Write down the names of three mar-made devices in everyday use that depend,
for their action, upon the moments of forces.

There are 2 electrons generated from the oxidation of one water molecule.

The process of a substance interacting with oxygen or losing electrons from chemical species under the influence of light is known as photooxidation. Photooxidation happens in plants when there is environmental stress. It is called photooxidative stress as a result. Reactive oxygen species are produced by the absorption of excess excitation energy in plant tissues. Chloroplasts are harmed by the accumulation of these reactive oxygen species, which is a damaging process in plants. High-intensity light and little [tex]CO_{2}[/tex] are the two conditions that cause this photooxidative stress to occur most frequently. It is a procedure that requires light. Photorespiration in [tex]C_{3}[/tex] plants guards against photooxidation.

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Moles of disulfur decafluoride are present in 3.46 grams of this compound is 0.025 mol

There are 6.022 x 10^23 S2F10 units in one mole

There are 6.022 x 10^23 S2F10 units in one mole of the stuff by definition.

And thus 1.55 x 10^22 molecules/6.022 x 10^23 molecules mol^-1 =~ 0.025 mol

S2F10 is nasty stuff, though apparently it is quite odourless (this is a "good" property in a war gas, because some punter might get a lethal dose of it before he realizes he has been gassed; the substance has never been deployed in war).

A mole can be defined as the amount of substance that contains the same number of chemical entities (atoms, ions, molecules, etc.) as there are in 12 g of Carbon-12 isotope, as defined by the General Conference on Weights and Measures.

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First, it depends on the cross-sectional/frontal area of the falling object, that is the amount of air the object must plow through as it falls. Second, it depends on the speed of the falling object.

When an object is dropped through the air, it usually faces air resistance. Air resistance is caused by collisions between the object's leading air and surface molecules. Several variables determine the actual degree of air resistance the object faces. The object's speed and the frontal area of the object are the two predominant factors that have a direct effect on the amount of air resistance. Increased speeds cause an increase in air resistance. Increased cross-sectional areas lead to increased air resistance.

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If the top and bottom surfaces of the glass plates are parallel to each other, the incident and emergent beam will be parallel to each other no matter the wavelength (colour) of beam.

Refractive index is the lights bending ability when moving from one medium to another. Refractive index varies with colours but not angle of incidence and emergence.

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The liquid at the top is the one with a density of 0.79 g/ml.

The matter with most density will stay at the bottom of the graduated cylinder. So when comparing the three given densities of 1.15 g/ml, 0.79 g/ml and 0.95 g/ml, the lowest density is 0.79 g/ml.

Density is nothing but weight of the matter. So basically the lighter one stays at top.

Therefore, the liquid at the top is the one with a density of 0.79 g/ml.

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Voltage drop is a better measurement of resistance than testing static resistance because: current flow creates heat which adds to circuit resistance

The current flow or electric current is the measure of the electrons flow around a circuit. It is measured in amperes or "amps". If the current is higher the electrons flow is greater.

The course of a conventional electric current in the external circuit is directed away the positive terminal and toward the negative terminal of the battery

Electricity or electrical energy is the energy that occurs due to the movement of electrons in the materials that are considered conductors.

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Two rocket ships approach a space station at 80% of the speed of light from opposite directions. each pilot observes the other ship approaching at 0.98 c the speed of light.

Speed of light, the rate at which light waves move through various substances. Specifically, the speed of light in a vacuum is presently calculated to be 299,792,458 meters per second. One of nature's basic constants is the speed of light.

American physicist Albert Michelson used an eight-sided spinning mirror system to conduct his research in the mountains of Southern California during the 1920s and produced one of the earliest accurate calculations of light's velocity.

It is given that

[tex]V_{AB} =\frac{V_{A} +V_{B}}{1+\frac{V_{A} V_{B} }{c^{2} } } \\V_{AB} =\frac{.8c+0.8c}{1+\frac{.8cX.8c}{c^{2} } } \\V_{AB} = 0.98c m/s[/tex]

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The percentage decomposed in the first order reaction is 69.8%.

Given: rate constant, k = 0.00702 sec -1

time, t = 7.1 s

Since the reaction is first order, we calculate using the formula below:

[A] = [A]₀ [tex]$$e^{(-kt)[/tex]

Where; [A] is the final concentration

[A]₀ is the initial concentration

Finding the ratio of final and initial concentration

[A]/[A]₀ =[tex]$$ e^{(-kt)[/tex]

Substituting the values:

[A]/[A]₀ = [tex]e^{(-0.00702 * 7.1)[/tex]

[A]/[A]₀ = [tex]e^{(-0.0498)[/tex]

[A]/[A]₀ = 0.9514

Percentage decomposed = [A]/[A]₀ [tex]*[/tex] 100%

Percentage decomposed = 0.9514 [tex]*[/tex] 100%

Percentage decomposed = 95.1 %

Therefore, the percentage decomposed in the first-order reaction is 95.1 %.

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When temperature of an object is increases then the objects atom gain kinetic energy and elastic potential energies.

Kinetic energy- It is the energy of an object due to its motion.

Example -  All moving object possesses kinetic energy due to their motion.

Elastic potential energy - it is the energy stored in a spring that has been stressed or compressed from its natural length.

Example - An Archers stretched bow.

Heat is a form of  both potential and kinetic energy.

Temperature helps in thermal expansion which result in higher collision between particles. It increases the kinetic energy of the molecule.

an object as its temperature increases then the object's atoms gain kinetic and elastic potential energies.

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With an increase in strain rate, ductility decreases and tensile strength increases. Option b. decreases, increases is the correct answer

The ductility of materials decreases as the strain rate rises. The reason is that the material exhibits brittle behaviour. Material increases in tensile strength.

Ductility: A material's ductility refers to its capacity to withstand plastic deformation or drawing without breaking. As a result, it provides information on how "soft" or pliable the material is.

Tensile strength: Maximum load a material can bear without breaking when it is stretched, divided by the material's initial cross-sectional area.

Therefore, option b. is the correct answer for the given question

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The average rate from 2.0 to 6.0 seconds in mol/L is 0.004025 mol/L.

Decomposition reactions are those in which a reactant undergoes reaction to form two or more products.

2AX2(g) -------> 2AX(g) + X2(g)

t1 = 2.0 s and t2 = 6.0 s

x1 = 0.0249 and x2 = 0.0088

Average rate of reaction:

Ra = ∆[x]/DeltaT = X2 - X1/t2 - t1

Ra = 0.0088 - 0.0249/6 - 2 = 0.004025 mol

Thus, the average rate is 0.004025 mol/L.

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By using uniform motion, the distance needed to stop at the red light is 54.36 m.

We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule

vt = vo + a . t

vt² = vo² + 2a . s

s = vo . t + 1/2 . a . t²

where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.

From the question above, we know that

a = -3 m/s²

vo = 65 km/h = 18.06 m/s

vt = 0 m/s

By using the second equation, we get

vt² = vo² + 2a . s

0² = 18.06² + 2(-3) . s

6s = 326.16

s = 54.36 m

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0.2 is the value of the marginal propensity to save (mps). The multiplier's value would be 5.

Briefing:

Multiplier = 1 / marginal saving propensity (MPS)

= 1 / 0.2

= 5.

The percentage of an overall salary increase that a customer spends on purchasing goods and services rather than saving is known as the marginal propensity to consume (MPC) in economics.

By dividing the change in consumer spending (C) by the change in disposable income (I), the MPC formula is created. Formula for the marginal propensity to consume is (C1 - C0) / (I1 - I0), where C0 is the initial amount spent by consumers.

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The electric field at 100cm is 5.39 x 10² N/C.

We need to know about the electric field to solve this problem. The electric field is the area affected by electric force. The magnitude of electric field at a distance from long infinite length and constant charge per unit length is given by

E = λ / (2πε₀d)

From the question above, we know that

λ = 30 nC/m

λ = 30 x 10¯⁹ C/m

d = 100 cm = 1 m

By substituting the given parameter, we get

E = λ / (2πε₀d)

E = 30 x 10¯⁹ / (2π . 8.85 x 10¯¹² . 1)

E = 5.39 x 10² N/C

Hence, the electric field at 100cm is 5.39 x 10² N/C.

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Answer: 20mm/s

Explanation: Maximum displacement in shortest time....

It will cost $68 to travel 975 kilometers for an automobile if the cost of gasoline is $2.75 per gallon.

This simple calculation can be explained as below calculation of the cost of driving such a distance is done by conversion of the distance into miles and multiplying such distance by $2.75.

First calculate the kilometers to miles.

975 kilometers is converted as 605.837 miles. Now the division of mileage of automobile will be calculated as,

Gasoline required = Distance travelled/ mileage

=605.837/24.5

=24.72 gallons of gasoline required.

Now we have to calculate the cost of gasoline.

Gasoline cost= gallons x cost per gallon

= 24.72 x 2.75

=$68

So, it is calculated that the cost of gasoline/ cost of driving is $68.0.

Hence, it would cost $68 to travel 975 kilometers for an automobile when the cost of gasoline is $2.75 per gallon.

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The initial velocity of particle is 7.568 m/s

Given:

acceleration = a = 6.14 m/s2

time = t = 0.300 s

final velocity = v = 9.41 m/s

To Find:

initial velocity = u

Solution: Velocity is the prime indicator of the position as well as the rapidity of the object. It can be defined as the distance covered by an object in unit time.

v = u + at

u = v - at = 9.41 - 6.14*0.3

u = 7.568 m/s

Hence, the initial velocity of particle is 7.568 m/s

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The corresponding frequency of infrared radiation of a wavelength of 970 nanometer (nm) is 3 x 10^14 Hertz.

The relation between the frequency and wavelength of a radiation is as follows:

c = f x λ

Here c = speed of light = 3 x 10^8 m/s

So, the frequency of a given wavelength can be calculated by applying the above formula,

Putting λ = 970 nm = 970 x 10^-9 m

3 x 10^8 m/s = f x 970 x 10^-9

f = 3 x 10^14 Hz.

Hence, the corresponding frequency of radiation of a wavelength of 970 nm is 3 x 10^14 Hertz.

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A typical galaxy contains 100 billion stars - its scientific notation is x 10^11 stars.

A world is a gravitationally bound arrangement of stars, heavenly leftovers, interstellar gas, residue, and dim matter. The word is gotten from the Greek galaxias, in a real sense 'smooth', a reference to the Smooth Way world that contains the Planetary group. Cosmic systems, averaging an expected 100 million stars, range in size from diminutive people with under a hundred million stars, to the biggest worlds known supergiant's with one hundred trillion stars, each circling its universe's focal point of mass. Our world, the Smooth Way, is normal: it has many billions of stars, enough gas and residue to make billions additional stars, and somewhere around tenfold the amount of dull matter as every one of the stars and gas set up. Also, it's completely kept intact by gravity. Like more than 66% of the known universes, the Smooth Way has a twisting shape.

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The position where the package strikes the ground is 136.3m.

Use the following kinematic equation;

h = vt + ¹/₂gt²

179 = 47t  +  ¹/₂(9.8)t²

179 = 47t + 4.9t²

4.9t² + 47t - 179 = 0

solve the quadratic equation using formula method;

a = 4.9, b = 47, c = -179

t = 2.9 seconds

X = vt

X = 47m/s x 2.9 s

X = 136.3 m

Thus, the position where the package strikes the ground is 136.3m.

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The space between the screen fringes will be closed if the complete apparatus is submerged in water.

The space between two consecutive bright spots (maximas, when constructive interference occurs), or two consecutive dark patches, is known as the fringe width (minimas, where destructive interference occurs). All of the fringes in Young's double-slit experiment are the same length. The formula yields the fringe width. β = λD/d. Because it depends on L, the spacings between various fringes get smaller as the slit distance gets bigger. Since the space between various fringes is wavelength dependent, increasing the light's wavelength also increases that separation.

In comparison to air, water has a shorter wavelength of light. Therefore, when the device is submerged in water, the fringe width will diminish.

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The vertical component of the initial velocity is [tex]v_{0y}[/tex] = ( y / t ) + [ ( 1/2) gt ]

The horizontal component of the initial velocity is [tex]v_{0x}[/tex] = x / t

We know that,

x = [tex]v_{0x}[/tex] t

y = [tex]v_{0y}[/tex] t - ( 1/2) g[tex]t^{2}[/tex]

where,

x = Horizontal displacement of the object

y = Vertical displacement of the object

g = Acceleration due to gravity

t = Time of motion

For horizontal motion there is constant velocity and for vertical motion there is uniform acceleration.

The vertical component of the initial velocity is given as

y = [tex]v_{0y}[/tex] t - ( 1/2) g[tex]t^{2}[/tex]

[tex]v_{0y}[/tex] t = y + ( 1/2) g[tex]t^{2}[/tex]

[tex]v_{0y}[/tex] = ( y/t ) + ( 1/2 ) gt

The horizontal component of the initial velocity is given as

x = [tex]v_{0x}[/tex] t

[tex]v_{0x}[/tex] = x / t

A projectile motion is the motion of an object thrown in air at some angle with the horizontal.

Therefore,

The vertical component of the initial velocity is [tex]v_{0y}[/tex] = ( y / t ) + [ ( 1/2) gt ]

The horizontal component of the initial velocity is [tex]v_{0x}[/tex] = x / t

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Equation 11.22  

[tex]E = \frac{n^{2}*h^{2} }{8ML^{2} }[/tex]

Heisenberg's uncertainty principle states that the position and momentum of microscopic moving particles cannot be determined simultaneously with accuracy or certainty.

Mathematical expression- ΔX×ΔP [tex]\geq[/tex] 4πh.

Momentum can be defined as the product of mass of the body and its velocity.

According to the equation 11.22, Energy (E) is depends upon the position (h) and mass (M) and also it is inversely proportional to the square of the length of the box (L), therefore it is not possible to calculate the exact value of energy using the above equation.

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Conceptual abilities are essential for top managers, but they are less important for mid-level managers and are not necessary for first-level managers. The value of these talents will increase as we go up the managerial ladder.

In general, conceptual abilities refer to the capacity to deal with ideas and concepts. Whereas technical skills are concerned with objects and human skills with people, conceptual skills are concerned with the capacity to work with ideas.

These are intellectual abilities, human abilities, and technological abilities. A manager's conceptual talents enable him or her to see the complete organisation as well as deal with ideas and the links between abstract notions. Human skills, also known as human connection skills, need communication and attention to interpersonal interactions.

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As magnification increases, field diameter decreases and objects at the periphery will no longer be in the visible field.

A lens is a piece of transparent material that is typically round in shape with two polished surfaces that are either convex (bulging) or concave on one or both sides (depressed). The curves almost always have a constant radius of curvature since they are spherical.

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The direction of the reaction force on the collar will be Non constrained motion direction .

ω = v / r

Since the cylinder is wrapped about the string, it rolls without slipping with respect to the string. The constraint  relationship to assure this kind of motion can be obtained by considering the relative velocity of the point on the  cylinder that is in contact with the string with respect to the string­­ it  should be zero.

The velocity of the center of the cylinder,

v = dy (t) / dt,  r and the  rotation rate of the cylinder, ω

We have to first find the velocity of the contact point relative to the center of the cylinder. Since this ignores the  translational motion of the entire cylinder with respect to the ground, we then need to add back in the cylinder's center­ of ­mass velocity to find the velocity of the contact point with respect to the ground.

So, v (contact) = ωr - v  where,

ω is the angular velocity

v is the linear velocity

r is the radius

ω = v / r

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When the cart travels towards the origin, the magnitude of its exact position reduces with time.

The cart will be at -2 m (origin) 2s later.

When the cart travels towards the origin, the magnitude of its exact position reduces with time.

The formula of speed is given as

S = d/t ................. (1)

Where S = speed of the cart,

d = distance covered by the cart over a certain time.

t = time taken to cover the distance.

Where d the subject of the equation,

d = St ................. (2)

Given: S = 2.0 m/s, t = 2.0 s

Substitute into (2)

d = 2(2)

d = 4 m.

From the above, the cart covered a distance of 4 m in 2s.

The exact position of the cart = Initial position - distance covered

x' = x - d ............ (3)

Where x' = exact position of the cart 2s later,

x = initial position of the cart, and

d = distance covered by the cart in 2.0 s

Given: x = 2.0 m, d = 4 m.

Substitute into (3)

x' = 2.0 - 4

x' = -2 m.

Therefore the cart will be at -2 m (origin) 2s later.

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Answer:

frequency

Explanation:

speed of light = constant = wavelength * frequency

                                                changing WL or F will change the other

An athlete runs  34.271 kilometer.

solution,

Here , 1 miles is equal to 1.6093 km

therefore,  an athlete runs  21.3 miles

The distance measured in kilometer of athlete preparing for a marathon is given as ,

1 mile = 1.6093 km

21.3 miles = 21.3 × 1.6093 km

21.3 miles =34.271 km

Therefore an athlete preparing for  a marathon runs 34.271 km.

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