A worker at the top of a 459-m-tall television transmitting tower accidentally drops a heavy tool. if air resistance is negligible, how fast (in m/s) is the tool going just before it hits the ground?

Answers

Answer 1

A worker at the top of a 459-m-tall television transmitting tower accidentally drops a heavy tool. If air resistance is negligible, how fast (in m/s) is the tool going just before it hits the ground?

The rule of conservation of energy (the heavy tool’s potential energy at a height of 551 meters above the ground becomes its kinetic energy at ground level) allows us to determine the speed of the object when it hits the ground:

Kinetic Energy Equals Potential Energy

PE=KE

Since mgh=1/2mv2, the mass can cancel out.

In the case where g=9.81m/s2, gh=1/2v2

V=√2gh

=√2*9.81m/s2*459

=3 m/s

It’s possible for an object to have both kinetic and potential energy at once. For instance, a falling object that has not yet hit the ground has both kinetic and potential energy because it is traveling downward and has the capacity to go still further.

The mechanical energy of an object is the total of its potential and kinetic energies.

A falling object loses potential energy while gaining kinetic energy. The difference between the increase in kinetic energy and the decrease in potential energy is exact.

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Related Questions

A 1.00 l sample of water contains 0.0056 g of nh2- ions. determine the concentration of nh2- ions in ppm if the density of the solution is 1.00 g/ml.

Answers

In ppm the concentration of NH2- ions is 5.6 ppm.

We have 1 L sample of water contains 0.0056 g of NH2- ions.

We have to determine the concentration of NH2- ions in ppm.

What is PPM ?

PPM is a term used in chemistry to denote a very, very low concentration of a solution.

According to the question -

Mass of the aqueous solution of NH2- ionsdensity x volume

1 L x 1000 mL x 1 g/mL = 1000g

Now, the ratio of chloride ion mass to the solution mass will give the concentration of NH2- ions →

c = 0.0056/1000

Now, in order to express the concentration in parts per million -

c = (0.0056/0.001 x 10⁶) = 5.6/10⁶

Now -

c = 5.6 g of NH2- ions per 1 million grams of solution which is equal to concentration in ppm.

Hence, in ppm the concentration of NH2- ions is 5.6 ppm.

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Astronomers typically measure the color of stars at multiple wavelengths. the difference in the magnitude of the stars as measured in two parts of the spectrum is known as its:________

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Astronomers typically use filters that exclusively transmit light from a specific narrow band of wavelengths to measure a star's apparent brightness in order to determine the precise color of a star (colors).

Around 0.001 magnitude of starlight may be measured with accuracy by photoelectric photometers. The method of surface photometry, which gauges apparent magnitude in magnitudes per square arcsecond, can also be applied to extended objects like planets, comets, nebulae, and galaxies. The varied hues are caused by the light's estimated blackbody radiation, which is more sensitive to the star's temperature than to the specifics of its composition. As a result, astronomers can gauge a star's surface temperature by observing its hue.

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science fiction often uses nautical analogies to describe space travel. if the starship u.s.s. enterprise is traveling at warp factor , what is its speed in knots and in miles per hour?

Answers

The speed is obtained as 3.3  * 10^9  miles per hour.

What is the distance in  miles per hour?

There are several units of speed. Let us recall that speed is the ratio of the distance covered to the time taken. The speed of light is given as 3 * 10^8 m/s.

Now we have the speed as warp 1.71 which corresponds to five times the speed of light.

Thus the speed is 5(3 * 10^8 m/s) = 1.5 * 10^9 m/s

To convert from m/s to miles per hour';

1 meter/second = 2.2 miles per hour

1.5 * 10^9 meter/second=  1.5 * 10^9 meter/second * 2.2 miles per hour/1 meter/second

= 3.3  * 10^9  miles per hour

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When you push a crate across a level floor at constant velocity, friction between the crate and the floor is?

Answers

Answer:

The friction between the crate and the floor is the same amount as your pushing force when you push a crate across a level floor at constant velocity.

Explanation:

Remember that the force produced by two surfaces coming into contact and sliding against one another is frictional force. This is expressed by the direct relationship between frictional force and normal force.

f=μN

Where

f = frictional force

µ = coefficient of friction

N = Normal force

By dry friction, two solid surfaces in touch are opposed to one another's relative lateral motion. Dry friction is further separated into kinetic friction between moving surfaces and static friction (sometimes known as "stiction") between non-moving surfaces. Additionally, dry friction is typically caused by the interaction of surface characteristics, particularly rough surfaces.

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A balloon is a sphere with a radius of 5.0 m. the force of air against the walls of the balloon is 45 n. what is the air pressure inside the balloon?

Answers

The air pressure inside the balloon is: 0.1432 Pa

The formulas and procedures that we will use to solve this problem are:

a = 4 * π * r²P = F/a

Where:

a = area of the spherer = radiusπ = mathematical constantP = PressureF = Forcea = surface area

Information about the problem:

r = 5.0 mF = 45 N1 Pa = N/m²1 N = kg * m/s²a=?P=?

Using the formula of the sphere area we get:

a = 4 * π * r²

a = 4 * 3.1416 * (5.0 m)²

a = 314.16 m²

Applying the pressure formula we get:

P = F/a

P = 45 N/314.16 m²

P = 0.1432 Pa

What is pressure?

It is a physical quantity that expresses the force applied on the area of a surface.

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If you exert a force f on an object which has a much greater mass than you do, the force which the object exerts on you will?

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If you exert force on an inanimate item, you will also be able to calculate the force that the object will apply to you, which will be opposing and equal to your own.

What would happen if you applied a force that was smaller than the object's mass?

In order to accelerate a heavier (more massive) item in motion, more force must be exerted. When two objects are subjected to the same force, the smaller mass item will change speeds more quickly.

An item can alter its size or shape, begin moving, stop moving, accelerate, or decelerate as a result of a force acting on it. When two things contact, they exert pressures on one another that are identical in size but directed in the opposite direction

The action-reaction law is another name for this rule.

When just one body decides the strength and direction of the force, the force that body exerts is referred to as the "action," and the force that the other body exerts in a similar but opposite direction is referred to as the "reaction."

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when the capacitor fully charges and saturates in voltage, do you expect the voltage across the capacitor to be the same as the battery voltage, less than the battery voltage, or greater than the battery voltage?

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When the capacitor is fully charged, the potential difference across the capacitor is equal to the voltage source.

Capacitor is a device which stores charges. Charges come from the current passing through it.

The charges stored in a capacitor is called capacitance.

Its unit is farad (F)

No current flows in the circuit when a capacitor is fully charged because the potential difference across the capacitor is equal to the voltage source.

Here, the charging current will be zero such that capacitor voltage equal to source voltage.

When the capacitor is fully charged, the potential difference across the capacitor is equal to the voltage source.

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When the electron in h is in the 1st excited state the energy range for range 2 is?

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For electron in 1st excited state of H the energy range for range 2 is 1.9eV-3.4eV

Why are photons emitted?

The excited state of an atom is typically not the most stable state. There is a chance that an electron will drop spontaneously from one excited state to one with a lower (more negative) energy level. An electron releases the extra energy, which is positive, when it moves from one level to another by emitting a photon

What are the three groups for first excited state of hydrogen where the photon interacts with hydrogen?

The various groups are

1)Range 1: 0eV to 1.8eV

2)Range 2: 1.9eV to 2.4eV

3)Range 2:>3.5eV

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use the midpoint rule with n = 4 to estimate the work w (in j) done by the force in moving an object from

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The work w (in j) done by the force in moving an object is 222.4 J

We know that,

[tex]M_{n}[/tex] = ∑[tex]_{i = 1}^{n}[/tex] f ([tex]m_{i}[/tex] ) Δ

where,

i = [tex]i^{th}[/tex] rectangle

n = Number of rectangles

f ([tex]m_{i}[/tex] ) = Function of the curve evaluated at the midpoint of the [tex]i^{th}[/tex]   rectangle

[tex]m_{i}[/tex] = Midpoint of [tex]i^{th}[/tex] interval

Δ = Width of each rectangle

Given that,

x     5    9    13     17   21   25  29   33   37

f(x)  5  5.5  6.8  8.8  9.8  8.1  6.7  5.4  4.2

n = 4

Δ = ( 37 - 5 ) / 4

Δ = 8

∫[tex]_{5} ^{37}[/tex] f (x) dx = ∑[tex]_{i = 1}^{4}[/tex] f ([tex]m_{i}[/tex] ) Δ

∑[tex]_{i = 1}^{4}[/tex] f ([tex]m_{i}[/tex] ) Δ = 8 ( 5.5 +8.8 + 8.1 + 5.4 )

∑[tex]_{i = 1}^{4}[/tex] f ([tex]m_{i}[/tex] ) Δ = 222.4

∫[tex]_{5} ^{37}[/tex] f (x) dx = 222.4 J

The midpoint rule, also known as the midpoint Riemann sum is used to estimate integral of a function or area under a curve.

Therefore, the work w (in j) done by the force in moving an object is 222.4 J

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A sample of gas in a closed container at a temperature of 76°c and a pressure of 5. 0 atm is heated to 399°c. What pressure does the gas exert at the higher temperature? report your answer in atmospheres to one decimal place.

Answers

By using ideal gas approximation, the final pressure is 9.6 atm.

We need to know about ideal gas to solve this problem. The ideal gas will follow the rule

P . V = n . R . T

where P is pressure, V is volume, n is the amount of substance, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

In the isochoric process where the initial and final volume is the same, the temperature and pressure will follow the rule

P1/T1 = P2/T2

where P1 is initial pressure, P2 is final pressure, T1 is initial temperature and T2 is final temperature. (Temperature in Kelvin)

From the question above, we know that:

P1 = 5.0 atm

T1 = 76°C = 349 K

T2 = 399°C = 672 K

By substituting the parameters, we get

P1/T1 = P2/T2

5.0/349 = P2/672

P2 = 9.6 atm

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Identify the type of circuit in which the user retains the physical path through the network, but only for the duration of a call.

Answers

Switched Circuit: This type of connection only maintains a dedicated physical circuit or path between two network nodes for the duration of the connection before data may be transmitted.

What do you mean by circuit?

A circuit in electronics is a complete circular channel via which electricity flows. A current source, conductors, and a load make up a straightforward circuit. The term circuit can be used in a broad sense to refer to any permanent path that energy, data or a signal can go through.

What are the 3 types of circuits?

Circuits can be divided into three categories: series, parallel, and series-parallel. The typical configuration of a single electrical circuit includes one or more resistance or load devices.

What function does a circuit represent?

The closed loop in which electricity can move is referred to as a circuit. Electricity can flow in a closed circuit without interruption from the power source through the conductor or wire to the load before returning to the ground or power source.

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The density beyond which people cease to be nutritionally self-sufficient is called:________

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Physiological nutrition is the density at which people are no longer self-sufficient in terms of nutrients.

How the body absorbs nutrients from food, how we get the energy we require, how we use nutrients, and how all of this relates to health and disease are all topics covered by nutrition physiology.

Why does physiology need nutrition?

Nutritional requirements exist in addition to daily energy requirements in order to keep the body from losing its own proteins, carbs, and lipids. Such molecules must be replenished frequently because they are constantly broken down.An organism uses food to prolong its life through some kind of biochemical and physiological process known as nutrition. It gives living organisms nourishment that can be transformed into energy and chemical building blocks.The ingestion of nourishment, meeting psychological needs, and bodily adjustment are the three purposes of food.

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What is the composition, in atom percent, of an alloy that consists of 92.5 wt g and 7.5 wtu? the atomic weights for silver and copper are 107.87 and 63.55 g/mol, respectively.

Answers

The composition in atom percent of an alloy that consists of 92.5 wt. g and 7.5 wtu is 12 %

Silver's atomic weight = 107.87 gm / mol

Weight in atoms of copper = 63.55  gm / mol

Percentage of silver weight =-92.5 %

Percentage of copper = 7.5 %

Percent composition of silver =

Weight of silver * weight of copper / percent of silver * weight of Copper + percent of copper * weight of silver     *100

= 92.5 * 63.55 / 92.5 *  63.55 + 7.55 *107.87  *100

= 87.9%

Percent composition of copper =

Percent of copper * weight of silver / percent of silver * weight of Copper + percent of copper * weight of silver     *100

=7 .5 * 63.55 / 92.5 *  63.55 + 7.55 *107.87  *100

=12.1 %

The atomic mass of an element is defined as ?

This statement is False.

Atomic mass (sometimes known as atomic weight, however this term is erroneous because the mass is a property of the body while the weight depends on gravity) is the mass of an atom that corresponds to a certain chemical element. Typically, the uma (u) is employed as a unit of measurement. where u.m.a. stands for "unit of atomic mass." In honor of the English chemist John Dalton, this unit is also frequently referred to as the Dalton (Da). The Dalton is equal to one-twelfth of the mass of the carbon-12 nucleus, the most common isotope of carbon. It roughly equates to the mass of a proton (or a hydrogen atom). It is referred to as "uma," while "amu" is also its English abbreviation (Atomic Mass Unit). However, The suggested character is "u".

The weighted average of the masses of each isotope of each chemical element, which takes into account their relative abundance, is typically used to calculate the atomic masses of the chemical elements. This is what accounts for the discrepancy between an element's atomic mass in umas and the number of nucleons that contain the nucleus of its most prevalent isotope.

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A generic protein comprising 387 amino acid residues will have an estimated molecular mass of:____.

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A generic protein comprising 387 amino acid residues will have an estimated molecular mass estimate of 42570 daltons.

What is a protein?

Large biomolecules and macromolecules known as proteins are made up of one or more extended chains of amino acid residues. Proteins play a variety of roles in living things, including accelerating metabolic reactions, reproducing DNA, responding to stimuli, providing cells and organisms structure, and transporting chemicals. A linear chain of amino acid residues is referred to as a polypeptide. Proteins differ from one another primarily in their amino acid sequence, which is determined by the nucleotide sequence of their genes and typically results in protein folding into a specific 3D structure that determines its activity. At least one lengthy polypeptide is present in every protein.

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A flea jumps straight up to a maximum height of 0.410 mm . what is its initial velocity v0v0v_0 as it leaves the ground

Answers

v₀= 2.83478394238 is its initial velocity v₀ as it leaves the ground.

What is velocity?

The rate at which an object's position changes when observed from a specific point of view and when measured against a specific unit of time is known as its velocity.

What about the velocity formula?

The equation v = s/t denotes the vector variable velocity (v), which quantifies movement (or change in location, s), over change in time (t).. Speed (or rate, r) is a scalar number that represents the amount of time (t) spent traveling in relation to the amount of distance (d), as shown by the equation r = d/t.

According to the given statement:

Maximum Height h= 0.410 m

acceleration g= 9.80 m/s² down

let initial speed is Vo.

At maximum height final speed of flea is zero.

From kinematic equation,

v² = v₀² + 2as

0² = v₀² - 2gh

v₀² = 2gh

v₀= [tex]\sqrt{2gh}[/tex]

v₀= [tex]\sqrt{2*9.8*0.41}[/tex]

v₀= 2.83478394238.

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Indicate the correct order of steps as you bring an object into focus under high power.

Answers

Whenever you wish to bring an object into focus under high power, the correct order of steps are as listed below:

"Place slide on stage and secure with stage clips.""Turn on the light and center the specimen over the light source.""Focus specimen on low power using coarse focus adjustment.""Use fine focus to sharpen the image under low power.""Rotate high power lens into position.""Readjust fine focus under high power to produce the sharpest image."

What is a microscope?

A microscope can be defined as an optical device that is typically designed and developed to produce a magnified (an enlarged) image of a minute (very tiny) object, so as to show all the littlest and tiniest details about the object which cannot be seen by the natural human eye.

The types of microscopes.

In Science, there are different types of microscope used for magnifying an object and these include the following:

Polarizing microscope.Transmission electron microscope.Inverted microscope.Scanning electron microscope.Compound light microscope.

In conclusion, you should use the coarse focus adjustment to focus the specimen on low power and then, ensure that fine focus is readjusted under high power in order to produce the sharpest image of this specimen.

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Complete Question:

Indicate the correct order of steps as you bring an object into focus under high power. Rank the options below.

Place slide on stage and secure with stage clips.

Focus specimen on low power using coarse focus adjustment.

Use fine focus to sharpen the image under low power.

Readjust fine focus under high power to produce the sharpest image.

Rotate high power lens into position.

Turn on the light and center the specimen over the light source.

what is nuclear emission?

Answers

Energy given off by matter in the form of tiny fast-moving particles (alpha particles, beta particles, and neutrons) or pulsating electromagnetic rays or waves

Autotransformers are especially practical if the difference between the primary and secondary voltages is _____.

Answers

Autotransformers are especially practical if the difference between the primary and secondary voltages is realtively small.

What is Autotransformer?An autotransformer is a type of electrical transformer that has just one winding. The word "auto" refers to a single coil that runs autonomously, not to a system that runs without human intervention. The primary winding and secondary winding sides of an autotransformer are distinct portions of the same winding. While there is no metallic conducting channel between the primary and secondary windings of a normal transformer, they are separate. The autotransformer winding has at least three taps that are utilized to connect electrical appliances. In terms of size, weight, and cost, autotransformers usually outperform conventional dual-winding transformers, but they also have the disadvantage of lacking electrical isolation between the primary and secondary circuits. Autotransformers also have advantages in terms of reduced leakage reactance, fewer losses, lower excitation current, and higher VA rating for a given size and mass.

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Convert the following temperatures.
a. 75 K to degrees Fahrenheit
b. 96°F to degrees Celsius

Answers

a. -324.67*F

b. 35.5556*C

What sequence of two displacements moves from (5,5) m to (-5,-5) m while traveling a
distance of exactly 20 meters? How does this distance compare to the single displacement that
connects the same starting and ending point?

Answers

A distance of 20 m is greater than a single displacement of 14.14 m that connects the same starting and ending point.

What is the displacement of the sequence?

The displacement of the sequence is calculated as follows;

Δx = √[(x₂ - x₁)² + (y₂ - y₁)²]

Δx = √[(-5 - 5)² + (-5 - 5)²]

Δx = 14.14 m

Thus, we can conclude that a distance of 20 m is greater than a single displacement of 14.14 m that connects the same starting and ending point.

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True or false: in applying the pythagorean theorem to vector addition, the resultant vector is given by the perpendicular vector.

Answers

It is False in applying the pythagorean theorem to vector addition, the resultant vector is given by the perpendicular vector

What is Pythagoras theorem ?

A useful technique for figuring out the outcome of adding two (and only two) vectors that form a right angle to one another is the Pythagorean theorem. The technique cannot be used to combine more than two vectors or to combine vectors that are not at a 90-degree angle.

The Pythagorean Theorem is named for Pythagoras of Samos, a religious figure and mathematician who held the view that everything in the cosmos is made up of numbers. (There are numerous ways to demonstrate this.) The side opposite the right angle is known as the hypotenuse in a right triangle.

The Pythagorean Theorem demonstrates how the side lengths of a right triangle can be calculated from the sum of the areas of three intersecting squares. This theorem is a very helpful tool that serves as the foundation for more intricate trigonometry ideas like the Pythagorean theorem's opposite.

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What are the four major elements in the body

Answers

The correct answer is Oxygen (65%) Carbon (18.5%) Hydrogen (9.5%) Nitrogen (3.2%).

Oxygen (O) - 65% - Oxygen and hydrogen combine to make water, which serves as the body's main solvent and a mechanism for controlling temperature and osmotic pressure. Numerous important chemical molecules include oxygen.

With four bonding sites for other atoms, carbon (C), which accounts up 18.5% of the composition, is the important atom in organic chemistry. Proteins, nucleic acids, carbohydrates, and lipids are all composed of carbon chains. Bonds made of carbon may be ruptured to release energy.

Hydrogen (H) - 9.5% - All organic compounds and water both include hydrogen.

Nitrogen (N) - 3.2% The nucleic acids that make up the genetic code and proteins both include nitrogen.

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Which has the highest heat capacity? (values of heat capacities and calculations are unnecessary).

Answers

Water has the maximum specific heat capacity of any fluid.

The amount of heat that one gram of a material needs either absorb or lose in order to alter its temperature by a degree Celsius is known as specific heat. This equates to one caloric, or 4.184 Joules, for water.

High heat capacity: what is it?Consider the amount of time it takes for a pot to get warm to the touch on the stove as opposed to how long it takes for the water within to warm up. A substance with a high heat capacity may absorb a lot of heat before registering a change in temperature.Why does water have the greatest ability to retain heat?

Although the hydrogen bonds in water are much too weak to be compared to intra - molecular bonds like covalently or ionic bonds, they are nevertheless strong enough to require a lot of energy to break. Water boils at 100°C for this reason.

Many people believe hydrogen bonding is the cause of water's high specific heat.

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1) If students spend more time using TikTok, then they will read fewer books. Independent Variable:
Dependent Variable:​

Answers

Answer: number of books

Explanation:

A donkey starts from rest and accelerates for 6.7 s at a rate of 1.6 m/s².
What is the maximum speed the donkey achieves? Round your answer
to 2 decimal places.

Answers

The maximum speed of the donkey is 10.72m/s

The question is based on the principle of motion in one dimension and hence formulas of motion in one dimension can be applied.

It is given that donkey attains an acceleration of 1.6 m/s^2

The time taken to accelerate  to given speed is 6.7 seconds

We use the formula v=u + at to find the fastest speed

v is the final or maximum speed

u is the initial speed which in this case is 0 as the donkey is at rest

a is the acceleration of the donkey

t is  the time taken in seconds

v = u + at

v= 0 + 1.6 x 6.7

 = 10.72 m/s

Hence the donkey obtains the speed of 10.72 m/s

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Blood contains different parts mainly plasma and red blood cells when people give blood there are machines that separate

Answers

The correct answer is centrifuge.

Your complete blood is drawn out during an apheresis procedure, which is used to donate platelets. Your blood is spun in a centrifuge to separate your plasma, platelets, and red blood cells. As the blood is divided, the heavier reds cells drop to the bottom and are given back to you.

Between the liquid plasma and the platelets that are tracked into a small pouch that is wrapped around the centrifuge cylinder as the liquid plasma rises. When you donate blood, your spleen releases stockpiled platelets into your bloodstream in an effort to stop the bleeding.

As a result, more platelets and plasma are collected, enabling you to donate one, two, or even three doses of platelets in a single visit. Your healthy bone marrow quickly starts producing additional platelets from stem cells to replace those that have been given while this is happening.

Since only one donor is used for the donation, platelet donors are able to provide patients with a greater amount and higher-quality platelets to aid in their fight for survival.

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the energy flux associated with solar radiation incident on the outer surface of the earth's atmosphere has been accurately measured and is known to be 1368 w/m2 . the diameters of the sun and earth are 1.39 × 109 and 1.27 × 107 m, respectively, and the distance between the sun and the earth is 1.5 × 1011 m.

Answers

The emission power of sun is 3.868 * [tex]10^{26}[/tex] W

We know that,

Energy flux on earth = Emission power of sun / 4 π [tex]r^{2}[/tex]

where,

r = Distance between sun and earth

Given that,

Energy flux on earth = 1368 W / [tex]m^{2}[/tex]

Diameter of sun = 1.39 * [tex]10^{9}[/tex] m

Diameter of earth = 1.27 * [tex]10^{7}[/tex] m

r = 1.5 * [tex]10^{11}[/tex] m

Emission power of sun = 1368 * 4 * 3.14 * ( 1.5 * [tex]10^{11}[/tex] [tex])^{2}[/tex]

                                      = 1368 * 2.828 * [tex]10^{23}[/tex]

Emission power of sun = 3.868 * [tex]10^{26}[/tex] W

Energy flux is the rate of transfer of energy through a surface. The unit of total rate of energy transfer is W = J / s. The unit of specific rate of energy transfer is W / [tex]m^{2}[/tex] = J / [tex]m^{2}[/tex] s

Therefore, The emission power of sun is 3.868 * [tex]10^{26}[/tex] W

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To find the population after seven days, substitute t = 7 into the equation and simplify. (round your answer to the nearest whole number.) p(7) = 5e7k

Answers

The population after seven days will be p(7) = 5 [tex]$e^{7k} }[/tex].

We have the following function -

p(t) = 5 [tex]$e^{tk} }[/tex]

We have to determine the total population after 7 days.

What is the general meaning of Growth rate?

In general, growth rate is the measurement of how fast something increases in size during a particular period.

According to the question, we have -

p(t) = 5 [tex]$e^{tk} }[/tex]

Now -

for t = 7 -

p(7) = 5 [tex]$e^{7k} }[/tex]

where k is growth rate.

Hence, the population after seven days will be p(7) = 5 [tex]$e^{7k} }[/tex].

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Materials whose constituent particles are bound by which type of bond are generally expected to have the lowest melting temperatures?

Answers

Materials whose constituent particles are bound by Vander waal's type of bond are generally expected to have the lowest melting temperatures

What is Vander waal's interaction ?

When two atoms are close enough to each other that their outer electron clouds just barely contact, van der Waals interactions take place. This causes charge oscillations that produce a unidirectional, nonspecific attraction.

Hydrogen bonding, dispersion forces, and dipole-dipole interactions are examples of van der Waals forces.

Van der Waals forces come in three different flavours: dispersion (weak), dipole-dipole (medium), and hydrogen (strong). Polar molecules and ions join together to produce ion-dipole bonds, which connect ionic species to covalent molecules. Usually, these chemicals form medium- to strong-bonding structures.

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Humans convert approximately ________ of the energy stored in food to useful work

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Humans convert approximately 40% of the energy stored in food to useful work

Humans can store about 40% of the energy from the food consumed due to the conversion of energy from food through the metabolic process (metabolism).

The other 60% of the energy it is used to maintain the normal function of the body and the other activities that involve physical and mental activities

The energy storage is a reserve of energy that we can use in really difficult situation when the body is with no energy.

What is metabolism?

The processes of a chemical or physical nature by which the human body converts or uses energy.

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