Name 3 things that can be taken to reduce erosion and keep our topsoil healthy?

Fluid pressure is converted to mechanical motion by allowing the fluid to flow from an area of high pressure to one of lower pressure. The motion of that flow can be converted to useful work by any number of devices inserted into that flow. Among these are various kinds of wings, turbines, and engines.

The second law of thermodynamics says that the entropy of a system is non-decreasing. In terms of fluid flow, that means a fluid will always flow from an area of high pressure to one of low pressure. The flow (mechanical motion) is a consequence of a difference in the fluid's pressure.

Bernoulli's principle tells us that within a horizontal flow, areas of higher-speed flow will have a lower pressure than areas of lower-speed flow. This principle is the basis for the operations of wings, sails, propellers, turbines, and similar devices that create differences in flow rate based on their shape. The shape is designed to cause the flow rate over one surface to be greater than over the other surface, creating a difference in pressure that is used to move the surface. Hence the wing converts fluid pressure to mechanical motion.

The wing of an airplane moves the plane vertically, putting or keeping it in the air. A sail is arranged so the fluid pressure is converted to motion in the desired direction, which direction can even be a few degrees off of "up wind" of the flow. A turbine is a collection of "wings" that are arranged so their motion rotates a shaft.

A cylinder consists of a barrel, a piston, and a piston rod. The barrel is where the fluid is contained. The piston is placed within the barrel, and is arranged so that it moves when fluid pressure is applied. The piston rod is a link between the piston and the point at which the movement is converted to useful work.

The piston rod itself may do the desired work of pushing, pulling, lifting or lowering, or it may be connected to a crankshaft to convert the linear motion to rotary motion.

The working fluid in a cylinder may be gas or liquid, including steam, the gas produced by a chemical reaction, water, or hydraulic fluid. Its flow and effect on the piston may be controlled by various valves.

Answer:

we call a foreign born resident of us a citizen

Answer:

The energy of the light is not higher than the work function. Then, the electrons are not emitted.

Explanation:

In order to calculate the maximum kinetic energy of the electrons for  photons of twice the wavelength of the light, you first calculate the wavelength of photons with energy of 6eV. You use the following formula:

\(E_p=h\frac{c}{\lambda}\)      (1)

c: speed of light = 3*10^8 m/s

λ: wavelength of the light

h: Planck's constant  in eV.s = 4.135*10^-15 eV.s

E: energy of the photons = 6eV

You solve the equation (1) for λ:

\(\lambda=\frac{hc}{E}=\frac{(4.135*10^{-15}eV)(3*10^8m/s)}{6eV}\\\\\lambda=2.06*10^{-7}m\)

Next, you calculate the energy of photons with twice the wavelength:

\(E_p'=h\frac{c}{2\lambda}=(4.135*10^{-15}eV)\frac{3*10^8m/s}{2(2.06*10^{-7}m)}\\\\E_p'=3.0eV\)

Next, you calculate the work function of the metal by using the equation for the photo electric effect:

\(K=E_p-\Phi\)       (2)

Ф: work function

Ep: energy of the photons = 6eV

K: kinetic energy of emitted electrons = 2eV

You solve for Ф:

\(\Phi=E_p-K=6eV-2eV=4eV\)        (3)

Finally, you calculate the kinetic energy of the emitted electron by the metal when the light with energy Ep' is used:

\(K=E_P'-\Phi=3.0eV-4eV\)

It is clear that for a light with energy 3.0eV has an energy lower than the work function of the metal, then, the electrons are not emmited by the metal

The sound signal helps to caution and let other people know the exact

position or location during sailing in limited visibility conditions.

Sailors are in which charge of controlling and movement of ships. In limited

visibility conditions such as during fogs, one prolonged blast plus two short

blasts every two minutes are done.

This helps to alert people and other sailors of their location at sea to prevent

accidents and death.

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The sound signal helps to know the exact location during sailing in foggy conditions.

Sailors are the in charge of controlling and movement of ships. In limited visibility conditions such as fogs, one prolonged blast plus two short blasts every two minutes are done.

This helps to caution people and other sailors around their location at the sea to prevent accidents and death.

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Answer:

20 20 20 20 25 points 20 20 20 25 points

Explanation:

The distance car will cover at the given speed and time will be distance = 3.8 m.

To calculate distance using formula,

s = d / t

where,

s is speed

d is distance

t is time

So, known in this are

s = 20m/s

t = 0.19 s

d = ?

Now, putting values,

speed = distance / time

20 m/s = distance / 0.19 sec

distance = 20 m/s x 0.19 sec

distance = 3.8 m

The proportion of a distance (regardless of direction) traveled to the time needed to cover that distance.

Speed, expressed in terms of meters per second, is the rate at which an object's position changes. An object moves one meter in one second, for instance, if it starts at the origin and moves three meters in three seconds. Simple division of time by distance yields the equation for speed.

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Radioactive tritium (3H) labeled guanine is indeed used to measure the rate of biochemical processes that involve its binding or incorporation.

In this context, the best site for tritium labeling would be at the C8 position of the guanine molecule. This is because the C8 position is less likely to undergo exchange with the solvent (water) and maintains the integrity of the labeled guanine throughout the experiment. The best site for tritium labeling in this type of experiment would be the 8th position of the guanine molecule. This is because the 8th position is involved in biochemical processes such as base-pairing and is also solvent-accessible, allowing for efficient incorporation of the radioactive tritium.

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We can calculate the conductivity of the metal by using the formula From the problem, we can get the following information: Length of the wire, L = 1.5 m Voltage, V = 9.0 V Drift velocity, (we need to convert it to m/s.

1 mph = 0.44704 m/s70 mph = 31.2928 m/s Now we can calculate the electron density using the equation The number of atoms per unit volume, n, is MA, where MA is the atomic mass.

From the formula, we can calculate the conductivity by;σ = J/E, where J is the current density and E is the electric field strength. We can relate them to v and n as follows

J = nqvd and

E = V/Lσ = nqvd/(V/L)σ = nqLvd/V

Solving for σ,

σ = nqLvd/V

σ = (8.49 × 1028 m-3) × (1.6 × 10-19 C) × (1.5 m) × (31.2928 m/s)/(9.0 V)

σ = 9.59 × 106 S/m

The conductivity of copper is approximately 5.96 × 107 S/m. Thus, the factor by which the conductivity of the metal is larger than copper is; FC = σmetal/σcopperFC = (9.59 × 106 S/m)/(5.96 × 107 S/m)FC = 0.16 (approximately)Therefore, the conductivity of the metal would be about 0.16 times that of copper.

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The Mass of the car = 782.1 Kg

The mass of the car is calculated as follows:

The force on the car = 6570 N

The acceleration of the car, a = 38 - 0/4.5

acceleration = 8.44 m/s²

Mass of the car = 6570/8.44

Mass of the car = 782.1 Kg

In conclusion, the mass of the car is obtained from the acceleration and force on the car.

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Answer:

35

Explanation:

total magnification = eyepiece lens x objective lens

TM = 10X x 25X

TM = 250X

Electromagnetic radiation can be viewed as a stream of particles called photons.

Photons are discrete energy quanta connected with electromagnetic waves; the quantity of energy they carry varies depending on the frequency or wavelength. Modern physics places a lot of emphasis on the study of photon behaviour, which has a variety of uses, including the creation of new technologies like lasers, solar cells, and imaging devices for medical use.

Electric and magnetic fields combine to form electromagnetic radiation, a form of energy that moves in waves. It can be thought of as a stream of photon-like particles. While photons lack mass, they do possess energy and velocity. The frequency of the radiation affects the energy of a photon, with higher frequency radiation producing photons with more energy. Electromagnetic radiation interacts with matter through the absorption and emission of photons. Numerous uses of electromagnetic radiation exist, including those in communications, imaging technology, and astronomy.

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The friction force acting on the firefighter sliding down a vertical pole is approximately 222.6 N.

To find the friction force, we need to analyze the forces acting on the firefighter. In this case, the firefighter is sliding down a vertical pole, so the gravitational force (mg) is acting downward. Additionally, there is a friction force (f) acting in the upward direction opposing the motion.

According to Newton's second law, the net force acting on an object is equal to the product of its mass and acceleration. In this case, the net force is the difference between the gravitational force and the friction force:

Net force = mg - f

Given:

Mass of firefighter (m) = 78 kg

Acceleration (a) = 3.0 m/s²

We can rearrange the equation to solve for the friction force:

f = mg - ma

Substituting the given values, we have:

f = (78 kg)(9.8 m/s²) - (78 kg)(3.0 m/s²)

Calculating the expression, we find that the friction force is approximately 222.6 N.

Therefore, the friction force acting on the firefighter sliding down the vertical pole is approximately 222.6 N. It opposes the motion and helps control the acceleration of the firefighter.

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Answer:

It's very simple- 8 valence electrons

Answer:

it's 8

Explanation:

that the answer for the question

If the distance between two objects is 4.00 m and the distance is tripled, then the new distance will be 12.00 m.

To find out the new distance, you need to multiply the original distance by the factor by which it is tripled, which is 3.In other words, if the distance between two objects is "d", and it is tripled, then the new distance is 3d.

Using this formula, if the original distance is 4.00 m, then the new distance will be 3 x 4.00 m = 12.00 m.

The new distance is three times the original distance.

Therefore, the new distance between the two objects will be 12.00 meters if the original distance was 4.00 meters and it was tripled.

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The speed of ball when the catcher catches it is 120km/h.

Speed is the rate of change of displacement with respect to time.

In this case, if the acceleration is constant, use the third equation of motion to determine the initial and final velocities.

The third equation of motion is

v² - u² = 2gS

where v---> final velocity

u---> initial velocity

g---> gravitational acceleration

S---> height

Given Data:

Initial Velocity of the Ball (u) = 120 km/h

Initially the ball is moving up, so the acceleration of the ball is g = - 9.81 m/s²

The final velocity of the ball is v = 0 m/s

The height of the ball above the ground can be calculated by using above formula

0 - (120×5/18 m/s)^2 = 2× (-9.81 m /s²) × S

=> S = 56.7 m

When the ball is above the hit point, the initial velocity of the ball at this point is u = 0 m/s.

Using above relation we can calculate the final velocity,

56.7 × 2 × (9.81) = v²-0 = v²

=> v² = 1112.45 m/ s => v= 33.45 m/ s

or v = 120 km/h.

Therefore the velocity of the ball when caught by the catcher is 120 km/h.

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The three characteristics that all the plants most likely share are: have xylem and phloem; lack pollen. Option D.

In seed plants, xylem and phloem are essential vascular tissues responsible for the transport of water, nutrients, and sugars throughout the plant. Xylem transports water and minerals from the roots to the rest of the plant, while phloem carries sugars and other organic compounds from photosynthetic regions to other parts of the plant.

The absence of pollen indicates that these plants do not reproduce through the production and dispersal of pollen grains. Instead, they likely reproduce through other means, such as the production of seeds.

This combination of having xylem and phloem while lacking pollen suggests that the plants in question are likely gymnosperms. Gymnosperms are a group of seed plants that include conifers, cycads, ginkgoes, and others. These plants typically produce seeds that are not enclosed within a fruit, and they rely on other methods such as wind or insects for pollination.

It is important to note that this conclusion is based on the provided information and is subject to change depending on further details about the specific characteristics of the gathered plants. SO Option D is correct.

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The thermal capacitance of the coil is neglected with respect to the tank wall and the tank liquid. Energy balance is done only on the tank liquid. Option C is the correct answer.

The consequence of neglecting the thermal dynamics of the cooling coil in a stirred tank can vary depending on the specific situation and the magnitude of the neglected effects. However, in general, neglecting the thermal capacitance of the cooling coil in relation to the tank wall and the tank liquid can have the following consequences:

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Answer:

This one's easy

The final velocity of the truck and the sedan together is +7.19 m/s. This can be calculated using the law of conservation of momentum: m1v1 + m2v2 = (m1+m2)vf, where m1 and m2 are the masses of the truck and the sedan respectively, v1 is the velocity of the truck, v2 is the velocity of the sedan (which is 0 in this case) and vf is the final velocity of the truck and the sedan together.

Answer:

height = 1.5 x 10⁶ m = 1500 km

Explanation:

We can use the formula of gravitational force from the Newton's Gravitational Law:

\(F = \frac{Gm_{1}m_{2}}{r^2}\)

where,

F = Gravitational Force = 6.6 x 10³ N

G = Universal Gravitational Constant = 6.67 x 10⁻¹¹ N.m²/kg²

m₁ = mass of earth = 6 x 10²⁴ kg

m₂ = mass of satellite = (1.02 tons)(1000 kg/1 ton) = 1.02 x 10³ kg

r = distance between center of earth and satellite = ?

Therefore, using these values in the equation, we get:

\(6.6\ x\ 10^3\ N = \frac{(6.67\ x\ 10^{-11} N.m^2/kg^2)(6\ x\ 10^{24} kg)(1.02\ x\ 10^3\ kg)}{r^2}\\\\r^2 = \frac{(6.67\ x\ 10^{-11} N.m^2/kg^2)(6\ x\ 10^{24} kg)(1.02\ x\ 10^3\ kg)}{6.6\ x\ 10^3\ N}\\\\\)

\(r = \sqrt{61.84\ x\ 10^{12}\ m^2 }\)

\(r = 7.86\ x\ 10^6 m\)

The distance between center of earth and the satellite is equal to the sum of height of satellite and radius of earth:

\(r = height + radius\ of\ earth\\7.86\ x\ 10^6 m = height + 6.36\ x\ 10^6 m\\height = 7.86\ x\ 10^6 m - 6.36\ x\ 10^6 m\)

height = 1.5 x 10⁶ m = 1500 km

Answer:

Explanation:

You can plot their change in position per unit of time. By taking the slope of this graph, you can figure out the velocity at any point

ANSWER:

2.98 cm

STEP-BY-STEP EXPLANATION:

Given:

Length wire (L) = 6 m

Current (i) = 1.513 A

magnetic field (β) = 4.085 mT = 4.085 x 10^-3 T

Magnetic field at the center of circular coil is given for the following formula:

The total length of wire in the coil is given by:

We replacing:

Therefore, the diameter in centimeters is equal to 2.98 cm

When a light rain falls after oil and gasoline have leaked onto the road surface, it can cause the car to become less responsive and more difficult to control.

This is because the oil and gasoline act as a slippery layer on the road surface, which reduces the friction between the tires and the road. The rainwater can then mix with the oil and gasoline, making the layer even more slippery and reducing the vehicle's grip on the road.

To help mitigate this issue, drivers should be aware of their surroundings and the potential for slippery surfaces, and should adjust their speed and driving accordingly. Additionally, using tires with greater tread, or using more aggressive tires designed for wet and slippery conditions, can also help increase the vehicle's grip on the road.

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The nylon string on the tennis racket is lengthened by 10.7 mm from its untensioned length of 30.0 cm.

To calculate the amount of lengthening of a nylon string on a tennis racket under tension of 275 N, we can use the formula:
ΔL = FL/AY
Where ΔL is the change in length, F is the tension force applied, L is the original length, A is the cross-sectional area of the string, and Y is Young's modulus.
The cross-sectional area of the string can be calculated using the formula:
A = πr^2

Where r is the radius of the string, which is half the diameter. So,
r = 0.5 mm = 0.0005 m
A = π(0.0005)^2 = 7.85 x 10^-7 m^2
Now, plugging in the values, we get:
ΔL = (275 N)(0.3 m)/(7.85 x 10^-7 m^2)(3 x 10^8 N/m^2)
Simplifying, we get:
ΔL = 0.0107 m = 10.7 mm

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Answer:

Cell membrane

Explanation:

The fastest rollercoaster in the world is the formula rossa in abu dhabi, united arab emirates, speed of this is 240 km/h (149.1 mph)

The rate at which an object's distance traveled changes is measured by its speed. In terms of measurement, speed is a scalar, meaning it has magnitude but no direction. Speed is the rate at which an object moves over a given distance. a thing that travels at a high rate of speed and covers a lot of distance quickly. A slow-moving object, on the other hand, travels a comparatively short distance in the same amount of time when moving at a low speed. An object with zero speed is completely immobile.

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Polaris, or the North Star, is special because it is the closest bright star to the north celestial pole and can be used to determine longitude on Earth.

Polaris is unique because it appears almost stationary in the sky, remaining at a fixed point in the northern sky while all other stars appear to rotate around it due to the Earth's rotation. This is because it is located very close to the north celestial pole, which is the point in the sky directly above the Earth's North Pole.

Polaris has also been used by sailors and navigators for centuries to determine their longitude, as it is always visible in the northern hemisphere and its position in the sky changes predictably with longitude. By measuring the angle between Polaris and the horizon, sailors could calculate their position on Earth. This made Polaris an important tool for early navigation and exploration, and it continues to be used for celestial navigation today.

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The following denotes the massive, positively charged, nuclear particles is protons. A proton is a subatomic particle having a mass of 1.0072766 amu and a positive charge equal in magnitude to that of an electron but of opposite sign.

Protons are located in the nucleus of an atom and are made up of quarks. They are heavier than neutrons, which are the other subatomic particles present in the nucleus of an atom. Electrons, on the other hand, are negatively charged particles that orbit around the nucleus of an atom. They are much lighter than protons and neutrons and are located in the electron cloud outside the nucleus. Isotrons are not real particles. They are not listed in any dictionary of particle physics, nor have they been discovered in any experiment. Neutrons, on the other hand, are subatomic particles that have no charge. They have a mass of 1.008664 amu and are located in the nucleus of an atom along with protons.

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To answer this question, we need to use the formula that relates force, mass, and acceleration: F=ma. We can rearrange this formula to solve for acceleration: a=F/m.

In this case, we are given that the force applied by the motor is 13.9N, and we need to find the velocity at which it will pull a mass. We are not given the mass directly, but we can calculate it using the power of the motor (300W) and the velocity we are trying to find.

Power is defined as the rate at which work is done, or P=W/t, where W is the work done and t is the time it takes to do that work. In this case, we can assume that the work done is moving the mass a certain distance, and we can use the velocity to calculate the time it takes to do that work. So, we have:

P=Fv

where P=300W, F=13.9N, and v is the velocity we want to find. Rearranging this equation gives:

v=P/F

Now we can substitute in the values for P and F to get:

v=300/13.9

v≈21.6 m/s

So, at a velocity of 21.6 m/s, a 300.W motor applying a force of 13.9N can pull a mass.

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Answer:

Acceleration = 29 m/s^2, Force = 203 N

Explanation:

The acceleration is given to you in the problem.

If you're trying to find the force and not acceleration:

1. Find the equation for force.

F = ma

2. Plug in what has been given to you in the problem.

F = 7kg × 29m/s^2

F = 203 N

Remember:

Newton = kg × m/s^2