50ml of water are 20°©was mixed with 100ml of water at 90°,the density of water is about 1g\ml .
determine de final temperature after mixing the sample of water
​

Answer:

Time = 0.317 seconds.

Explanation:

Given the following data;

Distance = 1.65km to meters = 1.65 * 1000 = 1650 meters

We know that the speed of sound in steel is equal to 5200m/s

To find the time to hear the sound of the whistle;

Time = distance/speed

Substituting into the equation, we have

Time = 1650/5200

Time = 0.317 seconds.

Therefore, it will take him 0.317 seconds to hear the sound of the whistle.

From the formula for coulomb's, the formula for k would be k = Fd²/q1q2.

Here, we are required to solve for k from the Coulomb's formula, F=kq1q2/d².

Solving the formula for k, we obtain;

k = Fd²/q1q2

To solve the formula for k, we need to make k the subject of the formula;

F = kq1q2/d²

Then, F × d² = kq1q2

Therefore, to make k the subject of the formula; we divide both sides of the equation by q1q2.

Therefore, k = Fd²/q1q2.

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Complete question

Coulomb's Law is given by the formula

F=kq1q2/d2

The force F between two charges q1 and q2 in a vacuum is proportional to the product of the charges, and is inversely proportional to the square of the distance d between the two charges. Solve the formula for k.

Answer:

law of constant composition and  law of conservation of mass

Explanation:

His theory was all matter is made of atoms are unable to be divided or separated(law of conservation of mass) and all atoms of a certain element are equal in mass and properties(law of constant composition)

8n downwards

since downwards force is greater than upwards just minus

The force will become 1.033 N if the distance between them is increased by a factor of 3.

Let's say that the two charges are q1 and q2, and the initial force between them is F.

According to Coulomb's law, the force between two-point charges is given by:

F = k(q1q2 / r²)

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

If the distance between the charges is increased by a factor of 3, the new distance will be 3r. Therefore, the new force F' will be:

F' = k(q1q2 / (3r)²)= k(q1q2 / 9r²)

Simplifying this expression, we have:

F' = (1/9)F

So the new force between the charges will be 1/9 of the initial force.

Therefore, if the initial force is 9.3 N, the new force will be:

9.3 N × (1/9) = 1.033 N

Therefore, the force will become 1.033 N if the distance between them is increased by a factor of 3.

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Answer:

- Decreasing the resistance

- Using a shorter length

- Using a smaller area wire

Explanation:

Formula for conductance in wires is;

G = 1/R

Where;

G is conductance

R is resistance

This means that increasing the resistance leads to a larger denominator and thus a smaller conductance but to decrease the denominator means larger conductance.

Thus, to increase the conductance, we have to decrease the resistance.

Resistance here has a formula of;

R = ρL/A

Where;

ρ is resistivity

L is length of wire

A is area

Thus, to decrease the resistance, we will have to use a shorter length and smaller area of wire.

In an NP-transistor (NPN transistor), the base is typically made of p-type semiconductor material, while the emitter and collector are made of n-type semiconductor material.

To switch the transistor "ON" and allow current to flow through it, the base-emitter junction needs to be forward-biased. This means that the base terminal should have a higher positive potential than the emitter terminal.

By applying a small positive potential to the base (relative to the emitter) and a large NP-transistor to the collector, the base-emitter junction is forward-biased, allowing current to flow through the transistor and switching it "ON".The correct answer is (A) Applying large negative potential to the collector and small positive potential to the base.

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To find the probability of each defect, we divide the frequency of each defect by the total frequency of all defects.

The probability of each defect is found by dividing the frequency of that particular defect by the total frequency of all defects. The total frequency of all defects is calculated by summing up the frequencies of all the defects. Then, the frequency of each defect is divided by the total frequency to obtain the probability.

For example, to find the probability of Excess adhesive, we divide its frequency (190) by the total frequency of all defects (822). Similarly, we calculate the probability for each defect by dividing its frequency by the total frequency.

These probabilities represent the relative likelihood of each defect occurring out of the total defects observed on the printed circuit board.

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The earliest attempts to carry light through glass fibers were made by researchers who were trying to transmit images through long distances.

This was achieved by using bundles of fibers that were coated with a transparent cladding material to keep the light inside the fibers. These early experiments paved the way for the development of modern fiber optic technology, which is now used in a wide range of applications including telecommunications, medicine, and scientific research. Today, fiber optic cables are capable of transmitting data at incredibly high speeds over very long distances with minimal loss of signal strength.

Researchers aimed to develop a technology that could transmit information more efficiently and with minimal signal loss. They experimented with glass fibers to guide light, as light can carry a vast amount of data at high speeds. This led to the invention of fiber-optic communication systems, which revolutionized the telecommunications industry by providing faster and more reliable data transmission.
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The locust jumped a total distance of 0.750 m at an angle of 55.0°. Using the sine and cosine functions, we can calculate the horizontal and vertical components of the jump.

Angle is a geometric figure formed by two lines or rays diverging from a common point. It is measured in degrees, and is used to indicate the amount of turn between the two lines or rays. Angles are often used in geometry, engineering, and physics to measure the size of objects or the amount of turn in a path. Angles are also used to indicate direction, such as in a compass. In mathematics, angles can be used to calculate the area and volume of shapes, as well as the length of curves.

The horizontal component is 0.666 m and the vertical component is 0.450 m. This means the locust jumped 0.666 m horizontally and 0.450 m vertically.

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Experimental drinking frequently occurs as a result of taste aversion and social pressure.

Peer pressure is the influence or pressure that comes from one's peers. Peers are frequently referred to be members of the same social or age group. Peers often surround themselves with dimwitted or poor self-esteem individuals to do their bidding because they feel the need to be in charge.

Peer pressure has several root reasons, including the need to fit in, low self-esteem, fear of being rejected, and, most often, the desire to feel safe and secure among peers. Peer pressure has the worst results and might have severe impacts. Ages 12 to 19 are when peer pressure is most prevalent. Teenagers sometimes succumb to peer pressure and do things they wouldn't otherwise do.

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The period of oscillation is dependent on the square root of the ratio of the mass (m) and the spring constant (k).

Since m and k are unchanged, doubling the amplitude of oscillation will not affect the period. Therefore, the period remains the same. Expressing this answer to two significant figures, the period is equal to the original period with appropriate units.
When the oscillation amplitude is doubled while mass (m) and spring constant (k) are unchanged, we first need to understand the relationship between period, amplitude, mass, and spring constant.

The period (T) of an oscillation is determined by the formula T = 2π√(m/k), where m is the mass and k is the spring constant. Amplitude, on the other hand, is the maximum displacement of the oscillating object from its equilibrium position. Notice that amplitude is not present in the formula for the period.
Thus, when the amplitude is doubled, it does not affect the period of oscillation. The period remains the same, as it depends only on the mass and spring constant. To express your answer to two significant figures, we would need the numerical values of mass and spring constant. However, since these values are not provided, we cannot calculate the exact period value in this case.
In conclusion, the period remains unchanged when the oscillation amplitude is doubled while m and k are unchanged.

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Answer:

6 types of energy and their transfers are noted:  nuclear, light, chemical synthesis, chemical decomposition, mechanical , potential, and kinetic, along with an explanation.

Explanation:

Each energy transition is noted with a "*#."

1.  Lets start with the solar system's sun.  It is comprised of hydrogen and helium atoms that collide with enough force to join and become different elements.  The nucleus is broken apart and particles rearrange to form a new atom, perhaps berylium.  Some of the energy holding the nucleus together is released in the form of heat and light.  The energy in the nucleus is relesased in a nuclear reaction  *1.

*1  Nucleus of an atom releases energy as heat and light.

----------------

The light from the sun goes all directions.  A portion hits the Earth during the daylight hours.  Life has evolved on Earth to to the point that certain plants and some other organisms can capture the light energy.  Trees are a good example.  The chlorophyll in trees is able to capture the light energy and use it to synthesize compounds such as sugars (photosynthesis).  The energy is used to create the bonds of the elements in a sugar molecule.  *2 The process of photosynthesis makes structural compounds as well as sugars.  The sugars carry the stored chemical energy to other parts of the plant involved with metabolism.  When energy is required, the sugars are metabolized into smaller compounds, releasing the energy from the former chemical bonds.

  *2  Chemical energy contained in chemical bonds

---------

Trees also contain complex polymeric celluloses that are made of of complex molecules with many high-energy bonds.That energy may be released if the wood is burned. *3 A small amount of heat, known as the activation energy (e.g., a match), can cause the bonds to break and release even more heat.  This results in fires, which is the conversion of chemical energy into heat and light.

*3.  Decomposition (sometimes combustion)  is the release of chemical energy as heat and light.

----

The heat from a fire may be used to boil water and make steam.  The ability of steam to create pressure on a piston to create movement is the foundation of the industrial revolution.  This is the conversion of chemical energy to heat and then heat to mechanical motion.  

*4.  Conversion of heat to mechanical motion energy.

Stem engines do many tasks.  One is to raise materials such as structural beams to heights above ground for the construction of building.  The mechanical energy is tranferred into potential energy.  *5 This is the energy contained in an object above Earth's surface.  It can be recovered with the object comes back to Earth, if it were attached to a pulley that is used to lift something.

  *5.  Conversion of Mechanical energy to potential energy

An object above Earth has a potential energy that can be coverted to kinetic energy.  If the object is allowed to drop, the potential energy is conveted into kinetic energy.  *6 Physics and Chemistry have formulas that can precisely predict the speed and trajectory of such objects.  They are based on the value for potential energy being converted to kinetic energy which is the speed of the object.

  *6 Conversion of Potential energy to kinetic energy

Fire (Chemical energy → Heat and Light) Electric lamp (Electrical energy → Heat and Light) Microphone (Sound → Electrical energy) Wave power (Mechanical energy → Electrical energy)

Energy is characterised as having the "ability to accomplish work, which is the capacity to apply a force sufficient to move an object." Despite this unclear definition, the concept is actually quite straightforward energy is just the force that moves objects. Potential and kinetic energy are the two different categories.

It is possible to change the form of energy. Examples Our cars are filled with gasoline (chemical), which, with the aid of electrical energy from a battery, produces mechanical (kinetic) energy. Our TVs are powered by purchased electricity, which is then transformed into light and music.

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Answer:

The answer is revolution

Explanation:

Answer:

type good your question

Answer:

Hello....

Explanation:

Total internal reflection, in physics, complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle.

The conditions required for total internal reflection (TIR) to occur are:

1)the light must be travelling from a more dense medium into a less dense medium (ie glass to air)

2)the angle of incidence must be greater than the critical angle.

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Answer:

140m 13 degree

Explanation:

yan po thank nalang po sa point

To convert centimeters to micrometers, we need to multiply the value by 10,000. Therefore, to convert 2840 centimeters to micrometers:

2840 cm * 10,000 = 28,400,000 μm

Writing this in scientific notation with three significant figures:

28,400,000 μm = 2.84e7 μm.

Micrometers, often abbreviated as μm, are a unit of length measurement in the metric system. One micrometer is equal to one millionth of a meter, which is approximately 0.000001 meters or 0.001 millimeters.

Micrometers are commonly used to measure extremely small distances or the size of microscopic objects. They are particularly useful in scientific research, engineering, manufacturing, and other fields where precise measurements at the microscale are required.

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If the magnitude of one of the charges doubles while the magnitude of the other charge and the distance between the charges remain the same, then the electric force between the charges will also double.

This is because the electric force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Therefore, if the magnitude of one charge doubles, the product of the charges doubles, and the electric force between them also doubles. However, if the distance between the charges remains the same, the square of the distance does not change, so the force is not affected by it. In summary, the electric force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

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The magnitude of the force at the point (1, 2) is 13.

To find the magnitude of the force at a point (1, 2), we need to calculate the negative gradient of the potential energy function. The force vector is given by:

F = -∇U

Where ∇U is the gradient of U.

To calculate the gradient, we need to find the partial derivatives of U with respect to each coordinate (x and y):

∂U/∂x = dU/dx = 21\(x^{6}\) - 8

∂U/∂y = dU/dy = 0

Now we can evaluate the force at the point (1, 2):

F = [-∂U/∂x, -∂U/∂y]

= [-(21\((1)^{6}\) - 8), 0]

= [-13, 0]

Therefore, the magnitude of the force at the point (1, 2) is 13.

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The first time pirates used airplanes in peacetime was to transport letters. Considered to be the founding flight of what would become American Airlines, this flight was the first regularly scheduled flight.

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When the mass is released from rest at the displacement a= 0.59 m, the potential energy stored in the spring is approximately 948.8 Joules.

We know that,

Potential energy (PE) = (1/2) k \(A^2\)

PE = (1/2) * 5701 N/m * \((0.59 m)^2\)

PE ≈ 948.8 J

At the maximum kinetic energy point, all the potential energy is converted into kinetic energy.

The total mechanical energy (E) is conserved throughout the motion, given by the sum of potential energy (PE) and kinetic energy (KE):

E = PE + KE

PE_initial = (1/2) k \(A^2\)

E = 0 + KE_max

(1/2) k \(A^2\) = KE_max

KE_max = (1/2) k \(A^2\)

KE = (1/2) m \(v^2\)

KE_max = (1/2) * 123 kg * \(0^2\)

KE_max = 0

The time required for the mass to reach the equilibrium position can be found using the formula for the period of oscillation of a mass-spring system:

T = 2π √(m/k)

Substituting the given values into the formula:

T = 2π √(123 kg / 5701 N/m)

T ≈ 2.20 s

Therefore, the time required for the mass to reach its maximum kinetic energy for the first time is approximately 2.20 seconds.

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Your question seems incomplete, the probable complete question is:

A massless spring of spring constant k= 5701 N/m is connected to a mass m= 123 kg at rest on a horizontal, frictionless surface. A 20% Part (a) The mass is displaced from equilibrium by A = 0.59 m along the spring's axis. How much potential energy, in joules, is stored in the spring as a result? A 20% Part (b) When the mass is released from rest at the displacement A= 0.59 m, how much time, in seconds, is required for it to reach its maximum kinetic energy for the first time?

The change in momentum is a measure of how much an object's motion has changed. When a force acts on an object, it can make the object move faster or slower, or change the direction of its motion. The amount of this change is called the change in momentum.

In this case, a 15 N force acted on a 1 kg ball for 10 seconds, which means that the force was pushing or pulling on the ball for 10 seconds. This force caused the ball to change its motion and its momentum.

To find out how much the ball's momentum changed, we multiply the force by the time it acted on the ball. So in this case, 15 N (the force) x 10 s (the time) = 150 Ns (change in momentum).

It's important to note that the unit of impulse is Ns.

So, this ball's change in momentum is 150 Ns, it means that the ball's motion changed by 150 Ns due to the force that acted on it for 10 seconds.

Δp = F * t = 15 N * 10 s = 150 Ns

So, the ball's change in momentum is 150 Ns. This is also known as impulse, which is the product of force and time.

1. a. A steel girder, still glowing as it is removed from its mold, would produce a **bright line spectrum**. This is because the intense heat causes the atoms in the steel to emit light at specific wavelengths. The high temperature excites the electrons in the atoms, and as they return to lower energy levels, they emit photons of specific energies, resulting in distinct bright lines in the spectrum.
b. Sunlight shining through our atmosphere (as seen from Earth's surface) would produce a **continuous spectrum**. The sunlight consists of a broad range of wavelengths, covering the entire visible spectrum. As it passes through Earth's atmosphere, which contains various gases, particles, and molecules, these components do not selectively absorb or emit specific wavelengths, resulting in a continuous distribution of colors in the spectrum.
c. The Orion Nebula, a hot, glowing cloud of thin gases, would exhibit an **emission line spectrum**. The gases in the nebula are energized by nearby stars, causing them to emit light at specific wavelengths characteristic of the elements present. The excited electrons in the gas atoms emit photons at discrete energies, creating bright lines in the spectrum corresponding to specific elements or molecular transitions.
2. Three regularities/trends observed in the planets of our solar system that support the solar nebula concept are:
a. **Orbital Plane Alignment**: Most planets orbit the Sun in a nearly flat plane known as the ecliptic. This alignment suggests that the planets formed from a rotating disk of gas and dust, as the rotation of the solar nebula would have caused material to flatten into a disk-shaped structure.
b. **Terrestrial and Jovian Planet Differences**: There is a clear distinction between the inner terrestrial planets (Mercury, Venus, Earth, and Mars) and the outer gas giant planets (Jupiter, Saturn, Uranus, and Neptune). The terrestrial planets are smaller, denser, and composed mainly of rocky material, while the gas giants are larger, less dense, and composed mostly of hydrogen and helium. This supports the idea that the solar nebula had different zones with varying compositions and temperatures, leading to the formation of different types of planets.
c. **Rocky Debris in Inner Solar System**: In the inner solar system, there are numerous rocky asteroids and comets, which are remnants from the early stages of planet formation. These bodies are predominantly found in the asteroid belt between Mars and Jupiter and the Kuiper Belt beyond Neptune. Their presence suggests that rocky material was abundant closer to the Sun, while the outer regions contained more gas and icy material.

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Answer:

The reason you feel weightless is because there is no force pushing against you, since you are not in contact with anything. Gravity is pulling equally on all the particles in your body. This creates a sensation where no forces are acting on you and you feel weightless.

Answer:

12.5

Explanation:

the formula v⁰y=usin∅

therefore substitution of the values

v⁰y= 22sin(35) = 12.5

The radius οf nucleus fe2656 is apprοximately 4.478 femtοmeters.

Tο calculate the radii οf nuclei, we can use the empirical fοrmula fοr nuclear radius:

\(r = r0 * A^{(1/3)\)

where:

r is the radius οf the nucleus

r0 is a cοnstant with a value οf apprοximately 1.2 fm (femtοmeters)

A is the mass number οf the nucleus

Let's calculate the radii fοr the given nuclei:

Fοr nucleus n715:

A = 7 (mass number)

r0 = 1.2 fm

\(r = r0 * A^{(1/3)\)

\(= 1.2 * 7^{(1/3)\)

≈ 1.2 * 1.913

≈ 2.295 fm

The radius οf nucleus n715 is apprοximately 2.295 femtοmeters.

Fοr nucleus u92238:

A = 238 (mass number)

r0 = 1.2 fm

\(r = r0 * A^{(1/3)\)

\(= 1.2 * 238^{(1/3)\)

≈ 1.2 * 6.315

≈ 7.578 fm

The radius οf nucleus u92238 is apprοximately 7.578 femtοmeters.

Fοr nucleus fe2656:

A = 56 (mass number)

r0 = 1.2 fm

\(r = r0 * A^{(1/3)\)

\(= 1.2 * 56^{(1/3)\)

≈ 1.2 * 3.732

≈ 4.478 fm

The radius οf nucleus fe2656 is apprοximately 4.478 femtοmeters.

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