Why don't we see other stars during day?

The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)

The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.

To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).

The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).

In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).

Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.

If co > co_critical, the system is considered overdamped (Option E).

If co = co_critical, the system is considered critically damped (Option D).

If co < co_critical, the system is considered underdamped (Option C).

Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.

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Answer:

1.65 h

121.39 km

Explanation:

Given that

speed of the driver, v = 99.5 km/h

time spent resting, t = 26 min

Average speed of the driver = 73.6 km/h

check attachment for calculation and how I arrived at the answer

Answer:

1. Two materials that can be scratched by an iron nail are zinc and aluminum

2. A substance that can be scratched by an iron nail but not a penny is;

Nickel

Explanation:

The hardness of a material can be defined as its ability to resist being plastically deformed at a location due to mechanical scratching, abrasion or indentation

The Mohs hardness scale provides a ranking of materials in the order of hardness with a material having a higher Mohs hardness number being able to scratch other materials which have a lower Mohs hardness number

1. From the Mohs scale of hardness, iron which has an harness number of 4.5 can scratch zinc which has an harness number of 2.5, and iron can also scratch aluminum which has an hardness number of 2.5 to 3

2. A penny is made from copper plated material and will have an outer layer hardness of copper which has an hardness number of 3 on the Mohs scale

Therefore, a penny cannot scratch a material mode of nickel which has an hardness number of 4, while iron which has an hardness of 4.5 will scratch a nickel material

(1) Zinc and aluminum can be scratched by an iron nail.

(2) Nickel can be scratched by an iron nail but not a penny.

The hardness of a material is defined as its ability to resist deformation due to mechanical scratching, abrasion, or indentation.

According to the Mohs hardness scale, a material having a higher Mohs hardness number is able to scratch other materials which have a lower Mohs hardness number.

From the Mohs scale of hardness, iron has a hardness number of 4.5, zinc has a hardness number of 2.5, and aluminum which has a hardness number between 2.5 to 3. So, iron can scratch both, Zinc and Aluminium.

A penny is made from copper-plated material copper has a hardness number of 3 on the Mohs scale. Whereas Nickel has a hardness number of 4. Therefore, a penny cannot scratch a material made of Nickel.

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The change in magnetic flux through the loop is -1.5708 Wb, not 1.6 Wb as initially thought. To calculate the change in magnetic flux through a circular wire coil of radius 25 cm, 20 turns, and a magnetic field of 0.2 T when flipped over, follow these steps:

1. Calculate the coil's area: A = πr² = π(0.25m)² ≈ 0.19635 m².

2. Determine the initial magnetic flux: Φ₁ = B × A × N × cos(θ₁), where θ₁ = 0°, N = 20 turns, and B = 0.2 T. Therefore, Φ₁ = 0.2 × 0.19635 × 20 × cos(0°) ≈ 0.7854 Wb.

3. Calculate the final magnetic flux: Φ₂ = B × A × N × cos(θ₂), where θ₂ = 180°. Hence, Φ₂ = 0.2 × 0.19635 × 20 × cos(180°) ≈ -0.7854 Wb.

4. Determine the change in magnetic flux: ΔΦ = Φ₂ - Φ₁ = -0.7854 - 0.7854 = -1.5708 Wb. The negative sign indicates a change in direction.

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Hi! I'm a few days late since I just saw this question just now, but I'll answer anyway.

Answer:

When an unbalanced force acts on a moving object, the velocity of the object will change. Change in velocity means a change in speed, direction, or both. For example, if you kick a soccer ball and it moves from one place to another, it means that unbalanced forces are acting upon it. The ball moves from one place to another after kicking it so the position changed.

Velocity of the outside edge is 26 m/s. The expression, which represents the relationship among constant speed and angular velocity,

Is it impossible to reach light speed?

No object can go more quickly than 300,000 kph (186,000 miles per second). Only massless particles, such as the photons that constitute light, are capable of traveling at that speed. Any material item cannot be accelerated to the light speed since doing so would require a limitless supply of energy.

Why does speed have a cap?

Two things are intended by speed limits. The main goal of speed restrictions is to increase safety by lowering the hazards brought on by drivers' speed decisions. The goal is to lessen speed differences and the likelihood of vehicle collisions.

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Answer:

Harmful bacteria are called pathogenic

Explanation:

Harmful bacteria are called pathogenic bacteria because they cause disease and illnesses like strep throat, staph infections, cholera, tuberculosis, and food poisoning.

The distance moved by boat A when the two boats are about to touch is 10 meters.

To solve this problem, we can use the principle of conservation of momentum. Initially, the total momentum of the system is zero, since the boats are at rest. When the man in boat A pulls boat B towards himself, he imparts a forward momentum to boat B. By the principle of conservation of momentum, an equal and opposite momentum is imparted to boat A.

We can use the equation:

m1v1 + m2v2 = (m1 + m2)v'

where m1 and v1 are the mass and velocity of boat A initially, m2 and v2 are the mass and velocity of boat B initially, and v' is the final velocity of both boats when they are about to touch.

Plugging in the given values, we get:

(400 kg)(0 m/s) + (400 kg)(0 m/s) = (400 kg + 400 kg)v'

v' = 0 m/s

This tells us that the final velocity of both boats is zero. We also know that the man in boat A pulls boat B a distance of 30 meters. Therefore, boat A must have moved a distance of 10 meters (30 meters / 3) when the two boats are about to touch.

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Answer:

F = 2.45 N

Explanation:

m = 0.25 kg

a = 9.8 m/s^2

F = ma

F = (0.25)(9.8)

F = 2.45 N

Answer:that's 16 I think Explanation:

Answer:

It is either 16 or 17

Explanation:

:)

The statements best describes how a star chart should be held while facing north is, The edge of the map labeled south should be held towards the observer.

What is star chart ?

A map or diagram of the stars and other celestial bodies in the sky is called a star chart. The locations of the stars, constellations, planets, and other celestial bodies are often displayed at a certain time and location on Earth. Star maps can be used to locate celestial bodies in the night sky, to organise astronomical observations, or to track their movements through time.

Given that,

The statements,

In between following options, best describes how a star chart should be held while facing north is,

The edge of the map labeled south should be held towards the observer

This is because when facing north, the direction labeled "south" on the map should correspond to the direction of the actual south, and thus be facing the observer.

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Answer:

the reason I ask is that you are not even going to be a little late to the party but

The angle of incidence from the glass when the reflected light in the glass is linearly polarized is called Brewster's angle.

Brewster's angle is the angle of incidence at which light is polarized when it is reflected from a transparent surface, such as glass. The reflected light at this angle is entirely polarized and has no parallel component.What is polarization of light?When light waves propagate through space, the electric and magnetic fields at each point in the wave can oscillate in different directions.

                        The polarization of light is the orientation of the electric field vector that produces the electromagnetic wave as it propagates. The reflected light from a transparent surface, such as glass, is entirely polarized when the angle of incidence is Brewster's angle. When the angle of incidence is greater than Brewster's angle, both polarizations are reflected, and the reflected light is no longer linearly polarized.

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Given data; Speed of rabbit=7.94 m/s Distance between rabbit and dingo=19.1 m Speed of dingo=11.4 m/s We know that distance, speed, and time are related to each other by the formula `distance= speed × time`

We are supposed to calculate the distance the rabbit was from the burrow. To do that, we will first calculate the time that the rabbit took to reach the burrow from its initial position. We know the speed and the distance covered by the rabbit, so;`

time= distance/speed``=distance traveled by the rabbit/speed of the rabbit`

Therefore, `time taken by the rabbit to reach the burrow= distance between the rabbit and the burrow/speed of the rabbit`. The dingo also took the same time to reach the burrow from its initial position. Therefore,` time taken by the dingo to reach the burrow=distance between the dingo and the burrow/speed of the dingo`.

Equating the time taken by both the rabbit and the dingo, we get;` distance between the rabbit and the burrow/speed of the rabbit= distance between the dingo and the burrow/speed of the dingo `Substituting the values that we know, we get;`(distance between the rabbit and the burrow)/7.94=(19.1+distance between the dingo and the burrow)/11.4`Solving this equation for distance between the rabbit and the burrow, we get;`

distance between the rabbit and the burrow = 7.94 × (19.1 + distance between the dingo and the burrow)/11.4`

Therefore, the distance between the rabbit and the burrow is 13.3 m plus the distance between the dingo and the burrow.

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The angle between the velocity vector and acceleration vector at any given point in the orbit would be 90 degrees, therefore the correct answer is option A.

The rate of change of the velocity with respect to time is known as the acceleration of the object. Generally, the unit of acceleration is considered as meter/seconds².

As given in the If a  satellite in orbit around Earth is in a uniform circular motion then we have to find the angle between the velocity vector and acceleration vector.

In a uniform circular motion, the angle between the velocity vector and acceleration vector is always π/2.

The angle between the velocity vector and acceleration vector at any given point in the orbit would be 90 degrees.

Thus, the correct answer is option A.

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Answer:

ok is this a question? if so i can edit my answer

Explanation:

Answer:

A

Explanation:

Answer:

A

Explanation:

Took Test

The correct equation for velocity is Velocity = displacement / time. The correct option is A.

Velocity is the directional speed of a moving object as an indication of its rate of change in position as observed from a specific frame of reference and measured by a specific time standard.

Speed is the rate at which an object moves along a path in time, whereas velocity is the rate and direction of movement.

To calculate velocity, divide the distance by the time it takes to travel the same distance, then multiply by the direction.

For example, if you traveled 50 miles in one hour westward, your velocity would be 50 miles/1 hour westward, or 50 miles per hour westward.

Thus, the correct option is A.

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Answer:

Liquid water is essential for life to exist. Water can occur in a liquid state only within a specific temperature range, so knowing the temperature range on a planet will help astronomers predict whether life exists on that planet.

The hypotenuse is the initial velocity of the cannonball (56.0m/s). The opposite side is the vertical component of the velocity and the adjacent side is the horizontal component of the velocity.

To determine the unknowns, we need to use trigonometry. Let's use theta to represent the angle at which the cannonball was launched. The vertical component of the initial velocity can be found using the equation:
Vsin(theta) = opposite side
Vsin(theta) = (56.0m/s)sin(theta)
The horizontal component of the velocity can be found using the equation:
Vcos(theta) = adjacent side
Vcos(theta) = (56.0m/s)cos(theta)
We can use these equations to solve for the unknowns. For example, if we wanted to find the angle at which the cannonball was launched, we could set the two equations equal to each other and solve for theta:
Vsin(theta) = Vcos(theta)
tan(theta) = opposite side/adjacent side
tan(theta) = (56.0m/s)sin(theta)/(56.0m/s)cos(theta)
tan(theta) = sin(theta)/cos(theta)
theta = tan^-1(sin(theta)/cos(theta))
Using a calculator, we find that theta is approximately 51.3 degrees. Therefore, the cannonball was launched at an angle of 51.3 degrees.  While the ultimate velocity of an object thrown upward will be zero, the final velocity of an object thrown downward will be twice as fast as the initial velocity. Due to the forces of gravity, when an object is thrown both upward and downward with the same initial velocity, the ultimate velocities will differ. The object thrown upward will have a negative ultimate velocity, while the thing thrown downhill will have a positive end velocity.

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Explanation:

I=q/t

q=I*t

given

t=10min=600sec

I=0.5

\(q = it \\ = 0.5 \times 600 \\ = 300coulomb\)

Charge q=It

I - Current

t - time

q=0.5*10=5C

Charge is a characteristic of a unit of matter that expresses the extent to which it has more or fewer electrons than protons.

q= charge

t= time

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The axial resistance of an axon is calculated using the formula R = ρL/A, where ρ is the resistivity, L is the length, and A is the cross-sectional area. In this case, the axial resistance is 11.28 MΩ.

The resistance along the axon is calculated using the following formula:

R = ρL/A

where:

R is the resistance in ohms

ρ is the resistivity in ohms per meter

L is the length in meters

A is the cross-sectional area in meters squared

In this case, we have:

ρ = 1.6 x 107 Ω.m

L = 0.5 mm = 0.0005 m

A = πr² = π(5 x 10-6)² = 7.854 x 10-13 m²

Therefore, the resistance is:

R = ρL/A = (1.6 x 107 Ω.m)(0.0005 m) / (7.854 x 10-13 m²) = 11.28 MΩ

Therefore, the axial resistance of the axon is 11.28 MΩ.

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The reaction force to the action force during a rocket launch would be C. the force exerted by the ground or launch pad on the rocket.

The force that the ground or launch pad applies to the rocket during a rocket launch will act as a reaction force to the action force. The rocket is propelled upward by the force of explosion caused by the burning fuel and expanding gases. The force that keeps the rocket grounded and keeps it from moving is known as the reaction force, and it is the force that the launch pad or ground exerts in response to this action force.

Equal in magnitude but directed in the opposite direction, the action and reaction forces act on various objects. The reaction force affects the ground or launch pad, whereas the action force affects the rocket.

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Complete question

During a rocket launch, the action force is considered the force of explosion from the burning fuel and expanding gases. Which of the following would be considered the reaction force?

A. The starting force

B. The force of the explosion

C. The force exerted by the ground or launch pad on the rocket.

The total distance traveled will be 18 miles because distance and displacement are different.

While distance and displacement appear to have the same meaning, they actually have very different definitions and implications. Displacement is the measurement of "how far an object is out of place," whereas distance refers to "how much ground an object has covered during its motion."

Distance is the sum of an object's movements, regardless of direction. The distance can be defined as the amount of space an object has covered, regardless of its starting or ending position.

Δd = d1 + d2 + d3.....

The term "displacement" refers to a shift in an object's position. It is a vector quantity with a magnitude and direction. The symbol for it is an arrow pointing from the initial location to the ending place.

Displacement = Final position - Initial position

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Answer:

A

Explanation:

Answer:

A. manipulate the independent variable

Students are going to conduct an experiment to study the effect of a net force applied to an object on the object’s motion. In each trial of the experiment, the students will apply a net force on the object. They also need to take two other measurements. The other quantities they should measure in each trial of the experiment will be mass and acceleration

As we know that Force depend upon mass as well as acceleration , hence it is important to take measurements of mass and acceleration . Since ,

according to newton's third law

F = ma

where

m = mass

a = acceleration

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Answer:

iron,Cobalt and nickel