An archer fires an arrow horizontally from her shoulder, 1. 5 meters from the ground. It misses his target and buries itself in the ground 40 meters away. The archer figures he might as well calculate the launch velocity of the arrow to take his mind off it. How fast was the arrow going at the moment of launch?

Therefore, the magnitude of vector C is 25.

Given:A = 10x - 2yB = 5x + 4yC=2A + BNow we have to calculate the magnitude of vector C.Let's calculate each part of the vector C first;2A = 2(10x-2y) = 20x - 4yB = 5x + 4yC = 2A + B= (20x-4y)+(5x+4y)=25xNow we can calculate the magnitude of vector C by using the formula;|C| = √(Cx²+Cy²+Cz²)Here, we only have two dimensions, so the formula becomes;|C| = √(Cx²+Cy²)|C| = √(25²) = 25. Therefore, the magnitude of vector C is 25.

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51D is the strength S of the person's eye lens

Define lens's strength

The lens's construction material and the angle at which its curved surface is ground together define the lens's strength. Diopters (D), a unit of measurement for lens strength, represent how much light is bent. The strength of the lens increases with the diopter.

The optical component known as the objective is what collects light from the object under observation and concentrates it to create an actual image.

1/O + 1/I = S

O = 2cm

I = 100cm

S = 1/2 + 1/100

S = 51D

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The strength of the magnetic field in the center of the system, which is equally spaced from the wires. . B = μ0I/(2πr) for the magnetic field's strength.

And this is where the second important characteristic comes into play. The equivalent surface current density I = dI/ds =B = μ0I/(2πr), which is proportional to the magnetic field Br of the permanent magnet material, may be used to compute the magnetic field of permanent magnets. In this case, the permeability of open space is μ = 4 107 A/Tm.

The magnetic field lines encircle a long, straight wire when it is carrying a current I. You may find the magnetic field direction by circling the wire with your fingers while pointing your right thumb in the direction of the current.

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Answer:

2m 13\(\frac{1}{3}\)s

Explanation:

1.5m = 1s

200m = \(\frac{200}{1.5}\) × 1s

          = 133\(\frac{1}{3}\)s

          = 2m 13\(\frac{1}{3}\)s

Answer:

differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through the air and solid materials but also through the vacuum of space.

Explanation:

This means that electromagnetic waves can travel not only through the air and solid materials but also through the vacuum of space.

ANSWER:

Sphere B

STEP-BY-STEP EXPLANATION:

The time of the air depends on the mass, initial velocity and the height of the object, having the same mass and the same height, it depends only on the initial velocity.

The higher the initial velocity, the shorter the time in the air, therefore in this case the sphere B that has a lower velocity will be the one that will spend the longest time in the air.

Answer:

20 m

Explanation:

The ball travels 4 m up, then 16 m down.  It travels a total distance of 20 m.

The wavelength of a 650.00 Hz sound in air at room temperature and pressure, where the velocity of sound is 344 m/s, is approximately 0.529 m.

Sound waves travel through a medium by creating compressions and rarefactions. The wavelength of a sound wave is the distance between two consecutive points that are in phase, such as two compressions or two rarefactions. To calculate the wavelength, we can use the formula: wavelength = velocity of sound / frequency.

In this case, the frequency of the sound is 650.00 Hz, and the velocity of sound in air at room temperature and pressure is 344 m/s. Plugging these values into the formula, we get: wavelength = 344 m/s / 650.00 Hz = 0.529 m.

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Answer:

coins made with the combination of copper zinc and Nickel

A cloth is made of fabrics

A towel is made from cotton

an umbrella is made up of fiberglass

a sweater is made up of wool

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The ratio of the de Broglie wavelength of the electron in the region x > L to the wavelength for 0 < x < L can be determined by comparing their respective momenta.

Since the energy E of the electron is 4U0, its momentum p can be found using the relation E = p^2/2m, where m is the mass of the electron.

In the region x > L, the potential energy U(x) is constant, so the total energy is E = U0 + p^2/2m. The momentum p can be determined as p = sqrt(2m(E - U0)).

In the region 0 < x < L, the total energy is E = p^2/2m. The momentum p for this region is simply p = sqrt(2mE).

Taking the ratio of the de Broglie wavelengths λ1 and λ2 for the two regions, we have:

\(λ1/λ2 = p1/p2 = (sqrt(2m(E - U0))) / (sqrt(2mE))\)

Simplifying this expression, we get:

\(λ1/λ2 = sqrt((E - U0)/E)\)

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Answer:

the correct answer to your problem I believe would be B

Answer: Earthquakes

The movement of the tectonic plates causes earthquakes. There are different kinds of plate interactions, but basically it's like a rubber band being stretched then the energy is released in the form of the ground shaking.

The graphs display the function solution y = ex and three numerical solutions -Euler, Improved Euler, and Runge-Kutta- at different intervals. The Relative Deviation on the right measures the difference between the numerical solutions and the exact function solution.

The analysis of each set of graphs involves comparing the numerical solutions (Euler, Improved Euler, and Runge-Kutta) with the exact function solution y = ex. The Relative Deviation provides an indication of how closely the numerical solutions approximate the exact solution.

To analyze each set of graphs, follow these steps:

By examining the graphs and assessing the Relative Deviation, one can analyze the accuracy and performance of the numerical solutions -Euler, Improved Euler, and Runge-Kutta- in approximating the exact function solution y = ex at different intervals or iterations.

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The final velocity of Margy at the end of 100m is 4.5 m/s We are given:Initial velocity of Margy = 1.4 m/sAcceleration = 0.20 m/s²Distance covered by Margy = 100 mWhen Margy is running, her acceleration is given by a = 0.20 m/s², and the distance covered is d = 100 m.

Therefore, we can use the following equation:vf² = vi² + 2adHere, vi is the initial velocity, vf is the final velocity, a is the acceleration, and d is the distance.So,vf² = vi² + 2advf² = (1.4)² + 2(0.20)(100)vf² = 1.96 + 40vf² = 41.96vf = √41.96 ≈ 6.5 m/sHowever, Margy is only running for part of the distance. For the rest of the time, she is walking at a constant speed of 1.4 m/s.

To find her average velocity for the entire distance, we can use the following formula:average velocity = total distance / total timeThe total distance is 100 m, and the total time is 100 m / 1.4 m/s + 100 m / 6.5 m/s = 71.4 sTherefore, the average velocity of Margy for the entire distance is 100 m / 71.4 s ≈ 1.4 m/s.To summarize, Margy's final velocity at the end of 100 m is 6.5 m/s, but her average velocity for the entire distance is 1.4 m/s.

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Silicon wafers are sliced using a wire saw, which employs a thin wire coated with abrasive particles.

A silicon wafer is a material essential for manufacturing semiconductors, which are found in all kinds of electronic devices that enrich our lives.

Few of us have a chance to encounter an actual silicon wafer in daily life.

This ultra-flat disk is polished to a mirror-like surface, and made as free as possible of tiny surface irregularities, making it the flattest object in the world. It is also ultra-clean, virtually free of microparticles and other impurities.

These qualities are necessary so it can be used as the substrate material of today's state-of-the-art semiconductors.

Silicon wafers are sliced using a wire saw, which employs a thin wire coated with abrasive particles.

The wire is moved back and forth over the silicon crystal, gradually cutting through it to produce thin wafers of the desired thickness.

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Answer:

Because volume is determined as the product of length and width as well as height of an object.So change in any dimension can change the other two dimensions as well which brings about a greater change in volume by carrying out the product of the dimensions .

Explanation:

Length x width x height = Volume of a regular shaped object

Answer:

C

Explanation:

I got it right on the test !!

The student that is correct is C. Student B is correct because Newton’s 1st Law of Motion states that if the chair were to be exerting a force on the student, her motion would change.

According to Newton's third law of motion, there's an equal and opposite reaction force for every action force. It should be noted that when an individual sits on a chair, the chair is actually exerting a force back on her in reaction to the force exerted upon the chair.

Student A is incorrect because when she sits down on a chair, the force that she's exerting on the chair is not the only thing that happens because the chair exerts a force back. Therefore, as the chair were to be exerting a force on the student, her motion would change.

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The image is located 1.43 cm behind the concave mirror when the object is moved to a distance of 15 cm from the mirror.

To solve this problem, we can use the mirror formula:

1/f = 1/do + 1/di

where f is the focal length of the mirror, do is the object distance, and di is the image distance.

We know that the mirror is concave, so its focal length is negative.  We also know that the image produced is virtual, so di is negative.

Using the given information for the first case:

do = 6 cm

di = -7.5 cm

f = ?

1/f = 1/do + 1/di

1/f = 1/6 + (-1/7.5)

1/f = -0.0333

f = -30 cm

Now, we can use the mirror formula again to find the image distance when the object is moved to a new position:

do = 15 cm

di = ?

f = -30 cm

1/f = 1/do + 1/di

1/-30 = 1/15 + 1/di

-1/30 = 1/di - 1/15

-1/30 = (15 - di)/15di

di(-1/30) = (15 - di)/15

-1.5 + 0.05di = di

1.05di = 1.5

di = 1.43 cm

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Answer:

When matter changes from one state to another, it either absorbs energy—as when chocolate melts—or loses energy. For example, if you were to place the melted chocolate in a refrigerator, it would lose energy to the cold air inside the refrigerator. As a result, the liquid chocolate would change to a solid again.

Explanation:

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Answer:

first one,heat is a measure of.........

Answer:

A. NaF and MgS

Explanation:

The reaction equation is given as:

             Na₂S  +  MgF₂  →   2NaF  + MgS

The product of this reaction is  NaF and MgS.

In a double displacement reaction there is an actual exchange of partners to form new compounds. This reaction takes place between ionic compounds.

The driving force for the reaction is:

Answer:

h = 11.47 m

Explanation:

Initial speed pf the t-shirt gun is 15 m/s

We need to find the maximum distance covered by the t-shirt. It is based on the conservation of energy. The maximum distance covered is given by :

\(h=\dfrac{u^2}{2g}\\\\h=\dfrac{(15)^2}{2\times 9.8}\\\\h=11.47\ m\)

So, it will cover a distance of 11.47 m.

Variable 1 is distance and it is Independent.
Variable 2 is charge and it is Independent.
Variable 3 is force and it is Dependent.

a. To increase force, you need to change distance and/or charge.
b. To increase the force, you need to decrease the distance between the charges and/or increase the magnitude of the charges.

a. To decrease force, you need to change distance and/or charge.
b. To decrease the force, you need to increase the distance between the charges and/or decrease the magnitude of the charges.

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Answer:

Explanation:

No, not any of these substance will float in Methanol , simply because Methanol has a density of 0.79 g, if you put any substance that weighs more than 0.79 g, it will sink, it all depends on the weight if it is more or less than methanol  

2: D=m/v

D=135/50 = 2.7 g/cm³ ( Aluminum)

D=M/V

if two objects has the same mass but one has larger volume, then te one with larger volume has less density

example : 2 objects

mass of both=350

volume of the first one=500 and  the other 750

D1=M1/V1 = 350/500 =0.7

D2 = M2/V2 = 350/750 = 0.4666

D1 is larger than D2( with larger volume )

Answer:

b. Thermal energy will flow from your hand to the snowball.

Explanation:

Answer:

B

Explanation:

To determine the greatest uniform load w that can be applied to the beam without causing AB or CB to buckle, we need to calculate the critical load for each suspender bar.

The critical load for a pin-connected suspender bar can be calculated using the following formula:

Pcr = (π²EI)/(KL)²

Where Pcr is the critical load, E is the modulus of elasticity of the material, I is the moment of inertia of the cross-section, K is the effective length factor, and L is the length of the bar between the pins.

Assuming the suspender bars are all identical, we can calculate the critical load for one bar and multiply by three to get the total critical load for all three bars.

Using the given dimensions and properties of A-36 steel, we can calculate the moment of inertia of the cross-section:

I = (1/12)bh³ = (1/12)(6.85 in)(0.5 in)³ = 0.044 in⁴

We can also calculate the effective length factor using the following formula:

K = 1.0 for pinned-pinned bars

Using these values and assuming a length of 9.5 in between the pins, we can calculate the critical load for one bar:

Pcr = (π²E(0.044 in⁴))/((1.0)(9.5 in))²
Pcr = (9.87²)(29,000 ksi)(0.044 in⁴)/(90.25 in²)
Pcr = 7,080 lb

Multiplying by three, we get the total critical load for all three bars:

Pcr,total = 3Pcr = 3(7,080 lb) = 21,240 lb

Therefore, the greatest uniform load w that can be applied to the beam without causing AB or CB to buckle is 21,240 lb.

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