What effect generates lift on a Flettner rotor?

Answers

Answer 1

Magnus effect generates lift on a Flettner rotor. It is named as Magnus effect, as it was first experimentally investigated by H G Magnus.

A Flettner rotor is a smooth cylinder with a disc plate at the end of it. The disc at the end is called as Thom disc. It optimses aerodynamic efficiency at the end of rotor. The rotor is rotated along its axis by the ship's engines. It is used in ships and airplanes. In ships it is mounted upright whereas in airplanes it is mounted sideways in place of wings.

As air strikes the rotating rotor at right angles to the axis of rotor, the ship moves in the direction perpendicular to both the rotation axis and air flow direction due to aerodynamic force created by Magnus effect.

Therefore, Magnus effect generates lift on a Flettner rotor.

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Related Questions

The snell's law is also known as ________?


First law of reflection


Second law of accoutic


Second law of reflection


Second law of refraction

Answers

The Snell's law is also known as second law of refraction.

According to the Snell's law , the ratio of the sine of angle of incidence to the sine angle of refraction is equal to a constant of a light ray for two media . And it is given as,

[tex]\frac{sini}{sinr} = constant[/tex]

Where, [tex]sin i[/tex] is the angle of incidence light ray, [tex]sinr[/tex] is the angle of refracted light ray. Refractive index, also known as this constant and referred to as the second medium with respect to the first medium i.e. (₁μ₂) ,therefore the equation can be written as,

μ₁/μ₂ = ₁μ₂= [tex]\frac{sini}{sinr} = constant[/tex]

Refraction is a phenomena in which a light ray bends as it travels through one medium through another .

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an upward force of 170 N IS APPLIED TO A BOX WEIGHING 50 N DRAW A FREEBODY FORCE DIAGRAM FOR THIS SITUATION

Answers

A free body diagram of the box consists of weight of the box (50N) acting downwards, normal reaction acting upwards and applied force acting in x-direction.

What is free body diagram?

A free-body diagram is a sketch of an object of interest with all the surrounding objects stripped away and all of the forces acting on the body shown.

The forces on the box;

applied force, acting forward, F = 170 Nweight of the box, acting downwards, W = 50 Nnormal reaction of the box acting upwards,  R = W = 50 N

The free body diagram of the forces acting on the box is illustrated as follows;

                                ↑ R

                      F    → Ф

                                ↓ W

Thus, a free body diagram of the box consists of weight of the box (50N) acting downwards, normal reaction acting upwards and applied force acting in x-direction.

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NEED HELP ASAP PLS
If a basketball player jumps and lands on the ground after 3.2 seconds with a final velocity of −5.5 m/s, what is the player’s initial velocity? Assume (a=−9.8 m/s2) (NOTE: Only 1 point if no work is shown)

Answers

The player’s initial velocity, given the data from the question is 15.68 m/s

How to determine the time to reach the maximum height

We'll begin by obtaining the time taken for the player to reach the maximum height. This can be obtannnned as follow:

Time for the entire trip (T) = 3.2 sTime to reach maximum height (t) = ?

T = 2t

3.2 = 2t

Divide both sides by 2

t = 3.2 / 2

t = 1.6 s

How to determine the initial velocity of the playerTime to reach maximum height (t) = 1.6 sAcceleration due to gravity (g) = -9.8 m/s²Final velocity (v) = 0 (at maximum height)Initial velocity (u) = ?

v = u + gt

0 = u + (-9.8 × 1.6)

0 = u - 15.68

Collect like terms

u = 0 + 15.68

u = 15.68 m/s

Thus, the initial velocity of the player is 15.68 m/s

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An atom of a _____________________ has two electrons in its outer level and will lose these when it combines with another atom.
a. alkali metal
b. noble gas
c. alkaline earth metal
d. halogen

Answers

Answer:

A alkali metals hope this helps

Answer: c. alkaline earth metal

Explanation: group II elements in the periodic table are generally found as 2+ ions.  This is because they have lost two electrons to ionic bonding.

How is simple machine are more applicable than complex machine.​

Answers

Answer:

Explanation:

A simple machine is the simplest device that performs work. A simple machine applies a single force to a single load and generally acts as a building block in developing more complex, compound machines. Simple machines usually fall into one of six categories, including: lever, wheel and axle, pulley, inclined plane, wedge and the screw.

I hope this helps you ")

How much work is done to lift a 5.36kg box off the ground 2.2m?

Answers

Answer:

Explanation:

Given:

m = 5.36 kg

h = 2.2 m

___________

A -?

Work:

A =m·g·h

A = 5.36·9.8·2.2 ≈ 116 J

Mary needs to row her boat across a 140 m-wide
river that is flowing to the east at a speed of
1.5 m/s. Mary can row with a speed of 4.0 m/s.

Answers

Answer:

2.5

Explanation:

you just subtract basic math

2.5 is going to be your answer.

What is the volume of a rock with a density of 45 g/mL and a mass of 855 g?

Answers

The volume of a rock with a density of 45 g/mL and a mass of 855g is 19mL.

How to calculate volume?

The volume of a gas can be calculated by dividing the mass of the substance by its density as follows:

Volume = mass ÷ density

According to this question, a rock has a density of 45 g/mL and a mass of 855g. The volume can be calculated as follows:

Volume = 855g ÷ 45g/mL

Volume = 19mL

Therefore, the volume of a rock with a density of 45 g/mL and a mass of 855g is 19mL.

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During a collision with a wall, the velocity of a ball mass 0.170kg changes from v1 = 23.1m/s toward the wall to v2 = 17.1m/s away from the wall. If the time the ball was in contact with the wall was t =0.0651s ,what was the magnitude of the average force applied to the ball?

Answers

The magnitude of the average force applied to the ball is 104.98 N

What is momentum?

Momentum is defined as the product of mass and velocity. It is expressed as

Momentum = mass × velocity

What is impulse?

This is defined as the change in momentum of an object.

Impulse = change in momentum

Impulse = final moment – Initial momentum

But

Impulse = force × time

Therefore

Force × time = final moment – Initial momentum

Ft = m(v - u)

How to determine the forceMass (m) = 0.170 KgInitial velocity = 23.1 m/sFinal velocity = 17.1 m/sTime = 0.0651 sForce = ?

Ft = m(v + u) (rebound )

Divide both sides by t

F = m(v + u) / t

F = [0.17 × (17.1 + 23.1)] / 0.0651

F = [0.17 × 40.2] / 0.0651

F = 6.834 / 0.0651

F = 104.98 N

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Draw an arrow to represent the friction force.

Answers

Answer:

See below

Explanation:

The force of friction is opposite to the force trying to move the block to the right....

If each wafer can hold 400 chips, what is the maximum number of chips that can be produced from one entire cylinder?

Answers

The maximum number of chips is 33,333

What is a chip?

A chip is a tiny but complex modules that store computer memory or provide logic circuitry for microprocessors.

We need to find the number of wafers that can be cut from a single crystal.

The crystal is 25cm and each wafer is 0.3mm. We perform division to get the number of wafers per crystal after getting everything into the same units. 25cm=250mm.

250mm/0.3mm=833.3333 wafers.

Each wafer yields 400 chips so we multiply 400 chips per wafer by 833.33 wafers to get 33,333 chips.

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Please help!Giving Brainliest
I need to turn this in by midnight

Answers

u = initial speed = 10 m/s

v = final speed = 14 m/s

Impulse is 2000 N/s

Given,

Mass of car = 500 kg

Force = 200 N

Acceleration = F/M

Acceleration = 0.4 m/s^2

Calculating the final speed,

u = initial speed = 10

v = final speed = ?

t = time of acceleration

v = u + at

v = 10 + (0.4 x 10)

v = 14m/s

Impulse = Ft = mv - uv

(200 x 10) = (500 x 14) - (500 x 10)

2000 = 7000 - 5000

2000 = 2000

Hence our answer is correct and the impulse is 2000 N/s.

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Two objects are held close together. When they are released, they move toward one another. Which conclusion is
supported by this evidence?

Answers

Answer:

They are attracted to each other. Maybe a magnet. Like 99% sure.

Explanation:

Objects that are usually attracted to each other are magnets. When you release two magnets close to each other, with each pole opposite to the other, they move toward each other and stick. You can only take them apart by force.

The objects have opposite charges.

As the coaster starts rolling down the hill, it has a height of 10 m and a velocity of 42 m/s. What is the total energy of the coaster at this point? (It has a mass of 1300 kg.)

Answers

The total energy of the coaster at that point is 1274000 J.

What is energy?

Energy can be defined as the ability or the capacity for a body to perform work.

From the question, to calculate the total energy of the coaster at that point, we use the formula below.

Formula:

E = mgh+mv²/2........... Equation 1

Where:

E = Total energy of the coaster at that point.m = Mass of the coasterh = Height of the coaster at that pointv = Velocity of the coaster at that pointg = acceleration due to gravity.

From the question,

Given:

m = 1300 kgh = 10 mv = 42 m/sg = 9.8 m/s²

Substitute the values above into equation 1

E = (1300×10×9.8)+(1300×42²/2)E = 127400+1146600E = 1274000 J

Hence, the total energy of the coaster at that point is 1274000 J.

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For identical metallic objects carry the following charges

Answers

The final charge on each object is -1.6μC.

Each metallic object has 10^13 electrons on it.

Charged material experiences a force when it is exposed to an electromagnetic field due to the physical property of electric charge. You can have a positive or negative electric charge. Unlike charges, they attract one another, while like charges repel one another.The charges are q1 = 1.6μC, q2 = 6.2μC, q3 =-4.8μC, and q4 =-9.4μC.When they are in contact with each other, then the net charge on the four metallic objects is q1 + q2 + q3 + q4 =-6.4μC The final charge on each object is (-6.4μC)/4 = -1.6μC The charge is negative. So it contains electrons. An electron has a charge of -1.6 * 10^(-19)C.The number of electrons on each object is calculated as (1.6*10^(-6)/(1.6*10^(-19)).The number of electrons on each object is 10^13.

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True or false-Consider an object that starts from rest and moves with constant acceleration. The plot of displacement versus time for such motion is a curved line while the plot of displacement versus time squared is a straight line.

Question 21 options:
True
False

Answers

Maybe the answer is false

Evaporation takes place at the surface of a liquid , use particle model of matter to explain evaporation?

Answers

Explanation:

These "more energetic particles" may have

sufficient energy to escape from the surface

of the liquid as gas or vapour.... Evaporation

takes place at room temperature which is

often well below the boiling point of the

liquid. Evaporation happens from the surface

of the liquid.

What is the volume of a rock with a density of 45 g/mL and a mass of 855 grams?

Your answer must have units

Answers

The volume of the rock with a density of 45 g/mL and a mass of 855 grams is 19 ml

We know that,

ρ = m / V

where,

ρ = Density

m = Mass

V = Volume

Given that,

ρ = 45 g / ml

m = 855 g

V = 855 / 45

V = 19 ml

Density is the measure of amount of molecules present in substance. It is denoted by ρ. Its unit is usually g / ml.

Therefore, the volume of the rock with a density of 45 g/mL and a mass of 855 grams is 19 ml

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a boat whose speed in still water is 1.80 m/s must cross a 285 wide river

Answers

The speed of the river current with respect to the boat is(Vₙ)=  1.036 m/s.

What is speed?

Speed is a scalar quantity. Speed is a way of measuring how quickly something is moving or being done, or something moving fast.

How can we calculate the values of the speed of the river?

To calculate the values of the speed of the river, we are using the formula,

v=1.768-Vₙ

The given parameters;

boat's speed ,  vₐ= 2.5 m/s

the river's width, w = 285 m

upstream distance , d = 118 m

the pilot's direction, θ = 45⁰

We know the velocity has the vertical and horizontal component, so we can calculate this ;

v(x)=vₐsinθ=2.5*sin45°=1.768m/s

v(y)=vₐcosθ=2.5*cos45°=1.768m/s

To calculate the time taken for the boat is  ;

t=w/v(y)

Or, t=285/1.768

Or, t = 161.25 s

To calculate the total horizontal velocity of the boat and the river; we are using the formula,

v=1.768-Vₙ

Or,1.768-Vₙ=d/t

Or, 1.768-Vₙ=118/161.2

Or, 1.768-Vₙ=0.732

Or, Vₙ=1.036m/s

From the above calculation we can conclude that,

The speed of the river current with respect to the boat is 1.036 m/s.

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Note: The question is incomplete in the portal. Here is the total question,

Question: A boat, whose speed in still water is 2.50 m/s, must cross a 285-m wide river and arrive at a point 118m upstream from where it starts. To do so, the pilot must head the boat at a 45.0 degrees upstream angle. What is the speed of the rivers current?

If the fuse in one of the houses can withstand a maximum current of 5 A at potential difference of 110 V, The maximum number of lamps that can be lighted at the same time without blow up of the fuse......
lamps

Answers

The maximum number of lamps that can be lighted at the same time without blow up of the fuse is 11.

The rate of performing labor is referred to as power. The amount of work (W) to the amount of time (T) is the ratio (t). Power(P)=Time(t) Work(W) In honor of physicist James Watt, the SI system of units uses the symbol W for power. Electric charge passes past a point in a circuit at a constant pace known as current. The rate at which an electric charge flows is defined as current. The potential difference in charge between two sites in an electrical field is known as voltage, also known as electromotive force.

Power= V*I

          =110 *5

          =550 watt

no. of lamps= 550/5

                   =11 lamps.

The maximum number of lamps that can be lighted at the same time without blow up of the fuse is 11.

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A rock is thrown vertically upwards at a velocity of 11 meters per second from an initial height of 1.5 meters.

Considering “up” to be the positive y direction, answer the following questions:


How high above the ground does the rock go?

How long does it take to get to the top of its travel?

What is the velocity of the rock half of a second after it is released?

What is the velocity of the rock 1.5 seconds after release?

Answers

The height above the ground reached by the rock is 7.7 m.

The time taken for the rock to travel half of a second after it is released is 1.12 seconds.

The velocity of the rock half of a second after it is released is 15.9 m/s.

The velocity of the rock 1.5 seconds after release is 25.7 m/s.

Height travelled by the rock

The vertical height traveled by the rock is calculated as follows;

h = u²/2g

h = (11²)/(2 x 9.8)

h = 6.2 m

Height above the ground reached by the rock = 1.5 m + 6.2 m = 7.7 m

Time of motion of the rock

t = √2h/g

t = √(2 x 6.2/9.8)

t = 1.12 seconds

Velocity of the rock half a second after it was released

v = u + gt

v = 11 m/s   +  (9.5 x 0.5)

v = 15.9 m/s

Velocity of the rock 1.5 seconds later

v = u + gt

v = 11 m/s   +  (9.5 x 1.5)

v = 25.7 m/s

Thus, the height above the ground reached by the rock is 7.7 m.

The time taken for the rock to travel half of a second after it is released is 1.12 seconds.

The velocity of the rock half of a second after it is released is 15.9 m/s.

The velocity of the rock 1.5 seconds after release is 25.7 m/s.

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A series of ocean waves, 5.0 m between crests, move past at 2.0 waves/s. Find their speed.​

Answers

Answer:

10 m/s

Explanation:

Speed = wavelength * frequency

       =   5 m   *  2 / s   = 10 m/s

3 important science skills

Answers

Answer: Inferring,Predicting,Analyzing

if this wasn't what you were looking for, here are some more science skills to help you pass you classes

- Evaluating.

- Generating possibilities.

- Formulating hypothesis.

- Communicating

Explanation: all these science skills will help you get through your science class with no struggles

Explain why it’s much colder at the bottom of the pool than at the top. also describe what heat transfer processes is taking place

Answers

Heat transfer by radiation and convection causes the surface water of the pool to be warm which decreases with depth.

Why is it colder at the bottom of the pool than the top of the pool?

There are two heat transfer process responsible for variation in temperature of water at different depth of a pool, they include;

Heat transfer by radiationHeat transfer by convection

Heat transfer by radiation

The surface of the water absorbs heat from the air and the sun. The heat from the sun is transferred to the pool through radiation.

Heat transfer by convection

The heat from the air is transferred to the pool through convection.

Thus, these two heat transfer processes  causes the surface water of the pool to be warm which decreases with depth.

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A car driver traveling 40 m/s slows down to a speed of 20 m/s in 10 seconds. What is the car’s acceleration?

Answers

the answer to this question is

-2 per second

The equation we use is to determine the acceleration of the car, it is a Uniformly Varied Rectilinear Motion (MRUV) is:

             [tex]\boxed{\sf{a=\dfrac{V_{f}-V_{o}}{t}}} \ \ \ \ \ \sf{\longmapsto \ \ \ \ \ Where \ \ \ \ \begin{cases}\sf{V_{f} = Final \ velocity} \\ \sf{V_{o}=Initial \ velocity} \\ \sf{a=Acceleration} \\ \sf{t=Time} \end{cases}}[/tex]

We extract the data of the problem:

[tex]\sf{V_{f}=20 \ m/s}[/tex][tex]\sf{V_{o}=40 \ m/s}[/tex][tex]\sf{t=10 \ s}[/tex]

We plug these values into the scalar equation above.

                                         [tex]\sf{a=\dfrac{V_{f}-V_{o}}{t}}[/tex]

                                   [tex]\sf{a=\dfrac{20 \ m/s-40m/s}{10 \ s} }[/tex]

                                          [tex]\sf{a=\dfrac{-20 \ m/s}{10 \ s} }[/tex]

                                         [tex]\boxed{\boxed{\boldsymbol{\sf{a=-2 \ m/s^{2} }}}}[/tex]

Rpta: The acceleration of the car was -2 m/s^2.

A runner of mass 58.7 kg starts from rest and accelerates with a constant acceleration of 1.07 m/s2 until she reaches a velocity of 7.5 m/s. She then continues running with this constant velocity.

a) How far has she run after 53.3 seconds?
b) What is the velocity of the runner at this point?

Answers

A. The distance travelled after 53.3 seconds is 1919.63 m

B. The velocity of the runner ath the given time is 64.53 m/s

A. How to determine the distance travelled after 53.3 seconds

The distance travelled can be obtained as follow:

Initial velocity (u) = 7.5 m/sAcceleration (a) = 1.07 m/s² Time (t) = 53.3 secondsDistance (s) =?

s = ut + ½at²

s = (7.5 × 53.3) + (½ × 1.07 × 53.3²)

s = 399.75 + (0.535 × 2840.98)

s = 399.75 + 1519.87615

s = 1919.63 m

Thus, the distance travelled in 53.3 seconds is 1919.63 m

B. How to determine the velocityInitial velocity (u) = 7.5 m/sAcceleration (a) = 1.07 m/s² Time (t) = 53.3 secondsFinal velocity (v) =?

v = u + at

v = 7.5 + (1.07 × 53.3)

v = 7.5 + 57.031

v = 64.53 m/s

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Which wavelengths will a person be able to see?
760 nm
800 nm
510 nm
300 nm

Answers

Answer:

380 to 700 nanometers.

Explanation:

How much work is done when pushing a desk with a force of 28N across the distance of 1.7 meters?​

Answers

The work done when pushing a desk is (W)= 47.6 Joules

What is work?

When an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement that explains that the work done on a object.

How can we calculate the values of the work?

To calculate the values of the work done we are using the formula,

W = F×d

Here, we are given,

F = Exerted Force =28N

d = Covered Distance  in the desk =1.7m

We have to calculate,

W = Work done, unit in Nm or joules

Now we put the known values in the above equation, we get,

W = F×d

Or, W = (28N)×(1.7m)

Or, W = 47.6 Nm

Or, W = 47.6 Joules

Now we can say that,

The work done when pushing a desk is (W)= 47.6 Joules

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Find the direction of this vector.
80.0°
B-18.6 m
0 = [?]°
Hint: Remember, 0 is the direction of the
vector and is measured from the +x-axis.

Answers

The direction of the given vector B of 18.6 m that is 80° left of the positive y-axis is 170°

Angle of the vector made with positive y-axis = 80°

Angle between positive x and y axis = 90°

Direction of B, θ = 90° + 80°

θ = 170°

Direction of a vector is the angle of the vector that is made with positive x-axis. A vector with a certain direction of certain degrees means that the vector is rotated that much degrees in counter-clockwise direction relative to positive x-axis.

Therefore, the direction of the vector B is 170°

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A tennis ball is dropped from 1.67 m above the ground. It rebounds to a height of 0.898 m. With what velocity does it hit the ground? The acceleration of gravity is 9.8 m/s2 . (Let down be negative.) Answer in units of m/s.

Answers

Velocity of the ball by which it hits the ground is 5.721 m/s.

Height from which the ball has been thrown, s = 1.67m

Acceleration due to gravity, g = 9.81 m/s²

Since, velocity of the ball hitting the ground is being asked, rebound height can be ignored.

So according to the Third Equation of Motion which relates velocity, displacement and acceleration, we can find the velocity of the ball,

[tex]v^{2} = u^{2} + 2as[/tex]

u = initial velocity of the ball = 0 m/s

v² = 0 +2*(-9.8)*(-1.67)

v² =  32.732 m/s

[tex]v = \sqrt{32.732}[/tex] m/s

v = -5.721 m/s

Square root of velocity (v) will give two values, one as positive and the other as negative, and here negative value is considered because the velocity is towards the ground and downwards is taken here as negative.

Therefore the velocity of the ball hitting the ground will be 5.721 m/s.

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ART HELP URGENT! Please look at the photos for the questions When 53 J of heat is added to 15 g of a liquid, its temperature rises from 10.7 C to13.0C.What is the heat capacity of the liquid? (Which is the independent or dependent variable) You are walking directly away from your house. You are 555 kilometers away from your house when you start walking, so you can determine your distance from your house by adding 555 to the number have walked. Where is the majority of a city budget spent? A. Record KeepingB. Emergency Services C. Employee SalariesD. Public Safety A uniformly charged, straight filament 7.00m in length has a total positive charge of 2.00C. An uncharged card-board cylinder 2.00cm in length and 10.0cm in radius surrounds the filament at its center, with the filament as the axis of the cylinder. Using reasonable approximations, find (b) the total electric flux through the cylinder. which statement best describes the difference between the sympathetic and parasympathetic nervous systems? Explain how miles initiated into culver creek boarding school. Do you feel that he right to be angry? Explain your answer 4) Mr. Carter loves underwater diving. His houseboat is 250 feet above sea level. After jumping fromthat level, he ended up at 650 feet below sea level.What was the total distance that Mr. Carter traveledfrom his boat to where he ended up? resolver esto2x - 3y = 74x + y = 7Ayuda es para hoy ;-; si t sale el resultado deben de cambiarlo y ver si salio ;-; [tex] \rm\sum_{n=1}^{\infty}\sum_{m=1}^{\infty} \frac{( - 1 {)}^{n + 1} }{ {mn}^{2} + mn + {m}^{2} n} \\ [/tex] A restaurant serves breakfast, lunch, anddinner. The restaurant offers a daily special.To estimate the percentage of customers who order the daily specials, the restaurant selected a random sample of customers who had lunch during 2 month period. From the results, the restaurant determined that 25% of these customers ordered the dailyspecial. Which statement about the sample it true?1) no generalizations can be made because the sample size is too small.2)the same shows that exactly 25% of the customers ordered the daily specials3) the sample might not be representative of the population behave it only survey lunch customers.4) the sample percentage is the percentage of customers who order daily specials I really need help its due in 10 minutes When country music deals with social issues, its focus is often omO A. documenting life in small towns.OB. protecting the rights of workers.OC. preserving things, rather than changing things.OD. changing things, rather than preserving things. Select the correct location on the map.OAgriculture develoued independently in different areas of the world. Because different kinds of plants grow indifferent regions, early farmersended up growing different crops. Which region grew wheat and barley? Where in map 1. Blood is an example of which level of organization WHAT ARE TWO BENEFITS AND DRAWBACKS OF BEING A SOLE TRADER? Why does Lord Shamash urge Gilgamesh toattack Humbaba?O Humbaba has only one aura, making him easier todefeat.O Humbaba is weak and wounded from another battle.O Humbaba has finally come out of a deep sleep.O Humbaba has misplaced his protective shield. 3. (a) What skills does Hiawatha give his people? (b) Make InferencesWhat culturally specific theme is suggested by these skills?(c) Interpret What is a universal theme that is suggested by the skills? Which text best completes the sentence? a client is newly diagnosed with hodgkin lymphoma. the nurse understands that the client's treatment will be based on what concept?