when a ray of unpolarized light encounters a polarization filter, the ray's intensity is reduced by one-half . if it then encounters a second polarization filter with axis perpendicular to the first filter, the intensity is reduced to zero .

Geostationary satellites are useless for meteorologists at 3am.

Geostationary satellites orbit the Earth at an altitude of approximately 36,000 km and have an orbital period that matches the Earth's rotation period, so they appear to remain fixed over a particular location on the Earth's surface.

However, geostationary satellites are only useful for meteorologists during the daytime hours when there is sufficient sunlight to illuminate the Earth's surface. At night, there is no sunlight to reflect off the surface of the Earth, making it difficult for geostationary satellites to provide useful data.

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One type of self-report inventory test is the Beck Depression Inventory (BDI).

Self-report inventory evaluations are frequently used in psychology and psychiatry to study a person's thoughts, feelings, attitudes, and behaviors.

The Beck depressive Inventory (BDI) is a widely used assessment tool for assessing the severity of depressive symptoms in individuals. It is made up of 21 statements, each of which describes a depressed symptom for example, "I feel sad all the time".

The test taker is asked to assess how much they have experienced each symptom in the preceding week on a 4-point scale ranging from 0 (not at all) to 3 (very).

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Answer:

 V₁ = 6 V ,  V₂ = V₃ = 3 V

Explanation:

To solve this circuit we must remember that there are two fundamental types of construction in series and parallel.

* a serial circuit there is only one path for current

in this circuit the constant current in the entire circuit and the voltage is the sum of the voltage of each term

* Parallel circuit in this there are two or more paths for the current

in this circuit the voltage is constant and the east is divided between each branch

with these principles let's analyze the proposed circuit

The DC battery is in parallel with resistor R1 and the equivalent of the other branch,

as in a parallel circuit the voltage is constant

               V₁ = 6 V

in the other branch (23) it forms a series construction, where the current is constant

               6 = iR₂ + iR₃

as they indicate that each resistance has the same value

              6 = 2 iR

              V = V₂ = V₃ = 3 V

Answer:

Fun facts about matter

States of Matter: Facts

Matter is all around us. Matter is the air you are breathing. ...

Solids. Matter that is composed of atoms packed tightly together are known as solids. ...

Liquids. Liquids do not hold their shape at room temperature. ...

Gases. ...

Change of State. ...

More About Atoms. ...

Elements. ...

Compounds.

The gravitational force exerted on the moon while it is in orbit around the planet is 1 × 10¹⁹ N.

Given:

Mass of the moon (m) = 1 × 10²² kg

Gravitational field strength (g) = 0.001 N/kg

The gravitational force is given by:

Gravitational force (F) = mass of the moon (m) ×  gravitational field strength (g)

F = 1 × 10²²  ×  0.001

F = 1 × 10²² ×  0.001

F = 1 × 10¹⁹ N

Hence, The gravitational force exerted on the moon while it is in orbit around the planet is 1 × 10¹⁹ N.

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Answer:

y = m λ L / d

must use lasers of greater wavelength

Explanation:

The expression for the constructive interference of a double slit is

           d sin θ = m λ

let's use trigonometry to find the angle

          tan θ = y / L

in interference phenomena the angles are small

         tan θ= sin θ/ cos θ = sin θ

         sin θ = y / L

we subjugate

         d y / L = m λ

         y = m λ L / d

In this expression we see that the separation of the lines (and) increases linearly with the wavelength, therefore we must use lasers of greater wavelength

The speed of the wind is 17 mph and the speed of the plane in still air is 119 mph.

Let the speed of the plane be x and the speed of the wind be y. Then, the speed of the plane with the wind becomes x + y, while the speed of the plane against the wind is x - y.

The distance traveled with the wind in 3 hours is 408 miles.

Therefore, we can write the equation as:

3(x + y) = 408

Divide both sides by 3:

x + y = 136  .... (1)

The distance traveled against the wind in 4 hours is also 408 miles.

Therefore, the equation can be written as:

4(x - y) = 408

Divide both sides by 4:

x - y = 102  .... (2)

Now we can solve these two equations using the elimination method.

Add equations (1) and (2):

x + y + x - y = 136 + 1022x = 238x = 119 mph

Therefore, the speed of the plane in still air is 119 mph.

Now, substitute this value of x in equation (1):

119 + y = 136y = 17 mph

Therefore, the speed of the wind is 17 mph.

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The correct question is:

A plane flies 408 mi with the wind in 3 hr. The return trip takes 4 hr. What is the speed of the wind and the speed of the plane in still air?

-- Well first of all, the waves are transverse waves.  The fibers in the rope, and the hand that generates the waves, are moving up and down, but the wave is moving to the right, towards the wall.  These directions are perpendicular.

-- Later on, after the waves reflect from the wall and travel back toward the hand, there are going to be standing waves on the rope.  But this is probably beyond the scope of the question.

Answer:

= 1440 kg·m/s

Explanation:

Step by Step Solution to find Momentum of Mass = 288 kg & Velocity = 5 m/s:

Given that,

mass (m) = 288 kg

velocity (v) = 5 m/s

Substitute the value into the formula

p = 288 x 5

p = 1440 kg·m/s

∴ Momentum (p) =1440 kg·m/s

A light-year is a unit of distance, specifically the distance that light travels in one year.

Light travels at a speed of approximately 299,792 kilometers per second (or about 186,282 miles per second) in a vacuum. Therefore, to determine which planet is 20 light-years away from Earth, we need to identify a planet located at a distance of approximately 20 times this speed of light.

As of my knowledge cutoff in September 2021, no known exoplanets have been directly observed and confirmed to be located exactly 20 light-years away from Earth. However, there are numerous exoplanets that have been discovered within a range of distances from Earth.

Some notable exoplanets discovered within approximately 20 light-years of Earth include:

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Current is the name for the movement of electricity. Metals are often excellent conductors, allowing electricity to flow smoothly. Insulators are substances that make it difficult for electricity to pass through them.

Insulators are substances that affect the flow of electrons in exactly the opposite way from conductors. They restrict the ease with which electrons can move between atoms.  These electrons cannot be free to move and cannot be shared by nearby atoms.

There must be no energy gap between a material's valence band and conduction band for it to conduct electrical current. As a result, these bands overlap in conductors, enabling electrons to pass through.

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Streptococcus is the genus that is the most common resident biota of mouth surfaces

The most well known genus is Streptococcus.

Streptococcus bacterium of a genus that includes the agents of souring of milk and dental decay, and hemolytic pathogens causing various infections such as scarlet fever and pneumonia.

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If negligible velocity at inlet (C 1 ≈0), the velocity (C2) of steam (in m/s) at the nozzle exit is 447.21 m/s.

According to question:

The steady flow energy equation for steady flow devices

m (h1 + ((c1)2/2) + z1g) + Q = m (h2 + ((c2)2/2) + z2g) + Wcv

C1 = 0

Wcv = 0

z1 = z2

mh1 + Q = mh2 + m((C2)2/2)

m((C2)2/2) = m(h1-h2) + Q

0.1 × ((C2)2/2) × 10-3 = 0.1(2500-2350) -5

C2 = 447.21 m/s

Thus, the negligible velocity at inlet (C 1 ≈0), the velocity (C2) of steam (in m/s) at the nozzle exit is 447.21 m/s.

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The number of significant figures in 00.6022009 is 7 .

The number of significant figures is 7.

Explanation:

Significant figures

Given :

The number 00.6022009

To find:

The number of significant figures in the number.

Solution

00.6022009

All zero’s preceding the first integers are not significant.

Zeros in between the integers are significant

So, the number of significant figures is 7.

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Explanation:

"1 meter per second per second" means acceleration of an object. It is equal to the rate of change of velocity. Its SI unit is \(m/s^2\).

It is simply given by :

\(a=\dfrac{dv}{dt}\)

dv is change in velocity

dt is small interval of time

"1 meter per second per second" means that the velocity of an object can increase by 1 meter per second.

Based on the nature of variables, none of the evidence card should be eliminated because they all represent variables.

Variables refers to any quantity that can have various values.

Variables include age, time , distance, height, speed, etc.

Variables can either be independent, dependent or constant.

There, none of the evidence card should be eliminated because they all represent variables.

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A race car is moving at a constant speed around a track. The race car is changing its velocity as the direction of motion changes.

The primary indicator of an object's position and speed is its velocity. It is the distance that an object travels in one unit of time. The displacement of the item in one unit of time is the definition of velocity.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.

As the race car is moving at a constant speed around a track, the magnitude of velocity remains same but during race it may changes its direction of motion, that is why, velocity of it, which depends on both magnitude and direction, may changes.

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Answer:

E

Explanation:

Answer:

An echo is formed as a result of reflection of the original sound which returns to the listener. You might have experienced Echo in an EMPTY ROOM but no echo is produced after the room is occupied. To avoid echo from being produced the echo has to be absorbed.

Explanation:

Let the angle between the polarizing axes of the two filters be

Let the intensity of polarized light coming out of the first polarizing filter be I1.

Then the intensity of the second polarizing filter will be

Thus, the correct option is B.

The inertia of the elephant Mel in terms of the inertia Mm of the monkey is 2Mm

the moment = 0

from monkey & giraffe

Mm*3d = Mg*d

Mg = 3*Mm

-------------------

for Me  & Mg

(Mg + Mm)*2d = Me*4d

(3Mm+Mm)*2d = Me*4d

4*Mm*2 = 4*Me

Me = 2Mm

Until some force changes the speed or direction of an object, it will continue to move in the same direction. This is known as inertia. The phrase is correctly understood as a shortened form of "the principle of inertia," which is a concept that Newton discussed in his first law of motion. Unless influenced by an unbalanced force, an object at rest stays at rest, and an object in motion stays in motion while maintaining a constant speed and a straight line. An object at rest has a tendency to stay at rest, and an object in motion has a tendency to continue moving in a straight line at a constant speed.

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Answer:

5,760

Explanation:

1 minute is equal to 60 seconds. so you will multiply 60 times 96. and that equals 5,760

Answer:

A body will become positively charged when some electrons will come out from the body.Thus, positive charge is due to deficiency of electrons.

Answer:

satellite B

Explanation:

A .F= G (mM)/r²

B .F= G (2mM)/r² = 2G (Mm)r²

C .F= G (3mM)/(2r)² = ¾G (mM)/r²

D .F= G (4mM)/(2r)² = G (mM)/r²

The speed of the wave is 0.42 m/s.

Speed is the rate of change of distance.

To calculate the speed of the wave, we use the formula below,

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

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Complete question: The crests of waves passing into a harbor are 2.1 m

apart and have an amplitude of 60 cm. 12 waves

pass an observer every minute. What is the speed of the wave.

\(\\ \rm\Rrightarrow \dfrac{1}{u}+\dfrac{1}{v}=\dfrac{1}{f}\)

\(\\ \rm\Rrightarrow \dfrac{1}{u}=\dfrac{1}{-10}+\dfrac{1}{38}\)

\(\\ \rm\Rrightarrow \dfrac{1}{u}=\dfrac{-19+5}{190}\)

\(\\ \rm\Rrightarrow \dfrac{1}{u}=\dfrac{-14}{190}\)

\(\\ \rm\Rrightarrow u=\dfrac{190}{-14}\)

\(\\ \rm\Rrightarrow u=13.6cm\)

Real

When testing a fiber-optic splitter with an optical time domain reflectometer (OTDR), all look the same. Here's why all the splitter output ports would look the same on the OTDR's display:

1. Fiber Loss

2. Balanced Split Ratio

3. No Reflections

1. Fiber Loss: If there is no significant loss of optical power in the splitter or the connected fiber-optic cable, the OTDR will display similar traces for all the splitter output ports. This indicates that the splitter is properly distributing the light signal to all the ports without any major losses.

2. Balanced Split Ratio: A fiber-optic splitter divides the input signal into multiple output signals with equal power distribution. If the splitter is designed and manufactured correctly, it will evenly split the optical power among all the output ports. This balanced split ratio results in similar traces on the OTDR's display for all the splitter output ports.

3. No Reflections: When light travels through a fiber-optic cable and reaches a connection or splice point, some of the light gets reflected back towards the OTDR. These reflections can cause fluctuations or variations in the OTDR traces. However, if there are no reflections occurring at the splitter output ports, the traces on the OTDR's display will appear similar for all the ports.

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Answer:

10amps

Explanation:

Given data

Power =1200W

Voltage =120V

Required

The current I

From

P=IV

I= P/V

Substitute

I=1200/120

I= 10amps

Hence the current is 10amps

Answer:

Do you have a picture of your work?, Maybe i could help with it if you did.

Answer:

Hi, can you send the list of topics? I'd be happy to help you review. Also, did you meet with your instructor to complete the discussion-based assessment?

Explanation: