the rate of diffusion across a thin membrane can be increased by . select all that apply. the rate of diffusion across a thin membrane can be increased by .select all that apply. increasing the concentration gradient increasing the diffusion coefficient decreasing the cross-section area of the membrane increasing the thickness of the membrane

Answer:

In terms of the light spectrum, blue is a primary color, which means that it is one of the base colors that exist in the universe and it cannot be created by combining different colors together. The primary pigment colors are cyan, magenta, and yellow. Cyan absorbs red, yellow absorbs blue, and magenta absorbs green.

Explanation:

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If the temperature of the gas is decreased then the pressure will also decrease.

The molecules of a gas receive more energy when heated, causing them to move more quickly. This results in increased pressure and more impacts on the container's walls. On the other hand, cooling the molecules will cause them to slow down and reduce pressure.

This is more explained by Gay Lussac's Law which states that the pressure of a given amount of gas held at constant volume is directly proportional to the Kelvin temperature.

                                      P1/T1 = P2/T2

Thus, with decrease in temperature the pressure will decrease as the move of molecules will be slow now.

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Answer:

D.

Driving and talking on any type of cell phone increases the chance of missing traffic signals.

Explanation:

correct on edge2021

Answer:

the answer is d thank me later

Explanation:

1. Resistance is the opposition offered in a path of flow of current by the atoms or molecules of the conductor.

Factors on which resistance of a conductor depends are:

2. Rheostat is used to change the resistance without changing the voltage source in an electric circuit.

3.

Given :

\(\dashrightarrow l = 50 m\)

\(\dashrightarrow A = 0.01 {mm}^{2} \)

\(\dashrightarrow A = 0.01 \times {10}^{ - 6} \: {m}^{2} \)

\(\dashrightarrow \rho = 5 \times {10}^{ - 8} \: \Omega \: m\)

We know that,

\( \dashrightarrow R = \rho \dfrac{l}{A}\)

\( \dashrightarrow R = 5 \times {10}^{ - 8} \bigg(\dfrac{50}{0.01 \times {10}^{ - 6} } \bigg)\)

\( \dashrightarrow { \pink{ \underline{ R = 250 \: \Omega }}}\)

The resistance of a conductor is the opposition to the flow of current and depends on the length and area of the material

Resistance is the opposition to the flow of current by the atoms or molecules of the conductor.

The factors on which resistance of a conductor depends are:

A Rheostat is the device used to change the resistance without changing the voltage source in an electric circuit.

The resistanceis given as:

Area = 0.01 square mm = 1.0 × 10^-8 square m

R = (50 × 5 ×10 ^-8 ohm m)/1.0 × 10^-8 square m

Resistance = 250 ohm

Therefore, resistance of a conductor is the opposition to the flow of current.

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Primary clarifiers removing biological nutrients is not true. Primary clarifiers

involves the use of processes such as sedimentation in order to remove

particles floating or other inorganic solids from the waste water.

Biological nutrients such as nitrogen and  phosphorus are found in waste

water and removal of these important nutrients for other uses is a part of

waste water management.

The secondary clarifiers are the ones responsible for the removal of

biological nutrients in the waste water through biofiltration etc.

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If car A is moving north, for example, the direction of its velocity is north. Hence, the direction of the velocity is North.

If the driver of car B looks out the window and sees car A, the velocity (magnitude and direction) of car A as observed by the driver of car B is:

Velocity (magnitude): The velocity of car A is the speed and direction at which it is moving. If the velocity of car A is V1, the magnitude of the velocity will be the speed of the car.

If the car is moving at 20 meters per second, for example, the magnitude of the velocity is 20 m/s. Hence, the magnitude of the velocity is 100.

Direction: When you calculate the velocity of a car, you need to include its direction. Since the driver of car B looks out the window and sees car A, the direction of the velocity of car A will be the direction it is heading in. If car A is moving north, for example, the direction of its velocity is north. Hence, the direction of the velocity is North.

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Answer:  10 minutes

Explanation:

30 gal / 2 min = 15 gal/min  (this is the fill-rate)

x = # minutes to fill a 150 gal pool at a rate of 15 ga/min

(15 gal/min)(x min) = 150 gal

x min = (150 gal) / (15 gal/min) = 10 min

a) The initial velocity (assumed horizontal) of the bullet can be calculated using the equation for kinetic friction:
μ = (kinetic friction) = (force of friction) / (normal force).
Since the normal force in this case is equal to the mass of the wooden block multiplied by the acceleration due to gravity (9.81 m/s2), we can write:
μ = Ff / (M*g) = 0.50
Ff = (M*g)*μ = (0.999 kg)(9.81 m/s2)(0.50) = 4.90 N
The equation for kinetic energy is Ek = 1/2mv2.
Substituting Ek = Ff * x (where x is the compression distance of the spring), we can write:
1/2mv2 = (4.90 N)(0.046 m)
Rearranging, we get:
v2 = (4.90 N)(0.046 m)/(1/2m) = (4.90 N)(0.046 m)/(0.0010 kg/2) = 94.00 m2/s2
Taking the square root of both sides gives the initial velocity of the bullet:
v = 9.70 m/s

b) The fraction of the bullet's initial kinetic energy that is dissipated in the collision can be found by comparing the initial and final kinetic energies.
The initial kinetic energy is equal to 1/2(0.0010 kg)(9.70 m/s)2 = 0.046 J.
The final kinetic energy is equal to 0, since the bullet comes to rest after the collision.
Therefore, the fraction of the bullet's initial kinetic energy that is dissipated in the collision is equal to (final energy)/(initial energy) = 0/0.046 = 0.

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The 100 Ω and 50 Ω have been joined in series and their combination is joined in parallel with 75 Ω, in the given picture. The circuit diagram shown below.

A circuit diagram uses electrical symbols to show the various components of an electrical circuit graphically or visually. There is a lot of resistance in the voltmeter.

For the design (circuit design), fabrication (like PCB layout), and maintenance of electrical and electronic equipment, circuit diagrams are utilized. When illustrating Boolean algebraic expressions, circuit diagrams are helpful in the field of computer science.

We may create parallel and series circuits, which are two different sorts of circuits. Wires connect the various parts of a circuit. If there are no branches, the circuit is in series. If there are branches, the circuit is parallel.

Consider the 100 Ω and 50 Ω have been joined in series and their combination is joined in parallel with 75 Ω.

The circuit diagram drawing is as follows:

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The complete question is as follows:

Draw a circuit diagram for the circuit of Figure P23.1.

After converting grams to kilograms (35.0 g = 0.035 kg) and performing the calculation, we find that the original speed of the bullet (V) is approximately 7.4086 m/s.

To determine the original speed of the bullet, we can use the principle of conservation of momentum. The momentum before the collision is equal to the momentum after the collision.

The momentum before the collision is given by the formula: momentum = mass × velocity.

Let's assume the original speed of the bullet is V.

Before the collision:

Momentum of the bullet = mass of the bullet × velocity of the bullet = (35.0 g) × V

Momentum of the lumber = mass of the lumber × velocity of the lumber = (4.6 kg) × 0 (since the lumber is stationary)

After the collision:

The combined mass of the bullet and lumber is (35.0 g + 4.6 kg) = 4.635 kg.

The velocity after the collision is 7.2 m/s.

Using the conservation of momentum equation:

Momentum before the collision = Momentum after the collision

(35.0 g) × V = (4.635 kg) × 7.2 m/s

Now we can solve for V:

V = ((4.635 kg) × 7.2 m/s) / (35.0 g)

After converting grams to kilograms (35.0 g = 0.035 kg) and performing the calculation, we find that the original speed of the bullet (V) is approximately 7.4086 m/s.

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Answer:

See below ~

Explanation:

The fact that water is attracted to itself, a property called cohesion, leads to another important property, the liquid form of water is more dense than the solid form. As water solidifies into ice, the molecules must move apart in order to fit in to a crystal lattice structure, causing water to expand as it freezes. Because of this, ice floats and water sinks, which keeps the oceans liquid and prevents them from freezing solid from the bottom up.

Answer:

Approximately \(7.2\; {\rm m\cdot s^{-1}}\) (rounded up), assuming that this circle is vertical and \(g = 9.81\; {\rm m\cdot s^{-2}}\).

Explanation:

Let \(v\) denote the tangential speed of the ball, and let \(r\) denote the radius of the circle. Since the ball is in a circular motion, the acceleration on this ball would be equal to the centripetal acceleration \(a = (v^{2} / r)\). The net force on this ball would be \(F_{\text{net}} = m\, a = (m\, v^{2} / r)\).

The net force on this ball is also the vector sum of the tension \(T\) in the rope and the weight of the ball \(m\, g\):

\(F_{\text{net}} = (\text{weight}) + T\).

\(T = F_{\text{net}} - (\text{weight})\).

Note that:

\(\| T \| = \|F_{\text{net}} - (\text{weight})\| \le \|F_{\text{net}} \| + \| (\text{weight})\|\).

In other words, the magnitude of tension \(T\) is at most equal to \(\|F_{\text{net}} \| + \| (\text{weight})\| = (m\, v^{2} / r) + (m\, g)\), which happens when weight and net force are in opposite directions.

When the speed of the ball is maximized, the magnitude of tension \(T\) would be at the largest possible value of \(130\; {\rm N}\). Rearrange the equation and solve for speed \(v\):

\(\displaystyle \frac{m\, v^{2}}{r} + m\, g = \|T\|\).

\(\begin{aligned}v^{2} = \frac{r}{m}\, (\|T \| - m\, g) = \frac{r\, \|T\|}{m} - r\, g\end{aligned}\).

\(\begin{aligned}v &= \sqrt{\frac{r\, \|T\|}{m} - r\, g} \\ &= \sqrt{\frac{(1.2)\, (130)}{2.5} - (1.2)\, (9.81)}\; {\rm m\cdot s^{-1}} \\ &\approx 7.2\; {\rm m\cdot s^{-1}}\end{aligned}\).

The mass of an object broken into parts can be determined by finding the mass of the parts, and then add those masses together.

To total mass of an object broken into parts can be determined by adding the mass of different parts together.

\(M_t = m_1 + m_2 +\ ---\)

where;

Thus, we can conclude that the mass of an object broken into parts can be determined by finding the mass of the parts, and then add those masses together.

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Answer:

people play basket ball on espn every year

Explanation:

i just need points

The force of a magentic field is given by the next formula

We have F force, I current, B magnetic field, L lenght and sin theta which represents the angle between them. This is important because this interactions depends on the direction.

Based on the information, the angle is 90 because is perpendicular, as it is mentioned on the text

The correct conductor ampacity for a 10-horsepower, 230-volt, single-phase motor is option c. 62.5 A.

The ampacity of a conductor is a measure of the maximum amount of electrical current that can flow through it safely. The ampacity required for a motor is based on the size of the motor and the voltage of the electrical system. There are standard methods for determining the minimum ampacity for a given motor and voltage, such as the National Electric Code (NEC) and the American National Standards Institute (ANSI). The NEC and ANSI both state that the minimum ampacity for a 10-horsepower, 230-volt, single-phase motor is 62.5 amperes. It's important to note that using a conductor with ampacity lower than the recommended one may cause the motor to overheat and fail, leading to damage or even fire hazard.

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Based on scientific data, the stone is accelerated at approximately 10 \(m/s^2\).

Given the following data:

Gravity can be defined as a force of attraction that controls the movement of the planets such as Earth around the Sun.

This ultimately implies that, gravity is a universal force of attraction that acts between all objects or matter that are having both mass and energy, and can occupy space.

Furthermore, the gravity near the Earth's surface generally makes it possible for all physical objects such as stones to possess weight and experience a free fall.

According to astronomical records, the acceleration due to gravity for an object experiencing a free fall near the Earth's surface is 9.8 \(m/s^2\).

In this scenario, the stone is accelerated at approximately 10 \(m/s^2\).

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The chi-square test assumes that the variables being analyzed are measured at a nominal or ordinal level of measurement.

In statistics, the level of measurement refers to the nature and properties of the data being collected. There are four levels of measurement: nominal, ordinal, interval, and ratio. Nominal and ordinal levels are considered categorical, while interval and ratio levels are considered numerical. The chi-square test is specifically designed for analyzing categorical data, where the observations can be classified into distinct categories or groups. It is used to determine whether there is a significant association or relationship between two categorical variables.

The test calculates the difference between the observed frequencies and the expected frequencies under the assumption of independence between the variables. It compares the observed and expected frequencies using a chi-square statistic and determines the p-value to assess the statistical significance of the association. Therefore, the chi-square test assumes that the variables being analyzed are measured at a nominal or ordinal level because it deals with categorical data and evaluates the relationship between different categories or groups.

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Answer:

The correct answer is - radiant.

Explanation:

Electromagnetic waves are the transverse waves that get energy as radiation from the source and transfer to an absorber so, the radiant energy is the energy of electromagnetic waves.

Electromagnetic waves are can travel in space unlike mechanical waves and are made up of photons, tiny packets of energy. Electromagnetic waves or spectra include radio waves, infrared, light, microwaves, UV, X-rays, and gamma rays.

Answer:

\(g=0.035\ m/s^2\)

Explanation:

Given that,

Mass of Earth, \(m=6\times 10^{24}\ kg\)

We need to find the gravitational acceleration of a satellite that is in orbit at a distance of \(10^8\ m\) from the center of the Earth.

Radius of earth is 6,371 km

The formula used to find the gravitational acceleration at a distance is given by :

\(g=\dfrac{Gm}{R^2}\)

R = r+d

\(g=\dfrac{6.67\times 10^{-11}\times 6\times 10^{24}}{(10^8+6371\times 10^3)^2}\\\\g=0.035\ m/s^2\)

So, the gravitational acceleration is \(0.035\ m/s^2\).

As the base elevation of a thundercloud gets lower and lower, the possibility of lightning strike increases. Thunderstorms form when warm, moist air rises and cools, forming clouds.

These clouds are known as cumulonimbus clouds, which are tall and have a flat base. The base of a cumulonimbus cloud can vary in height, depending on the temperature and moisture content of the air below it.

The lower the base of a thundercloud, the closer it is to the ground, and the more likely it is to produce lightning strikes. This is because lightning is an electrical discharge that occurs when there is a difference in charge between two objects, such as the cloud and the ground. When the base of a thundercloud is low, it means that the cloud is closer to the ground, which increases the likelihood of a charge difference between the cloud and the ground.

Furthermore, the lower base of a thundercloud can also mean that there is more moisture in the air below it, which can lead to more lightning strikes. This is because moisture in the air can help to conduct electricity, making it easier for lightning to travel from the cloud to the ground.

In conclusion, the lower the base elevation of a thundercloud, the greater the possibility of lightning strike due to the increased proximity to the ground and higher moisture content. It is important to stay indoors and avoid outdoor activities during thunderstorms to avoid the risk of being struck by lightning.

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The upward force exerted by the elevator floor on the passenger is 7.6 times mass of the passenger.

A force in physics is an effect that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Given in question elevator accelerates downwards with an acceleration of 1.2 m/s². There is acceleration due to gravity working downward which is 9.8 m/s².

So, net acceleration due to gravity is given as 9.8 - 1.2 = 7.6 m/s²

The upward force exerted by the elevator floor on the passenger is mass times acceleration, 7.6 times mass of passenger.

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Answer:

243J

Explanation:

K.E = 1/2 x 54 x 3^2

K.E = 1/2 x 54 x 9

K.E = 1/2 x 486

K.E = 486/2

K.E = 243J

The mass of the egg = 0.23 kg

The force, F = 16 N

The acceleration, a = 68.6 m/s²

The relationship between the force (F), acceleration (a), and mass (m) is:

F = ma

Substitute F = 16, a = 68.6, and solve for m

16 = 68.6m

m = 16/68.6

m = 0.23 kg

After three half-lives, 1/8 (or 0.125) of the parent isotope remains. Thus, 0.125 times the parent atoms. The daughter isotope would be equivalent to the remaining parent isotope, 0.125 times the original number of parent atoms.

After three half-lives, the parent isotope has exponentially decayed, forming the daughter isotope. Each half-life reduces the parent isotope by half and increases the daughter isotope. Three half-lives have passed, reducing the parent isotope to 1/8 of its initial level. The rock sample would have 1/8 of the parent isotope.

The daughter isotope would have accumulated during decay. After three half-lives, the daughter isotope would have reached 3/8 of the parent isotope as each half-life creates one-half of it. After three half-lives, the rock sample would have 1/8 of the parent isotope and 3/8 of the daughter.

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\( \huge \mathrm{ Answer࿐ }\)

The correct option is :

\(\hookrightarrow\) 62 cm in back of the mirror

_____________________________

Plane mirror always make a virtual and erect Image which is as far from the mirror as the object is !

_____________________________

\(\mathrm{ \#TeeNForeveR}\)

\(\\ \rm\Rrightarrow Work\:done=Force(Distance)\)

\(\\ \rm\Rrightarrow Work\:done=20(20)=400J\)

Option D

The change in the potential energy of the ball is equal to 0J. Therefore, option (A) is correct.

Work can be described as the energy used when a force is exerted to move an object through a specific displacement. The work done can be defined as it depends upon both the force on the object and the displacement by the object.

The displacement in a straight line in the direction of the applied force over a distance 'd'.

W= F × d

Where 'F' is the exerted force and 'd' is the displacement by the object.

The change in the potential energy or kinetic energy is equal to the work done.

The change in the potential energy  = mgh₂ - mgh₁

The ball roll over the surface, h₂ = h₁

Therefore, the change in the potential energy is equal to zero.

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To determine the maximum source voltage amplitude at the resonant frequency in the RLC series circuit, we need to calculate the impedance of the circuit at resonance and then use it to find the maximum voltage.

The impedance (Z) of an RLC series circuit is given by:

Z = √((R^2 + (ωL - 1/(ωC))^2))

Where ω is the angular frequency and is equal to 2πf, with f being the resonant frequency.

First, let's calculate the resonant frequency (f) using the given values of inductance (L) and capacitance (C):

f = 1 / (2π√(LC))

  = 1 / (2π√((0.190 × 10^(-3)) * (37.0 × 10^(-9))))

 ≈ 1.058 MHz

Next, calculate the angular frequency (ω):

ω = 2πf

  ≈ 2π * (1.058 × 10^6)

  ≈ 6.66 × 10^6 rad/s

Now, we can calculate the impedance at resonance:

Z = √((R^2 + (ωL - 1/(ωC))^2))

  = √((347^2 + ((6.66 × 10^6) * (0.190 × 10^(-3)) - 1/((6.66 × 10^6) * (37.0 × 10^(-9))))^2))

  ≈ 347 Ω

Since the impedance at resonance is equal to the resistance (Z = R), the maximum source voltage amplitude is equal to the maximum voltage across the capacitor. Therefore, the maximum source voltage amplitude is 7.00 × 10² V or 700 V.

The maximum source voltage amplitude in the RLC series circuit, operated at the resonant frequency, is 700 V. This is because the impedance at resonance is equal to the resistance, and the maximum voltage occurs across the capacitor. The resonant frequency is calculated using the given inductance and capacitance values. The impedance at resonance is determined by the resistance, inductance, and capacitance values of the circuit.

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