Who headed up the football association?
O President Obama
O Lionel Messi
Ebenezer Cobb Morley
O Dominic Mane

According to given question the speed of the arrow as it leaves the bow is 41.32m/sec.

The definition of force in physics is: This push or draw on a massed object changes its velocity. An unseen factor is an agency that has the power to alter the resting or movement condition of a body. It has both a trajectory and a size.

There are several instances of energies in daily life, including: heft and drive (i.e. the weight of something) is force a swing applies to a ball. the pressure that a hair applies to hairs when stroking it. the pressure your foot applies to the pedal whenever you're riding your bike.

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Loudness increases by 10 dB for every dB increase in sound intensity. A 40-decibel light rainstorm is 100 times louder than a whisper, whereas a 30-decibel "silent" room is 10 times louder than a 20-decibel whisper. Loud noises can be harmful.

A 10 dB rise results in a two-fold increase in volume. The loudness will therefore rise by nearly 8 times with a 30 dB increase (from 20 dB to 50 dB).

Decibels are measured on a logarithmic scale using a power of ten, which might be perplexing. For those of you without advanced math degrees, this simply implies that the sound intensity doubles for every 10 decibel rise.

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Answer:

Weightlessness is simply a sensation experienced by an individual when there are no external objects touching one's body and exerting a push or pull upon it.

Answer:

Weightlessness is simply a sensation experienced by an individual when there are no external objects touching one's body and exerting a push or pull upon it. ... When in free fall, the only force acting upon your body is the force of gravity - a non-contact force.

I don't know sorry didn't make me want you say you didn't know how I feel about me being that way and that I didn't even want you say I was wrong and you didn't want me to be to have a good time

The total distance the ball has traveled at the moment of the nth bounce can be calculated using the sum of a geometric series formula of dₙ = h(1 - rₙ) / (1 - r).

Let's assume the initial height of the ball is h. After the first bounce, the ball reaches a height of rh. Following each subsequent bounce, the ball's height can be calculated using the formula:

hₙ = rhₙ₋₁

where hₙ represents the height after the nth bounce.

To find the total distance traveled at the moment of the nth bounce, we can use the sum of a geometric series formula:

dₙ = h(1 + r + r² + ... + rₙ₋₁)

where dₙ represents the total distance traveled after the nth bounce.

The sum of a geometric series formula can be expressed as:

dₙ = h(1 - rₙ) / (1 - r)

Thus, the total distance traveled by the ball at the moment of the nth bounce can be calculated using this formula.

It's important to note that the above calculations assume that there is no external force acting on the ball during its motion and that there is no loss of energy during each bounce.

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If a sea slug repeatedly receives an electric shock just after being squirted with water, its withdrawal response to a squirt of water grows stronger. this best illustrates associative learning.

Associative learning is the process of learning how two different stimuli are related to one another. The stimuli can be anything from real things and occurrences to more abstract ideas like time, place, context, or categories. 2020 edition of the Handbook of Clinical Neurology.

This idea comes from psychology. Examples of associative learning include the following: If a person burns himself after touching a hot stove, they may come to link hot stoves with pain and become conditioned to avoid touching them.

Conditioning, which holds that behavior can be changed or learnt depending on a stimulus and a response, is a type of learning that uses associations. According on the reaction it elicits, behavior can thus be learnt or unlearned.

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Momentum is conserved, so

(30,000 kg) (15 m/s) + (45,000 kg) (5 m/s) = (30,000 kg + 45,000 kg) v

where v is the speed of the coupled trains.

Solve for v :

450,000 kg•m/s + 225,000 kg•m/s = (75,000 kg) v

675,000 kg•m/s = (75,000 kg) v

75v = 675 m/s

v = 9 m/s

Answer:

the answers is 1.

Explanation:

this is because heat always travel's from the warmest object to the coldest. His hands thermal energy is transferred to the ice making the ice round to the same temperature of his hand. This can also be an example of equalibrum.

Answer:

80 Percent

Explanation:

E=energy output/energy input×100

E=8000/10000×100

E=0.8×100

E=80 percent.

Mark brianliest if my answer suit your question

If the machine put, in 8000 J, and the user puts 10,000 J of work then the efficiency of the machine will be equal to 80%.

Work is a physics term used to describe the transfer of energy that takes place when an object changes above a distance because of an external force, at least some of which is given in the vector of the dislocation. The element of the force acting all along the path multiplied by the length of the path can be used to calculate work if the force is constant.

Mathematically, this idea is expressed as W = fd, where W is the effort and f is the force multiplied by d, the distance. Work is completed whenever the force is applied at an angle with about the displacement.

As per the data provided in the question,

Total input energy = 10,000 J

Total output energy = 8,000 J

Then, the efficiency (η) of the machine will be,

η = (output energy/input energy) × 100

η = 8000/10000 × 100

η = 80%.

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The wavelength will be longer, increasing the diffraction angle.

The separation between two successive wave crests or troughs is known as a wavelength.

Here are some wavelength illustrations: Yellow Light, for instance. All visible light has a wavelength between 400 and 700 nanometers (nm).

Radio waves, light waves, and infrared (heat) waves are examples of electromagnetic radiation that flow through space in distinct patterns.

The symbol for the wavelength in the SI is often the letter m. Additionally, multiples or fractions of a metre are employed when calculating wavelength. The use of exponential powers of 10 is noteworthy when wavelengths are a significant feature.

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Answer:

Simple Response: The diffraction angle of the waves is approximately equal to the wavelength divided by the gap width. Therefore, increasing the wavelength will increase the diffraction angle.

Explanation:

Vectors are not added algebraically, but rather geometrically. Two vectors whose product must be determined act differently from one another.

The result of the three vectors will be zero if the criteria listed below hold. If the third vector's direction exactly opposes that of the resultant of those first two vectors. 3. If the third vector has a magnitude exactly equal to the resultant of the first two vectors.

Finding the sum of several vectors acting on a body is what vector addition is all about. Commutative vector addition. This implies that the order of the vectors has no bearing on the final vector.

Therefore, The outcome is the result of adding two vectors. Here, we see that the magnitude and direction of the two vectors are identical. Two vectors are parallel to one another if their magnitude and direction are distinct from one another.

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Vectors are not added algebraically, but rather geometrically. Two vectors whose product must be determined act differently from one another.

The result of the three vectors will be zero if the criteria listed below hold. If the third vector's direction exactly opposes that of the resultant of those first two vectors. 3. If the third vector has a magnitude exactly equal to the resultant of the first two vectors.

Finding the sum of several vectors acting on a body is what vector addition is all about. Commutative vector addition. This implies that the order of the vectors has no bearing on the final vector.

Therefore, The outcome is the result of adding two vectors. Here, we see that the magnitude and direction of the two vectors are identical. Two vectors are parallel to one another if their magnitude and direction are distinct from one another.

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Answer:

Objects in orbit around the Earth (like a satellite) still have net forces acting on them. True; An object with no net forces acting on it would not have a change in velocity. ... Therefore, there must be a net force acting on it.

Explanation:

Objects  in orbit around the Earth (like satellites) still have net forces acting on them. This is true, because this net force make change in their motion.

Force is an external force acting on object to change its state of motion or rest or to deform it. There are various kinds of forces such as gravitational force, magnetic force, nuclear force etc. Force is a vector quantity having both magnitude and direction.

The net force acting on a body depends on the direction and magnitude of all the forces acting on the object. The force acting on the objects that are orbiting around earth includes the gravitational force by earth, as well the force by other nearby planets or spatial objects etc.

Not all these force gets balanced and a net force always be there acting on these objects make them undergo changes in their state of motion.

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Answer:

d = 27.03 m

Explanation:

Constant Speed Motion

An object travels at constant speed if the ratio of the distance traveled by the time taken is constant.

Expressed in a simple equation, we have:

\(\displaystyle v=\frac{d}{t}\)

Where  

v = Speed of the object

d = Distance traveled

t = Time taken to travel d.

From the equation above, we can solve for d:

d = v . t

It's required to find the distance traveled by someone walking at v=1.7 m/s for t=15.9 s. Substituting in the last equation:

d = 1.7 m/s * 15.9 s

d = 27.03 m

By Bernoulli's Principle :

\(P_x+\dfrac{\rho v_x^2}{2}+\rho gz_x=P_y+\dfrac{\rho v_y^2}{2}+\rho gz_y\)

Since , pipe is horizontal so every point is at same height .

So , \(z_x=z_y\) .

The equation will reduced to :

\(P_x+\dfrac{\rho v_x^2}{2}=P_y+\dfrac{\rho v_y^2}{2}\)    ..... 1 )

Also flow rate will be constant :

\(Q=A_xv_x=A_yv_y\)

\(v_x=\dfrac{Q}{A_x}\\\\v_x=\dfrac{2.4\times 10^{-4}}{3\times 10^{-4}}\ m/s\\\\v_x=0.8\ m/s\)

\(v_y=\dfrac{Q}{A_y}\\\\v_y=\dfrac{2.4\times 10^{-4}}{0.6\times 10^{-4}}\ m/s\\\\v_x=4\ m/s\)

Now ,

\(P_x-P_y=\dfrac{\rho v_y^2}{2}-\dfrac{\rho v_x^2}{2}\\\\P_x-P_y=\rho[\dfrac{ v_y^2}{2}-\dfrac{v_x^2}{2}]\\\\P_x-P_y=1000\times [\dfrac{ 4^2}{2}-\dfrac{0.8^2}{2}]\\\\P_x-P_y=7680\ Pa\)

Difference in pressure between X and Y is most near to 7700 Pa.

Hence, this is the required solution.

If the question is asking for acceleration,

To find acceleration, we have to find the change in velocity over the change in time

In this case, the change of velocity is -30 km/hr and the change in time is 5 seconds

We must convert the units of sec to hours to solve this question

5 sec * 1 min/60 seconds * 1 hour/60 min = .00138889 hours

acceleration = change in velocity / change in time = -30 km/hr / .00138889 hours = -21599.999 km/hr^2 = ~-21600 km/hr^2

The solar neutrino issue had two solutions put forth. The nuclear reactions that produced neutrinos within the Sun were misinterpreted in the original solution. Neutrinos actually have a modest mass in the second.

Neutrinos are elementary particles of matter. They were formerly thought to have no mass and no electric charge. Neutrinos have very weak interactions with matter, which makes it incredibly challenging to find them. So weakly that millions of neutrinos are flowing through your body while you read this page without interacting in any major way. They come in three different varieties: Tau neutrinos, Muon neutrinos, and electron neutrinos.

To make the detector more sensitive to neutral-current reactions, the SNO team have added some of the world's purest salt to the heavy water in the detector. Large chlorine-35 nuclei in salt cause more collisions, which in turn produces more gamma rays.

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a) Sketch the plate shape: we get a shape that resembles a trapezoid.

The plate shape is determined by the lines y = 2 - x² and y = 2x - 1. To sketch the plate shape, we can plot these two lines and shade the region in between them. The intersection points of the lines are found by solving the equations simultaneously:

2 - x² = 2x - 1

Simplifying, we get:

x² + 2x - 3 = 0

Factoring, we have:

(x - 1)(x + 3) = 0

So, x = 1 and x = -3. Plugging these values into the equations of the lines, we find the corresponding y-values:

For x = 1:

y = 2 - (1)² = 1

For x = -3:

y = 2(-3) - 1 = -7

Plotting these points and connecting them with the lines, we get a shape that resembles a trapezoid.

b) Total charge through the double integral:

To find the total charge Q, we need to integrate the charge density p(x, y) over the entire plate. We can express this as a double integral:

Q = ∬ p(x, y) dA

c) Reducing the double integral to repeated integrals: The limits of integration for x are the values of x that define the boundaries of the plate shape, which are -3 to 1.

Since the plate shape is described by the lines y = 2 - x² and y = 2x - 1, we can rewrite the double integral as a repeated integral by integrating with respect to x and y separately:

Q = ∫∫ p(x, y) dy dx

The limits of integration for y are from the lower curve y = 2 - x² to the upper curve y = 2x - 1. The limits of integration for x are the values of x that define the boundaries of the plate shape, which are -3 to 1.

d) Calculating the integral: The total charge Q of the thin plate is approximately 12.4 mC.

Now, we can evaluate the double integral to find the total charge Q:

Q = ∫(-3 to 1) ∫(2 - x² to 2x - 1) x²y dy dx

Performing the inner integral with respect to y first, we get:

Q = ∫(-3 to 1) [x²(y²/2 - y)] from 2 - x² to 2x - 1 dx

Simplifying the inner integral, we have:

Q = ∫(-3 to 1) [(x²/2)(2 - x²) - x²(2x - 1)] dx

Expanding and simplifying further, we get:

Q = ∫(-3 to 1) (x² - x⁴/2 - 4x³ + 2x²) dx

Integrating term by term, we have:

Q = [x³/3 - x⁵/10 - x⁴ + 2x³/3] from -3 to 1

Evaluating the integral at the limits, we get:

Q ≈ 12.4 mC (rounded to five significant figures)

Therefore, the total charge Q of the thin plate is approximately 12.4 mC.

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Diffraction is the change in a wave's direction as it travels around barriers. Diffraction is observed in both light and sound waves. This means that options 1 and 2 are wrong.

For any opening or slit, waves with longer wavelengths bend more than waves with shorter wavelengths. If the wavelength is smaller than the opening, it would be difficult for diffraction to occur. Thus, the correct option is

It occurs best when the slit width is less than the wavelength of a wave.

Answer:

1)The connection should be tight.

2)The wire should be connected at the terminals not in between.

3)clean the ends of the wire by sandpaper.

4)Take the voltmeter and ammeter in proper range.

5)The rheostat should be used of low resistant(about 100).

The horizontal distance that the cannonball will travel is 383.33m

In order to find the horizontal distance, we will use the formula for calculating the range expressed as:

\(R = u\sqrt{\frac{2H}{g} }\) where:

u is the velocity

H is the height

g is the acceleration due to gravity

\(R = 120\sqrt{\frac{2(50)}{9.8} }\\R = 120\sqrt{\frac{100}{9.8} } \\R=120\times 3.1943\\R=383.33m\)

Hence the horizontal distance that the cannonball will travel is 383.33m

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The final gravitational force will be 1/16th of the initial gravitational force. In other words, the gravitational force will decrease when the objects are moved from 1 meter apart to 4 meters apart.

The gravitational force between two objects depends on their masses and the distance between them. According to Newton's law of universal gravitation, the force is inversely proportional to the square of the distance between the objects and directly proportional to the product of their masses.

Let's assume that the masses of the objects remain constant. If the objects are initially placed 1 meter apart and then moved to a distance of 4 meters, we can calculate how the gravitational force changes.

The formula for the gravitational force is:

F = G * (m1 * m2) / r^2

Where:

F is the gravitational force between the objects.

G is the gravitational constant.

m1 and m2 are the masses of the objects.

r is the distance between the objects.

Assuming the masses and the gravitational constant remain constant, we can compare the initial and final gravitational forces.

Let's denote the initial force as F_initial and the final force as F_final. Using the formula above, we can calculate the ratio of the final force to the initial force:

F_final / F_initial = (G * (m1 * m2) / (4^2)) / (G * (m1 * m2) / (1^2))

                    = (1 / 16) / (1 / 1)

                    = 1 / 16

This decrease in the gravitational force is a result of the inverse square law. As the distance between the objects increases, the force weakens exponentially. In this case, the force decreases by a factor of 16 because the distance is quadrupled (from 1 meter to 4 meters).

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The probable question may be:

2 objects are initially placed 1 meter apart. By how much will the gravitational force between the objects change if they are moved to 4 meter apart? Explain and state whether it will increase of decrease.

Answer:

Explanation:

When you put another light bulb in parallel with the other two, you are not going to get something for nothing. The current drain on the battery has to go up.

Let the lightbulbs have a a resistance of r. Two light bulbs with make the resistance go to 1/2 r. The lower the resistance, the more the current. When you put the third light bulb in, the resistance will go to 1/3 r.  So the current goes up.

If you put another resistor in series with x, the resistance adds. The total series resistance is 2x. The current reading will go down. The higher the resistance the lower the current.

The momentum of the bumper car after the collision is 1,040 kgm/s.

The change in momentum of the bumper is calculated as follows;

P = v(m1 + m2)

P = 8(55 + 75)

P = 1,040 kgm/s

The momentum of the bumper car after the collision is 1,040 kgm/s.

The direction is still the same.

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A joint that allows movements in many directions around a central point is known as a ball-and-socket joint.

This type of joint is formed by a ball-shaped surface of one bone fitting into a cup-like depression of another bone. The ball-and-socket joint allows movement in all directions, including flexion, extension, abduction, adduction, and rotation. Examples of ball-and-socket joints in the human body include the hip joint and the shoulder joint. The hip joint connects the thigh bone (femur) to the pelvic bone and is responsible for supporting the weight of the upper body and enabling a wide range of movements, such as walking, running, and jumping. The shoulder joint, also known as the glenohumeral joint, connects the upper arm bone (humerus) to the shoulder blade (scapula) and allows movements such as lifting the arm above the head, reaching behind the back, and rotating the arm.

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The velocity of the bowling ball after falling for 3.0 seconds is approximately 29.4 m/s.

To determine the velocity of the bowling ball after falling for 3.0 seconds, we can use the kinematic equation for free fall:

v = gt

where:

v is the final velocity,

g is the gravitational acceleration (9.8 m/\(s^{2}\)),

t is the time of fall (3.0 seconds).

Plugging in the values, we get:

v = (9.8 m/\(s^{2}\)) * (3.0 s)

v = 29.4 m/s

Therefore, the velocity of the bowling ball after falling for 3.0 seconds is approximately 29.4 m/s.

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Answer:

B. silicate rocks and metals

Terrestrial planets, such as Earth, are primarily composed of silicate rocks and metals. The correct answer is b. silicate rocks and metals.

Silicate rocks, which are made up of silicon and oxygen, are the dominant building blocks of these planets. They include minerals like quartz, feldspar, and mica. Terrestrial planets contain significant amounts of metals such as iron, nickel, and other heavy elements. These metals are found in the planet's core, providing structural strength and contributing to the planet's magnetic field.

This composition differentiates terrestrial planets from gas giants like Jupiter and Saturn, which are predominantly composed of hydrogen and helium. The combination of silicate rocks and metals forms the solid, rocky surfaces that characterize terrestrial planets.

Therefore, The correct answer is b. silicate rocks and metals.

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Explanation:

Gas pedal is not required to used on friction less surface. On a friction less surface once the car is started and caused to move, car continues to move with same velocity as there is no opposing force. Therefore, no pressing of gas pedal required. However, this situation is not possible in real life, as friction is always present.

Answer:

Explanation:

actually , the acceleration due to gravity depends on the distance from it's center of the earth.

when the distance from the earth increases , the acceleration due to gravity decreases as a result . The value of gravity in space is zero.