What is the width of the 90 confidence interval for true population proportion if there are 12 successes in a sample of 25?

Answer:

Georges Lemaître  - theorized that the universe had a beginning

Albert Einstein  - huit a model of the inverse haced on relativity

Galileo Galilei  - was the first to use a telescope to observe the planets

Edwin Hubble  - showed that the universe was expanding

Henrietta Swan Leavitt  - demonstrated a method to calculate the distance of celestial bodies

is my choices report if wrong

Galileo Galilei was the first to use a telescope to observe the planets

Albert Einstein built a model of the universe based on relativity

Henrietta Swan Leavitt demonstrated a method to calculate the distance of celestial bodies

Edwin Hubble showed that the universe was expanding

Georges Lemaître theorized that the universe had a beginning

Science is the methodical, empirically-based pursuit and application of knowledge and understanding of the natural and social worlds.

A method of learning about the world is science. Science allows people to participate in the creation of new knowledge as well as use that knowledge to further their goals. It is both a process, a product, and an institution.

Thus, The first person to observe the planets through a telescope was Galileo Galilei.

Based on relativity, Albert Einstein created a model of the universe.

A technique to determine the separation between celestial bodies was demonstrated by Henrietta Swan Leavitt.

Edwin Hubble demonstrated the expansion of the universe

According to Georges Lemaître, the universe had a beginning.

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The edges of the mirror curve away from you. A convex mirror makes reflected light rays spread out.

Explanation:

a-pulling the rod one-quarter of the way out introduces a negative reactivity worth of 0.33, b- the rate at which reactivity is introduced per cm motion of the rod at the one-quarter position is -0.89.

To solve this problem, we need to use the reactivity-worth equation, which relates the change in reactivity to the movement of the control rods. The equation is

Δρ = Wp/Wo

where:

Δρ = change in reactivity

Wp = worth of the control rod when partially inserted

Wo = worth of the control rod when fully inserted

a. To find the change in reactivity when the rod is pulled one-quarter of the way out, we need to know the worth of the rod when partially inserted. Let's assume that the rod is worth 50 cents when it is one-quarter of the way out (this is just an estimate, but it should be close enough for our purposes). Then, using the reactivity-worth equation:

Δρ = Wp/Wo = (0.50 - 0.75)/0.75 = -0.33

b. To find the rate at which reactivity is introduced per cm motion of the rod, we need to differentiate the reactivity-worth equation with respect to the position of the rod, x:

dΔρ/dx = d(Wp/Wo)/dx = -Wp/(Wo x)

where x is the distance the rod is inserted (expressed as a fraction of its full length). At the one-quarter position, x = 0.75, and we know from part a that Wp = 0.50 and Wo = 0.75. Therefore:

dΔρ/dx = -0.50/(0.75) = -0.89

This means that for every centimeter the control rod is pulled out from this position, the reactivity of the reactor will decrease by 0.89.

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Answer:B

Explanation:

Answer:

Associations Clusters

Explanation:

There is three basic type of clusters, globular clusters, open clusters, associations clusters. Associations cluster consist of younger stars that is younger than globular and open clusters stars.

To discover the youngest stars you could find in some grouping of stars in the Galaxy, type of star group would be the best to search is Associations Clusters.

A galaxy is a massive cluster of gas, dust, billions of stars, and their solar systems that are all bound together by gravity. Earth is a planet in our solar system where we call home.

A galaxy cluster, also known as a cluster of galaxies, is a formation made up of hundreds to thousands of galaxies that are gravitationally coupled to one another.

There is three basic type of clusters, globular clusters, open clusters, associations clusters. Associations cluster consist of younger stars that is younger than globular and open clusters stars.

To discover the youngest stars in the galaxy the best group is Associations cluster.  

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Answer:

The correct option is D

Explanation:

In trying to achieve what the student wanted to see, which is to see the relationship between the weight the cord can hold and how long the cord will stretch. Since the origin of the graph is from zero, the value plotted on the vertical axis would be just the length caused by each weights. Thus, the original length would have to be subtracted from the measured length to determine the actual length caused by the weight added to the cord.

Explanation:

Thermal conductivity is a measure that refers to the rate at which heat is transferred by conduction through a unit cross-section area of a material.

or in simpler terms how well a substance conducts heat.

its formula is seen in the attachment. hope this helps.

In general, the concept of time boxing refers to a project management technique that involves setting specific time frames for completing tasks or activities. This approach is often used in agile software development and other iterative methodologies, as it helps to promote focus and accountability among team members. Weight boxing, on the other hand, is not a widely recognized term in project management, and it is unclear what this expression might refer to.

The remaining numerical values - 0.7197, 0.6777, 0.3975, 0.068, -0.1281, and 0.0113 - could represent a variety of different things depending on the context. For example, they could be measurements of physical quantities, statistical values, or mathematical coefficients. Without further information, it is impossible to provide a more specific interpretation or analysis.

In conclusion, while the given prompt contains a series of numerical values, it lacks the context and instructions necessary to provide a meaningful response. If you have any additional information or questions, please feel free to provide them, and I will do my best to assist you.

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Answer:

1. Machines can increase the speed of a task, allowing more work to be done in a shorter amount of time.

2. Machines can reduce the amount of physical effort required to complete a task, allowing for more efficient use of energy.

In a conventional current flow model, current is considered as the flow of positive charges. According to this model, the direction of current is defined as the direction in which positive charges would flow.

In reality, however, the actual flow of charges is due to the movement of negatively charged electrons.

In a closed circuit, the conventional current flows from the positive terminal of the power source (such as a battery) towards the negative terminal. This convention was established before the discovery of the electron's negative charge. The positive charges, which are typically attributed to protons in the atoms, are considered to move in the opposite direction to the actual flow of electrons.

So, if we were to observe a circuit from the perspective of conventional current flow, the current would be flowing from the positive terminal to the negative terminal of the power source. This convention helps establish a consistent reference for understanding and analyzing electrical circuits, even though it contradicts the actual movement of electrons.

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Answer:

b) They will have the same accelerationExplanation:

The acceleration of an object in free fall is known as the acceleration due to gravity, g, which is due to the attractive force of the Earth's gravitational field on the object. and is given by the following formula;

\(g = G \times \dfrac{Mass \ of \ the \ Earth}{(Distance \ between \ the \ object \ and \ the \ center \ of \ the \ Earth)^2}\)

\(g = G \times \dfrac{M}{r^2}\)

r = R + h

Where;

R = The radius of the Earth

h = The height of the center of the object above Earth's surface

Therefore, due to the large magnitude of R, and the comparatively small magnitude of h, R + h is approximately R, that is R + h ≈ R and R ≈ r, which gives;

\(g = G \times \dfrac{M}{R^2}\)

Therefore, given that, the mass of the Earth, M, the radius of the Earth, R and the gravitational constant, G, are all constant, the value of g is therefore, constant for all objects and the value is approximately 9.81 m/s².

The velocity of each good kids are:

The velocity of each good kids can be obtained as illustrated below:

For Brooklyn

Velocity = distance / time

Velocity = 2800 / 373

Velocity = 7.5 m/s

For Ava

Velocity = distance / time

Velocity = 2800 / 363

Velocity = 7.7 m/s

For Jadya

Velocity = distance / time

Velocity = 2800 / 357

Velocity = 7.8 m/s

For Bri

Velocity = distance / time

Velocity = 2800 / 333

Velocity = 8.4 m/s

For Gabby

Velocity = distance / time

Velocity = 2800 / 408

Velocity = 6.9 m/s

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Troposphere, stratosphere, mesosphere, thermosphere and exosphere.

Earth's atmosphere has five major layers.

From lowest to highest, layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere.

a) What are the conditions in the troposphere?

The atmospheric temperature descends upward with a slope of ~10 K km−1 for dry air and ~7 K km−1 for wet air in troposphere.

The temperature of troposphere decreases with an increase in height.

B) What sort of temperatures would she experience in the stratosphere? What other layer is found within the stratosphere?

The temperature in the stratosphere ranges from- 60° F at the troposphere boundary to -5°F at the top.

The temperature increase is due to the ozone layer that absorbs ultraviolet light from solar radiation.

C)What sort of temperatures would she experience in the mesosphere?

The temperature in the mesosphere ranges from -2.5°C to -90°C

The temperature decreases because of a decrease in the absorption of penetrating solar radiation.

The atmosphere gets cooler with an increase in altitude because an increase in distance from the Earth's surface.

D)What sort of temperatures would she experience in the thermosphere? What other layer is found within the thermosphere?

4,500°F is the temperature of thermosphere.

Temperatures climb sharply in the lower thermosphere , then level off and hold fairly steady with increasing altitude above that height.

Temperatures in the upper thermosphere can range from about 500° C (932° F) to 2,000° C (3,632° F) or higher.

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We need to prioritize safety when an earthquake occurs due to the potential hazards and dangers associated with seismic activity. Earthquakes can cause significant damage to buildings, infrastructure, and the natural environment, leading to the potential for injuries, loss of life, and long-term consequences. Here are some reasons why safety is crucial during an earthquake:

1. Protection from structural collapse: Earthquakes can cause buildings and structures to collapse or suffer severe damage. By following safety protocols, such as seeking shelter in sturdy structures or designated safe areas, we can reduce the risk of being trapped or injured by falling debris.

2. Minimizing injuries: During an earthquake, objects can be dislodged, glass can shatter, and furniture can topple, causing injuries from flying debris or falling objects. Taking precautions, such as taking cover under sturdy furniture or finding safe spots away from windows, can help minimize the risk of injuries.

3. Mitigating secondary hazards: Earthquakes can trigger secondary hazards such as landslides, tsunamis, or gas leaks. Being aware of evacuation routes, staying away from unstable slopes or coastal areas, and shutting off gas lines can help prevent additional risks and ensure personal safety.

4. Facilitating emergency response: By prioritizing safety during an earthquake, individuals and communities can better manage the situation and enable emergency response teams to carry out their work effectively. When people are aware of safety measures and cooperate with authorities, it helps minimize panic and streamline rescue and recovery efforts.

5. Preparedness for aftershocks: Aftershocks are common following an earthquake and can be just as dangerous as the initial tremor. Being cautious and adhering to safety guidelines even after the main earthquake can protect individuals from further harm caused by subsequent seismic activity.

In summary, prioritizing safety during an earthquake is essential to protect ourselves and others from the potential dangers associated with seismic events. By being prepared, following safety protocols, and cooperating with emergency response teams, we can mitigate risks, reduce injuries, and increase our chances of survival and recovery in the aftermath of an earthquake.

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Answer:

1. Solar wind: a stream of plasma.

2. Coronal mass ejection: includes prominences and solar flares.

3. Gamma ray photon: energy released during nuclear fusion.

Explanation:

1. Solar wind: a stream of plasma i.e charged particles such as ions, protons, alpha, and electrons that continuously escape at high speed from the Sun because of the very hot plasma contained in the solar corona.

2. Coronal mass ejection: includes prominences and solar flares that flow outward into interplanetary space. Thus, it's a release of solar wind plasma and magnetic field from the outer atmosphere or corona of the sun.

Additionally, a solar prominence is also known as filament and it can be defined as a large, bright, dense cloud of luminous ionized gas such as hydrogen, sodium calcium, etc., that erupts (extends) from the surface of the sun. It can linger in the corona for a very long time, reaching hundreds of thousands of kilometers into the sun's atmosphere (space).

3. Gamma ray photon: energy released during nuclear fusion of radioactive isotopes such as cobalt-60 or cesium-137. It has the shortest wavelength and highest energy in the electromagnetic radiation spectrum.

An electromagnetic spectrum refers to a range of frequency and wavelength that an electromagnetic wave is distributed or extends. The electromagnetic spectrum comprises of gamma rays, visible light, ultraviolet radiation, x-rays, radio waves, and infrared radiation.

Answer:

A) Variety of Living Things

Explanation:

Biodiversity is defined as the variety of life in the world or in a particular habitat or ecosystem.

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Answer: First runner has more kinetic energy

Explanation:

The formula for kinetic energy is defined to be:

\(KE=\frac{1}{2} mv^2\)

Plug in the value for each runner to get:

\(KE_1=0.5(46kg)(8m/s)^2=1472J\)

\(KE_2=0.5(92kg)(4m/s)^2=736J\)

1. All the relevant resistors are in series, so the total (or equivalent) resistance is the sum of the resistances of the resistors: 20 Ω + 80 Ω + 50 Ω = 150 Ω [choice A].

2. The ammeter will read the current flowing through this circuit. We can find the ammeter reading using Ohm's law in terms of the electromotive force provided by the battery: I = ℰ/R = (30 V)(150 Ω) = 0.20 A [choice C].

3. The voltmeter will measure the potential drop across the 50 Ω resistor, i.e., the voltage at that resistor. We know from question 2 that the current flowing through the resistor is 0.20 A. So, from Ohm's law, V = IR = (0.20 A)(50 Ω) = 10. V, which will be the voltmeter reading [choice F].

4. Trick question? If the circuit becomes open, then no current will flow. Moreover, even if the voltmeter were kept as element of the circuit, voltmeters generally have a very high resistance (an ideal voltmeter has infinite resistance), so the current moving through the circuit will be negligible if not nil. In any case, the ammeter reading would be 0 A [choice B].

64 people are allowed daily into the coyote buttes north area, which includes the wave.

The Wave and other aesthetically stunning natural sandstone formations can be found in Coyote Buttes North.

It is a small portion of the 112,500-acre Paria Canyon-Vermilion Cliffs Wilderness of Northern Arizona.

How was the wave in coyote buttes formed?

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64 people are allowed daily into the coyote buttes north area, which includes the wave.

The Wave and other aesthetically stunning natural sandstone formations can be found in Coyote Buttes North.

It is a small portion of the 112,500-acre Paria Canyon-Vermilion Cliffs Wilderness of Northern Arizona.

To enter Coyote Buttes North (The Wave) and Coyote Buttes South, you need a permission.

There are only daytime permits available.

Permits have a daily maximum.

Coyote Buttes North (The Wave) permits are distributed via lottery.

The Wave is a Navajo Sandstone formation found in the Paria Canyon-Vermilion Cliffs Wilderness of Northern Arizona.

The amazing patterns in the rock here were created by the wind and erosion over millions of years.

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Answer:

Sam's average velocity for the entire walk is approximately;

0.075 km/min

Explanation:

The given parameters of the Lake Loop Trail are;

The distance of the trail Sam takes his dog to walk around = 5-km

From the table for the position and time, we have;

\(\begin{array}{ccc}Position \ (km) &&Time \ (min)\\0&&0\\1&&12\\2&&22\\3&&33\\4&&54\\5&&67\end{array}\)

Plotting the given points gives the attached chart created with Microsoft Excel

The coordinates of the points are A(0,0), B(67, 5), C(67, 0)

By the definition of average velocity, we have;

\(Average \ velocity = \dfrac{Total \ distance}{Total \ time \ taken}\)

From the plot of the points therefore, we have;

\(Average \ velocity= \dfrac{Length \ of BC}{The \ time \ elapsed \ between \ AC} = \dfrac{5 \ km - 0 \ km}{67 \ min - 0 \ min} = \dfrac{5 \ km}{67 \ min} \approx 0.075 \ km/min\)Therefore;

Sam walked at an average velocity of approximately 0.075 km/min.

The distance between you and the image of your friend is the same as the distance between your friend and the plane mirror. Therefore, the distance is 7 meters. The answer is D.

1. Your friend's image in the plane mirror will be at the same distance behind the mirror as your friend is in front of it. Since your friend is standing 2m in front of the mirror, their image will be 2m behind the mirror.
2. You are standing 3m directly behind your friend. Since your friend is 2m in front of the mirror, the total distance between you and the mirror is 2m + 3m = 5m.
3. Now, to find the distance between you and the image of your friend, add the distance between you and the mirror (5m) to the distance between the mirror and your friend's image (2m).

So, the distance between you and the image of your friend is 5m + 2m = 7m. The correct answer is D. 7m.

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The x-component of A vector is - 2.39 unit.

The y-component of A vector is  - 4.02  unit.

Vector is a colloquial term  that refers to some quantities that cannot be expressed by a single number (a scalar) or to elements of some vector spaces.

The magnitude of A vector is 4.68 unit.

The  direction of A vector is 30.7° to the left of the negative y-axis.

So, A vector is in 3rd co-ordinate.

Hence, the x-component of A vector is = - Asin30.7°

= - 4.68 × sin30.7°

= - 2.39 unit.

Hence, the y-component of A vector is = - Acos30.7°

= - 4.68 × cos30.7°

= - 4.02  unit.

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Answer:

LETTER C IS THE ANSWER

Explanation:

this is my answer

Answer:

20.4 cm; 2.4 cm  

Explanation:

The formula for the pressure p exerted by a column of a liquid with density ρ and height h is

p = ρgh

where h = the acceleration due to gravity

If you have two liquids balancing each other in a U-tube

     p₁ = p₂

ρ₁gh₁ = ρ₂gh₂

 ρ₁h₁ = ρ₂h₂

Data:

ρ₁ = 1010 kg/m³; h₁ = 18 cm

ρ₂ = 890 kg/m³; h₂ = ?          

1. Height of oil column

We measure from the horizontal red line.

\(\begin{array}{rcl}\rho_{1}h_{1} & = &\rho_{2}h_{2}\\\text{1010 kg/m}^{3} \times \text{18 cm} & = & \text{890 kg/m}^{3} \times h_{2}\\\text{18 180 cm} & = & 890h_{2}\\h_{2} & = & \dfrac{\text{18180 cm}}{890}\\\\ & = & \text{20.4 cm}\\\end{array}\\ \text{The height of the oil column is $\textbf{20.4 cm}$}\)

2. Height of oil above water

h₂ - h₁ = 20.4 cm – 18 cm = 2.4 cm

Answer:

P = I V = I*2 R       power used in resistive circuit

Doubling the current will cause a 4X increase in power consumed

The forces acting on a skateboard include gravity, friction, air resistance, and applied force, and they all affect the motion of the skateboard in different ways.

When a skateboard is in motion, several forces act on it that affect its movement. The main forces acting on a skateboard are:

Gravity: This is a force that pulls the skateboard downwards towards the ground. The weight of the skateboard and the rider are also affected by gravity.

Friction: This is a force that opposes the motion of the skateboard. Friction is caused by the skateboard's wheels rolling on the ground or surface, and it can slow down the skateboard's speed.

Air resistance: This is a force that opposes the motion of the skateboard as it moves through the air. The faster the skateboard moves, the more air resistance it experiences.

Applied force: This is the force applied by the rider to propel the skateboard forward or to perform tricks. The amount of applied force determines how fast or slow the skateboard moves.

The combination of these forces affects the motion of the skateboard. If the applied force is greater than the forces of friction, air resistance, and gravity, the skateboard will accelerate. If the forces of friction, air resistance, and gravity are greater than the applied force, the skateboard will slow down or come to a stop.

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Answer:    

Explanation:

The distance to the star, in parsecs, is 30 pc.

The distance to the star, in light years, can be calculated using the conversion factor of 3.26 light years per parsec. Therefore, the distance to the star in light years is approximately 97.8 light years.

The distance to a star can be determined using its measured parallax angle. Parallax is the apparent shift in the position of an object when viewed from two different points. It is measured in units of arc seconds.

The formula to calculate the distance to a star in parsecs is:

Distance (in pc) = 1 / Parallax (in arc sec)

Given that the measured parallax is 1/30 of an arc second, we can substitute this value into the formula:

Distance (in pc) = 1 / (1/30) = 30 pc

This gives us the distance to the star in parsecs.

To convert the distance to light years, we use the conversion factor of 3.26 light years per parsec. Multiplying the distance in parsecs by this conversion factor gives us the distance in light years:

Distance (in light years) = 30 pc × 3.26 light years/pc = 97.8 light years

Therefore, the distance to the star is approximately 30 parsecs or 97.8 light years.

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