many bird wings are more convex on the upper surface than they are on the lower surface. this enables the wing to provide greater lift because a. air moves more slowly over the top surface of the wing than over the lower surface. b. air moves more quickly over the top surface of the wing than over the lower surface. c. the pressure above the wing is greater than below the wing. d. the pressure above the wing is less than below the wing.

ANSWER:

294 N

STEP-BY-STEP EXPLANATION:

We can calculate the weight as follows:

Replacing:

Weight is 294 N

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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Answer:

the lion will miss the zebra by 3 meters

Explanation

The zebra has gone 23.75m after 5 seconds

and the lion can only go 20 m/s

The lion can not catch zebra.

A diagram is attached below which describe situation of question.

The speed of Zebra is,

      \(v=u+at=0+4t=4t\)

Where u is initial speed of zebra.

The speed of lion is 20m/s.

The lead in speed by lion for every second is \((20-4t)\).

             \((20-4t)*t=60\\\\20t-4t^{2}=60\\ \\t^{2}-5t+15=0\\ \\t=\frac{5\pm\sqrt{(-35)} }{2}\)

Here time is imaginary.

Therefore, The lion can not catch zebra.

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Answer:

On Bode's advice, Herschel named his newly discovered planet after: the Greek god Uranus.

Explanation:

Herschel named his newly discovered planet Uranus on Bode's advice for a couple of reasons:

Mythological Naming Convention: During that time, it was a common practice to name celestial objects after mythological figures, particularly gods from Greek and Roman mythology. Bode suggested following this convention and recommended that Herschel choose a name from Greek mythology for the newly discovered planet.

Connection to the Sky: Uranus was chosen as the name for the planet because it was the name of the Greek god of the sky. Given that Herschel had discovered a celestial object in the sky, naming it after the god associated with the sky seemed fitting.

By naming the planet Uranus, Herschel paid homage to the mythological tradition of naming celestial bodies while also establishing a connection between his discovery and the vastness of the sky.

Hope this helps!

The major functions of the bones are body support, facilitation of movement, protection of internal organs, storage of minerals and fat, and hematopoiesis.

Explanation:

It protects your organs

allows movement

gives the body shape

it store minerals

Answer:

in my opinion..

Answer:

PE = 64 J

m = 8 kg

g = 1.6 m/s2

h = 5 m

Answer:

15m

Explanation:

Answer:

Acceleration occurs when an object changes its VELOCITY or DIRECTION or both

Explanation:

The most useful visual aid to represent the growth of different plants within same time duration is a bar graph. The vertical bars in the plot can effectively visualise the growth of each plant with respect to time.

A bar graph is a tool to visually represent and analyse the growth or progress in anything with respect to the time. It consist of two axis  x and y where, y  be the growth percentage and x axis is for the time at which the growth is measured.

Vertical bars are used to compare each component under study and each bar can given different colors to easily identify different components or samples under study.

Here, the four plants can be represented by four bars with different colors. The growth of each plant can be analysed then from the height of the vertical bars against the time duration at which the growth is measured.

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Answer:

The North Pole.

Explanation:

According to the Lenz's law of electromagnetic induction, an induced elemagnetic force tends to give rise to the current. In reaction, this current's magnetic field try to oppose any replacement in the magnetic flux.

So,  as per the law of Lenz's electromagnetic induction, when the current passes in a coil in anti-clockwise direction, this will produce the opposite end of the coil in the north pole.

So, the correct answer is north pole.

Answer:

atomic mass

Explanation:

the identify of the atom is determined by the number of protons

Answer:

He is also known for his discovery of the photoelectric effect, for which he won the Nobel Prize for Physics in 1921. Einstein developed a theory of special and general relativity, which helped to complicate and expand upon theories that had been put forth by Isaac Newton over 200 years prior.

answer :-He is also known for his discovery of the photoelectric effect, for which he won the Nobel Prize for Physics in 1921. Einstein developed a theory of special and general relativity, which helped to complicate and expand upon theories that had been put forth by Isaac Newton over 200 years prior.

12 × sin50 = 9.192533317........

The absorption of the waves allows to find examples for heating are:

Waves of all types carry energy, but not matter. Therefore when interacting with a material you can miss its energy.

They indicate that in this interaction the absorbed energy was transformed into thermal energy.

Case 1.

A wave of light falls on a glass of water in the sun after a while the temperature of the glass increases due to the absorption of light, this phenomenon increases if the glass is black.

Case 2.

A sound wave hits a wall if the frequency is close to resonance, the wave is absorbed and the wall can vibrate until it falls and incease your temperature.

When air is blown into a musical instrument, part of the wave energy is absorbed into the walls, which after a while heat up, this results in a change in the frequency of the sound emitted by the instruments.

In conclusion using the features absorption of waves we can find examples of heating are:

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For F(t) = 200 cos(10t) N, the steady-state response of the system is 0.05 m.For F(t) = 200 cos(20t) N, the steady-state response of the system is 0.10 m.

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Answer:

Suppose the micrometeoroid weighed 1 g = .001 kg

Suppose also the spacecraft were moving at 18,000 mph (1.5 hrs per rev)

Usually, the smaller particle would be moving but for simplicity suppose that it were stationary wrt the ground

v = 18000 miles / hr * 1500 m/mile / 3600 sec/hr = 7500 m/s

KE = 1/2 * .001 kg * (7500 m)^2 = 28,125 Joules

One can see that 28000 Joules could be damaging amount of energy

Yes, the statement is true. Mechanical waves require a medium to propagate from one point to another. When an external force is applied to a medium, it results in a wave that carries energy from one place to another.

Mechanical waves are of two types, longitudinal waves and transverse waves. Longitudinal waves are those in which particles of the medium move parallel to the direction of the wave. Transverse waves are those in which particles of the medium move perpendicular to the direction of the wave. Waves transfer energy, and mechanical waves require matter to propagate. For example, a sound wave travels through air and water, and an ocean wave travels through water. Mechanical waves cannot travel in a vacuum. They need a medium to propagate. When a wave travels through a medium, it disturbs the particles of the medium and transfers energy from one point to another. The medium does not transfer from one point to another; it only vibrates as the wave passes through it.

In conclusion, mechanical waves use matter to transfer energy. They require a medium to propagate and can travel only through matter. These waves transfer energy from one place to another without transporting the medium itself.

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Gas pressure is caused by gas molecules colliding with surfaces.

When gas molecules move and collide with the walls of a container, they exert a force on the walls, which causes the pressure of the gas in the container.

This is why gas pressure is often measured in units of force per unit area, such as pounds per square inch (psi) or pascals (Pa). While barometers can be used to measure gas pressure indirectly by measuring atmospheric pressure, the underlying cause of gas pressure is the collision of gas molecules with surfaces.

Thus, we can say that gas pressure is caused by gas molecules colliding with surfaces.

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Answer:

The answer is B extrapolation

The process of predicting values that extend beyond the range of data points is called extrapolation, so option B is correct.

Extrapolation is a method of estimating a variable's value outside the original observation range using the relationship between the variable and another variable.

Extrapolation is comparable to interpolation in that it yields estimates between known observations, but extrapolation is more imprecise and more likely to yield meaningless findings. If identical approaches are assumed to be applicable, extrapolation may also refer to the extension of a method.

Creating a tangent line at the end of the known data and extending it past that point is known as linear extrapolation. Only when utilized to extend the graph of a roughly linear function or not too far beyond the existing data will linear extrapolation yield good results.

Therefore, the process of predicting values that extend beyond the range of data points is called extrapolation.

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The smallest size conductor permitted by the NEC (National Electrical Code) for branch circuits, feeders, or services is 14 AWG copper or 12 AWG aluminium.

The smallest size conductor permitted by the NEC (National Electrical Code) for branch circuits, feeders, or services depends on the load that the conductor is expected to carry, as well as the material and type of insulation used in the conductor.

However, in general, for copper conductors, the minimum size permitted for branch circuits, feeders, or services is typically 14 AWG (American Wire Gauge), while for aluminum conductors, the minimum size is typically 12 AWG. It's important to note that these are minimum sizes, and the appropriate conductor size should be determined based on the specific application and load requirements, as specified by the NEC.

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PE=KE

mgh=1/2kx²

4.2 x 9.8 x h = 1/2 x 570 x (5.5)²

h = 209.45 m

2.75 m/s. Hope this helps.

The restoring force F of a spring is proportional to its displacement x from its equilibrium position. This law is called Hooke's law, and it can be written mathematically as follows:

F = − kx

where k is the spring constant

The period of motion can be determined by the following formula:

T=2π\(\sqrt{\frac{m}{k} }\)

where, m = the mask = spring constant

Let the amplitude of motion be A. The total energy of a mass attached to a spring is given by:

E=\(\frac{1}{2}\)k\(A^2\)

The maximum kinetic energy of the mass is given by

K = \(\frac{1}{2}\)m\(v^2\)

The maximum potential energy is given by

U = \(\frac{1}{2}\)k\((A + x_0)^2\)

where \(x_0\) is the displacement of the mass from the equilibrium position when it is released from a point 8 inches above the equilibrium position with an upward velocity of 5 ft/s. The maximum potential energy is equal to the maximum kinetic energy.

Equating the two, we have:

\(\frac{1}{2}\)m\(v^2\) = \(\frac{1}{2}\)k\((A + x_0)^2\) ⇒ A + \(x_0\) = \(\sqrt{\frac{mv^2}{k} }\)

Using this value of A + \(x_0\), we can determine the amplitude of motion as follows:

A = \(\sqrt{\frac{mv^2}{k} }\) − \(x_0\)

The mass in pounds can be converted to slugs as follows: \(m = \frac{54}{32.2} = 1.68\) slugs.

The displacement x of the spring from its equilibrium position can be determined as follows: \(x = \frac{3.84}{12} = 0.32\) ft.

The spring constant k can be determined using the formula:

\(k=\frac{k}{x}\)

where F is the force exerted on the spring when it is stretched by the mass.

The force F can be determined using the formula: F = m * g where g is the acceleration due to gravity.

Substituting the values, we get: F = 1.68 * 32.2 = 54.1 lbf

Substituting these values into the formula for k, we get \(k =\frac{54.1}{0.32} = 169.0\) lbf/ft.

The period of motion can be determined using the formula: T = 2π\(\sqrt{\frac{m}{k} }\).

Substituting the values, we get: T = 2π\(\sqrt \frac{1.68}{169.0}\) = 0.504 s.

Using the value of \(x_0\), we can determine the amplitude of motion as follows: A = \(\sqrt{\frac{mv^2}{k} }\)  − \(x_0\).

Substituting the values, we get: A = \(\sqrt{ \frac{1.68*\frac{25}{9} }{169.0}} - 0.67A\)= 0.062 ft or 0.74 .

When a mass is hung on a spring, it extends from its original length to a new length. This change in length is known as the displacement. The point where the mass hangs without moving up or down is known as the equilibrium position. The restoring force, which is proportional to the displacement from the equilibrium position, acts on the mass when it is displaced from its equilibrium position. This law is known as Hooke's law. The constant of proportionality is known as the spring constant. The period of motion of the mass attached to the spring can be determined using the formula T = 2π\(\sqrt{\frac{m}{k} }\), where m is the mass and k is the spring constant. The amplitude of motion is the maximum displacement of the mass from its equilibrium position.

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The resultant force to two significant figures is F = 3.6 kN.

The direction is 9.6º to the North - East.

X-axis

         F₁ = 2.50 kN

Tide

        cos 30 = F₂ₓ / F₂

        sin 30 = F_{2y} / F₂

         F₂ₓ = F₂ cos 30

        F_{2y} = F₂ sin 30

        F₂ₓ = 1.20cos 30 = 1.039 kN

        F_{2y} = 1.20 sin 30 = 0.600 kN

the resultant force is

X-axis

       Fₓ = F₁ₓ + F₂ₓ

       Fₓ = 2.50 +1.039

       Fₓ = 3,539 kN

       F_y = F_{2y}

       F_y = 0.600

To find the vector, we use the Pythagorean theorem:

\(F=\sqrt{F_{x} ^{2} } {F_{x} ^{2}}\)

\(F=\sqrt{3.539^{2}+0.600^{2} }\)

F = 3,589 kN

        tan θ = F_y / Fₓ

        θ = tan⁻¹

        θ = tan⁻¹  0.6 / 3.539

        θ = 9.6º

Therefore,

The resultant force to two significant figures is F = 3.6 kN

The direction is 9.6º to the North - East

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Ballistic stretching works muscles through a variety of motions to increase flexibility. Ballistic stretching before exercise prepares the muscles for high-impact action. Consequently.

Ballistic Method It is the oldest technique for stretching exercises. This strategy employs quick movements. A joint or even a muscle can be stretched with only repetitive motions or activities around it. It is essential to warm up properly before beginning such a workout.

Ballistic stretching uses the velocity of a moving person or limb to push an object outside its inherent range of motion. You are "starting to warm up" or stretched by jumping into an extended posture and using your stretched muscles like a springtime to pull yourself out of it.

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Answer:

The first reason for children to have pretend play is that it allows the child to learn how to interact socially. The child is able to take turns, share responsibility, develop how people feel and react the situation. Another reason is that it helps the child develop their critical thinking skills. They may have to creatively solve a problem, or think what they may need in real life for the pretend play. It increases the child's ability to think through those types of situations. The final reason it is important for a child to have pretend play is that it helps develop their language skills. If the child is imitating a dad, mom, teacher, etc. they will attempt to use the same language that person uses. This helps the child connect new language abilities and skills.

Explanation:

Answer:

The top 3 reasons for encouraging children to pretend play and make-believe include:

1. To encourage imagination and creativity.

2. To support social and emotional development.

3. To improve language and communication skills.

When a volleyball is tossed over a net, starting from a height of 1.5 meters above the ground, where  after reaching the top of its trajectory it returns to its original height as it falls, the ball's speed is the same as when it was tossed, but its velocity is different.

As ball 1 gets to the top of its trajectory, its velocity becomes zero.

since not stated otherwise, we assume that both balls have the same properties

If ball 2 is released at this instance, then they both will travel down at the same time interval and have initial velocity as zero.

since vertical travel is downwards, then acceleration due to gravity g is positive for both balls.

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