(a) What is the minimum force of friction required to hold the system of Figure in equilibrium. Let W₁=100N and W₂=59N
(b) What coefficient of static friction between the 100N block and the table ensures equilibrium?

Net force , gravity, falling object, air resistance, force . this is the concept map obtained from the above given terms.

An item often experiences some air resistance as it descends through the air. The leading surface of the item collides with air molecules, creating air resistance. Several variables affect how much air resistance the item really experiences. To keep things straightforward, it may be noted that the object's speed and cross-sectional area are the two most frequent variables that directly affect the amount of air resistance. The quantity of air resistance rises with increasing speed. Greater air resistance is brought on by larger cross-sectional areas and gravity.

What causes an item to finally attain a terminal velocity when it encounters air resistance?

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Yes the acceptable move  that proves the two equation are equivalent.

Equivalent equation are algebraic equations that have identical solutions or roots. Adding or substracting the same number or expression to both side of an equation produce an equivalent equation.

Combine any like terms on each side of to the equation: x-terms with x-terms and constants with of the constants. Arrange the terms in the same by order, usually x-term before the constants. As if all of the terms in to  the two expressions are the  identical, then the two expressions is equivalent.

By observing both equations

In equation A : -3(x+9)=18

Divide the equation A by -3

=> (x+9)=-6

And this result equals to equation B

Hence both equations are equivalent

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The position that object could be found at some time is XA.

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Answer:

I would say B. would be the answer.

Explanation:

Sorry if I'm wrong

Therefore, if cars 17.0 m away appear 0.37 their normal size, the mirror's radius of curvature is -6.29.

In differential geometry, the radius of curvature, R, is the reciprocal of the curvature. Its radius is the same as the radius of the circular path that, at that specific moment, most closely matches the curve. The diameter of the a circle that, individually and collectively, fits a normal section the best seems to be the radius of curvature of surfaces. The curvature's length and radius is denoted by R, and its derivative by K, where R=1/K.

The diameter of a hollow sphere in which the spherical mirror was housed determines its radius of curvature. The radius of curvature is the distance between the pole and center of a spherical mirror.

Radius = Diameter/ 2 applies when the diameter is known. Radius = Circumference/2 can be calculated after the circumference is known. The radius is calculated using the formula Radius = ⎷(Area of the circle/π) when the area is known.

For the mirror, we can solve two equations:

1/f=1/d_0 -1/d_i

M= -d_i/d_0

Index I stands for a picture, while index 0 stands for the object.

Magnification in this instance is 0.37:

0.37= -d_i/d_0

-0.37d0 = di d0 =17.0m

di= -0.37 × 17.0

di = 6.29m

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Quantity B is greater is the correct option.

Let us consider the distance she drives per day is ' d '. For the 5 days, she drives 5d.

Given that, Shaundra averaged 20 miles per hour on monday and tuesday

Shaundra averaged 30 miles per hour on wednesday, thursday and friday

The time that she drives on monday and tuesday is nothing but the ratio of distance and speed i.e, d/20. The time that she drives on wednesday, thursday and friday is d/30.

The total time that can be calculated from the above information is:

⇒ 2 * d/20 + 3 * d/30 = d/5

The formula for average velocity can be written as total distance upon total time.

Average velocity = Total distance/ total time

Total distance is calculated as ' 5d '

Total time is calculated as ' d/5 '

So, average velocity = 5d / d/5 = 25

Thus, the average velocity is calculated to be 25 miles per hour.

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The need for an effective solar power system and restrictions on using solar power for mobile devices are requirements.

Any energy produced by the sun is referred to as solar energy. Solar energy is produced by the nuclear fusion that occurs in the sun. Helium atoms are produced during fusion inside the sun's core when protons from colliding hydrogen atoms fuse. Solar architecture, solar thermal energy, and solar power to generate electricity are only a few examples of the technologies that can harness the Sun's radiant light and heat.

When you generate power with solar panels, no emissions of greenhouse gases are put into the atmosphere. Solar energy is a key source of energy in the transition to the creation of clean energy since the sun produces more energy than humans could ever require.

Solar energy seems to be a cheap, abundant, and renewable source of power. It may be used to make energy, heat water, and cook meals. Solar cells can also be used to store the electrical energy produced by solar energy.

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Explanation: It is not clear from the information given what type of goods the water bottles and hydration belts are. The only information provided is that they are sold at a running store, which suggests that they may be related to running or fitness. However, without more information it is impossible to determine their specific type or classification.

Convex mirror always produces virtual images is the correct option.

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There have been 903.73 moles of air that are expelled from the residence each day.

Force is the term used to describe the physical violence applied to something. A perpendicular force is applied to the surface of the objects for each unit of area. The basic formula for pressures is F/A. (Force per unit area). Project phases are a pressure unit (Pa). Different types of pressure include absolute, atmospheric, differential, and gauge pressures.

Since the pressures are steady:

V1/T1 = V2/T2

In the evening, V1 = 900 m^3, and T1 = 288K.  

In the daytime, T2 = 298K, and V2 =?

V2 = V1*T2/T1 = 900*295/288 = 921.875 m^3

921.875 - 900 = 21.875 m^3

who venture outside during the day

V2/T2 = Vs/Ts

Vs = V2*Ts/T2 = 21.875*273/295 = 20.24 m^3

22.24 liters per mole, and 1000 liters per m^3, so

N = 20.24*1000/22.4

N = 903.73 moles.

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The pilot is correct since the planet's gravitational force will drag the spaceship toward the planet on its own.

Gravity, also known as gravitational force, pulls things with mass toward one other. Gravitational pull from Earth is a topic that we frequently consider. This force is responsible for keeping the body on the ground. Any item with mass, on the other hand, exerts a gravitational attraction on all other things with mass.

The gravitational force is called attractive because it constantly strives to bring masses together rather than pushing them apart. It is obvious that the gravitational force directly relates to the masses of the two interacting objects; larger, more massive objects will pull apart with a stronger gravitational force.

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One method of evolution is natural selection. More environment-adapted organisms are more likely to survive and pass on the genes that contributed to their success. Over time, species change and diverge as a result of this process.

As a result of natural selection, reproductive individuals pass on genetic changes that are advantageous to their progeny's survival. New creatures are created as a result, and they have a higher chance of surviving and reproducing.

For instance, giraffes have an advantage over other species because of their long necks, which have evolution to allow them to eat leaves that other species cannot. Longer-necked individuals were able to breed and pass on their trait to the next generation because they had access to superior food sources. Shorter-necked individuals would be less likely to survive and pass on their genes as a result of having fewer food availability.

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With the knowledge of kinematic and dynamics, the mass of the crate is 366.7 kg

Force can simply be defined as a pull or push. It is the product of mass and acceleration. It is a vector quantity.

Given that two horizontal force are exerted on a large crate. the first force in 1200N to the right. the second force is 650 N to the left. the crate is initially at rest. five seconds later, its velocity is 7.5m/s to the right.

Let us first list all the parameters involved

The net Force F = ma

We can find acceleration with formula

v = u + at

7.5 = 0 + 5a

5a = 7.5

a = 7.5/5

a = 1.5 m/s²

Then, F = ma

550 = 1.5m

m = 550/1.5

m = 366.7 kg

Therefore, the mass of the crate is 366.7 kg

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The current in the circuit will be 0.0167 Amperes when a light bulb is providing resistance and the batteries with 1.5 voltage.

A stream of charged particles, such as electrons or ions, travelling through an electrical conductor or a vacuum is known as an electric current. The net rate of electric charge flowing through a surface or into a control volume is how it is measured.

To calculate current the formula used is V= IR

                                                                 1.5/90 = I

                                                                 0.016 A = I

Electronic components such as resistors, transistors, capacitors, inductors, and diodes are connected via conductive wires or traces that allow an electric current to pass between them.

Hence, the current in the circuit will be 0.0167 Amperes when a light bulb is providing resistance and the batteries with 1.5 voltage.

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Consider a graphical representation (figure) of simple harmonic motion as described mathematically in equation x(t) A cos  (wt+Φ). When the particle is at point, P, on the graph, then:

velocity will be negative.

acceleration 'a' is also negative.

Anything that causes a change in velocity is referred to as an acceleration. You can only accelerate by changing your speed, direction, or both as velocity is a function of both speed and direction.

Equation of the graph is given by:

x(t) = A cos (wt+Φ)

differentiating with respect to t, we get-

dx/dt = - A sin (wt+Φ) w

or, v = - Aw sin (wt+Φ)

differentiating again with respect to t, we get-

d²x/dt² = -A w² cos (wt+Φ) = a (acceleration)

or, a = -A w² cos (wt+Φ)

Now, at position P,

A (amplitude) is positive.

(distance) x is positive.

velocity will be negative as A is positive, acceleration 'a' is also negative.

correct options are: a, f.

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The complete question is as follows:

Answer:

The answer is B

Explanation:

The train will appear to be moving slowly because what ayesha will be experiencing the relative velocity of the other train with her train. To find the relative velocity, if the train is moving in same direction

   V(ba)= V(b)- V(a)

  V(ba)= velocity of train B with respect to A

   V(a) = velocity of Ayesha's train

    V(b)= velocity of the other train

So relative velocity will be less than absolute velocity.

Plate tectonics, comet strikes, enormous floods, including wind-blown sediments hide or deteriorate impact craters, whereas the following do not: radiation degradation and solar heating.

An object that circles a planet or another object that doesn't belong to a star is called a moon. Moons can also orbit exoplanets, large comets, and other things in addition to planets. Moons are also referred to as natural satellites since they orbit other objects, which is another name for a satellite.

Your appearance shows the roiling cauldron of emotions, worries, longings, and obsessions that lies beneath your sun sign-based identity. It emphasizes the real self, along with its motivations and issues.

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inside a moving elevator, in free fall

Do you weigh the same inside an elevator?

We shall weight ourselves when the elevator is travelling at our normal weight. Because we are currently moving up or down the elevator at the same speed, nothing is changing our weight. However, once the elevator begins to move or stops, our bodies resist it.

What is the apparent weight when the elevator is running?

If the elevator accelerates downward, an is negative and the apparent weight is less than the real weight. There is no weight discernible if the elevator descends naturally. The apparent weight is zero because when a human and a scale are falling freely, they cannot clash.

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A satellite in orbit that moves quickly close to the earth and slowly farther away is not in uniform circular motion .

Now based on the choices provided such as ,

Therefore, merry-go-round will also be moving uniformly in a circle because of its continuous rotations per minute.

The complete question is here,

Which of the following is not in uniform circular motion? CD in a CD player spinning at 45 rpm orbiting satellite that speeds up near the earth and slows down far away jet fighter making a high-speed loop at 600 m/s merry-go-round that is 10.0 m in diameter and rotating at 2 rpm

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By the time Ernie arrives at Burt, the log has travelled 0.3 metres in relation to the coast.

define mass ?

The density and kind of atoms in any specific thing are referred to as the object's mass in science. Although mass can also be measured in pounds, the kilogramme (kg) is the SI unit of mass (lb).

Think of a pillowcase stuffed with feathers and one packed with bricks to rapidly grasp the notion of mass. Which one is heavier? The bricks have a larger mass because their atoms are heavier and denser. Because of this, although though both pillowcases are the same size and level of fill, one has a significantly higher mass than the other.

In this case, the mass is denoted by (m), while the distance is denoted by (x).

The 3.9m-long log weighs 260kg and is long. Burt weighs 30 kg, whereas Ernie weighs 40.5 kg.

Ernie accepts Burt's offer of a cookie and moves to his side of the log to take it.

By the time Ernie gets to Burt, the log should have travelled x metres. Consequently, using the formula above,

30(x)+260(X)+40.5(x-3.9)

≈0.3

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The statement will best describe the period of mass on spring, Start at A, go through B, C, and D, turn at E, go back through D, C, and B to A

define mass ?

The density and kind of atoms in any specific thing are referred to as the object's mass in science. Although mass can also be measured in pounds, the kilogramme (kg) is the SI unit of mass (lb).

Think of a pillowcase stuffed with feathers and one packed with bricks to rapidly grasp the notion of mass. Which one is heavier? The bricks have a larger mass because their atoms are heavier and denser. Because of this, although though both pillowcases are the same size and level of fill, one has a significantly higher mass than the other.

according to the hooks law statement will best describe the period of mass on spring, Start at A, go through B, C, and D, turn at E, go back through D, C, and B to A will describes the image.

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Recall is a method used for measuring retention which involves the verbal reproduction or repetition of learnt material.

Recall is a technique for gauging retention that entails repeating verbatim what has been learned. Basically, it comes in two varieties: serial recall and free recall. In serial recall, previously learned material is frequently repeated in the order in which it was first learned or after a predetermined order. Many of us can only remember certain information in a specific order. For instance, we can't immediately find a name in the phone book or a word in the dictionary that starts with "Res-."

As we turn the pages, we mentally recite the alphabet from A to R, making sure that R comes after the letters O, P, and Q and before the letters S, T, and so on. Similar to this, there are those

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A mass m at the end of a spring oscillates with a frequency of 0.71 Hz . When an additional 780 g mass is added to m, the frequency is 0.64 Hz, thus the value of mass is 3.376 kg

In terms of physics, frequency refers to the quantity of waves that pass through a given point in a unit of time as well as the number of cycles or vibrations that a body in periodic motion experiences over the course of a single unit of time.

Given that,

Frequency = 0.71 Hz

Mass = 780 g

After added to m, frequency becomes = 0.64 Hz.

Let the spring constant is k

k=m × w²

from the given info.

m × (0.71)² = (m+0.78) × (0.64)²

m ×[(0.71)²- (0.64)²] = 0.78 × (0.64)²

m = 0.78 × (0.64)² /[(0.71)²- (0.64)²]  

m = 0.319 / 0.0945

m = 3.376 kg

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Polarization of light can be achieved using a dichroic material like Polaroid by Selective absorption.

What is polarization?

Polarization is a characteristic of some electromagnetic radiations in which there is a specific relationship between the direction and strength of the vibrating electric field.

Because each wave's associated vibrating electric vector is perpendicular to the direction of transmission, light waves are transverse. Unpolarized light is made up of waves that are all traveling in the same direction while having their electric vectors oriented in a random manner around the propagation axis. All of the waves in plane polarized light have the same direction of vibration. The electric vector rotates in circular polarization with respect to the wave's direction of propagation. By reflecting light or passing it via crystals or other filters that only allow vibrations in one plane to flow through, light can be polarized.

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Advancing into the sea more breeding season is in the summer acquiring long toe nails to better grip ice nurturing their young for a longer period of time.

Antarctica is encircled by the Southern Ocean, which is typically characterized as starting at the edge of the continent (and its ice shelves) and continuing to the location of the 'polar front,' which separates it from the neighboring Pacific, Indian, and South Atlantic Oceans. The Ross Sea is the most southerly sea on Earth and is located in Antarctica in the Ross Embayment, between Victoria Land and Marie Byrd Land. Surface temperatures are often below freezing, although the Antarctic Bottom Water of the Weddell Sea typically ranges from -0,8 to 0 degrees Celsius (31.8 to 32 degrees Fahrenheit).

Where the Atlantic, Pacific, and Southern seas meet, at the Drake Passage, between Cape Horn in South America and the South Shetland Islands in Antarctica, are some of the world's choppiest waters since the currents here are unimpeded by any neighboring mainland.

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The classification of the phase changes include the following:

A gas and a liquid= Condensation and evaporation.

A gas and a solid= sublimation and deposition

A liquid and a solid= freezing.

Phase change is defined as the ability of matter to change from one form to another ( solid, liquid or gas) due to changes in its surrounding environment.

The classification of 0hase changes include the following:

Therefore, in the classification of pase change of matter, A gas and a liquid= Condensation and evaporation, a gas and a solid= sublimation and deposition, a liquid and a solid= freezing.

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The superposition principle's implication that distinct wave displacements alter every location at every instant in time is known as interference.

Water moves in a circular pattern as a result of energy traveling through it, creating waves. Water somehow doesn't, however, literally move in waves. In the ocean, waves carry energy rather than water, and if there is nothing in their path, they have the capacity to span a whole ocean basin.

A wave is an energetic disruption in a fluid that doesn't include any net particle motion. Elastic deformation, a change in pressure, a pulsed electromagnetic intensity, an electric potential, or a change in temperature are a few examples.

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4014 joules of energy are lost as a result of heat, light, sound, and material deformation.

What is the energy conservation law?

The ball's kinetic energy is 1/2 x 0.0109 x 8632 = 4058 joule.

the block's kinetic energy following the inelastic collision

= 1/2(1 + 0.0109)(0.0109×863/1.0109)² joule.

= 43.77 joule.

Thus, energy loss due to heat, light, sound, and material distortions is equal to 4058 joule minus 43.77 joule, or 4014 joule.

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The magnitude of the vector [tex]\vec C[/tex]  is 8.6.

A - B  is used to indicate the vector subtraction of two vectors a and b, and it simply involves adding the vector's negative for vector b.

given :

A = 5.7

angle from x axis = 90 -38 = 52

[tex]\vec A =[/tex] ( 5.7 cos 52,  5.7 sin 52)

B = 4.3

[tex]- \vec B[/tex] angle from x axis = 90 +24 = 114

[tex]- \vec B[/tex] = (4.3 cos 114 , 4.3 sin 114)

[tex]\vec A - \vec B = \vec A + ( - \vec B)[/tex]

= ( 5.7 cos 52,  5.7 sin 52) +  (4.3 cos 114 , 4.3 sin 114)

=( 5.7 cos 52 +4.3 cos 114 , 5.7 sin 52+ 4.3 sin 114)

= (3.51 - 1.75, 4.49+3.93)

[tex]\vec C[/tex] = (1.76, 8.42)

magnitude of [tex]\vec C[/tex]  = [tex]\sqrt{1.76^2+ 8.42^2}[/tex]

=[tex]\sqrt{3.10+70.9}[/tex] =[tex]\sqrt{74}[/tex] = 8.6

The magnitude of the vector  [tex]\vec C[/tex] is 8.6.

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Answer: No. Wifi, Cellphone or Microwave radiations does not affect human health.

Explanation:

There is no scientific studies that prove that non iodizing radiation have an adverse effect on human health. Any forms of cellular or satellite communications use non iodizing radiations. So even we use them for extended period of time they seems to be quite safe. As for microwave as well as radio waves and visible light , they all are non iodizing radiation. The one that may cause any ill effect on human body will be the UV radiations which is not in any of these. So all these are quite safe to use and amazing technology to make human lives better.