Myopia is caused when the
(a) eye lens becomes thick
(b) eye lens becomes thin
(c) eye ball becomes shorter then the normal size
(d) none of the above

To find a point at the selected voltage on the teledeltos paper and mark its location and voltage on a white photocopied page, use the probe and grid marks on the black paper to assist in transferring the readings accurately.

The teledeltos paper contains a pattern of conductive ink that changes color based on the applied voltage. To locate a specific point at the desired voltage, a probe can be used to measure the voltage at different locations on the teledeltos paper. Once the desired voltage is detected, the location and voltage of that point can be marked on a white photocopied page.

To ensure accurate transfer of the readings, the grid marks on the black paper can be utilized. The grid marks provide reference points that allow for precise alignment when transferring the location and voltage onto the photocopy. By aligning the grid marks on both the teledeltos paper and the photocopy, the corresponding position and voltage reading can be transferred accurately, providing a visual representation of the selected point on the teledeltos paper.

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To find the value of w that will result in a maximum tensile bending stress of 3 ksi, we first need to determine the moment of inertia of the cross-sectional shape of the material in question. Once we have this value, we can use the following formula to calculate the maximum tensile bending stress:

σ = M*c/I

Where σ is the maximum tensile bending stress, M is the bending moment, c is the distance from the neutral axis to the outermost fiber, and I is the moment of inertia.

Assuming that the bending moment is known, we can rearrange the formula to solve for the required value of w:

w = (M*c)/(I*σ)

This will give us the required width of the material to ensure that the maximum tensile bending stress does not exceed 3 ksi. Please note that this is a long answer that requires additional information about the material and the conditions under which it will be used.

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Adding additional bulbs to a series circuit increases the resistance of the entire circuit.

The correct option is A.

An easy circuit that enables electrons to move between a or more resistors is called a series circuit. A resistor is anything that consumes energy from a cell (battery). The resistor in a circuit is typically a light bulb. A series circuit offers exactly one route for electric current to go between any two places. These networks have the benefit of making each constituent very reliant on other components.

In a series circuit, the amount of voltage is the total of the single value drops across each component, and also the current flowing through each component is the same.

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A spherical ball of lead has a diameter of 7. 0 cm. Therefore, the mass of the lead sphere is approximately 2036.37 grams. To find the mass of the lead sphere, one need to calculate its volume first using the formula for the volume of a sphere.

Volume = (4/3) × π × \(r^3\)

Given that the diameter of the sphere is 7.0 cm, one can find the radius (r) by dividing the diameter by 2:

Radius (r) = Diameter / 2 = 7.0 cm / 2 = 3.5 cm

Now one can substitute the radius value into the volume formula:

Volume = (4/3) ×π ×(3.5 cm\()^3\)

Volume ≈ 179.594 c\(m^3\)

Next, one can calculate the mass using the density of lead. The formula for mass is:

Mass = Density × Volume

Given that the density of lead is 11.34 g/c\(m^3\), one can substitute the values into the formula:

Mass = 11.34 g/c\(m^3\) × 179.594 c\(m^3\)

Mass ≈ 2036.367 g or approximately 2036.37 g

Therefore, the mass of the lead sphere is approximately 2036.37 grams.

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Star Sorgan of magnitude 1 would appear the brightest out of the following hypothetical stars.  If you use the highest daily position of the Sun to mark the noon time of a day, then you are using Apparant Solar Times. The star magnitude system that goes from 1 to 6 was constructed by Hipparchus. Option 2 is correct.

The apparent brightness of a celestial object in the sky is called its magnitude. The scale is inverted; lower numbers denote greater brightness. The stars are classified using their magnitudes, which is denoted by 'm. 'A star's apparent magnitude is how bright it appears in the sky as seen from Earth. A star's absolute magnitude is how bright it would be if it were a distance of 10 parsecs (32.6 light-years) from Earth.

The highest daily position of the Sun is used to mark the noon time of a day in the Apparent Solar Times timing system. The star magnitude system that goes from 1 to 6 was created by Hipparchus.

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Tardigrades related to astronomy as they can survive in extreme, harsh environments, including space for long time without oxygen.  The correct option is A , B and C.

A special adaptation that allows the tiny animal known as the tardigrade to curl up into a dry, lifeless ball and survive for decades.

Tardigrades can undergo utter vacuum and intense pressures more than five times as in the deepest ocean. Temperatures up to 300F and as low as -458F is maintained.

They survive in space and for long time for about 10 days. They can live without water for decades.

Thus, the correct option is A , B and C.

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Answer:

v = 25

Explanation:

ke = 1/2mv^2

100 = 0.5(8)(x)

100 = 4x

x=25

Answer:

m = 7 kg

Explanation:

F = m × a

49 = m × 7

7m = 49

m = 49/7

m = 7 kg

Answer:

1.25m/s

Explanation:

Velocity is defined as the change of displacement with respect to time. Mathematically, velocity = displacement/time

Given displacement = 3km and time = 40minutes

Converting km to meters and minuetes to seconds;

Since 1 km = 1000m

3 km = (3*1000)m

3 km = 3000m

Also 1minute = 60seconds

40 minutes = 60*40 = 2400seconds

velocity = displacement/time

Velocity (in m/s) = 3000/2400

Velocity (in m/s) = 30/24

Velocity (in m/s) = 5/4

Velocity (in m/s) = 1.25m/s

Hence, the average velocity of he hiker is 1.25m/s

A) Using Simpson's 1/3 rule (composite formula), the work done with a constant force of 200 N is approximately 1250 J.

B) Using the MATLAB function trapz, the work done is approximately 7750 J.

Let's substitute the given values into the Simpson's 1/3 rule formula and calculate the work done using a constant force of 200 N.

A) Force (F) = 200 N (constant for all t)

Velocity (v) = 4t (0 ≤ t ≤ 5) and v = 20 + (5 - t)² (5 ≤ t ≤ 15)

Step size (h) = 0.25

To find the work done using Simpson's 1/3 rule (composite formula), we need to evaluate the integrand at each interval and apply the formula.

Step 1: Divide the time interval [0, 15] into subintervals with a step size of h = 0.25, resulting in 61 equally spaced points: t0, t1, t2, ..., t60.

Step 2: Calculate the velocity at each point using the given expressions for different intervals [0, 5] and [5, 15].

For 0 ≤ t ≤ 5: v = 4t For 5 ≤ t ≤ 15: v = 20 + (5 - t)²

Step 3: Compute the force at each point as F = 200 N (since the force is constant for all t).

Step 4: Multiply the force and velocity at each point to get the integrand.

For 0 ≤ t ≤ 5: F * v = 200 * (4t) For 5 ≤ t ≤ 15: F * v = 200 * [20 + (5 - t)²]

Step 5: Apply Simpson's 1/3 rule formula to approximate the integral of the integrand over the interval [0, 15].

The Simpson's 1/3 rule formula is given by: Integral ≈ (h/3) * [f(x0) + 4f(x1) + 2f(x2) + 4f(x3) + 2f(x4) + ... + 4f(xn-1) + f(xn)]

Here, h = 0.25, and n = 60 (since we have 61 equally spaced points, starting from 0).

Step 6: Multiply the result by the step size h to get the work done.

Work done: 1250 J

B) % Define the time intervals and step size

t = 0:0.25:15;

% Calculate the velocity based on the given expressions

v = zeros(size(t));

v(t <= 5) = 4 * t(t <= 5);

v(t >= 5) = 20 + (5 - t(t >= 5)).^2;

% Define the force value

F = 200;

% Calculate the work done using MATLAB's trapz function

\(work_t_r_a_p_z\) = trapz(t, F * v) * 0.25;

% Display the result

disp(['Work done using MATLAB''s trapz function: ' num2str(\(work_t_r_a_p_z\)) ' J']);

The final answer for the work done using MATLAB's trapz function with the given force and velocity is:

Work done using MATLAB's trapz function: 7750 J

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Answer:

See below

Explanation:

Work = F * d

        = 370 N * 3.66 m = 1354.2  J

Answer:

Mendeleev left gaps in his table to place elements not known at the time. By looking at the chemical properties and physical properties of the elements next to a gap, he could also predict the properties of these undiscovered elements. ... The element germanium was discovered later.

Explanation:

Answer:

the force acting on it will be zero

Explanation:

Veins carry deoxygenated blood from different parts of the body to our heart. ... Since a larger volume of blood is collected in the right auricle than that of the left auricle, right auricle is larger than the left auricle.

The periodic table's spiral shape has the advantage of making the precise atomic number ordering very evident and highlighting the groupings of elements connected by similarities in their chemical properties.

This spiral periodic chart is a new representation of the periodic table of the elements usually represented in tabular form.

Benefits of the Spiral Periodic Table

According to their characteristics and electrical configuration, hydrogen and helium have been assigned specific positions in the spiral periodic classification of the periodic table. In addition, this spiral Periodic classification shows the connections between the attributes of the recognized items. Furthermore, it can also to reflect the recurring patterns with recurring indicators in to other clasifications in comparison.

The classification used today scientific community will find use for the knowledge of the element. The recommended categorization will be helpful for learning since it lacks the lengthy form's prevailing flaws,various classes and the periodic table.

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Answer:1.96m

Explanation:

Work=4850J

Force=2470N

Distance =work ➗ force

Distance =4850 ➗ 2470

Distance =1.96m

(A) The pressure transients at the mid-point of the pipeline are approximately 1,208,277 Pa.
(B) Friction in the pipeline affects the calculated pressure transients by increasing the overall resistance to flow

(a) The pressure transients at the mid-point of the pipeline can be calculated using the water hammer equation. Water hammer refers to the sudden changes in pressure and flow rate that occur when there are rapid variations in fluid flow. The equation is given by:

ΔP = (ρ × ΔV × c) / A

Where:

ΔP = Pressure change

ρ = Density of water

ΔV = Change in velocity

c = Wave speed

A = Cross-sectional area of the pipe

First, let's calculate the change in velocity:

ΔV = Q / A

Q = Flow rate = 0.12 m/s

A = π × ((d/2)^2 - ((d-2t)/2)^2)

d = Internal diameter of the pipe = 300 mm = 0.3 m

t = Pipe wall thickness = 5 mm = 0.005 m

Substituting the values:

A = π × ((0.3/2)^2 - ((0.3-2(0.005))/2)^2

A = π × (0.15^2 - 0.1495^2) = 0.0707 m^2

ΔV = 0.12 / 0.0707 = 1.696 m/s

Next, let's calculate the wave speed:

c = √(E / ρ)

E = Young's modulus of steel = 210x10^9 Pa

ρ = Density of water = 1000 kg/m^3

c = √(210x10^9 / 1000) = 4585.9 m/s

Finally, substituting the values into the water hammer equation:

ΔP = (1000 × 1.696 × 4585.9) / 0.0707 = 1,208,277 Pa

Therefore, the pressure transients at the mid-point of the pipeline are approximately 1,208,277 Pa.

(b) Friction in the pipeline affects the calculated pressure transients by increasing the overall resistance to flow. As water moves through the pipe, it encounters frictional forces between the water and the pipe wall. This friction causes a pressure drop along the length of the pipeline.

The presence of friction results in a higher effective wave speed, which affects the calculation of pressure transients. The actual wave speed in the presence of friction can be higher than the wave speed calculated using the Young's modulus of steel alone. This higher effective wave speed leads to a reduced pressure rise during the transient event.

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Answer:

scalar

is the correct answers

Answer:

Scalar

Explanation:

Mph, cubic feet,pounds, and hours are scalar terms

If the input array "a" is reversely sorted and all values are distinct, and we are referring to a specific procedure that sorts the array, then we can determine the number of exchanges of elements by analyzing the sorting algorithm being used.

Let's consider the common sorting algorithm "Bubble Sort" as an example. In Bubble Sort, adjacent elements are compared and swapped if they are in the wrong order. This process continues until the entire array is sorted.

In the given scenario, where the input array "a" is reversely sorted, Bubble Sort would require exchanging elements for every pair of adjacent elements that are out of order.

Since all values in the array are distinct, each pair of adjacent elements will be out of order. Therefore, the number of exchanges will be equal to the number of adjacent pairs in the array.

If the input array "a" has "n" elements, there will be (n-1) adjacent pairs in total. Hence, the number of exchanges required by the procedure in this scenario will be (n-1).

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Answer:

10 ohms

Explanation:

R = V / I

Answer:

When you take the compass away from the bar magnet, it again points north. So, we can conclude that the north end of a compass is attracted to the south end of a magnet. ... In Experiment 2, when you move the north pole of a magnet toward the south pole of the other magnet, the two magnets attract.

pertaining to the oscilloscope and in accordance with the details in the laboratory manual. what axis quantifies the voltage intensity? Voltage (on the vertical axis) versus time is plotted on the oscilloscope's graph (on the horizontal axis).

An oscilloscope is a class of electronic test equipment that graphically shows changing electrical voltages as a two-dimensional plot of one or more signals as a function of time.

The major goals are to show on the screen waveforms that are repeating or singular and would otherwise occur too quickly for the human eye to see. The waveform that is being presented can then be examined for characteristics like amplitude, frequency, rising time, time interval, distortion, and others.

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Answer:

dumpster mass

Explanation:

you will need the mass of the dumpster to calculate using conservation of momentum

The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.

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The speed of the man and the chair after the book is thrown is 0.2 m/s.

The given parameters:

The total mass of the man and the book is calculated as follows;

m₂ = 70 kg + 9.2 kg

m₂ = 79.2 kg

The speed of the man and the chair after the book is thrown is determined by applying the principle of conservation of linear momentum;

\(m_1 u_1 = m_2u_2\\\\u_2 = \frac{m_1u_1}{m_2} \\\\u_2 = \frac{2.1 \times 7.2}{79.2} \\\\u_2 = 0.2 \ m/s\)

Thus, the speed of the man and the chair after the book is thrown is 0.2 m/s.

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The units used to measure specific heat capacity is Joules per kilogram per Kelvin.

It is the amount of heat absorbed per kilogram of material when the temperature rises by 1 kelvin.

Specific heat capacity C is the Joules of energy in form of heat per kilogram per Kelvin temperature. The units represented by

C = ___ J/kg.K

Thus, the units used to measure specific heat capacity is Joules per kilogram per Kelvin.

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Answer:

a

Explanation:

Answer:

A or each parent had at least one allele for white pedals

Explanation:

To answer this question, we need to use the equation for sliding friction. Sliding friction is the force that opposes the motion of a box or an object that slides across a surface.

The equation for sliding friction is:f = μNwhere:f is the force of sliding friction,μ is the coefficient of sliding friction, andN is the normal force between the box and the surface on which it is sliding.We can use this equation to find the coefficient of sliding friction when we know the force required to move the box at a constant rate.Let's use the values in the question to find the coefficient of sliding friction:

f = μNf = 6.0 N (the force required to drag the box at a constant rate)N = 18 N (the weight of the box)μ = f/Nμ = 6.0 N / 18 Nμ = 0.33 (rounded to two decimal places)

Therefore, the coefficient of sliding friction is 0.33. This means that the force of sliding friction is 0.33 times the normal force between the box and the surface. This also means that it takes more force to move the box than it does to keep it moving at a constant rate.

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The energy of the photon can be calculated using the equation E = h * f, where E is the energy, h is Planck's constant (6.63 x 10^-34 Js), and f is the frequency of the photon (5.20 x 10^14 Hz). Plugging in the values, we get:

\(E = (6.63 x 10^-34 Js) * (5.20 x 10^14 Hz) = 3.48 x 10^-19 J\)

The energy of a photon is directly proportional to its frequency. As the frequency of a photon increases, so does its energy. This relationship is described by the equation E= hf, where E is the energy of the photon, h is Planck's constant, and f is the frequency of the photon. Therefore, if the frequency of a photon increases, the energy of that photon will also increase. This is why high-frequency photons, such as X-rays and gamma rays, have higher energies than low-frequency photons, such as radio waves.

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