3.

If A = 5 m/s at 30° and B is 6 m/s at 60°, what segment a - segment b?
-1.3x^ + 2.7y^
7.3x^+7.7y^
7.7x^+7.3y^
2.7x^+0.7y^

The light from the green glow stick held by the Olympic sprinter will appear redshifted.

The phenomenon of redshift occurs when the source of light is moving away from the observer. In this case, as the sprinter is running towards you, the distance between you and the glow stick is decreasing over time. This decrease in distance causes a Doppler shift in the frequency of the light emitted by the glow stick.

Since the light is redshifted, its wavelength increases and the frequency decreases compared to its original emitted frequency. As a result, the light that reaches your eyes appears more towards the red end of the visible spectrum.

It is important to note that the color of the glow stick itself remains the same, but due to the relative motion between the source (the sprinter) and the observer (you), the light undergoes a change in frequency and appears redshifted.

This phenomenon is similar to the redshift observed in cosmology, where the light from distant galaxies appears to be redshifted due to the expansion of the universe.

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Answer:

d= 1.5 g/cm3

Explanation:

datos

m= 30g

v= 20cm3

d=?

formula

d= m / v

solución

d= 30g / 20cm3 = 1.5g/cm3

Explanation:

On a position vs time graph (x vs t), displacement is the difference in positions (Δx = x₂ − x₁).

On a velocity vs time graph (v vs t), displacement is the area under the graph (Δx = ∫ v dt).

In a feedback loop, the stimulus Creates an set point that impacts the original event.

A system component known as a feedback loop is one in which all or a portion of the output is used as input for subsequent operations. A minimum of four stages comprise each feedback loop.

Input is produced in the initial phase. Input is recorded and stored in the subsequent stage. Input is examined in the third stage, and during the fourth, decisions are made using the knowledge from the examination.

Both negative and positive feedback loops are possible. Insofar as they stay within predetermined bounds, negative feedback loops are self-regulating and helpful for maintaining an ideal state. One of the most well-known examples of a self-regulating negative feedback loop is an old-fashioned home thermostat that turns on or off a furnace using bang-bang control.

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An electric flux is a measure of the total electric field passing through a surface. Electric flux may be defined as the amount of electric field that penetrates a given area.

The electric flux, represented by the Greek letter ΦE, is a scalar quantity, and its SI unit is the volt-meter (V m). The larger the area of the sphere, the larger its electric flux. When compared to a smaller sphere, a larger sphere has a greater surface area. This implies that the larger sphere will have a higher electric flux than the smaller sphere. To understand this principle better, let's compare two spherical Gaussian surfaces. Consider two identical charged spheres, one with a radius of r and the other with a radius of 2r. A Gaussian sphere with a radius of r is drawn around the smaller sphere, and a second Gaussian sphere with a radius of 2r is drawn around the larger sphere. The surface area of the smaller sphere is 4πr^2, and the surface area of the larger sphere is 4π(2r)^2, or 16πr^2. The larger sphere, having a larger surface area, will have a larger electric flux than the smaller sphere. The electric flux over the larger sphere is, in fact, four times greater than the electric flux over the smaller sphere.

Thus, in conclusion, a larger spherical Gaussian surface will have a larger electric flux. This is because a larger sphere has a greater surface area than a smaller sphere, allowing for more electric field lines to penetrate the sphere's surface. As a result, it is necessary to use a larger surface area to capture more of the electric field, resulting in a larger electric flux.

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Scientific investigation asks about a cause-and-effect relationship between two variables. Thus, the correct answer is (a).

Scientific investigation is intended to create a hypothesis and demonstrate its validity or lack thereof. Experiments must be conducted in order to test these hypotheses, and these experiments are planned in accordance with the discovery of a cause-and-effect relationship between the two variables under scientific investigation. In these experiments, the "cause" is variable upto various degrees, and the "effect" of the variance is noted. The experimental design, which will try to manipulate the causes to see how these manipulations impact the second variable, will thus be guided by knowledge of the cause-and-effect connection.

Observations are frequently the first step in a scientific investigation.

An observation is something that is discovered using the senses of humans or tools and measurement technologies that support the senses of humans. Important scientific discoveries may result from unintentional observations.

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The principle of moments states that when a body is balanced the total clockwise moment about a point equals the total anticlockwise moment about the same point.Equation.Moment=Force F×perpendicular distance from the pivot do.

The solar wind, with a constant temperature of 1.3x10^5 K and a speed of 450 km/s, is a highly ionized plasma.

The solar wind, which is a stream of charged particles (plasma) emitted by the Sun, exhibits characteristics of a highly ionized plasma. As it travels from the Sun to the Earth, the solar wind encounters variations in temperature, density, pressure, and speed. In this case, with a constant temperature of 1.3x10^5 K and a speed of 450 km/s, the solar wind can be classified as a highly ionized plasma.

During a Coronal Mass Ejection (CME), eruptive phenomena on the Sun's surface cause a sudden release of a large amount of plasma and magnetic fields into space. This disturbance leads to an increase in the temperature of the solar wind to around 10^7 K and an increase in its speed to approximately 10^3 km/s. This enhanced energy and velocity result in a significant disruption of the solar wind's flow, making it a turbulent fluid.

Turbulent fluids are characterized by chaotic and irregular motion, with strong fluctuations and mixing. The increased temperature and speed during a CME generate turbulent behavior within the solar wind, leading to the disruption and mixing of plasma particles along its trajectory.

To determine the type of fluid flow, the Reynolds number (Re) is often used. It relates the flow's characteristics, such as velocity and length, to the fluid's viscosity. In this case, since the solar wind is a plasma and has negligible viscosity, the Reynolds number is extremely high, well above the turbulent threshold of 4000. Therefore, the solar wind with increased temperature and speed due to a CME can be classified as a turbulent fluid.

In summary, the solar wind, with a constant temperature of 1.3x10^5 K and a speed of 450 km/s, is a highly ionized plasma. However, during a Coronal Mass Ejection (CME), the temperature and speed of the solar wind increase significantly, leading to turbulent fluid behavior.

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Answer:

turning

Explanation:

because the moment of a force is for pivots

the moment of a force can be clockwise motion and anti clockwise motion

hope this helps

Daniela had a 5-meter head start and Leonard caught up to her at 25 meters best describes the runners. Option A is correct.

Distance is a numerical representation of the distance between two objects or locations.

The distance can refer to a physical length or an estimate based on other factors in physics or common use. |AB| is a symbol for the distance between two points A and B.

The graph shows that Daniela had a 5-meter head start and Leonard caught up to her at 25 meters

Hence option A is correct.

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Answer:

Daniela had a 5 meter head start, and Leonard caught up to her at 25 meters.

Explanation: took the unit test

The statement "each art movement inspires the next art movement" can be considered true. Art movements often build upon or react to the ideas and styles of preceding movements, which creates a continuous chain of inspiration in art history.

For example, Impressionism emerged as a response to the strict rules of Academic art, and Post-Impressionism then followed, taking inspiration from Impressionism but exploring new techniques and styles. The progression of art movements reflects the evolving interests and concerns of artists and society, as well as the influence of historical events and technological advancements. In this way, one movement can inspire and lead to the emergence of the next.

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Answer:

Option 4: potassium, germanium, selenium

Explanation:

A Selenium atom has 34 electrons and its ground state electron configuration is 1s2, 2s2, 2p6, 3s2, 3p6, 3d10, 4s2, 4p4

This means it has 6 electrons in it's outermost shell.

Germanium :

A Germanium atom has 32 electrons and its ground state electron configuration is 1s2, 2s2, 2p6, 3s2, 3p6, 3d10, 4s2, 4p2. This means it has 4 electrons in it's outermost shell.

Potassium:

A potassium atom has 19 electrons and its electron configuration is; 1s2, 2s2, 2p6, 3s2, 3p6, 4s1. This means it has 1 electron in it's outermost shell.

In reactivity, the element with the most number of electrons in it's outermost shell will be the least conductive.

Thus, the most conductive is potassium followed by Germanium then selenium

Answer:

nitrogen (N), antimony (Sb), bismuth (Bi)

Explanation: just go back on the periodic table. i also got it right on edge.

Migrating bird that can travel at a speed of 30 m/s. It will travel 45 km (45000 m) in 25 minutes at this speed.

It will travel,

45 km (45000 m)

25 minutes is,

1500 seconds

as ,(25*60=1500)

distance is,

(speed*time)

distance=30m/s * 1500s -> 45000 m

-> 45 km

so, migrating bird will travel 45 km (45000 m)

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Answer:

it's D

Explanation:

Equation of power in a electrical circuit is given as:

\( \bf P = I^2R\)

I → Current flowing through the circuit.

R → Resistance of the circuit

We need to calculate power when;

Current (I) = 0.02 A

Resistance (R) = 30 Ω

By substituting values in the equation, we get:

\( \rm \longrightarrow P = (0.02)^2 \times 30 \\ \\ \rm \longrightarrow P = 0.0004 \times 30 \\ \\ \rm \longrightarrow P = 0.012 \: W\)

\( \therefore \) Power in the circuit = 0.012 W

Answer:

D. are made of cell

Explanation:

first , cell simply means the basic and structural unit of life ......All living organisms have cells

It could be Unicellular(amoeba), colonial form ( volvox) , filamentous form(spirogyra) or multicellular .......

(a) The object accelerates from A to B at each time interval. B to C - Zero acceleration Negative direction. D to E—No acceleration. (b)The net force on the object for each time period is: A to B - Forward direction Zero heading B-C C to D—Backward D-E: Zero direction

The above graph shows the velocity versus time graph for an object. To determine the acceleration and direction of the net force, it is essential to determine the slope of the graph. Here, the slope represents the velocity of the object. The acceleration of the object for each of the indicated time intervals can be determined by calculating the slope of the velocity versus time graph. The slope of the graph will give us an idea about the direction of acceleration. The direction of acceleration can be calculated by knowing the direction of velocity and the slope of the graph. Positive acceleration means the object is speeding up, negative acceleration means the object is slowing down, and zero acceleration means that the object is moving at a constant speed. Therefore, the object's acceleration direction for each of the indicated time intervals is A to B - Positive direction, B to C - The acceleration is zero, C to D - Negative direction, and D to E - The acceleration is zero.

The direction of the net force acting on the object for each indicated time interval can be determined by calculating the slope of the graph. The slope of the graph will give us an idea of the direction of the net force. When the acceleration of the object is in the forward direction, it means the net force is also in the forward direction. When the acceleration of the object is in the backward direction, it means the net force is also in the backward direction. When the acceleration of the object is zero, it means that the net force is zero. Therefore, the direction of the net force acting on the object for each indicated time interval is A to B - Forward direction, B to C - Zero direction, C to D - Backward direction, and D to E - Zero direction.

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The current model of the atom is called the electron cloud model or the quantum mechanical mode.

The current model of the atom is called the electron cloud model or the quantum mechanical model. This model describes electrons as existing in a three-dimensional region around the nucleus called the electron cloud, where the electrons are most likely to be found at any given time. This model incorporates principles of quantum mechanics, which recognizes the wave-particle duality of electrons and the probabilistic nature of their behavior, in contrast to the earlier classical models like the planetary model or the plum pudding model.

Therefore, the nuclear model, which describes the atom as consisting of a central nucleus surrounded by electrons, is a precursor to the modern quantum mechanical model.

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Answer:

Before the front of the vehicle enters the intersection.

Explanation:

When stopping at a stop sign where there is no crosswalk or stop line, a driver should stop his/her vehicle before the front of the vehicle enters the intersection.

The front part of the vehicle comes in contact initially. On the other hand, the back part comes after that.

Hence, the correct option is (b).

Answer:

hmmmm

Explanation:

Answer: letter B

Explanation:

As you can see the battery only has one wire connected to it thus not a complete loop

its b trust me man ;oih wrio'weioa'yher

Answer:

13 Hz Ans..

Explanation:

Data:

wavelength = 5 m

v = 65 m\s

f = ?

Formula:

v = f w

f= v\w

Solution:

f = 65 \ 5

f = 13 Hz Ans .........

Answer:

its b

Explanation:

b

The mica thickness will be  24 * \(10^{-6}\) m

Diffraction of light is the phenomena of bending of light around the corner of an obstacle or aperture in the path of light and this light penetrates into the geometrical shadow of the obstacle. Thus, this light deviates from its linear path.

The central maximum is the brightest central portion of the diffraction pattern. The central maximum is the widest and has the maximum intensity.

Fringe width = lambda * D / d

The distance of the screen from the slit = D

The distance between two slits = d

shift = 30 * lambda  * D / d                               equation 1

shift in central maxima = (mu - 1)t D / d            equation 2

equating both the equations

(mu - 1) t D / d  = 30 * lambda  * D / d          

(1.60 - 1) * t    = 30 * 480 * \(10^{-9}\)

t = 24 * \(10^{-6}\) m

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Answer:

thanks me later

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For the designing of differential amplifier following were found out :

the small-signal gain is zero.

the transconductance (gm) and output resistance (ro) of the NMOS transistors are  -640 * (W/L) μA/V and 1 / (8 * (W/L)) kΩ respectively.

the transconductance (gm) and output resistance (ro) of the PMOS transistors are -320 * (W/L) μA/V and  respectively.

NMOS transistor: Wn = 0.03 μm, L = 0.2 μm

PMOS transistor: Wp = 0.0075 μm, L = 0.2 μm

Bias current: Itail = 1 mA

Resistance: R = 0.3 kΩ

To design the differential amplifier according to the given specifications, we will follow these steps:

Step 1: Calculate the small-signal gain (Av)

Step 2: Determine the transconductance (gm) and output resistance (ro) of the NMOS transistors

Step 3: Determine the transconductance (gm) and output resistance (ro) of the PMOS transistors

Step 4: Calculate the tail current (Itail) based on the specified Iss

Step 5: Determine the resistance (R) value

Step 6: Calculate the width (Wp) of the PMOS transistor

Step 7: Calculate the width (Wn) of the NMOS transistors

Now let's go through each step in detail.

Step 1: Calculate the small-signal gain (Av)

Given: Av = 10, VOP = VON = 3.5V

Av = (vop - von) / (vip - vin)

10 = (3.5 - 3.5) / (0.1)

10 = 0 / 0.1

Since the numerator is zero, the small-signal gain is zero.

Step 2: Determine the transconductance (gm) and output resistance (ro) of the NMOS transistors

Given: unCox = 400 μA/V², Vtn = 0.8V, n = 0.02 V^(-1), L = 0.2 μm

gm = 2 * unCox * (W/L) * (Vgs - Vtn)

ro = 1 / (lambda * unCox * (W/L))

We need to design the amplifier for DC operation (Vin = Vbias), where the differential voltage (vgs = Vin - Vbias) should be zero to operate the transistors in the saturation region.

For the NMOS transistors:

Vgs = 0 (since Vin = Vbias)

gm = 2 * unCox * (W/L) * (Vgs - Vtn)

  = 2 * 400 μA/V² * (W/L) * (0 - 0.8)

  = -640 * (W/L) μA/V

ro = 1 / (lambda * unCox * (W/L))

  = 1 / (0.02 V^(-1) * 400 μA/V² * (W/L))

  = 1 / (8 * (W/L)) kΩ

Step 3: Determine the transconductance (gm) and output resistance (ro) of the PMOS transistors

Given: upCox = 200 μA/V², Vtp = -0.8V, p = 0.04 V^(-1), L = 0.2 μm

Similarly, for the PMOS transistors, we need to design the amplifier for DC operation (Vin = Vbias), where the differential voltage (vsg = Vbias - Vin) should be zero to operate the transistors in the saturation region.

For the PMOS transistors:

Vsg = 0 (since Vin = Vbias)

gm = 2 * upCox * (W/L) * (Vtp - Vsg)

  = 2 * 200 μA/V² * (W/L) * (-0.8 - 0)

  = -320 * (W/L) μA/V

ro = 1 / (lambda * upCox * (W/L))

  = 1 / (0.04 V^(-1) * 200 μA/V² *

  = 1 / (5 * (W/L)) kΩ

Step 4: Calculate the tail current (Itail) based on the specified Iss

Given: Iss = 2 mA

Itail = Iss / 2

= 2 mA / 2

= 1 mA

Step 5: Determine the resistance (R) value

Given: Vs = 0.3 V, VDD = 5 V

We can calculate the resistance (R) value using Ohm's Law:

Vs = Itail * R

0.3 V = 1 mA * R

R = 0.3 kΩ

Step 6: Calculate the width (Wp) of the PMOS transistor

To calculate Wp, we'll use the equation for the tail current:

Itail = 2 * upCox * (Wp/L) * (VDD - Vtp)^2

1 mA = 2 * 200 μA/V² * (Wp/0.2 μm) * (5 V + 0.8 V)^2

1 mA = 2 * 200 μA/V² * (Wp/0.2 μm) * (5.8 V)^2

Solving for Wp:

Wp = (1 mA * 0.2 μm) / (2 * 200 μA/V² * (5.8 V)^2)

Wp = 0.01 μm / (2 * 200 μA/V² * 33.64 V^2)

Wp ≈ 0.0075 μm

Step 7: Calculate the width (Wn) of the NMOS transistors

Given: Wn = 4 * Wp

Wn = 4 * 0.0075 μm

Wn = 0.03 μm

So, the design parameters for the differential amplifier are as follows:

the small-signal gain is zero.

the transconductance (gm) and output resistance (ro) of the NMOS transistors are  -640 * (W/L) μA/V and 1 / (8 * (W/L)) kΩ respectively.

the transconductance (gm) and output resistance (ro) of the PMOS transistors are -320 * (W/L) μA/V and  respectively.

NMOS transistor: Wn = 0.03 μm, L = 0.2 μm

PMOS transistor: Wp = 0.0075 μm, L = 0.2 μm

Bias current: Itail = 1 mA

Resistance: R = 0.3 kΩ

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This refers to an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. the buoyant force is also known as upthrust. It operates under Archimedes' principle.

The formula for calculating  buoyant force:

Fb = -ρ g V

Where,

Fb = buoyant force

ρ = fluid density

g = acceleration due to gravity

V = fluid volume

From the question:

V = 69.6 l

m = 72.8 kg

g = 9.8m/s

To calculate density, ρ:

ρ = Mass/Volume

ρ = 72.8 kg/69.6 l

ρ = 1.05kg/l

To calculate buoyant force, Fb:

Fb = -ρ g V

Fb = -1.05kg/l * 9.8m/s * 69.6 l

Fb = -716.2 N

Note: Negative buoyancy suggests that the immersed object is denser than the fluid displaced which results in the sinking of the object. Neutral buoyancy takes place when the weight of the immersed object is equivalent to the fluid displaced. The dive taken by the scuba diver is a perfect example of neutral buoyancy.

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The smaller the Ka value, the weaker the acid and the less it ionizes in solution.

The extent of ionization of a weak acid is quantified by the acid ionization constant (Ka). This means that the equilibrium between the acid and its conjugate base lies further to the left, with more undissociated acid present in solution.

Conversely, a larger Ka value indicates a stronger acid with greater ionization in solution, and a larger proportion of the acid molecules will have dissociated into ions.

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