When stated as a percentage, the useful energy transferred by a device divided by the total energy supplied to the device is known as the device's __________. What one word completes the sentence?

Answer:

Real Image

Explanation:

Images which are formed on the screen by the actual intersection of light rays are called real images.

Answer:

Explanation:

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To find the % composition of the compound, we need to first determine the empirical formula by finding the smallest whole number ratio of atoms present in the compound.

Step 1: Convert the given masses of Mg and N to moles using their respective atomic masses.

Moles of Mg = 9.03 g / 24.31 g/mol = 0.371 mol
Moles of N = 3.48 g / 14.01 g/mol = 0.248 mol

Step 2: Divide both the number of moles by the smallest number of moles obtained to get the simplest whole number ratio.

0.371 mol / 0.248 mol = 1.49 (approx. 1.5)
0.248 mol / 0.248 mol = 1

Therefore, the empirical formula of the compound is Mg3N2.

Step 3: Calculate the total molar mass of the compound.

Mg3N2 = (3 x 24.31 g/mol) + (2 x 14.01 g/mol) = 100.95 g/mol

Step 4: Calculate the % composition of each element in the compound.

% composition of Mg = (3 x 24.31 g/mol) / 100.95 g/mol x 100% = 72.12%
% composition of N = (2 x 14.01 g/mol) / 100.95 g/mol x 100% = 27.88%

Therefore, the % composition of the compound Mg3N2 is 72.12% Mg and 27.88% N.

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In the thermal equilibrium, the change in temperature is said to be zero in between the bodies. Thermal equilibrium is reached when both objects have the same temperature.

Thermal equilibrium is easily explained by the zeroth law of thermodynamics. If any two-body is at thermal equilibrium there is no change in the temperature of the body.

According to zeroth law if body A is in thermal equilibrium with body B and body B is in thermal equilibrium with C . So body A and C are also in thermal equilibrium.

In the thermal equilibrium, the net heat transfer is said to be zero in between the bodies.

Hence option A IS RIGHT. Thermal equilibrium is reached when both objects have the same temperature

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A "hot spot" is a non-plate boundary location where mafic magmas are commonly produced. If situated underwater, hot spots can result in the extrusion of pillow basalts.

Hot spots are distinct from diverging, converging, or transform plate boundaries. They occur as stationary areas of volcanic activity, arising from plumes of hot mantle material ascending through the Earth's crust. As tectonic plates move over these hot spots, volcanic activity ensues, often giving rise to chains of volcanic islands or seamounts, as seen in the case of the Hawaiian Islands.

The magma generated at hot spots tends to be mafic in composition, containing a higher proportion of basaltic lava. This contrast to the typically felsic magmas produced at plate boundaries makes hot spots significant in understanding the Earth's geology and volcanic processes.

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The most common method to form an image in the Scanning Electron Microscope (SEM) is to detect secondary electrons and/or backscattered electrons.

In SEM imaging, a focused electron beam is scanned over the surface of the sample. When the primary electron beam interacts with the atoms of the sample, various signals are emitted, including secondary electrons and backscattered electrons.

Secondary electrons are low-energy electrons that are emitted from the top few nanometers of the sample's surface. They provide information about the topography and surface features of the sample. By detecting and collecting these secondary electrons, an image can be formed that represents the surface morphology and fine details of the sample.

Backscattered electrons, on the other hand, are higher-energy electrons that undergo scattering and are deflected backward as they interact with the atomic nuclei of the sample. These electrons are sensitive to variations in atomic number and density, providing information about the composition and elemental distribution of the sample.

Detectors within the SEM capture and measure the signals from secondary and/or backscattered electrons, converting them into electrical signals that are then used to form the final image. Different detectors may be used depending on the specific imaging requirements, such as the Everhart-Thornley detector for secondary electron imaging and the solid-state or scintillator detectors for backscattered electron imaging.

In addition to secondary and backscattered electrons, other signals such as characteristic X-rays and cathodoluminescence can also be detected and utilized for specific imaging techniques in the SEM.

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The term that is formed from two pieces of different metals stuck together lengthwise is bimetallic coil.

What is a bimetallic coil-A bimetallic coil is an essential component of many temperature control devices. Bimetallic coils are also known as bimetallic strips, and they are made up of two different types of metal bonded together and wound into a coil shape.Bimetallic coils are used to create a temperature-sensitive sensor that can open and close a circuit as temperatures rise or fall. This capability allows bimetallic coils to be used in a variety of devices, including thermostats, heat pumps, and furnace limit switches.The structure of bimetallic coils : A bimetallic strip is made up of two separate metals that are bonded together. These metals have different coefficients of thermal expansion, which means that they expand and contract at different rates as the temperature changes.When the bimetallic coil is exposed to heat, the metal with the lower coefficient of thermal expansion will expand more than the metal with the higher coefficient of thermal expansion.

This causes the bimetallic strip to bend, which can be used to open or close a circuit.In summary, bimetallic coils are temperature-sensitive sensors used to regulate the temperature of devices. The bimetallic coil is formed by bonding two different metals together and winding them into a coil shape.

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Answer:

Trabajo realizado = 600 Nm

Explanation:

Dados los siguientes datos;

Fuerza = 200 Newton

Distancia = 3 metros

Para encontrar el trabajo realizado; Trabajo realizado = fuerza * distancia

Sustituyendo en la ecuación, tenemos; Trabajo realizado = 200 * 3

Trabajo realizado = 600 Nm

The tennis ball's momentum change during the impact with the wall is -3.48 kg·m/s.

During the collision, the change in momentum can be calculated by subtracting the initial momentum from the final momentum. Given that the mass of the tennis ball is 58 grams (0.058 kg), its initial speed is 180 m/s, and its speed after impact is 120 m/s, we can determine the change in momentum.

To calculate the initial momentum, we multiply the mass of the ball by its initial speed: 0.058 kg × 180 m/s. Similarly, the final momentum is obtained by multiplying the mass of the ball by its speed after impact: 0.058 kg × 120 m/s. Subtracting the initial momentum from the final momentum gives us the change in momentum during the impact.

Therefore, the change in momentum of the tennis ball during the impact with the wall is determined to be -3.48 kg·m/s. The negative sign indicates a reversal in the direction of momentum, suggesting that the ball changes its direction after colliding with the wall. This change in momentum reflects the transfer of momentum from the ball to the wall during the collision, resulting in a decrease in the ball's speed.

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Answer:

I'm pretty sure its 3m/s^2 for the acceleration but I don't know the force part sorry .

Explanation:

15m/s - 0m/s divided by 5 s = 3m/s

I'm no expert or anything so I could be wrong but this is the best I can give you. Sorry

Answer: Tap root

Explanation: that should be it! hope this helps!

Answer:

Dicots

Dicots have “taproots,” meaning they form a single thick root that grows deep into the soil and has smaller, lateral branches.

The correct order of increasing impedance is:

C. PZT, gel, skin, matching layer

Impedance is a measure of the opposition to the flow of sound waves in a medium. It depends on the density and speed of sound in the material. In the given options, the order of increasing impedance can be determined by considering the properties of the materials involved.

PZT (lead zirconate titanate) has a higher impedance than gel, skin, and the matching layer. PZT is a piezoelectric material commonly used in ultrasound transducers and has a higher density and speed of sound, leading to higher impedance.

Gel has a lower impedance compared to PZT but higher impedance than skin and the matching layer. Gel is used as a coupling medium between the transducer and the skin to enhance acoustic coupling and minimize impedance mismatch.

Skin has a lower impedance than both gel and the matching layer. It is the outermost layer and acts as an interface between the transducer and the biological tissue.

The matching layer has the lowest impedance among the given options. It is designed to match the impedance of the PZT to the impedance of the tissue being imaged, facilitating efficient sound transmission.

Therefore, the correct order is C.

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Answer:

19.2 m/s

Explanation:

From the question,

Velocity = displacement/time = d/t

V = d/t.................................. Equation 1

Average velocity = Total displacement/ total time

Total dispalcement = √(30²+60²) = √4500 = 67.08 m

Total time = 1.5+2 = 3.5 s.

Substitute these value into equation 1

V = 67.08/3.5

V = 19.2 m/s.

Hence the average velocity is 19.2 m/s

The parameter given for the car during transit is 30 m north in 1.5 seconds and drives 60 east in 2 seconds, we want to find the average velocity.

average velocity is 19.2 m/s

Solution

The expression for Average velocity is

Average velocity = Total Displacement/ Total time Taken...............Eqn 1

Total Displacement = √(30²+60²) = √4500 = 67.08 m

Total time = 1.5+2 = 3.5 s.

From the Equation 1

Average Velocity = 67.08/3.5

V = 19.2 m/s.

Therefore, the average velocity is 19.2 m/s

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The distance between each speed bump should be approximately 0.00556 miles or 29.3 feet (assuming a standard length of 14 feet for each speed bump).

To ensure that a car traveling at 10 miles per hour over several bumps will bounce more and more violently with each bump, we need to place the speed bumps at regular intervals that coincide with the natural period of the underdamped harmonic oscillator.

The natural period of the oscillator is given as 2 seconds. To convert this to miles per hour, we need to use the formula:

v = d ÷ t

where v is the velocity, d is the distance, and t is the time.

d = v × t

where d is the distance, v is the velocity (10 miles per hour), and t is the time (the natural period of the oscillator, 2 seconds).

Substituting the values, we get:

d = 10 × 2 ÷ 3600

d = 0.00556 miles

To convert 0.00556 miles to feet, we can use the conversion factor

1 mile = 5280 feet:

0.00556 miles × 5280 feet/mile = 29.2848 feet

Therefore, 0.00556 miles is approximately equal to 29.3 feet.

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Given that an air rocket is fired vertically into the air, lets solve for the following:

(b), At the highest height, the velocity of the rocket will be zero

The rocket's velocity will be zero when it gets to its highest height.

(c) The acceleration of the rocket during its flight will be the negative of the acceleration due to gravity.

This is because, as the rocket goes up, the force of gravity acts on the rocket.

Therefore, the acceleration of the rocket is -9.8 m/s².

ANSWER:

(b) The velocity is zero when it get's to its highest point.

(c) -9.8 m/s²

Answer:

Hence, option (A) is correct answer.

Explanation:

The distance in mm between these minima is 0.29 ×\(10^{-3}\) m

For first minima, m=1, Then,

\(a\sin \theta_1 = \lambda_1 \Rightarrow \sin\theta_1 = \frac{\lambda_1}{a} \Rightarrow \theta_1 = \sin^{-1}\left(\frac{589.1\times10^{-9}}{2.4\times 10^{-6}}\right) = 14.2^{\circ}\)

\(a\sin \theta_2 = \lambda_2 \Rightarrow \sin\theta_2 = \frac{\lambda_2}{a} \Rightarrow \theta_2 = \sin^{-1}\left(\frac{589.6\times10^{-9}}{2.4\times 10^{-6}}\right) = 14.22^{\circ}\)

Hence the required angle is , (14.22 - 14.2) = 0.02o

The distance between these two minima,

\(\Delta y = y_2 -y_1 = \frac{D}{a}\left( \lambda_2-\lambda_1\right) = \frac{1.4}{2.4\times 10^{-6}}\left(0.5\times 10^{-9} \right ) = 0.29\times 10^{-3} \hspace{2mm} m\)

This distance is best measured using a microscope.

The length of a particular path taken by an object between two points is its distance, such as the distance traveled through a maze. In some cases, such as when a ball is thrown straight up or the Earth completes an orbit, this can even be a closed distance along a closed curve that begins and ends at the same location. The mathematical term for this is the curve's arc length. It is also possible to signify the distance traveled: a "ahead" distance is positive and a "backward" distance is negative.

When building vehicles or mechanical gears, it can be helpful to take circular distance—the distance covered by a

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Answer: False

Explanation: You'll be able continuously tell a blend, since each of the substances can be isolated from the group in numerous physical ways. You'll be able continuously get the sand out of the water by sifting the water absent. Some of the time a blend partitioned on their possess eg. water & cooking oil.

The bike's velocity after 5.0 s when a motorcyclist of mass 60 kg rides a bike of mass 40 kg is 10m/s

Given mass of motorcyclist (m) = 60kg

mass of bike (m2) =40kg

Force exerted on bike (F) = 200N

Assuming that the total force on the bike remains constant.

Time taken (t) = 5s

Velocity of bike = v

We know that from newtons laws of motion F = Ma where a is the acceleration. v = u+at where u is the initial velocity = 0. Then a = v/t

So F = Mv/t

Here M be total mass = m1+m2

Then Fnet = (m1+m2) x v/t

v = F x t/(m1+m2) = 200 x 5/(40+60) = 10m/s

Hence Velocity of bike = 10m/s

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Answer:

Kepler's three laws of planetary motion can be stated as follows: (1) All planets move about the Sun in elliptical orbits, having the Sun as one of the foci. ... (3) The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the Sun.

Answer

30 kg . m/sec

Explanation:

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True

In place of photographic plates or films, charge coupled devices, or CCDs, are sensitive photon detectors that can be employed in telescopes to create images. CCDs were created in the late 1960s and are now found in various devices, including digital cameras and photocopiers.

CCDs are more light-efficient, catch a greater proportion of incoming photons, can store and transfer digital data, and don't require development like film does. They respond linearly and capture up to 80% of the light that strikes them.

I understand the question you are looking for is this:

One of the primary advantages of CCDs over photographic plates is the former's high efficiency in detecting light. True or false.

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B is the correct answer

The orbital speeds would fall off sharply with increasing distance from the galactic center.

The plot of radial distance versus the orbital speed of objects gives us the galaxy rotation curve. The theoretical and practical curves have significant differences. A possible explanation for this difference could be the existence of dark matter.

According to the theoretical calculations, the curve should increase sharply and then decrease as the radial distance increases. The theoretical graph does not take the dark matter into account. But the plot made by observations shows the plot increasing first and then becoming constant as the radial distance increases.

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Answer:

I. 56

II. c is the speed of light in vacuum.

III. 385.180×10¯²⁷ Kg.

Explanation:

I. Determination of the value of p.

²³⁸₉₂U + ¹₀n —> ¹³⁹ₚBa + ⁹⁷₃₆Kr + 3 ¹₀n

92 + 0 = p + 36 + 3(0)

92 = p + 36

Collect like terms

92 – 36 = p

56 = p

Therefore, the value of p is 56

II. Determination of the meaning of c

ΔE = Δmc²

In the Einstein's equation above,

E => is the energy

m => is the mass

c => is the speed of light in vacuum.

III. Determination of the total mass of the element formed after the reaction.

From the reaction above, the elements formed after the reaction are:

Barium–139 and Krypton–97. Thus, we can obtain the total mass of the elements formed as follow:

Mass of Ba–139 = 232.560×10¯²⁷ Kg

Mass of Kr–97 = 152.620×10¯²⁷ Kg

Total mass =?

Total mass = mass of Ba–139 + mass of Kr–97

Total mass = 232.560×10¯²⁷ + 152.620×10¯²⁷

Total mass = 385.180×10¯²⁷ Kg

It is a 2:1 ratio of ey, final, the maximum value of the y-component of the electric field immediately following the last polarizer, to eo, the amplitude of the electric field oscillations in the incident polarized beam.

What is a ratio?

A ratio is the divisional comparison of two numbers.

We may find the ratio by dividing the second output by the first output, which corresponds to the first two outputs, or -1/8 and -1/4:

-1/4-1/8

We multiply by the reciprocal when dividing fractions:

-1/4x-8/1

When multiplying fractions, multiply across the board:

(-1x-8)/(4x1) 8/4=2

A ratio is a comparison of two or more numbers in mathematics that shows how big one is in comparison to the other. A ratio divides two amounts into equal parts, with the dividend or antecedent serving as the unit of comparison and the divisor or unit of comparison serving as the unit of comparison.

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3. An electronics company is manufacturing circuit boards.They want to use minimum wire to connect the pins in a way that there are exactly two connected components of any size.

The wire needed to connect each pair of pins is given by the distance between them. How should they arrange the pins to minimize the total length of wire needed?

To minimize the total length of wire needed, the electronics company can use a specific arrangement of pins known as a "Minimum Spanning Tree" (MST). A Minimum Spanning Tree is a connected subgraph of the original circuit board graph that includes all the pins while minimizing the total length of the edges (wires) used.

The company can follow these steps to determine the optimal pin arrangement:

1. Create a graph representation of the circuit board, where each pin is represented by a vertex and the distance between two pins is represented by the weight of the edge connecting them.2. Apply a suitable algorithm for finding the Minimum Spanning Tree of the graph, such as Kruskal's algorithm or Prim's algorithm.

3. The resulting Minimum Spanning Tree will provide the arrangement of pins that minimizes the total length of wire needed while ensuring that there are exactly two connected components of any size.

By using this approach, the electronics company can achieve an efficient and optimized wiring configuration for their circuit boards.

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The speed at which the other car is travelling is 27.71 m/s.

The speed of the second car is calculated as follows;

f₂ = f₁(v + v₁)/(v - v₂)

where;

600 = 512(345 + 26.8) / (345 - v₂)

600/512 = (345 + 26.8) / (345 - v₂)

1.1718 = 371.8/(345 - v₂)

345 - v₂ = 371.8/1.1718

345 - v₂ = 317.289

v₂ = 345 - 317.289

v₂ = 27.71 m/s

Thus, the speed at which the other car is travelling is 27.71 m/s.

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The velocity of the car is: 15.24m/s.

To have the same momentum as a 2280kg pickup truck traveling at 21m/s to the east, a car with a mass of 1370kg must have a velocity of 15.24m/s to the east.

This can be calculated using the formula for momentum, which is:

Thus, we can rearrange the equation to solve for v: v = p/m.

Substituting in the values given, we get: v = (2280kg * 21m/s)/1370kg = 15.24m/s.

Velocity is a vector quantity that describes the rate and direction of an object's motion. It is the speed of an object in a particular direction and is usually expressed in units such as meters per second (m/s).

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The vertical velocity of the projectile upon returning to its original is 17. 74 m/s

Using the formula:

Vertical velocity component , Vy = V * sin(α)

Where

V = initial velocity = 36. 6 m/s

α = angle of projectile = 29°

Substitute into the formula

Vy = 36. 6 * sin ( 29°)

Vy = 36. 6 * 0. 4848

Vy = 17. 74 m/s

Thus, the vertical velocity of the projectile upon returning to its original is 17. 74 m/s

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The bright-line emission spectrum of an element can best be explained by the electrons transitioning between the discrete energy levels in the atoms of that element.

The electron is a subatomic particle with a bad standard electric charge. Electrons belong to the primary technology of the lepton particle's own family and are typically thought to be fundamental particles because they have no recognized additives or substructure.

For most realistic purposes, an electron is a structureless particle with an intrinsic angular momentum or spin. simply two numbers — the electron's mass and its electric price — gasoline the equations that describe its behavior. From this 'sensible electron' version, physicists constructed present-day microelectronics.

By using the best values for the wavelength and the scattering by a matter of tough X-rays and ?-rays, the radius of the electron is anticipated as approximately 2 × 10-10 cm.

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