why the center of Newton rings is dark?​

Answer:

180000N

Explanation:

Given parameters:

Acceleration  = 600m/s²

Mass  = 300kg

Unknown:

Force  = ?

Solution:

From Newton's second law of motion;

    Force  = mass x acceleration

Force  = 300 x 600 = 180000N

Part A: The radius of curvature of the lens surface is approximately 3.17 m. Part B: The focal length of the lens is approximately 1.59 m.

Part A:

To find the radius of curvature of the lens surface, use the formula for the radius of the nth bright ring in a planoconvex lens:

r = √(n × λ × f),

where r = radius of the nth bright ring, λ = wavelength of light, and f = focal length of the lens.

In this case, n = 42 (since the last bright ring is observed at the edge), λ = 580 nm (converted to meters, so λ = 580 × 10⁻⁹ m).

Rearranging the formula, solve for f:

f = r² / (n × λ).

Plugging in the values:

f = (0.021 m²) / (42 × 580 × 10⁻⁹ m).

Calculating this expression gives:

f = 3.17 m.

Therefore, the radius of curvature of the lens surface is approximately 3.17 m.

Part B:

The focal length of the lens can be determined using the formula:

f = R / 2,

where R = radius of curvature.

Plugging in the value for the radius of curvature obtained in Part A:

f = 3.17 m / 2.

Calculating this expression gives:

f = 1.59 m.

Therefore, the focal length of the lens is approximately 1.59 m.

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According to the information, we can infer that the correct sentence is: A mosquito flying with a velocity of 5 m/s (option C).

Momentum is a term that refers to a physical property of moving objects. Momentum is a measure of the amount of motion a moving object has and is related to the mass and velocity of the object.

Based on the above, we can infer that the correct option is correct because the fly would have more momentum than the other objects because its mass is less W

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The correct answer is C. quarks and leptons. Quarks and leptons are the two main categories of elementary particles in the Standard Model of particle physics. Quarks are particles that make up protons and neutrons, while leptons include particles such as electrons and neutrinos.

These particles are characterized by their spin, which can be either half-integer or integer, and their mass, which can vary greatly between particles. While flavor and color are also properties that particles can have, they are not as fundamental as quarks and leptons and do not categorize all particles.

Matter and antimatter are also not comprehensive categories, as they only describe particles and their corresponding antiparticles.

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Answer:

West

Explanation:

This is because the first caar has more mass

The star is moving away from Earth at a velocity of 1.8 x 106 m/s.

The Doppler Effect describes the shift in wavelength of a wave when the source is moving in relation to the observer. The shift can be observed in sound waves, light waves, and other waves.

The Doppler Effect can be used to determine the velocity of objects moving away from an observer, as in the case of stars moving away from Earth.

The velocity of a star moving away from Earth can be determined using the equation:

v = Δλ/λ x c, Where v is the velocity of the star, Δλ is the shift in wavelength of the spectral line, λ is the wavelength of the spectral line measured in the lab on Earth, and c is the speed of light (3.00 x 108 m/s).

In this case, the shift in wavelength of the spectral line is Δλ = 500.3 nm - 500 nm = 0.3 nm.

The wavelength of the spectral line measured in the lab on Earth is λ = 500 nm.

Plugging in these values to the equation above: v = Δλ/λ x cv = (0.3 nm / 500 nm) x (3.00 x 108 m/s) = 1.8 x 106 m/s.

Therefore, velocity of star 1.8 x 106 m/s.

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Answer:

Loam is 40% sand, 40% silt, and 20% clay

Explanation:

When the magnification of a compound microscope is increased from 10x to 100x, the field of view will decrease.

The field of view refers to the area or extent of the specimen that can be observed through the microscope. It is determined by the combination of the magnification and the size of the objective lens.

When the magnification of a compound microscope is increased, it means that the specimen is being enlarged more. As a result, the field of view becomes smaller because the microscope is focusing on a smaller area of the specimen.

Magnification is achieved by adjusting the objective lens of the microscope. By increasing the magnification from 10x to 100x, the objective lens is adjusted to provide a higher level of magnification, leading to a narrower field of view.

It is important to note that as the magnification increases, the level of detail and resolution also improve, allowing for a closer and more detailed examination of the specimen. However, the trade-off is a reduced field of view, which limits the area that can be observed at once.

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A shadow zone occurs for P-waves because P-waves refract as they go through the outer core, following a curved path through the mantle, and they do not travel through the outer core.

In more detail, P-waves are generated during earthquakes and propagate through Earth's layers. When they reach the outer core, which is liquid, their speed decreases, causing them to refract or bend.

This refraction creates a curved path through the mantle, leading to an area on Earth's surface where P-waves are not detected, known as the shadow zone. The shadow zone occurs between approximately 103 and 142 degrees from the earthquake's epicenter.

P-waves can still be detected beyond this range because they refract again as they exit the outer core, returning to a more direct path. The fact that P-waves do not travel through the outer core contributes to the formation of the shadow zone, as their energy is not transmitted through this layer.

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The given statement "gases diffuse because of differences in partial pressures from areas of higher pressure to areas of lower pressure." is True because in areas with higher pressure, the gas molecules are more densely packed and push against each other, creating pressure. In areas with lower pressure, the molecules have more room to move around, leading to diffusion.

This pressure is then transferred to other areas with lower pressure, causing the molecules to move and spread out. This is known as the principle of diffusion, and it explains why gases diffuse from areas of higher to lower pressure. When two areas of gas with different pressures come in contact, the molecules will mix until both areas have the same partial pressure. Diffusion is an important process that helps to maintain equilibrium in nature.

It is responsible for the circulation of air, the spread of pollutants in the environment, and the distribution of temperature in a closed environment. The principle of diffusion is also used in industrial processes such as the production of chemicals and foods. Overall, diffusion is an important process that is responsible for the mixing and circulation of gases in the atmosphere. It is caused by differences in partial pressure between areas of higher and lower pressure, and it helps to maintain equilibrium in nature.

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The true statements about exomoons are:

A. Exomoons are likely to exist

D. Exomoons have been used as locations within science fiction stories

C. Exomoons must be only made of ice

A. Exomoons are likely to exist: It is believed that exomoons could exist in planetary systems beyond our own. While the detection and confirmation of exomoons remains a challenge, their existence is considered plausible based on the understanding of moon formation and the prevalence of exoplanets.

D. Exomoons have been used as locations within science fiction stories: Exomoons, being a fascinating concept, have captured the imagination of science fiction writers. They have been depicted in various stories and movies as intriguing and potentially habitable worlds.

E. Exomoons are moons that orbit exoplanets: An exomoon refers to a moon that orbits an exoplanet, which is a planet outside our solar system. Just like moons in our own solar system, exomoons are expected to orbit exoplanets, providing additional complexity and dynamics to the planetary systems.

C. Exomoons must be only made of ice: This statement is not true. Exomoons can be composed of various materials depending on their formation and composition. While some exomoons could have icy surfaces or subsurface oceans, others may be rocky or have diverse compositions.

It is important to note that our understanding of exomoons is still limited, and further research and observations are required to confirm their existence and study their characteristics.

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The most energy-efficient and quickly evolving type of lighting technology available today is the light-emitting diode (LED). High-quality LED bulbs outperform other types of illumination in terms of lifespan, toughness, and light quality.

A typical incandescent source emits around 2% of its energy as usable visible light and the rest 98% as waste heat. Incandescent light bulbs are prone to burning out frequently and need to be replaced annually.

Incandescent light bulbs use electric current to heat a filament until it begins to emit electromagnetic radiation, which is how they turn electricity into light. Because to the filament's high resistance, as current flows through it, its temperature rises until it lights.

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A helicopter is a type of aircraft which uses spinning blades ( wings) to fly .

Force which does work on the boulder is the force applied by the person, weight force, and frictional force.

When a person rolls a heavy spherical boulder up a moderately sloped incline at a constant speed, the following forces do work on the boulder:
1. Applied force from the person pushing on the boulder: This force is exerted by the person to overcome the opposing forces and move the boulder up the incline. Since it acts in the direction of the boulder's motion, it does positive work on the boulder.
2. Weight force due to gravity: The weight force acts vertically downward and always opposes the motion of the boulder up the incline. As a result, it does negative work on the boulder.
3. Friction force between the boulder and the inclined surface at the point of the no-slip contact (responsible for the rolling motion): This force opposes the sliding motion of the boulder and provides the necessary torque for the rolling motion. Since the friction force has a component acting along the direction of motion, it also does positive work on the boulder.
The normal force between the boulder and the inclined surface at the point of the no-slip contact does not do work on the boulder, as it acts perpendicular to the direction of motion.

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When you rub your hands together, the energy transformation that occurs is mechanical energy to heat energy. Therefore, the correct option is A.

Mechanical energy to heat energy. Energy is the capacity to do work or move an object. There are several forms of energy, such as mechanical energy, electrical energy, chemical energy, and heat energy. When energy is transformed from one form to another, the law of conservation of energy states that the total amount of energy in the system remains constant.

Mechanical energy is the energy associated with an object's movement or position. Rubbing your hands together is a physical movement that requires energy to be used, and that energy is then transformed into heat energy, which causes your hands to warm up. Thus, when you rub your hands together, the energy transformation that occurs is from mechanical energy to heat energy.

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The testes are the primary male reproductive organs responsible for producing testosterone.

Vas Deferens: Also known as the ductus deferens, it is a muscular tube that carries mature sperm from the epididymis to the ejaculatory ducts.

Seminal Vesicles: These glands produce a fluid rich in fructose and other nutrients, which helps nourish and provide energy to the sperm.

Prostate Gland: It is a walnut-sized gland that produces a milky fluid containing enzymes, proteins, and other substances that contribute to se men formation.

Cowper's Glands: These small glands secrete a clear, alkaline fluid that lubricates the urethra and neutralizes any acidic urine remnants, creating a favorable environment for sperm.

Urethra: This is a tube that runs  serves as a passage for both urine and semen, though not at the same time.

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Answer:

trying to push a rock that never moves

Explanation:

let me try my best to break the concepts down for you.

the definition of work done is

work done by a constant force on an object is the product of the force and the distance moved by the object in the direction of the force.

this means that when you apply a force, it must move.

basically it is like holding a book in your hands and not moving, are you fighting the gravitational force?

when you push a box, it definitely moves in the direction you push right?

when you raise the barbel, you are applying a upward force, and barbel us moving upwards, so work is done

hope it helps, if not please report it so that someone else gets to try it

Athletes are asked to immediately squat to a depth of their choosing and then jump as high as they can in the Countermovement Jump (CMJ), a vertical jump test.

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Complete Question

A student bikes to school by traveling first dN = 0.900 miles north, then dW = 0.300 miles west, and finally dS = 0.100 miles south.

Similarly, let d⃗ W be the displacement vector corresponding to the second leg of the student's trip. Express d⃗ W in component form.

Express your answer as two numbers separated by a comma. Be careful with your signs.

Answer:

The value is  \(dT  =  ( -0.3,  0.8)\)

Explanation:

From the question we are told that

   The first displacement is  \(dN  =  0.900 \  due  \  North\) i.e positive  y-axis

   The  second displacement is  \(dW =  0.300 \  miles  \  due \  west\) i.e negative  x-axis

   The final displacement is  \(dS =  0.100 \  miles \ due \ south\) i.e  negative  y-axis

Generally dW in component for is  

      \(dW =  (-0.3 ,  0)\)  

Generally the  total displacement of the student is mathematically represented as

     \(dT  =  ( -0.3,  (0.90 - 0.10))\)

      \(dT  =  ( -0.3,  0.8)\)

Answer:

Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle. Regions where this process occurs are known as subduction zones.

Answer:

Tt can be calculated by copy

The acceleration of the car at impact is 15m/s².

Newton's second law provides a precise explanation of the modifications that a force can make to a body's motion. According to this, a body's momentum changes at a rate that is equal to the force acting on it over time in both magnitude and direction. A body's momentum is equal to the sum of its mass and velocity. Similar to velocity, momentum has both a magnitude and a direction, making it a vector quantity.

acceleration - rate of change of velocity with time, both in terms of speed and direction. A point or object going straight forward is accelerated when it accelerates or decelerates.

There are three types of accelerated motions :

express all the units in their most basic form.

kg, newton = kg*m/s², acceleration =m/s²

\(\frac{ 30000 kg*m/s^{2} }{ 2000 kg} = 15m/s^{2}\)

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Answer:

Metamorphic

Explanation:

Metamorphic rocks form when rocks are subjected to high heat and high PRESSURE.

International space station is the mission of NASA. It has launched 134 successful space missions.

International space station is a huge place in the space but in the close orbit with all possible facilities for astronauts , scientists and others

The National Aeronautics and Space Administration (NASA) is an acronym for the National Aeronautics as well as Space Administration. NASA was established as a division of the United States government on October 1, 1958. NASA is just in charge of all research and technology related to aviation and space in the United States.

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as a blade? murcury because it stays liquid at room temp. it would be a puddle with a hanfle which is like... really dull

when driving at 35 mph, you should maintain a following time of at least 2 to 3 seconds between your vehicle and the one in front of you to ensure safe driving conditions. This translates to approximately 102 to 153 feet.

The recommended following distance when driving at 35 mph is typically two to three seconds. Following distance refers to the space between your vehicle and the vehicle in front of you, and it's important to maintain a safe distance to prevent collisions and allow for reaction time in case of sudden stops or changes in traffic conditions.

To determine the appropriate following distance, you can use the "two-second rule." This rule involves choosing a stationary object on the road, such as a sign or a tree, and counting the number of seconds it takes for your vehicle to reach that object after the vehicle in front of you passes it.

If it takes less than two seconds, you should increase your following distance.

At 35 mph, two seconds translates to approximately 102 feet (31 meters), and three seconds translates to approximately 153 feet (47 meters). However, it's important to note that the following distance can be affected by various factors such as weather conditions, road conditions, and the size and weight of your vehicle.

It's also important to remember that maintaining a safe following distance is just one aspect of safe driving. Other important safe driving practices include staying alert and focused, obeying traffic laws and signals, and adjusting your driving to the current conditions. By following these practices, you can help keep yourself and others safe on the road.

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To initiate a chain reaction in a nuclear reactor, metal fuel rods, typically made of uranium or plutonium, must be bombarded with neutrons.

When a neutron collides with a fissile atomic nucleus in the fuel rod, it can cause the nucleus to split or undergo fission. This fission process releases a large amount of energy in the form of heat and radiation, as well as additional neutrons.

These newly released neutrons can then collide with other fissile nuclei, causing them to also undergo fission and release more energy and neutrons. This self-sustaining series of reactions is called a chain reaction.

To control the rate of the chain reaction and prevent it from becoming too rapid or uncontrollable, control rods made of materials that absorb neutrons, such as boron or cadmium, are used.

By adjusting the position of these control rods, operators can regulate the number of neutrons available to cause further fission reactions, allowing for safe and efficient energy production in the nuclear reactor.

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Answer:

1120

Explanation:

power =force ×velocity

=700*1.6=1120