A cross-country skier moves 36 meters eastward, then 44
meters westward, and finally 22 meters eastward.
What is the magnitude and direction of the displacement ?

Answer:

Explanation:

Field characteristics

The strength of the field at the Earth's surface ranges from less than 30 microteslas (0.3 gauss) in an area including most of South America and South Africa to over 60 microteslas (0.6 gauss) around the magnetic poles in northern Canada and south of Australia, and in part of Siberia.

The net force acting on the mass of 2.0 kg along the incline plane is 12.8 N.

Force is the product of mass and acceleration.

To calculate the net force acting on the mass along the inclined plane, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the net force of the mass is 12.8 N.

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The velocity of car B after the calculation can be obtained as 5.5 m/s.

We have to look at the principle of the conservation of the linear momentum and that is what we need so as to be able to deal with the problem that we have in this question as we have it here.

We know that the total momentum of the system would have to be constant and the implication of this is that the momentum before collision must be the same as the momentum after collision if we have been able to designate the system as a closed system.

Using the formula as we have shown it, we know that;

Momentum before Collison must be equal to momentum after collision

As such we have the following as shown below;

(281 * 2.82) + (209 * 1.72) = (281 * 0) + (209 * v)

792.42 + 359.48 = 209 v

v = 5.5 m/s

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The weight of the block and normal reaction are equal in magnitude but opposite in direction. Also, the frictional force and applied force are equal in magnitude but opposite in direction.

The forces acting on the wooden block moving at a constant speed include the following;

The free-body diagram is presented below;

                                              N

                                              ↑

                               \(F_f\)      ←  ⊕  →   F

                                              ↓

                                              W

The block is moving at a constant speed, we will have the following;

\(W = N \\\\F = F_f\)

Thus, we can conclude that the weight of the block and normal reaction are equal in magnitude but opposite in direction. Also, the frictional force and applied force are equal in magnitude but opposite in direction.

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The pressure will become 2.68 atm when expressed in atmospheres.

The act of shifting a quantity's measurement between two units of measurement is known as unit conversion. Usually, multiplicative conversion factors are used, which change the value of the measured amount without altering its effects.

The metric system typically requires moving a decimal point in order to translate from one unit to another.

The given data is 39.5 \(lb/in^2\)

we have to convert it into atmospheres

The pressure is :

39.5  \(lb/in^2\) ×  \(\frac{1 atm}{ 14.7 lb/in^2}\)

because the conversion factor is 14.7  \(lb/in^2\)

thus the given pressure becomes ;

Pressure = 2.68 atm

The pressure will become 2.68 atm when expressed in atmospheres.

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Answer:

most likely it will stay the same

Answer:

D. A followed by B

Explanation:

You can see at section A solid Ice at temperature 0°C gets heated up for and all the energy generated from heating up the ice is used to break the bonds which holds the ice together as a solid .

while at Section B the liquid water at 100°C changes to vapor because the heat energy applied here breaks intermolecular bonds c.

The section where A is followed by C of the heating curve illustrate this process. The correct option is D.

The heating curve represents the association between the supply temperature of the heating system and the external air temperature.

As can be seen in section A reliable Ice at 0°C is heated, and all of the energy generated by heating the ice is used to shatter the bonds that hold the ice together as a solid.

While in Section B, liquid water at 100°C transforms to vapor because the heat energy applied here shatters the intermolecular bonds c.

Thus, the correct option is D.

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Answer:

the heart would fail to efficiently pump oxygenated blood to the body and lungs

Answer:

the heart is hard to pump

SWOT Analysis: Apple Inc. has a strong brand image and innovative product portfolio, but faces challenges such as high product prices and intense competition.

PESTEL Analysis: Apple Inc. is influenced by global political stability, economic conditions, changing consumer preferences, rapid technological advancements, environmental sustainability practices, and legal regulations.

Porter's Five Forces Analysis: Apple Inc. faces moderate threats of new entrants and supplier bargaining power, high buyer bargaining power and threats of substitute products, and intense competitive rivalry.

Value Chain Analysis: Apple Inc.'s value chain includes primary activities like logistics, operations, marketing, and support activities such as procurement, technology development, and human resource management.

SWOT Analysis of Apple Inc.:

PESTEL Analysis of Apple Inc.:

Porter's Five Forces Analysis of Apple Inc.:

Value Chain Analysis of Apple Inc.:

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Answer: To calculate the quantities related to the given electrical circuit, we can use the formulas related to charge, energy, and power.

a) Charge (Q):

The charge can be calculated using the formula: Q = I * t, where I is the current and t is the time.

Given:

Current (I) = 3 ohms (A)

Time (t) = 25 seconds

Q = 3 A * 25 s = 75 Coulombs

b) Energy (E):

The energy can be calculated using the formula: E = V * Q, where V is the voltage and Q is the charge.

Given:

Voltage (V) = 13 V

Charge (Q) = 75 C

E = 13 V * 75 C = 975 Joules

c) Energy transferred in 15 seconds:

To calculate the energy transferred in 15 seconds, we need to find the power first.

Power (P) can be calculated using the formula: P = V * I, where V is the voltage and I is the current.

Given:

Voltage (V) = 13 V

Current (I) = 3 A

P = 13 V * 3 A = 39 Watts

Now, we can calculate the energy transferred in 15 seconds using the formula: E = P * t, where P is the power and t is the time.

Given:

Power (P) = 39 W

Time (t) = 15 s

E = 39 W * 15 s = 585 Joules

Therefore, the answers are:

a) Charge = 75 Coulombs

b) Energy = 975 Joules

c) Energy transferred in 15 seconds = 585 Joules

Explanation:

The less air pushing down on the water effectively allows the water to boil easier. Think of the water molecules as a bunch of marbles bouncing around in a box with a lid. The less air pressure means the lid is easier to open from the force exerted by the bouncing marbles, allowing those particles to escape and turn into gas.

So in short, if you are in the mountains, then it'll take less time to cook food because water comes to a boil faster.

A. Decreased shell formation. pH is a measure of the acidity or basicity (alkalinity) of a solution. It is defined as the negative logarithm of the concentration of hydrogen ions (H+) in the solution.

A decrease in shell formation in marine organisms, such as corals and mollusks, can lead to an increase in carbon dioxide levels in the oceans. This is because these organisms help remove carbon dioxide from the water during shell formation, which helps to regulate the pH of the oceans. Without them, there will be an excess of carbon dioxide, leading to a decrease in pH levels, or ocean acidification. This process can have significant impacts on marine ecosystems and the organisms that depend on them.

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1)  C) When the X-ray photon scatters from the electron its speed remains same.

2)  C) When the electron is struck by the X-ray photon, the de Brogile wavelength stays the same.

3)  D) X-ray diffraction relies on the wave nature of the x-rays; Compton scattering relies on then particle nature.

What is photon model of electromagnetic waves?

According to this model, electromagnetic waves are composed of individual photons, each carrying a specific amount of energy. The energy of a photon is directly proportional to its frequency, meaning that higher frequency waves (e.g., ultraviolet or gamma rays) have more energetic photons than lower frequency waves (e.g., radio or microwave).

The photon model also explains the wave-particle duality of electromagnetic radiation. While electromagnetic waves can exhibit wave-like properties such as diffraction and interference, they can also behave like particles when interacting with matter, as demonstrated by the photoelectric effect.

1) The speed of a photon in vacuum is always constant, so when an x-ray photon scatters from an electron, its speed stays the same. However, its frequency and direction can change.

2) When an electron is struck by an x-ray photon, its kinetic energy can increase or decrease depending on the energy and direction of the photon. The de Broglie wavelength of the electron is related to its momentum, and therefore can also change as a result of the interaction.

3) X-ray diffraction and Compton scattering are two different phenomena that occur due to the interaction of x-rays with matter. X-ray diffraction changes the direction of the x-rays due to their wave nature interacting with the periodic arrangement of atoms in a crystal. Compton scattering, on the other hand, changes the frequency and direction of the x-rays due to their particle nature interacting with the electrons in the material. Therefore, option (d) is the best comparison between the two phenomena.

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Answer:

1) Its speed stays the same

2) Its de Broglie wavelength decreases

3) X-ray diffraction relies on the wave nature of the x-rays; Compton scattering relies on the particle nature

Explanation:

Answer:

Explanation:

Samantha walks along a horizontal path in the direction shown the curved path is a semi circle with a radius of 2 m while the horizontal part is for me what is the magnitude of displacement

Displacement is given by the straight line distance between P and Q. Displacement will be length of straight line joining P and Q

a semi circle with a radius of 2 m

Length of this straight line=4+diameter

=4+(2*2)

=8 m

The angle between the two forces is 91 degrees

In order to find the angle between two forces, we have to use the following formula: cos θ= (F₁.F₂)/(|F₁||F₂|)

Where F1 and F2 are the magnitudes of the two given forces, θ is the angle between the two forces and F1.F2 is the dot product of the two forces.

We have given two forces of 574 N and 577 N and the resultant force of 1142 N.

We can solve for the angle between the two forces as follows;

Resultant force = √(574² + 577² + 2×574×577×cos θ)1142

                          = √(574² + 577² + 2×574×577×cos θ)

cos θ = [(1142² - 574² - 577²)/2×574×577]

cos θ = -0.048

We know that cosine is negative in the second quadrant, so we need to find the angle in the second quadrant.cos⁻¹(-0.048) = 91.4°

Thus, the angle between the two forces is 91 degrees (rounded to the nearest integer as needed) which can also be written as π/2 radians.

The forces have been provided to us as 574 N and 577 N, and the resultant force is 1142 N.

We can now use the formula cos θ= (F₁.F₂)/(|F₁||F₂|) to calculate the angle between the two forces.

We know that the magnitude of the resultant force is the sum of the magnitudes of the two given forces.

Using this knowledge, we can find the angle between the two forces by first substituting the given values in the formula, and then solving for the angle.

In this case, cos θ is found to be -0.048. Since the cosine function is negative in the second quadrant, we can find the angle in the second quadrant by taking the inverse cosine of -0.048.

The result of this calculation is 91.4 degrees.

Therefore, π/2 radians or 91 degrees separate the two opposing forces. (rounded to the nearest integer as needed)

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Answer:2.67

Explanation:

Nun

The hydrogen atom can use the Rydberg equation to determine the energy of light emitted or absorbed. When electrons are raised from a lower energy level to a higher energy level, light is absorbed. When electrons relax from a higher energy level back down to a lower energy level, light is released.

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Answer:

To find the work done in moving the particle from the origin to x = 2, we need to integrate the force over the given interval.

The work done (W) is calculated by integrating the force function with respect to displacement (dx) from the initial position (0) to the final position (2):

W = ∫(0 to 2) (10x³ - 5) dx

Integrating the force function, we get:

W = ∫(0 to 2) (10x³ - 5) dx = [2.5x⁴ - 5x] evaluated from 0 to 2

Now, substituting the upper limit (2) and lower limit (0) into the equation:

W = [2.5(2)⁴ - 5(2)] - [2.5(0)⁴ - 5(0)]

 = [2.5(16) - 10] - [0 - 0]

 = 40 - 10

 = 30

Therefore, the work done in moving the particle from the origin to x = 2 is 30 units of work.

Explanation:

Answer:

V=w/q V= 1.2/0.4* 10 ^-3 V = 3 * 10 ^ 3 V = 3000 v

if its not correct let me know so I can figure it out

The first asteroid discovered, now classified as a dwarf planet, is Ceres. Ceres is the largest object in the asteroid belt, with a diameter of about 590 miles. It was discovered on January 1, 1801, by the Italian astronomer Giuseppe Piazzi. At the time, it was believed to be a new planet, but later it was reclassified as an asteroid.

Ceres is now classified as a dwarf planet, along with Pluto and Eris, because it has sufficient mass to have a nearly round shape and has cleared its orbit of most debris. It is located in the asteroid belt between Mars and Jupiter and is believed to be composed of a rocky core surrounded by a thick layer of ice. Ceres is also the only dwarf planet located in the inner solar system and is the closest dwarf planet to Earth.Ceres has been studied by several spacecraft, including NASA's Dawn mission, which orbited the dwarf planet from 2015 to 2018. The mission revealed many fascinating features of Ceres, including bright spots on its surface that were later determined to be salt deposits. The discovery of water on Ceres has also raised the possibility that the dwarf planet may have once had conditions suitable for life to develop. Overall, Ceres is a fascinating object that continues to captivate astronomers and space enthusiasts alike.

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Answer:

A

Explanation:

r= 5100m

acceleration of center=g= \(\frac{v^{2} }{r}\)

v= rw, Which is angular velocity X radius

put this in acceleration of center equation

= \(\frac{(rw)^{2} }{r} =g\)

= \(rw^{2} =g\)

= \(5100 . w^{2} = 9.8\)

\(w^{2} = 0.0019\)

=\(\sqrt{0.0019} = 0.0438\)

which is approximately A.

The wave's amplitude is represented by the term B in the equation y(x, t) = Bcos[2π(x/L - t/τ)]. In this case, B = 7.00 mm.

Part B: Wavelength
The wavelength is represented by the term L in the equation. In this case, L = 30.0 cm or 0.3 meters.
Part C: Frequency
Frequency (f) can be calculated using the formula f = 1/τ. Here, τ = 3.20 x 10^(-2) s. So, f = 1/(3.20 x 10^(-2) s) ≈ 31.25 Hz.
Part D: Speed of propagation
The wave's speed (v) can be calculated using the formula v = fλ, where λ is the wavelength. So, v = 31.25 Hz x 0.3 m ≈ 9.375 m/s.

Part E: Direction of propagation
The wave's direction of propagation can be determined by the sign in the argument of the cosine function. In this case, the equation is y(x, t) = Bcos[2π(x/L - t/τ)], which has a negative sign (-) between x/L and t/τ. This means the wave is propagating in the positive x-direction.

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The total time change of density n(x, t) as seen by a co-moving observer is proportional to x²e²«Voxt.

The density function is given by n(x, t) = no ext²e²«Voxt, where x is the spatial coordinate and t is the time coordinate.

To calculate the total time change of n(x, t) as observed by an observer co-moving with the fluid, we need to integrate n(x, t) with respect to time from an initial time to a final time while keeping x constant.

The result will be proportional to x²e²«Voxt, which represents the change in density at a given point in space as experienced by the co-moving observer.

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Consider a fluid motion at a velocity V-Voi with a space-time varying density such that. n(x, t) = no ext²e²«Voxt Find the total time change of n(x, e) as seen by an observer co-moving with the fluid

Answer:

C. Try an element in the same group as lithium.

Explanation:

Answer:

The answer is C.

Explanation:

I'm took the test on it

According to the information, the volume of water that leaves the pipe each second is 125 cm^3/s and the velocity of water in the smaller pipe is 25 m/s.

To calculate the volume of water leaving the pipe in one second can be calculated as follows:

V1 = A1 * v1

where,

A1 = cross-sectional area of the larger section

v1 = velocity of water at the larger cross-sectional area.

Substituting the given values, we get:

V1 = 100 cm^2 * (1.25 m/s) = 125 cm^3/s

Now, we can use the principle of continuity of flow, which states that the volume of water flowing per second is constant throughout the pipe. Therefore, the volume of water leaving the pipe through the smaller cross-sectional area in one second is also equal to V1.

The volume of water leaving the pipe in one second is:

V2 = A2 * v2

where,

A2 = cross-sectional area of the smaller section

v2 = velocity of water at the smaller cross-sectional area.

Substituting the given values and equating V1 and V2, we get:

V2 = V1 = 125 cm^3/s

To calculate the velocity of water in the smaller pipe we can use the principle of continuity of flow. According to this principle, the volume of water flowing per second is constant throughout the pipe.

Therefore, we can write:

A1 * v1 = A2 * v2

where,

A1 and v1 = cross-sectional area and velocity of water at the larger cross-sectional area

A2 and v2 = cross-sectional area and velocity of water at the smaller cross-sectional area.

Substituting the given values, we get:

100 cm^2 * (1.25 m/s) = 5 cm^2 * v2

Solving for v2, we get:

v2 = (100 cm^2 * 1.25 m/s) / 5 cm^2 = 25 m/s

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Answer:

copper isn't magnetic

Explanation: