3 years ago

If an element has an atomic number of 28, how many protons does it have in its nucleus?

Physics

2 answers:

inna [77]3 years ago

8 0

It’s 28 protons actually

kondor19780726 [428]3 years ago

4 0

I think the answer is 28 protons

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borishaifa [10]

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3 years ago

Find the self-inductance of a 1700-turn solenoid 55 cm long and 4.0 cm in diameter. Express your answer with the appropriate uni

Nitella [24]

The self-inductance of the solenoid is 8.25 mH.

The given parameters;

number of turns, N = 1700 turn
length of the solenoid, l = 55 cm = 0.55 m
diameter of solenoid, d = 4 cm
radius of the solenoid, r = 2 cm = 0.02 m

The area of the solenoid is calculated as follows;

$A = \pi r^2\\\\A = \pi \times (0.02)^2\\\\A = 0.00125 \ m^2$

The self-inductance of the solenoid is calculated as follows;

$L = \frac{\mu_o N^2 A }{l} \\\\L = \frac{(4\pi \times 10^{-7}) \times 1700^2 \times 0.00125}{0.55} \\\\L = 0.00825 \ H\\\\L = 8.25\ mH$

Thus, the self-inductance of the solenoid is 8.25 mH.

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3 years ago

If the wavelength of a wave of light is 4.57x10^-9 m what is the frequency

alexandr402 [8]

Answer:

$6.5646\times 10^{16}~ \text{Hz}$

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$\text{Frequency,}~ f= \dfrac{c}{\lambda} = \dfrac{3\times 10^8 }{4.57 \times 10^{-9}} = 6.5646\times 10^{16}~ \text{Hz}$

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2 years ago

Is lateral shift or lateral displacement same ?

xxMikexx [17]

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When a ray of light passes through a glass slab of a certain thickness, the ray gets displaced or shifted from the original path. This is called lateral shift/displacement.

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3 years ago

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