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Lyrx [107]
3 years ago
11

Which statement is true about magnetic poles?

Physics
2 answers:
ANEK [815]3 years ago
6 0
The correct answer is North & South poles attract each other. This is because opposites attract. If it were a north & north pole they'd repel each other, same if it were a south & south pole. This is because each magnetic field has a way of attracting two opposite poles (north to south, south to north).
Vlada [557]3 years ago
5 0
<h3><u>Answer;</u></h3>

<em>North and south poles attract each other.</em>

<h3><u>Explanation;</u></h3>
  • <em><u>A magnet</u></em> is a material that has an ability to produce magnetic fields.
  • A<em><u> magnet has two poles, north pole and a south pole</u></em>. The north pole is the side which points north when a magnet is freely suspended on air, while south pole is the pole that points south.
  • <em><u>Based on the basic law of magnetism, like poles repel while unlike poles attract</u></em>. Therefore, north pole attracts with a south pole, but repels another north pole. Two north poles repel while two south poles also repel.
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A gas bottle contains 0.250 mol of gas at 730 mm hg pressure. if the final pressure is 1.15 atm, how many moles of gas were adde
Ludmilka [50]

Answer: 0.049 mol



Explanation:



1) Data:


n₁ = 0.250 mol

p₁ = 730 mmHg

p₂ = 1.15 atm

n₂ - n₁ = ?


2) Assumptions:


i) ideal gas equation: pV = nRT


ii) V and T constants.


3) Solution:


i) Since the temperature and the volume must be assumed constant, you can simplify the ideal gas equation into:


pV = nRT ⇒ p/n = RT/V ⇒ p/n = constant.


ii) Then p₁ / n₁ = p₂ / n₂


⇒ n₂ = p₂ n₁ / p₁


iii) n₂ = 1.15atm × 760 mmHg/atm × 0.250 mol / 730mmHg = 0.299 mol


iv) n₂ - n₁ = 0.299 mol - 0.250 mol = 0.049 mol

7 0
3 years ago
a 1 kg emery stone measuring 20 cm redium, is rotating with an angular speed of 39 revolutions per minute, when the motor is tur
musickatia [10]

Answer: 13,24

Explanation:

3 0
3 years ago
PLEASE HELP!!!
Arisa [49]

Answer:

Each type of electromagnetic radiation have been matched to their descriptions as follows:

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Explanation:

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6 0
3 years ago
In the graph below, why does the graph stop increasing after 30 seconds?
stepladder [879]

Answer:

The answer is "Option C".

Explanation:

It's evident from the figure below that after thirty minutes, not no more hydrogen can be created because all of the reactants have converted into products.

hydrogen gas created in cm cubes per period x = 20 seconds, y = 45 centimeters squared, and so on.

A reaction's terminus (the graph's flat line) indicates that no further products are being created during the reaction.

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3 years ago
The acceleration due to gravity on the surface of Jupiter is about 2.5 times the acceleration due to gravity on Earth’s surface.
Ann [662]

Answer: The correct answer is option C.

Explanation:

Weight = Mass × Acceleration

Let the mass of the space probe be m

Acceleration due to gravity on the earth = g

Weight of the space probe on earth = W

W=m\times g

Acceleration due to gravity on the Jupiter = g' = 2.5g

Weight of the space probe on earth = W'

W'=mg'=m\times 2.5g

\frac{W'}{W}=\frac{m\times 2.5g}{m\times g}

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The weight of the space probe on the Jupiter will be 2.5 times the weight of the space probe on earth.

Hence, the correct answer is option C.

6 0
3 years ago
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