English : asked on pedro48
 23.12.2021

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Physics
Step-by-step answer
P Answered by PhD

1) Only the perpendicular component of wind is responsible for the rotation, because gravity points downward.

2) static friction is greater than kinetic friction and the applied force acts oppositely

3)   Inertia decreases with decreasing radius of the orbit.

4) constant is the mass of the car

Explanation:

1) In order to know which statement is correct, let's analyze the movement of the mill.

The rotation of the blades due to a force perpendicular to each one, which creates a torque that results in its rotation.

The true force does not affect the movement because it is applied at the center of mass of the mill that coincides with its axis of rotation.

Of the statements, the correct one is:

The perpendicular to the wind is responsible for the movement

2) static friction is the result of microscopic bonds between two surfaces when there is no relative motion between them

kinetic friction is the result of the unions between the two surfaces when there is a relative movement between them.

From these statements it follows that friction is contrary to motion, static friction must be greater than kinetic friction.

Of the statements the correct one is:

static friction is greater than kinetic friction and the applied force acts oppositely

3) The inertia of a particle is

         I = m R²

where m is the mass of the satellite and R is the distance from the center of the Earth, decreasing with each orbit

           

The correct answer is:

  Inertia decreases with decreasing radius of the orbit.

4) From the figure it can be seen that the motorist subjected to a constant force, for which we can apply Newton's second law

          F = m a

The force equals the applied weight.

The quantity that is held constant is the mass of the car

since the applied force and therefore the acceleration can be changed by changing the applied weight.

Physics
Step-by-step answer
P Answered by PhD

1) Only the perpendicular component of wind is responsible for the rotation, because gravity points downward.

2) static friction is greater than kinetic friction and the applied force acts oppositely

3)   Inertia decreases with decreasing radius of the orbit.

4) constant is the mass of the car

Explanation:

1) In order to know which statement is correct, let's analyze the movement of the mill.

The rotation of the blades due to a force perpendicular to each one, which creates a torque that results in its rotation.

The true force does not affect the movement because it is applied at the center of mass of the mill that coincides with its axis of rotation.

Of the statements, the correct one is:

The perpendicular to the wind is responsible for the movement

2) static friction is the result of microscopic bonds between two surfaces when there is no relative motion between them

kinetic friction is the result of the unions between the two surfaces when there is a relative movement between them.

From these statements it follows that friction is contrary to motion, static friction must be greater than kinetic friction.

Of the statements the correct one is:

static friction is greater than kinetic friction and the applied force acts oppositely

3) The inertia of a particle is

         I = m R²

where m is the mass of the satellite and R is the distance from the center of the Earth, decreasing with each orbit

           

The correct answer is:

  Inertia decreases with decreasing radius of the orbit.

4) From the figure it can be seen that the motorist subjected to a constant force, for which we can apply Newton's second law

          F = m a

The force equals the applied weight.

The quantity that is held constant is the mass of the car

since the applied force and therefore the acceleration can be changed by changing the applied weight.

Mathematics
Step-by-step answer
P Answered by Specialist

-3n^9

Step-by-step explanation:

cube root of -27 is -3 and divide 27 with 3 you'll get 9 so the answer is -3n^9

Mathematics
Step-by-step answer
P Answered by PhD
3x - 6 + x - 10 = 180

Combine like terms

4x -16 = 180

Add 16

4x = 196

Divide by 4

X = 49
French
Step-by-step answer
P Answered by PhD
Hello
1. Nous préférons venir voir Julien ce week-end
2.Jean-Louis et Christine espère que leurs enfants leur écriront souvent ( im not sure ¿ )
3.il est possible qu’il neige demain
4.je ne veux pas sortir ce soir
5.Andrea , il peut se marié bientôt avec François
6.il est certain que vous êtes invitez au mariage
Mathematics
Step-by-step answer
P Answered by PhD

x=30

Step-by-step explanation:

Vertical angles formed by intersecting lines are always equal so the an equation can be formed:

4x+30=5x to solve start by subtracting 4x on both sides

30=x

Mathematics
Step-by-step answer
P Answered by PhD

x=27\ units

Step-by-step explanation:

we know that

Triangles BDR and QDC are similar, because QC and BR are parallel lines

If two figures are similar, then the ratio of its corresponding sides is equal and is called the scale factor

In this problem

\frac{QD}{BD} =\frac{DC}{RD}

substitute the values

\frac{39}{39+26} =\frac{x}{x+18}

\frac{39}{65} =\frac{x}{x+18}

65x=39(x+18)

65x-39x=702

26x=702

x=702/26

x=27\ units

Physics
Step-by-step answer
P Answered by Master

\:  \:  \:  \:  \:  \:  \:  \:  \:

1.Electromagnetic waves have a vast range of practical everyday applications that includes such diverse uses as communication by cell phone and radio broadcasting, WiFi, cooking, vision, medical imaging, and treating cancer.

2.The resistance of a 50 W bulb is greater than the resistance than a 100 W bulb. The filament in the 50 W bulb is thicker and it will be brighter than the 100 W bulb. Increasing the power increases the resistances.

Mathematics
Step-by-step answer
P Answered by PhD

Domain [-5,∞)

Range [0,∞)

Step-by-step explanation:

Part 1) Find the domain

we have

f(x)=\frac{1}{2}\sqrt{x+5}

we know that

The radicand must be greater than or equal to zero

so

x+5\geq 0

solve for x

subtract 5 both sides

x\geq -5

The solution for x is the interval [-5,∞)

All real numbers greater than or equal to -5

Remember that

The domain of a function is the set of all possible values of x

therefore

The domain of the function f(x) is the interval  [-5,∞)

Part 2) Find the range

we have

f(x)=\frac{1}{2}\sqrt{x+5}

Find the value of f(x) for the minimum value of x

For x=-5

f(x)=\frac{1}{2}\sqrt{-5+5}

f(x)=0

The minimum value of f(x) is equal to zero

so

The solution for f(x) is the interval [0,∞)

All real numbers greater than or equal to 0

Remember that

The range of a function is the complete set of all possible resulting values of y, after we have substituted the domain.

therefore

The range of the function is the interval [0,∞)

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