____ is the ability to course change in matter

Answer:

12.65 Meters / Second (m/s)

Explanation:

the problem is really easy to solve, we begin by stating the kinetic energy formula which is:

KE = (1/2)(mass)(velocity)^2

We equate 1200 J to the formula, substitute the mass, and solve for velocity either using a CAS, app, or by hand

1200J = (0.5)(15kg)v^2

v = 12.65 m/s

Answer:

a)   f ’’ = f₀ \(\frac{1 + \frac{v}{c} }{1- \frac{v}{c} }\) , b)   Δf = 2 f₀ \(\frac{v}{c}\)

Explanation:

a) This is a Doppler effect exercise, which we must solve in two parts in the first the emitter is fixed and in the second when the sound is reflected the emitter is mobile.

Let's look for the frequency (f ’) that the mobile aorta receives, the blood is leaving the aorta or is moving towards the source

                    f ’= fo\(\frac{c+v}{c}\)

This sound wave is reflected by the blood that becomes the emitter, mobile and the receiver is fixed.

                   f ’’ = f’ \(\frac{c}{ c-v}\)

where c represents the sound velocity in stationary blood

therefore the received frequency is

                 f ’’ = f₀   \(\frac{c}{c-v}\)

let's simplify the expression

                f ’’ = f₀ \frac{c+v}{c-v}

                f ’’ = f₀ \(\frac{1 + \frac{v}{c} }{1- \frac{v}{c} }\)

b) At the low speed limit v <c, we can expand the quantity

                 (1 -x)ⁿ = 1 - x + n (n-1) x² + ...

                 \(( 1- \frac{v}{c} ) ^{-1} = 1 + \frac{v}{c}\)

                f ’’ = fo \(( 1+ \frac{v}{c}) ( 1 + \frac{v}{c} )\)

                f ’’ = fo \(( 1 + 2 \frac{v}{c} + \frac{v^2}{ c^2} )\)

leave the linear term

               f ’’ = f₀ + f₀ 2\(\frac{v}{c}\)

the sound difference

               f ’’ -f₀ = 2f₀ v/c

               Δf = 2 f₀ \(\frac{v}{c}\)

Answer:

12.5m/s

Explanation:

Simplify the proportion.

200/16 = 100/8 = 50/4 = 25/2 = 12.5

Friction resists the ball’s forward motion.

Answer:

- the power rating of the resistance heater is 24139.5 W

- the inner surface temperature of the pipe at the exit is 96.34°C

Explanation:

Given the data in the question;

Flow rate of water in the tube V" = 5L/min = 8.333 × 10⁻⁵ m³/s        

The water is to be heated from 10°C to 80°C;

so Average or mean temperature \(T_{avg\) will be;

\(T_{avg\) = (T₁ + T₂) / 2 = (10 + 80) / 2 = 90/2 = 45°C

Now, from the Table " Properties of Water " at average temperature;

at \(T_{avg\) = 45°C

density p = 990.1 kg/m³

specific heat \(C_p\) = 4180 J/kg-k

thermal conductivity k = 0.637 W/m-°C

Now, we determine the mass flow;

m" = pV"

we substitute

m" = 990.1 × 8.333 × 10⁻⁵

m" = 0.08250 kg/s

we know that the power rating of the resistance heater is equal to the heat transfer rate to the water;

Q' = m"\(C_p\)( T₂ - T₁ )

we substitute

Q' = (0.08250 × 4180 ) ( 80 - 10 )

Q' =  344.85 × 70

Q' = 24139.5 W

Hence, the power rating of the resistance heater is 24139.5 W

Next, we determine the average velocity of water in the tube;

\(V_{avg\) = V" / \(A_c\)

\(V_{avg\) = V" / ( \(\frac{1}{4}\)πD² )

given that;  flows through a 2-cm-internal-diameter; D = 0.02 m

we substitute

\(V_{avg\) = (8.333 × 10⁻⁵) / ( \(\frac{1}{4}\)π × (0.02)² )

\(V_{avg\) = (8.333 × 10⁻⁵) / ( 3.14159 × 10⁻⁴ )

\(V_{avg\) =  0.265 m/s

Also, from table " saturated water property table "

At 45°C

viscosity μ = 0.596 × 10⁻³ kg/m-s

Prandtl number Pr = 3.91

Now, we determine the kinematic viscosity

v = μ / p

we substitute

v = ( 0.596 × 10⁻³ ) / 990.1

v = 6.01959 × 10⁻⁷ m²/s

so, Reynolds number in the flow region will be;

Re = (\(V_{avg\) × D) / v

we substitute

Re = ( 0.265 × 0.02) / (6.01959 × 10⁻⁷)

Re = 8804.586

we can see that our Reynolds number (  8804.586 ) more than 2300 and less than 10,000.

Hydraulic and thermal entry length are equal in this flow region,

such that;

\(L_h\) = \(L_t\)

⇒ 10 × D = 10 × 0.02 = 0.2 m

we can see that the entry length ( 0.2 m ) is smaller than the given length ( 13 m ) in the question; the flow is a turbulent flow.

So we the Nuddelt number

Nu = \(0.023Re^{0.8} Pr^{0.4\)

Nu = 0.023 × \(8804.586^{0.8\) × \(3.91^{0.4\)

Nu = 56.8

Hence, the heat transfer coefficient h will be;

h = \(\frac{k}{D}\) × Nu

we substitute

h = \(\frac{0.637}{0.02}\) × 56.8

h = 31.85 × 56.8

h = 1809.1 W/m²-°C

Now, area of the heat transfer will be

A\(_s\) = πDL

we substitute

A\(_s\) = π × 0.02 × 13

A\(_s\) = 0.8168 m²

Finally we determine the inner temperature of the pipe at exit. using the relation;

Q' = hA\(_s\)( T₃ - T₂ )

we substitute

24139.5 = 1809.1 × 0.8168( T₃ - 10 )

24139.5 = 1477.67288( T₃ - 80 )

24139.5 = 1477.67288T₃ - 118213.8304

24139.5 + 118213.8304 = 1477.67288T₃

1477.67288T₃ = 142353.3304

T₃ = 142353.3304 / 1477.67288T

T₃ = 96.34°C

Therefore, the inner surface temperature of the pipe at the exit is 96.34°C

Answer:

a. If the frequency of light is increased above the threshold frequency, the energy of the electrons emitted will increase.

b. If the frequency of light is decreased to below the threshold frequency, the rate at which electrons are emitted will decrease.

c. If the intensity of light is decreased, the energy of the electrons emitted will remain the same, but fewer electrons will be emitted.

d. If the intensity of light is decreased, the rate at which electrons are emitted will decrease.

The momentum of this system after the collision (final momentum) is 0.90 kg m/s towards the south direction. Thus, the correct option is D.

Momentum is the mass in motion. All objects have mass, so if an object is moving, then it has momentum. The amount of momentum which an object has is dependent upon two variables which are how much stuff is moving and how fast the stuff is moving.

Momentum of the system after the collision can be calculated through the law of conservation of momentum. The final momentum of the system is equal to the initial momentum of the system.

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

m₁ = m₂ = 0.21kg

u₁ = 1.7m/s

u₂ = 2.6m/s

0.21 × 1.7 + 0.21 × 2.6 = 0.357 + 0.546

Final momentum of the system = 0.903 kg m/s towards south.

Therefore, the correct option is D.

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Answer:

A.  0.19 kg m/s south

Explanation:

Q= Q1 +Q2 +Q3+Q4+ Q5

3066 J

Answer:

Energy

Explanation:

work is actually a transfer of energy. When work is done to an object , energy is transferred to that object.

The ability to do work is called energy.

"Work is the energy transferred to or from an object via the application of force along a displacement. In its simplest form, it is often represented as the product of force and displacement."

"Energy is defined as the “ability to do work, which is the ability to exert a force causing displacement of an object.”  energy is just the force that causes things to move. Energy is divided into two types: potential and kinetic."

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The linear speed will be the insect be 0.5759 meter/second carried collision with the near stationary photograph.

Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

Given that an insect lands 0.1m from the center of the turn table.

Rotational speed of the turn table = 55 rev/min

= (55×2π/60) rad/second

= 5.759 rad/second.

Hence, the speed of the insect be = Rotational speed × length

= 5.759 rad/second × 0.1 M.

= 0.5759 meter/second.

Therefore, the speed of the insect be 0.5759 meter/second.

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The cannon will completely stop when it collides with the barrier.

To calculate the speed at which the cannon collides with the barrier, we can follow these step-by-step calculations:

Determine the initial momentum of the system.

Since the cannon is initially stationary, the initial momentum is zero.

Apply the conservation of linear momentum.

According to the principle of conservation of linear momentum, the initial momentum of the system (zero) is equal to the final momentum of the system. The final momentum is the momentum of the cannon after firing.

Calculate the final momentum of the system.

Let's assume the mass of the cannon is represented by 'm' and the final velocity of the cannon is represented by 'v'. The final momentum of the system is given by: final momentum = m × v.

Set up the equation.

Since the initial momentum is zero, we have: 0 = m × v.

Solve for the final velocity of the cannon.

Dividing both sides of the equation by 'm', we get: v = 0.

Interpret the result.

The calculation shows that the final velocity of the cannon is zero. This means that the cannon comes to a complete stop when it collides with the barrier.

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Answer:

The value of g is  \(g =76.2 m/s^2\)

Explanation:

From the question we are told that

     The mass of the weight is \(m = 1.30 kg\)

      The spring  constant  \(k = 1.73 g/m = 1.73 *10^{-3} \ kg/m\)

       The second harmonic frequency is \(f = 100 \ Hz\)

       The number of oscillation is \(N = 200\)

        The time taken is  \(t = 315 \ s\)

Generally the frequency is  mathematically represented as

           \(f = \frac{v}{\lambda}\)

At second harmonic frequency the length of the string vibrating is equal to  the wavelength of the wave generated

         \(l = \lambda\)

Noe from the question the vibrating string is just half of the length of the main string so

Let assume the length of the main string is  \(L\)

So      \(l = \frac{L}{2}\)

The velocity of the vibrating string is mathematically represented as

             \(v = \sqrt{\frac{T}{\mu} }\)

Where T is the tension on the string which can be mathematically represented as

             \(T = mg\)

So  

           \(v = \sqrt{\frac{mg}{k} }\)

Then

          \(f = \frac{v}{\frac{L}{2} }\)

=>       \(v = \frac{fL }{2}\)

=>      \(\sqrt{\frac{mg}{k} } = \frac{fL}{2}\)

=>        \(g = \frac{f^2 L^2 \mu}{4m}\)

substituting values

             \(g = \frac{(100) * (1.73 *10^{-3} )}{(4 * 1.30)} L^2\)

              \(g = 3.326 m^{-1} s^{-2} L^2\)

Generally the period of oscillation is mathematically represented as

       \(T_p = 2 \pi \sqrt{\frac{L}{g} }\)

=>   \(L = \frac{T^2 g}{4 \pi ^2}\)

   The period can be mathematically evaluated as

                \(T_p = \frac{t}{N}\)

 substituting values

             \(T_p = \frac{315}{200}\)

             \(T_p = 1.575 \ s\)

Therefore

          \(L = \frac{1.575^2 * g }{4 \pi ^2}\)

           \(L = 0.0628 ^2 g\)

so

      \(g = 3.326 m^{-1} s^{-2} L^2\)

substituting for L

        \(g = 3.326 ((0.0628) g)^2\)

=>    \(g = \frac{1}{(3.326)* (0.0628)^2}\)

       \(g =76.2 m/s^2\)

As a result, the maximum mass that the hair strand can sustain before breaking is 0.91 kg, or 910 grams.

Speed is a measure of how fast an object is moving. It is defined as the distance traveled by an object per unit of time, typically in meters per second (m/s) or kilometers per hour (km/h). Speed is a scalar quantity, which means that it has only a magnitude (i.e. the numerical value) and no direction. This is different from velocity, which is a vector quantity that also takes into account the direction of motion. Speed can be constant or variable. When an object moves at a constant speed, it covers equal distances in equal intervals of time. When an object moves at a variable speed, its speed changes over time and its distance traveled also changes. Speed is an important concept in physics and is used in many real-world applications, such as transportation, sports, and engineering. Understanding speed and how it is affected by different factors can help us design better and more efficient systems, and can also help us make better decisions in our daily lives.

Here,

To solve this problem, we can use the concept of centripetal force, which is the force that is required to keep an object moving in a circular path. The centripetal force is given by:

F = (m * v²) / r

where F is the centripetal force, m is the mass of the object, v is its tangential speed, and r is the radius of the circular path.

In this case, the mass of the hair strand is not given, but we can assume that it is negligible compared to the mass of the attached mass. Therefore, we can use the given mass of 25g in our calculations.

We can also assume that the radius of the circular path is equal to the length of the hair strand, or 4.32 m.

We are given that the hair strand broke when the tangential speed of the mass reached 8.1 m/s. Therefore, we can set the centripetal force equal to the force that the hair strand can support before breaking:

F = m * g = 25g * 9.81 m/s²= 245.25 N

where g is the acceleration due to gravity.

Setting the centripetal force equal to the force that the hair strand can support, we can solve for the mass:

F = (m * v²) / r

245.25 = (m * 8.1²) / 4.32

m = (245.25 * 4.32) / 8.1²

m = 0.91 kg

Therefore, the mass that the hair strand could support before breaking is 0.91 kg, or 910 grams.

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The frequency of the radiation = 10GHz

The wavelength of the electromagnetic radiation, λ = 3.5 cm

λ = 3.5/100 m

λ = 0.035 m

The speed of light, c = 3 x 10⁸ m/s

Calculate the frequency (f) of the radiation using the formula:

The frequency of the radiation = 10GHz

The magnitude of the boat’s resultant velocity with respect to the starting point is 6.0 m/s. Hence, option (3) is correct.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.

The velocity of the boat in  still water = 5 meters per second along east.

The velocity of stream =  3.3 meters per second along south.

Hence, the magnitude of the boat’s resultant velocity with respect to the starting point is = √(5² + 3.3²) m/s

=6.0 m/s.

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Grouping data refers to the process of categorizing or organizing data based on specific criteria or attributes.

It involves grouping similar data points together to gain a better understanding of patterns, relationships, and trends within the dataset. By grouping data, you can simplify complex information and derive meaningful insights from large amounts of data. The purpose of grouping data is to create subsets or clusters that share common characteristics.

This enables easier analysis, summarization, and comparison of data within each group. Grouping can be performed on various types of data, such as numerical, categorical, or time-based data. Grouping data allows for the exploration of data at different levels of granularity.

For example, you can group sales data by region to analyze regional performance, or group customer data by demographics to identify specific customer segments. This process helps in identifying outliers, detecting patterns, and making data-driven decisions.

Common techniques for grouping data include using functions like GROUP BY in SQL or utilizing data visualization tools to create charts or graphs that illustrate the grouped data. Grouping can be applied in various fields, such as marketing, finance, healthcare, and research, to uncover insights and support decision-making processes.

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Answer:

Calcium is an essential mineral that is important in the diet of many living things as it plays several important roles in the body:

1. Bone and teeth formation: Calcium is a key component of bones and teeth, making them strong and healthy.

2. Muscle function: Calcium plays a critical role in muscle contraction and relaxation, helping muscles function properly.

3. Nerve function: Calcium is involved in the transmission of nerve impulses, which allows for proper communication between nerve cells.

4. Blood clotting: Calcium is required for blood clotting, which is important for preventing excessive bleeding after an injury.

5. Cellular signaling: Calcium is involved in many cellular signaling pathways, helping to regulate various physiological processes in the body.

Therefore, having an adequate amount of calcium in the diet is crucial for the overall health and well-being of many living organisms.

The total resistance of the circuit is 49 Ω. The current strength in the circuit, when connected to a voltage source of 56 V, is approximately 1.14 A.

To calculate the total resistance of the circuit, we need to determine the equivalent resistance of the resistors connected in a series.

Given:

R1 = 4 Ω

R2 = 30 Ω

R3 = 10 Ω

R4 = 5 Ω

Calculate the equivalent resistance (RT) of R1 and R2, as they are connected in series:

RT1-2 = R1 + R2

RT1-2 = 4 Ω + 30 Ω

RT1-2 = 34 Ω

Calculate the equivalent resistance (RTotal) of RT1-2 and R3, as they are connected in parallel:

1/RTotal = 1/RT1-2 + 1/R3

1/RTotal = 1/34 Ω + 1/10 Ω

1/RTotal = (10 + 34) / (34 * 10) Ω

1/RTotal = 44 / 340 Ω

1/RTotal ≈ 0.1294 Ω

RTotal ≈ 1 / 0.1294 Ω

RTotal ≈ 7.74 Ω

Calculate the equivalent resistance (RTotalCircuit) of RTotal and R4, as they are connected in series:

RTotalCircuit = RTotal + R4

RTotalCircuit = 7.74 Ω + 5 Ω

RTotalCircuit ≈ 12.74 Ω

Therefore, the total resistance of the circuit is approximately 12.74 Ω.

To determine the current strength (I) when connected to a voltage source of 56 V, we can use Ohm's Law:

I = V / RTotalCircuit

I = 56 V / 12.74 Ω

I ≈ 4.39 A

Therefore, the current strength in the circuit, when connected to a voltage source of 56 V, is approximately 4.39 A (or 1.14 A, considering significant figures).

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Answer:

6.9m

Explanation:

I divide 75m by 12 seconds.

Please give BRAINLIEST

Answer:

44°

Explanation:

Look for the longest distance under the 'Distance ' column....look to the left to find the corresponding angle

  Table clearly shows that the longest distance (133 ft) occurs at angle of 44°

The maximum width of the slit (in nm) for which no diffraction minima are observed is 569 nm.

The maximum width of the slit (in nm) for which no diffraction minima are observed is calculated by applying the following equation.

sinθ = mλ/a

where;

Substitute the given parameters and solve for the maximum width of the slit (in nm) for which no diffraction minima are observed.

sin(90) = (1 x 568.7 nm) / a

1 = (568.7 nm) / a

a = (568.7 nm) /1

a = 568.7 nm

to the closest integer = 569 nm

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The pressure exerted by a rectangular block on the ground is 8 Pascal (Pa) when its weight is 320 N and its dimensions are 4 meters by 10 meters. The greatest pressure occurs when the block is vertically placed at 20 Pa, while the least pressure occurs when it is horizontally placed at 8 Pa.

To calculate the pressure exerted by the rectangular block on the ground, we need to consider the formula for pressure:

Pressure = Force / Area

Given that the weight of the block is 320 N and the dimensions of the block are 4 meters by 10 meters, we can calculate the area of the block in contact with the ground. In this case, it is the length multiplied by the width of the block.

Area = length * width

Area = 4 meters * 10 meters

Area = 40 square meters

Now, we can calculate the pressure exerted by the block on the ground:

Pressure = 320 N / 40 square meters

Pressure = 8 N/m^2 (Pascal)

Therefore, the pressure exerted by the rectangular block on the ground is 8 Pascal (Pa).

To determine the greatest pressure and the least pressure that can be exerted on the ground, we need to consider the orientation of the block.

The greatest pressure occurs when the block is placed vertically on one of its smallest faces. In this case, the entire weight of the block (320 N) is concentrated on a smaller area.

The area in contact with the ground is given by the length multiplied by the width of the smallest face.

Area = 4 meters * 4 meters = 16 square meters

Greatest Pressure = 320 N / 16 square meters = 20 \(N/m^2\)(Pascal)

The least pressure occurs when the block is placed horizontally on one of its largest faces. In this case, the weight of the block is distributed over a larger area.

The area in contact with the ground is given by the length multiplied by the width of the largest face.

Area = 4 meters * 10 meters = 40 square meters

Least Pressure = 320 N / 40 square meters = 8 \(N/m^2\)(Pascal)

Therefore, the greatest pressure that can be exerted on the ground is 20 Pascal (Pa), and the least pressure is 8 Pascal (Pa).

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1) The photoelectric effect is the phenomena by which, the metals release electrons when they are exposed to electromagnetic radiation with the suitable frequency. The photoelectrons are the electrons that are released in this process.

So, the statement is true.

2) In a particle model, energy transfer can be done through many ways such as:

The energy jumps between the particles in the form of photons.

Electrons can absorb or emit energy during energy transfer.

The energy is transferred between different objects in the form of photons.

So, all of them are true.

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The horizontal layer of soil called are called soil horizons.

Soil is made up of clear horizontal layers; these layers are called horizons. They range from rich, organic upper layers (humus and topsoil) to basic rocky layers ( subsoil, regolith, and bedrock). Soils are named and confidentially based on their horizons.

The soil profile has four distinct layers a soil horizon is a horizontal layer of soil with physical or chemical attributes that separate it from layers above and below. More simply, each horizon. Soil is made up of clear horizontal layers. These layers are called horizons.

So we can conclude that A soil horizon is a layer parallel to the soil aspect whose physical, chemical, and biological quality differ from the layers.

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ANSWER

EXPLANATION

To find the strength of the electric field, apply the formula below:

where F = electric force, q = charge of the electron

Hence, the strength of the electric field is:

That is the answer.

When filled with extra air its mass increased to 0.428kg also the top of polythene container mass connected to the perplex box of volume 1000cm³ and the number of times of air inside was 7.2 times. The density of the air filled in the polythene container is approximately 1.25 kg/m³.

The density of air filled in the polythene container can be determined by considering the change in mass and volume of the container before and after filling it with air. Given that the mass of the empty container is 0.419 kg and the mass of the container when filled with extra air is 0.428 kg, and the volume of the perplex box is 1000 cm³.

Calculate the mass of the air inside the container by subtracting the mass of the empty container from the mass of the container when filled with air:

Mass of air = Mass of filled container - Mass of empty container

= 0.428 kg - 0.419 kg

= 0.009 kg

Calculate the volume of the air inside the container using the given number of times the air inside is 7.2:

Volume of air = Volume of perplex box * Number of times air inside

= 1000 cm³ * 7.2

= 7200 cm³

Convert the volume of air to cubic meters (m³) by dividing by 1000000:

Volume of air = 7200 cm³ / 1000000

= 0.0072 m³

Calculate the density of air using the formula:

Density = Mass / Volume

Density = 0.009 kg / 0.0072 m³

≈ 1.25 kg/m³

Therefore, the density of the air filled in the polythene container is approximately 1.25 kg/m³.

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Answer:

A notebook because they can take notes of what they have learned

Explanation:

W = mgh= 66* 9.83.7=2393J.

Force applied across a distance is called work. Examples of work include dragging down a captive helium balloon, driving a car up a hill, and lifting an object against the gravitational attraction of the Earth.

Energy manifests mechanically as work. The joule (J), or newton-meter (N m), is the accepted unit of work. In base International System of Units (SI) units, this equals one kilogram-meter squared per second squared (kg m 2 /s 2 or kg m 2 /s -2).

As a substitute, the erg, which is equal to a dyne-centimeter (dyn-cm), can be used to measure work. In base SI units, one erg is equal to one gram-centimeter squared per second squared (g cm 2 /s 2 or g cm 2 s -2).

Therefore, W = mgh= 66* 9.83.7=2393J.

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