A ball is launched from the ground with a horizontal speed of 30 m/s and a vertical speed of 30 m/s. How long will it take to get to the top of its trajectory?

The ball has more mass being pumped with air. So, option (C) is correct answer.

In physics, mass is a quantitative measurement of inertia, a basic characteristic of all matter. It essentially refers to a body of matter's resistance to changing its speed or location in response to the application of a force. The change caused by an applied force is smaller the more mass a body has. The kilogram serves as the unit of mass in the International System of Units (SI).

As the amount of air is added to the basketball by pumping it up with air, the mass of air is also added with the basketball. Hence, the ball has more mass now.

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Answer:

9.8 meters per square second

Explanation:

Free Falling Object. the value of g is 9.8 meters per square second on the surface of the earth. The gravitational acceleration g decreases with the square of the distance from the center of the earth. But for many practical problems, we can assume this factor to be a constant.

The wavelength of the wave is approximately 0.376 meters.

Wavelength can be defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave.

The speed of a sound wave is related to its wavelength and time period by the formula, λ = v × T where, v  is the speed of the wave, λ is the wavelength of the wave and T is the time period of the wave.

To find the wavelength of a wave with a speed of 75.0 m/s and a period of 5.03 ms, you can use the formula:

Wavelength = Speed × Period

First, convert the period from milliseconds to seconds:
5.03 ms = 0.00503 s

Now, plug in the given values into the formula:
Wavelength = (75.0 m/s) × (0.00503 s)

Multiply the values:
Wavelength ≈ 0.376 m

So, the wavelength of the wave is approximately 0.376 meters.

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The option that is incorrectly matched among the following is Streptococcus pyogenes-beta hemolysis.  Hence option D is correct

Streptococcus pyogenes - beta hemolysis Streptococcus pyogenes is correctly matched with beta-hemolysis. Beta-hemolysis refers to a complete breakdown of the red blood cells in the blood agar medium. Therefore, it is incorrect to say that Streptococcus pyogenes is incorrectly matched with beta-hemolysis. Hence, option (D) Streptococcus pyogenes-beta hemolysis is incorrect. Other options are: E. coli - pink colonies on MacConkey agar: E. coli, a gram-negative bacteria is correctly matched with pink colonies on MacConkey agar.

MacConkey agar is a selective and differential agar used for the isolation and identification of gram-negative bacteria. Hence, option (A) E. coli - pink colonies on MacConkey agar is correct. Serratia marcescens - red pigment: Serratia marcescens is a gram-negative bacteria that produces a red pigment on the culture medium. Hence, option (B) Serratia marcescens - red pigment is correct. Pseudomonas aeruginosa - green pigment: Pseudomonas aeruginosa is a gram-negative bacteria that produces a green pigment on the culture medium. Hence, option (C) Pseudomonas aeruginosa - red pigment is incorrect.

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Skeletal muscles are the muscles that move bones. Muscles move by shortening or contracting, which causes the bone to move. Pairs of skeletal muscles cooperate. The other muscle relaxes when the first one contracts.

The "Fasicles," or bundles of individual muscle cells that make up skeletal muscle, are encased in "Perimysium," a layer of connective tissue. a collection of muscle fibers joined as a functional unit by connective tissue. the band of connective tissue that envelops every fascicle.

Muscle of the Skelet The only kind of muscle you have control over is skeletal muscle, often known as voluntary muscle. The bones are connected to skeletal muscles, which move the skeleton.

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Answer:

when a two bodies A and B are moving at an angle 180° with each other then the relative velocity is the sum of bodies the velocity .i.e,

when the bodies move the opposite direction

then their relative velocity is the sum of individual velocities.

Answer:

The magnitude of the point charge is 3.496 x 10⁻⁶ C

Explanation:

Given;

radius of the surface, r = 14.3 m

magnitude of the potential, V = 2.2 kV = 2,200 V

The magnitude of the point charge is calculated as follows;

\(V = (\frac{1}{4\pi \epsilon _0} )(\frac{Q}{r} )\\\\V = \frac{KQ}{r} \\\\Q = \frac{Vr}{K} \\\\Q = \frac{2,200 \times 14.3}{9\times 10^9} \\\\Q = 3.496 \times 10^{-6} \ C\\\\Q = 3.496 \ \mu C\)

Therefore, the magnitude of the point charge is 3.496 μC

Answer:

hypotenuse = 21.6cm

Explanation:

I have attached photo with working.

Answer:

The work done on the hose by the time the hose reaches its relaxed length is 776.16 Joules

Explanation:

The given spring constant of the of the spring, k = 88.0 N/m

The length by which the hose is stretched, x = 4.20 m

For the hose that obeys Hooke's law, and the principle of conservation of energy, the work done by the force from the hose is equal to the potential energy given to the hose

The elastic potential energy, P.E., of a compressed spring is given as follows;

P.E. = 1/2·k·x²

∴ The potential energy given to hose, P.E. = 1/2 × 88.0 N/m × (4.20 m)²

1/2 × 88.0 N/m × (4.20 m)² = 776.16 J

The work done on the hose = The potential energy given to hose, P.E. = 776.16 J

Light takes 1.5 nanoseconds from your outstretched hand to reach your eyes.

In physics, light travels through vacuum with the highest speed i.e. 3 x \(10^{8}\) m/s.

In one second, light can travel up to 300,000 kilometers.

It means, to travel a distance of one foot or 30 centimeters, the time taken by light is 1 nanosecond.

So, in our case we can see that in order to travel from outstretched hand to your eyes, the time take by light is 1.5 nanoseconds. It is because, the distance between outstretched hand and eye is approximately 1.5 feet, therefore, light takes 1.5 nanoseconds.

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The square coil of wire is wrapped with 2500 turns of wire and encloses an area with sides 3.0 cm long. The uniform magnetic field is perpendicular to its plane, and the field increases to 0.12 T during an interval of 1.0 s. The average voltage induced in the coil can be found using the equation V = NAB/Δt.

It refers to the degree of consistency between the results of repeated measurements. A precise measurement system will give consistent results in repeated measurements. Therefore, a precise instrument will have less random error and higher accuracy.

Where V is the average voltage, N is the number of turns of wire, A is the area of the coil, B is the magnetic field, and Δt is the time interval. The area of the coil is (3.0 cm)2 = 9.0 cm2 or 9.0 × 10-4 m2. Therefore, V = (2500)(9.0 × 10-4 m2)(0.12 T)/1.0 s = 0.27 V.Thus, the average voltage induced in the coil is 0.27 V.

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An experience that forces an individual to confront an existential issue is known as a boundary situation in this type of context.

This type of situation is characterized by negative consequences which the individual tries to escape from in an unfruitful attempt. It usually makes the individual feel like it can't be overcome and is also likely to enter deep into the crisis.

This experience forces an individual to confront an existential issue so as to prevent it from escalating into a very difficult position and to promptly address the situation through employing different types of techniques. This ensures that a reoccurence doesn't come up in this type of situation.

This is therefore the reason why boundary situation was chosen as the most appropriate choice.

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The difference of time between a sound from the stage reaching your ear directly and the same sound reaching your ear after reflecting from the back wall would be 0.036s.

An echo is a reflection of sound that comes to the audience with a delay after the direct sound in audio signal processing and acoustics. The delay is directly proportionate to the separation between the source and the listener of the reflecting surface. One the kind audio effect that involves significantly delaying a signal is an echo effect. In this instance, after some period of time, listeners hear the same signal repeated clearly. When there is a noticeable delay in the sound, listeners can differentiate individual echoes.

The person seated in the middle row:

The distance sound traveled to middle row => 25/2 = 12.5m

The total distance the sound traveled to full length of auditorium and to the middle row => 25+12.5 => 37.5m

t1 => d1/v => 12.5/343 => 0.036s

t2 => d2/v => 25/343 => 0.072s

t2-t1 => 0.036s

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Answer:

False

Explanation:

I'm not the most sure but it seems reasonable that it's false

Good Luck Bestie :3

Answer:

The answer is false. If you want why. I will desxribe you.

0.1 J of elastic potential energy will be stored by the spring when it gets compressed by 0.2 m if it has the spring constant of 5 N/m.

Elastic potential energy can be defined as the potential energy stored by the spring when it is stretched or compressed.

According to the question.

Compression in the spring, x = 0.2 m

Spring constant, k = 5 n/m

Elastic potential Energy, U = \(\frac{1}{2} (0.2)^{2} (5)\)

U = 0.1 J

0.1 J of elastic potential energy will be stored by the spring.

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Answer:

true

Explanation:

Answer: True

Explanation:

Answer:

As atoms in the spoon vibrates about their equilibrium positions and transfer energy form one end to other end. This process is called conduction.

The given statement is that the temperature in degrees Fahrenheit in times square during a day in August can be predicted by the function t(x).

Hence, it can be stated that the function t(x) provides a prediction for the temperature in degrees Fahrenheit in Times Square for a given value of x. Here, x represents the input variable.

It is important to note that the input variable must be provided in the correct units and format as required by the function t(x).The content loaded refers to the data that has been previously collected and is available for analysis. In the context of predicting temperature using function t(x),

the content loaded can refer to temperature data collected in Times Square during August on previous days or years. This data can be analyzed and used to develop the function t(x) that predicts temperature for a given input variable x.

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5,28 ft is the distance from the base of the cliff to the point on the ground.

This question is incomplete, it should be:

Height of the cliff = 462 ft

Angle of depression = 5°

Determine the angle of the base first,

Use the hypotenuse side:

90° - 5° = 85°

Hence, the angle of depression form the top of the cliff = 5°

So, the distance from the base of the cliff to the point on the ground:

tan α = opposite / adjacent

tan 85° = h/462

h = 462 × tan 85°

= 462 x 11.43

h ≈  5,28 ft

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In a head-on proton-proton collision, the ratio of kinetic energy in the center of the mass system to the incident kinetic energy can be approximated using the first two nonzero terms of the Taylor series.
Let's denote the ratio of kinetic energy in the center of the mass system to the incident kinetic energy as R.

To find R, we can use the Taylor series expansion. The Taylor series expansion of a function f(x) centered at a point a is given by:
f(x) = f(a) + f'(a)(x-a) + (f''(a)/2!)(x-a)^2 + ...

In this case, we want to approximate R using the first two nonzero terms. Let's assume that E is the incident kinetic energy and mc^2 is the rest energy of the protons. Since we are considering an extremely relativistic scenario where E is much greater than mc^2 (E >> mc^2), we can use the hint given in the problem that if x >> y, then xy ≈ 0.
So, we have R ≈ 1 + 0 + ... (ignoring higher-order terms)

Therefore, the approximation of R with the first two nonzero terms of the Taylor series when E <> mc^2 is:
R ≈ 1

This means that in the extremely relativistic scenario, the ratio of kinetic energy in the center of the mass system to the incident kinetic energy is approximately 1.

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Answer:

i dont know french but i would say 7 but i cant read the question so thats just a guess

Explanation:

The given information describes a transverse wave on a slinky, mmary:with vertical distances, frequency, and horizontal distances provided. To determine the amplitude, period, wavelength, and speed of the wave, we can utilize the formulas associated with these wave characteristics. The amplitude is calculated using the vertical distance, the period is the reciprocal of the frequency, the wavelength is the horizontal distance, and the speed of the wave can be found by multiplying the frequency and wavelength.

The amplitude of the wave is determined by the vertical distance from a trough to a crest, which is given as 32 cm. The period of the wave is the reciprocal of the frequency, so it is equal to 1/2.4 Hz. The wavelength is represented by the horizontal distance from a crest to the nearest trough, which is stated as 48 cm. Lastly, the speed of the wave can be calculated by multiplying the frequency and wavelength, giving the product of 2.4 Hz and 48 cm.

In summary, the amplitude of the wave is 32 cm, the period is approximately 0.42 seconds, the wavelength is 48 cm, and the speed of the wave is approximately 115.2 cm/s.

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The resulting equation of motion for the system is given by m × x''(t) + k × x(t) = f(t), which is 2 × x''(t) + 18 * x(t) = 2 * sin(2t).

What is  equation of motion?

The equations of motion are a set of mathematical relationships that describe the motion of objects under the influence of forces. There are different sets of equations of motion, depending on the specific scenario and the type of motion being considered (linear motion, projectile motion, circular motion, etc.). The equations of motion for linear motion, also known as the equations of uniformly accelerated motion.

To find the equation of motion for the system, we start with Newton's second law of motion, which states that the sum of forces acting on an object is equal to the mass of the object multiplied by its acceleration. In this case, the object is the 2-kg mass attached to the spring.

The force exerted by the spring is proportional to the displacement of the mass from its equilibrium position, and it can be expressed as F_spring = -k× x(t), where k is the spring constant and x(t) is the displacement of the mass at time t.

In addition to the force exerted by the spring, there is an external force f(t) = 2 ×sin(2t) acting on the mass.

Applying Newton's second law, we have the equation of motion: m ×x''(t) + k ×x(t) = f(t).

Substituting the given values, m = 2 kg and k = 18 N/m, we obtain 2 ×x''(t) + 18 × x(t) = 2 ×sin(2t).

Therefore, the resulting equation of motion for the system is 2 × x''(t) + 18 × x(t) = 2 × sin(2t).

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The pace at which electrons flow past a location in a complete electrical circuit is defined as current.

In a circuit, the maximum alternating voltage and current are 400 V and 20 A, respectively. The alternating values have a frequency of 50 hertz and are sinusoidal. Current is the rate at which a charge moves through a circuit point. The highest current might be drawn while the external resistance is zero. Electromotive force, abbreviated E or emf, is the amount of energy per unit electric charge delivered by an energy source such as a generator or a battery. As the gadget works on the electric charge being transported inside itself, energy is changed from one form to another in the generator or battery.

Electromotive force (also electroosmotic, abbreviated emf, indicated or) is an energy transfer to an electric circuit per unit of electric charge, measured in volts, in electromagnetism and electronics. Electrical transducers generate an emf by transforming various types of energy into electrical energy.

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Answer

Explanation

Answer:

D. 100 J

Explanation:

Given

Mass (m) = 2 kg

Height (h) = 5 m

Acceleration due to gravity (g) = 10 m/s²

Now

Work done(W)

= m * g * h

= 2 * 10 * 5

= 100 Joule

Hope it will help :)❤

The work done in uplifting a brick having a mass of 2kg along with a height of 5m above ground level would be:

D). 100 J

Given that,

Mass of the brick \(= 2Kg\)

Height of the brick \(= 5m\)

As we know,

Work Done (W) \(= mgh\)

where

m = Mass

g = Acceleration due to gravity

h = height

A.T.Q.

By substituting the given values, we get;

\(Work Done (W)\) \(= 2\) × \(10\) × \(5\)            (taking \(g = 10 m/s^2\))

\(= 100 J\)

Thus, the work done is 100 J and hence, option D is the correct answer.

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In a chemical reaction, activation energy increases the energy state of the reactants. This outcome causes the particles to collide with greater force and frequency, which results in the formation of new products.

Activation energy is the minimum amount of energy required for a chemical reaction to occur. In a chemical reaction, the reactants need to overcome a certain energy barrier before they can form products. This energy barrier is known as the activation energy. When the activation energy is high, it means that the reactants require more energy to overcome the energy barrier and form products.

This causes the particles to collide with greater force and frequency, resulting in a higher likelihood of successful collisions and the formation of new products. Therefore, activation energy plays a critical role in determining the rate of a chemical reaction and the amount of product that is formed.

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Even if the submarine's mass rises while its volume stays constant, the buoyant force on it doesn't change. As a result, the buoyant force on the submarine has changed by around 9,434.53 N.

The air in the ballast tanks is evacuated out of the submarine as it dives, and the ballast tanks are flooded with water until the submarine's overall density is greater than the surrounding water, at which point the submarine starts to sink. (negative buoyancy).

Identify the buoyant force change:

The weight of the displaced water changes in proportion to the change in buoyant force. As a result, the buoyant force has changed as follows:

change in buoyant force = change in weight of displaced water

change in buoyant force = 9,434.53 N

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A 10-pound sack of potatoes falls from an airplane, and as its velocity increases, the air resistance on it also increases. The acceleration of the sack at this point is zero.

When an object falls through the atmosphere, it experiences two main forces: gravitational force and air resistance. Initially, when the sack starts falling, the gravitational force is greater than the air resistance, resulting in a net downward force and an acceleration in the downward direction.

As the velocity of the falling sack increases, the air resistance also increases. Eventually, a point is reached where the air resistance becomes equal in magnitude to the gravitational force. At this point, the net force on the sack becomes zero, and it reaches a state of terminal velocity. Terminal velocity is the constant velocity achieved by an object falling through a fluid when the drag force equals the gravitational force.

Given that the air resistance equals 10 pounds, which is equal in magnitude to the gravitational force on the sack, we can conclude that the net force on the sack is zero. Therefore, the acceleration of the sack at this point is zero.

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The direction of the courts in recent years has been towards expanding and strengthening the rights of the accused, while also ensuring that justice is served and the rights of victims are protected.

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