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4 years ago

A person who is lightly asleep is typically displaying which pattern of brain waves?

Physics

2 answers:

mezya [45]4 years ago

5 0

They are typically displaying theta waves.

Hope this helps

ExtremeBDS [4]4 years ago

4 0

theta wave i just took the test

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How much current flows through a 12-ohm flashlight bulb operating at 3.0 volts?

babunello [35]

From the ohms law, the current through a conductor is directly proportional to the potential difference. Thus we get the equation I = V/R
where I is the current in Ampheres, V is the voltage in volts and R is the resistance in Ohms.
Hence; I = 3/12
= 0.25 Ampheres
Thus, the current through the flashlight is 0.25 Ampheres

6 0

3 years ago

Suppose that the separation between two speakers A and B is 6.60 m and the speakers are vibrating in-phase. They are playing ide

patriot [66]

Complete question

The diagram for this question is shown on the first uploaded image

Answer:

The largest possible distance is $e = 15.33 \ m$

Explanation:

From the question we are told that

The separation between Speaker at position A and B is AB = 6.60 m

The frequency of the tune which the speaker are playing is $f = 126 \ Hz$

The speed of sound is $v = 343 \ m/s$

Generally the wavelength of the tune playing is mathematically represented as

$\lambda = \frac{v}{f}$

=> $\lambda = \frac{343}{ 126}$

=> $\lambda = 2.72 \ m$

Let the observer be at position D

Generally the distance A and is mathematically evaluated using Pythagoras theorem as

$AC = \sqrt{AB ^2 + BC^2}$

Let BC = e

$AC = \sqrt{6.60 ^2 + e^2}$

Generally the path difference between the first and the second speaker from the observer point of view is mathematically represented as

$P = AC - BC$

=> $P = \sqrt{6.60 ^2 + e^2} - e$

Generally the condition for destructive interference is mathematically represented as

$P = (2n - 1 )\frac{\lambda}{2}$

Here n is the order of the fringe which is one

=> $\sqrt{6.60 ^2 + e^2} - e = (2 * 1 - 1 )\frac{2.72}{2}$

=> $\sqrt{6.60 ^2 + e^2} - e = 1.36$

=> $6.60 ^2 + e^2 =( 1.36 +e)^2$

=> $6.60 ^2 + e^2 =1.8496 + 2.72e +e^2$

=> $e = 15.33 \ m$

8 0

3 years ago

Which statement is true about the difference 2 square root of 7 − square root of 28?

Viefleur [7K]

Your list of statements doesn't have any true ones.

-- (2 square root of 7) and (square root of 28) are both the same number.

-- So if you do that subtraction, the difference is zero.

3 0

3 years ago

17.) A microwave is rated at 750 watts. How long will it take the microwave to do 5700 J of work on a cup of water? Assume 100%

Lubov Fominskaja [6]

To answer the question above, we make use of the equation,
Work = Power x time
From the equation, time may be solved through
time = Work / Power
Substituting the known values from the given,
time = (5700 J) / (750 J/s)
= 7.6 s

7 0

3 years ago

Help me solve this please

Wewaii [24]

Answer:

<h2>option b , 2A</h2>

Explanation:

thus

so putting values we get,

I = 120/ R

for the value of R...

R(series) = R1 + R2 + R3

R= 20 + 20+ 20 = 60 ohm

thus, I=120/60 = 2

Therefore,

7 0

4 years ago