Answer:
Viscosity is the state of being thick, sticky, and semifluid, because of friction. A example is honey or syrup.
A hydraulic system is designed to lift a maximum weight of 10,000 N. If the output piston has a diameter of 10 cm, what should be the diameter of the input piston?
A fireman standing on a 10 m high ladder. operates a water hose with a round nozzle of diameter 2.74 inch. The lower end of the hose (10 m below the nozzle) is connected to the pump outlet of diameter 4.19 inch. The gauge pressure of the water at the pump is P(gauge) pump = P (abs) pump − Patm = 50.3 PSI = 346.806 kPa. Calculate the speed of the water jet emerging from the nozzle. Assume that water is an incompressible liquid of density 1000 kg/m3 and negligible viscosity. The acceleration of gravity is 9.8 m/s^2. Answer in units of m/s.
Answer:
The speed of the water jet emerging from the nozzle can be calculated using Bernoulli's equation as follows:
V^2 = 2gP(gauge) pump/ρ
Substituting the given values in the above equation, we get
V^2 = 2*9.8*346.806*1000/1000
V = 166.905 m/s
A6 kg block moves with a constant speed 5 m/s on a horizontal frictionless surface and collides elastically with an identical block initially at rest. The second block collides and sticks to the last 6 kg block which was initially at rest.
What is the speed of the second 6 kg block after the first collision? What is the speed of the third 6 kg block after the second collision?
For the first 6 kg block, the speed after the collision will be 2.5 m/s. For the second 6 kg block, the speed after the collision will be zero since it sticks to the first 6 kg block.
What is Speed?Speed is a measure of how quickly an object moves or how quickly a task is performed. It is usually measured in units of distance per unit of time, such as metres per second, miles per hour, or kilometres per hour. Speed is an important concept in physics and is used to describe motion of all kinds, from elementary particles to everyday objects such as cars, planes, and rockets.
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An astronomy textbook, when printed out, weighs four pounds on the surface of the Earth. After finishing your course, you are so tired of the book, you arrange for NASA to shoot it into space. When it is twice as far from the center of the Earth than when you were reading it, what would it weigh? (Note, assume that the book has been moving away from the Earth, not falling freely around it.)
The book will weigh 1 pound when it is twice as far from the center of the Earth as when it was on the surface.
Weight of objects in spaceThe weight of an object depends on its mass and the gravitational force acting on it. Near the surface of the Earth, the gravitational acceleration is approximately 9.8 m/s^2. We can use the inverse square law to calculate the gravitational force on the book when it is twice as far from the center of the Earth than when it was on the surface:
F = G * (m1 * m2) / r^2
where F is the gravitational force, G is the gravitational constant, m1 is the mass of the Earth, m2 is the mass of the book, and r is the distance between the center of the Earth and the book.
Since the mass of the book remains the same, the weight of the book on the surface of the Earth is simply the force of gravity acting on it:
W = m * g
where W is the weight of the book, m is its mass, and g is the gravitational acceleration near the surface of the Earth.
When the book is twice as far from the center of the Earth, the gravitational force on it is:
F' = G * (m1 * m2) / (2r)^2 = F / 4
Therefore, the weight of the book when it is twice as far from the center of the Earth is:
W' = (m * g) * (F' / F) = (m * g) * (1/4) = 1 pound
So the book would weigh one pound when it is twice as far from the center of the Earth than when it was on the surface.
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Polar coordinates are used for planes. Extending this system into three dimensions in the simplest way results in a cylindrical coordinate system. A cylindrical coordinate system uses the same r and as in polar coordinates, with an added dimension along to the z-axis. The three coordinates that define a point in a cylindrical coordinate system is the triple (r, , z). Consider a point in the three-dimensional Cartesian coordinate system, (3, −4, 6) cm. Dacia and Katarina compute the corresponding point in a cylindrical coordinate system, whose origin corresponds to the origin in the Cartesian system. Which point do they find?
Answer:
Explanation:
Cartesian coordinates Cylindrical coordinate
The painting the starry night by vincent van gogh is rectangular in shape with height 29 inches and width 36. 25 inches. If a reproduction was made where each dimension is the corresponding original dimension, what is the height of the reproduction, to the nearest hundredth of an inch?.
The height of the reproduction is 29 inches, which is the same as the height of the original painting with dimensions.
To find the height of the reproduction of Vincent Van Gogh's painting "The Starry Night," we can use the concept of proportional scaling. Since the reproduction has the same dimensions as the original painting, the ratio of the height and width of the reproduction must be the same as the ratio of the height and width of the original painting.
The ratio of height to width of the original painting can be calculated as:
29 / 36.25 = 0.8
Therefore, the ratio of height to width of the reproduction must also be 0.8. We can set up a proportion to solve for the height of the reproduction, which we'll call h:
h / 36.25 = 0.8
To solve for h, we can multiply both sides by 36.25:
h = 36.25 * 0.8
h = 29
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In a shipping company distribution center, an open cart of mass 50.0 kg is rolling to the left at a speed of 5.00 m/s. You can ignore friction between the cart and the floor. A 15.0 kg package slides down a chute that is inclined at 37º from the horizontal and leaves at the end of the chute with a speed of 3.00 m/s. The package lands in the cart and they roll off together. If the lower end of the chute is a vertical distance of 4.00 m above the bottom of the cart, what are (a) the speed of the package just before it lands in the cart (b) the final velocity of the cart?
An open cart with a mass of 50.0 kg is moving to the left at the a speed of 5.00 m/s at a freight company distribution centre. Don't think about the cart's contact with the floor
Fast speed test: What is it?
Your current Web speed can be estimated with the FAST.com speed test. For users who are accessing content online, download speed is extremely important, and we want Suitable for the target market to be an incredibly easy and quick speed test. Your download speed and link latency can be seen when you select.
What is an object's speed?
The speed that an object travels a distance can be conceived of as its speed. A slow-moving object travels a relatively short distance in a given length of time, whereas a fast-moving object travels a big distance in a short amount of time.
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A 6.0-kg rock is dropped from a height of 9.0 m. At what height is the rock's kinetic energy twice its potential energy?
Answer:
When the rock is dropped from a height of 9.0 m, its initial potential energy is given by
PE = mgh = (6.0 kg)(9.8 m/s^2)(9.0 m) = 534 J
We can solve for the height at which the kinetic energy of the rock is twice its potential energy by setting the kinetic energy equal to twice the potential energy and solving for h.
KE = 1/2 mv^2 = (1/2)(6.0 kg)(v^2)
2 * PE = 2 * (6.0 kg)(9.8 m/s^2)(h)
Substituting and solving for h yields
h = 15 m
A hydraulic system is designed to lift a maximum weight of 10,000 N. If the output piston has a diameter of 10 cm, what should be the diameter of the input piston?
In a 42 s interval, 597 hailstones strike a glass window of area 0.597 m2 at an angle 50◦ to the window surface. Each hailstone has a mass of 6 g and speed of 6.3 m/s. If the collisions are elastic, find the average force on the window.
Answer in units of N.
The earth's crust is made of tectonic plates. These plates are constantly in motion. How are earthquakes related to the movement of tectonic plates?.
Earthquakes are related to the movement of tectonic plates, as the plates' motion can cause stress to build up in the crust, leading to sudden movements along faults, resulting in earthquakes.
Tectonic plates are constantly moving, driven by convection currents in the mantle. As plates move, they can rub against each other, causing friction and stress to build up along their boundaries. This stress can eventually overcome the strength of the rocks, resulting in sudden movements along faults, which are zones of weakness in the crust.
These sudden movements release energy in the form of seismic waves, causing the ground to shake, resulting in an earthquake. Therefore, earthquakes are directly related to the movement of tectonic plates and occur most frequently along plate boundaries.
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which of the following statements are true? check all that apply. which of the following statements are true?check all that apply. the first law of thermodynamics extends the principle of conservation of momentum to include molecular collisions. the work done by a thermodynamic system depends only on the initial and final states of the system. the amount of heat added or removed from a thermodynamic system depends on the path taken on a pv diagram. the first law of thermodynamics extends the principle of conservation of energy to include heat as well as mechanical energy. the amount of heat added or removed from a thermodynamic system depends only on the initial and final states of the system. the work done by a thermodynamic system is equal to the area under the curve on a pv diagram.
The following statements are true: The first law of thermodynamics extends the principle of conservation of energy to include heat as well as mechanical energy.
The work done by a thermodynamic system is equal to the area under the curve on a pv diagram.
The amount of heat added or removed from a thermodynamic system depends only on the initial and final states of the system.
What is thermodynamics?Thermodynamics is a branch of physics that deals with the relationships between heat, energy, and work. It focuses on the behavior of systems of matter and energy and their interactions with each other. It is widely used in fields such as chemistry, engineering, and materials science to understand and predict the behavior of complex systems.
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5. A schoolyard teeter-totter with a total length of 5.2 m and a mass of 38 kg is pivoted at its center. A 19kg child sits on one end of the teeter-totterWhere should a parent push vertically downward with a force of 210 N in order to hold the teeter-totter level?
The parent should push vertically downward at a distance of 4.66 m from the pivot point in order to hold teeter-totter level.
What is force?Force can be a push or a pull that is always with magnitude and direction.
As, Fp × x - Mg × d - mc × (L - x) = 0
Fp is force applied by the parent, x is distance from the pivot point to the point where the parent applies force, Mg is weight of the teeter-totter, mc is the weight of the child, and L is length of the teeter-totter.
Fp × x - (38 kg × 9.81 m/s²) × 2.6 m - (19 kg × 9.81 m/s²) × (5.2 m - x) = 0
Fp × x - 976.68 N × m - 185.58 N × m + 183.39 N × m = 0
Fp × x = 978.87 N × m
x = 978.87 N × m / Fp
So, x = 978.87 N × m / 210 N = 4.66 m
Therefore, the parent should push vertically downward at a distance of 4.66 m from the pivot point in order to hold the teeter-totter level.
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An ice skater initially skating at a velocity of 3 m/s speeds up to a velocity of 5 m/s. The momentum of the skater.
"An ice skater initially skating at a velocity of 3 m/s speeds up to a velocity of 5 m/s. The momentum of the skater increases." Correct option is B.
Momentum is given by the equation,
P = mv
where,
m is mass
v is velocity
As mass is maintained constant, the momentum from the given equation is directly proportional to the velocity of the ice skater.
If the velocity of the ice skater increases, then the momentum of the ice skater also increases.
In this problem, the velocity of the ice skater which was initially 3 m/s increases to 5 m/s.
This means that the momentum of the ice skater also increases.
Thus, the momentum tends to increase as velocity increases. The correct option is B.
The given question is incomplete. The complete question is 'A. Remains the same B. Increases C. Becomes zero D. Decreases'
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in the following questions you will be asked to rank these rods. if multiple rods rank equallly use the same rank for each then exclude the intermediate ranking
a.) From greatest to least in order of the strength of the electric field they contain:
Rod 1 (L, 3d, V)
Rod 3 (3L, 2d, 2V)
Rod 2 (2L, d, 2V)
What kind of accounting system only keeps track of transactions when money is used to pay for things and when it is used to make purchases?Inversely proportional to the distance between the charges, the field strength is proportional to the potential difference.
As a result of its relatively small diameter and large potential difference, rod 1 has the strongest electric field. Due to its longer length, which offsets its larger diameter, Rod 3 has the second-highest electric field strength, while Rod 2 has the lowest due to its larger diameter and smaller potential difference.
b.) Ranking by current density within them (greatest to least):
Rod 2 (2L, d, 2V)
Rod 1 (L, 3d, V)
Rod 3 (3L, 2d, 2V)
Inversely proportional to the rod's length and cross-sectional area, the current density is proportional to the potential difference. Because of its smaller cross-sectional area and longer length, Rod 2 has the highest current density. This is due to its smaller diameter. Due to its smaller diameter than Rod 3, Rod 1 has the next highest current density, and Rod 3 has the lowest current density as a result of both its larger diameter and length.
c.) Ranking by drift speed of electrons through them (greatest to least):
Rod 3 (3L, 2d, 2V)
Rod 1 (L, 3d, V)
Rod 2 (2L, d, 2V)
The amount of current flowing through a device affects how quickly electrons drift, while the cross-sectional area of a rod has an adverse effect. Because of its smaller diameter and consequently smaller cross-sectional area, which makes up for its longer length, Rod 3 has the highest electron drift speed of all the rods.
Due to its smaller diameter than Rod 2 and longer length, Rod 1 has the next-highest electron drift speed, and Rod 2 has the lowest electron drift speed.
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Complete Question:
In the following questions, you will be asked to rank these rods. If multiple rods rank equally, use the same rank for each, then exclude the intermediate ranking (i.e. if objects A, B, and C must be ranked, and A and B must both be ranked first, the ranking would be A:1, B:1, C:3). If all rods rank equally, rank each as '1'.
Organ pipe A, with both ends open, has a fundamental frequency of 300 Hz. The third harmonic of organ pipe B, with one end open, has the same frequency as the second harmonic of pipe A. How long are (a) pipe A and (b) pipe B?
(a) To find the length of pipe A, we can use the formula for the fundamental frequency of an open pipe:
f = v/2L
where f is the
frequency
, v is the speed of sound in air, and L is the length of the pipe.
We know that f = 300 Hz and that the pipe is open at both ends, so the first harmonic (or fundamental) frequency is given by:
f1 = v/2L
Substituting the given values:
300 Hz = v/2L
Solving for L:
L = v/2f
We can use the known value of the speed of sound in air at room temperature, which is approximately 343 m/s, to get:
L = 343 m/s / (2 x 300 Hz) = 0.572 m
Therefore, the length of pipe A is 0.572 m.
(b) To find the length of pipe B, we can use the formula for the frequency of a pipe with one end open:
f = (2n - 1)v/4L
where n is the harmonic number (i.e., 1 for the fundamental frequency, 2 for the second harmonic, 3 for the third harmonic, etc.).
We know that the third harmonic of pipe B has the same frequency as the second harmonic of pipe A, so:
(2 x 2 - 1)v/4LB = (2 x 1)v/2LA
5v/4LB = v/LA
Substituting the known value of LA from part (a), we get:
5v/4LB = v/(0.572 m
LB = 4/5 x 0.572 m = 0.458 m
Therefore, the length of pipe B is 0.458 m.
What is the formula for the frequency of an open pipe with one end closed, and how is it used to find the length of pipe B in this problem?The formula for the frequency of a pipe with one end open is f = (2n - 1)v/4L, where n is the harmonic number. To find the length of pipe B in this problem, we use the fact that the third harmonic of pipe B has the same frequency as the second harmonic of pipe A, and we set the two equations for these frequencies equal to each other.
What is the speed of sound in air at room temperature, and how is it used to find the length of pipe A in this problem?The speed of sound in air at room temperature is approximately 343 m/s. To find the length of pipe A in this problem, we use the formula for the fundamental frequency of an open pipe, which involves the speed of sound, and we solve for the length of the pipe.
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A pulley consists of a large disk of radius R and a small disk of radius r that are welded together and mounted on a horizontal frictionless axle through their common centers. The moment of inertia of this pulley is I. A box containing a turkey of mass M is suspended from a rope wound around the large disk; a box containing a pumpkin of mass m is suspended from a rope wound around the small disk. The ropes do not slip on the disks. The system is released from rest and the turkey begins to descend, while the pumpkin is being lifted up.
Use forces and torques to derive an expression for the angular acceleration of the pulley, in terms of system parameters
The angular acceleration of the pulley is given by the expression α = (MgR - mgr) / I.
The forces acting on the system are the gravitational forces on the turkey and the pumpkin, which are Mg and mg, respectively. T
These forces create torques on the pulley, with the torque on the large disk being MgR and the torque on the small disk being -mgr. The negative sign on the torque of the small disk indicates that it is acting in the opposite direction of the torque on the large disk.
The sum of these torques is equal to the moment of inertia of the pulley times its angular acceleration, which can be written as:
MgR - mgr = Iα
Solving for the angular acceleration, α, we get:
α = (MgR - mgr) / I
This is the expression for the angular acceleration of the pulley in terms of the system parameters. It shows that the angular acceleration depends on the masses of the turkey and the pumpkin, the radii of the large and small disks, and the moment of inertia of the pulley.
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A scientist has a sample of an unknown gas. In order to identify the gas, he looks at the spectrum of visible light emitted from it when it is heated. This is shown in the figure. Also shown in the figure are the emission spectra of five pure, gaseous elements. Which of the five elements is the unknown gas?
A. Xenon
B. Argon
C. Oxygen
D. Helium
E. Neon
In the scientist sample of unknown gas when he looks at the spectrum of visible light is xenon.
SpectrumThis spectrum appears to be much more promising. To begin with, we can observe that there are no absorption lines in this wavelength range in the spectra of xenon at these short wavelengths below around 470 nanometers where we have no absorption lines in the spectrum from the mystery gas. Similar to how there are numerous lines in the spectra of the unidentified gas at longer wavelengths starting at around 610 nanometers and upward, xenon's spectrum contains numerous lines as well. This similarity in absorption spectra identifies xenon as the unidentified gas.For more information on xenon kindly visit to
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Describe the associated artifacts -- the stone tools, cooking pots, etc. and the analysis conducted to determine their role in cannibalism.
Stone tools, kitchen implements, and other relevant artefacts, as well as the examinations carried out to determine their role in cannibalism.
How do you cook food?The procedure for preparing food. I cook the majority of the meals for our household. Cuisine describes a method of preparing food. a technique used in French cooking. foods associated to cooking. The state of English cooking: The intense flavours you're looking for come from a good pan that has been heated to an extreme temperature. the relationship between cooking skills and food choices.
What kinds of stone tools are there?There are two categories of stone tools: flaked stone tools, such as knives, scrapers, and projectile points, and ground stone tools, such as manos (grinding stones-left) & hand axes (arrow heads and spear points-above). The three basic components of a point are the stem, base, and blade.
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find the acceleration of the elevator (magnitude and direction).express your answer with the appropriate units. enter positive value if the direction of the acceleration is upward and negative value if the direction of the acceleration is downward.
The acceleration of the elevator is -2.2 m/s2 downwards.
What is Acceleration?Acceleration is a vector quantity that describes the rate of change of an object's velocity over a period of time. It is measured in metres per second squared (m/s2). Acceleration is not the same as speed, which is the rate at which an object moves in a particular direction. Acceleration can be either positive (speeding up) or negative (slowing down) and is caused by an applied force, such as friction or gravity. The acceleration of an object changes with time and is dependent on the object's mass, drag, and the force that is applied to it.
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QUESTION 2
What are propagating in electromagnetic waves?
Electric field and magnetic field.
Electrons.
Positive charges.
Air.
Electromagnetic waves propagate through the interaction of : A. electric and magnetic fields.
What are propagating in electromagnetic waves?Electric and magnetic fields: As the electric field oscillates, it creates a changing magnetic field, and vice versa. These changing fields propagate through space, creating a self-sustaining wave that can travel through a vacuum or a medium such as air.
Electrons are not directly involved in the propagation of electromagnetic waves, but they can be affected by the waves as they interact with matter.
Positive charges also do not directly participate in the propagation of electromagnetic waves, but they can be influenced by the electric field component of the wave.
Air or any other medium does not play an active role in the propagation of electromagnetic waves, but it can affect the behavior of the waves.
Therefore the correct option is A.
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The constant of proportionality in a relationship is 0. 5. What equation represents this relationship?.
The equation that represents the relationship with a constant of proportionality of 0.5 is y = 0.5x.
When two variables are related proportionally, it means that their values are related by a constant factor. In other words, if we increase one variable by a certain factor, the other variable will increase by the same factor.
This constant factor is known as the constant of proportionality. It can be represented by the letter k, and is usually determined experimentally by collecting data and analyzing the relationship between the variables.
In this case, we are given that the constant of proportionality is 0.5. This means that for every unit increase in one variable (let's say x), the other variable (let's say y) increases by 0.5 units.
To represent this relationship mathematically, we can use the equation y = kx. Since k is equal to 0.5, the equation becomes y = 0.5x. This equation tells us that if we increase x by one unit, y will increase by 0.5 units.
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How many seconds will light leaving New York City take to reach the following locations Los Angeles (about 4500km) Tokyo(about 11,000km) the moon /400,000 km) mars (0.5 a.u from earth at its closest approach)
A point charge
q = −4.0 ✕ 10−12 C
is placed at the center of a spherical conducting shell of inner radius 3.4 cm and outer radius 3.9 cm. The electric field just above the surface of the conductor is directed radially outward and has magnitude 7.5 N/C.
a) What is the charge density (in C/m2) on the inner surface of the shell?
b) What is the charge density (in C/m2) on the outer surface of the shell?
c) What is the net charge (in C) on the conductor?
a) The charge density on the inner surface of the shell is -4.37 ✕ 10−10 C/m2.
b) The charge density on the outer surface of the shell is 4.37 ✕ 10−10 C/m2.
c) The net charge on the conductor is -2.56 ✕ 10−10 C.
Density is a measure of the mass of an object in relation to its volume. It is expressed as mass per unit volume and is typically expressed in grams per cubic centimeter (g/cm3). Density is an important physical property of matter because it is a measure of an object’s mass and how tightly packed together it is. Density can vary depending on the material, temperature, and pressure.
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Based on the data, what is the relationship between the wave frequency and wave speed?.
C) The speed increases with increasing frequency.
The data shows that as wave frequency increases, wave speed also increases. As the frequency increases, the wave has more energy, so it moves faster.Frequency is a measure of how often something occurs over a period of time. It is usually measured in cycles per second (Hertz) or per minute (cycles per minute). Frequency is used in various fields such as radio, sound, and electromagnetic waves. Wave speed is the speed of a wave as it moves through a medium.Meters per second (m/s) or kilometres per hour (km/h) are the usual units of measurement. This implies that the wave's speed grows together with its frequency.The wave equation is the name given to this relationship.
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complete question:added as picture
HELPP
im not exactly sure what to put
Explanation:
between 0 and 2 hours the relationship between time and distance traveled is a linear one.
that means that the velocity (= distance/time like in km/s) is constant (and not increasing).
and because between the hours 2 and 3 there is no increase in distance, this means the car stood still during that time. so, no, it was not always in motion during the voyage.
therefore,
option 2 is correct (as described, no change in distance means no motion or zero velocity).
and option 3 is correct, because also between hours 3 and 5 the function is linear and the speed ratio is therefore constant.
what is the unit of sound
Answer:
Decibel (dB) is the unit of sound.
Answer:
Decibels ( dB)
Explanation:
When measuring sound intensity in units, it is referred to as decibels
Once ______ is locked, pain causing chemicals cannot transmit their messages.
Once the nerve cell membrane is locked, pain causing chemicals cannot transmit their messages.
What is the membrane ?The membrane is a thin, selective barrier which separates two distinct environments. It is the most fundamental structural and functional element of all living cells, regulating the passage of molecules into and out of the cell. Membranes are composed of a lipid bilayer and proteins. The lipid bilayer is made of phospholipids, which are amphipathic molecules, meaning they have both hydrophilic (water-attracting) and hydrophobic (water-repelling) regions. The membrane proteins embedded in the lipid bilayer provide the cell with selective permeability, allowing for the controlled passage of molecules into and out of the cell, and providing an effective barrier to the external environment. The proteins also provide receptors for signaling molecules, enzymes for metabolic reactions, and a scaffold for organizing the cell’s internal architecture.
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have you ever had to estimate something for which there wasn't an exact answer? what was it? what tools did you use to make your estimation? discuss
Yes, estimation of a population of plant species in a precondition area. The tool use to make estimation was a QUADRAT.
What is estimation ?Finding an estimate or approximation a number that may be used for a purpose despite the possibility of incomplete, ambiguous, or unstable input data is the process of estimation.
It is simple to count plants in a small area, and the distribution of those plants is noted on a map or scale diagram for the region.
A technique known as the quadrat sampling approach may be used to Assess the number of plants.
Thus, a QUADRAT, a square or rectangular frame (tool) composed of thick wire, is repeatedly tossed at random.
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If you clean a vacuum are you the vacuum cleaner?
