a car at the surface of earth is driving a horizontal circular track at a constant speed. the cars direction of travel is counterclockwise. when the car is passing the northernmost part of the circle, the cars acceleration must be

The answers are a) 10cm/hr; b) -40cm/hr. Height of soil column (H) = 40 cm, Cross-sectional area (A) = 100 cm², Water ponded on soil = 10 cm, Volume rate (Q) = 1000 cm³/hr, Downward direction = Steady-state

a) Steady-state flux through the soil is given by the Darcy's law. Darcy's law states that the volume flow rate per unit area is directly proportional to the hydraulic gradient. That is,

Q/A = - K dh/dl Where Q = Volume flow rate, A = Cross-sectional area, K = Hydraulic conductivity, dh/dl = Hydraulic gradient, dh/dl = Change in height/change in length, dh/dl = H/L = 10/40 = 0.25

Substituting the given values, Q/A = - K dh/dl⇒K = - Q/(A dh/dl)⇒K = - 1000 / (100 × 0.25)⇒K = - 4000/100 = - 40 cm/hr

Steady-state flux through the soil = Q/A⇒1000/100⇒10 cm/hr

b) Hydraulic conductivity of the soil can be determined using Darcy's law.

K = - Q/(A dh/dl)⇒K = - 1000/(100 × 0.25)⇒K = - 4000/100K = - 40 cm/hr

Therefore, hydraulic conductivity of the soil is -40 cm/hr.

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Answer:

2

Explanation:

I'm not sure but I think the answer is 2 because even the average of the 3 values is not quite close 28 Kg.

Answer: the water level would rise since the pebble displaces minimal water compared to the boat.

Explanation:..........

Answer:

When appliances are linked in parallel, there is no voltage division.

Explanation:

A battery is a device that consists of one or more electrochemical cells with external connections that is used to power electrical devices such as torches and mobile phones. People frequently mistake cell and battery for the same thing. Nonetheless, it is important to understand that a cell is a single device that converts chemical energy into electricity, while a battery is a collection of cells. The benefit of connecting an electrical gadget to a battery in parallel is

Answer:

See below

Explanation:

For bulbs wired in parallel, an advantage would be that if one fails/burns out the others will continue to light .

  For other appliances, if one fails the others will not be affected when wired in parallel.

Answer:

The blood cell will expand.

Explanation:

Given that,

Salt concentration = 0.5M

Solution concentration = 2M

We know that,

Hypertonic solution :

If the solution concentration is lower than the solute concentration then it is called hypertonic solution.

Hypotonic solution :  

If the solution concentration is higher than the solute concentration then it is called hypotonic solution.

We need to find what will happen to the blood cell

Using given data

The solution concentration is higher than the solute concentration.

So, The solution will be hypotonic solution.

We know that,

When a cell is placed in a hypotonic solution then the water will enter the cell, and the cell will expand.

Hence, The blood cell will expand.

Answer:

The blood cell will expand.

Explanation:

Just took a test.

{Hope this helps} : )

Answer:

getting shocked

Explanation:

i didnt really get the answer really much but i hope this helps

Answer:

Hair standing up

Explanation:

When there is a lot of static electricity, your hair stands up.

a) The relative atomic mass is 122.35 amu

b) The Rutherford model introduced the planetary model

c) The percentage abundance shows how much of that mass is present.

We have to know that as what we need here is the relative atomic mass of the element X then we must have to be able to look at the weighted average of all the isotopes that have been shown to belong to the element that is in question called X.

Thus we would have;

(121 * 0.432) + (123 * 0.531) + (129 * 0.037)

= 52.27 + 65.31 + 4.773

= 122.35 amu

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Given

F: Force

F = 10 N

angle = 60

Find the horizontal component of the force.

The horizontal x-axis is Fx = 8.66N

The estimated number of stars in the observable universe is about 1x10^22.

10 million can be written as  1,000,000,000 . It is expressed in scientific notation, it becomes 10 raised to 9= 1,000,000,000

The universe is made up of all of space, time, and everything that exists within them, including all of the planets, stars, galaxies, and other types of matter and energy. The prevailing cosmological explanation for the universe's formation is the Big Bang theory. The universe has been expanding ever since the Big Bang, which occurred 13.7870.020 billion years ago, according to this theory. Although the size of the entire universe's space is unknown, the observable universe's diameter, which is about 93 billion light-years at the moment, can be calculated.

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The estimated number of stars in the observable universe is about 1x10^22.

Scientific Notation

10 million can be written as  1,000,000,000 . It is expressed in scientific notation, it becomes 10 raised to 9= 1,000,000,000

What is an Universe?

The universe is made up of all of space, time, and everything that exists within them, including all of the planets, stars, galaxies, and other types of matter and energy. The prevailing cosmological explanation for the universe's formation is the Big Bang theory. The universe has been expanding ever since the Big Bang, which occurred 13.7870.020 billion years ago, according to this theory. Although the size of the entire universe's space is unknown, the observable universe's diameter, which is about 93 billion light-years at the moment, can be calculated.

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Answer:

3.75 m/s

Explanation:

Given that a bumblebee is flying to the right when a breeze causes the bee to slow down with a constant leftward acceleration of magnitude 0.50 m/s^2. After 2.0 s the bee is moving to the right with a speed of 2.75 m/ s

What was the velocity of the bumblebee right before the breeze?

Since the breeze blows with the acceleration of 0.5 m/s^2 for 2 seconds, we can calculate the magnitude of the velocity at which it moves.

Acceleration = velocity/ time

Substitute the acceleration and time into the formula

0.5 = V/2

Cross multiply

V = 2 × 0.5

V = 1 m/s

The bumblebee is travelling right ward while the wind travels leftward.

The relative velocity = 2.75 m/s

Let the bumblebee speed = Vb

While the wind = VW

Vb - Vw = 2.75

Substitute the wind speed into the formula

Vb - 1 = 2.75

Vb = 2.75 + 1

Vb = 3.75 m/s

Therefore, the velocity of the bumblebee right before the breeze is 3.75 m/s

When a neuron is at resting potential, the state of the electrical charge is negative inside the neuron compared to the outside

Because of an unequal distribution of ions like potassium (K+) and chloride (Cl-) inside and outside the neuron, the interior of the neuron is negatively charged at resting potential. The membrane of the neuron is selectively permeable, permitting certain ions to pass while preventing others from doing so. A gradient in electrochemistry results from this.

Ion channels, notably the sodium-potassium pump, which actively transfers sodium ions (Na+) out of the neuron and potassium ions (K+) into the neuron, are responsible for maintaining the resting potential. As a result, the neuron produces an excess of negative charge within and an excess of positive charge outside.

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Answer:

7657

Explanation:

b. FALSE

If the velocity of particle is high then they will collide with each other with a greater force because their momentum will be high

force is a push or pull on a body .

Momentum is the product of mass and velocity,

More the velocity, higher will be the momentum.

since force is  directly proportional to rate of change of momentum

F = Δp/Δt

so on when bodies having higher velocities collide their rate of change of momentum is higher hence more will be the force

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Answer:

D volume

Explanation:

I am pretty sure

Answer:

1428  m/s

Explanation:

Given that,

The frequency hear by a dolphin, f = 280 kHz

We need to find the speed of sound in water if a wave with this frequency has a wavelength  of 0.51 cm.

The formula for the speed in terms of wavelength and frequency is given by :

\(v=f\lambda\\\\v=280\times 10^3\times 0.51\times 10^{-2}\\\\v=1428\ m/s\)

So, the speed of sound in water is 1428  m/s.

The force that must be applied to the 50.0-kg crate on a frictionless plane inclined at 30 degrees to cause an acceleration of 2 m/s^2 down the plane will be approximately 50.84 N.

To determine the force that must be applied to a 50.0-kg crate on a frictionless plane inclined at 30 degrees to cause an acceleration of 2 m/s^2 down the plane, follow these steps:

1. Calculate the component of gravitational force acting along the inclined plane:
F_gravity = m * g * sin(theta)
where m is the mass (50 kg), g is the acceleration due to gravity (9.81 m/s^2), and theta is the incline angle (30 degrees).

2. Convert 30 degrees to radians:
theta_radians = 30 * (pi / 180)

3. Calculate the gravitational force component:
F_gravity = 50 * 9.81 * sin(theta_radians)

4. Calculate the net force required to achieve the desired acceleration down the plane:
F_net = m * a
where a is the desired acceleration (2 m/s^2).

5. Calculate the net force:
F_net = 50 * 2

6. Determine the applied force needed to achieve the desired acceleration:
F_applied = F_net - F_gravity

After calculating these values, you'll find that the force that must be applied to the 50.0-kg crate on a frictionless plane inclined at 30 degrees to cause an acceleration of 2 m/s^2 down the plane is approximately 50.84 N.

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If you were to mix roughly equal amounts of a granitic magma with a basaltic magma, the resultant magma would be intermediate in composition (andesitic).

If you were to mix roughly equal amounts of a granitic magma with a basaltic magma, the resultant magma would be intermediate in composition. The composition would be classified as andesitic.

Granitic magma is rich in silica (SiO2) and aluminum (Al) and has lower levels of iron (Fe) and magnesium (Mg). Basaltic magma, on the other hand, has lower silica content, higher levels of iron and magnesium, and lower aluminum content compared to granitic magma.

By mixing these two magmas, the resulting magma would have an intermediate composition, with a moderate amount of silica, aluminum, iron, and magnesium. This intermediate composition is characteristic of andesitic magmas, which are commonly found in volcanic arcs and convergent plate boundaries. Andesitic magmas exhibit properties and mineral compositions that fall between those of granitic and basaltic magmas.

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Answer:

-27.3 m/s

Explanation:

Given:

y₀ = 38 m

y = 0 m

v₀ = 0 m/s

a = -9.8 m/s²

Find: v

v² = v₀² + 2a (y − y₀)

v² = (0 m/s)² + 2 (-9.8 m/s²) (0 m − 38 m)

v = -27.3 m/s

Or, you can solve with energy.

PE = KE

mgh = ½ mv²

v² = 2gh

v = -27.3 m/s

form is an element of design that describes volume and mass ; the three dimensional aspects of objects that take up space is True.

Form is an element of design that refers to the three-dimensional aspects of objects, including volume and mass. It describes the physical shape and structure of an object, emphasizing its spatial presence and how it occupies and interacts with space. Form plays a crucial role in creating visual interest, defining the character of objects, and shaping the overall composition in various design disciplines, such as architecture, industrial design, and sculpture.

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The  the capacitance of the cable is 18 nF, when the resulting potential difference between the two conductors is 420 V.

The capacitance of a cable is 125 nF when the resulting potential difference between the two conductors is 60 V. If the resulting potential difference between the two conductors is 420 V, what is the capacitance, in nanofarads, of the cable

Given:

Capacitance, C = 125 nF

Initial potential difference, V1 = 60 V

Final potential difference, V2 = 420 V

To find:

The capacitance of the cable is given by the formula:

Capacitance, C = (Charge, Q) / (Potential difference, V)

Or,

Charge, Q = C × V

We know that,

Charge, Q1 = C × V1

Charge, Q2 = C × V2

If we divide Q2 by Q1, then we get:

C × V2 / C × V1

= Q2 / Q1

Or,

C × V2 / C × V1 = (Final charge) / (Initial charge)

From the principle of conservation of charge, we know that:

Charge cannot be created or destroyed; it can only be transferred from one place to another.

Therefore, the initial charge and final charge are the same.

So, we can say that:

Charge, Q2 = Charge, Q1

Hence, C × V2 = C × V1

Or,

C = V1 / V2 × C1

Substituting the values, we get:

C = 60 V / 420 V × 125nF

= 18 nF (approximately)

Therefore, the capacitance of the cable is 18 nF, when the resulting potential difference between the two conductors is 420 V.

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The distance between two lines in the grating is  0.00045 cm.

A diffraction grating is an optical element with a periodic structure used in optics that diffracts light into many beams that move in various directions. A type of structural coloring is the coloration that is emerging.

A good diffraction grating has 2210 lines/cm, that means,

The diffraction grating has 2210 lines in 1 cm.

Hence, the distance between two lines in the grating is = (1 ÷ 2210) cm

= 0.00045 cm.

Hence, the distance between two lines in the grating is  0.00045 cm.

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Answer:

31.25 m

25m/sec

Explanation:

Given :-

Time = 5sec

V = 0 (in going up)

U = 0 (in comming down)

Find :-

H and U by which it is thrown up

Since the total time is 5 sec ,therefore half time will be taken to go up and another half will be taken to go down .

We know that ,

V = U + gt

0 = U - 10*2.5

U = 25 m/sec

Also,

V² = U² +2gs

0 = 625 - 20s

s = 625/20 = 31.25 m

Answer:

That is, mechanical waves cannot travel through a vacuum. This feature of mechanical waves is often demonstrated in a Physics class. A ringing bell is placed in a jar and air inside the jar is evacuated. Once air is removed from the jar, the sound of the ringing bell can no longer be heard.

Through photosynthesis, the plant creates glucose, a type of sugar, from water and carbon dioxide from the air.

Chloroplasts, a type of organelle found in plant cells, convert light energy into chemical energy that is relatively stable through the photosynthetic process. They maintain life on Earth in this way.

Chlorophyll stands out among the many kinds of pigments found in nature because it gives plants the ability to absorb the energy they require to develop tissues.

Chlorophyll is found in the plant's microscopic chloroplasts, which are found in its cells. This is where photosynthesis takes place.

Therefore, water and carbon dioxide from the air into glucose.

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The change in enthalpy is  0 J/kg if the incompressible substance with a density of 1000 kg/m3 is isothermally compressed from 100 to 1000 kpa. Thus, option b is correct.

The given data is as follows:

The density of substance = 1000 kg/m3

In-compression pressure = 100 to 1000 kph

The given substance is incompressible. So its specific volume stays constant during the process. The work done is Zero.

Assuming that the process is Isothermal, the temperature remains steady.

The change in enthalpy is calculated by using the formula:

ΔH = m × C × ΔT

The density of mass is calculated by using the formula,

m = V × ρ = 1 m3 × 1000 kg/m3

m = 1000 kg

Change in enthalpy is calculated as:

ΔH = m × C × ΔT

ΔH = 1000 kg × 0 J/(kg·K) × 0 K

ΔH = 0 J/kg

Therefore we can conclude that the change in enthalpy is  0 J/kg.

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The complete question is-

an incompressible substance with a density of 1000 kg/m3 is isothermally compressed from 100 to 1000 kph. determine the change in enthalpy. multiple choice questions.

a.900 kj/kg

b. 0 kj/kg

c.10 kj/kg

d.0.9 kj/kg

Answer:

car fuel

production waste (like producing plastic, car, materials)

breathing

landfill

cement production

deforestation (cutting down trees)

burning of fossil fuels (coals, oil, natural gases)

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Explanation:

Answer:

No.

Explanation:

The cut cucumber is still a cucumber.

Answer:

Nope.

Explanation:

Chemical change is transforming the cucumber into a pickle. However, you need vinegar, so it isn't a full change.

Therefore, Mr. Mann would not be right either way, because all he did was cut a cucumber, and he should probably get some help with all this "chemical change".

Identification of compounds can benefit from density. It is also a useful feature since it connects (or acts as a conversion factor between) a substance's mass and volume. Volume and mass are extended (or extrinsic) qualities of matter that are quantity dependent.

The force of an air mass acting on the earth's surface is known as atmospheric pressure. Remember that wind currents are created when the densities of two separate air masses differ.

Our wind currents are driven by the atmospheric pressure density, and denser air exerts a higher pressure than less dense air. Compared to the cold and dry air, the warm and humid air is less dense. The less dense air will then float on top of the thicker air in certain regions.

Therefore, Warm air masses rise while cold air masses descend because they are less dense.

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The question is asking whether it is possible to find a magnetic vector potential for a given uniform surface current flowing in the xy plane and generating a magnetic field for different regions of space.

To determine whether it is possible to find a magnetic vector potential for the given scenario, we need to consider the conditions that must be satisfied. In general, a magnetic vector potential A can be found if the magnetic field B satisfies the condition ∇ × A = B. This is known as the magnetic vector potential equation.

In the given situation, the magnetic field is different for the regions above and below the xy plane. For z > 0, the magnetic field is described as B = MoK -î, and for z < 0, it is described as B = -MoK -î. To find the magnetic vector potential, we need to determine if there exists a vector potential A that satisfies the equation ∇ × A = B in each region.

By calculating the curl of A, we can check if it matches the given magnetic field expressions. If the curl of A matches the magnetic field expressions for both regions, then it is possible to find a magnetic vector potential for the given scenario. However, if the curl of A does not match the magnetic field expressions, then it is not possible to find a magnetic vector potential that satisfies the conditions.

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Okay, let's think this through step-by-step:

* The rate of energy transfer is 50 J/s

* We need to calculate the energy transferred in 4 seconds

* So we would calculate:

Energy in 4 seconds = Rate x Time

= 50 J/s x 4 s

= 200 J

So the heat energy produced within 4 seconds with an energy transfer rate of 50 J/s is 200 J.

Let me know if you have any other questions!