38. Which of the following is true about all or non-rule?
A) Can be applied on whole heart.
B) Minimal stimulus produces minimal response.
C) A minimal stimulus produces a maximal response.
D) The nerve trunk either responc maximally or not respond at all.
E) The response in a single nerve fiber increases with increase intensity of
stimulus.

The energy sources come from the sun. We get solar heat energy from the sun.

The energy of the sun is the primary source of most of the energy found on earth. and sunlight can also be used to make electricity from solar (photovoltaic) cells. The sun heats the earth's exterior and the Earth heats the air above it, beginning wind.

Solar energy is created by nuclear fusion that takes a spot in the sun. Fusion happens when protons of hydrogen atoms fiercely collide in the sun's core and fuse to generate a helium atom. This procedure, known as a PP (proton-proton) chain reaction, emits an enormous quantity of energy.

So we can conclude that We get solar heat energy from the sun, and sunlight can also be used to make electricity from solar.

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The maximum angle that the magazine rack can be tilted without falling over depends on its centre of gravity, base width, and the surface it is resting on.

To determine the maximum angle, you can use the formula:

tan(angle) = (centre of gravity height) / (base width/2)

Plugging in the values given, we get:

tan(angle) = 16cm / (5cm/2) = 16cm / 2.5cm = 6.4

The inverse tangent function (tan^-1) can be used to find the angle in degrees:

angle = tan^-1(6.4) = 72.9 degrees

So the maximum angle that the magazine rack can be tilted without falling over is about 73 degrees.

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Answer:

Explanation:

Sirs, when you pity us, I say You waste your pity. Let it stay, Well corked and stored upon your shelves, Until you need it for yourselves. We do appreciate God’s thought In forming you, before He brought Us into life. His art was crude, But oh, so virile in its rude Large elemental strength: and then He learned His trade in making men; Learned how to mix and mould the clay And fashion in a finer way. How fine that skilful way can be You need but lift your eyes to see; And we are glad God placed you there To lift your eyes and find us fair. Apprentice labour though you were, He made you great enough to stir The best and deepest depths of us, And we are glad he made you thus. Ay! we are glad of many things. God strung our hearts with such fine strings The least breath movces them, and we hear Music where silence greets your ear. We suffer so? but women’s souls Like violet powder dropped on coals, Give forth their best in anguish. Oh, The subtle secrets that we know, Of joy in sorrow, strange delights Of ecstasy in pain-filled nights, And mysteries of gain in loss Known but to Christ upon the Cross! Our tears are pitiful to you? Look how the heaven-reflecting dew Dissolves its life in tears. The sand Meanwhile lies hard upon the strand. How could your pity find a place For us, the mothers of the race? Men may be fathers unaware, So poor the title is you wear, But mothers -? Who that crown adorns Knows all its mingled blooms and thorns; And she whose feet that path hath trod Has walked upon the heights with God. No, offer us not pity’s cup. There is no looking down or up Between us: eye looks straight in eye: Born equals, so we live and die.

Source: https://pickmeuppoetry.org/to-men-by-ella-wheeler-wilcox/

If the dog walked at a constant speed the whole way, the graph of the dog's position versus time would be a straight line. This is because the dog's velocity (which is the derivative of position with respect to time) would be constant, and the acceleration (which is the derivative of velocity with respect to time) would be zero.

A straight line on a position-time graph indicates that the object is moving at a constant velocity. The slope of the line would be equal to the velocity of the dog.

If the graph is a horizontal line, it would indicate that the dog is at rest. If the line slopes upward, the dog is moving in the positive direction (for example, to the right in a position-time graph), and if the line slopes downward, the dog is moving in the negative direction.

In all, A constant speed means a constant velocity and the line is a straight line with a particular slope.

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230.4 gm of ethanol is produced in the conversion of ethanol to acetaldehyde and the molar mass of sugar is 180,16 g/mol.

Fermentation is a metabolic process that converts sugar to acids, gases or alcohol. It occurs in yeast and bacteria, and also in oxygen-starved muscle cells, as in the case of lactic acid fermentation. Fermentation is also used more broadly to refer to the bulk growth of microorganisms on a growth medium, often with the goal of producing a specific chemical product like enzyme, vaccines, antibiotics, food product/additive etc.

Pyruvate is CH3COCOO−  is inorganic phosphate. Two ADP molecules and two Pi are converted to two ATP and two water molecules via substrate-level phosphorylation. Two molecules of NAD+ are also reduced to NADH.

In oxidative phosphorylation the energy for ATP formation is derived from an electrochemical proton gradient generated across the inner mitochondrial membrane (or, in the case of bacteria, the plasma membrane) via the electron transport chain. Glycolysis has substrate-level phosphorylation (ATP generated directly at the point of reaction).

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92.14 gm ethanol will be produced, if 180.16 grams of sugar was used in the alcohol fermentation reaction.

Alcohol fermentation is the breakdown reaction of sugar in the absence of oxygen, to produce wine(ethanol) and carbon dioxide. Following reaction takes place:

C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂

Chemical formula of the sugar is C₆H₁₂O₆,

Chemical formula of ethanol is C₂H₅OH

Atomic weight of sugar = (12×6 + 12×1 + 16×6) =  180 gm/mole

Atomic weight of ethanol = (12×2 + 5×1 +16+1) = 46 gm/mole

180 gm of sugar makes one mole, which produces 2 moles of ethanol.

So the weight of ethanol produced will be 2 × 46.07 = 96.14 gm

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Answer: 7 newtons in the negative direction

Explanation:

If the directions measured are only negative and positive then the resultant should just be the addition of the two vectors.

Adding the vectors we have (+3N) + (-10N)

This gives us a final answer of (-7N) or 7 newtons in the negative direction

Answer:

To find the magnitude of a vector, you can use the Pythagorean theorem. In this case, the magnitude of the vector is given by:

sqrt((-22.2m)^2 + (12.6m)^2)

This simplifies to:

sqrt(486.24 + 159.96)

Which is equal to:

sqrt(646.2)

Which is approximately equal to:

25.4 m

So the magnitude of the vector (-22.2m, 12.6m) is approximately 25.4 m.

Explanation:

mark brainliest please thanks

The acceleration of the object is 4 m/s².

We know that, the relationship between velocity and acceleration

Acceleration (a) = Rate of change in velocity

or a = dv/dt

so, acceleration = slope of a velocity vs. time graph

a = [tex]\frac{v2-v1}{t2-t1}[/tex]

when t=0, v = 0 and when t = 5sec, v = 20 m/s

or a = [tex]\frac{20-0}{5-0}[/tex]

a = 4 m/s²

Therefore, the acceleration of the object is 4 m/s².

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Photosynthetic organisms that best absorb the wavelengths of light at depths of 25 and 100 meters are organisms with chlorophyll A and phycoerythrin.

Photosynthesis is the process by which organisms use sunlight to create energy. Sunlight is necessary for photosynthesis to take place, but only some parts of the light spectrum are actually useful. Only the visible light range (blue to red) is considered active in photosynthesis.

Phycoerythrin is a type of light reflector commonly found in red algae and cyanobacteria. This means it can help reflect red light, which is important for seeing in low-light conditions.

Chlorophyll which is green blue will reflect green and absorb red, because the red color spectrum has a long wavelength, and the blue color spectrum has great energy.

Red light has a wavelength of 630 – 700 nm and green light has a wavelength of 480 – 560 n. So that organisms with chlorophyll A and phycoerythrin can live in the ocean at depths of up to 100 meters.

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The potential difference across R1 is 8 V.

The total resistance of the circuit is calculated by applying the following equation as shown below.

Total resistance of R2 and R3 is calculated as follows;

1/R = 1/20 + 1/20

1/R = 1/10

R = 10 ohms

The total resistance of R1 , R4  and R2 , R3 combined is calculated as follows;

Rt = 10 Ω + 30 Ω + 10 Ω

Rt = 50 Ω

The total current flowing in the circuit is calculated as follows;

I = V / Rt

I = 40 V / 50 Ω

I = 0.8 A

The potential difference across R1 is calculated as follows;

V₁ = IR₁

V₁ = 0.8 A  x 10 Ω

V₁ = 8 V

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Star C will have the shortest maximum wavelength with a wavelength of 3.623 x 10⁻⁷ m

According to Wien's Law, the maximum wavelength of a star's radiation depends on its temperature. The formula for Wien's Law is:

λ_max = 2.898 x 10⁻³ / T

where λ_max is the maximum wavelength in meters, and T is the temperature in Kelvin.

Plugging in the temperatures for the three stars:

Star A: λ_max = 2.898 x 10^-3 / 3000 = 9.66 x 10⁻⁷ m

Star B: λ_max = 2.898 x 10^-3 / 5000 = 5.796 x 10⁻⁷ m

Star C: λ_max = 2.898 x 10^-3 / 8000 = 3.623 x 10⁻⁷ m

So, Star C would have the shortest maximum wavelength.

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The process through which UV light bleaches pigments, textiles, or other things is known as photo deterioration. UV radiation is used to disinfect surfaces, destroy microorganisms, and remove stains from clothing.

It is a chemical procedure that causes the fabric's molecules to disintegrate and release the natural oils by the application of ultraviolet light. By dissolving the fabric's molecules, releasing natural oils, and eradicating bacteria, it kills germs when applied to clothing. A colorant's lightfastness—a radiation that specifies how resistant it is to fading when exposed to light—can be described as a dye or pigment. Dyes and pigments are employed, for instance, in the production of paints and printing inks as well as the dying of fabrics, polymers, and other materials. Colorant molecules go through several chemical steps throughout the fading.

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Photo degradation is the process by which UV light bleaches textiles, pigments, and other materials. Surfaces are cleaned with UV radiation, which also eliminates bacteria and gets stains out of clothes.

By using UV light, a chemical process forces the fabric's molecules to break down and release its natural oils. When applied to garments, it kills germs by dissolving the fabric's molecules, releasing natural oils, and eliminating bacteria. An indicator of a colorant's lightfastness, also known as a dye or pigment, is how resistant it is to fading when exposed to light. For example, dyes and pigments are used to colour fabrics, polymers, and other materials in addition to producing paints and printing inks.

The majority of UVC rays are absorbed by the atmosphere's nitrogen, oxygen, and ozone, and the remainder are scattered, preventing them from reaching the earth's surface.

Skin lesions are brought on by UVC. During the fading process, colorant molecules go through a number of chemical processes.

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Answer:

a marble

Explanation:

If a black hole were to form from the Earth itself, it would create an event horizon just 1.7 centimeters in diameter.

Answer: A

Explanation:

Because of the law of conservation of momentum (total momentum of two golf balls must be constant).

To find the volume of a box, simply multiply length, width, and height.

Formula of volume:

volume is length × width × height.

Units of Measure:

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The correct answer is option D, which specifies that while putting out a fire in stacked and piled materials, use hooks or pike poles to pull the materials apart prior to dousing the area.

Putting out the fire with Class A foam or water until it has fully died down. In physics, a force is a factor that has the potential to change an object's trajectory. In reaction to a force, a mass-containing object can accelerate or modify its velocity by, for instance, moving away from rest. Force can logically be described as pushing or pulling. A force has both magnitude and direction, making it a vector quantity. Using the SI system, it is written as a newton (N). There is material in all things.

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Correct answer:- (d)  use hooks or pike poles to break apart material.

When attacking the fire in stacked and piled materials, use hooks or pike poles to break apart material, then apply water or Class A foam until extinguished.

A mixture of artificial stabilizers, foaming agents, fluorochemicals, and synthetic polymers are used to create alcohol-resistant (AR) foam, which is intended for use with polar solvents. These foams are resistant to being destroyed by polar solvents due to their chemical composition.

The very effective foam known as aqueous film-forming foam (AFFF, or alcohol-resistant AR-AFFF) is used to put out high-hazard liquid fires.

Class A: Consists of common combustibles like rubber, paper, wood, and plastic. Pressurized water, foam, or multipurpose dry chemicals are the most often used extinguishing agents.

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The maximum speed of a 2.0 g particle that oscilates between x= 2.00 mm to x = 8.00 mm is 70.71 m/s.

Speed is the ratio of distance to time of a body.

To calculate the maximum speed of the particle, we use the formula below.

Formula:

Where:

From the Graph in the question,

Given:

Substitute these values into equation 1

Hence, the maximum speed is 70.71 m/s.

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The electric flux through the surface shown in the figure is  2.6 Nm²/C.

The electric flux through the surface shown in the figure is calculated as follows;

Ф = E A cosθ

where;

The area of the surface is calculated as follows;

A = 10 cm x 10 cm

A = 0.1 m x 0.1 m

A = 0.01 m²

The electric flux through the surface shown in the figure is calculated as;

Ф = 300 x 0.01 cos30

Ф = 2.6 Nm²/C

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GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

GFHFG

The average force the beam exerts on the pile driver while the pile driver is brought to rest is 878 KN.

The word "force" has a specific meaning in science. At this level, calling a force a push or a pull is entirely appropriate. A force is not something an object "has in it" or that it "contains." One thing experiences a force from another. There is no distinction between living and non-living things in the concept of a force.

The newton, abbreviated N, is the SI unit of force. The force-relevant base units are The symbol for the length unit known as the meter is m. the kilogram (kg), is a unit of mass. The sign for the unit of time is s or the second.

Given:-

Mass (m) = 2100Kg

The distance it moves the pilling (h) = 0.12 m

The distance over which the driver falls freely (d) = 5.00 m

[tex]F=\frac{(mg)(h+d)}{d}[/tex]

Substitute values,

Where, g = 9.80 m/s^2

[tex]F=\frac{(2100kg)(9.80m/s^2)(0.12m+5.00m)}{0.12m}[/tex]

[tex]F=\frac{(2100kg)(9.80m/s^2)(5.12m)}{0.12m}[/tex]

[tex]F= 8.78*10^5N[/tex]

[tex]F=878KN[/tex]

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When the monitoring instrument develops an inability to average, steps need to be taken including all except C: 'Consult with the anesthesiologist anesthesia changes'.

Anesthesiologists are medical doctors like family doctors and surgeons. They specialize in pain management, anesthesia care, and critical care medicine as well as have the knowledge vital to understanding and treating the human body as a whole.

So when the monitoring instrument develops an inability to average, there is no need to consult with the anesthesiologist. The required steps that need to be taken would  include:

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a. traction

If your vehicle has a high center of gravity or if the surface traction is less than ideal, it is important to enter a curve slower than the posted speed. This is because vehicles with a high center of gravity or poor surface traction are more prone to instability and are more likely to roll over or lose control when negotiating sharp turns or curves at high speeds.

Traction refers to the friction or grip between the tires of a vehicle and the road surface. Poor surface traction can be caused by a variety of factors, such as wet or slippery roads, loose gravel or debris, or worn or damaged tires. When surface traction is poor, it becomes more difficult for the tires to maintain contact with the road and to transmit the forces of acceleration, braking, and steering to the road.

By entering a curve slower than the posted speed, you can reduce the lateral forces acting on your vehicle and give your tires more time to grip the road. This can help you maintain control and stability, and reduce the risk of accidents or injuries. It is important to always adjust your speed and driving style to suit the conditions of the road and the capabilities of your vehicle.

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The snapshot of the graph is captured at time =3seconds.

A graph can be defined as a pictorial representation or a diagram that represents data or values in an organized manner.

In the first graph , we are given two waves approaching each other with speed 1m/s.

In the second graph, we have a snapshot of some future instance of the first graph

If we compare both graphs, we have that

initial point of left wave on x axis is at x = 0 in the first graph

initial point of the wave on x axis is at x = 3. in the second graph

And the wave is moving towards right with speed of 1m/s.

So we can conclude that it must have taken 3 seconds for this initial point to travel from x = 0 to x = 3.

Therefore the snapshot is captured at time=3seconds

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Answer:

scalar

Explanation:

it has only magnitude and no direction (vector has both)

Zero, At the highest point, the speed is zero, and the acceleration due to gravity is g = 9.8 milliseconds (-2).

As a result, when it returns to you, it will be traveling in the opposite direction and at the same speed as when you tossed it upward. As a result, by the time it returns to your level, it will have completed the same action on the ball that you tossed downward and will produce the same outcome.

A ball progressively loses speed as we toss it upward. This is so that anything that rises will fall due to the gravitational pull of the earth. So

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Magnetic Field:

A magnetic field is the vector field that depicts how the magnetic force is distributed within or around a certain magnetic substance. The magnetic field, which consists of closed loops, travels from the North Pole to the South Pole.

Given Data:

The charge on the proton is:

q = 1.6 × 10⁻¹⁹ C

The mass of the proton is:

m = 1.67 × 10⁻²⁷ Kg

The distance by which the magnetic field extends is:

D = 0.44 m

The velocity of proton in x direction is:

vₓ = 5.1 × 10⁵ m/s

The velocity of proton in y direction is:

v = 2.7 × 10⁵ m/s

Answer and Explanation:

(1):The expression for the resultant velocity when the proton enter the magnetic field is,

[tex]v = \sqrt{v_{x^2} +v_{y^2}}[/tex]

Substitute the values in above expression.

[tex]v = \sqrt({5.1 * 10^{5} m/s} )^{2} + ({2.7 * 10^{5} m/s} )^{2}[/tex]

[tex]v = 5.8 * 10^{5} m/s[/tex]

Thus, the resultant velocity when the proton enter the magnetic field is [tex]v = 5.8 * 10^{5} m/s[/tex]

(2): The expression for the angle of inclination of proton is,

tanΘ =  [tex]\frac{v_{x} }{v_{y} }[/tex]

Substitute the values in above expression.

tanΘ =  [tex]\frac{2.7 * 10^{5 }m/s }{5.1 * 10^{5} m/s}[/tex]

= tan⁻¹(0.53)

Θ= 27.92°

The expression for the radius of curvature is,

[tex]R = \frac{D}{sin \theta}[/tex]

Substitute the values in above expression.

R= [tex]\frac{0.44 m}{sin 27.92}[/tex]

R≈ 0.94 m

Thus the radius of curvature is 0.94 m

(3): The expression for the y coordinate of proton is,

[tex]h = R -\frac{D}{tan \theta}[/tex]

Substitute the values in above expression.

[tex]h = 0.94 m -\frac{0.44 m}{tan \ 27.92}[/tex]

[tex]h=0.11 m[/tex]

Thus, the y coordinate of proton is 0.11 m

(4): The expression for the z component of the magnetic field is,

[tex]B_{z} =\frac{m*v}{q*R}[/tex]

Substitute the values in above expression.

[tex]B_{z} =\frac{(1.6 * 10^{-27 }kg) *(5.8*10^{5}m/s ) }{1.6*10^{-19} *0.94 m}[/tex]

[tex]B_{z} =6.44 * 10^{-3} kg/C.s[/tex]

Thus, the z component of the magnetic field is [tex]6.44 * 10^{-3} Kg/C.s[/tex]

(5): The radius of curvature would rise by the same amount if the velocity were increased because R varies linearly with v. The angle of incidence also lowers as the radius of curvature increases. The displacement h likewise decreases as the angle narrows.

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The geologic time scale divides the earth's history according to the kinds of life that existed at specific times before the planet was created.

The coach walks to work.

The band director rides a motorcycle.

The principal drives a car.

The science teacher rides a bike.

The security guard has a guard dog.

The lights are on because the security guard has a guard dog.

Geoscientists use the geological time scale to name events and rocks according to their relative ages. They do this by separating the most important events in Earth's history based on how much changed in rocks and fossils.

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Answer:

The correct answer is Exosphere. This is the uppermost layer of the atmosphere. It extends from the top of the thermosphere up to 10,000 km (6,200mi)

Thrusters on a spacecraft work in the vacuum of space as there is nothing for the thrusters to push against because since there is no atmosphere in space, the exhaust gases can exit much easier and faster, thus increasing the thrust.

This is referred to as a type of mechanical force which moves an aircraft through the air.

Air tends to inhibit the exhaust gases getting out of the engine on earth and reduces the thrust but in space since there is no atmosphere, which is therefore the reason why the exhaust gases can exit much easier and faster, thus increasing the thrust.

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The resultant of the vectors is equivalent to 28.1 meters at an angle of 27.5° with " - x axis ".

Given is that you walk 25m straight west and then 13m straight north.

The resultant of the vectors is equivalent to -

D² = D(x)² + D(y)²

D² = (25 x 25) + (13 x 13)

D² = 794

D = 28.1 meters

tan {Ф} =  D(y) / D(x)

tan {Ф} = 13/25

{Ф} = tan ⁻¹(13/25)

{Ф} = 27.5°

Therefore, the resultant of the vectors is equivalent to 28.1 meters at an angle of 27.5° with " - x axis ".

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