reflecting telescopes are preferred over refracting telescopes because:

(i) The hydraulic gradient is 0.45.

(ii) The flow rate is approximately 0.00000167 cubic meters per second.

(iii) The hydraulic conductivity is approximately 0.000037 meters per second.

(i) Hydraulic gradient:

The hydraulic gradient (i) can be calculated by dividing the head difference (h) by the distance (L) between the manometer tappings:

i = h / L

Given:

Head difference (h) = 45 mm

Distance between manometer tappings (L) = 100 mm

Converting the units to meters:

h = 45 mm / 1000 = 0.045 m

L = 100 mm / 1000 = 0.1 m

Substituting the values into the formula:

i = 0.045 m / 0.1 m = 0.45

(ii) Flow rate:

The flow rate (Q) can be calculated using the equation:

Q = (V / t) / A

Where V is the quantity of water collected, t is the duration of the test, and A is the cross-sectional area of the test sample.

Given:

Quantity of water collected (V) = 500 ml = 0.5 L

Duration of test (t) = 300 seconds

Diameter of test sample (d) = 100 mm

Converting the units to meters:

V = 0.5 L = 0.5 / 1000 = 0.0005 m³

t = 300 seconds

d = 100 mm / 1000 = 0.1 m

Calculating the cross-sectional area (A) using the formula for the area of a circle:

A = π * (d/2)^2

Substituting the values:

A = π * (0.1/2)^2 = π * 0.005^2 = 0.00007854 m²

Substituting the values into the formula for flow rate:

Q = (0.0005 m³ / 300 s) / 0.00007854 m²

Calculating the flow rate:

Q = 0.00000167 m³/s

(iii) Hydraulic conductivity:

The hydraulic conductivity (K) can be calculated using Darcy's Law:

K = Q / (A * i)

Given the values we calculated:

Q = 0.00000167 m³/s

A = 0.00007854 m²

i = 0.45

Substituting the values into the formula:

K = 0.00000167 m³/s / (0.00007854 m² * 0.45)

Calculating the hydraulic conductivity:

K ≈ 0.000037 m/s

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Answer:

8

Explanation:

thc jhjhhdb hhvb. ggjv. j h. vhvhhhdh.

Answer:

Electric force is a phenomenon which is experienced by a point charge due to its presence in an electric field. Electric force fields indicate the strength of the electric force that will be experienced, and also the direction of the force. The strength is shown by the closeness of the electric field lines and the direction is shown by the direction of the lines. Therefore, force fields are necessary in describing electric force.

Explanation:

Electric force is a phenomenon which is experienced by a point charge due to its presence in an electric field. Electric force fields indicate the strength of the electric force that will be experienced, and also the direction of the force. The strength is shown by the closeness of the electric field lines and the direction is shown by the direction of the lines. Therefore, force fields are necessary in describing electric force.

Answer:

The thermal energy gained by the water during the entire process is 90,372 J

Explanation:

Given;

mass of the ice cube, m = 30 g

latent heat of fusion of ice, L = 334 J/g

specific heat capacity of water, C = 4.184 J/g⁰C

latent heat of vaporization of water, h = 2260 J/g

The thermal energy gained by the water during the entire process is calculated as;

\(Q_t = Q_{fusion-ice} \ + \ Q_{boil-water} \ + \ Q_{steam-vapor}\)

The heat of fusion of the ice at 0⁰C is calculated as;

\(Q_{fusion} = mL = 30\ g \times 334 J/g = 10020 \ J\)

The heat of capacity of the water from  0⁰C to 100 ⁰C

\(Q_{boil-water} = mc\Delta \theta = mc(100-0) = 30\ g \times 4.184\ J/g^0C \times 100\ ^0C = 12,552 \ J\)

The heat of vaporization of the steam at 100⁰C is calculated as;

\(Q_{steam} = mh= 30 g \times 2260 \ J/g= 67,800 \ J\)

The thermal energy gained by the water during the entire procees;

Qt = 10,020 J  +  12,552 J   +  67,800 J

     = 90,372 J

Therefore, the thermal energy gained by the water during the entire process is 90,372 J

Mass of each body (m) = 8000 kg

Position of first body (x1) = -150 cm = -1.5 m

Position of second body (x2) = 370 cm = 3.7 m

Gravitational constant (G) = 6.67 × 10−11 N·\(m^2/kg^2\).

The magnitude of the net gravitational force (Fgrav) on the mass at the origin due to the other two masses is;We know that force of attraction between two masses (F) is given by;

F = G (m1 m2) / r²

where,G is the gravitational constant,

m1 and m2 are masses of the two objects,

r is the distance between the centers of the masses.

Now,

consider mass at the origin:It is attracted towards mass at -150 cm with a force (F1) given by;

F1 = G m m / r²

where,m is the mass of each object,

r is the distance between the objects.

Therefore,

F1 = (6.67 × 10−11) (8000) (8000) / (1.5)²

F1 = 2.64 × \(10^{-5}\) N

Next, mass at the origin is attracted towards mass at 370 cm with a force (F2) given by;

F2 = G m m / r²

where,

m is the mass of each object,r is the distance between the objects.

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Life tables summarize the probabilities of survival and mortality for individuals of different age groups within a population.

By studying the life history of endangered species, ecologists can identify critical life stages and factors influencing population declinesLife Tables show how long different age groups are likely to live, and how many people survive at each age.

By examining life tables, ecologists can:

Survivorship curves show how many individuals in a population survive over a period of time.

Ecologists who study animals that are in danger of becoming extinct, like red pandas, use life tables and survivorship curves to learn many things.

Life tables assist us in comprehending the variations in the size of a population, death rates that correspond to specific age groups, and the complete biography of a species.

Survivorship curves visually illustrate the proportion of individuals who survive at each age throughout their lives. They provide a depiction of the typical mortality trends present in a group of individuals and aid in recognizing unique approaches to survival.

Survivorship curves show how many individuals in a population survive over a period of time. They make a graph that shows how many people are still alive at each age. Survivorship curves show how many animals or people will survive or die in a population over time.

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Answer: the velocity is -2

Explanation: good luck don't think its wrong everyone calls me the human calculator

The velocity of the first car after the collision is approximately 11.84 m/s.

To determine the velocity of the first car after the collision, we can apply the principle of conservation of momentum. According to this principle, the total momentum before the collision is equal to the total momentum after the collision.

The momentum of an object is calculated as the product of its mass and velocity. Let's denote the velocity of the first car after the collision as v1.

Before the collision:

Momentum of the first car = mass of the first car * velocity of the first car

Momentum of the second car = mass of the second car * velocity of the second car

After the collision:

Total momentum = (mass of the first car + mass of the second car) * velocity of the first car (since they move together after collision)

Using the conservation of momentum, we can set up the equation:

(mass of the first car * velocity of the first car before) + (mass of the second car * velocity of the second car before) = (mass of the first car + mass of the second car) * velocity of the first car after

Substituting the given values:

(487 kg * 19.5 m/s) + (636 kg * 9.0 m/s) = (487 kg + 636 kg) * v1

Solving for v1:

(487 kg * 19.5 m/s) + (636 kg * 9.0 m/s) = (487 kg + 636 kg) * v1

v1 ≈ 11.84 m/s

Therefore, the velocity of the first car after the collision is approximately 11.84 m/s.

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If the rate of pulling the wagon is increased, then the distance will be shortened as the force will be too great for the coefficient of friction to handle.

Distance is the measure of how far apart two objects are or how long it would take to travel between them. It is typically measured in terms of length, such as kilometers, meters, miles, feet, yards, or other units of length. Though it can also be measured in terms of time, such as hours, minutes, or seconds. Distance can be calculated using a variety of methods, such as using a ruler, using a map, or using a GPS device. Distance can be used to describe both physical and abstract concepts, such as the distance between two people or the distance between two ideas.

The distance that a wagon can be pulled when its handle is pulled at a 30 degree angle depends on a variety of factors, such as the friction between the wagon and the surface it is being pulled on, the weight of the wagon and the force being applied to the handle. Generally speaking, a heavier wagon will require more force to move it the same distance as a lighter wagon when pulled at the same angle.

In order to determine the distance that a wagon can be pulled at a 30 degree angle, it is necessary to calculate the force being applied to the handle and the coefficient of friction between the wagon and the surface. Once these two values are known, it is possible to calculate the maximum distance that can be traveled by applying the equation distance = force * coefficient of friction * cosine (30 degrees).

It is important to note that the distance will only be the maximum distance that can be traveled if the wagon is being pulled at a constant rate. If the rate of pulling the wagon is increased, then the distance will be shortened as the force will be too great for the coefficient of friction to handle.

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The resulting changes will be:

1. Pressure head: 88 ft (or 26.82 m)

2. Effective stress: No change, assuming no other factors affect it

3. Fluid pressure: No change

4. Total stress: Decreased by the same amount as the effective stress

To calculate the effective stress in the aquifer, we need to subtract the fluid pressure from the total stress.

Given:

Pressure head in the aquifer = 100 ft (or 30.48 m)

The pressure head in the aquifer is directly proportional to the fluid pressure, which can be calculated using the formula:

Fluid pressure (P) = ρ * g * h

Where:

ρ = density of the fluid (water) = approximately 1000 kg/m³

g = acceleration due to gravity = 9.8 m/s²

h = pressure head

Fluid pressure = 1000 kg/m³ * 9.8 m/s² * 30.48 m ≈ 298,440 N/m² (or Pa)

The total stress in the aquifer is the sum of the fluid pressure and the effective stress. Therefore, the effective stress can be calculated by subtracting the fluid pressure from the total stress.

Now, let's consider the changes in the hydraulic head due to pumping:

Change in hydraulic head = -12 ft (or -3.66 m)

The resulting changes in each parameter will be as follows:

1. Pressure head:

The pressure head will be reduced by 12 ft, so the new pressure head will be 100 ft - 12 ft = 88 ft (or 26.82 m).

2. Fluid pressure:

The fluid pressure does not change, as it depends on the density of the fluid and the acceleration due to gravity, which remain constant.

3. Effective stress:

The effective stress can be calculated as the total stress minus the fluid pressure. Since the fluid pressure remains constant, the effective stress will also remain constant unless there are other factors affecting it.

4. Total stress:

The total stress is the sum of the fluid pressure and the effective stress. As mentioned earlier, the fluid pressure remains constant, so the total stress will decrease by the same amount as the effective stress, assuming no other factors affect the total stress.

Therefore, the resulting changes will be:

1. Pressure head: 88 ft (or 26.82 m)

2. Effective stress: No change, assuming no other factors affect it

3. Fluid pressure: No change

4. Total stress: Decreased by the same amount as the effective stress

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Change in angular velocity is always created when a net torque is applied to a rigid body. Thus, option I. is the correct answer.

I. Change in angular velocity: When a net torque is applied to a rigid body, it changes the body's angular velocity. The magnitude and direction of the angular velocity depend on the net torque and the moment of inertia of the body. Thus, Option I is the correct option.

II. Rotational equilibrium:  Rotational equilibrium can be defined as the condition where the net torque acting on a body is zero, resulting in a constant angular velocity. However, applying a net torque will generally lead to a change in the angular velocity, which will result in a rotational acceleration rather than rotational equilibrium. Therefore, this option is not always created when a net torque is applied to a rigid body.

III. Constant angular velocity:  A net torque can change the body's angular velocity, which will result in either an increase or a decrease in the angular velocity. Therefore, this option is not always created when a net torque is applied to a rigid body.

IV. Constant angular momentum:  When a net torque is applied to a rigid body, the angular momentum of the body is not necessarily constant. Angular momentum is conserved in the absence of any external torques acting on the body. However, the angular momentum can change when a net torque is present. Therefore, this option is incorrect.

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The heat transfer rate by convection is given by the following equation: qcon v = h × A × (Tb - Ta)The heat transfer rate by radiation is given by the following equation: qra d = σ × A × [(Tb + 273)4 - (Ts + 273)4] × εEquating the above equations, we get,

The steady convective heat flux from the base plate to air is given by the following equation: qcon v = h × A × (Tb - T where, qcon v = steady convective heat flux from the base plate to air h = convective heat transfer coefficient A = area of the base plate.

Tb = temperature of the base plate Ta = temperature of the air. The heat transfer rate by convection is given by the following equation: qcon v = h × A × (Tb - T Use the definition of net radiative heat transfer and heat transfer rate equation for thermal radiation together with emissivity of steel ca0.5 to calculate the steady radiative heat flux from the base plate to the surrounding.

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Answer:

The main cause Is that more light energy from the sun is transfered to the ground of Eastbrook and the energy then move to the air that is above Eastbrook.

Explanation:

Different in air Temperature is caused by combination of water, air and land working hand in hand. The water, air and land cause heating and cooling of different areas at different rates. Also there are differences in temperature in different places base on seasons or time of the year. As you move higher in a place or a mountainous area tend to have high temperature than the ocean.

Answer:

What I think that Jose's grandmother meant by saying that the bread was too dense is that she thinks the bread is too heavy or it can even mean to be too compacted in substance. The matter in the bread are close together and not spread out like in the air, when the matter in the air starts to come closer together it starts to make fog, because it is becoming more dense. Some more things that are heavy or dense are things like a big stereo speaker, an anvil, or even a big piece of wood used to build.

Explanation:

Answer:

1) The velocity of the ball return to the thrower's hand is -15 meters per second.

2) The resulting velocity of the boat is \(\vec v_{B} = 6\,\hat{i}+18\,\hat{j}\,\left[\frac{m}{s} \right]\).

Explanation:

1) Let suppose that ball experiments a free fall, that is an uniform accelerated motion, in which effects from gravity and Earth's rotation can be neglected. The velocity of the ball is represented by the following equations of motion:

Position

\(v_{o}\cdot t -\frac{1}{2}\cdot g\cdot t^{2} = 0\)

\(t\cdot \left(v_{o}-\frac{1}{2}\cdot g\cdot t \right) = 0\) (1)

Velocity

\(v = v_{o}-g\cdot t\) (2)

Where:

\(t\) - Time, measured in seconds.

\(g\) - Gravitational acceleration, measured in meters per square second.

\(v_{o}\) - Initial velocity of the ball, measured in meters per second.

\(v\) - Final velocity of the ball, measured in meters per second.

From (1), we get the time when the ball returns to the thrower's hand:

\(v_{o}-\frac{1}{2}\cdot g\cdot t = 0\)

\(t = \frac{2\cdot v_{o}}{g}\)

And then we apply this result in (2):

\(v = v_{o}-g\cdot \left(\frac{2\cdot v_{o}}{g} \right)\)

\(v = -v_{o}\) (3)

Then, the velocity of the ball return to the thrower's hand is -15 meters per second.

2) The resulting velocity of the boat (\(\vec v_{B}\)) is represented by the vectorial sum of the velocity of the boat relative to the river (\(\vec v_{B/R}\)) and the velocity of the river (\(\vec v_{R}\)), both measured in meters per second, that is:

\(\vec v_{B} = \vec v_{R}+\vec {v}_{B/R}\) (4)

If we know that \(\vec v_{R} = 6\,\hat{i}\,\left[\frac{m}{s} \right]\) and \(\vec v_{B/R} = 18\,\hat{j}\,\left[\frac{m}{s} \right]\), then the resulting velocity of the boat is:

\(\vec v_{B} = 6\,\hat{i}+18\,\hat{j}\,\left[\frac{m}{s} \right]\)

The resulting velocity of the boat is \(\vec v_{B} = 6\,\hat{i}+18\,\hat{j}\,\left[\frac{m}{s} \right]\).

Answer:

The answer is electron, if that's what you mean.

Explanation:

An electron is a negative charged particle that is found in the middle of the atom.

Hopefully, this helps! :D

Ask your question below!

Answer:

The answer is electron bc its a negatively charged particle in an atom

Explanation:

I think it is third law.

Answer:

C) Third law

Explanation:

:)

Answer:0.098

Explanation:

The bodies of Columbia found in Lake Nacogdoches and the Toledo Bend Reservoir.

All of the astronauts' remains were recovered in East Texas. “Every time remains were recovered, they would pause and everything and have a moment of silence,” said Orwig. Two decades later, pieces of the shuttle are still being found, a reminder of this tragic historical event that took place in the Texas sky.

The remains of all seven astronauts were recovered, despite the obstacles of terrain and the scope of the search. Searchers combed through pine forests, hundreds of thousands of acres of underbrush, and boggy areas. Parts of the shuttle were found in Lake Nacogdoches and the Toledo Bend Reservoir.

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The work done by the person to climb the stairs is approximately 1521.72 Joules.

To find the work done by a person while climbing stairs, we can use the equation:

Work = force * distance * cos(theta)

where force is the force applied by the person, distance is the vertical distance climbed, and theta is the angle between the force applied and the direction of motion.

In this case, the force applied by the person is equal to their weight, which can be calculated using the equation:

force = mass * acceleration due to gravity

\(force = 74.0 kg * 9.8 m/s^2\)

force = 725.2 N

The distance climbed is given as 2.10 meters.

The angle theta is 0 degrees since the force applied by the person is in the same direction as the motion.

Now we can calculate the work done:

Work = 725.2 N * 2.10 m * cos(0°)

Work = 725.2 N * 2.10 m * 1

Work = 1521.72 J

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Answer:

147N

Explanation:

pressure = 7pa

area= 21m

force=?

now,

p = f/a

7 = f/21

f = 21×7

therefore, f = 147N.

Answer:

B. people with OCD know their disorder is irrational

Explanation:

Got it right

Answer:

B

Explanation:

Edge2021

In materials such as metals the outer most electrons are loosely bound and therefore their movement is chaotic, this allows for the transportation of energy in form of electricity therefore, this materials are good conductors. The statement is true.

The force on charge q2 is approximately 179.751 N.

The force between two point charges can be found using Coulomb's law:
F = (k * q1 * q2) / r^2
Where F is the force between the charges, k is the Coulomb constant (8.98755 × 10^9 N·m^2/C^2), q1 and q2 are the magnitudes of the charges in Coulombs, and r is the distance between the charges in meters.
In this case, q1 = 2 µC and q2 = 10 µC. The distance between the charges is the distance between the origin and the point on the x-axis where q2 is located, which is 10 m.
So, we can calculate the force on q2 as follows:
F = (8.98755 × 10^9 N·m^2/C^2) * (2 µC) * (10 µC) / (10 m)^2
F = (8.98755 × 10^9 * 2 * 10) / 100
F = 1.79751 × 10^9 / 100
F = 1.79751 × 10^7 N
The force on charge q2, we can use Coulomb's Law. Coulomb's Law states that the force (F) between two point charges is directly proportional to the product of their charges (q1 and q2) and inversely proportional to the square of the distance (r) between them:
F = k * (q1 * q2) / r^2
In this case, q1 = 2 µC, q2 = 10 µC, r = 10 m, and the Coulomb constant (k) is 8.98755 × 10^9 N·m^2/C^2.
The charges to Coulombs: q1 = 2 × 10^-6 C and q2 = 10 × 10^-6 C.
F = (8.98755 × 10^9 N·m^2/C^2) * ((2 × 10^-6 C) * (10 × 10^-6 C)) / (10 m)^2
F = (8.98755 × 10^9 N·m^2/C^2) * (2 × 10^-5 C^2) / (100 m^2)
F = 179.751 N

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The first statement is true; if dim V = p and if S is a linearly dependent subset of V, then S contains more than p vectors.

The second statement is false; if S spans V and if T is a subset of V that contains more vectors than S, then T is linearlyly dependent.

Explanation:

If S is linearly dependent, then there is at least one vector in S that can be written as a linear combination of the remaining vectors. If this is the case, then this vector is redundant, and it can be removed from S. This means that we can repeat the process until we have removed all the redundant vectors from S.So, let us assume that S is a linearly dependent subset of V such that dim V = p, then we have the following:dim (span S) < dim Vp. So S contains more than p vectors.

The  second statement is false; if S spans V and if T is a subset of V that contains more vectors than S, then T is linearly dependent.

Explanation:Let us assume that S spans V and if T is a subset of V that contains more vectors than S, then T must have a vector not in S. We can add this vector to S to get a set that contains all the vectors in T. The resulting set is linearly dependent because it contains more vectors than S, which is known to span V.

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Answer: The mass would be 1000m3 and the volume would be 1000kg

Explanation:

Our atmosphere is transparent to solar radiation, but it traps the energy that causes the greenhouse effect because the solar energy absorbed by Earth is reradiated as longer-wavelength radiation.

The atmosphere is transparent to incoming solar radiation, which is mostly visible light and short-wavelength radiation. However, the Earth absorbs some of this solar radiation and heats up.

The Earth then radiates this heat energy back out to space as longer-wavelength radiation, mostly in the form of infrared radiation. The greenhouse gases in the atmosphere, such as carbon dioxide and water vapor, are able to absorb this longer-wavelength radiation and trap some of the heat energy in the atmosphere, causing the greenhouse effect.

Hence, this is why the atmosphere is transparent to solar radiation but traps the energy that causes the greenhouse effect.

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