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2 years ago

Alchemists searched for ways to change lead into gold. Which type of change

Physics

2 answers:

ipn [44]2 years ago

6 0

Answer:

It's had to be a Nuclear change since by nuclear fusion we can convert lead to Gold.

Therefore <u>Option B. Nuclear Change</u> is Answer.

By : Modern Einstein

marta [7]2 years ago

6 0

Nuclear, chemical relates to compounds and other things, physical is phase changes or mixing, nuclear is right because for lead to become cold the nucleus of the atom would have to change the amount of protons present

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Who theorized that electromagnetic radiation is emitted from a black hole due to quantum effects near the event horizon. Hint: A

wolverine [178]

Answer:

Stephen William Hawking

Explanation:

Stephen William Hawking was a popular theoretical physicist born on 8th January 1942.

He served as the professor of mathematics at the Cambridge university

He was director at the center for theoretical cosmology.

He has theorized that the black holes will emit radiations and the radiations is known by his name Hawking's radiation.

His book 'The Brief History of Time' appeared as one of the best seller according to the Sunday Times.

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He received numerous awards and elected as the fellow of royal society.

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6 0

3 years ago

How much current is drawn by a television with a resistance of 30 ω that is connected across a potential difference of 120v?

melomori [17]

By using the Ohms law, we can calculate the current.

Ohms law,

$\frac{V}{I} = R$

Here, V is potential difference, and R is the resistance.

Given, $V=120 V$ and $R = 30 ohm$ .

Therefore, putting the given values in above relation , we get

$\frac{120V}{I} = 30 ohm$

or $I=\frac{120}{30} = 4 A$

Thus, the current is drawn by a television 4 Ampere

8 0

4 years ago

Light of wavelength 633 nm falls on a single slit 0.5 mm wide and forms a diffraction pattern on a screen 1.0 m away from the sl

andrey2020 [161]

Answer:

The position of the first dark spot on the positive side of the central maximum is 1.26 mm.

Explanation:

Given that,

Wavelength of light is 633 nm.

Slit width, d = 0.5 mm

The diffraction pattern forms on a screen 1 m away from the slit. We need to find the position of the first dark spot on the positive side of the central maximum.

For destructive interference :

$\dfrac{dY}{D}=n\lambda$

Y is the distance of the minima from central maximum

Here, n = 1

$Y=\dfrac{n\lambda D}{d}\\\\Y=\dfrac{1\times 633\times 10^{-9}\times 1}{0.5\times 10^{-3}}\\\\Y=0.00126\ m\\\\Y=1.26\times 10^{-3}\ m\\\\Y=1.26\ mm$

So, the position of the first dark spot on the positive side of the central maximum is 1.26 mm.

4 0

3 years ago

To find the number of neutrons in an atom, what would you subtract?

kolezko [41]

You look up the element in the periodic table. Subtract the atomic number (small number) from the mass number (big number). The answer is the number of neutrons.

7 0

3 years ago

You bicycled for 3 hours and traveled 18 miles.What is your average speed?

shusha [124]

18 miles/3 hours=6 mph

3 0

3 years ago

Read 2 more answers