The conventional system of signs that indicate relative durations of long and short sounds is called.

Answer:

False

Explanation:

Physical properties can be measured without changing the composition of the substance. Physical properties of matter include color, hardness, malleability, solubility, electrical conductivity, density, melting point, and boiling point.

However, the chemical properties have to be measured by changing the composition of the substance.

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By using electromagnetic waves, the frequency of radiation is 3.09 x 10¹⁴ Hz.

We need to know about electromagnetic waves to solve this problem. Electromagnetic waves can propagate without media. The speed of electromagnetic in vacuum media is equal to the speed of light. Hence, the wavelength and frequency can be determined as

c = λ . f

where c is the speed of light (3 x 10⁸ m/s), λ is wavelength and f is frequency.

From the question above, we know that

λ = 970 nm = 970 x 10¯⁹ m

By substituting the given parameter, we can calculate the frequency of radiation

c = λ . f

f = c / λ

f = 3 x 10⁸ / 970 x 10¯⁹

f = 3.09 x 10¹⁴ Hz

Hence, the frequency of radiation is 3.09 x 10¹⁴ Hz.

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The mass of alcohol in one litre of the mixture is 371g

Let us assume the alcohol to be ethyl alcohol (C2H5OH) with the temperature being 20°C.

Given we have assumed this, the density of water and ethyl alcohol becomes,

ρa=789.45g/L

ρw=998.23gL

and then it is given that the density of the solution is ρs=900gL

We know that,

ρ= m/v

⇒ m=ρv

⇒m=ρs Vs = 900g

Then we see that the sum of the mass of ethyl alcohol and water is the same as 900g

But we are interested in finding the values keeping the volume as 1L

hence, Va +Vw =1

⇒ Vw = 1-Va

Then we know that

900g=Va(789.45g/L)+(1−Va)(998.23g/L)

so solving the equation for ethyl alcohol, we have.

Va = 0.4705 L

then to get the mass of ethyl alcohol,

ma= ρaVa

ma= (789.45g/L) (0.4705L)

ma= 371g

Thus, the mass of alcohol (ethyl alcohol) as calculated is 371g.

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The volume of balloon will be 1522.5 cubic liter.

We have a hydrogen stored inside a large weather balloon of given mass and density.

We have to calculate the volume of balloon.

The density and mass of body are related as follows -

M = ρV

where -

ρ - Density of Object.

M - Mass of Object.

V - Volume of Object.

According to the question →

Using the formula discussed above -

M = ρV

V = M/ρ

V = 135.5/0.089

V = 1522.5 cubic liter.

Hence, the volume of balloon will be 1522.5 cubic liter.

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The vector v with the given magnitude and the same direction as u. magnitude direction v = 4 u =< 1, 1>

=4/[tex]\sqrt2{^{2} }[/tex] i + 4/[tex]\sqrt2{^{2} }[/tex] j

Vector, in physics, a quantity that has both magnitude and the direction. It is a typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity’s magnitude. Although vector has magnitude and direction, it does not have the position. That is, as long as its length is not changed, vector is not altered if it is displaced parallel to itself.

In contrast to vectors, ordinary quantities that have a magnitude but not a direction are called the scalars. For example, displacement, velocity, and acceleration are vector quantities, while the speed (the magnitude of velocity), time, and mass are scalars.

To qualify as a vector, a quantity having magnitude and direction must also obey certain rules of the combination.

Therefore,

A vector a with given magnitude in the direction of b, is given by:

(||a||.b)/||b||

||u||=[tex]\sqrt{1^{2}+1^{2} }= \sqrt{2^{2} }[/tex]

||v||=4

[4(1+1)]/[tex]\sqrt{2^{2} }[/tex]= 4/[tex]\sqrt2{^{2} }[/tex] i + 4/[tex]\sqrt2{^{2} }[/tex] j

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The strength of this electric field is 10.64×10⁸ N/C.

Electric field strength is a quantitative expression of the intensity at a particular location of a electric field.

It is a vector quantity.

Electrostatic force on the  charge :

[tex]F_{e} = mg[/tex]          (equation1).

m = mass

g = gravity

electrostatic force of a charge on an electric field :

[tex]F_{e} = Eq[/tex]           (equation2).

E = magnitude of electric field

q = charge

using equation 1 and 2 we get

Eq = mg

m = 1.67×10⁻²⁷ kg

g = 10.2 m/s²

q = 1.6 ×10⁻¹⁹

E = mg/q

     =  1.67×10⁻²⁷ kg ×10.2 m/s² /  1.6 ×10⁻¹⁹ C

     E= 10.64×10⁸ N/C

The strength of this electric field is 10.64×10⁸ N/C.

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At speeds over 30 mph, you should maintain a following distance of at least three full seconds behind the vehicle ahead of you.

As a general rule and common sense at a speed of 30 mph you can leave three full seconds so that you can achieve a prudent distance between the car you are driving and the car in front in order to be able to perform some kind of maneuver if an accident or unforeseen event occurs.

To count the full three seconds you can use the technique of counting the Mississippis as follows: Mississippi one, Mississippi two, Mississippi three.

An accident is an unexpected event that generally causes damage, injury or negative consequences.

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The frequency of the beat they produce when playing together in their fundamental is 82.29 Hz

From the question we are told that:

Initial pipe length L 1 = 1.03 m

Final pipe length L 2 = 1.03 + (2 x 10^-2) = 1.05 m

The frequency of a repeated event is its number of instances per unit of time. It is also sometimes referred to as ordinary frequency to contrast angular frequency with ordinary frequency and temporal frequency to stress the comparison to spatial frequency.

Generally the equation for Frequency f is mathematically given by

F = v/λ

λ = 4 L and V = speed of sound in air = 343 m/s

F = v/4*1/L1 - 1/L2 = 343/4*1/1.03 - 1/1.05

F = 82.29 Hz

Hence, Frequency of the beat produce is 82.29 Hz

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The correct answer No the velocity is not zero anywhere For an object being launched at ground level at a tilted non-zero initial velocity, and horizontal or vertical components of the velocity is zero at maximum height .

Because velocity is a vector (it has magnitude and direction), the overall velocity of an object can be calculated by adding the x and y components: v2 = vx2 + vy2. Meters are used to express horizontal and vertical distances (m). The horizontal velocity component (vx) describes the effect of velocity on horizontal displacement of the projectile.

The vertical velocity component (vy) describes the effect of velocity on vertical displacement of the projectile. The vertical component of a projectile's velocity is momentarily zero (vy = 0 m/s) when it reaches maximum height. The horizontal component of its velocity, however, is not zero.

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The density of a fish is controlled by the expansion and contraction of its air sacs while the density of a submarine is controlled by ballast tanks. It was emphasized earlier that buoyant forces does not equal an objects weight but does equal the weight of displaced water.

The three most fundamental characteristics of an object are mass, volume, and density. Volume indicates something's size, mass indicates how heavy it is, and density is calculated as mass divided by volume. Although you deal with mass and volume on a daily basis, the concept of density is less clear-cut and requires careful consideration.

Mass divided by density equals volume; and. Volume times density equals mass. A liquid's density is a gauge of how heavy it is relative to the amount being measured. The liquid that weighs heavier is more dense if you weigh two liquids with similar volumes or amounts.

The relationship between a substance's mass and the amount of space it occupies is known as its density (volume). The density of a substance is determined by the mass, size, and arrangement of its atoms.

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Lamar's average velocity is 1 m/s

We know that,

Average Velocity = Total distance travelled / Total time taken

Given that,

Distance travelled west = 20 m

Distance travelled East = 20 m

Total time taken = 40 s

Total distance travelled = 20 + 20 = 40 m

Average Velocity = 40 / 40 = 1 m/s

Average velocity is total rate of change of displacement.

Therefore, Lamar's average velocity is 1 m/s

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Answer: 311.483

Explanation:

(101°F − 32) × 5/9 + 273.15 = 311.483K

The magnitude of the magnification for converging lens is 3

Converging lens is convex lens whereas diverging lens is a concave lens.

Given:

distance of object from converging lens = 6.0 cm

focal length = 9.0 cm

To Find:

magnitude of the magnification

Solution: Magnification is the ability of a microscope to produce an image of an object at a scale larger (or even smaller) than its actual size.

Magnification (m) = h / h' Here, h is the height of the object and h' is the height of the object. Besides, it can also be related to the object distance and image distance. So, it can be written as: m = -v/u

Using the formula for magnitude of magnification

1/f = 1/d° + 1/di

M = - d1/d° = 3

Hence, magnitude of the magnification is 3

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Gold foil experiment

Ernst Rutherford conducted the Gold Foil Experiment in which α particles (doubly charged Helium Atoms) were bombarded on a thin gold foil. This experiment led to the discovery of the nucleus.

1) Most of the particles passed through undeflected

⇒ this meant that most of an atom is empty space

2) Some Alpha particles were deflected by some small angles

⇒ Since alpha particles are positively charged species , they can only be deflected if there are some positively charged atoms present that would repulse these particles.

3) A few ( about 1/20000 particles) bounced back

⇒There is a heavy mass of positively charged species in the atom , and since the alpha particles bounced back , this mass of positively charged species must have been highly dense.

Therefore, from these observations and inferences Rutherford concluded that most of an atom is empty space and there is a mass of positively charged particles in the center of the atom called the nucleus which contains protons. The electrons revolve around this nucleus at high speeds.

The mass of the atom is concentrated in the nucleus and is very small in size , making it highly dense.

The emission power of sun is 3.868 * [tex]10^{26}[/tex] W

We know that,

Energy flux on earth = Emission power of sun / 4 π [tex]r^{2}[/tex]

where,

r = Distance between sun and earth

Given that,

Energy flux on earth = 1368 W / [tex]m^{2}[/tex]

Diameter of sun = 1.39 * [tex]10^{9}[/tex] m

Diameter of earth = 1.27 * [tex]10^{7}[/tex] m

r = 1.5 * [tex]10^{11}[/tex] m

Emission power of sun = 1368 * 4 * 3.14 * ( 1.5 * [tex]10^{11}[/tex] [tex])^{2}[/tex]

                                      = 1368 * 2.828 * [tex]10^{23}[/tex]

Emission power of sun = 3.868 * [tex]10^{26}[/tex] W

Energy flux is the rate of transfer of energy through a surface. The unit of total rate of energy transfer is W = J / s. The unit of specific rate of energy transfer is W / [tex]m^{2}[/tex] = J / [tex]m^{2}[/tex] s

Therefore, The emission power of sun is 3.868 * [tex]10^{26}[/tex] W

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The average velocity is 1 km/hr.

Velocity is the speed of a body in a given direction.

Velocity can also defined as the displacement of body with time.

The average velocity will be be the ratio of the total displacement with time.

Taking the right direction as positive and the direction to the left as negative:

displacement of the body = (4.0 - 2.5) km

displacement of the body = 1.5 km

Average velocity = 1.5 km/ 1/5 hours

Average velocity = 1 km/hr

In conclusion, the average velocity is obtained from the displacement and time taken.

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The height has to change by a factor of 1.

We can obtain the height from which the object falls using the equations of kinematics under gravity. We can see that the object was dropped from a height thus u = 0 m/s.

We can the write;

v= √2gh

h1 = v^2/2g

When the final velocity is doubled, we have;

2v= √2gh

h2 =4v^2/2g

h2 = 2v^2/g

The height changes by;

2v^2/g - v^2/2g = v^2/g

Thus the height has to change by a factor of 1.

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When the total debt ratio is 0.36, the debt-equity ratio is 0.5625.

The debt-to-equity ratio is a financial metric that shows how much debt and shareholder equity were utilized to finance the assets of a company. The ratio, often known as risk, gearing, or leverage, is closely related to leveraging. The debt-equity ratio serves as a gauge for how equally creditors and owners or shareholders contributed to the capital used by the company. The debt-equity ratio is the simple ratio of all long-term debt and equity capital in the company. The debt-to-equity ratio is calculated by dividing a company's total liabilities by the sum of its shareholders' equity. For the majority of businesses and industries, a desirable debt-to-equity ratio is around 2.0. A high debt-to-equity ratio shows that a business is using more market capital to finance its operations, whereas a low debt-to-equity ratio shows that the business is making better use of its assets and using less market capital. The debt-to-equity ratio is often higher in the capital industries.

Total Debt ratio = Debt/Asset

Hence, Debt=0.36*Total Assets

Assets = Debt*Equity

Hence Equity=(1-0.36)*Total Assets=0.64*Total Assets

So, Debt-Equity Ratio=Debt/Equity

=0.36Total assets/0.64Total assets

=0.5625

⇒Debt-Equity Ratio=0.5625

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The resultant vector is 5.2 cm at a direction of 12⁰ west of north.

The resultant of the two vectors is calculated as follows;

R = a² + b² - 2ab cos(θ)

where;

R² = (3.7)² + (4.5)² - (2 x 3.7 x 4.5) cos(78)

R² = 27.02

R = 5.2 cm

θ = 90 - 78⁰

θ = 12⁰

Thus, the resultant vector is 5.2 cm at a direction of 12⁰ west of north.

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One of the fundamental general safety guidelines is to keep the work area clear of combustibles for at least 35 feet from the hot work area.

Hot works or combustible works such as welding, heating or cutting should be done at a location which is far away form any combustible material.

Prior to start working in such a location make sure there are no hazardous or combustible material around such as fire, ignition source or electric spark.

All precautionary measures must be taken to confine heat, fire or spark so that they don not come into contact with nay combustible object.

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Answer: Concentration of H+ =10^-7; log of 10^-7=7 so pH=7

Explanation:

He is discussing Bargaining Power of Buyers competitive force.

What do you understand by  leverage?

The employment of various financial instruments or borrowed cash, or leverage, is an investing strategy that aims to improve an investment's potential return. The level of debt a company utilizes to finance its assets is another definition of leverage.

It offers a range of funding options so that the company can reach its desired earnings. Leverage is a crucial investing strategy because it enables businesses to establish a ceiling for the growth of their operations.

Leverage can be used, for instance, to support financially a new business. Purchasing fixed assets or borrowing money in the form of a loan from another business or person can serve as examples of leverage.

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Two or more vectors are equivalent if they have same magnitude and direction.

Vectors are formed by joining tail with head and forming an arrow in the direction of head.

Lets find each of these vectors.

(i) v1= (position vector of Q)-(position vector of P)

 = (4i+4j)-(2i+4j)= 4i+4j-2i-4j=2i

v1= 2i

if a vector V= xi+yj

then the length of vi =2i

length of v1=2

(ii )v2= (position vector of Q)-(position vector of P)

(i=3j)-(-i+3j)= i+3j+i-3j=2i

v2= 2i

length of v2= 2

(iii)  v3= (2i+4j)-(-i+3j)= 2i+4j+i-3j

v3= 3i+j

length of v3= [tex]\sqrt{10}[/tex]

(iv) v4= (6i+3j)-(4i+j)= 6i+3j-4i-j

Length of v4= [tex]\sqrt{8}[/tex]

Two vectors are equivalent if they have same magnitude and direction.

Clearly vectors V1 and V2 have same magnitude and they have same direction as represented of their sketch.

Hence vectors V1 and V2 are equivalent.

Magnitude is a term used to describe size or distance. We can relate the magnitude of the movement to the size and movement speed of the object. The magnitude of a thing or an amount is its size.

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In essence, yes. Despite the fact that the majority of people believe software architecture and design to be distinct.

A system's architecture outlines its main parts, their connections (structures), and how they work together. There are several contributing variables to software architecture and design, including business strategy, quality attributes, human dynamics, design, and IT environment.

Software Architecture and Software Design can be divided into two separate stages: Software Architecture and Software Design. The functional needs in architecture cast and separate nonfunctional considerations. Functional needs are fulfilled in design.

A system's architecture acts as a blueprint. It establishes a communication and coordination mechanism among components and offers an abstraction to control the complexity of the system.

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Answer:

20cm

It is one of the characteristics of a plane mirror that, the distance of the plane mirror from the object is equal to its distance from the image. Therefore, given distance between object and mirror = 10cm. Distance between mirror and image = 10cm. Thus, the distance between object and image = 10 + 10 = 20cm.

Explanation: :0

According to the given statement The current in the primary coil is 8 A.

Coil that is a component of an electrical circuit and which, when its current changes, causes a current to flow through a nearby circuit. primary and primary winding are synonyms kind of coil. Device that adds inductance to a circuit and is made of of a spiral of insulated wire.

AC electricity enters the primary coil here Where the current is induced to carry out any sort of energy transfer is in the secondary coil. In this instance, a light bulb is lit by the current. Transformers come in a variety of designs.

Here,

Number of turns in the primary , np = 100 turns

Number of turns in the secondary , ns = 400 turns

Current in the secondary , Is = 2 A

let the current in the primary coil be Ip

Ip * nP = Is * ns

100*np = 400*2

np = 8 A

The current in the primary coil is 8 A.

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Venus is observed to orbit the sun every 0.62 years so the semi-major axis of venus's orbit is 0.73 au.

Celestial mechanics uses curved trajectory objects to describe orbits, such as a planet's orbit around a star, a natural satellite's orbit around a planet, or an artificial satellite's orbit around a planet, moon, asteroid, or Lagrange point. A circle, a whole circle's revolution, or a range of experiences are all examples of what is meant by an orbit. As an example, consider the earth's orbit around the sun. An illustration of how long an orbit or full circle around takes is the 365 days it takes the earth to travel around the sun. The planets are kept in their orbits by the gravity of the Sun. Since no other force in the Solar System can halt them, they remain in their orbits.

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The scale is said to be reliable but not valid.

A person weighing 100 pounds is expected to return the same weight on mounting a scale, measuring 200 pounds means the scale is probably uncalibrated. However, when the person steps off and climbs back and the scale still shows 200 pounds this means the scale is reliable but not valid. The scale would have been rendered unreliable and invalid if it returns a different weight of the person. Hence, the scale is working but needs to be calibrated properly. It is also probable that the scale had been earlier set to 100 pounds which explains the reason for a doubled result.

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The runner that runs in a 5.00 km race at a steady 3.0 m/s takes 27.78 min to finish the race

The formula and procedure we will use to solve this problem is:

v = x/t

Where:

Information about the problem:

By converting the distance units from (km) to (m) we have:

5.00 km * (1000 m / 1 km) = 5000 m

Applying the velocity formula and isolating the time, we get:

v = x/t

t = x/v

t = 5000 m / 3.0 m/s

t = 1666.67 s

By converting the time units from (s) to (min) we have:

1666.67 s * (1 min / 60 s) = 27.78 min

It is a physical quantity that indicates the displacement of a mobile per unit of time, it is expressed in units of distance per time, for example (miles/h, km/h).

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