A tennis player tosses a tennis ball straight up and then catches it after 1.60 s at the same height as the point of release. (a) what is the acceleration of the ball while it is in flight?

Answer:

you need to consider the use for the product, how brittle the materials are, how they react to certain things, the cost of the materials, the durability and flexibility of the materials, and how easy to obtain the materials are as well as how they would work and how they would hold

Answer:

the third one T-W

Explanation:

the direction of the Tension and weight are opposite

Dual convex lenses follow a set of rules that govern their behavior when light passes through them. These rules include:

1. The incoming light rays are refracted (bent) at the first lens surface, causing them to converge towards the optical axis.

2. The converging light rays then pass through the second lens surface and are refracted again, causing them to diverge away from the optical axis.

3. The point where the refracted light rays converge or diverge is known as the focal point.

4. The distance between the lens and the focal point is known as the focal length.

5. The magnification of the image formed by the lens is determined by the ratio of the distance between the object and the lens (object distance) to the distance between the image and the lens (image distance).

Overall, dual convex lenses are powerful tools for bending and focusing light, and they play a crucial role in many fields, from medicine to astronomy.

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Answer:

convection

Explanation:

Explanation:

everything is there :v

Answer:

C. The half-life of uranium-235 is 713,000,000 years, the half-life of uranium-238 is 4,500,000,000 years

Answer:

Just because they can run doesn't mean they are fast

Explanation:

you could take a day to run across a football field, or you can take 5 minutes, which is faster?

You're friend in this equation has little to no braincells so they would have trouble seeing that running the length of a football field in five minutes is faster than a day, however, if they also said they did it in less than five minutes then it would mean your friend is fast

Answer:

Momento = 170.8 Kgm/s

Explanation:

Dados los siguientes datos;

Masa = 3,05 kg

Velocidad = 56 m/s

Para encontrar el impulso;

El momento se puede definir como la multiplicación (producto) de la masa que posee un objeto y su velocidad. El momento se considera una cantidad vectorial porque tiene magnitud y dirección.

Matemáticamente, el momento viene dado por la fórmula;

\( Momento = masa * velocidad \)

Sustituyendo en la fórmula, tenemos;

\( Momento = 3.05 * 56 \)

Momento = 170.8 Kgm/s

Solution :

A) Electric current is the flow of electrons .

B) We know, by ohm's law :

V = I × R

Putting given values in above equation, we get :

V = 0.56 × 72 V

V = 40.32 V

Hence, this is the required solution.

Answer:

54 Joules

Explanation:

recall that kinetic energy is governed by the equation:

K.E = (1/2) mv²

where,

m = mass = given as 3 kg

v = velocity = given as 6 m/s

Substituting these known values into the above equation,

K.E = (1/2) mv²

K.E = (1/2) (3)(6)²

K.E = 54 Joules

Answer:

\(kinetic \: energy = \frac{1}{2} \times m {v}^{2} \)

1/2 × 3 × 6² = 54J

Answer:

the answer is A

Explanation:

The answer is A

The Choice in which the bond Strength ranks in the correct order is Choice A; S-S < K-K < K-S

According to the question;

The bond strength of a bond increases with increasing polarity of the bond.

Evidently, From the options above; In Choice A;

The polarity of S-S < K-K < K-S

As such, the bond strength which ranks in the correct order is Choice A: S-S < K-K < K-S

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The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO₂ and water is equal to the energy required to break the bonds of sugar and oxygen. So, option A.

Through a sequence of chemical processes called cellular respiration, glucose is broken down to create ATP, which may then be used as an energy source for a variety of bodily functions. The citric acid cycle, oxidative phosphorylation, and glycolysis are the three primary phases of cellular respiration.

Carbon dioxide and water are created during cellular respiration when glucose is broken down in the presence of oxygen. The energy-carrying molecule ATP (adenosine triphosphate) absorbs the energy generated during the process.

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Answer:

The time is 0.6 sec.

Explanation:

Given that,

Acceleration of car = 7.2 m/s²

Speed = 4 m/s

We need to calculate the time

Using equation of motion

\(v=u+at\)

Where, u = initial velocity

v = final velocity

a = acceleration

t = time

Put the value in the equation

\(4=0+7.2\times t\)

\(t=\dfrac{4}{7.2}\)

\(t=0.6\ sec\)

Hence, The time is 0.6 sec.

In the Van de, Graaff generator is a rubber belt stretched over two pulleys. At the bottom is the drive pulley connected to the motor. In the generator above the drive, the pulley is covered with felt and the top pulley is bare plastic.

Van de Graaff Generators are devices used to generate large amounts of static electricity. Static electricity is created by an extra charge stored somewhere to keep things from moving. Fees generally don't like to accumulate in one place. They seek out opposite charges as partners and like to run away from particles with the same charge.

When switched on the dome of the Van de Graaff generator is charged positively or negatively depending on the design. Anything that touches the dome receives the same charge. When a person has a dome, it is charged and can stand on end if the hair is long and dry enough. Most Van de Graaff generators store a positive charge in the dome by separating the negative charge from the positive charge.

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Answer:

Accurate at 99.9999746%

Explanation:

First of all, let's calculate how many seconds we have in a year which has 365 days.

1day = 24 × 60 × 60 seconds = 86400 s

Thus, for 365 days, we have;

86400 × 365 = 31536000 seconds

Now, since 1 year has 31536000 seconds, let's find the ratio of efficiency.

We are told that the watch manufacturer claims that its watches gain or lose no more than 8 seconds in a year. Thus, efficiency is given by;

Efficiency = (8/31536000) × 100% = 0.00002536783 %

Thus, it will be be accurate at;

100% - 0.00002536783% ≈ 99.9999746%

The separation distance S between the rocks will initially increase as Rock Y falls since Rock X is already ahead of it. However, as Rock Y accelerates and gains speed, the separation distance S between the rocks will start to decrease.

Distance refers to the amount of space or physical separation between two points or objects. It is a fundamental concept in physics, mathematics, and everyday life. Distance can be measured in different units such as meters, kilometers, miles, or light-years, depending on the context and the scale of the objects being measured.

In physics, distance is a key component of many equations that describe the behavior of particles and objects. For example, the distance between two electric charges or masses determines the strength of the force between them. In mathematics, distance is the length of the shortest path between two points in a Euclidean space, and it plays a crucial role in geometry, topology, and calculus.

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The concentration of lithium ions in 0.350 M of Li₃PO₄ is .0245 M for the given molarity .

A solution's molarity (M) is the number of moles of solute dissolved in one litre of solution. To determine a solution's molarity, divide the moles of solute by the volume of the solution in litres: Molarity (M) = moles of soluteliters of solution (molL).Chemists require solution concentrations to be represented in a form that accounts for the amount of particles that react according to a specific chemical equation. Because percentage measurements are either based on mass or volume, they are often ineffective for chemical processes. It is recommended to use a concentration unit based on moles. A solution's molarity (M) is the number of moles of solute dissolved in one litre of solution.

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The results of young's double-slit experiment were

- Waves produced a diffraction pattern.

- Results supported the wave theory of light.

- Results supported the particle theory of light

Two coherent sources of light are employed in Young's double-slit experiment, which is often conducted at a distance that is only a few times greater than the wavelength of the light used. Young's double-slit experiment contributed to our knowledge of the diagrammed wave theory of light.

The act of bending of the light around edges such that it expands out and illuminates regions, where a shadow is anticipated, is known as the diffraction of light. In general, since both occur simultaneously, it is challenging to distinguish between diffraction and interference.

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Answer: A,B,E.

Explanation: doing the quiz on edge!

Answer:

A.

Explanation:

That's the answer

The tangential component of the linear acceleration of a point on the edge of the wheel 2.0 s after it has started accelerating is approximately \(1.48 m/s^2.\)

First, let's convert the initial and final speeds from revolutions per minute (rpm) to radians per second:

ω1 = 130 rpm = 130(2π/60) rad/s ≈ 13.6 rad/s

ω2 = 280 rpm = 280(2π/60) rad/s ≈ 29.3 rad/s

The angular acceleration can be calculated as:

α = (ω2 - ω1)/t = (29.3 - 13.6)/5.0 ≈ \(3.14 rad/s^2\)

At time t = 2.0 s, the angular velocity is:

ω = ω1 + αt = 13.6 + 3.14(2.0) ≈ 20.9 rad/s

The tangential component of the linear acceleration can be calculated as:

aT = rα

where r is the radius of the wheel. Substituting r = 0.47 m and α = \(3.14 rad/s^2\), we get:

aT = (0.47)(3.14) ≈ \(1.48 m/s^2\)

Therefore, the tangential component of the linear acceleration of a point on the edge of the wheel 2.0 s after it has started accelerating is approximately \(1.48 m/s^2.\)

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The correct relationship between frequency (f), speed (v), and period (T) of a sinusoidal traveling wave is f = \(\frac{1}{T}\) (option e).

The frequency of a wave represents the number of complete oscillations or cycles that occur in one second. It is measured in hertz (Hz). The period of a wave, on the other hand, is the time it takes for one complete oscillation or cycle to occur.

The relationship between frequency and period is inverse: as the frequency increases, the period decreases, and vice versa. Mathematically, the relationship is expressed as f = \(\frac{1}{T}\), where f represents frequency and T represents period.

This relationship holds true for sinusoidal traveling waves, where the speed of the wave (v) is constant. The speed of the wave is the product of frequency and wavelength, given by v = f × λ.

Therefore, the correct relationship between frequency (f), speed (v), and period (T) of a sinusoidal traveling wave is f = \(\frac{1}{T}\), as option e states.

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Answer:

1 because gravity pulls the object down towards the centre of the Earth.

The speed that the 0.25 kg block hits the ground with is 1.76 m/s.

Given that the mass of the block (m1) is 0.25 kg and the mass of the pulley (m2) is 0.50 kg, and the radius (r) of the pulley is 0.10 m. The force acting on m1 and m2 due to gravity is: F = (m1 + m2)g = (0.25 kg + 0.50 kg) * 9.8 m/s² = 7.35 N. The tension in the string is the same throughout and equal to T. The acceleration of the system is given by:a = (m2 - m1)g / (m1 + m2) = 2.94 m/s².Using the kinematic equation, v² = u² + 2as, we get:v² = 0 + 2 * 2.94 m/s² * 0.20 m = 1.176 m²/s²v = 1.08 m/s. The final velocity will be higher as the pulley will also contribute to the acceleration.

The velocity gained by the center of mass of the pulley is given by v = a * t, where t is the time taken for the blocks to move through a distance of 0.20 m. Taking the moment of inertia of the pulley into account, the net acceleration of the system is given bya = (2m1)g / (3m1 + m2) = 2.94 * (2 * 0.25) / (3 * 0.25 + 0.50) = 2.00 m/s²The velocity gained by the center of mass of the pulley is v = a * t = 2.00 m/s² * t The angular acceleration of the pulley isα = a / r = 2.00 m/s² / 0.10 m = 20.0 rad/s²The rotational motion of the pulley is given byω = ω0 + αt where ω0 is the initial angular velocity of the pulley, which is 0 as it starts from rest.ω = αt = 20.0 rad/s² * t. The velocity of the block is equal to the velocity of the center of mass of the pulley. Therefore, v = ω * r = 20.0 rad/s² * t * 0.10 m = 2.00 m/s the final velocity of the block is the vector sum of the velocity gained by the block and the velocity of the center of mass of the pulley v final = √(v² + (2.00 m/s)²) = 1.76 m/s.

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According to the question the speed of pulse is = 0.33m/s

Velocity is the pace and direction of either an object's movement, whereas speed is now the time rate which an object is travelling along a path. In other words, velocity is a vector, whereas speed would be a scalar value. If you determine how far an object travels in a certain amount of time, you can calculate its speed.For instance, an automobile is moving at a pace of 70 miles per hour if it covers 70 miles in an hour .

The equation for speed can be obtained by simply dividing time by distance.

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The magnitude of the rate of change of the current must be equal to 6.70 mV/mV.

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Answer:

composition

Explanation:

With mechanical weathering, the composition of the rocks does not change. ... This process can cause the rock to again break down into smaller pieces.

Answer:

composition

Explanation:

The drag force is the force that opposes the movement of a body through a fluid.

The drag force is the force that opposes the movement of a body through a fluid. This occurs in cases such as when a car is moving through air.

Owing to the fact that drag force tends to slow down vehicles when they move at higher speed, vehicles that are meant for racing are streamlined to reduce the drag force.

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When a boxer is moving away from a punch, the force experienced is reduced because the time of impact is increased.

The force of a punch is a product of mass and acceleration. The mass of the boxer and the fist of the opponent are constant, so the acceleration of the punch is also constant. However, if the boxer moves away from the punch, the distance that the fist has to travel to make contact with the boxer's body increases. As a result, the time of impact is longer, and the force is spread out over a longer period. This means that the force of the punch is reduced and is less likely to cause injury or knock the boxer down.

In addition, moving away from a punch can also reduce the accuracy of the punch, as the opponent's punch may miss its intended target due to the change in distance between the two boxers.

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