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3 years ago

The fact that something is magnetic can be determined by watching its what?

1 answer:

6 0

You can check if something is magnetic by watching if it's attracted/repelled by a magnet.

That's the same as saying that the fact that something is magnetic can be determined by watching its behavior.

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In a fluorescent tube of diameter 3 cm, 3 1018 electrons and 0.75 1018 positive ions (with a charge of e) flow through a cross-s

Vinil7 [7]

Answer:

The current in the tube is 0.601 A

Explanation:

Given;

diameter of the fluorescent, d = 3 cm

negative charge flowing in the fluorescent tube, -e = 3 x 10¹⁸ electrons/second

positive charge flowing in the fluorescent tube, +e = 0.75 x 10¹⁸ electrons/ second

The current in the fluorescent tube is due to presence of positive and negative charges to create neutrality in the conductor (fluorescent tube).

Q = It

I = Q/t

where;

I is current in Ampere (A)

Q is charge in Coulombs (C)

t is time is seconds (s)

1 e = 1.602 x 10⁻¹⁹ C

3 x 10¹⁸ e/ s = ?

= (3 x 10¹⁸ e/s x 1.602 x 10⁻¹⁹ C) / 1e

= 0.4806 C/s

negative charge per second (Q/t) = 0.4806 C/s

positive charge per second (Q/t) = (0.75 x 10¹⁸ e/s x 1.602 x 10⁻¹⁹ C) / 1e

positive charge per second (Q/t) = 0.12015 C/s

Total charge per second in the tube, Q / t = (0.4806 C/s + 0.12015 C/s)

I = 0.601 A

Therefore, the current in the tube is 0.601 A

7 0

3 years ago

A candy-filled piñata is hung from a tree for Matthew's birthday. During an unsuccessful attempt to break the 4.4-kg piñata, Hay

Margaret [11]

Answer:

The speed of the piñata immediately after being cracked by the stick is $v_{fp}=0.59\: m/s$ .

Explanation:

Using the conservation of linear momentum:

$m_{s}v_{is}=m_{p}v_{fp}$ (1)

Here:

m(s) is the mass of the stick

m(p) is the mass of the piñata

v(is) is the initial velocity of the stick

v(fp) is the final velocity of the piñata

So, we just need to solve the equation (1) to v(fp).

$v_{fp}=\frac{m_{s}v_{is}}{m_{p}}$

$v_{fp}=\frac{0.54*4.8}{4.4}$

$v_{fp}=0.59\: m/s$

I hope it helps you!

8 0

3 years ago

What does decelerate mean

fenix001 [56]

To slow down or reduce speed.

5 0

3 years ago

What is a robin is it a herbivores or carnivores or omnivores or decompers

Arlecino [84]

A robin is a small carnivore bird which feed on insects, earthworms, spiders and bees. It needs about 60 calories per day from these organisms. This bird has a short lifespan of only 7 years. Hope this answers the question. Have a nice day.

8 0

3 years ago

What are some ways that humans depend on the ocean?

yulyashka [42]

Answer:

A lot of the earth oxygen comes from the ocean around 50%-80%

Explanation:

5 0

3 years ago

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