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Answer:

The lunar highlands were formed about 4.5 billion years ago, they are the oldest features (or regions) on the moon. The maria were formed some 3.5 billion years ago, erasing and covering the 'highlands' in the regions they formed.

Explanation:

In case of  the resonance tube, the first two resonant positions of sound wave are separated by  one-quarter of its wavelength.

An acoustic system would amplify sound waves whose frequency matches one of its own natural vibrational frequencies as a result of a process known as acoustic resonance.

Since most acoustic instruments use resonators, such as the length of a flute's tube, the strings and body of a violin, and the form of a drum membrane, acoustic resonance is a crucial factor for instrument builders. For hearing, acoustic resonance is also crucial.

The separation between two consecutive nodes or antibodies is equivalent to half the wavelength. A node's distance from its next antinode is equal to one-quarter of its wavelength.

In case of  the resonance tube, the first two resonant positions of sound wave are separated by  one-quarter of its wavelength.

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Answer:

0.00377143

Explanation:

You would have to divide to get the frequency.

1.32/350 = 0.00377143

I apologize if it is incorrect-

I hope it helps! Have a great day!

Anygays-

The direction cosines of a→+b→, are

Given data:

a = 4i^ + 7j^ - 5k^

b= 3i^ + 4j^ + k^

a→+b→ = 7i + 11j - 4k

( a→+b→ ) / | a→+b→ | = ( 7i + 11j - 4k ) / [tex]\sqrt{7^2 + 11^2 + 4^2 }[/tex]

                                = ( 7i + 11j - 4k ) / 13.64

                                = 0.5232 i + 0.8065 j + 0.2933 k

Therefore the direction cosines are

cos ∝ = 0.5232

cos β = 0.8065

cos γ = 0.2933

Hence we can conclude that the direction cosines of a→+b→ are as listed above.

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The correct restart is for there to be another kick off taken in this type of scenario.

This is a method of restarting play in which the ball is put on the center circle and passed by a player.

Kick offs occur at the beginning of any halves or when a goal is scored during the match which is why it's the most appropriate choice.

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Answer:Kick offs occur at the beginning of any halves or when a goal is scored during the match which is why it's the most appropriate choice.

Explanation:

Answer:

As Per Provided Information

We have been asked to determine the maximum height reached by the object .

here we will take acceleration due to gravity g is 9.8 m/s².

For calculating the maximum height attained by the object we will use the following formula .

[tex] \boxed{\bf \:H_{(max)} \: = \cfrac{u {}^{2} {sin}^{2} \theta }{2g}}[/tex]

Substituting all the value in above equation we obtain

[tex]\sf \qquad \: \longrightarrow\:H_{(max)} \: = \cfrac{ {25}^{2} {sin}^{2} {50}^{ \circ} }{2 \times 9.8} \\ \\ \\ \sf \qquad \: \longrightarrow\:H_{(max)} = \cfrac{625 \times(0.766) {}^{2} }{19.6} \\ \\ \\ \sf \qquad \: \longrightarrow\:H_{(max)} = \cfrac{625 \times 0.586756}{19.6} \\ \\ \\ \sf \qquad \: \longrightarrow\:H_{(max)} = \cfrac{366.7225}{19.6} \\ \\ \\ \sf \qquad \: \longrightarrow\:H_{(max)} = \cancel \cfrac{366.7225}{19.6} \\ \\ \\ \sf \qquad \: \longrightarrow\:H_{(max)} =18.71 \: m[/tex]

Therefore,

Answer:

C. answer pa brailest need lang po please

D. Resource Supply this would be directly affected first then the rest would follow after a period of time.

Because the net force must be zero, we conclude that the magnitude of the force is 1500 newtons, and the direction is in the positive axis.

By Newton's laws, we know that if the net force applied to an object is different than zero, then the object is accelerated.

In this case, we know that the object moves with constant velocity, so there is no acceleration, meaning that the net force is equal to zero.

Then we must have:

F1 + F2 + F3 = 0N

Replacing F1 and F2 we get:

-3000 N + 1500N + F3 = 0

F3 = 3000N - 1500 N = 1500N

Then the magnitude of the force is 1500 newtons, and the direction is in the positive axis.

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Answer:

A theory is an opinion but in fancy format.

Explanation:

it is an explanation of observed regularities. The terms "established" and "observed regularities" are important here.

A theory is a way to explain a opinion on a certain topic.

Answer:

1 J is the amount of work done by a force of 1 N on an object that displaces it through a distance of 1 m in the direction of the applied force.

Explanation:

The total surface area of one slice will be 64 π cm².

The total surface area includes the base as well as the curving component. It is the whole area covered by the object's surface.

The total area of a form with a curved surface and base is equal to the sum of the two areas.

The total surface area of the sphere will be;

[tex]\rm A=4 \pi r^2 \\\\ \rm A=4 \times \pi (4)^2 \\\\ \rm A=64 \pi \ cm^2[/tex]

Hence the total surface area of one slice will be 64 π cm².

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Answer:

32

Explanation:

Answer:

-6 m/s^2

Explanation:

30 - 90 = -60

-60 / 10 = -6

If acceleration was constant, it will be -6 m/s^2

Answer:

true

Explanation:

that's the answear

Answer:

it is false i got

Explanation:

it right

Answer:

It depends on the velocity, if 1 wave is going faster than the other, it could eat the other wave and thus: Merge.

If they are the same speed they would cancel out, it would be like 2 trucks hitting each other.

Explanation:

If 2 waves crash at 15mph they would splash back and fall into the water. Think about boxers.

Answer: Destructive interference occurs when waves come together in such a way that they completely cancel each other out. When two waves interfere destructively, they must have the same amplitude in opposite directions.

Hope this helps :)

Answer:

Torque = I α = 1/2 M R^2 α       where α is the angular acceleration

Torque = F R      where F is applied to a distance R from center

F R = 1/2 M R^2 α

M = 2 F / (R α) = 2 * 50 / (.15 * 110) = 6.06 kg

Answer: Carbon

Explanation:

The opening graph in the video shows the measured relative abundances of elements in the galaxy. What is the 4th most abundant element? Carbon has the fourth highest dot on the graph, and therefore is the fourth most abundant element.

Answer:

Carbon is the masured relative abundant element.

Explanation:

V = S/t

s =vt

d = 20 x 5

d = 100m

The position of the ball 5 seconds after it was thrown will be 25 m below the edge of building.

What are the three equations of motion?

The three equations of motion are -

v = u + at

S = ut + 1/2at²

v² - u² = 2aS

Given is an object which is thrown straight upward from the edge of a building with a velocity of 20m/s.

Initial velocity [u] = 20 m/s

Acceleration due to gravity [g] = - 10 m/s² (Rounded off 9.8)

At maximum height, the velocity will be 0.

Assume that the time at which the ball reaches max height be T.

Using first law of motion -

v = u + aT

0 = 20 - gT

gT = 20

T = 20/g

T = 20/10

T = 2 sec

Then -

S[max] = 20 x 2 - 0.5 x 10 x 4

S[max] = 40 - 20 = 20 m

At t = 2 sec the ball will be at maximum height. Now at maximum height, the initial velocity of the ball will be 0.

We have to find the position of ball after 3 seconds as after 2 seconds it was at maximum height.

In this case initial velocity will be [u] = 0

Acceleration [a] = 10 m/s²

Time [t] = 3 sec

Using second equation of motion -

S = ut + 1/2at²

S = 0.5 x 10 x 9

S = 45 m

Position of object = [x] = 20 - 45 = - 25 m

The negative sign indicates that the object is now 25 cm below from the edge of building.

Therefore, the position of the ball 5 seconds after it was thrown will be 25 m below the edge of building.

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The frequency observed by Francis when the train approaches is 297.4 Hz.

The frequency observed by Francis is determined by applying the principle of Doppler effect.

The frequency observed by Francis is calculated as follows;

[tex]f = f_o(\frac{V}{V \pm V_s} )[/tex]

where;

45 km/h = 12.5 m/s

Speed of sound in air = 343 m/s

Since the train is moving towards the observer, the frequency heard by the observer will be greater than the source frequency, thus we will choose positive sign for the source velocity.

[tex]f = f_o(\frac{V}{V + V_s} )\\\\287 = f_0 (\frac{343}{343+ 12.5)} )\\\\287 = 0.965f_0\\\\f_0 = \frac{287}{0.965} \\\\f_0 = 297.4 \ Hz[/tex]

Thus, the frequency observed by Francis when the train approaches is 297.4 Hz.

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Answer:

A comet

Explanation:

A comet is composed of mostly ice. As it passes close to the sun, it warms up and begins to release gases, the gases seem longer and they look like a tail. Because the ice gets warmer close to the sun and because it's icy, it changes from ice to liquid and finally vapour. hence evaporaction.

The velocity of the resulting mass after the perfectly inelastic collision of identical balls of clay A and B is 1 m/s to the left.

The final velocity of the two identical balls is determined by applying the principle of conservation of linear momentum as shown below;

m₁u₁ + m₂u₂ = v(m₁ + m₂)

where;

m₁ = m₂ = m

let right direction = positive direction

let left direction = negative direction

m(4) + m(-6) = v(m + m)

4m - 6m = 2mv

-2m = 2mv

v = -2m/2m

v = - 1 m/s

Thus, the velocity of the resulting mass after the perfectly inelastic collision of identical balls of clay A and B is 1 m/s to the left.

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Answer:

Mechanical advantage:

i. The ratio of load to effort on a balanced lever is called mechanical advantage.(Definition)

ii. Mechanical advatage (MA) = Load (L)/Effort (E) (Formula)

Velocity ratio:

i. The ratio of effort distance to load distance is called velocity ratio.(Definition)

ii. Velocity ratio (VR) = effort distance(Ed)/ load distance(Ld).  (Formula)

Answer:

below

Explanation:

The primary hazard when working with technetium is inhalation of dust; such radioactive contamination in the lungs can pose a significant cancer risk. All technetium compounds should be regarded as highly toxic, largely because of its radiological toxicity. Once in the human body, Tc-99 concentrates in the thyroid gland and the gastrointestinal tract. The body, however, constantly excretes Tc-99 once it is ingested.

Given what we know, we can confirm that whole-tire recycling has advantages for the environment, as well as economic disadvantages.

Tires are made from rubber mixed with other substances such as steel and certain polyester fibers. This makes the tires a poor source of rubber and said rubber would not be of great quality when recycling, this along with the high cost of the process entails the disadvantages of recycling tires. The advantage, however, is environmental, as tires take up a great portion of the space in landfills and greatly pollute the air when burning.

Therefore, we can confirm that whole-tire recycling has advantages for the environment, as well as economic disadvantages due to its poor quality material and high cost of recycling.

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Answer:

f = 379 / s          given

A)     ω = 2 pi f = 2380 / sec

B)   Vmax = ω A = 2380 / sec * .000562 m = 1.34 m.s

C)   amax = -ω^2 A = -(2380)^2 * .000562 = -3180 m/s^2

State of matter is conserved in chemical reactions but not in nuclear reactions.

In a nuclear reaction, mass is not conserved because of the release of radiation. The difference in masses of reactants and product nuclei, occurs due to release of energy.

So we can conclude that State of matter is conserved in chemical reactions but not in nuclear reactions.

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Nuclear and chemical processes are both possible in the matter. In chemical processes, the property of no atoms is conserved, but not in nuclear reactions. Option C is correct.

The process by which two or more tiny nuclei unite to generate a bigger nucleus is known as a nuclear fusion reaction.

The more energy it takes to liberate an electron from a smaller atom. This is referred to as binding energy.

In the nuclear reaction, one atom gets disassociated with the other atom. The process is known as nuclear fission.

Nuclear and chemical processes are both possible in the matter. In chemical processes, the property of no atoms is conserved, but not in nuclear reactions.

Hence, option C is correct.

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What do you mean by electromagnetic induction ?

Discovery : -

A British scientist Michael Faraday and an American scientist Joseph Henry discovered the phenomenon of electromagnetic induction in 1831 independently.

Definition / Meaning : -

The production of electricity from magnetism is called electromagnetic induction.

Or ,

Electromagnetic induction is the phenomenon of the production of an induced current in a coil placed in a region where the magnet field changes with time

For Example : -

(i) If a bar magnet is moved in and out of coil of wire , even then an electric current is produced. This is an example of electromagnetic induction.

(ii) Another example , when a straight wire is moved up and down rapidly between the two poles of a horseshoe magnet , then an electric current is produced in the wire. This is also an example of electromagnetic induction .

Electromagnetic induction denotes to producing electricity using magnetic field or magnetism.

This is the process or phenomenon of production of induced induced current in a region where magnetism changes with respect to the time.

It was discovered by great scientist Michael Faraday.

An object in motion eventually stops because of friction.

Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or continue its moving in a straight line at constant speed unless force is applied on it.

So we can conclude that An object in motion eventually stops is the correct answer.

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Answer:

A switch interrupts the flow of current in a circuit.

Explanation:

A) The distance x from the nearest speaker when intensity is at maximum  ; 0.4272 m

B) The distance x from the nearest speaker when intensity is at minimum ; 0.8123 m

Given data :

Distance between speakers ( d ) = 0.695 m

Frequency of oscillator = 668 Hz

Speed of sound waves in air ( v ) = 343 m/s

Given that

λ = v / f

  = 343 / 668

  = 0.5135

Also

Δx = [tex]\sqrt{d^2+x^2} - x[/tex]

Δx = λ  for maximum intensity

λ  = [tex]\sqrt{d^2+x^2} - x[/tex]

x = ( d² - λ² ) / λ

  = ( 0.695² - 0.5135² ) / 0.5135

  = 0.4272 m

Given that

λ = v / f

  = 343 / 668

  = 0.5135

Also

Δx = S₁P - S₂P

Δx = [tex]\sqrt{d^2+x^2} - x[/tex]

since the intensity is minimum

Δx = λ/2

Therefore

λ/2  = [tex]\sqrt{d^2+x^2} - x[/tex]

x = ( d² - λ²/4 ) / λ

  = ( 0.695² - 0.5135² / 4 ) /  0.5135

  = ( 0.695² - 0.0659 ) / 0.5135

  = 0.4171 / 0.5135 = 0.8123 m

Hence we can conclude that The distance x from the nearest speaker when intensity is at maximum  ; 0.4272 m  and The distance x from the nearest speaker when intensity is at minimum ; 0.8123 m.

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