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3 years ago

Why do these two magnets attract each other?

Physics

2 answers:

Ber [7]3 years ago

7 0

Answer:

A. The poles that face each other are opposite magnetic poles.

Liono4ka [1.6K]3 years ago

5 0

Answer:

Explanation:

When two magnets are brought near each other, like poles repel; opposite poles attract. We like to represent this force effect of a magnet on iron-like objects with a concept called magnetic field. The concept of field can be best understood if we remember the gravitational force of Earth on object near it.

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A brave child decides to grab onto an already spinning merry‑go‑round. The child is initially at rest and has a mass of 34.5 kg.

ozzi

Answer:

$I_1 = 32.5 kg m^2$

Explanation:

Here as we know that total angular momentum is always conserved for child + round system

so here by angular momentum conservation we have

$I_1 \omega_1 = (I_1 + I_2)\omega_2$

here we have

$I_2 = mR^2$ (inertia of boy)

$I_2 = (34.5)(1.45^2)$

$I_2 = 72.5 kg m^2$

now we have

$I_1(2\pi 55) = (I_1 + 72.5)(2 \pi 17)$

$I_1 = (I_1 + 72.5)(0.31)$

$I_1(1 - 0.31) = 22.4$

$I_1 = 32.5 kg m^2$

3 0

3 years ago

An object is moving east with a constant speed of 30 m/s for 5 seconds. What is the object’s acceleration?

Shtirlitz [24]

Answer:

6 m/s²

Explanation:

From the question given above, the following data were obtained:

Velocity (v) = 30 m/s

Time (t) = 5 s

Acceleration (a) =..?

Acceleration is defined mathematically as:

Acceleration (a) = Velocity (v) /time (t)

a = v /t

With the above formula, we can obtain the acceleration of the object as follow:

Velocity (v) = 30 m/s

Time (t) = 5 s

Acceleration (a) =..?

a= v/t

a= 30/5

a = 6 m/s²

Therefore, the acceleration of the object is 6 m/s² due East.

7 0

3 years ago

Match the following Help please

maxonik [38]

<h2>Amoeba / Unicellular</h2><h2>Segmented worm / Earthworm</h2><h2>Unsegment worm / Tapeworm</h2><h2>Snail / Molluscs</h2><h2>Butterfly / A pair of antenna</h2><h2 /><h3><em>Unicellular: </em><u><em>aboema</em></u><em>: a </em><u><em>one-celled</em></u><em>, microscopic organism belonging to any of several families of rhizopods that move and feed using pseudopodia and reproduce by fission</em></h3><h3><em /></h3><h3><em>Segmented worms: segmented worms include the common </em><u><em>earthworm</em></u><em> and leeches.</em></h3><h3><em /></h3><h3><u><em>Unsegented worms:</em></u><em> unsegmented Worms Phylum Platyhelminthes & Nematoda. Worms. Worms are divided into three different phyla: Phylum Platyhelminthes, the flatworms. These include marine flatworms, flukes, and </em><u><em>tapeworms</em></u><em>.</em></h3><h3><em /></h3><h3><u><em>Molluscs</em></u><em>: molluscs examples: – </em><u><em>snails</em></u><em>, slugs, limpets, whelks, conchs, periwinkles, etc. Class Bivalvia – clams, oysters, mussels, scallops, cockles, shipworms, etc. The Class Scaphopoda contains about 400 species of molluscs called tooth or tusk shells, all of which are marine.</em></h3><h3><em /></h3><h3><u><em>Antennas</em></u><em>: </em><u><em>Nearly all insects have a pair of antennae</em></u><em> on their heads. They use their antennae to touch and smell the world around them. ... Insects are the only arthropods that have wings, and the wings are always attached to the thorax, like the legs.</em></h3>

7 0

3 years ago

Electric field lines show the strength and _____ of an electric field.

Gwar [14]

So we want to know what do electric field lines show except strength of the electric field. Electric field lines are lines that show us the field strength and the DIRECTION of the electric field. If the lines point away from the charge that is producing the lines, the charge is positive, and if the lines point towards the charge that is producing them that charge is negative.

8 0

3 years ago

Over time Pangaea broke apart to form other continents.

Travka [436]

Answer:

jwhgrewhuejqiwmkosjcdihwbfuqjiwdkmojcshidvwuf hiiii againnnn :)) good luck

6 0

3 years ago