a water pipe having 2.5 cm inside diameter carries water into the basement of a house at a speed of 0.90 m/s and a pressure of 170 kpa. if the pipe tapers to 1.2 cm and rises to the second floor 7.6 m above the imput point, what are the a) speed at the second floor? b) water pressure at the second floor?

Answer: body composition is the proportion of fat and non fat mass in your body.

Explanation:

Answer:

Body composition is the percentage of a body's weight

Explanation:

Body composition is the body's amount of fat relative to fat-free mass. Individuals with optimal body composition are typically healthier, move more easily and efficiently, and generally feel better.

Where θ 1 is the angle of the first line, and θ 2 is the angle of the second line.

Angle is the measure of a turn or displacement between two intersecting lines. Angles are typically measured in degrees, with 360 degrees in a full circle. acute angles are smaller than 90 degrees, while obtuse angles are larger than 90 degrees. Straight angles are exactly 180 degrees, while reflex angles are greater than 180 degrees.

The equation for the diffraction grating for the sodium is:
nλ = d sinθ
Where n is the order of the spectrum, λ is the wavelength of the light, d is the distance of the spectrum, and θ is the angle of the light.
For the first order, the initial angular position is:
nλ = d sinθ
θ = sin-1 (λ/d)
For the first order, the final angular position is:
nλ = d sinθ
θ = sin-1 (λ/d)
The angular separation of the two closely spaced yellow lines of sodium is:
Δθ = θ 1 - θ 2
Where θ 1 is the angle of the first line, and θ 2 is the angle of the second line.

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s=vt

s=6m/s×600s

s=3600m

Label the rows as the electron energy levels:

The rows of the periodic table are also known as periods. There are seven periods, and each period corresponds to a particular energy level. You can label them from 1 to 7, starting from the top row.

Label the number of valence electrons in Columns 1, 2, and 13-18:

Columns 1 and 2 are the s-block elements, and they have 1 and 2 valence electrons, respectively. Columns 13-18 are the p-block elements, and they have 3 to 8 valence electrons, respectively. You can label the number of valence electrons in each column.

Label the metals, semi-metals, and non-metals using different colors:

Metals are on the left side of the periodic table, semi-metals are in the middle, and non-metals are on the right side. You can use different colors to label them without obscuring any of the information about different elements.

Label the ion charges for elements in the first 3 rows:

Elements in the first 3 rows of the periodic table have predictable ion charges. The alkali metals (Group 1) have a charge of +1, the alkaline earth metals (Group 2) have a charge of +2, and the elements in Group 13 have a charge of +3. For Groups 15, 16, and 17, the charges are -3, -2, and -1, respectively. The noble gases (Group 18) are unreactive and do not form ions. You can write these charges for each element in their respective positions.

Label the trends for atomic size, ionization energy, and electron affinity:

Atomic size generally decreases from left to right across a period and increases from top to bottom within a group. Ionization energy generally increases from left to right across a period and increases from bottom to top within a group. Electron affinity generally increases from left to right across a period and becomes less negative from top to bottom within a group. You can label these trends on your periodic table as well.

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Light photons always travel at a constant speed (the speed of light) regardless of their energy, while the velocity of electrons is not constant and can vary with their energy.

Light photons and energetic electrons do not have constant velocities independent of energy. Light photons, which are particles of electromagnetic radiation, travel at a constant speed in a vacuum, which is approximately 299,792 kilometers per second (or about 186,282 miles per second) in a vacuum, denoted as the speed of light (c). This speed is a fundamental constant of nature and remains constant regardless of the energy of the photons. In other words, all photons, regardless of their energy, travel at the same speed in a vacuum.

On the other hand, energetic electrons do not have a constant velocity independent of their energy. According to classical physics, the velocity of an electron can vary depending on its energy. In classical mechanics, the kinetic energy of an object is related to its velocity. However, in the microscopic world of quantum mechanics, the behavior of particles such as electrons is described differently.

In quantum mechanics, the concept of particle velocity becomes less straightforward. Instead of velocity, quantum particles are described by wavefunctions, which represent the probability distribution of finding the particle at a certain location. The wavefunction of an electron evolves over time according to the Schrödinger equation, and it does not directly correspond to a well-defined classical velocity.

However, in certain situations, such as in electron beams or particle accelerators, electrons can be accelerated to high energies. In these cases, the energy of the electrons is related to their speed, but it is not a constant relationship. As the energy of the electrons increases, their speed can also increase, but it is not independent of their energy.

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Answer:

Because it is made by two different unit force (F) and displacement(s)

The  answer is that the statement is true only if the two forces are acting in the same direction. If the two forces are acting in opposite directions, then they cannot be combined into a single resultant force.

When two forces act on a body in the same direction, they can be combined into a single resultant force by simply adding their magnitudes. This is because the direction of the resultant force will be the same as the direction of the two forces.

However, when two forces act on a body in opposite directions, they cannot be simply added together. Instead, they will cancel each other out and create a net force of zero. In this case, the two forces cannot be combined into a single resultant force.

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A suitable viscometer for measuring the viscosity of Polyvinylpyrrolidone (PVP) solutions is a rotational viscometer, also known as a Brookfield viscometer.

The type of viscometer that is commonly used to measure the viscosity of PVP (polyvinylpyrrolidone) is a rotational viscometer. This instrument measures the resistance of a fluid to flow as it is subjected to a rotating spindle or bob. The viscosity of PVP can be determined by analyzing the torque and rotational speed of the spindle, which allows for precise measurements of the fluid's resistance to deformation.

Other types of viscometers, such as capillary viscometers and falling ball viscometers, may also be used to measure the viscosity of PVP, but rotational viscometers are typically preferred due to their accuracy and ease of use.
This type of viscometer is widely used for non-Newtonian fluids like PVP solutions, as it provides accurate and reliable measurements of viscosity at various shear rates.

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A suitable viscometer for measuring the viscosity of Polyvinylpyrrolidone (PVP) solutions is a rotational viscometer, also known as a Brookfield viscometer.

The type of viscometer that is commonly used to measure the viscosity of PVP (polyvinylpyrrolidone) is a rotational viscometer. This instrument measures the resistance of a fluid to flow as it is subjected to a rotating spindle or bob. The viscosity of PVP can be determined by analyzing the torque and rotational speed of the spindle, which allows for precise measurements of the fluid's resistance to deformation.

Other types of viscometers, such as capillary viscometers and falling ball viscometers, may also be used to measure the viscosity of PVP, but rotational viscometers are typically preferred due to their accuracy and ease of use.
This type of viscometer is widely used for non-Newtonian fluids like PVP solutions, as it provides accurate and reliable measurements of viscosity at various shear rates.

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Answer:

One example of conformity in my school is the wide obsession of designer clothes. Because famous people wear them kids think its cool and follow their actions.

Explanation:

C. Paramedic for a fire department

A Paramedic for a fire department is the type of employee would most likely spend the majority of work time in a vehicle. Hence, option C is correct.

putting out fires in their vicinity. preserving property and life in the event of localized flames. saving and safeguarding individuals in the event of a car accident, as well as in the event of other catastrophes.

An institution that offers services for fire prevention and suppression is known as a fire department or fire brigade. It is also sometimes referred to as a fire authority, fire district, fire and rescue, or fire service.

The name used in contemporary legislation and by government agencies for this is a fire and rescue service.

Thus, option C is correct.

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Answer:

The coefficient  of kinetic friction is 0.51.

Explanation:

Given that,

Applied force, F = 75 N

Mass of a box, m = 15 kg

The acceleration of the box is 3 m/s²

We need to find the coefficient  of kinetic friction. It is given by the formula as follows :

\(F=\mu_k F_N\)

Where,

\(F_N=mg\), is the normal force

\(\mu_k=\dfrac{F}{mg}\\\\\mu_k=\dfrac{75}{15\times 9.8}\\\\\mu_k=0.51\)

So, the coefficient  of kinetic friction is 0.51.

Answer:

It reveals that light is a wave

Explanation:

Diffraction is the property of a wave in which there is a bending of the wave about the corners of an obstacle or aperture into the geometrical shadow of the obstacle or aperture.

This simply implies that a wave bends or spreads out when it passes through openings. Since the light diffracts through small slits and diffraction has been shown to occur in water waves and sound waves, this property of diffraction can only be characteristic of a wave and thus, this evidence reveals that light is a wave.

Answer:

It shows that light can travel in different wavelengths.

Explanation:

Light is similar to a wave in the way that it travels in a straight line, but when it is passing through the slits, it diffracts due to this difference. Therefore, light refracts in the same way as a wave would, and it is a mode of transferring energy. The light travels in a way similar to a wave

Based on the terms provided, the phenomenon NOT commonly associated with the star formation process is: C. Intense ultraviolet radiation coming from a protostar.

During star formation, we usually observe powerful jets (A), spinning disks of material around protostars (B), and strong winds of particles blowing out into space (D). Intense ultraviolet radiation is typically associated with more evolved stars, not protostars.

A protostar is a dense, cool cloud of gas and dust that is the precursor to a star. The protostar is formed from the collapse of a molecular cloud, which is a region of interstellar gas and dust that is dense enough to begin the process of star formation.

As the molecular cloud collapses under the force of its own gravity, it becomes denser and hotter, eventually reaching a temperature and density where nuclear fusion can occur. At this point, the protostar becomes a true star and begins to emit light and heat.

The formation of a protostar is a complex process that can take millions of years, and involves a variety of physical processes such as rotation, magnetic fields, and turbulence. These factors can influence the shape and structure of the protostar, and may also play a role in the formation of planets and other objects in the surrounding protoplanetary disk.

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The wavelength of the photon emitted when a hydrogen atom undergoes a transition from the n=5 to n=3 state is `3.55 × 10⁻⁷ m` or `355 nm.`.

The wavelength of a photon emitted when a hydrogen atom undergoes a transition from the n=5 to n=3 state can be calculated using the Rydberg formula.

Rydberg formula is given by; `1/λ=R∞[1/n₁²-1/n₂²]` where λ is the wavelength of the photon, R∞ is the Rydberg constant, and n₁ and n₂ are the initial and final energy levels of the hydrogen atom, respectively.

Substitute the values given;n₁=5, n₂=3, and R∞= 1.097 × 10⁷ m⁻¹, we have;`1/λ=(1.097 × 10⁷ m⁻¹)[1/5²-1/3²]`

Simplify the equation by computing the denominators as follows; `1/λ= (1.097 × 10⁷ m⁻¹)[1/25-1/9]`

Then, subtract the fractions by finding the least common multiple, which is 225.`1/λ= (1.097 × 10⁷ m⁻¹)[9/225-25/225]``1/λ= (1.097 × 10⁷ m⁻¹)[-16/225]`

Multiplying both sides by λ, we get;`λ= [-225/16(1.097 × 10⁷ m⁻¹)]``λ= 3.55 × 10⁻⁷ m or 355 nm`

Therefore, the wavelength of the photon emitted when a hydrogen atom undergoes a transition from the n=5 to n=3 state is `3.55 × 10⁻⁷ m` or `355 nm.`.

Hence, option (a) is correct.

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Answer:

0.72 atm

Explanation:

Given that the atmospheric pressure on a mountain is 550 mmHg.

Where 1 atm is equal to 760 mmHg.

To Convert millimetre mercury (mmHg) into atmospheric pressure units (atm) , divide the magnitude of pressure by 760. That is,

Pressure = 550/760

Pressure = 0.724 atm

Therefore, pressure in atm is 0.72 atm in two significant figures

weather is short term while climate is over long periods of time.

for example during the winter it is cold which is the climate, but on some days it is warm which is the weather

Answer:

Last option

Explanation:

Answer:

Explanation:

In an RC circuit (a circuit consisting of a resistor and a capacitor), the time constant (τ) is the amount of time it takes for the voltage across the capacitor to reach approximately 63.2% of its final value, after a change in voltage is applied to the circuit.

It is calculated as the product of the resistance (R) and the capacitance (C) in the circuit

(τ = RC).

This time constant is also used to determine the rate at which the capacitor charges or discharges in the circuit

The amount of time needed to charged a capacitor beyond 63.2 percent of its maximum voltage is known also as resistive-capacitive (RC) time constant.

A capacitor is a storage of electricity device made up of two components that are isolated from one another and placed near to one another. A straightforward illustration of one such storage media is a complementary capacitor. Both alternating-current and direct-current systems use capacitors.

The initial surge of voltage your air conditioner's components require to function properly is provided by an AC capacitor. It stores electrical and feeds it to ones system's rotors in jolts that are strong enough to start the cooling cycle in your system.

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Estimating the number of apples that is the energy equivalent of 1 gallon of gasoline is difficult, as the energy content of both substances is different. However, we can calculate the energy content of one gallon of gasoline and compare it to the energy content of one apple. So, approximately 1,045,454 medium-sized apples will be the energy equivalent of one gallon of gasoline.

Explanation:

What is the energy content of 1 gallon of gasoline?

The energy content of gasoline is measured in British Thermal Units (BTUs). According to the US Energy Information Administration, one gallon of gasoline contains approximately 115,000 BTUs.Therefore, to calculate the number of apples that are the energy equivalent of one gallon of gasoline, we need to determine the energy content of one apple.

Calculating the energy content of apples:

The energy content of an apple varies depending on its size and type, but on average, one medium-sized apple contains about 95 calories or 0.00011 BTUs.To calculate how many apples are equivalent to one gallon of gasoline, divide the BTU content of gasoline by the BTU content of one apple:115,000 BTUs ÷ 0.00011 BTUs/apple ≈ 1,045,454 applesTherefore, approximately 1,045,454 medium-sized apples are the energy equivalent of one gallon of gasoline.

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The horizontal distance traveled by the football is determined as 25.33 m.

The horizontal distance traveled by the football is calculated as follows;

X = u²sin(2θ)/g

where;

X = (18² x sin(2 x 65))/9.8

X = 25.33 m

Thus, the horizontal distance traveled by the football is determined as 25.33 m.

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Answer:

Dry lubricants or solid lubricants are materials that, despite being in the solid phase, are able to reduce friction between two surfaces sliding against each other without the need for a liquid oil medium.

Explanation:

Answer:

Your answer is graphite :) Have a nice day

Explanation:

Answer:

What do you need help with?

Follow my lead or ur answer is very wrong

Current Job Market, Variable Ratio Schedule, Type A subjects recover to baselines rates much slower than Type B subjects., Specific challenging activities and commitment to goals,True

1) Current Job Market

Numerous studies have demonstrated a favourable correlation between organisational dedication and an employee's age, tenure, and educational attainment.

2) Variable Ratio Schedule

A reinforcement that strengthens behaviour after an erratic number of responses is known as a variable-ratio schedule.

3). Individuals with Type A personality commonly exhibit traits such as competitiveness and assertiveness, high levels of aggression and impatience, always associate themselves with winning than losing (i.e. achievement-oriented), and functioning at a quick pace. Most of them are highly dedicated to work and therefore force themselves into things that may not necessarily be interesting for them.

In the computer game experiment, Type A subjects are likely to show significantly higher stress response rates but beat the game more often than Type B subjects. Although both type A and B subjects are exposed to the same stress levels, Type A subjects experience more physiological stress and are likely to function better at those stress levels. Moreover, Type A subjects recover to baselines rates much slower than Type B subjects.  

4) Specific challenging activities and commitment to goals

According to Locke's theory of goal setting, situations that are challenging and conscious objectives drive human behaviour.

5) True

According to numerous research done to ascertain the connection between age and absenteeism.

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The normal stress on an inclined plane at 25 degrees can be calculated using σ = F / A * cos²θ, while the maximum normal stress is σ_max = F / A_max.

a. To calculate the normal stress developed on an inclined plane, we use the formula: σ = F / A * cos²θ. Given that the diameter of the rod is 12 inches, the radius (r) is half of the diameter, which is 6 inches or 0.5 feet. The cross-sectional area of the rod (A) can be calculated using the formula for the area of a circle: A = π * r². Substituting the values, we get A = π * (0.5)^2 = π * 0.25 = 0.7854 square feet.

Now, we can calculate the normal stress using the given axial tensile load (F) of 60 kips and the angle (θ) of 25 degrees. Since the load is given in kips (1 kip = 1000 pounds), we convert it to pounds by multiplying by 1000: F = 60 * 1000 = 60000 pounds.

Using the formula σ = F / A * cos²θ, we substitute the values and calculate the normal stress:

σ = 60000 / 0.7854 * cos²25 ≈ 95317.91 psi (pounds per square inch).

b. The maximum normal stress in the rod occurs when the inclined plane is aligned with the maximum cross-sectional area. In this case, the maximum cross-sectional area (A_max) is the same as the cross-sectional area of a circle, which is π * r². Substituting the radius value, we get A_max = π * (0.5)^2 = π * 0.25 = 0.7854 square feet.

To calculate the maximum normal stress (σ_max), we use the formula σ_max = F / A_max. Substituting the given axial tensile load (F) of 60 kips and the maximum cross-sectional area (A_max), we calculate the maximum normal stress:

σ_max = 60000 / 0.7854 ≈ 76448.44 psi (pounds per square inch).

Therefore, the normal stress developed on an inclined plane at an angle of 25 degrees with the cross section of the rod is approximately 95317.91 psi, and the maximum normal stress developed in the rod is approximately 76448.44 psi.

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The magnitude and direction (inward or outward) of the net flux through the cell boundary is - 0.887 wb.m².

Flux describes any effect that appears to pass or travel through a surface or substance.

The magnitude and direction (inward or outward) of the net flux through the cell boundary is calculated as follows;

Ф = Q/ε

where;

Φ = (-7.85 x 10⁻¹²)/(8.85 x 10⁻¹²)

Φ = - 0.887 wb.m²

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A substance that prevents free flow of electrical current is known as an electrical insulator. The electrons in the insulator's atoms are securely bonded and immobile.

Protons are in overabundance on an aluminium plate that is positively charged. A positively charged aluminium plate has a deficiency of electrons when viewed from the perspective of electrons. We might characterise each extra proton as being somewhat dissatisfied in terms of people.

The other plate develops an imposed positive charge as a result of the electron's electric field, which pulls on the electrons that are in that plate and repels other electrons.

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The addition of vectors allows to find the vector that the equilibrium is

                F = (40.02 i ^ - 49.95 j ^) N

Parameters given

To find

The force is a vector magnitude so the sum of the force must be done using the methods to add vectors.

One of the easiest methods to perform the addition of vectors is the analytical method where each vector is decomposed in a Cartesian system and the components added using algebraic summation and then the resulting vector is constructed.

We decompose the vector

                 cos θ = \(\frac{A_x}{A}\)Ax / A

                 sin θ = \(\frac{A_y}{A}\)

                 Aₓ = A cos θ

                 \(A_y\)= A sin θ

                 Aₓ = 64 cos 128.7

                 \(A_y\) = 64 sin 128.7

                 Aₓ = -40.02 N

                 \(A_y\) = 49.95 N

To find the vector that allows equilibrium, we work each axis independently

X axis

                 Aₓ + Fₓ = 0

                 Fₓ = - Aₓ

                 Fₓ = 40.02 N

Y axis

                  \(A_y + F_y =0 \\F_y = - A_y\\F_y = - 49.95 N\)

We can write the resulting vector in two ways

1) F = (40.02 i ^ - 49.95 j ^) N

2) in the form of module and angle

Let's find the module with the Pythagoras' Theorem

              F =\(\sqrt{F_x} ^2 + F_y^2)\\F = \sqrt{40.02^2 + 49.95^2 }\)  

              F = 64 N

Angles

              tan θ = \(\frac{F_y}{F_x}\)

              θ = tan⁻¹  \(\frac{F_y}{F_x}\)

              θ = tan⁻¹ \(\frac{-49.95}{40.02}\)

              θ = -51.3º

This angle is measured clockwise from the positive side of the x-axis

In conclusion using the sum of vectors we can find the vector that allows the equilibrium is

                F = (40.02 i^  - 49.95 j^ ) N

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