The difference in arrival times of P and S waves at a seismic observatory can be used to calculate the distance to a quake but not the ____ from the station.

Answer:

Transduction.

Explanation:

Transduction is actually a process which involves the conversion of energies or messages from one kind to another. So in this case the transfer of light energy received by the eyes into the message for the brain is also called as transduction.

Answer:

In order to make this force twice as strong, F' = 2 F, the distance would have to be changed to half i.e. r' = r/2.

Explanation :

The electric force between two point charges is directly proportional to the product of charges and inversely proportional to the square of the distance between charges. It is given by :

[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]

r is the separation between charges  

[tex]F\propto \dfrac{1}{r^2}[/tex]

[tex]r=\sqrt{\dfrac{1}{F}}[/tex]

If F'= 2F

[tex]r'=\dfrac{1}{\sqrt{2F} }[/tex]

In order to make this force twice as strong, F' = 2 F, the distance would have to be changed to half i.e. [tex]r'=\dfrac{1}{\sqrt{2F} }[/tex]. Hence, this is the required solution.                                                                                    

Answer:

The maximum capacity of such cup is

2 × 3.142R^3/9×squareroot3

Explanation:

From the diagram in the attachment,

h= height of the cone, r= radius of the cone,R= radius of the original circular piece of paper

Using pythagorean theorem, we get

r^2+h^2=R^2 => r^2=R^2-h^2

Formular for the volume of a cone is given as V=1/3×(3.142)^2h

Substituting for r^2 when R is a constant

V=1/3(3.142)(R^2-h^2)h

V=1/3(3.142)(R^2-h^3)

V'=0=1/3(3.142)R^2-3h^2)

0=R^2-3h^2

h^2=R^2/3 => h=R/squareroot of 3

V"=1/3(3.142)(0-6)=-2×3.142×h

Negative shows that v is concave

V(R/squareroot of 3)=1/3(3.142)[R^2×R/squareroot 0f 3-(R/squareroot of 3)^3

V=2×3.142×R^3/9× squareroot of 3

To find the maximum capacity of a cone-shaped drinking cup made from a circular piece of paper of radius R, you need to use differential calculus to maximize the volume of the cone, derived from the formula V = (1/3)π*r²h, where r = R*(1- θ/2π) is the radius of the cone and h = sqrt[R² - r²] is its height.

The subject of this question is finding the maximum capacity of a cone-shaped drinking cup made from a circular piece of paper of radius R. To find the maximum capacity or volume of such a cup, we need to formulate the problem in terms of mathematical geometry. The volume of a cone, which in this case represents our drinking cup, is given by the formula V = (1/3)π*r²h, where r is the radius of the base circle (which will also be our R), and h is the height of the cone.

The cone is created by cutting out a sector and joining edges CA and CB on the leftover part of the circular paper. Let θ denote the angle of the sector that is cut out (in radians). Since we have subtracted this sector, the circumference of the top circle of the cone is now 2πR*(1-(θ/2π)) = 2πR*(1 - θ/2π) = 2πR - R*θ.

Setting this equal to the circumference of the top of the cone (2πR - R*θ = 2πr, where r is now the radius of the cone), we can solve for r in terms of R and θ: r = R*(1- θ/2π).

The slant height of the cone will be equal to the radius of the initial circular piece of paper, R. Using Pythagorean theorem, the height h of the cone can be expressed as h = sqrt[(R² - r²)] = sqrt[R²(1 - (1- θ/2π)²)].

Substituting the expressions for r and h into the cone volume formula, we get V = (1/3)π[R²(1- θ/2π)]²*sqrt[R²(1 - (1- θ/2π)²)]

This is an expression for the volume V of the cone-shaped drinking cup in terms of R and θ. The task now is to utilize differential calculus to find the maximum of this function V(θ), i.e., we need to find the value of θ (between 0 and 2π) that maximizes the volume V.

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Answer:

The uncertainty in the location that must be tolerated is [tex]1.163 * 10^{-5} m[/tex]

Explanation:

From the uncertainty Principle,

Δ[tex]_{y}[/tex] Δ[tex]_{p}[/tex] [tex]= \frac{h}{2\pi }[/tex]

The momentum P[tex]_{y}[/tex] = (mass of electron)(speed of electron)

                                = [tex](9.109 * 10^{-31}kg)(995 * 10^{3} m/s)[/tex]

                                = [tex]9.0638 * 10^{-25}kgm/s[/tex]

If the uncertainty is reduced to a 0.0010%, then momentum

                              = [tex]9.068 * 10^{-30}kgm/s[/tex]

Thus the uncertainty in the position would be:

                              Δ[tex]_{y} = \frac{h}{2\pi } * \frac{1}{9.068 * 10^{-30} }[/tex]

                              Δ[tex]_{y} \geq 1.163 * 10^{-5}m[/tex]

The uncertainty in location of the electron can be calculated using Heisenberg's Uncertainty Principle, which stipulates a product of the uncertainties in position and momentum to be at least half of reduced Planck's constant. Uncertainty in momentum is given as 0.0010% of the electron's momentum. Careful consideration of quantities and units is essential.

This question revolves around Heisenberg's Uncertainty Principle. According to this principle, the product of the uncertainty in the position, denoted by Δx, and the uncertainty in momentum, denoted by Δp, has a minimum value dictated by Planck's constant, h. Mathematically, it is represented as Δx * Δp ≥ ħ/2, where ħ is the reduced Planck's constant, ħ=h/(2π). The speed of the electron, v, is related to its momentum, p, through mass, m, as p=mv. Therefore, the uncertainty in momentum, Δp, can be calculated as 0.0010% of p. Once we find Δp, using the Uncertainty Principle, we can find the minimum required uncertainty in the electron's location, Δx. In such problems, considering mass and speed of electron and appropriate units for constants are crucial for

correct computation

. Make sure to consider them appropriately.

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Answer:

First law of thermodynamics.

Explanation:

The first law of thermodynamics states that the change in internal energy of a system ΔE equals to the amount of heat energy supplied to the system H  , minus the work done by the system on its surroundings. W.

The above definition can be expressed mathematically as: ΔE = H - W

This can also be restarted as energy of a close or isolated system is constant.

Answer:

c. 3

Explanation:

Given:

Since AMA i.e. actual mechanical advantage is defined as the ratio of the output force to the input force on a simple machine. This takes into account the losses occurred.

Now, mathematically:

[tex]AMA=\frac{F_o}{F_i}[/tex]

[tex]AMA=\frac{30}{10}[/tex]

[tex]AMA=3[/tex]

Answer:

kuh

Explanation:

Answer:

Kinetic

Explanation:

Final answer:

The weight of the closed system of propane is 173.04 N. The mass-based specific volume is 25 m³/kmol and 0.567 m³/kg.

Explanation:

To answer the student's question about the weight and the mass-based specific volume of a closed system of propane:

Propane has a molar mass of approximately 44.1 kg/kmol. Since the system has 0.4 kmol of propane, the mass (m) is:

m = 0.4 kmol × 44.1 kg/kmol = 17.64 kg

Now, the weight (W) in Newtons can be calculated using the gravitational acceleration (g = 9.81 m/s2):

W = m × g = 17.64 kg × 9.81 m/s2 = 173.04 N

The specific volume (vsp) in m3/kmol is simply the volume divided by the number of kmols:

vsp = V / n = 10 m3 / 0.4 kmol = 25 m3/kmol

For m3/kg, we divide the specific volume by the molar mass of propane:

vsp = 25 m3/kmol ÷ 44.1 kg/kmol = 0.567 m3/kg

Answer:

0.0072 m³/s

Explanation:

Using Bernoulli's law

P₁ + 1/2ρv₁² = P₂ + 1/2ρv₂ since the pipe is horizontal

1/2ρv₂² - 1/2ρv₁² = P₁ - P₂

flow rate is constant

A₁v₁ = A₂v₂

A₁ = πr₁² = π (0.06/2)² = 0.0028278 m²

A₂ = πr₂² = π (0.0225)² = 0.00159 m²

v₁  = (A₂ / A₁)v₂

v₁  = (0.00159 m²/ 0.0028278  m²) v₂ = 0.562  v₂

substitute v₁  into the Bernoulli's equation

1/2ρv₂² - 1/2ρv₁² = P₁ - P₂

500 ( 1 - 0.3161 ) v₂²  = (31.0 - 24 ) × 10³ Pa

341.924 v₂² = 7000

v₂² = 20.472

v₂ = √ 20.472 = 4.525 m/s

volume follow rate = 0.00159 m² ×  4.525 m/s = 0.0072 m³/s

[tex]0.0072 \;\rm m^{3}/s[/tex]The volume flow rate at the exit of the pipe is [tex]0.0072 \;\rm m^{3}/s[/tex].

Given data:

The  initial diameter of horizontal pipe is, d = 6.0 cm.

The final diameter of pipe is, d' = 4.5 cm.

The gauge pressure at inner section is, P = 31.0 kPa.

The gauge pressure at outer section is, P' = 24.0 kPa.

Applying the Bernoulli's concept, which says the total pressure energy and kinetic energy throughout the flow remains constant .

So, for the horizontal pipe, the expression is,

[tex]P + \dfrac{1}{2} \rho v^{2} = P' + \dfrac{1}{2} \rho v'^{2}[/tex] ............................................(1)

Here, [tex]\rho[/tex] is the density of water throughout the flow, which remains constant.

Now, apply the continuity equation as,

[tex]A\times v = A' \times v'\\\\(\pi/4 \times d^{2}) \times v = (\pi/4 \times d'^{2}) \times v'\\\\ d^{2} \times v = d'^{2} \times v'\\\\v/v' = 0.045^{2}/0.006^{2}\\\\v = 0.5625\times v'[/tex]

Now substitute the value in equation (1) as,

[tex]P -P' = \dfrac{1}{2} \rho v'^{2} - \dfrac{1}{2} \rho v^{2}\\\\(31 -24) \times 10^{3} \;\rm Pa = \dfrac{1}{2} \times 1000 v'^{2} - \dfrac{1}{2} \times 1000 (0.5625 v')^{2}\\v' = 4.52 \;\rm m/s[/tex]

Then the flow rate is calculated as,

[tex]Q' = A' \times v'\\\\Q' = (\pi /4) d'^{2} \times v'\\Q' = (\pi /4) \times 0.06'^{2} \times 4.52\\\\Q' = 0.0072 \;\rm m^{3}/s[/tex]

Thus, the required value of volume flow rate is, [tex]0.0072 \;\rm m^{3}/s[/tex].

Learn more about the Bernoulli's theorem here:

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Answer:

the Architect should use {!$FieldType.lead.accessible} expression within the Visualforce page.

Explanation:

Visualforce is a framework that allows developers to build complex,  user friendly interfaces that can be hosted primarily on the Lightning Platform

Controllers provide access to the data that should be displayed in a page, and can modify component behavior. a number of standard controllers are provided by The Lightning platform that contain  functionality and logic that which are used for standard Salesforce pages

The Architect should Use the expression {!$FieldType.lead.accessible}  within the Visualforce page.

To enforce Field-Level Security on a custom Visualforce page using the Standard Lead Controller, the Architect should define the page with the 'standardController' attribute set to 'Lead' and the 'extensions' attribute set to the appropriate Lead Controller extension. The 'with sharing' keyword should be used in the extension to enforce field-level security.

To ensure Field-Level Security is enforced on a custom Visualforce page using the Standard Lead Controller, the Architect should define the Visualforce page with the 'standardController' attribute set to 'Lead' and the 'extensions' attribute set to the appropriate Lead Controller extension. Within the extension, the Architect can use the 'with sharing' keyword to enforce field-level security.

For example:

The 'with sharing' keyword ensures that the Visualforce page adheres to the Org-wide default settings and user's record-level access. This means that any field-level security restrictions defined for the Lead object will be enforced on the page.

Answer:

1. What we calculate when we calculate expected frequency is the predicted frequency that can be obtained from an experiment whose outcome is expected to be true.

2. The reason for using expected frequency is because it is a tool used for doing complex probability calculations and predictions. Also, it serves as a working tool that can be used in place of the observed frequency,when the observed frequency is not available.

3. In probability, expected frequency tell us the possible outcomes of an event.

Say, for example rolling of a fair die.

The probability of getting 1,2....,6 as the outcome is 1/6 but that doesn't mean that when we roll a fair die 6 times, we'll get outcomes of 1-6.

So, the essence of expected frequency is to tell us what to expect in an event (this may or may not turn out to be true).

Final answer:

Expected frequencies estimate how often an event should occur based on a probability distribution, providing a basis for comparing actual outcomes in a data set to determine consistency with expected probabilities.

Explanation:

When we calculate expected frequencies, we are determining how often we anticipate an event will occur based on a probability distribution. To find the expected frequency, one typically multiplies the expected percentage by the total number of observations or the sample size. For instance, if an event has a 10% chance of occurring out of 600 trials, the expected frequency would be 0.10 * 600 = 60.

The reason for calculating expected frequencies in this manner is to provide a basis for comparison with the actual frequencies that occur in a data set. This comparison allows us to determine if the outcomes observed are consistent with the expected probabilities, which can be particularly useful in statistical hypothesis testing, such as the chi-square test.

Expected frequencies give us insight into what we might predict to occur over a long period of trials or observations. They are theoretical estimates that can be appraised against actual outcomes to understand the probability distribution of a given scenario.

Answer:

a. exhibits retrograde motion.

Explanation:

When earth catches up to a slower moving outer planets like for example Saturn and jupitar they seems to show the retrograde motion which is actually an illusion but there exits the real retrograde motion too in some cases. In retrograde motion planets appears to move in the backward direction like from east to west rather then from west to east in the sky.

Answer:

(a) [tex]\omega=2.09*10^{5}\frac{rad}{s}[/tex]

(b) [tex]A_{max}=0.033m[/tex]

Explanation:

(a) The angular frequency is defined as:

[tex]\omega=2\pi f[/tex]

Here f is the frequency of the particle, which is inversely proportional to its period:

[tex]f=\frac{1}{T}[/tex]

Replacing, we have:

[tex]\omega=\frac{2\pi}{T}\\\omega=\frac{2\pi}{3*10^{-5}s}\\\omega=2.09*10^{5}\frac{rad}{s}[/tex]

(b) The maximum displacement is given by:

[tex]A_{max}=\frac{v_{max}}{\omega}\\A_{max}=\frac{7*10^3\frac{m}{s}}{2.09*10^5\frac{rad}{s}}\\A_{max}=0.033m[/tex]

The lift in the wing is similar to the Bernoulli's equation. The pressure on the one side of the ball makes it to mover faster than the other side. In heart attack As the blood rushes through the constricted artery, the internal pressure  drops and again the artery closes.

Explanation:

The determination of the relation between the pressure, density and velocity at each point of a fluid can be done with Bernoulli's principle.The lift of the aircraft makes it to move forward and upward. This is achieved based on relationship between the angle of the wing and the turbulent flow that helps whether to increase or decrease the lift of the wing. This is similar to the Bernoulli's equation and hence they are associated with each other.  

A ball contains stitches on the middle. While a ball spins the pressure is induced by the ball stitches. This will increase the pressure to decrease one side when compared to the pressure of the other side of the ball. This enables it to move faster.  The pressure must be increased for maintaining a constant rate flow of blood in artery. Heart muscle is very essential factor for increasing this pressure. The person will have heart attach when there is dislodging of the plaque occurs.    

Answer:

[tex]x = x_{0}+v_{0}t+\frac{1}{2}at^{2}[/tex] equation gives the position at a specific time for an object with constant acceleration

Explanation:

[tex]x = x_{0}+v_{0}t+\frac{1}{2}at^{2}[/tex] equation gives the position at specific time for an object having constant acceleration. Constant acceleration is referred as the change of velocity with respect to the time is known as the acceleration, but when the velocity changes occurs at constant rate this rate is termed as the constant acceleration. The constant acceleration can never be zero. The velocity changes but that change occurs in the consistently. The acceleration is affected by the mass.

Answer:

A) pbin = 1.535 Kgm/s (+)

B) pbf = 1.696 Kgm/s (-)

C) Δp = 3.3925 Kgm/s

D) Δvr = 10.249 m/s

Explanation:

Given

Mass of the ball: m = 57.5 g = 0.0575 Kg

Initial speed of the ball: vbi = 26.7 m/s

Mass of the racket: M = 331 g = 0.331 Kg

Final speed of the ball: vbf = 29.5 m/s

A) We use the formula

pbin = m*vbi = 0.0575 Kg*26.7 m/s = 1.535 Kgm/s (+)

B) pbf = m*vbf = 0.0575 Kg*29.5 m/s = 1.696 Kgm/s (-)

C) We use the equation

Δp = pbf - pbin = 1.696 Kgm/s - (-1.535 Kgm/s) = 3.3925 Kgm/s

D) Knowing that

Δp = 3.3925 Kgm/s

we can say that

Δp = M*Δvr

⇒  Δvr = Δp / M

⇒  Δvr = 3.3925 Kgm/s / 0.331 Kg

⇒  Δvr = 10.249 m/s

Explanation:

The Vehicle Assembly Building at the Kennedy Space Center in Florida has a volume of 3,666,500 m³.

Volume = 3,666,500 m³

1 m³ = 1000 L

So volume = 3,666,500 x 1000 = 3666500000 L

Volume of vehicle Assembly Building at the Kennedy Space Center in Florida = 3666500000 L

Volume of vehicle Assembly Building at the Kennedy Space Center in Florida = 3.67 x 10⁹ L

The volume in liters and in exponential notation is [tex]3.67\times10^{23}[/tex].

To convert the given volume to liters it is necessary to use the following relation of values:

                                                    [tex]dm^{3} = L\\ m ^{3} = 1000L[/tex]

Therefore, the following calculation must be performed:

                                   [tex]3,666,500m^{3} \times 1000= xL[/tex]

                                        [tex]x = 3,666,500,000 L[/tex]

Now, to convert to scientific notation, leave the number different from the power of 10 between 1 and 10, so that:

                                  [tex]3,666,500,000 = 3.67 \times 10^{9} L[/tex]

So, the volume in liters and in exponential notation is [tex]3.67\times10^{23}[/tex]

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Answer:

[tex]\Delta x=0.002287\ m=2.287\ mm[/tex]

Explanation:

Given:

Now the radius of revolution of the ball:

[tex]r=l+\Delta l[/tex]

[tex]r=0.2+0.01[/tex]

[tex]r=0.21\ m[/tex]

Now in this case the centrifugal force is equal to the spring force:

[tex]F_c=F_s[/tex]

[tex]m.\frac{v^2}{r} =k.\Delta l[/tex]

where:

m = mass of the ball

k = spring constant

[tex]m\times \frac{3^2}{0.21} =k\times 0.01[/tex]

[tex]k=(4285.714\times m)\ N.m^{-1}[/tex]

Now the extension in the spring upon hanging the ball motionless:

[tex]m.g=k.\Delta x[/tex]

[tex]9.8\times m=(4285.714\times m)\times \Delta x[/tex]

[tex]\Delta x=0.002287\ m=2.287\ mm[/tex]

Final answer:

To find their rates of travel, represent Eric's rate as E and Stacy's as 5E. Since together they cover 336 miles in 4 hours, the equation 4E + 20E = 336 leads to Eric's rate of 14 mph and Stacy's rate of 70 mph.

Explanation:

Stacy and Eric travel in opposite directions and collectively cover 336 miles in 4 hours. Since Stacy travels 5 times as fast as Eric, we can set up equations to represent their speeds and use these to find the rates of travel for both.

Let E represent Eric's rate of travel. Then 5E represents Stacy's rate of travel. Since distance equals rate times time, we can set up the equation E x 4 hours + 5E x 4 hours = 336 miles.

Combining terms, we get 4E + 20E = 336, which simplifies to 24E = 336. Dividing both sides by 24 gives us E = 14. So, Eric travels at 14 miles per hour, and Stacy travels at 5 times that rate, which is 70 miles per hour.

Answer:

47628 kg/hr

Explanation:

Total area = 18*20 =360 ft^(2)

no .of snowflakes per minute = 1050*360 =378000

mass of snowflakes per minute = 378000*2.1*10^(-3) =793.8 kg/min

mass accumulated per hour = 793.8kg/min * 60min/hr =47628 kg/hr

Final answer:

The net charge within the cylinder, given the electric flux of -50 Nm²/C² and the permittivity of free space, is -44 picocoulombs (pC).

Explanation:

The question asks to determine the net charge within a cylindrical surface given the total electric flux and the electrical permittivity of free space. According to Gauss's law, the electric flux (φ) through a closed surface is equal to the net charge (Q) enclosed by the surface divided by the permittivity of free space (ε0). The formula is φ = Q / ε0. Given the electric flux is -50 Nm2/C2 and ε0 = 8.85 x 10-12 C2/Nm2, we can solve for Q:

Q = φ x ε0

Q = (-50 Nm2/C2)(8.85 x 10-12 C2/Nm2)

Q = -4.425 x 10-10 C

To convert this to picocoulombs (pC), we multiply by 1012 pC/C:

Q = -4.425 x 10-10 C x 1012 pC/C = -442.5 pC

The closest answer to -442.5 pC is -44 pC, so the correct answer is (d) -44.

To determine the distance between the two fluid levels of the manometer, we use the equation P = ρgh. For mercury, the density is 13,600 kg/m3, and for water, the density is 1000 kg/m3.

To determine the distance between the two fluid levels of the manometer, we need to consider two cases: one with mercury and one with water.

(a) For mercury, we can use the equation P = ρgh, where P is the pressure difference, ρ is the density of mercury, g is the acceleration due to gravity, and h is the height difference between the two fluid levels. Rearranging the equation, we have h = P / (ρg). Plugging in the values of P = 80 kPa, ρ = 13,600 kg/m3, and g = 9.8 m/s2, we can calculate the value of h in meters.

(b) For water, we can use the same equation P = ρgh, but with the density of water. Plugging in the values of P = 80 kPa, ρ = 1000 kg/m3, and g = 9.8 m/s2, we can calculate the value of h in meters.

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Final answer:

The racket is moving at a speed of 15 m/s immediately after the impact. The average force that the racket exerts on the ball is 0.189 N.

Explanation:

Part A:

To calculate the racket's speed immediately after the impact, we can use the principle of conservation of momentum. The momentum before the impact is equal to the momentum after the impact.

The momentum before the impact is given by the product of the racket's mass and its initial speed:

Momentum before = (0.001 kg)(15.0 m/s) = 0.015 kg·m/s

The momentum after the impact is equal to the product of the racket's final speed (which is what we need to find) and its mass:

Momentum after = (0.001 kg)(v)

Since the momentum is conserved, we can equate the two expressions:

0.015 kg·m/s = (0.001 kg)(v)

Simplifying this equation gives:

v = 15 m/s

Therefore, the racket is moving at a speed of 15 m/s immediately after the impact.

Part B:

To find the average force that the racket exerts on the ball, we can use the impulse-momentum principle. The impulse exerted on the ball is equal to the change in momentum of the ball:

Impulse = change in momentum

The change in momentum can be calculated using the formula:

change in momentum = (final momentum) - (initial momentum)

The initial momentum of the ball is given by the product of its mass and its initial speed:

Initial momentum = (0.060 kg)(18.0 m/s) = 1.08 kg·m/s

The final momentum of the ball is given by the product of its mass and its final speed:

Final momentum = (0.060 kg)(40.0 m/s) = 2.4 kg·m/s

Substituting these values into the formula, we have:

Impulse = 2.4 kg·m/s - 1.08 kg·m/s

Impulse = 1.32 kg·m/s

Since impulse is equal to the average force multiplied by the time of contact, we can rearrange the formula to solve for the average force:

Average force = Impulse / Time of contact

Substituting the values for impulse and the given time of contact, we have:

Average force = 1.32 kg·m/s / 7.00 s

Average force = 0.189 N

Answer:

1328.7032 kg

Explanation:

P = Pressure = 112 kPa

T = Temperature = 285 K

V = Volume = 7023 m³

R = Gas constant = 8.314 J/mol K

From the ideal gas law we have

[tex]PV=nRT\\\Rightarrow n=\dfrac{PV}{RT}\\\Rightarrow n=\dfrac{112000\times 7023}{8.314\times 285}\\\Rightarrow n=331960.04203\ moles[/tex]

The mass of gas is given by

[tex]m=n\times MW_{He}\\\Rightarrow m=331960.04203\times 4.0026\times 10^{-3}\\\Rightarrow m=1328.70326\ kg[/tex]

The mass of helium in the blimp is 1328.7032 kg

By applying the ideal gas law, we determined the number of moles of helium in the blimp. By using the molecular weight of helium, we calculated that the mass of helium in the blimp is 12000 kg.

We can use the ideal gas law to solve this problem. The ideal gas law is represented by the formula PV = nRT, where P represents the absolute pressure, V is the volume, n is the number of moles, R is the ideal gas constant and T is the temperature.

Based on the given values, we have P = 112 kPa, V = 7023 m^3, R = 8.31 (J/mol.K), and T = 285 K. We need to calculate n (number of moles) first.

Transforming the formula, we get n = PV/RT. Substituting the given values, n = (112,000 Pa * 7023 m^3) / (8.31 J / (mol. K) * 285 K) which gives us n = 3.0 * 10^6 moles.

Then, knowing that the molecular weight of helium is approximately 4 g/mol, we can multiply the number of moles by the molecular weight to find the mass. So, the mass is m = n * Molecular weight = 3.0 * 10^6 moles * 4 g/mol = 12 * 10^6 g or 12000 kg.

Therefore, the mass of the helium in the blimp is 12000 kg.

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Answer:

C. 2205 J

Explanation:

First we need to find the final velocity of skater at the bottom.

We, have:

Height lost = h = 4 m - 1 m = 3 m

Initial Velocity = Vi = 0 m/s (since, it starts from rest)

acceleration due to gravity = g = 9.8 m/s²

using third equation of motion:

2gh = Vf² - Vi²

2(9.8 m/s²)(3 m) = Vf² - (0 m/s)²

Vf² = 58.8 m²/s²

Now, for kinetic energy at bottom:

K.E = (1/2) m Vf²

K.E = (1/2)(75 kg)(58.8 m²/s²)

K.E = 2205 J

Hence, the correct option is C. 2205 J

Answer:

Peer to peer network

Explanation:

Peer-to-peer networks are designed to connect similar computers allowing them to share data and software. These networks have played a crucial role in the formation of the internet as we know it today. AOL is an example of a commercial service provider that adopted this networking model.

The networks that are designed to connect similar computers that share data and software with each other are called peer-to-peer networks. Peer-to-peer networks allow all computers, termed nodes, to share resources amongst each other without the need for a central server. Every computer on a peer-to-peer network can function as both a server and a client, sharing and receiving files simultaneously.

Examples of this can be found in early internet developments like the Advanced Research Projects Agency Network (ARPANET). As technologies improved, commercial online service providers like America Online (AOL) adopted this networking model, serving as gateways to the burgeoning internet.

Prior to the existence of more sophisticated network infrastructure like cable and fiber optics, these peer-to-peer networks provided a means for computers to communicate and share data, laying the groundwork for the commercial internet as we understand it today.

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Answer:

Extension is 12.14m

Explanation:

mass of ornament=42g,weight of ornament=mg=42*9.8=411.6

Force constant(k)= 33.9N/m

F=ke

e=F/k

F is force, e is extension

F=weight of ornament

e=411.6/33.9

e=12.14m

Answer:

Neglecting air resistance, the only force acting on a projectile is gravity.

This force causes the object to accelerate.

Explanation:

As a projectile moves upward, there is a downward force and a downward acceleration due to force of gravity. That is, as the object is moving upward, force of gravity acting on the projectile is causing a steady slowing down of the projectile.

Hence, Gravity is the downward force upon a projectile that influences its vertical motion and causes the parabolic trajectory that is characteristic of projectiles.

From Newton's law of motion, it suggest that force is required to cause an acceleration and not motion. Therefore, force of gravity causes the object to accelerate downwards.

Answer:

D:Genetic material must have a complex structure.

Before DNA was identified as the genetic material, a complex structure was not considered a key characteristic of genetic material. Proteins, with their diverse amino acids, were initially thought to be the genetic carriers due to their apparent structural complexity compared to DNA's four nucleotides.

The one characteristic that was NOT considered a key attribute of the genetic material before nucleic acids were identified is that the genetic material must have a complex structure. Historically, even though DNA does have a complex structure, early scientific thought leaned towards proteins as the biomolecules with sufficient complexity to encode genetic information. This belief was due to proteins being composed of 20 different amino acids, allowing for a high degree of variability and complexity, while DNA, composed of only four nucleotides, seemed too simple to account for the vast genetic diversity observed in living organisms.

It wasn't until the transformative experiments of Avery, McCarty, McLeod, and eventually the definitive work of Hershey and Chase, that DNA was confirmed to be the genetic material. The initial complexity perceived in proteins overshadowed the abstract concept of steep structural complexity in DNA. Afterward, it was understood that through the processes of replication and expression, DNA's arrangement of four bases could indeed encode and express the complexity necessary for life.

Answer:

The answer to your question is Mass = 41230.7 g  or 41.23 kg    

Explanation:

Data

density = 0.737 g/ml

mass = ?

volume = 14.9 gal

1 gal = 3.78 l

Process

1.- Convert gallons to liters

                                   1 gal ---------------- 3.78 l

                                  14.8 gal -------------  x

                                    x = 55.94 l

2.- Convert liters to milliliters

                                  1 l -------------------  1000 ml

                              55.94 l ---------------   x

                                   x = (55.94 x 1000) / 1

                                   x = 55944 ml

3.- Calculate the mass

Formula

density = [tex]\frac{mass}{volume}[/tex]

Solve for mass

Mass = density x volume

Substitution

Mass = 0.737 x 55944

Simplification and result

Mass = 41230.7 g  or  41.23 kg