What is the average amount of teens with cell for the age groups 14, 15, and 16?

A closed end manometer is manometer must take the atmospheric pressure into account to calculate the pressure exerted by a gas.

in closed end manometer, the pressure of gas is measured by measuring the height 'h' and there is no use of atmospheric pressure here.

A manometer could be a device that we utilize to measure the pressure of the pipelines (cab be of gas, water, fluid, etc.) Moreover, it is usually referred to as a U-shaped tube that's filled with a liquid. In this point, to  examine what is it and how it works.

Types of manometer

U-Tube Manometer.

Enlarged-Leg Manometer.

Well-Type Manometer.

Inclined-Tube Manometer.

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The rate of change of the area of the triangle if the height is 7cm is 38.5 cm/s

What is Rate of change?

A rate is anything that can be measured over time. Common rates include velocity (which is the rate of distance traveled), power (rate of work being done), etc. All these have one thing in common which is that they are all divided by the amount of time it took to obtain a certain measurement.

Let the base of the triangle be b,

the height of the triangle = h

and the area of the triangle = A

Area of a triangle, A is = bh/2

Rate of change of the area, A is :

dA/dt = d(1/2(bh))/dt = 1/2 (db/dt)h + 1/2(bdh/dt)

At constant height, dh/dt = 0

that is

dA/dt = 1/2(db/dt)h

It is given that :

db/dt = 11 cm/s

h = 7cm

dA/dt = (11x7)/2  = 38.5 cm/s  

Therefore, the rate of change of the area of the triangle if the height is 7cm is 38.5 cm/s

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Answer:

a) 0.03km + 80 cm is the right answer

The effect after the current is tripled is changing the drift velocity by a factor 3.

We need to know about drift velocity of electrons to solve this problem. The drift velocity can be determined as

v = I / (n . A . q)

where v is drift velocity, I is current, n is atom number density, A is surface area and q is the charge.

From the question above, we know that

I2 = 3 . I1

According to drift velocity formula, the drift velocity is proportional to current

v ~ I

Hence, the ratio of drift velocity and current is

v1 / v2 = I1 / I2

substitute the final current (I2)

v1 / v2 = I1 / (3.I1)

v1 / v2 = 1 / 3

v2 = 3v1

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If the sound intensity goes up by 40 db, the amplitude of wave as measured gets increases by a factor of 100.

The sound level in decibels can be formulates as

[tex]\beta[/tex] = (10dB) log (I/Io)

Here Io = 10⁻¹²W/m² is specified as the reference intensity

If we assume β₁ as initial sound intensity and β₂ as final sound intensity. Therefore, change in sound intensity can be formulated as

β₁-β₂=40 dB

(10dB) log (I2/Io) - (10dB) log (I1/Io) = 40 dB

(10dB) [log (I2/Io) - log (I1/Io)] = 40dB

log( (I2/Io) / (I1/Io) ) = 40/10 dB

log (I2/I1) = 4dB

I2/I1 = 10^4

The intensity of sound is said as directly proportional to the amplitude of wave squared.

Therefore,

I ∝ A²

I1/I2 = (A1/A2)^2

A2/A1 = [tex]\sqrt{I2/I1}[/tex]

A2/A1 = 100

Therefore, the amplitude of wave increases by a factor of 100.

A sound wave’s amplitude measures the height of the wave. When a sound is made, the maximum displacement of the medium’s vibrating particles from their mean position determines the amplitude of the sound wave.

In physics, amplitude refers to the greatest displacement or distance that a point on a vibrating body or wave can move relative to its equilibrium location. It is equivalent to the vibration paths half-length.

The maximum displacement of a sound wave’s constituent particles is its amplitude. The number of vibrations a sound wave makes per second is known as frequency.

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When the pilot reverses the propeller in a boat moving north, the boat moves with an acceleration directed south. Assume the acceleration of the boat remains constant in magnitude and direction. The boat will eventually stops and then speeds up in the reverse direction.

As the pilot reverses the propeller in a boat moving north, the boat moves with an acceleration directed south. This is because the propeller is pushing against the water in the opposite direction to the boat's motion. The acceleration of the boat remains constant in magnitude and direction until the boat reaches its maximum speed in the reverse direction. At this point, the boat will eventually stop and then speed up in the reverse direction.

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Answer:

aqueduct- as opposed to an aquifer which is a geological formation

The density of a 4.5 g cube with an edge length of 5.5 cm is 0.027 g/mL

The formulas and the procedures we will use are:

Where:

Information about the problem:

Calculating the volume of the cube, we get:

v = s³

v = (5.5 cm)³

v = 166.38 cm³

Converting the volume of the cube from cm3 to mL, we get:

1 cm3 is equivalent to 1 mL, so

166.38 cm³ is equivalent to 166.38 mL

Applying the density formula, we get:

ρ = m/v

ρ = 4.5 g/166.38 mL

ρ = 0.027 g/mL

It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.

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The frequency of electromagnetic waves is 22.32 x 10⁹ Hz or 22.32 GHz.

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 = 13.44 mm = 0.01344 m

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

c = λ . f

f = c / λ

f = 3 x 10⁸ / 0.01344

f = 22.32 x 10⁹ Hz

f = 22.32 GHz

Hence, the frequency of radiowaves is 22.32 x 10⁹ Hz or 22.32 GHz.

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Answer:

Directly

Explanation:

The extension of the elastic object is directly proportional to the force applied.

I hope this is the answer you are looking for and I hope this helps!

Answer:

I don't have the full details so... Position 1 + Position 2

That's if "0" doesn't count as a position.

Explanation:

"What was the distance traveled" is basically "how much did you travel?"

e.g. Position 1 was 12 miles, and Position 2 was 7. 12 + 7 = 19.

Answer: Доброе утро, ответ 5+5="4

Explanation:

No. Since the people selected were randomly, the responders constituted  random sample from the population.

Voluntary response sample is a sample which is made up of individuals who can volunteer to be included in response sample.

For example, If a radio host asks her listeners to conduct an online survey on her website about peoples opinion of her show. Each individual listener is voluntarily deciding to take part in survey or not.

The major drawback of sampling method is that these individuals who voluntarily respond is likely to have a stronger opinion which can be positive or negative from the rest of the population which eventually makes them an un-representative sample.

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The velocity of the car was 4.93m/s and the direction was northeast.

It is given,

time of the trip = t = 3 minutes = 180 seconds

1st distance A = 1500ft = 457.2m east

2nd distance B = 2500ft = 762m north

We are asked to find the average velocity.

First, we get the resultant distance magnitude by applying Pythagoras theorem to find the hypotenuse.

[tex]A^{2} + B^{2} =C^{2} \\C=\sqrt[]{A^{2} +B^{2} } \\C=\sqrt{457.2^{2} +762^{2} } \\C= 888.63m[/tex]

Then we have

Velocity = Distance/time

Velocity = 888.63/180

Velocity = 4.93 m/s

Then the direction is northeast.

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there was once a crab name mr crabs who had to go to the docter one day . mr crabs is a an animal in the arthropods phylum which was not surpising since he has 10 jointed legs

Traditional classifications of arthropods place them in the Trilobitomorpha (Trilobites), Chelicerata, Crustacea, Myriapoda, and Hexapoda subphyla.

Arthropod species make up more than 80% of all known extant animal species, with estimates ranging from 170,000 to 5–10 million.

On Earth, arthropods are regarded as the most successful creatures.

Arthropods, however, are also in charge of a number of helpful human functions, including crop pollination, honey production, devouring or parasitizing insect pests, garbage decomposition, and serving as food for various birds, fish, and mammals. Beneficial arthropods flourish in agricultural areas.

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The magnitude of the electric field e(r) at a distance r>rb from the center of the ball is [tex]E = p \frac{r_{b}^{3} }{3E_{0} r^{2} }[/tex].

Gauss's law, often referred to as Gauss's flux theorem, is a principle of physics and electromagnetic that establishes a connection between the distribution of electric charge and the consequent electric field.

Applying gauss law,

[tex]E = \frac{q}{E_{0}(4\pi R^{2}) }[/tex]

[tex]q =p(\frac{4}{3} \pi r_{b}^{3} )[/tex]

Now, plugging in the values of  [tex]q =p(\frac{4}{3} \pi r_{b}^{3} )[/tex] in the equation: [tex]E = \frac{q}{E_{0}(4\pi R^{2}) }[/tex]

[tex]E = \frac{p(\frac{4}{3}\pi r_{b} ^{3}) }{E_{0}(4\pi R^{2}) }[/tex]

[tex]E = p \frac{r_{b}^{3} }{3E_{0} r^{2} }[/tex]

Therefore, the magnitude of the electric field e(r) at a distance r>rb from the center of the ball is [tex]E = p \frac{r_{b}^{3} }{3E_{0} r^{2} }[/tex].

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Gay-lussac's law assumes that the volume is held constant and the number of moles is held constant.

Gay-Lussac's law states that : The pressure and the temperature of an ideal gas are directly proportional, held mass and volume remains constant.

When the volume is kept as constant, the pressure of a gas will be  directly proportional to its temperature.

The law is named after the French physicist and chemist Joseph Gay-Lussac. In 1802, Gay-Lussac formulated this law. It was a formal statement which shows the relationship between temperature and pressure which was described by French physicist, Guillaume Amonton  in late 1600’s.

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The symbol of the element Nitrogen is N, its proton number is 7, its atomic mass is 14, its neutron number is 7 and finally Nitrogen belong to period 2 of the periodic table.

This is defined as a substance cannot be further broken down by any chemical reaction and examples include oxygen, nitrogen etc.

Nitrogen is an element and has an atomic number of 7 with a mass number of 14 and is present in period 2 in the periodic table.

For all atoms with no charge, the atomic number is equal to the number of proton. The number of proton is also equal to the number of electron which is why they all have the same value of 7.

Neutron = atomic mass - atomic number

                = 14 - 7 = 7

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When Fez engages in team activities such as running or passing the ball, they are maintaining tension with an equal force on all sides.

Any physical object that is in contact with another one can apply forces to that object. The pulling force transmitted axially by a string, cable, chain, or other similar object, or by each end of a rod, truss member, or other similar three-dimensional object is referred to as tension. The action-reaction pair of forces acting at each end of said elements can also be referred to as tension.

The force produced when a load is applied at one or more of the ends of a material in a direction away from the material's cross-section is known as the tension force. It's common to describe a tension force as a "pulling" force. To exert a tension force on the material, the load must be applied axially.

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No. it will not change.

                                 [tex]\begin{aligned}f &= \mu R\\R &= mg \cdots (\text{from vertical equilibrium})\\\therefore\,\,\,f &= \mu.mg \\f &= (\mu g). m \cdots(\text{friction varies with mass})\\\end{aligned}[/tex]      

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The magnitude of the unit vector of the forces is 182.92 N and the direction is 56.87⁰.

A unit vector is a type of quantity that has both magnitude and direction.

A unit vector can also be described as a single vector that can represent two vectors in terms of magnitude and direction.

A resultant vector is defined as a single vector that produces the same effect as is produced by a number of vectors collectively.

The unit vector of the two forces is calculated as follows;

R² = Fx² + Fy²

where;

R = √( Fx² + Fy²)

R = √( 100² + 153.2²)

R = 182.95 N

The direction of the vector is calculated as follows;

θ = arc tan (Fy/Fx)

θ = arc tan (153.2 / 100)

θ = 56.87⁰

Thus, the magnitude of the unit vector of the forces is 182.92 N and the direction is 56.87⁰.

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Total distance traveled by an object traveling at an average speed of

0.0470 km/h for 2min 33s is 1.99 m.

Distance is defined as an object's entire movement without regard for direction. Distance may be defined as how much ground an item has traversed regardless of its starting or finishing place.

The following equation can be used to determine the distance traveled by an object traveling at an average speed:

distance traveled = average speed * time

When is this:

Given,

average speed = 0.0470 km/h

converting average speed from km/h to m/s

                           = 0.01305556 m/s

time = 2min 33s

converting time in seconds

       = 153s

thus, we know that

distance traveled = average speed * time

                              = 0.01305556 * 153

                              = 1.99 m

Therefore, the Total distance traveled by the object is 1.99m.

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The distance d travelled by in object is 68.58 m

What is velocity ?

velocity is defined as rate of change of displacement d of the object with respect to rate of change in time t. In mathematics It is written as :

v = d/t

it should be noted that, velocity is nothing but speed in particular direction. That is velocity is vector quality having both magnitude and direction where as speed is just the magnitude of velocity.

1 feet = 0.3048 m

15 feet = 4.572 m

Now, calculating the distance d travelled by in object :

d = vt

d = 4.572 x 27

d = 68.58 m

Therefore, the distance d travelled by in object is 68.58 m

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The explanation on how the rudders turn the boat​ is by redirecting the fluid  which results in an opposite force aiding the motion of the boat.

This law was coined by Isaac Newton and it states that when object X exerts a force on another object Y, the object Y must exert a form of counter force which has the same magnitude but opposite in direction.

In the case of the rudder, it redirects the fluid which then exerts an equal force of the same magnitude and an opposite direction. This thereby results in the motion of the boat and is therefore the most appropriate choice.

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When a force of 200.0 n is exerted on a 1,000 n object. The object moves a distance of 30.0 m. 24,000J work was done on the car.

Work=Force × Distance is a formula that describes the relationship between work, force, and distance. While distance is expressed in meters, force is expressed in Newtons (N). The result is Joule.

So, total force is 1000-200 = 800N

Work=Force × Distance

Work=800 × 30

Work=24,000J

So, when a force of 200.0 n is exerted on a 1,000 n object. The object moves a distance of 30.0 m. 24,000J work was done on the car.

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The height of the cliff is 8.26 m.

Time taken by a rock to reach the ground from the cliff is t.

t = 2.35 seconds

The initial velocity at which rock is thrown straight up is u.

u = 8 m/s

The gravity of the earth is g.

g = 9.8 m/s²

The height of the cliff from where is rock is thrown straight up at the initial velocity of 8 m/s is,

[tex]Height= Initial \: velocity × Time - \frac{1}{2} Gravity \: of \: the \: earth ×( Time) ^{2} [/tex]

[tex]h = 8 \times 2.35 - \frac{1}{2} \times 9.8 \times (2.35) ^{2} [/tex]

h = -8.26 m

Therefore, the height of the cliff is 8.26 m.

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Answer:by cooking

Explanation: because he use energy and everything like transfer

(a) The new speed of the aircraft with respect to the ground is 1,539.13 mph.

(b) The direction of the aircraft is 7⁰ north east.

The new speed of the air craft is the resultant speed of the aircraft and it is calculated as follows;

R² = A² + B² - 2AB cos(R)

where;

A = 701 mph + 848 cos(13)

A = 1,527.266 mph

B = 848 x sin(13)

B = 190.76 mph

R = √(A² + B²)

R = √[(1,527.66²) + (190.76²)]

R = 1,539.13 mph

θ = arc tan (y/x) = arc tan (B/A)

θ = arc tan (190.76/1527.66)

θ = 7⁰ north east (measured anticlockwise)

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