The orbit of the moon about the earth is approximately circular, with mean radius of 3,84. 108m. It takes 27,3 days for the moon to complete one revolution about the earth. Find: a) the mean orbital speed of the moon; b) its centripetal acceleration

The object should be placed 46 cm from the converging lens.

To produce a real image which is the same size as the object using a converging lens with a focal length of 23 cm, the object should be placed at a distance equal to twice the focal length of the lens. This is known as the object distance.

So, using the formula 1/f = 1/di + 1/do, where f is the focal length of the lens, di is the image distance and do is the object distance, we can solve for the object distance.

1/23 = 1/di + 1/(2*23)

Simplifying this equation gives:

1/di = 1/23 - 1/46

1/di = 0.0217

Therefore, the image distance is di = 46 cm. This means that the object should be placed 46 cm away from the lens to produce a real image which is the same size as the object.

To produce a real image that is the same size as the object using a converging lens with a focal length of 23 cm, you should place the object at a distance of 46 cm from the lens. This is because, for a real image with the same size as the object, the object distance (u) and image distance (v) should be equal, and using the lens formula:

1/f = 1/u + 1/v

Where f is the focal length. Since u = v, we can rewrite the formula as:

1/f = 1/u + 1/u => 1/f = 2/u

Now, solving for u:

u = 2f

Plugging in the given focal length (f = 23 cm):

u = 2(23 cm) = 46 cm

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Answer:

Explanation:

His top speed is a blip that occurs for less than the full time he was out. Below is a graph showing what he did from 1 o'clock to 9. He was walking from 1 to the point where starts walking faster and then back down again to 2. The line at 2 is longer than the triangular shape that shows where he speeded up. Then he went back down to 2 and continued at that speed until 9.

Obviously he spent more time at 2 than he did at 4 and therefore his average speed will less than the 4 speed.

Remember that average speed = total distance / total time.

Energy in should always be equal to energy out. This is a False statement.

- Energy In: Energy put into the body in form of calories from food like fats, carbohydrates and proteins.

- Energy Out: Energy burn for basic functions of the body like beating of the heart during physical movements.

When we consume more energy but does not consume it upto its potential, the body keeps storing the excess amount of energy as body fat. Maintaining a balance between Energy In and Energy Out is important to live a healthy lifestyle since the disbalance creates problems to the body.

It is easier to accurately measure change in energy than to measure the amount of energy present.

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Answer:

Facts are simple, basic observations that have been shown to be true. Laws are generalized observations about a relationship between two or more things in the natural world.

Explanation:

The law can be based on facts and tested hypothesizes, according to NASA.

Answer:

Is there any thing miss from the question

In a classical sonata, there are typically four movements. Each movement serves a distinct purpose and has its own musical structure, character, and tempo.

These movements are arranged in a specific order and contribute to the overall narrative and emotional journey of the piece.The first movement of a classical sonata is usually in sonata-allegro form.

characterized by contrasting themes, development, and a recapitulation. It sets the stage for the entire composition and establishes the main musical ideas.

The second movement is often a slower and more lyrical piece, such as an adagio or andante. It provides a contrast to the energetic first movement, allowing for introspection and emotional depth.

The third movement is usually a minuet and trio or scherzo and trio. It serves as a lively and rhythmic interlude, often with a dance-like quality, adding a touch of lightness and playfulness to the sonata.

The final movement, known as the fourth movement, is typically a fast and spirited piece, such as an allegro or presto. It showcases virtuosity, excitement, and brings the sonata to a thrilling conclusion.

Overall, these four movements in a classical sonata provide a diverse and well-balanced musical experience, showcasing the range of emotions, technical skill, and compositional craftsmanship of the era.

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The correct answer is option D gravity is an attractive force between any objects in the universe i.e. gravitational force.

Is gravity a force that draws two items together?

A mass attracts a mass; the amount of the gravitational force is directly proportional to the masses of the two items and inversely proportional to the square of the distance between the two objects. Gravitational force is an attractive force that exists between all objects with mass.

We can see that the gravitational force is inversely proportional to the distance between masses and directly proportional to the product of the masses of two objects. As a result, any item in the cosmos can be attracted to another by the force of gravity.

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Answer: A.

current (thumb) to magnetic field (fingers)

Answer:

A. current (thumb) to magnetic field (fingers)

Explanation:

According to the Right-Hand Thumb rule, if we are holding a current- carrying straight conductor in our right hand such that the thumb points toward the direction of current, then the fingers will wrap around the conductor in the direction of the field lines of the magnetic field.

Hope it helps.

If you have any query, feel free to ask.

Answer:

9653.04 joules

Explanation:

H= 8.2 m

M= 120 kg

G= 9.81 m/s^2

P.E= ?

P.E = MGH

P.E = 120 x 9.81 x 8.2

P.E = 9653.04 joules

The strength of the resulting magnetic field at a distance of 1.25 m from the wire is 4 * 10⁻⁷  Tesla.

The strength of the magnetic field produced by a long power line can be calculated using the formula for the magnetic field produced by a straight current-carrying wire. The formula is given by:

B = (μ₀ * I) / (2π * r)

Where:
- B is the magnetic field strength
- μ₀ is the permeability of free space (a constant value)
- I is the current flowing through the wire
- r is the distance from the wire

In this case, the current flowing through the power line is 125 A, and the distance from the wire is 1.25 m.

Plugging these values into the formula, we get:

B = (4π *  10⁻⁷ T·m/A * 125 A) / (2π * 1.25 m)

Simplifying the expression, we have:

B = (5 * 10⁻⁷ T·m) / (1.25 m)

Now, dividing the numerator by the denominator:

B = 4 * 10⁻⁷  T

Therefore, the strength of the resulting magnetic field at a distance of 1.25 m from the wire is 4 * 10⁻⁷ Tesla.

In conclusion, the main answer to the question is that the strength of the resulting magnetic field at a distance of 1.25 m from the wire is 4 * 10⁻⁷ Tesla.

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A brass axle with a volume of 0.318 cm weighs 2.7g.

Mass in physics is a quantitative representation of inertia, a fundamental property of all matter. Essentially, it relates to a substance's resistance to shifting its direction or speed in reaction to the application of a force.

You would use a balance as the tool to determine mass. The classic balance depicted here could aid in your understanding of what mass is, though you might also use a measuring cylinder or a triple beam balance in the lab to measure mass.

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Answer:

A bar magnet creates a magnetic field around it. The field cannot be seen, but its effects can be observed. This is how the magnetic field around a magnet is detected. Iron fillings can be used to study the presence of magnetic field and a compass can be used to plot the field lines.

Explanation:

Answer:

False

Explanation:

I'm not the most sure but it seems reasonable that it's false

Good Luck Bestie :3

Answer:

The answer is false. If you want why. I will desxribe you.

Answer: 20N

Explanation:

The force of attraction between a 2 C charge and an 8 C charge placed the same distance apart is 20 N.

The force of attraction between two point charges is given by Coulomb's law:

F = k  |q₁ × q₂| / r²

where k is the Coulomb constant, q1 and q2 are the magnitudes of the charges, and r is the distance between the charges.

In the case of a 2 C charge and a 4 C charge attracting each other with 10 N of force, we can solve for the distance between the charges:

r² = k  |q₁ × q₂| / F

r² = k  |2 × 4| / 10

r = √(k |2 × 4| / 10)

Now that we know the distance between the charges, we can calculate the force of attraction between a 2 C charge and an 8 C charge placed the same distance apart:

F = k |2 × 8| / r²

F = k |2 × 8| / (√(k |2 × 4| / 10))² = 20 N

Therefore, the force of attraction between a 2 C charge and an 8 C charge placed the same distance apart is 20 N.

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(A) The wavelength of each of these waves when they are sent through sea water is 0.0126 m and 0.0076 m respectively.

(B) The wavelength of each of these waves when they are sent through freshwater is 0.012 m and 0.0074 m respectively.

(C) The time taken for the echo to return to the ship is 3.97 seconds.

The wavelength of the sound wave in sea water depends on the speed of sound in seawater and frequency of the wave.

The speed of sound in seawater, v = 1,510 m/s

λ = v/f

when the frequency, f = 120 kHz

λ = 1510 / 120,000

λ =  0.0126 m

when the frequency, f = 200 kHz

λ = 1510 / 200,000

λ =  0.0076 m

The speed of sound in freshwater, v = 1481 m/s

when the frequency, f = 120 kHz

λ = 1481 / 120,000

λ =  0.012 m

when the frequency, f = 200 kHz

λ = 1481 / 200,000

λ =  0.0074 m

The time taken for the echo to return is calculated as follows

v = 2d/t

t = 2d/v

t = (2 x 3,000 m) / (1510 m/s)

t = 3.97 s

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Answer:

Mathematical models use the observed composition and mass of the Sun along with the laws of physics to derive equations that describe the gravitational equilibrium, solar thermostat, and rate at which energy moves from the core to the photosphere.

Explanation:

No explanation but your welcome!

Answer:

The weight of the spacecraft is greater on Planet A but the mass is same on both planets.

Mass is same on both planets because mass is always constant which means it doesn't change when place varies.Weight of the spacecraft is more in planet A because it has more value of acceleration due to gravity. (g=GM/R^2)

Thus the first statement is true

Proportional scale or Proportion wheel are terms used to describe the process of preparing illustrations for expansion or reduction.

What is the proportional principle?

The relationship between two or more elements in a design and how they stack up against one another is known as proportion. When there is a proper size or quantity relationship between the elements, proportion is said to be harmonic.

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The purpose of the balloon car project is to demonstrate fundamental principles in physics, specifically Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction.

This project engages students in hands-on learning and encourages creativity in designing and constructing their own balloon-powered cars.The balloon car project involves attaching a partially inflated balloon to a small car made from lightweight materials, such as plastic bottles, cardboard, or foam. When the balloon is inflated and released, the escaping air propels the car forward. This demonstrates how the force exerted by the air leaving the balloon (action) causes an equal and opposite force on the car (reaction), causing it to move. In addition to teaching physics concepts, the balloon car project also fosters critical thinking, problem-solving, and teamwork skills. Students can experiment with different car designs, materials, and balloon sizes to optimize the car's speed and distance traveled. They can also collaborate with classmates, discussing ideas and learning from each other's experiences. Overall, the balloon car project serves as an engaging and interactive way to teach students important scientific concepts and develop essential skills that will benefit them in their future education and career pursuits.

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Answer:

Because (Answer in Explanation)...

Explanation:

...Metal can conduct electricity, and so if they were to touch, there would be an electric current. If the person using the machine touches the case that touches the wire, they may get an electric shock.

To store 2.70x10^-3 J of electrical energy, capacitance c3 in the network must be 2.67μF. This can be calculated using the formula for energy stored in a capacitor network.

A network of capacitors is a collection of capacitors wired into a circuit. The capacitors store electrical energy as an electric field between their plates when a voltage is applied across the network. The formula E = 1/2 * C * V2 may be used to determine the total energy held in a capacitor network, where E is the energy held, C is the network's total capacitance, and V is the applied voltage. The capacitances of c1, c2, and c4 in this instance are specified as 4.00 F, 4.00 F, and 8.00 F, respectively. It is possible to determine that the capacitance c3 has to be 2.67 F to store 2.70 x 10-3 J of electrical energy by rearranging the formula and inserting the numbers.

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A promising evidence of a habitat that might support life on the planet Mars is water.

There is evidence supporting the existence of liquid water on Mars from numerous sources. The finding of repeated black streaks on Martian slopes and the presence of hydrated minerals suggest the potential of seasonal or location-specific briny water flows. A necessary component of life as known is liquid water.

Additionally, Mars possesses underground ecosystems that could provide defence against radiation and severe surface conditions. Researchers have found evidence of ancient underground hydrothermal systems as well as beneath ice. These settings might offer consistent conditions for the development of microbial life.  Methane gas has been found in the Martian atmosphere, along with variations over time, and this has led to questions regarding its origin. Both geological and biological processes can result in the production of methane.

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The height of the cliff is 200 meter where potential energy of the boulder is measured.

Potential energy in physics is the energy that an item retains as a result of its position in relation to other objects, internal tensions, electric charge, or other elements.

The gravitational potential energy of an item, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field are examples of common types of potential energy.

The height of the cliff is = 90,000 ÷ (45 ×10) meter = 200 meter.

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Effective coaching involves addressing critical performance outcomes, is not limited to face-to-face leadership, includes subjective aspects such as attitude, and extends beyond instructional activities.

Effective coaching encompasses more than just focusing on critical performance outcomes. While performance outcomes are important, coaching goes beyond that by considering various aspects of an individual's development. It involves providing guidance, support, and feedback to help individuals improve their skills, knowledge, and overall performance. Coaching can take place in different settings, including face-to-face interactions, but it is not limited to that. With advancements in technology, coaching can also occur through virtual platforms or other remote methods.

Furthermore, effective coaching acknowledges and addresses subjective aspects such as attitude. Attitude plays a crucial role in an individual's performance and can significantly impact their motivation, engagement, and overall success. A skilled coach recognizes the importance of addressing attitudes and helps individuals develop a positive mindset and behavioral patterns conducive to growth and achievement.

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Answer:

Explanation:

For entropy change the formula is

ΔS = ΔQ / T

ΔQ = Δ H

ΔS = Δ H / T

Given

Δ H = + 162.8 kJ

We can take equilibrium temperature as average temperature of the whole process

So, T = 273 + 87 = 360 K

ΔS = Δ H / T

=  162.8 kJ  / 360

= +  0.508 kJ / K .

When the magnitude of the heat transfer for the process is 162.8 kJ, Then the entropy change for the mixing process, in kJ/K is = + 0.508 kJ / K

For The entropy change, the formula is

Then ΔS = ΔQ / T

After that ΔQ = Δ H

Then ΔS = Δ H / T

Given as per question are:

Then Δ H = + 162.8 kJ

Now We can take equilibrium temperature as average temperature of the whole process are:

So, T is = 273 + 87 = 360 K

Then ΔS = Δ H / T

After that = 162.8 kJ / 360

Therefore, = + 0.508 kJ / K.

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Potential and kinetic energy are at play when we talk about Newton's second law of motion through the various positions in relation to the bodies involved.

This law states that force is equal to the rate of change of momentum and is denoted as F = mv where m is mass and v is velocity.

Potential energy is the energy is possessed by a body by virtue of its position while kinetic energy is possessed by a body by virtue of its motion. Both forms of energy are influenced by forces and are equal to the total momentum.

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Mutations occur in the genetic material due to alterations in the sequence of nucleic acids of the genome. Mutations are harmful as they lead to many disorders and conditions which are life-threatening.

A mutation can be defined as an alteration in the sequence of nucleic acids of the genome of a living organism, virus, or the extrachromosomal DNA material such as the mitochondrial DNA or the chloroplast DNA. Viral genomes are different from that of other living organisms as they contain either DNA or RNA as genetic material.

The guanine-thymine (G-T) mutation is the single most common mutation which occurs in the DNA of human. This mutation occurs about once in every 10,000 to 100,000 base pairs in the DNA.

Mutations are of different types. From which, the deletion mutations are opposite types of point mutations. These mutations involve the removal of a base pair from the sequence. Both of these mutations lead to the creation of one of the most dangerous type of point mutations which is known as the frameshift mutation.

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