A simple, direct-current electrical circuit is shown below.
Which of the following does the arrow in the circuit represent?

A
the difference in electric potential

B
the resistance to current flow

C
the direction of current flow

D
the direction of electron flow

A wedge is a machine and it is used for separating bodies.

The wedge is a combination of two inclined planes. When the wedge is driven into a body by an effort force, a much larger force will be exerted to each side by the wedge surfaces.

What are the importance of wedge?

A wedge is used to separate bodies which are held together by large forces example of this scenario is splitting of timber. A wedge is a machine and the example of wedge - type of machine are;

Note that a thin wedge has a higher mechanical advantage than a short thick one.

Therefore, a wedge is a machine and it is used for separating bodies.

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The noon solar zenith angle is 55.5°.

Zenith Angle = latitude where you are at ± subsolar point

If the subsolar point and your latitude are in the same hemisphere, subtract.

If the subsolar point and your latitude are in different hemispheres, add.

In this case you are in north latitude and the winter solstice in south latitude. So according to the formula,

Zenith Angle = latitude where you are at + subsolar point

⇒Zenith Angle = 32°+23.5°

⇒Zenith Angle =55.5°

Hence, the noon solar zenith angle for this case is 55.5°.

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Answer:

Human beings can see "visible" light.

Visible light is considered to be between 4000-7000 Angstroms or

400-700 millimicrons

1 Angstron = 1E-10 m

1 Millimicron = 10 Angstroms

The magnitude of the force experienced by a 1. 0 c charge placed at the location of the test charge is 4.5*10^8N.

To find the answer, we have to know more about the force experienced between two charges.

                [tex]Q_1=5C\\Q_2=1C\\r=10m.[/tex]

               [tex]F=\frac{kQ_1Q_2}{r^2}[/tex]

where, k=8.99*10^9.

          [tex]F=\frac{8.99*10^9*5*1}{10^2} =4.5*10^8N[/tex]

Thus, we can conclude that, the magnitude of the force experienced by a 1. 0 c charge placed at the location of the test charge is 4.5*10^8N.

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Answer:

D

Explanation:

I would say much too small as there is a significant portion of the plant that is UNDER water.....

    (  Really depends on how deep the water is...if it is shallow water it would be just a little too small)

Answer:

c. a bicycle locked to a bike rack

Answer: Option (C). A bicycle locked to a bike rack.

At time [tex]t[/tex] seconds, the mass has angular speed

[tex]\omega = \left(3.31\dfrac{\rm rad}{\mathrm s^2}\right) t[/tex]

and hence linear speed

[tex]v = (1.4\,\mathrm m) \omega = (1.4\,\mathrm m) \left(3.31\dfrac{\rm rad}{\mathrm s^2}\right) t[/tex]

After 8 s, its linear speed is

[tex]v = (1.4\,\mathrm m) \left(3.31\dfrac{\rm rad}{\mathrm s^2}\right) (8\,\mathrm s) = 37.072 \dfrac{\rm m}{\rm s} \approx 37 \dfrac{\rm m}{\rm s}[/tex]

and has centripetal acceleration with magnitude

[tex]a = \dfrac{v^2}{1.4\,\rm m} \approx 981.667\dfrac{\rm m}{\mathrm s^2} \approx 980 \dfrac{\rm m}{\mathrm s^2}[/tex]

To maintain this linear speed, by Newton's second law the required centripetal force should have magnitude

[tex]F = (0.34\,\mathrm{kg}) a \approx 333.767\,\mathrm N \approx \boxed{330 \,\mathrm N}[/tex]

Infrared rays, radio waves, and x-rays are the three kinds of light that are invisible to human vision.

The region of the electromagnetic spectrum that the human eye can see is known as the visible light spectrum. This group of wavelengths is most commonly referred to as visible light. The range of wavelengths that the human eye can typically see is from 380 to 700 nanometers.

Example of visible spectrum is visible light.

Examples of invisible light are;

Thus, the three forms of light that are invisible light or invisible to human eyes are Infrared rays, Radio waves and x - rays.

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Are there components of the velocity that are not determined by the measurement of the force?. Yes

Due to the possibility of velocities pointing diagonally, two-dimensional motion is more complicated than one-dimensional motion. A baseball, for instance, could be going diagonally while also moving both horizontally and vertically. To make our calculations simpler, we divide the velocity vector of the baseball into two independent horizontal start subscript and end subscript directions.

It is challenging to attempt to solve for both the horizontal and vertical directions of a baseball in a single equation; it is preferable to use a divide-and-conquer strategy.

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Answer:

Kinetic energy doubles

Answer:

wattage and time used

Explanation:

Look

If a electrical appliance has more power or wattage it will use more energy and cost more

If a electrical appliance is used for more time the cost is more

Hence Option C is correct

Answer:

distance and the amount of the force

Explanation:

moment = f x d

Lighter molecules move fast and escape from the upper atmosphere relatively quickly.

To find the answer, we have to know more about the lighter isotopes.

Thus, we can conclude that, lighter molecules move fast and escape from the upper atmosphere relatively quickly.

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The first three harmonics of the string are 131.8 Hz, 263.6 Hz and 395.4 Hz.

The velocity of the wave is calculated as follows;

v = √T/μ

where;

v = √(50/0.002)

v = 158.1 m/s

f₀ = v/λ

where;

f₀ = v/2L

f₀ = 158.1/(2 x 0.6)

f₀ = 131.8 Hz

f₁ = 2f₀

f₁ = 2(131.8 Hz)

f₁ = 263.6 Hz

f₂ = 3f₀

f₂ = 3(131.8 Hz)

f₂ = 395.4 Hz

Thus, the first three harmonics of the string are 131.8 Hz, 263.6 Hz and 395.4 Hz.

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When energy is transferred between earth's system, some energy is lost to the surroundings in the form of

-light

-movement

-heat

-vibration

Only a few factors account for the majority of the energy in the Earth system: solar energy, gravity, radioactive decay, and the rotation of the Earth. Many surface processes, including winds, currents, the hydrologic cycle, and the entire climate system, are powered by solar energy. Rivers and other materials flow downhill due to gravity, which also causes tides (due to the Moon's gravitational pull). The Earth's interior is heated by radioactive decay, while air and water currents are influenced by the forces of rotation.

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When current flow tries to decrease in an inductor, the magnetic field collapses and the voltage polarity across the inductor reverses

The associated magnetic flux also decreases, it then induces an e m f across the inductor, the sense of which is to assist the decreasing current.

Faraday's law of induction (to distinguish it from his laws of electrolysis), states that the magnitude of the emf induced in a circuit is proportional to the rate of change with time t of the magnetic flux Φ that cuts across the circuit:

emf = −dΦ/dt

Lenz's law, in electromagnetism, statement that an induced electric current flows in a direction such that the current opposes the change that induced it.

When the current flowing through the coil changes, the time-varying magnetic field induces an electromotive force (e.m.f) in the conductor, described by Faraday's law of induction.

According to Lenz's law, the induced voltage has a polarity (direction) which opposes the change in current that created it. As a result, inductors oppose any changes in current through them. Hence , polarity across the inductor got reversed

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Answer:

D.  Sound

Explanation:

Waves: one of the ways that energy may be transferred. Waves can be described as oscillations.

Electromagnetic (EM) waves are transverse waves.

EM waves can be separated into seven groups in the spectrum.  From long wavelength to short wavelength:

Sound waves are longitudinal waves.

The direction of oscillations is different between longitudinal and transverse waves:

Answer:

Sound

Explanation:

EN waves are known as electromagnetic waves

They are divided into seven parts

We can only watch Visible light not others .

Sound is not transverse wave

Surface area and Mass

When a leaf falls, it is being accelerated by gravity to the ground but opposed by air resistance also the drag. The net force on a leaf will therefore be calculated by subtracting its weight of the leaf from its drag.

Air exerts a force known as air resistance. When an object is travelling through the air, the force works in the opposite direction.

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The bug has the greater acceleration because it has the smaller mass

The bug has a greater change in velocity (acceleration) due to experiencing equal force as a much smaller mass.

The rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.

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A thermometer visualization is often used to represent progress towards a goal, target, or limit.

A thermometer typically a vertical bar or column that resembles a thermometer, with a scale indicating the range of values.

As you mentioned, you are considering replacing a gauge with a thermometer for your visualizations.

The values that you would have when using a thermometer visualization would include:

Current Value: This is the data point you are tracking or measuring. It could be anything that you want to represent visually, such as sales, progress, temperature, etc.

Target or Goal: The value you are aiming to achieve. This represents the desired end point of your progress or measurement.

Maximum Value: The upper limit of the thermometer's scale. This could represent the maximum value that is possible or feasible for your data.

Minimum Value: The lower limit of the thermometer's scale. This sets the starting point for your visualization.

Scale Increments: The divisions on the thermometer that indicate different levels of progress. These could be marked with specific values or simply represent proportional divisions.

Units: The units in which your data is measured. For example, if you're tracking sales, the units could be dollars, while for temperature, it could be degrees Celsius or Fahrenheit.

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(a) The distance From A to B to M to N is 22 m, the displacement is 22 m, the speed is 4.4 m/s and the average velocity is 4.4 m/s.

(b) The distance From C to A to G to D is 24 m, the displacement is 2 m, the speed is 4.8 m/s and the average velocity is 0.4 m/s.

(c) The distance From J to I to E to H is 16 m, the displacement is -2 m, the speed is 3.2 m/s and the average velocity is -0.4 m/s.

(d) The distance From F to B to K to F is 32 m, the displacement is 0 m, the speed is 6.4 m/s and the average velocity is 0 m/s.

The distance traveled by the object is calculated as follows;

Distance From A to B to M to N

From A to B to M to N = 3 + 18 + 1 = 22

Distance From C to A to G to D

= 5 + 13 + 6

= 24

Distance From J to I to E to H

= 1 + 8 + 7

= 16

Distance from F to B to K to F

= 8 + 16 + 8

= 32

The displacement of the object is calculated as follows;

displacement = final position - initial position

Displacement From A to B to M to N

= 11 - (-11)

= 22

Displacement from C to A to G to D

= D - C

= - 4 - (-6)

= 2

Displacement from J to I to E to H

= H - J

= 5 - 7

= - 2

Displacement From F to B to K to F

= F - F

= 0

The speed of the object is calculated as follows;

speed = total distance/total time

Speed of the object from A to B to M to N

= 22/5 = 4.4 m/s

Speed of the object from C to A to G to D

= 24/5

= 4.8 m/s

Speed of the object from J to I to E to H

= 16/5

= 3.2 m/s

Speed of the object from F to B to K to F

= 32/5

= 6.4 m/s

The average velocity of the object is calculated as follows;

Average velocity from A to B to M to N

= 22/5

= 4.4 m/s

Average velocity of the object from C to A to G to D

= 2/5

= 0.4 m/s

Average velocity of the object from J to I to E to H

= -2/5

= -0.4 m/s

Average velocity of the object from F to B to K to F

= 0

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The relationship between acceleration and time a(t) for the model rocket v(t)=αt³ + βt + γ, where α=−3. 0m/s4, β=36m/s2, and γ=1. 0m/s is a(t) = -9t² + 36 m/s²

The differentiation of velocity with respect to time gives acceleration.

Velocity of a rocket model is the speed acquired of the body in a particular direction.

Acceleration of the body is the change in velocity with respect to time.

v(t)=αt³ + βt + γ

On differentiating,

a = 3αt² + β

Given, α=−3. 0m/s⁴

           β=36m/s²

            γ=1. 0m/s

On subsituting,

                 a = 3(-3)t² + 36 m/s²

Hence, relationship between acceleration and time a(t) = -9t² + 36 m/s²

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The speed of an observer be if a red (4. 688 × 1014 hz) traffic light appeared green (5. 555 × 1014 hz) to the observer is 0.185v using doppler effect

Utilize the approximation of the Doppler shift formula, (delta f)/f = V/c, for V/c 1 to determine which V on the list is closest. It's a little trickier to calculate the precise Doppler shift formula for light. Use what you are aware of. It is often exclusively covered in relativity theory classes. The formula for the Doppler shift of sound heard by a moving observer is NOT the same.

5.551*107 m/s = (Delta f)/f = 0.185 V.

Doppler radar transmits energy in pulses and detects any signal that is returned. The "Doppler shift" seen with sound waves is comparable to the phase shift effect. Due to compression (a change in phase) of sound waves, the "Doppler shift" causes the sound pitch of an item traveling toward you to be higher.

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Answer:

The independent variable is the cause. Its value is independent of other variables in your study. The dependent variable is the effect. Its value depends on changes in the independent variable.

hope this helps you

The possible reasons why there is no planet between mars and Jupiter are the asteroid belt. But near the asteroid belt, a moon of mars is near with a big asteroid.

The asteroid belt is one of the proposed explanations for that there is no planet between Mars and Jupiter. However, a Mars moon is close to a large asteroid near the asteroid belt.

The asteroid belt is defined as a torus-shaped area in the Solar System lying roughly between Jupiter and Mars' orbits. It is home to a large number of solid, irregularly shaped things of various sizes, but far smaller than planets, known as asteroids or minor planets.

The asteroid belt is significant because it is the source of the majority of asteroids that pass close to Earth and constitute a possible threat to life on the planet, particularly human constructions.

Therefore, One of the possible theories for the lack of a planet between Mars and Jupiter is the asteroid belt.

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The maximum frictional force in the knee joint of a person who supports 76. 0 kg of her mass on that knee 119.28N.

Given,

m=76kg, μ=0.16, g=9.81 m/[tex]s^{2}[/tex]

frictional force = mμg= 76*0.16*9.81= 119.28 N

An opposing force to the relative motion of two bodies in contact is known as frictional force. Always acting in the opposite direction from the direction of motion, frictional force is applied to a moving body. Because it resists motion, it aids in lowering the moving object's speed. The force is one of touch. Four broad categories can be made for the force of friction depending on the sort of motion that occurs between the two objects. Static friction is the force of friction between an object and the surface it is put on.

What is the maximum frictional force in the knee joint of a person who supports 76. 0 kg of her mass on that knee?

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Answer:

The forces could be gravity, friction between the car and the ground, the force Katie is applying and the normal reaction.

The mathematical relationship between wavelength and energy transmission E = hv.

A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in the consecutive cycles. This length is often defined in wireless systems in metres (m), centimetres (cm), or millimetres (mm) (mm). The wavelength is most frequently described in nanometers (nm), which are units of 10⁻⁹ m, or angstroms (Å), which are units of 10⁻¹⁰ m, for infrared (IR), visible light (UV), and gamma radiation (γ).

The most fundamental aspect of global energy integration is energy transmission. With the flow of electricity produced from coal as well as from hydro, nuclear, wind, and solar energy all being transported through power networks, electric energy transmission is a significant source of energy transport.

Wavelength and frequency are connected to energy in the same way as they are to light. Greater energy is correlated with shorter wavelengths and higher frequencies. Therefore, lower energy is produced by longer wavelengths and lower frequencies. E = hv is the energy equation.

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A(n) closed system is one in which energy moves freely in and out, but no matter enters or leaves the system.

You can have an open or closed system: A system that is totally cut off from its surroundings is referred to as a closed system. We have opted to adopt this definition because it is one that is frequently used in the system literature.

A closed system is one that only permits the transfer of energy within or outside the system but not the transport of matter. For instance, a beaker of evaporating water with a closed top permits the flow of energy to the environment but prevents the evaporation of (matter) water.

closed systems are also referred to as systems that don't allow anything other than energy to enter or exit. A closed water bottle functions as a closed system in this instance.

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