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4 years ago

Which stage of sleep usually comes before REM sleep

Physics

2 answers:

kumpel [21]4 years ago

7 0

Stage 4

Hope this helps

ZanzabumX [31]4 years ago

6 0

After stage 3 sleep, stage 2 sleep is repeated before entering REM sleep.

On average, we enter the REM stage approximately 90 minutes after falling asleep. The first cycle of REM sleep might last only a short amount of time, but each cycle becomes longer. REM sleep can last up to an hour as sleep progresses.

Most likely it would be C, Hope this helps!

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Two straight wires separated by a very small distance run parallel to each other, one carrying a current of 3.0 A to the right a

Lyrx [107]

Answer:

Explanation:

I1 = 3 A right

I2 = 6.8 A left

Let the distance is r from both the wires on the same side.

The formula for the magnetic field is given by

$B =\frac{\mu _{0}}{4\pi }\frac{2i}{r}$

As the direction of current in both the wires is opposite to each other

so the net magnetic field is

B = B2 - B1

$B =\frac{\mu _{0}}{4\pi }\frac{2i_{2}}{r}-\frac{\mu _{0}}{4\pi }\frac{2i_{1}}{r}$

$B =\frac{\mu _{0}}{4\pi }\frac{2\times 6.8}{r}-\frac{\mu _{0}}{4\pi }\frac{2\times 3}{r}$

$B =\frac{\mu _{0}}{4\pi }\frac{7.6}{r}$

8 0

3 years ago

The diagram below shows a subduction zone where oceanic crust is sinking into the mantle underneath continental crust as two

Scrat [10]

Metal ores

Explanation:

in an area where subduction has occurred in times past, metal ores are likely to be found.

Metallic ores find subduction zone regions very favorable to crystallize out of a magma.

Ores have different modes of formation.
Typically, they are found in hydrothermal vents and black smokers of igneous intrusives.
These are igneous terrains where metallic sulfides and other minerals crystallize out of magmatic body.
Metals in magma usually have large sizes and do not partition easily in the melt.

At a subduction zone, partial melting of the subducting plate forces magma into nearby country rock as an intrusive and to the ocean floor where they form black smokers.

Learn more:

Rocks brainly.com/question/2740663

#learnwithBrainly

4 0

3 years ago

you realize that your friend is clearly distracted and not paying attention to everything that is happening on the road. describ

alekssr [168]

A. ask him/her to pull over and offer to drive (if you have your license.)
B. ask him/her to call someone to come pick you guys up.
C. call a cab.

8 0

3 years ago

Rocket can propel itself in a vacuum. True or false

makkiz [27]

Answer:

Yes.

Explanation:

Rocket can propel itself in vacuum because the thrust is provided as a reaction to the the gases coming out of rocket, which have nothing to do with vacuum.

3 0

3 years ago

What waves have high amplitudes

Olegator [25]

-- loud sounds

-- bright lights

-- strong radio signals

-- Slinkies that can pinch you painfully

-- a tsunami in the ocean

-- earthquakes above Richter 5 or 6

5 0

4 years ago