A 2 kg ball is thrown upward with an initial speed of 12 m/s. after rising a vertical distance of 3.0 meters, the ball is moving upwards at only 5 m/s. determine the average force the ball experiences from air resistance during this time.

Sports biometrics are qualitative measurements. The skills that are MOST important for those who want to go into this field are physical health and coordination, therefore the correct answer is option A.

Exercise is the activity that includes the physical movements of the body and results in fitness, wellness, and healthiness of the person to protect and lower the risks of getting diseases. It allows the person to maintain a healthy weight.

Qualitative assessments are used in sports biometrics. Physical fitness and coordination are the two abilities that are MOST crucial for people who desire to work in this sector.

Thus, the most appropriate answer to the given problem is option A.

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Answer: A- physical help and coorelation

Explanation: I have this quiz

The coefficient of magnetic field was found to be Bmax, k = 1.53x10¹¹, 1.14x10⁴,3.43x10¹² T,1/m,rad/s.

Moving charges, wave action, and magnetic materials all experience the magnetic influence of a magnetic field, which is a vector field. A force perpendicular to the charge's own velocity and the magnetization is applied to it when it moves through a magnetic field. A permanent magnet's magnetic field draws on ferromagnetic materials like iron and repels or attracts other magnets. The three additional magnetic effects of diamagnetism, electromagnetism, and biomagnetism also cause tiny forces to be exerted on "nonmagnetic" materials by a nonuniform magnetic field, although these forces are frequently so minute , they can only be detected using laboratory apparatus. Electric currents used in electromagnets and time-varying electric fields produce magnetic fields that surround magnetized objects.

Magnetic field maximum = 1.531011,

The wave number is 1.14104.

In teslas, the angular frequency is 3.431012 T.

meters-1 in reverse,

rad/s = radians per second

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Dont know the answer but have a good day :)

The trait of a wave that is described by its wavelength is the spatial extent of the wave.

Wavelength is defined as the distance between two consecutive points of a wave that are in phase, or the distance between two corresponding points on adjacent cycles of a wave. It is typically measured from crest to crest or trough to trough of a wave.

Wavelength is an important characteristic of a wave and is typically denoted by the Greek letter lambda (λ). It is used to describe various types of waves, including electromagnetic waves (such as light waves) and mechanical waves (such as sound waves).

In general, waves with longer wavelengths have lower frequencies and carry less energy per unit length. Conversely, waves with shorter wavelengths have higher frequencies and carry more energy per unit length.

For example, in the case of electromagnetic waves, different regions of the electromagnetic spectrum have different wavelengths. Radio waves have longer wavelengths, while visible light waves have intermediate wavelengths, and X-rays or gamma rays have shorter wavelengths.

In the context of sound waves, wavelength determines the pitch of the sound. Longer wavelengths correspond to lower-pitched sounds, while shorter wavelengths correspond to higher-pitched sounds.

In summary, the wavelength of a wave describes its spatial extent, representing the distance between two consecutive points or cycles of the wave. It is a fundamental characteristic of waves and is associated with properties such as frequency, energy, and pitch, depending on the type of wave being considered.

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The law of conservation of energy states that energy is always conserved, and cannot be destroyed.

At the top of the hill, the ball is at the maximum height. Because the equation for gravitational potential energy is (\(U_{g}\) = mgH), we can safely conclude that the GPE at A, the top of the hill, is the greatest in all 4 options.

Now, what about Kinetic Energy? Recall the law of conservation of energy. At the point where Gravitational Potential Energy is the lowest, Kinetic Energy will be the highest. Total energy is always conserved, and so it is logical that KE will increase to compensate for GPE decreasing. Therefore, we know that at point C, the ball will have the greatest Kinetic Energy. Because this point is the lowest point in the hill, the ball will have the lowest possible GPE and therefore the largest possible KE out of the 4 options.

4. A

5. C

If you're still confused or would like me to explain this further, just ask!

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Developing Psychological Theories: Mastery Test

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Hope this helps :)

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Answer:

F = 18.9 N

Explanation:

m = 0145 kg

a = 130 m^2

F = ma = (0.145kg)(130m/s^2) = 18.9N

Which terms describe the purpose of antennas on devices that use radio waves?

Answer:

Explanation:

Hope it helps:)

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Answer:

Transmit and receive (A)

Explanation:

On Edge

Answer:

The speed of sound in water is two times slower than that in air. Sound travels much faster in space than in water. Warmer water allows sound to travel faster so i think true

Explanation:

Answer:.50

Explanation:

Answer:

D. All lunar eclipses reoccur.

Explanation:

Every Saros cycle (19 eclipse years)

Saro was described by Edmond Halley arround the year 1691, which is a period of 223 synodic which can be interepreted as "repitition" it is used by the scientist for eclipse prediction either for the sun or moon eclipse. It is 18years and 11days and some hours.

It should be noted that with this All lunar eclipses reoccur.

A micrometer is used to measure the diameter of a length of copper wire. The zero error and scale reading are as shown.The correct answer should be the micrometer.

The micrometer is an instrument that is capable of measuring the component of an object to very high precision. It is used to obtain accurate measurements in engineering.

In the case of the copper wire, the diameter of 0.3 mm was an approximation and a more accurate measure of the diameter would be obtained by using the micrometer.A micrometer is used to measure the diameter of a length of copper wire. The zero error and scale reading are as shown.The correct answer should be the micrometer.

Therefore, A micrometer is used to measure the diameter of a length of copper wire. The zero error and scale reading are as shown.The correct answer should be the micrometer.

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Explanation:

On a position vs time graph (x vs t), displacement is the difference in positions (Δx = x₂ − x₁).

On a velocity vs time graph (v vs t), displacement is the area under the graph (Δx = ∫ v dt).

According to the question 3 inches is equal to 7.62 centimeters.

Centimeters (cm) are a unit of length in the metric system, equal to one-hundredth of a meter. In the English system of measurement, they are equivalent to 0.3937 inches. Centimeters are most commonly used in measuring shorter distances, such as the length of an object or the height of a person. They are also used to measure the size of a room or the dimensions of a package. Centimeters are the preferred unit of measure for most scientific fields, including physics, engineering, astronomy, and meteorology.

3 inches is equal to 7.62 centimeters. This is because 1 inch is equal to 2.54 centimeters, so 3 inches can be calculated by multiplying 2.54 by 3, which results in 7.62 centimeters.

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it's not necessary for a charged body actually to touch the ball of the electroscope for the leaves to diverge. When you touch the charged object with the ball, some electrons flow from the body to the ball and you can observe a deflection in the electroscope

An early scientific tool used to identify the presence of electric charge on a body is the electroscope. Due to the Coulomb electrostatic force acting on a test object, it can detect charge by the movement of the object. A substance's charge is proportional to its voltage.

The presence of an electric charge on a body can be found using a scientific tool called an electroscope. The versorium was the first electroscope with a pivoting needle, created in 1600 by British physician William Gilbert.

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Answer:

19.6N

Explanation:

we use the formula weight= mass × gravity

thus we say weight= 2 × 9.8

which equals 19.6N

If rear toe is uneven, the vehicle will pull to the side with the more positive (or less negative) toe-in. Toe-in refers to the angle at which the wheels are tilted inward from a vertical line when viewed from above. This angle can affect the way the tires make contact with the road, which in turn can cause the vehicle to pull to one side or the other.

When rear toe is uneven, it means that one wheel is tilted at a different angle than the other. If one wheel has a more positive toe-in angle (meaning it is tilted inward at a greater angle), it will create more resistance and drag on that side of the vehicle, causing it to pull toward that side. This can be especially noticeable at higher speeds, where small imbalances can have a greater effect on handling and stability.

To fix this issue, the toe angle on both rear wheels needs to be adjusted so that they are equal and within the manufacturer's recommended specifications. A professional mechanic can perform this adjustment using specialized tools and equipment to ensure that the vehicle is properly aligned and driving straight.

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By the definition of wavelength, the answer is the letter D, the wavelength would decrease.

We can see in the diagram a wave motion.

A wave has some characteristics:

Now, if we increase the distance of the crests, by the definition shown above, we will increase the wavelength.

Therefore, the answer is letter D, the wavelength would increase.

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The strain that is completely recovered when the tensile stress on an object is removed is called "Elastic Strain" or "Elastic Recovery."

When an object is subjected to tensile stress, it undergoes deformation, resulting in strain. This strain represents the change in length or shape of the object relative to its original state.

When the tensile stress is removed, the object has the ability to recover its original shape and dimensions. The strain that is completely recovered during this process is referred to as "Elastic Strain" or "Elastic Recovery."

Elastic strain occurs in materials that exhibit elastic behavior, meaning they can deform under stress but return to their original shape once the stress is removed. This behavior is attributed to the interatomic or intermolecular forces within the material, which enable it to store elastic energy when deformed and release it upon stress removal.

The extent of elastic strain and recovery depends on the material's mechanical properties, such as its elasticity and yield strength. Different materials have different elastic limits, beyond which permanent deformation (plastic deformation) occurs. Within the elastic limit, the strain is fully recovered, and the object returns to its original state without any permanent deformation.

Elastic strain and recovery are fundamental concepts in the study of material behavior under stress. They play a crucial role in various fields, including engineering, materials science, and mechanics, as they govern the performance and durability of materials and structures.

Therefore, the strain that is completely recovered when the tensile stress on an object is removed is called "Elastic Strain" or "Elastic Recovery."

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Given that,

Distance = 60 km

Time = 45 min

To find,

The average speed of the car.

Solution,

Average speed of an object is equal to the total distance divided by total time taken.

45 min = 0.75 hour

It can be given as :

\(V=\dfrac{60\ km}{0.75\ h}\\\\=80\ km/h\)

Therefore, the average speed of the car is 80 km/hr.

Venn diagram B is correct. A Venn diagram is a type of graph that uses circles to depict connections between objects or fixed groups of entities.

A Venn diagram is a diagram that uses circles to depict relationships between objects or finite groups of objects. Circles that overlap share characteristics, whereas circles that do not overlap do not.

A Venn diagram with two intersecting circles. the circle on the left is labeled transverse waves with entries light, can travel through a vacuum, vibrating string and medium motion is perpendicular.

The circle on the right is labeled longitudinal waves with entries medium motion is parallel, has regions of high and low density, sound and travel faster in a denser medium.

The overlapping region has entries, created by a disturbance, has speed, and travels through solids.

Hence Venn diagram B is correct

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According to Newton's third rule of motion, whenever a first object applies a force to a second object, the first object feels a force that is both equal to and opposite from the force that it applies.

What is Force?

In physics, a force is an influence that can change the motion of an object. A force can cause a mass object's velocity or acceleration to change. Force can be described intuitively as a push or a pull. Because it has both magnitude and direction, a force is a vector quantity.

To find the work done by friction over the full length of the roller coaster, you will need to calculate the force of friction acting on the marble over the entire track. The force of friction can be calculated using the formula: F = μ * N, where μ is the coefficient of kinetic friction and N is the normal force. Once you have calculated the force of friction, you can then calculate the work done by multiplying the force of friction by the distance travelled. The formula for work is W = F * d, where F is the force of friction and d is the distance travelled.

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The velocity of the motorcycle with respect to the passenger in the car is determined as 20 mi/hr.

The velocity of the motorcycle is determined by applying the principle of relative velocity.

The relative velocity is defined as the velocity of an object with respect to another observer.

A frame of reference is defined as the reference point or chosen base point in which a measurement is taken.

The relative velocity of the motorcycle is calculated by choosing an observer in the car as the frame of reference.

Mathematically, this formula is given as;

Vr = Vm - Vc

where;

Vr = 80 mi/hr  -  60 mi/hr

Vr = 20 mi/hr

Thus, the relative speed of the motorcycle is a function of the speed of the car and the speed of the motorcycle.

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Answer:

Gamma radiation .

Explanation:

Three types of emission result at the time of nuclear emission .

alpha emission

Beta emission

Gamma radiation emission

Gamma radiation results in the emission of gamma ray . This is a very high frequency radiation . It is not a particle having charge and mass like alpha and beta emission . So it has no effect on the mass and charge of the product that is formed after gamma radiation . The only effect it has on the product is that it reduces the kinetic energy of the emitting particles or it reduces the internal energy of the product . It causes negligible change in the mass of the product and no change in the charge of the product.

That is why , generally this product is not written in the nuclear reaction .

Answer:

The answer is Gamma ray

Explanation:

Because this is a very high frequency radiation, is not a particle having charge and mass like alpha and beta emission, so it has no effect on the mass and charge of the product that is formed after gamma radiation. The only effect it has on the product is that it reduces the kinetic energy of the emitting particles or it reduces the internal energy of the product, it causes negligible change in the mass of the product and no change in the charge of the product.

Answer:

3 meters

Explanation:

Velocity = displacement/time

Displacement=velocity×time

As, time from 7 to 8 is 1 sec. And velocity increases from 0 to 3 m/s

So, Displacement = 3×1

=3m

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Answer:

P = 800 Pa

Explanation:

The pressure of water at the bottom of the pot can be given by the following formula:

\(P = \rho g h\)

where,

P = Pressure at the bottom of the pot = ?

ρ = density = 1000 kg/m³

h = height of water = 8 cm = 0.08 m

Therefore,

\(P = (1000\ kg/m^3)(10\ m/s^2)(0.08\ m)\)

P = 800 Pa

Remember to use colons to introduce a list, a quote, or an explanation, and semicolons to separate closely related independent clauses or items in a list with internal punctuation.

1. Incorrect: I have a few favorite foods; pizza, sushi, and pasta.
  Correct: I have a few favorite foods: pizza, sushi, and pasta.

In this example, a colon is used to introduce a list.

2. Incorrect: She has three hobbies: painting, reading, and running; she spends her weekends doing them.
  Correct: She has three hobbies: painting, reading, and running; she spends her weekends enjoying them.

In this example, a colon is used to introduce a list, and a semicolon separates two independent clauses.

3. Incorrect: I wanted to visit my friend; however: the weather was bad.
  Correct: I wanted to visit my friend; however, the weather was bad.

Here, a semicolon is used to join two independent clauses, while a comma follows a transitional phrase.

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