an ionic radius smaller than that of Calcium.

7 0

3 years ago

Lerok [7]

Answer:

wroung is wrong steatment is wrong

Explanation:

spelling error also speed of sound in air is 721 mph

5 0

3 years ago