Be sure to answer all parts. Enter your answers in scientific notation.
Calculate the OH^- concentration in an aqueous solution at 25 Degree C with an H_3O^+ concentration of 1.63 x 10^-4 M.
.....*10^ .....M
The value of K_w at 50 Degree C is 5.48 x 10^-14. Calculate the OH^- concentration from the above solution at 50 Degree C.
......*10^.....M

Answer:

umm im confused

Explanation:

Answer:

larger mass more the molecule more heat absorbed

and vice versa .Thats the reason ok?

Answer:

friction doesn't let the desk move.

Explanation:

the law of motion states any object in motion should stay in motion.

Answer:

1 g/cm³

Explanation:

1 kg = 1000 g

1 cm = 0.01 of a meter

1 m³ = 100 cm * 100 cm * 100 cm = 1,000,000 cm

1,000 kg / 1 * 1000 g / 1 kg

^ divided by 1,000,000 cm

1,000,000 divided by 1,000,000 = 1 g/cm³

The wavelength emitted in the transition from level U to level L is 1615 A°, a four-level laser system.

The energy level between the energy levels U 0.820 eV to level L 0.051 eV,

E = E₂ - E₁

  = 0.820 - 0.051

 = 0.769 eV

The difference between energy levels, E is 0.769 eV.

The energy,

E = hc / λ

Energy (E) = 0.769 eV

h (Planck's constant) = 6.626 ×10⁻³⁴

c (speed of the light) = 3×10⁸ m/s

λ (wavelength) =?

λ = hc / E

 = (6.626 ×10⁻³⁴ × 3×10⁸ m/s) / 0.769 eV

 = (6.626 ×10⁻³⁴ × 3×10⁸ m/s) / (0.769×1.6×10⁻¹⁹)

 = (1.9878×10⁻²⁵) / (1.2304×10⁻¹⁹)

 = 1.6155×10⁻⁶

= 1615 ×10⁻¹⁰

= 1615 A°

The wavelength of radiation emitted in the transition from level U to

level L, 1615 A°.

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Answer:

1) They are electrically neutral

2) They have slightly more weight than protons

Explanation:

The given atomic particle found in the nucleus has the following characteristics;

The location of the particle = The nucleus

The (numbers of the) particle does not contribute to (change) the atomic number of the element

The particles found within the nucleus of an atom are; Neutrons and protons

The particle within the nucleus that determines the atomic number = The number of protons

Therefore, the particle referenced in the question is the neutrons

The two characteristics of the neutron are;

1) The neutrons are neutral, electrically

2) Neutrons have slightly more weight than protons

3) Neutrons are magnetic

4) Neutrons are very small

5) Neutrons consist of three quarks; One 'Up', and two 'Down' quarks

Therefore, two characteristics of the particle are;

1) They are electrically neutral and 2) They are slightly heavier than protons.

Answer:

c

Explanation:

A shift inward of the production possibilities curve signifies that: C. The available production resources have decreased, so potential production levels will decrease.

A production possibilities curve (PPC) is also referred to as production possibilities frontier (PPF) and it can be defined as a curve that illustrates the maximum (best) combinations of two (2) products which can be produce in an economy if they both depend on these two (2) main factors;

Basically, the production possibilities curve (PPC) illustrates the maximum combinations of goods that are available with fixed technology and resources.

Furthermore, an inward shift of the production possibilities curve (PPC) signifies that the available resources used for production have decreased, so potential production levels would also decrease.

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Answer:

To the Left

Explanation:

If the width of the slit in a single-slit diffraction experiment is increased, the central maximum (also known as the central bright fringe) will become narrower.

In a single-slit diffraction pattern, the central maximum is the brightest and widest region of the pattern. It corresponds to the zeroth order maximum, where the diffracted waves from different portions of the slit interfere constructively.

When the width of the slit is increased, the diffracted waves from different portions of the slit spread out over a wider range. This spreading leads to increased interference and overlapping of the waves, resulting in a narrower central maximum.

Conversely, if the width of the slit is decreased, the central maximum becomes wider because the diffracted waves from different portions of the slit interfere over a smaller range, resulting in a broader central maximum.

Therefore, If the width of the slit in a single-slit diffraction experiment is increased, the central maximum (also known as the central bright fringe) will become narrower.

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i) An electromagnetic motor can be made stronger by focusing on three key aspects: increasing the current, using more wire turns in the coil, and employing a better core material.

ii) These principles can be applied in various ways. For instance, electric vehicles and public transportation systems benefit from stronger electromagnetic motors, as they provide improved efficiency and torque.

Firstly, increasing the current running through the wire will amplify the strength of the electromagnetic field. This can be achieved by utilizing a higher voltage power source or reducing the resistance in the circuit.

Secondly, incorporating more wire turns in the coil can enhance the electromagnetic field generated by the electromagnet. The additional turns strengthen the field, which in turn increases the motor's overall power.

Lastly, using a core material with high magnetic permeability, such as soft iron or ferrite, will help concentrate the magnetic field and boost the motor's effectiveness. The core material must be easily magnetized and demagnetized, allowing the electromagnet to rapidly switch poles as needed for optimal performance.

In the medical field, magnetic resonance imaging (MRI) machines use powerful electromagnets to generate detailed images of the body, which aids in diagnosis and treatment. Furthermore, enhanced electromagnetic motors in industrial machinery can lead to increased productivity and reduced energy consumption.

By optimizing these factors, we can create stronger electromagnetic motors and harness their capabilities to improve multiple aspects of our daily lives.

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none of the above. According to Newton's third law of motion, for every action, there is an equal and opposite reaction.

In this case, if Joshua is attracted toward Earth by a 500 N gravitational force, then by Newton's third law, Earth is also attracted toward Joshua with an equal and opposite force of 500 N. The gravitational force between two objects is always mutual and equal in magnitude but opposite in direction.

Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that when an object exerts a force on another object, the second object exerts an equal and opposite force on the first object. The forces always occur in pairs and act on two different objects.

For example, if you push against a wall with a certain amount of force, the wall pushes back on you with an equal amount of force in the opposite direction. Another example is the propulsion of a rocket. The rocket pushes exhaust gases backward, and in response, the gases push the rocket forward with an equal force.

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If a person weighs 670 N on Earth, their weight on the surface of a neutron star that has the same mass as our sun and a diameter of 16.0 km would be 9.26 x 10^12 N.

To find out, we'll need to use the formula for surface gravity: g = (GM)/r²

where: g is surface gravity in N/kg, G is gravitational constant in Nm²/kg², M is the mass in kilograms, r is the radius in meters.

First, we'll need to find the mass of the neutron star using the mass of the sun, which is Ms = 1.989 x 10³⁰ kg.

M = Ms = 1.989 x 10³⁰ kg

The radius of the neutron star is 16.0 km or 16,000 m. r = 16,000 m

Now we can plug these values into the surface gravity formula:

g = (GM)/r²g = [(6.674 x 10^-11 Nm²/kg²)(1.989 x 10³⁰ kg)]/(16,000 m)²g = 1.15 x 10^12 N/kg

Finally, to find the weight of the person on the surface of the neutron star, we'll multiply their mass by the surface gravity:

weight = mgweight = (670 N)/(9.81 m/s²)weight = 68.27 kg

weight on neutron star = (68.27 kg)(1.15 x 10^12 N/kg)

weight on neutron star = 9.26 x 10^12 N

Therefore, the weight of the person on the surface of a neutron star that has the same mass as our sun and a diameter of 16.0 km would be 9.26 x 10^12 N.

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11.The time at 75° East longitude would be 1 hour and 20 minutes behind. 12.The time at 135° degrees East longitude would be 4 hours ahead. and 13. the time in Lima, Peru (15° South latitude, 75° West longitude) would also be 9:30 AM.

At 2:00 AM at 90° East longitude, the time at 75° East longitude would be 1 hour and 20 minutes behind. This is because for every 15 degrees of longitude, there is a time difference of approximately 1 hour. Since the two longitudes in question have a difference of 15 degrees, we can divide this by 15 to calculate the time difference.

If it is 8:00 PM at 15° East longitude, the time at 135° East longitude would be 4 hours ahead. Similarly, for every 15 degrees of longitude, there is an approximate time difference of 1 hour. Since the two longitudes in question have a difference of 120 degrees, we can divide this by 15 to calculate the time difference.

There is a 7-hour difference** between 105° West longitude and the Prime Meridian (0° longitude). The Prime Meridian, passing through Greenwich, England, serves as the reference point for determining time zones. As one moves westward from the Prime Meridian, each 15 degrees of longitude corresponds to a time difference of approximately 1 hour. Therefore, the time at 105° West longitude would be 7 hours behind the time at the Prime Meridian.

If it is 9:30 AM in New York (41° North latitude, 75° West longitude), the time in Lima, Peru (15° South latitude, 75° West longitude) would also be 9:30 AM. The latitude does not affect the time difference between the two locations. However, since both locations have the same longitude (75° West), they would experience the same local time. The time difference between different latitudes is primarily significant for determining time zones rather than the actual time within a specific time zone.

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Centripetal acceleration is the acceleration directed toward the centre of the circular path and is given by the equation a = v^2/r, where v is the velocity and r is the radius of the circular path. Centripetal acceleration is always perpendicular to the velocity vector.

The angle formed between the vectors of centripetal acceleration and centripetal force is 90 degrees . Centripetal force, on the other hand, is the force that acts inward toward the centre of the circular path to keep an object in a circular motion. It is given by the equation F = m*a, where m is the mass of the object. Centripetal force is also directed toward the centre of the circular path. Since both centripetal acceleration and centripetal force are directed toward the centre of the circular path, they are perpendicular to each other. Therefore, the angle between the vectors of centripetal acceleration and centripetal force is 90 degrees.

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We observe a demonstration of Newton's third law of motion in microgravity. Astronaut Mark Vande Hei, who has a mass of 60 kg, pushes a basketball that has a mass of 0.6 kg. The basketball moves away from him at a speed of 2 m/s. According to the law of action and reaction, the astronaut also moves in the opposite direction, but with a much smaller speed due to his larger mass.

Newton's third law is one of the laws of motion put forward by Sir Isaac Newton in 1686. This law states that for every action force exerted by an object on another object, there is an equal and opposite reaction force exerted by another object on first thing .

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The E field associated with a ball is radial with magnitude 1x\(10^{6}\) N/C. The value of the force experienced by the test charge is 4 * \(10^{-3}\) N (newtons).

To calculate the value of the force experienced by the test charge, we can use the formula:

F = q * E

Where F is the force, q is the charge, and E is the magnitude of the electric field.

Given:

Magnitude of the electric field (E) = 1x\(10^{6}\) N/C

Test charge (q) = 4 nC (4 * \(10^{-9}\) C)

Substituting the values into the formula:

F = (4 * \(10^{-9}\)  C) * (1x\(10^{6}\) N/C)

F = 4 * \(10^{-9}\)  * 1x\(10^{6}\) N

F = 4 * \(10^{-9}\)  * \(10^{6}\) N

F = 4 * \(10^{-9}\)  * \(10^{6}\)N

F = 4 * \(10^{-3}\) N

Therefore, the value of the force experienced by the test charge is 4 * \(10^{-3}\) N (newtons).

The question is '' If the E field associated with a ball is radial with magnitude 1x\(10^{6}\) N/C, calculate the value of the force if the test charge is 4nC ''.

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Answer:

C. Nucleus

Explanation:

The nucleus, formed by a nuclear membrane around a fluid nucleoplasm, is the control center of the cell. Threads of chromatin in the nucleus contain deoxyribonucleic acid (DNA), the genetic material of the cell.

have a good day and here’s a funny comic just for fun! :)

We will use the formula of the law of Ohm

where V is the voltage, R the resistance, I is the current

in our case

V=1.5V

Because the resistors are in serie

R = 3+5= 8 ohms

we substitute the values

therefore the answer is D.

The treatment most likely to use is Superficial External bean Radiation Therapy. Then the correct option is B.

The electromagnetic spectrum consists of the range of all types of EM radiation. Radiation is a packet of energy that travels and spreads out.

It has radio waves, infrared waves, visible light waves, ultraviolet rays, and microwaves.

They possess high energy even to penetrate deep within the material. the electromagnetic spectrum has a longer wavelength and less frequency.

Haley noticed a small spot on her skin that turned out to be skin cancer.

Surgery, radiation, chemotherapy, and hormone therapy can all be used to relieve signs and symptoms.

Medications may relieve symptoms such as pain and shortness of breath. Palliative treatment can be used.

The treatment most likely to use is Superficial External bean Radiation Therapy.

Then the correct option is B.

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Answer:

Because trucks usually weight a lot more than cars, thus there is more weight on the front wheels, making them harder to turn do to increased friction.

2269 × 10-³ m can be written in scientific notation as follows: 2.269 × 10⁰.

Scientific notation is a method of writing, or of displaying real numbers as a decimal number between 1 and 10 followed by an integer power of 10.

It is an alternative format of such a decimal number immediately followed by E and an integer.

According to this question, 2269 × 10-³ metres is to be converted to scientific notation. We do this by shifting the decimal place backwards three times to obtain the following;

2.269 × 10⁰

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Answer:

In series

Explanation:

Ammeter is used in electric circuits to measure the amount electric current that passes through the circuit.

Now, as a rule, this ammeter is always connected in series with the wires in the circuit where the current is being measured so that sufficient current can pass through it.

Answer:

See explanation

Explanation:

To find out the electronic structure of each element, you must know the number of electrons it contains.

If you find that out(the number of electrons in the neutral atom of an element is the same as its atomic number). Then you arrange those electrons in such a way that the first shell has only two electrons and subsequent shells have eight electrons.

Look up the groups to which the elements belong in the periodic table All the elements are in group 1 so the last shell must have only one electron.

Answer:

The two types of biogenous sediments are calcareous ooze and siliceous ooze

Explanation:

A condition in which incoming light focuses behind the retina, leading to difficulty focusing on close-up objects, common in older adults, in whom the lens becomes less elastic, is known as presbyopia.

Presbyopia is a vision problem associated with ageing that impairs the capacity to clearly see objects in close proximity. Presbyopia, a disorder where the near point of accommodation moves farther distant, affects many order individuals. It happens as a result of the eye's normal ageing process, notably the lens's loss of flexibility.

Blurred vision is brought on by the eye's inability to focus on close-up things as the lens loses elasticity. Presbyopia is a common eyesight issue that commonly manifests around the age of 40 and worsens as people age. Reading glasses, bifocals, or contacts made specifically for presbyopia can all be used to treat it.

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The charge on each capacitor is:
Q1 = 90μC
Q2,3 = 66.6μC
Q4 = 143.4μC

To find the equivalent capacitance between points a and b, we need to analyze the circuit and simplify it using equivalent capacitance formulas.
Starting with the capacitors in parallel, C2 and C3 are connected in parallel across the voltage source. Their equivalent capacitance can be calculated as:
C2C3 / (C2 + C3)= 8μF * 10μF / (8μF + 10μF)= 4.44μF (rounded to two decimal places)
Next, we can simplify the circuit by replacing C2 and C3 with their equivalent capacitance of 4.44μF. Now, we have two capacitors in series (C1 and the equivalent capacitance of C2 and C3). The equivalent capacitance of capacitors in series can be calculated as:
C1(C2C3 / (C2 + C3)) / (C1 + C2C3 / (C2 + C3))= 6μF(4.44μF) / (6μF + 4.44μF)= 2.56μF (rounded to two decimal places)
Therefore, the equivalent capacitance between points a and b is 2.56μF.
To calculate the charge on each capacitor, we can use the formula Q = CV, where Q is the charge, C is the capacitance, and V is the voltage across the capacitor. Since we know the equivalent capacitance and voltage across the circuit (ΔV a​ b=15.0V), we can calculate the charge on each capacitor.
Starting with C1, its charge can be calculated as:
Q1 = C1ΔV a​ = 6μF * 15.0V= 90μC

Moving on to the capacitors in parallel (C2 and C3), they have the same voltage across them and can be treated as a single capacitor with the equivalent capacitance we calculated earlier. The charge on this equivalent capacitor can be calculated as:
Q2,3 = C2C3ΔV a​ b

= 4.44μF * 15.0V
= 66.6μC
Finally, we can use the fact that the charge is conserved in the circuit (i.e. the total charge on the circuit is the same as the sum of charges on each capacitor) to find the charge on C4. It can be calculated as:
Q4 = Qtotal - Q1 - Q2,3
= 300μC - 90μC - 66.6μC
= 143.4μC
Therefore, the charge on each capacitor is:
Q1 = 90μC
Q2,3 = 66.6μC
Q4 = 143.4μC

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Rusty Schweickart said that astronauts on the international space station (ISS) orbit the Earth every 90 minutes.

Finding the conditions that led to Earth's formation around other stars could mean that habitable planets could be forming elsewhere in the universe.

How far do we have to rewind the clock to the beginning of our solar system? About 4.6 billion years.

Our Earth started out as a ball of dust and gas.

The same process that started our solar system formation is happening 7,000 light-years away in the Orion Nebula.

To compress the gas and dust into dense stars and planets, takes a supremely powerful event, supernova explosion is needed.

Super-heated plasma blasts into space at millions of miles per hour following a supernova.

A host of different factors have to line up to get a planet just like the Earth. What 3 things does Professor Krauss say you have to have? The right size, the right distance from the sun, and the right kind of atmosphere.

Gravity is a powerful force. But specks of dust are far too small to pull on each other to form planets.

Launching a half ton canister at over 100 miles an hour gives the dust particles just enough gravity.

The Germans think that the force that binds the dust particles together is electrostatic force.

Turning dust balls into rocks takes a whole new process. A cosmic ray collision.

Eventually the planetesimals (baby planets) get to the size of asteroids, kilometers across.

Baby Earth is now the size of a few city blocks. Big enough for a new force to take charge. That force is gravity.

So this formation process which was taking a long time to get to size where gravity kicks in, suddenly gets kicked into overdrive and the protoplanet grows very rapidly.

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Answer:

D). Insulator —> semiconductor —> conductor—> superconductor

Explanation:

The sequence list of types of materials in order from least conducive to the most conductive is: the insulator, semiconductor, conductor, and superconductor. Conductors are materials where electric current can flow freely; whereas, in insulators, electric current cannot. Examples of conductors are metals and water. Examples of insulators are plastics, papers, and rubbers.

Answer:

ya its D

Explanation:

Explanation:

CON EL TEOREMA DE PITÁGORAS

v = \(\sqrt{(12 km/h)^{2} + (25 km/h)^{2}}\) = 27.7 km/h

George Darwin, the son of Charles Darwin, indeed predicted that the moon is receding from the earth. Recent measurements have confirmed that he was correct! The current rate of recession is estimated to be approximately 3.8 centimeters per year.

This is caused by the tidal forces exerted by the moon on the earth's oceans, which causes a transfer of momentum from the earth's rotation to the moon's orbit.

This recession is caused by the tidal interactions between the Earth and the Moon. As the Earth rotates, its tidal bulges, created by the Moon's gravitational pull, are slightly ahead of the Moon due to the Earth's rotation. This causes the Moon to be pulled forward, which adds energy to the Moon's orbit and causes it to slowly move away from the Earth

This transfer of momentum causes the moon to gradually move away from the earth. I hope that helps!
This recession is caused by the tidal interactions between the Earth and the Moon. As the Earth rotates, its tidal bulges, created by the Moon's gravitational pull, are slightly ahead of the Moon due to the Earth's rotation. This causes the Moon to be pulled forward, which adds energy to the Moon's orbit and causes it to slowly move away from the Earth.

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