You are in the year where the earth has no more land available for houses you decide to build an apartment up and need things to survive in each earths 5 layers (troposphere,stratosphere, mesosphere, thermosphere, exosphere) Question: what things would you need to survive the thermosphere(really hot it is 2000 degrees fahrenheit)

The distance from lens 1 to the final image for the system is -5.4 cm.

The height of an image divided by the height of an object is known as the magnification of a lens. Additionally, it is provided in terms of object and image distance. It is equivalent to the proportion of object distance to image distance. m = h ′ h = v u. m is the magnifying factor.

focal length of lens : f1 = -7cm ; f2 = 14cm

distance from the object : d1 = 24cm : d2= 35 cm

      => 1/f1 = 1/d1 + 1/di

       =>1/-7 = 1/24 + 1/di

di=> -5.4 cm

Magnification of image = focal length/ (object distance - focal length).

The distance between the object and the thin lines is known as the image distance. The image distance is the separation between the picture and the narrow lens. A feature of a narrow lens is its focal length, which specifies the distance at which parallel rays come into focus.

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The article "Sunrise, Sunset...or Not?" by ReadWorks has a more formal tone compared to "The Ever-Changing Sky" by Megan McGibney.

In "Sunrise, Sunset...or Not?" the author uses scientific and technical terms such as "counterclockwise," "Arctic Circle," and "phenomenon," and provides a detailed explanation of the scientific reasoning behind the rising and setting of the sun.

In contrast, "The Ever-Changing Sky" by Megan McGibney has a more casual tone, using more colloquial language such as "clear day," "bright and shiny," and "People have always looked up at the sky with wonder." The author also uses phrases like "guess how long" and "right!" which implies that the author is addressing a less formal audience and is being conversational.

In all, "Sunrise, Sunset...or Not?" has a more formal tone because of its use of technical language, explanation of scientific concepts, and a generally informative and explanatory writing style.

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Sunrise, Sunset...or Not?

by ReadWorks

The sun is a wonderful thing for Earth. It is a star that heats the planet and makes life on

Earth possible. In addition, its light shines onto the planet. It is Earth's ultimate source of

energy.

Summer days may be longer than winter days, but for most people, the sun seems to do the

same thing each day: it appears to come up in the east for the day, and it appears to go down

in the west for the night. The sun looks like it rises in the east and sets in the west because of

how the earth spins in space. It spins toward the east, or counterclockwise. This means that

when most people look at the sky in the morning, the sun will first appear in the east.

The earth takes 24 hours to complete one turn. For most places on Earth, there is a daytime

and nighttime every 24 hours. But in some places for many days at a time, the sun might stay

up in the sky, or it might not even come up above the horizon.

In some parts of the world, the sun can be up in the sky for months. During part of the spring

and summer in Earth's Northern Hemisphere, the Northern Hemisphere is tilted towards the

sun so much that the sun in northern Alaska, which is located in the Arctic Circle, never goes

below the horizon. The Arctic Circle is an area at the top of the earth. In Barrow, Alaska, the

sun doesn't set for almost three months! This phenomenon is called the midnight sun, when

the sun has not set at midnight. Try sleeping through that!

During parts of the fall and winter in Earth's Northern Hemisphere, the Northern Hemisphere

is tilted in such a way that the sun doesn't come over the horizon in northern Alaska for a little

over two months. Therefore, nights last more than 24 hours. This phenomenon is called the

polar night. Although the sun never rises above the horizon during parts of the fall and winter

in the Arctic Circle, enough light often shines so that people who live there don't need

The Ever-Changing Sky

The Ever-Changing Sky

by Megan McGibney

Look up at the sky on a clear day. You will see the sun. It is bright and shiny, warming much of

what its light touches. Look up at the sky again at night. You may see the stars. They are also

bright and shiny, glimmering in the dark sky. You may also see the moon. It looks bright and

shiny, reflecting light from the sun. People have always looked up at the sky with wonder.

Some have even studied the sun, moon, and stars. These people, called astronomers, have

learned that those objects in the sky do not stay in the same place all the time.

The Ever-Changing Sky

extra quarter of a day.

Let's take a closer look at the moon. The earth does not revolve around the moon. Instead,

the moon revolves around the earth. It takes the moon about four weeks to complete a

revolution around the earth. The portion of the moon we, here on Earth, see changes over

this period of about four weeks as the moon's position around the earth changes. The

moonlight we see at night is the moon's reflection of sunlight onto Earth. The different ways

the moon appears to us are known as the moon's phases. The moon's phases depend on the

moon's position in relation to the earth and the sun.

The four-week period starts and ends with the new moon. The new moon cannot be seen

because the side of the moon lit by the sun is facing away from the earth.

Use the articles "The Ever-Changing Sky" and "Sunrise, Sunset...or Not?" to answer

questions 6.

6. Which article has a more formal tone? Support your answer with details from both texts.

Answers will vary.

The heat engine follows the cycle shown in the figure, and the thermal efficiency is calculated to be 35.6%. For process 1-2, WS = -7.14 J, Q = -20.04 J, delta Eth = -12.90 J; for process 2-3, WS = -7.14 J, Q = -7.14 J, delta Eth = -12.90 J; for process 3-1, WS = 7.14 J, Q = 13.21 J, delta Eth = 5.07 J.

Part A: WS = -7.14 J, Q = -20.04 J, delta Eth = -12.90 J

Part B: WS = -7.14 J, Q = -7.14 J, delta Eth = -12.90 J

Part C: WS = 7.14 J, Q = 13.21 J, delta Eth = 5.07 J

Part D: Thermal Efficiency = 35.6%

Part A: WS = -7.14 J, Q = -20.04 J, delta Eth = -12.90 J

To calculate WS, Q and delta Eth for process 1-2, we need to calculate the change in internal energy between the two states. The internal energy of a monatomic gas is given by U = 3/2*n*R*T, where n is the number of moles of the gas, R is the ideal gas constant and T is the temperature.

For process 1-2:

U2 - U1 = -12.90J

To calculate Q, the equation Q = U2 - U1 can be used.

Q = U2 - U1 = -12.90J

To calculate WS, the equation WS = Q - (U2 - U1) can be used.

WS = Q - (U2 - U1) = -20.04J - (-12.90J) = -7.14J

Part B: WS = -7.14 J, Q = -7.14 J, delta Eth = -12.90 J

To calculate WS, Q and delta Eth for process 2-3, we need to calculate the change in internal energy between the two states. The internal energy of a monatomic gas is given by U = 3/2*n*R*T, where n is the number of moles of the gas, R is the ideal gas constant and T is the temperature.

For process 2-3:

U3 - U2 = -12.90J

To calculate Q, the equation Q = U3 - U2 can be used.

Q = U3 - U2 = -12.90J

To calculate WS, the equation WS = Q - (U3 - U2) can be used.

WS = Q - (U3 - U2) = -12.90J - (-12.90J) = -7.14J

Part C: WS = 7.14 J, Q = 13.21 J, delta Eth = 5.07 J

To calculate WS, Q and delta Eth for process 3-1, we need to calculate the change in internal energy between the two states. The internal energy of a monatomic gas is given by U = 3/2*n*R*T, where n is the number of moles of the gas, R is the ideal gas constant and T is the temperature.

For process 3-1:

U1 - U3 = 5.07J

To calculate Q, the equation Q = U1 - U3 can be used.

Q = U1 - U3 = 5.07J

To calculate WS, the equation WS = Q - (U1 - U3) can be used.

WS = Q - (U1 - U3) = 5.07J - (-5.07J) = 7.14

Part D: Thermal Efficiency = 35.6%

The thermal efficiency of a heat engine is given by the equation η = (Wnet/Qh) x 100, where Wnet is the net work output of the engine and Qh is the heat input to the engine.

For this heat engine, Wnet = WS1 + WS2 + WS3 = 7.14J + (-7.14J) + (-7.14J) = -7.14J and Qh = Q1 + Q2 + Q3 = -20.04J + (-7.14J) + 13

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The initial energy stored in the capacitor is 1.5E+6 J and the initial current through the patient I= 25.0 A.

The initial energy stored in the capacitor can be found using the formula for energy stored in a capacitor U₀=1/2CV^2 Plugging in the given values, we get:

U₀=1/2*(50E-6F)*(6000V)^2

U₀=1.5E+6 J

(b) The initial current through the patient can be found using Ohm's law, which states that I = V/R. Plugging in the given values, we get:

I = 6000V/240Ω

I= 25.0 A

(c) The energy dissipated in the patient during the 1.0 ms can be found by multiplying the power by the duration. The power can be found using the formula:

P = IV = (25A)(6000V) = 150,000 W. So the energy dissipated is:

Energy = P * t

= 150,000W * 0.001s

Energy=150 J

(d) To compare the average power supplied by the power source with the average power delivered to the patient, we need to know the power of the power source. Since the capacitor is charged to 6.0 kV in 2.0 s, the power can be found by:

Power = (Energy) / (time)

= (1.5E+6 J) / (2.0s)

Power= 750,000 W

So, the average power supplied by the power source is 750 kW and the average power delivered to the patient is 150 W.

(e) A capacitor is used in a defibrillator to store a large amount of energy in a small package. The energy stored in the capacitor can be discharged quickly to provide a large current to the patient's heart to restore normal beating.

The capacitor also allows the defibrillator to deliver a high-energy shock without drawing a large current from the power source, which improves the safety of the device.

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The compass felt the magnetic field around wire where current flows in upward direction. The vector direction of magnetic field around wire (current ON) according to thumb rule is anti-clockwise.

A wire develops a ring-shaped magnetic field as current flows through it. This magnetic field has the ability to divert the needle of a magnetic compass. Closer to the wire, the magnetic field is stronger, and its strength grows as the current does as well. This magnetic field is a result of the circular wire's current flow, and the circular wire's centre has straight magnetic field lines. By using the right hand thumb rule, the magnetic field's direction can be determined.

it is as a result of the magnetic field that is created when current is transferred through a current-carrying conductor.

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365541.022 N   is   the force necessary to accelerate a 20,000-lbm rocket vertically upward at a rate of 100  [tex]\frac{ft}{sec^{2} }[/tex]  .

20000 lbm = 9071 . 8474 kg

100 [tex]\frac{ft}{sec^{2} }[/tex] = 30.48 [tex]\frac{mts}{sec^{2} }[/tex]

and g = 9.814  [tex]\frac{mts}{sec^{2} }[/tex]

force required = mass * (acceleration of  rocket + g)

= 9071.84748*(30.48+9.814)

= 365541.022 N

A force in physics is an impact that has the ability to change an object's motion. As a linear momentum, a force is one with both magnitude and direction. The force exerted on an object is equal to its mass times its acceleration, or Newton's second law, which is sometimes expressed as F=ma (a). Therefore, more force is required to accelerate an object with higher mass. Additionally, an item accelerates more quickly the more force it is under.

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The magnitude and direction of the resultant force (F=10N+5N+4N+6N) when four forces of magnitude 10N, 5N, 4N, and 6N operate on an object in the directions of north, west, east, and south, respectively, is 25N.

In terms of physics, magnitude is just "distance or quantity." It displays an object's size, direction, or motion in absolute or relative terms. It is employed to indicate the size or scope of something. The word "magnitude" in physics frequently denotes a size or quantity.. Something's magnitude is determined by its size. For example, a car moves faster than a bike with terms of speed. The speed difference between the car and the bike in this case is greater. It reveals the absolute or relative size or direction that an object moves when in motion.

Speed is defined as the magnitude of velocity, and the magnitude of the slope of the displacement-time graph provides the speed. Since the slope gets steeper as we move from A to B, Speed is increased as a result between points A and B.

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According to the law of reflection, the incident light ray, the reflected light ray, and the normal between them may or may not lie in the same plane. option (b) is correct.

What is law of reflection ?

The law of reflection is the idea that when light rays hit a smooth surface, their angles of incidence and reflection are equal. Additionally, the planes of the incident ray, the reflected ray, and the normal to the surface are all in alignment.

What is incident ray ?

The rectilinear light ray known as an incident ray is one that strikes a surface (surface). Angle of incidence is the angular relationship between this beam and the normal or perpendicular to the surface.

Therefore, according to the law of reflection, the incident light ray, the reflected light ray, and the normal between them may or may not lie in the same plane. option (b) is correct.

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Explanation:

The three main types of energy that play a role in Earth's processes are: solar energy, kinetic energy, and potential energy.

In the stages of the water cycle, energy moves between Earth's surface and atmosphere in the following way:

Therefore, energy moves between Earth's surface and atmosphere by the conversion of potential energy to kinetic energy and vice versa.

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The angle between the two beams in the glass to be 42.98°.

Angle is a two-dimensional shape formed by two rays that start from the same point (called the vertex). Angles are measured in degrees, with a full circle being 360 degrees. The size of an angle can range from 0° (no angle) to 180° (a straight line). Angles that measure more than 180° are called reflex angles.

To solve this question, we must use Snell's law. Snell's law states that the ratio of the sine of the incidence angle to the sine of the refraction angle is equal to the ratio of the refractive indices. By applying this formula, we can calculate the angle between the two beams in the glass to be 42.98°.

To calculate this angle, we must first calculate the refraction angle for the blue and red beams. To do this, we can set up the following equations:

Sin (50°) / Sin (θb) = 1.680 / 1

Sin (50°) / Sin (θr) = 1.621 / 1

By solving for θb and θr, we can find that the refraction angles for the blue and red beams are 36.51° and 34.47°, respectively.

Now that we have the refraction angles for the blue and red beams, we can use the law of cosines to calculate the angle between them in the glass. The law of cosines states that the square of the angle between two sides of a triangle is equal to the sum of the squares of the other two sides minus twice the product of the other two sides multiplied by the cosine of the angle between them.

We can set up the following equation to calculate the angle between the blue and red beams in the glass:

Cos (θ) = (36.51^2 + 34.47^2 - 50^2) / (2 * 36.51 * 34.47)

By solving for θ, we can find that the angle between the two beams in the glass is 42.98°.

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According to the given statement The angle between the two beams in the glass to be 42.98°.

Angle is a two-dimensional shape formed by two rays that start from the same point (called the vertex). Angles are measured in degrees, with a full circle being 360 degrees. The size of an angle can range from 0° (no angle) to 180° (a straight line). Angles that measure more than 180° are called reflex angles.

To solve this question, we must use Snell's law. Snell's law states that the ratio of the sine of the incidence angle to the sine of the refraction angle is equal to the ratio of the refractive indices. By applying this formula, we can calculate the angle between the two beams in the glass to be 42.98°.

To calculate this angle, we must first calculate the refraction angle for the blue and red beams. To do this, we can set up the following equations:

Sin (50°) / Sin (θb) = 1.680 / 1

Sin (50°) / Sin (θr) = 1.621 / 1

By solving for θb and θr, we can find that the refraction angles for the blue and red beams are 36.51° and 34.47°, respectively.

Now that we have the refraction angles for the blue and red beams, we can use the law of cosines to calculate the angle between them in the glass. The law of cosines states that the square of the angle between two sides of a triangle is equal to the sum of the squares of the other two sides minus twice the product of the other two sides multiplied by the cosine of the angle between them.

We can set up the following equation to calculate the angle between the blue and red beams in the glass:

Cos (θ) = (36.51^2 + 34.47^2 - 50^2) / (2 * 36.51 * 34.47)

By solving for θ, we can find that the angle between the two beams in the glass is 42.98°.

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Answer:

t = 2.21 s

Explanation: s = 98 m

                      u = 0 m/s

                      a = 40 m /s ^2

                     Using the second equation of motion :

                      s = ut + 1/2 at ^2

                      98 = 0 × t + 1/2 × 40 × t × t

                       98 = 0 + 20 t ^2

                       98 = 20 t ^2

                        98 / 20 = t ^2

                        4.9 = t ^2

                         t = √ 4.9

                          t = 2.21 s

The amount of mercury needed to fill a 0.250-L flask is 3.38 kg.

The correct option is A.

An object's inertia, or barrier to a change in motion, is quantified by its mass. It is a basic physical characteristic that is measured in kilograms (kg), grams (g), and pounds (lbs) (lbs). Any item's mass is just an intrinsic feature, which means it measures the physical characteristics of the thing without taking into account outside factors. The relationship between mass and other physical characteristics like density, force, and speed is a common one in scientific calculations.

To do so, first convert the volume of 0.250 L supplied to cubic centimeters (cm3), which is equal to 250 cm3. To acquire 3375 g of mercury, multiply this amount by the density of mercury, which is 13.5 g/mL.

Density of water = 1   (1 g / ml)

.25 L = 250 ml   (milleters)

mass of flask = 250 ml * 1 g / ml = 250 g     (water to fill flask)

Equivalent mass of Hg = 13.5 * 250 g = 3375 g = 3.38 kg

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Explanation: A projectile motion is characterized by a motion whose path is alike to that of an arc. It already has its derived equations. For the maximum height H and the maximum range R, the equations are:

H = v₀²sin²θ/2g       ;       R = v₀²sin(2θ)/g

As you can observe, they are almost alike. Since they both contain v₀²/g, let's isolate this term for both equations:

v₀²/g = 2H/sin²θ

v₀²/g = R/sin (2θ)

Equating both equations:

2H/sin²θ = R/sin (2θ)

H = Rsin²θ/2sin(2θ)

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The bullet's final momentum is 0 m/s, hence the change in momentum is 100 000 m/s.

The product of an object's mass and velocity is changed, and this is known as the change in momentum (p). To alter an object's momentum, a force is needed. The momentum of the item may change due to the applied force, as well as its direction. A substance's rate of change in momentum is inversely proportional to the applied resultant force and moves in the same direction. Therefore, we can state that the force applied equals the rate of change of momentum. It is well known that mass times velocity equals momentum..

Keep in mind that the temporal rate of change of the total momentum is zero when there are no outside forces operating on the system. In other words, the total momentum of the system does not vary over time if the sum of the external forces is zero. In this situation, we say that the system's momentum is conserved.

Mass (m)=10cm=0.01kg. Time T=0.003s

Velocity v f=300m/s,v i=0m/s Acceleration (a)= 0.003

300

=100000m/s 2

∴Force=mass×acceleration

Or, F=(0.01)×(100000)=1000N.

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Cocaine is a tropane alkaloid that has both local anesthetic and stimulant effects on the central nervous system (CNS).

Cocaine inhibits the re-uptake of dopamine, serotonin, and norepinephrine into pre-synaptic neurons by binding to the transport proteins for these neurotransmitters. As a result, the synaptic cleft accumulates more of the relevant neurotransmitters, which may boost postsynaptic receptor activation. Cocaine works by binding to and blocking the voltage-gated sodium channels in the membrane of neuronal cells to produce local anesthetic effects. Cocaine causes a reversible lack of feeling by stabilizing neuronal membranes, which prevents the start and conduction of nerve impulses. A benzoic acid ester, cocaine was first employed as a local anesthetic.

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α decay:

217  At    ​→        4 α  + 213 Bi

85                    2          83

β decay:

213 Bi     →       0 e  +  213 Po

83                   -1           84

α decay:

213 Po    →        4 α  + 209 Tl

84                    2           82

β decay:

209 Tl     →        0 e  + 209 Pb

82                    -1          83

What occurs when radioactive material decays?

A radioactive atom will naturally emit radiation in the form of energy or particles in order to transition into a more stable state. The difference between radioactive material and the radiation it emits must be made. Radioactivity types: beta, gamma, and alpha decay.

A typical type of radioactive decay known as "alpha decay" occurs when a nucleus emits an alpha particle (a helium-4 nucleus). A nucleus emits beta particles during the typical radioactive decay process known as beta decay. The offspring nucleus will be more atomically massive than the parent nucleus.

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(a) The diver’s speed 5.70 m above the water’s surface is 9.6 m/s.

(b) The diver’s speed just before striking the water is 14.28 m/s.

(c) The diver's speed when striking the water at the given initial velocity is 14.59 m/s.

The diver’s speed 5.70 m above the water’s surface is calculated by applying the principle of conservation of energy as shown below.

v = √ ( 2gh )

where;

h = 10.4 m - 5.7 m = 4.7 m

v = √ ( 2 x 9.8 x 4.7  )

v = 9.6 m/s

The diver's speed just before striking the water is calculated as follows;

v = √ ( 2gh )

where;

v = √ ( 2 x 9.8 x 10.4 )

v = 14.28 m/s

The diver's speed when striking the water at the given initial velocity is calculated as;

v² = u² + 2gh

where;

v² = (3)² + 2(9.8)(10.4)

v² = 212.84

v = √ (212.84)

v = 14.59 m/s

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The energy stored in the capacitor dus to 10C charge and 40V potential difference is 200 Joules.

Firstly we will need to calculate the capacitance of the capacitor. It will further help in calculation of stored energy. The formula to be used for each of the following is -

Q = CV and E = 1/2CV², where Q represents charge, E represents energy, C is capacitance and V is voltage.

Keep the values in formula -

C = 10/40

Performing division

C = 1/4

E = 1/2×1/4×40²

Taking square

E = 1/2×1/4×1600

Performing multiplication and division

E = 200 J

Hence, the stored energy is 200 Joules.

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Option A is correct. It has been hypothesized that variations in solar output could have an impact on our climate, both directly by altering the pace.

Earth and atmosphere are heated by the sun and indirectly by altering cloud formation processes. Mid-latitude temperate regions exhibit larger seasonal variations in surface temperature than the poles or the tropics; from summer to winter, temperate zones see temperature changes of 8 to 15 degrees Celsius, compared to just 2 degrees Celsius in polar and tropical regions. Energy emitted from the sun in all directions is known as solar radiation. Solar radiation is not the energy that the planet emits. Cosmic rays are any radiation that is sent into space at random. Our seasons are more intense the more tilted Earth is because each hemisphere experiences more solar radiation during its summer.

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We know the Logistic Equation is dP/dt = r·P(1-P/K) . So twist the given derivative to the logistic form: dy/dt = 10·y(1-y/600) . Then we could see the K = 600 , which is the limit, the Carrying capacity.

To model population growth using a differential equation, we first need to introduce some variables and relevant terms. The variable  t

will represent time. The units of time can be hours, days, weeks, months, or even years. Any given problem must specify the units used in that particular problem. The variable  P will represent population. Since the population varies over time, it is understood to be a function of time. Therefore we use the notation  P(t)

 for the population as a function of time. If  P(t)

 is a differentiable function, then the first derivative  dPdt

 represents the instantaneous rate of change of the population as a function of time.

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The forces in the magnetic field is attractive in nature. Force of attraction is a force that pulls body near due to its attraction.

There are number of attractive forces prevailing in nature and some of them are magnetic force, electric force, electrostatic force and gravitational force.

Magnetic force, is attraction or repulsion that arises between electrically charged particles because of their motion. Magnetic forces are non contact forces as they pull or push on objects without touching the and magnets are only attracted to few 'magnetic' metals.

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The tension force on both strings is the same. The tension is 3.9 N 10 N 3.3 N S,0 N if each string is at a 40-degree angle to the vertical. launching the video player.

T = (m g) + (m a), where "g" denotes the acceleration caused by gravity of any objects the rope is supporting and "a" denotes any additional acceleration on any such objects, can be used to represent the tension in a given rope.

The force transferred through a rope, string, or wire when pushed by forces acting from opposite sides is referred to as tension. The tension force is applied along the entire length of the wire and exerts an equal amount of strain on the bodies at each end.

You can write it down as FC = mv2 /r. The centripetal force is equal to the total of the object's weight (in grammes) and the tension in the string when an object attached to a string is moving in a vertical circular motion.

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Attribute conformity is one that classifies each item in the sample as either having some attribute or not having it.

Variation present in your measurement system will affect the quality of the product and can damage your company's brand.

Purpose of Attribute measurement system analysis:

Accuracy check:

To access the customer standard, need to fulfill the customer's requirement, which means MSA performs to identify how good is our measurement system with our masters.

Precision check:

To determine that, the inspector can measure correctly. Is he checking with the same criteria across all shifts, machines, etc… to measure and evaluate parts and also called Repeatability

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Option C is the correct answer .

What is velocity ?

Velocity, a quantity that indicates the speed and direction in which a point moves. Points always move tangent to the path. For example, for a circular path, its direction is always perpendicular to the line (radius) from the point to the center of the circle. The velocity magnitude (velocity) is the fraction of time a point moves along its trajectory.

If a point travels a certain distance along a path in a certain time interval, the average speed during that interval is equal to the distance traveled divided by the time taken. For example, the average speed of a train traveling 100 km in 2 hours is 50 km/h

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Answer: the last one

Explanation: i did this before lol

Answer:It might seem small, but atmospheric dust is a big deal. Consisting (mostly) of tiny pieces of metal oxides, clays and carbonates, dust is the single largest component of the aerosols in Earth's atmosphere, and it likely has a significant impact on the Earth's climate, as it effects a wide range of phenomena, including from temperatures in the Atlantic Ocean to the rate of snowmelt in the southwestern U.S. Dust may also affect hurricanes, as recent research based on data sets dating back to the 1950s suggests an inverse relationship between dust in the tropical North Atlantic and the number of Atlantic hurricanes during the past several decades.

Explanation:

For a converging lens, the focal point is the point at which converging light rays cross; for a diverging lens, the focal point is the point from which diverging light rays appear to originate.

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