what is refractive index ? ​

Answer:

hey!!

Newton's second law of motion, also known as the law of acceleration, explains the relationship between an object's mass, the applied force, and its resulting acceleration. The law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Mathematically, Newton's second law can be expressed as:

F = ma

Where:

F represents the net force acting on the object,

m represents the mass of the object, and

a represents the acceleration produced by the force.

In simpler terms, Newton's second law states that the force acting on an object determines how much it accelerates. A larger force applied to an object will result in a greater acceleration, while a smaller force will produce a smaller acceleration. Additionally, if the mass of the object is increased, the same force will produce a smaller acceleration, and vice versa.

This fundamental law of motion helps us understand how forces and masses interact to produce motion. It is widely applicable and plays a crucial role in fields such as physics, engineering, and everyday life when studying the behaviour of objects in motion.

i hope this helps you :)

Answer:

The velocity of the cross-wind was 375 km/hr South

Explanation:

The given speed of the airplane, v₀ = 500.0 km/hr W

The direction the airplane is headed = West

The direction of the wind encountered = Southbound wind

The final velocity of the airplane, R = 625 km/hr

The final direction of the airplane = South West SW

Let vₐ represent the velocity of the cross-wind

Therefore, we have the given velocities in vector form as follows;

R = -500.0·i - vₐ·j

Also, we have;

\(\left | R \right | = 625 = \sqrt{v_0^2 + v_a^2} = \sqrt{(-500)^2 + (-v_a)^2}\)

625² = (-500)² + (-vₐ)²

(-vₐ)² = 625² - (-500)² = 140625

-vₐ = 375

vₐ = -375 km/hr North = 375 km/hr South

The velocity of the cross-wind = vₐ = 375 km/hr South

If a motor car is traveling at a steady speed of 30m/s then the work done by the car each second against the force of air resistance is 48,000 J.

To calculate the work done by the car each second against the force of air resistance, we need to use the formula for work, which is:

work = force x distance

In this case, the distance is not given, but we know that the car is traveling at a steady speed of 30m/s. We can use this information to calculate the distance traveled in one second:

distance = speed x time
distance = 30m/s x 1s
distance = 30m

Now we can calculate the work done by the car against the force of air resistance:

work = force x distance
work = 1600N x 30m
work = 48,000 J

Therefore, the work done by the car each second against the force of air resistance is 48,000 J.

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Answer:

Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.

Explanation:

Answer:

Speed refers to the distance taken at a specific time interval. Velocity is the speed in a certain direction.

B. Vesicle does NOT describe a structural feature of a volcano.

A vent, fissure, and magma chamber are all structural features, while a vesicle refers to a small cavity in volcanic rock, formed by trapped gas bubbles during the solidification of lava. A vent is an opening in the Earth's surface that allows volcanic material to escape. A fissure is a large crack in the Earth's surface that allows lava to flow. A magma chamber is a large underground reservoir containing molten rock. A vesicle is an air pocket inside rocks formed by the expansion of gases during volcanic eruptions.

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Answer:

6m/s²

Explanation:

Given parameters:

Initial velocity  = 4m/s

Time  = 3s

Final velocity  = 22m/s

Unknown:

Average acceleration  = ?

Solution:

Acceleration is the rate of change of velocity with time taken.

    Acceleration  = \(\frac{Final velocity - Initial velocity }{Time}\)  

Acceleration  = \(\frac{22 - 4}{3}\)    = 6m/s²

When comparing and contrasting how sound is heard by a person observing a moving car versus a person moving with the car, the primary difference lies in the Doppler effect, this occurs when the source of sound is moving relative to the observer and the sound intensity.

For the person observing the moving car, the pitch of the sound will change due to the car's motion. As the car approaches the observer, the sound waves compress, resulting in a higher pitch. Conversely, as the car moves away, the sound waves expand, leading to a lower pitch. In contrast, for the person moving with the car, the sound remains constant because the relative motion between the sound source and the observer is the same, this individual will not experience the Doppler effect and will hear the car's sound at its original pitch.

Furthermore, the observer at rest may experience varying sound intensity due to the car's changing distance. On the other hand, the person moving with the car will have a relatively consistent sound intensity, as their distance from the sound source remains constant. Overall, the Doppler effect and sound intensity are the key factors that differentiate the auditory experience between these two scenarios.

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Explanation:

Equivalent Resistance of R1 and R2 in parallel

= R1 * R2 / R1 + R2

= 1800 / 90

= 20 Ohms

Ammeter measures current flowing through the circuit :

V = I * R

I = V / R

I = 9 / 20

I = 0.45 A

Its a Conduction NO FOR REAL ITS A

Answer:

c, convection

Explanation:

edge 2020

Answer:

1875 j

Explanation:

f * d = work

your AVERAGE force is (210+ 40)/2 = 125 N

125 * 15 = 1875 j

The work done during this period will be 1875 J.. if the body is displaced in the same direction of the force it will be positive.

Work done is defined as the product of applied force and the distance through which the body is displaced on which the force is applied.

Work may be zero, positive and negative.it depends on the direction of the body displaced

The given data in the problem is;

F is the average force applied by the worker

d is the displacement = 15 m

The average force is ;

\(\rm F_{AVG} = \frac{F_1+F_2}{2} \\\\ F_{AVG} = \frac{210+40}{2} \\\\ F_{AVG}=125 \ J\)

The work done by the worker will be;

\(\rm W= Fd \\\\\rm W= F_{AVG}d \\\\W= 125 \times 15 \\\\ \rm W=1875 \ J\)

Hence the work done during this period will be 1875 J.

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Answer:

Gravity

Explanation:

It is gravity because the sun's gravity pulls all the planets towards itself and keeps the planets in the sun's orbit

The object with the greatest inertia is 8 kg bowling ball.

option A is the correct answer.

Newton's first law of motion states that a body at rest or uniform motion in a straight line will continue in that form unless it is acted upon by an external force.

Newton's first law of motion is also called the law of inertia because it depends on the mass of the object.

The inertia of a body or an object is the measure of the reluctance of the body or object to start moving when it is at rest or to to stop moving when it is in motion.

The inertia of an object depends on the mass of the object, thus the greater the mass of an object the greater the inertia of the object and vice versa.

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Answer:

While self-gravity pulls the star inward and tries to make it collapse, thermal pressure (heat created by fusion) pushes outward. These two forces cancel each other out in a main sequence star, thus making it stable.

Explanation:

The defining characteristic of Trojan asteroids is their location in space. They are asteroids that share the orbit of a planet, leading or following the planet in its path around the sun. Specifically, Trojan asteroids are located in stable points known as Lagrange points, which are positions in space where the gravitational forces of two large objects, such as a planet and the sun, are balanced by the centripetal force of a smaller object.

Trojan asteroids are named after the mythical Trojan Horse from the Trojan War, because their discovery in the late 19th century was seen as a "hidden" population of asteroids that were difficult to detect due to their location in the same orbit as Jupiter. Today, Trojan asteroids have been found associated with several planets in the Solar System, including Mars, Neptune, and even Earth.

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Answer:

to be balanced moments should be equal

4m

Explanation:

\(fd = fd \\ 600 \times 2 = 300 \times x \\ \frac{600 \times 2}{300} = x \\ 4m\)

Answer:

4m

Explanation:

fd=fd

600×2× x

300

4m ans

Answer:

Explanation:

As a pendulum swings, its potential energy converts to kinetic and back to potential. ... During the course of a swing from left to right, potential energy is converted into kinetic energy and back.

Answer:

Once the weighted end of the pendulum is released, it will become active as gravity pulls it downwards. Potential Energy Is Converted To Kinetic Energy. which is the energy exerted by a moving object. An active pendulum has the most kinetic energy at the lowest point of it's swing when the weight is movin.

HOPE THIS HELPS!!

a. The combined acceleration gtot at distance rh from the planet in a circular orbit around the star with radius r is given by gtot = -(GM/r^2)rh + (Gm/r^2)(r - rh) + (v^2/rh), where G is the gravitational constant, M is the mass of the star, m is the mass of the planet, and v is the orbital velocity of the planet.

b. Setting gtot = 0 and solving for ry, the Hill radius is approximately given by ry = r[(m/3M)^(1/3)]. This approximation assumes that m << M and that the orbit of the planet is circular. The Hill radius is the maximum distance from the planet where its gravity dominates over the star's gravity and where objects can be stably bound to the planet.

To calculate the combined acceleration, we must consider the gravitational forces of both the star and the planet on an orbiting test mass at distance rh from the planet.

The centrifugal acceleration is also included as it must be balanced by the gravitational forces. Setting gtot to zero and solving for ry involves algebraic manipulation and the use of the approximation that m << M and the orbit is circular.

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Answer:

The applied force on the vehicle is 5,000 N

Explanation:

From the question, we have the following parameters of the motion of the vehicle;

The form of the velocity with which the vehicle is travelling = Uniform velocity

The direction of motion of the vehicle = Along a straight and level stretch of the highway

The combined force which acts as resistance to the vehicle's motion = 5,000 N from rolling friction and resistance of the air opposite to the direction of motion

A vehicle travelling with uniform velocity has zero acceleration, therefore;

The acceleration of the vehicle, a = 0 m/s²

According to Newton's Second Law of Motion, we have;

Force, F = Mass, m × Acceleration, a

∴ The net force of acting on the vehicle, F = m × a

Where;

m = The mass of the vehicle

a = The acceleration of the vehicle = 0 m/s²

∴ F = m × 0 = 0

The net force on the vehicle = 0, therefore;

The applied force + The force of rolling friction and air resistance = 0

We therefore have;

The applied force + 5,000 N = 0

∴ The applied force = 0 - 5,000 N = -5,000 N

The applied force, F = 5,000 N in the direction of motion.

Answer:

\(4 ms^{-2}\)

Explanation:

Normal force - should be the reaction from the surface it's on - nullifies the weight of the object. At this point the only force is of \(22-14 = 8N\) from whoever is pushing the square and the friction, towards the right. At this point we divide the force by the mass of the object to obtain an acceleration of \(8/2 = 4 ms^{-2}\)

The kinetic energy of the bat which strikes the ball with the force of 2 x 10⁴ N is a) 1.0 x 10² J

The force at which the bat strikes the ball = 2 x 10⁴ N

The distance traveled by the ball = 5 x 10⁻³ m

The work done by the bat is the kinetic energy of the bat. Thus, the formula to find the kinetic energy of the bat is

                    K.E = F x d

where K.E is the kinetic energy of the bat

              F is the force of the bat

              d is the distance traveled by the ball.

Let us substitute the known values in the above equation, we get

                   K.E = 2 x 10⁴ x 5 x 10⁻³

                         = 10 x 10

                         = 1.0 x 10² J

Therefore, the kinetic energy of the bat is 1.0 x 10² J

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For the transition from solid to liquid, ΔH is positive (endothermic process), so V₂ - V₁ must be negative (liquid water is more dense than ice). As a result, liquid water has a density that is higher than ice.

a) From the definition of the Gibbs free energy, we have:

dG = -S dT + V dP

At coexistence, we have G(P,T) = G(P,T).

∂G/∂T|P = ∂G/∂T|P

(∂G/∂P|T) (dP/dT) = - (∂G/∂T|P)

At coexistence, the two phases have the same Gibbs free energy, so we can write:

(∂G/∂P|T) (dP/dT) = - (∂G/∂T|P) = S

Rearranging, we get:

dP/dT = - (S / (∂G/∂P|T))

b) From the definition of the latent heat of a phase transition, we have:

ΔH = TΔS - PΔV

At coexistence, we have ΔG = 0, so ΔG = ΔH - TΔS = 0. Solving for ΔS, we get:

ΔS = ΔH / T

Using the Maxwell relation (∂S/∂P)_T = (∂V/∂T)_P, we can write:

(∂G/∂P|T) = - S / (∂S/∂P|T) = - V / (∂V/∂T|P)

Substituting these expressions into the result from part a), we get:

dP/dT = (ΔH / T) / (V₂ - V₁)

where V₁ and V₂ are the volumes of phases and 2, respectively.

c) Assuming the gas phase is an ideal gas, we can write:

PV = nRT

Taking the derivative of both sides with respect to T at constant P, we get:

V dP/dT + P = nR/ P

Solving for dP/dT, we get:

dP/dT = (nP/ V²) [(∂V/∂T)_P - (R/V)]

At coexistence, we have ΔG = 0, so ΔG = ΔH - TΔS = 0. Solving for ΔH and using the relation ΔV ≈ V₂ - V₁ = V₂ (since the gas volume is much greater than the liquid volume), we get:

ΔH = TΔS = TΔ(V₂ - V₁) ≈ TV₂ΔV

Substituting this expression and the ideal gas law into the result from part c), we get:

dP/dT = nR/V₂

d) From the result in part b), we have:

dP/dT = (ΔH / T) / (V₂ - V₁)

Since the coexistence line has a negative slope, dP/dT is negative. Therefore, ΔH and V₂ - V₁ must have opposite signs.

An endothermic process is a chemical or physical change that absorbs heat from its surroundings. An endothermic process involves a system gaining energy from its surroundings, which lowers the ambient temperature. This process is the opposite of an exothermic reaction, which releases energy in the form of heat.

One common example of an endothermic process is the melting of ice. When heat is applied to ice, the ice absorbs the energy and begins to melt, but the temperature of the surroundings does not increase. Instead, the heat energy is absorbed by the ice, causing its molecules to move faster and eventually break free from their solid structure. Endothermic processes are also used in many industrial applications, such as refrigeration and air conditioning.

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The equations mentioned by Emily in the valuation analysis for Aspeon are as follows:

1) Equation (1): This equation represents the value of equity (S) and calculates it based on the EBIT (earnings before interest and taxes), the tax shield provided by debt (D), and the required return on debt (kd) and equity (ks). It implies that the value of equity is equal to the adjusted EBIT after deducting the tax shield from debt.

2) Equation (2): This equation calculates the total enterprise value (V) by adding the value of equity (S) and debt (D). It represents the total worth of the company, considering both equity and debt.

3) Equation (3): This equation calculates the price per share (P) by dividing the total enterprise value (V) minus the initial debt (D0) by the number of shares (n0). It represents the price per share based on the valuation of the company.

4) Equation (4): This equation calculates the new number of shares (n1) by subtracting the dividend (D) from the initial number of shares (n0) divided by the price per share (P). It represents the adjusted number of shares after the payment of dividends.

5) Equation (5): This equation calculates the levered value (VL) by adding the unlevered value (VU) with the tax shield value (TD). It represents the value of the company after considering the tax advantages of debt.

These equations provide a framework for valuation analysis, considering factors such as earnings, taxes, debt, and equity. They help assess the value and financial implications of Aspeon's growth prospects.

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Answer:

because pennies are made from copper

Explanation:

Answer:

Explanation:

given :-

force applied = 117.6N

Area = 20 m^2

Pressure =?

solution:-

Pressure = Force / Area

= 117.6 N / 20 m^2

= 5.88 Pascals

Hope it helps :D!

Explanation:

The acceleration of the bead in the viscous liquid at terminal speed is zero, from which the value of the constant b, can be determined.

Reasons:

The mass of the bead, m = 3.00 g

Time at which the mass is released, t = 0

Terminal velocity of \(v_T\) = 2.00 cm/s = 0.02 m/s

(a) The equation 6.2, obtained online is presented as follows;

\(\overrightarrow R = -b \cdot \overrightarrow v\)

Where;

\(\overrightarrow R\) = The resistive force = m·a

\(\overrightarrow v\) = The relative velocity of the object

a = The acceleration of the object

We get;

m·g - b·v = m·a

At the terminal velocity, \(v_T\), we have;

a = 0

Therefore;

m·g - b·\(v_T\) = m × a = 0

m·g = b·\(v_T\)

\(b= \dfrac{m \cdot g}{v_T}\)

Therefore;

\(b= \dfrac{0.003 \, kg \times 9.81 \, m/s^2}{0.02 \, m/s} = 1.4715 \, kg/s\)

b = 1.4715 kg/s.

(b) From, m·g - b·v = m·a, and \(a = \dfrac{dv}{dt}\), we have;

\(m \cdot \dfrac{dv}{dt}= m \cdot g - b\cdot v\)

Which gives;

\(\right. \dfrac{dv}{dt}= \mathbf{g - \dfrac{b}{m} \cdot v}\)

The expression for v obtained by differential equation is expressed as follows;

\(v = \dfrac{m \cdot g}{b} \cdot \left(1 - e^{-b \cdot t/m} \right)\)

Which gives;

\(v = \mathbf{v_T \cdot \left(1 - e^{-b \cdot t/m} \right)}\)

Therefore, when the bead reaches 0.632·\(v_T\), we get;

\(1 - e^{-b \cdot t/m}\) = 0.632

\(e^{-b \cdot t/m}\) = 1 - 0.632 = 0.368

\(t= \dfrac{ln(0.368)}{-\dfrac{1.4715}{0.003} } \approx 2.038 \times 10^{-3}\)

The time at which the bead reaches  0.632·\(v_T\), t ≈ 2.038 × 10⁻³ s.

(c) The value of the resistive force at terminal velocity, \(v_T\), is \(\overrightarrow F_R = -b \cdot v_T\)

Which gives;

\(\overrightarrow F_R\) = 1.4715 kg/s × 0.02 m/s = 0.02943 N.

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Barium have 2 valence electrons.

Neon is a noble gas with 8 valence electrons

Carbon and silicon both have same valence electrons that is 4...

Hope it helps you to not get lost lol

Answer: silicon and carbon

Explanation:

barium has 2 valance electronsNeon has 8 valence electronsSilicon has 4 valence electronsCarbon has 4 valence electrons

Signals generated by transducers are normally of the order of microvolts to millivolts.

What are transducers?

Transducers are electrical components that transform energy from one form into another. They are electrical sensors that generate an electrical signal based on the quantity being assessed.

A transducer is a device that transforms a physical quantity such as force, pressure, or temperature into an electrical signal. This electrical signal can then be amplified, filtered, or measured in other ways.

Some common examples of transducers include microphones, strain gauges, accelerometers, and thermocouples.

What are the signals generated by transducers?

The signals generated by transducers are normally of the order of microvolts to millivolts. The magnitude of the signal generated depends on the quantity being assessed, as well as the type and sensitivity of the transducer.

In order to use the signal generated by a transducer, it is usually necessary to amplify and filter the signal to remove noise and unwanted frequencies. This can be done using an amplifier or other signal processing equipment.

Overall, the signals generated by transducers are a crucial part of many electronic systems and are used in a wide variety of applications.

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Answer:

they are both curved surfaces

Explanation:

Answer:

The net force exerted on the race-car driver is 727.3 N

Explanation:

Acceleration

According to Newton's second law of motion, the acceleration of an object a is directly proportional to the net force F and inversely proportional to the object's mass m:

\(F=m.a\)

Since we don't have the value of the acceleration, we must use the kinematic equations to calculate it.

The main formula for accelerated motion is:

\(v_f=v_o+a.t\)

Where vf is the final speed of the object, vo is its initial speed, a is the acceleration, and t is the time.

The race-car driver accelerates from vo=0 to 50 m/s in t=5.5 s. We can calculate the acceleration, solving the above equation for a:

\(\displaystyle a=\frac{v_f-v_o}{t}\)

\(\displaystyle a=\frac{50-0}{5.5}\)

\(a=9.09\ m/s^2\)

Now we calculate the net force:

\(F=80\ Kg\cdot 9.09\ m/s^2\)

\(\boxed{F=727.3\ N}\)

The net force exerted on the race-car driver is 727.3 N