Hubble investigates the relationship between the red-shift of light and distant galaxies.
give the link that Hubble found between observing red-shift and how far away they are from Earth .

The correct option is 3. 6.9 × 10¹². More electrons than protons are present on the metal sphere.

An electron carries a negative charge of 1.6 × 10⁻¹⁹ C.A proton carries a positive charge of 1.6 × 10⁻¹⁹ C.The total charge on the sphere is -1.1 × 10⁻⁶ C.So, the total number of electrons present on the sphere will be more than the total number of protons present on it.

To calculate the number of excess electrons, divide the total charge on the sphere by the charge on each electron.n= Total charge on the sphere / Charge carried by one electron n = 1.1 × 10⁻⁶ C / 1.6 × 10⁻¹⁹ C = 6.875 × 10¹²6.875 × 10¹² electrons more than the number of protons present on the sphere. 6.9 × 10¹² electrons are more than protons present on the sphere. Therefore, the correct option is 3. 6.9 × 10¹².

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Value analysis is a method used to evaluate the worth and effectiveness of an organization or project.

In the case of DEWA (Dubai Electricity & Water Authority), conducting a value analysis can provide insights into the overall value created by the organization. Here are some key points to consider in a value analysis of DEWA:

1. Service Quality: Evaluate the quality and reliability of the electricity and water services provided by DEWA. Assess factors such as uptime, response time, customer satisfaction, and the overall impact on the daily lives of residents and businesses in Dubai.

2. Cost Efficiency: Analyze the cost-effectiveness of DEWA's operations, including the generation, transmission, and distribution of electricity, as well as water production and distribution. Assess the efficiency of resource utilization, cost management practices, and the impact on consumer tariffs.

3. Sustainability: Evaluate DEWA's commitment to sustainable practices, such as renewable energy integration, water conservation efforts, and environmental stewardship. Assess the organization's contributions to reducing carbon emissions and promoting a greener future.

4. Innovation and Technology: Assess DEWA's adoption of innovative technologies, such as smart grids, advanced metering systems, and digital solutions. Evaluate the impact of these technologies on service delivery, efficiency, and customer experience.

5. Stakeholder Engagement: Analyze DEWA's relationships with stakeholders, including customers, suppliers, government entities, and the community. Assess the effectiveness of communication, collaboration, and the organization's contribution to social and economic development in Dubai.

By conducting a comprehensive value analysis of DEWA, stakeholders can gain a holistic understanding of the organization's performance, impact, and value proposition. This analysis can guide decision-making, identify areas for improvement, and support DEWA's ongoing efforts to provide reliable, sustainable, and affordable electricity and water services to the residents and businesses of Dubai.

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The impact force is 0.23 N.

An impact force is a force that causes a shock or a high impact in a short period of time. It happens when two things collide. This collision occurs when one object falls onto, or slams into, another object. This collision causes a shock because energy is transferred to the impacted entity (s).

v = m/s. The kinetic energy immediately preceding impact equals the gravitational potential energy at the height from which it was dropped: K.E. = J.

A car weighing 2000 kg travels at 60 km/h (16.7 m/s) before collapsing into a massive concrete wall. The front of the car makes a 0.5 m impact (the deformation distance). The force of the impact is 28 times that of gravity.

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Answer:

It would be 2.2 if you have to round the five to the one but if your not rounding the number, it'd be 2.1.

Explanation:

Answer:

A satellite on non-equatorial orbit would show daily motion even if its period is exactly 1 sidereal day.

Explanation:

The highest point on a wave is the crest

Answer:

B

Explanation:

just took the test

Answer:

b

Explanation:

To determine the mass of the heaviest box you will be able to move, we need to consider the maximum static friction force that can be exerted on the box without it moving. The maximum static friction force can be calculated using the equation:

F_static_max = μ_s * N

where F_static_max is the maximum static friction force, μ_s is the coefficient of static friction, and N is the normal force.

In this case, the normal force is equal to the weight of the box, which is given by:

N = m * g

where m is the mass of the box and g is the acceleration due to gravity (approximately 9.8 m/s^2).

Given:

Angle below the horizontal: 25°

Force applied: 750 N

Coefficient of static friction: 0.76

To calculate the mass of the heaviest box, we need to find the maximum static friction force that can be exerted and set it equal to the applied force:

F_static_max = F_applied

μ_s * N = F_applied

μ_s * m * g = F_applied

μ_s * m * g = 750 N

Solving for m:

m = 750 N / (μ_s * g)

m = 750 N / (0.76 * 9.8 m/\(s^2\))

m ≈ 96.38 kg

Therefore, the mass of the heaviest box you will be able to move is approximately 96.38 kg. Since none of the given answer choices match this value, it seems there might be a calculation error or the correct answer is not provided.

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Answer:

Surface

Explanation:

Rayleigh Waves—surface waves that move in an elliptical motion, producing both a vertical and horizontal component of motion in the direction of wave propagation. Particle motion consists of elliptical motions (generally retrograde elliptical) in the vertical plane and parallel to the direction of propagation.

Answer:

The right answer is "131812.5".

Explanation:

The given values are:

Mass,

m = 15 kg

Velocity,

v = 45 m/s

As we know,

⇒  \(PE_1=mgh\)

On putting the values, we get

⇒          \(=15\times 9.8\times 1000\)

⇒          \(=147000 \ J\)

According to the question,

\(KE_1=0 \ J\)

\(PE_f=0 \ J\)

⇒  \(KE_f=\frac{1}{2}\times 15\times 45^2\)

⇒           \(=\frac{1}{2}\times 15\times 2025\)

⇒           \(=15187.5 \ J\)  

hence,

⇒  \(PE_i=KE_f+W_{air}\)

or,

⇒  \(W_{air} = PE_i-KE_f\)

⇒          \(=147000-15137.5\)

⇒          \(=131812.5 \ J\)

Answer:

2as = v² - u²

v = √(2as + u²)

v = √(2 x 4 x 400 + 13²)

v = 58 m/s

Explanation:

Answer:

58

Explanation:

correct

The best description of Jodi's error is "The electrons move from areas of low to high electric potential." because the electrons actually move from areas of high to low electric potential. thus option 2 is the answer.

Jodi's error is in statement 2, which says that electrons move from areas of low to high electric potential. In reality, electrons move from areas of high to low electric potential. This is because electric potential represents the energy per unit charge, and electrons are negatively charged particles that naturally move from higher energy levels to lower ones. The direction of electron flow determines the direction of electric current, which is the flow of electric charge. The other statements on Jodi's list are generally correct, including the fact that voltage (or potential difference) is what drives current flow, and that current is measured in amperes.

However, it's important to note that the movement of electrons in a current is not always continuous, as they can be impeded by resistance, which causes them to lose energy and generate heat.

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The correct question Is:

Jodi made a list about electric current to help her study for a test.

1) Movement of electrons is continuous in a current.

2) Electrons move from areas of low to high electric potential.

3) Voltage causes current to flow.

4) Rate at which current flows are measured in amperes.

Which best describes Jodi’s error?

The movement of electrons is not always continuous.

Electrons move from areas of high to low electric potential.

Resistance causes current to flow.

The rate at which current flows is measured in ohms.

Answer:

\(\huge\boxed{\sf P.E. = 14700\ Joules}\)

Explanation:

This work done is in the form of Potential Energy so we'll use the formula of Potential Energy.

Given Data:

Mass = m = 250 kg

Acceleration due to gravity = g = 9.8 m/s²

Height = h = 6 m

Required:

Work Done in the form of Potential Energy = P.E. = ?

Formula:

P.E. = mgh

Solution:

P.E. = (250)(9.8)(6)

P.E. = 14700 Joules

\(\rule[225]{225}{2}\)

Hope this helped!

Answer:

99kg m/s

Explanation:

\(p=m\Delta v \\\\\Delta v=20-0.20=19.8m/s \\\\p=5(19.8)=99\)

Hope this helps!

Answer:

Solution,

Initial speed(u)=20 m/s

final speed(v)=0.20 m/s

change in momentum∆P=m(v-u)

∆P=5(0.20-20)

∆P=5*19.8

∆P=99 kg m/s

Momentum of the body is decreased by 99 kg m/s

hope this helps...

Good luck on your assignment...

Answer:

The answer is A good luck :P

Answer:

A

Explanation:

The light Bounces off because it is reflecting off glass or anything else

Answer:

A

Explanation:

Ultraviolet light occurs after white light;

Do you know why gamma rays are harmful because of their high frequency and short wavelength leading to high intensity.

Though the frequency is higher than that of white light, its because of its intensity.

Ultraviolet rays comes handy from depletion of the earth's ozone layer

Hence harmful Ultraviolet rays from the sun attacks the skin Leading to Sun burn and other things.

Answer:

High frequency is the answer

Explanation:

Took pf test is was 100% correct

Answer:

vhijko and eye rudiieidjdjddjjd

Explanation:

jdjdjdjdjfjofkd ruudoeksowkosksd and nkdeondjvndkxnfuvjfk

Answer:

800 joules

Explanation:

In physics, work is defined as

F = W x d (change)

Where  is the word done,  is the force that move the object and  is the change of the position of the object.

In this case, we have

F = 200 N

d= 6m - 2m = 4m , remember that the difference refers to the actual subtraction between the final point and the initial point of the object.

Replacing these values, we have

W = 200 N x 4m

W = 800 joules

Answer:

1.5 m/s ; - 1.5 m/s²

Explanation:

F = ma

F = Force ; m = mass of body ; a = Acceleration

Hence,

a = F/m

F = 6N applied in the direction of motion of the. Body

a = 6N / 4 kg

a = 1.5 m/s² in the direction of motion.

If the force is applied in the opposite direction of motion :

F = ma

a = F/m

a = 6 / 4

a = 1.5 m/s²

Simc efoece is applied in the opposite direction of motion :

We have a negative acceleration (deceleration) = - 1.5 m/s²

The puppy was not moving relative to Daylon, the wagon, or his collar.

He was moving relative to a point on the sidewalk.

Note that the puppy did NOT get his walk.

a) The speed of the pendulum at the lowest point is approximately 6.26 m/s.

b)The maximum angle of the swing assuming negligible air resistance is determined by the height attained by the pendulum, which is 2 meters.

a) To determine the speed of the pendulum at the lowest point, we can use the conservation of mechanical energy. At the lowest point, the pendulum has maximum kinetic energy and minimum potential energy. The total mechanical energy, E, is given by the sum of kinetic and potential energy:

E = KE + PE

At the lowest point, all potential energy is converted into kinetic energy, so:

E = KE

The potential energy at the highest point is given by:

PE = mgh

Where m is the mass (1.5 kg), g is the acceleration due to gravity (9.8 m/s^2), and h is the height (2.0 m).

PE = (1.5 kg)(9.8 m/s^2)(2.0 m) = 29.4 J

Since E = KE, the kinetic energy at the lowest point is also 29.4 J.

The kinetic energy is given by:

\(KE = (1/2)mv^2\)

Where v is the velocity (speed) of the pendulum at the lowest point.

\(29.4 J = (1/2)(1.5 kg)v^2\)

\(v^2 = (2)(29.4 J) / (1.5 kg)\)

\(v^2 = 39.2 m^2/s^2\)

v = √(39.2) ≈ 6.26 m/s

b) The maximum angle of the swing can be determined using the conservation of mechanical energy. When neglecting air resistance, the total mechanical energy remains constant throughout the swing. At the highest point, the pendulum momentarily comes to a stop, so its kinetic energy is zero. Therefore, the total mechanical energy is equal to the potential energy at the highest point.

E = PE

PE = mgh

Where m is the mass (1.5 kg), g is the acceleration due to gravity (9.8 m/s^2), and h is the maximum height attained by the pendulum.

PE = (1.5 kg)(9.8 m/s^2)(h) = 14.7h J

Since E = PE, the total mechanical energy is also 14.7h J.

At the lowest point, all the potential energy is converted into kinetic energy, so:

\(KE = (1/2)mv^2\)

\(KE = (1/2)(1.5 kg)(6.26 m/s)^2 = 29.4 J\)

Since the total mechanical energy remains constant:

29.4 J = 14.7h J

h = 2 meters

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The magnitude of the K for the restraining line is approximately 196,000 N/m. To calculate the magnitude of K, we can use Hooke's Law, which states.

the force exerted by a spring is directly proportional to its displacement. In this case, the displacement is the distance the aircraft needs to be brought to a halt, which is 120 meters. The force exerted by the spring is equal to the mass of the aircraft multiplied by its acceleration. Since the aircraft needs to be brought to a halt, the acceleration is the final velocity (0 m/s) minus the initial velocity (70 m/s) divided by the time taken to stop (which is not given). Rearranging the equation, we can solve for K. Using the values provided, we find K ≈ 196,000 N/m.

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The magnitude of the tension force pulling the block up the incline is 12.666 N

What is magnitude?

magnitude describe the size or amount of a quantity, usually represented by a numerical value. It can refer to the absolute value of a number, the size of a vector, the strength of a force or field, or the intensity of a quantity such as sound or light.

To solve this problem, we can use Newton's second law of motion, which states that the net force acting on an object is equal to the product of its mass and acceleration:

ΣF = ma

where ΣF is the net force, m is the mass, and a is the acceleration.

In this case, the block is being pulled up a rough incline, so there are two forces acting on it: the force of gravity pulling it downward and the tension force pulling it up the incline. We can resolve these forces into components parallel and perpendicular to the incline:

Since the block is being pulled up the incline with a constant acceleration, the net force parallel to the incline is equal to ma, where a is the acceleration. Therefore, we can set up an equation for the net force parallel to the incline:

ΣF_parallel = T - mg sin θ - μk mg cos θ = ma

where μk is the coefficient of kinetic friction between the block and the incline. Solving for T, we get:

T = ma + mg sin θ + μk mg cos θ

T = (3.7 kg)(0.3 m/s²) + (3.7 kg)(9.8 m/s²) sin 21° + (0.17)(3.7 kg)(9.8 m/s²) cos 21°

T = 12.666 N

Therefore, the magnitude of the tension force pulling the block up the incline is 12.666 N (to three significant figures).

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The flex in the mesh is necessary to allow for the force to be applied along the axis of the structure and to balance the torque generated by the force, resulting in the system being in equilibrium when horizontal.

The concept of equilibrium in physics refers to a state where all the forces acting on a system are balanced, resulting in no acceleration. In order for an object to be in equilibrium, the net force acting on it must be zero, and the net torque must also be zero.
When it comes to a mesh or a structure made of two rods that are at a slight angle to each other, it is important to consider the torque generated by a force. Torque is a measure of the rotational force applied to an object, and it is dependent on both the magnitude of the force and the distance from the point of rotation.
In the case of a straight rod, the torque generated by a force can be balanced at any angle because the force is applied directly along the axis of the rod, resulting in a net torque of zero. However, in a structure made of two rods at a slight angle, the force may not be applied directly along the axis of either rod, resulting in a net torque that is not zero.
This is where the concept of flex comes into play. By having a flex in the mesh, it allows for the force to be applied along the axis of the structure, resulting in a net torque of zero and the system being in equilibrium. Without this flex, the structure would only be in equilibrium at a single angle where the net torque generated by the force is zero.

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Malik walked up and back down an empty 18m long escalator at a constant speed of 0.5 m/s, while the escalator's speed remained constant.

Malik's walk up and down the 18m long escalator was affected by the speed of the escalator. Since the escalator was going up, it made his trip up faster, taking only 22.5 seconds. However, going down took him longer, about 90 seconds. We can assume that the speed of the escalator was constant, meaning it remained the same throughout Malik's trip.
To calculate Malik's walking speed, we can use the formula:
distance = speed x time
Since Malik walked up and back down the 18m long escalator, the total distance he covered is 36m.
For the first leg of his trip, going up, we can use the formula to calculate his speed:
18m = speed x 22.5s
Speed going up = 18m/22.5s = 0.8 m/s
For the second leg of his trip, going down, we can use the formula to calculate his speed:
18m = speed x 90s
Speed going down = 18m/90s = 0.2 m/s
Therefore, Malik's constant walking speed is the average of his speed going up and down:
Average speed = (0.8 m/s + 0.2 m/s)/2 = 0.5 m/s
In conclusion, Malik walked up and back down an empty 18m long escalator at a constant speed of 0.5 m/s, while the escalator's speed remained constant.

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When a slow pull is applied to the bottom string, the force gradually increases. This force eventually becomes strong enough to break the bottom string.

The breaking of the string can be explained through a step-by-step process:

1. As you slowly pull on the bottom string, the tension in the string increases.
2. The increasing tension creates stress within the string material.
3. When the stress exceeds the string's breaking strength, it snaps.
4. The heavy ball remains hanging by the top string.

The key terms involved in this scenario are force, tension, stress, and breaking strength. The slow pull applies a force that increases tension and stress in the string until it reaches its breaking strength, ultimately causing it to break.

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Answer:

5.59 m/s2

Explanation:

F = 1900 N

m = 340 kg

F = ma

Therefore, a = 1900/340 = 5.59

Answer:

D

Explanation:

The least of the conditions that can result in fossilization would be when an organism is a prey to several species.

Fossils are remains or traces of organisms that have been geological preserved and a prey is an organism that is often hunted and serves as food to bigger organisms. When an organism is eaten, the probability of it becoming a fossil becomes low. Unless such an organism is usually partially eaten by predators, there would not be any remains, let alone being fossilized.

The correct option is D.

0.00025 N is the magnitude of the net force on the first wire in (figure 1).

The total of all forces exerted on an item is known as the net force. A mass can accelerate due to net force. A body is subject to another force whether it is at rest or in motion. When there are a lot of forces acting on a system, the phrase "net force" is employed.

From the diagram, first wire has an attracting force from third wire at 0.04 m distance and a repelling force from second wire at 0.02 m distance.

Expression of the force is -

F = [µ ×π×(I)² × L] / (2πd)

When d = 0.02 m,

or, F = [4 ×π× 10⁻⁷(10)² × 0.50] / (2π × 0.02)

or, F = 0.0005 N

And when d = 0.04 m,

or, F = [4 ×π× 10⁻⁷(10)² × 0.50] / (2π × 0.04)

or, F =  0.00025 N

So, the net force on first wire  = 0.005 - 0.00025

= 0.00025 N repelling or upward.

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The complete question is as follows:

What is the magnitude of the net force on the first wire in (Figure 1)?

Express your answer in newtons.