after a starts moving away, at what distance will the speakers first produce constructive interference at the listener?

The block has maximum kinetic energy at the bottom of the curved incline. Since its radius is 3.0 m, this is also the block's starting height. Find the block's potential energy PE :

PE = m g h

PE = (2.0 kg) (9.8 m/s²) (3.0 m)

PE = 58.8 J

Energy is conserved throughout the block's descent, so that PE at the top of the curve is equal to kinetic energy KE at the bottom. Solve for the velocity v :

PE = KE

58.8 J = 1/2 m v ²

117.6 J = (2.0 kg) v ²

v = √((117.6 J) / (2.0 kg))

v ≈ 7.668 m/s ≈ 7.7 m/s

The velocity of the block at maximum kinetic energy is 7.668 m/s.

From  potential energy formula,

PE = m g h

Where,

m = mass = 2 kg

g -gravitational acceleration = 9.8 m/s²

h - height = 3 m

Put the values in the formula,

PE = (2.0 kg) (9.8 m/s²) (3.0 m)  

PE = 58.8 J

Since,  

PE = KE

Thus,

58.8 J = 1/2 m v ²  

117.6 J = (2.0 kg) v ²  

v = √((117.6 J) / (2.0 kg))  

v = 7.668 m/s

Therefore, the velocity of the block at maximum kinetic energy is 7.668 m/s.

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A snow blower is more powerful because it's easier, and it moves large amounts of snow easily. Shoveling uses all of your power. It can be difficult and it takes a long time to get the snow off of your lawn.

Therefore, using a snow blower is more powerful than using a shovel.

I hope this helped!

Explanation:

first find the volume of room --->

\(v \: = 10 \times 12 \times (400 \times {10}^{ - 2} ) \times = 480 \: {m}^{3} \)

then find the mass

\(mass \: = \: density \: \times \: volume \: = 480 \times 1.26 = 604.8 \: kg\)

Magellan could not use Polaris for navigation in the Southern Hemisphere because it is not visible from that region.

Polaris, also known as the North Star, has been used for navigation by explorers in the Northern Hemisphere. However, when Magellan sailed to the Southern Hemisphere, he could not use Polaris for navigation.

Polaris is located very close to the North Celestial Pole, which means it appears to be almost directly above the Earth's North Pole. As a result, when navigating in the Northern Hemisphere, Polaris remains relatively fixed in the night sky, providing a reliable point of reference for determining north.

In the Southern Hemisphere, however, Polaris is not visible. This is because it is located close to the Earth's North Pole, and the South Celestial Pole does not have a bright star comparable to Polaris. Navigators in the Southern Hemisphere must rely on other celestial objects, such as the Southern Cross or specific constellations, to determine their direction.

Therefore, Magellan could not use Polaris for navigation in the Southern Hemisphere because it is not visible from that region.

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the answer is EQUAL because a force on another object the second force is equal

Answer:

False

Explanation:

As more and more resistors are added in parallel to a circuit, the equivalent resistance of the circuit decreases and the total current of the circuit increases. Adding more resistors in parallel is equivalent to providing more branches through which charge can flow.

Answer:

Explanation:

20

Answer:

hi

Explanation:

a. the temperature when the column has a length of 16.70 cm is approximately 13.52°C. b. the temperature when the column has a length of 20.50 cm is approximately 47.18°C.

To solve this problem, we can use the linear expansion equation for the length of the alcohol column in the thermometer:

ΔL = αLΔT

where ΔL is the change in length, α is the coefficient of linear expansion, L is the original length, and ΔT is the change in temperature.

(a) Let's calculate the temperature when the column has a length of 16.70 cm.

Given:

L1 = 11.82 cm (length at 0.0°C)

L2 = 16.70 cm (desired length)

ΔT = ? (change in temperature)

Using the linear expansion equation, we can rearrange it to solve for ΔT:

ΔT = ΔL / (αL)

Substituting the given values:

ΔT = (L2 - L1) / (αL1)

ΔT = (16.70 cm - 11.82 cm) / [(22.85 cm - 11.82 cm) / (100.0°C - 0.0°C)]

ΔT ≈ 13.52°C

Therefore, the temperature when the column has a length of 16.70 cm is approximately 13.52°C.

(b) Let's calculate the temperature when the column has a length of 20.50 cm.

Given:

L1 = 11.82 cm (length at 0.0°C)

L2 = 20.50 cm (desired length)

ΔT = ? (change in temperature)

Using the linear expansion equation:

ΔT = ΔL / (αL)

Substituting the given values:

ΔT = (L2 - L1) / (αL1)

ΔT = (20.50 cm - 11.82 cm) / [(22.85 cm - 11.82 cm) / (100.0°C - 0.0°C)]

ΔT ≈ 47.18°C

Therefore, the temperature when the column has a length of 20.50 cm is approximately 47.18°C.

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Answer:

a. bernoulli's principle

b. archimedes' principle

c. pascal's principle

Explanation:

Answer:

Bernoulli - a

Archimedes - b

Pascal - c

Electromagnetic radiation with a wavelength of 589 nm appears as yellow light to the human eye. The energy of one photon of this light is 3.37x10-19J. Thus, a laser that emits 1.3x10-2 of energy in one pulse of light at its wavelength produces (BLANK) photons in each pulse is 3.9 x 10¹⁶

Electromagnetic waves( which include visible light,radio, microwaves etc) carry energy. Each photons( a quantum unit of EM radiation) possess some energy depending on the frequency of the radiation.

The energy of each photon of yellow light is given as-

E=hc/λ

n= energy of laser/energy of one photon

n= E/ El

where E= energy of one photon of the light

El=energy of a laser

λ= wavelength of light

n= no.of photons in each pulse

n=1.3*10-²/3.37*10-¹⁹

n= 3.9*10¹⁶

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The current in a 12V circuit if the resistance is 20ohms is 0.6A.

Current (I) is the amount of electric charge flowing in each unit of time. It is measured in amperes (A).

The current passing through a circuit can be calculated using the following formula:

I = V/R

Where;

According to this question, a 12V circuit has a resistance is 20 ohms. The current is calculated thus;

I = 12V ÷ 20ohms = 0.6A.

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Reducing the height of the slit in the double-slit experiment results in a decrease in the intensity of the interference pattern.

The height of the slit determines the angular range of the interference pattern. The smaller the height of the slit, the larger the angular range and the more widely spread the interference pattern becomes. This spreading leads to a reduction in the intensity of the pattern because the waves arriving at any given point on the screen are coming from a wider range of angles and thus interfere less constructively.

However, if the height of the slit is reduced too much, diffraction effects become significant and begin to dominate the pattern, leading to a broadening of the individual fringes and a further reduction in intensity.

Therefore, while reducing the height of the slit can increase the angular range of the interference pattern, it ultimately results in a decrease in intensity due to a decrease in constructive interference.

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The x and y component of the vector are -18.32 m and 3.23 m respectively.

The x and y component of the vector is calculated by applying the following formula.

Bx = B cosθ

By = B sinθ

where;

The vector is located in negative x direction but positive y direction.

The angle of the vector from x axis = 90⁰ - 80⁰ = 10⁰

Bx = B cosθ  =  -18.6 m x cos ( 10 ) = -18.32 m

By = B sinθ = 18.6 m x sin ( 10 ) = 3.23 m

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The anion radius is approximately 0.092 nm

To find the anion radius, we can use Coulomb's law, which states that the force of attraction between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. In this case, the force of attraction between the divalent cation and divalent anion is given as 1.50 x 10^-8 N.

The charge of a divalent cation is 2+, and the charge of a divalent anion is 2-. Therefore, the product of their charges is (2)(2) = 4.

Now, we can use Coulomb's law to calculate the anion radius:

Force of attraction = (k * (charge of cation) * (charge of anion)) / (distance^2)

1.50 x 10^-8 N = (k * 4) / (distance^2)

Now, we need to find the value of the constant k. It is equal to 8.99 x 10^9 Nm^2/C^2.

1.50 x 10^-8 N = (8.99 x 10^9 Nm^2/C^2 * 4) / (distance^2)

To find the anion radius, we need to rearrange the equation to solve for distance:

distance^2 = (8.99 x 10^9 Nm^2/C^2 * 4) / (1.50 x 10^-8 N)

distance^2 = (35.96 x 10^9 Nm^2/C^2) / (1.50 x 10^-8 N)

distance^2 = 2397.33 x 10^17 m^2/C^2/N

Now, we can solve for the anion radius by taking the square root of both sides:

distance = √(2397.33 x 10^17 m^2/C^2/N)

Plugging in the given values, we get:

distance = √(2397.33 x 10^17 m^2/C^2/N)

distance ≈ √(23.97 x 10^18 m^2/C^2/N)

distance ≈ √(2.397 x 10^19 m^2/C^2/N)

distance ≈ √(2.397) x √(10^19) m/C√N

distance ≈ √2.397 x 10^9 m/C√N

Finally, we convert the distance from meters to nanometers:

distance ≈ √2.397 x 10^9 m/C√N

distance ≈ √2.397 x 10^9 m/C√N x (10^9 nm/1 m)

distance ≈ (√2.397 x 10^9 x 10^9) nm/C√N

distance ≈ √(2.397 x 10^18) nm/C√N

distance ≈ √2.397 x 10^9 nm/C√N

Therefore, the anion radius is approximately 0.092 nm.

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Taking the square root of both sides, we find that the anion radius, r, is equal to the square root of (599.33 × \((q^2)\)).

The force of attraction between a divalent cation and a divalent anion is given as 1.50 x\(10^{-8\) N. We can use Coulomb's Law to solve for the anion radius. Coulomb's Law states that the force of attraction between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

The equation for Coulomb's Law is F = k × (q1 × q2) /\(r^2\), where F is the force of attraction, k is the electrostatic constant, q1 and q2 are the charges of the two particles, and r is the distance between them.

In this case, since the charges of the cation and anion are equal in magnitude, their product can be written as \(q^2\). Also, we can substitute the given force value of 1.50 x \(10^{-8\) N.

Therefore, the equation becomes 1.50 x \(10^{-8\) N = k × \((q^2) / r^2\).

To find the anion radius, we need to rearrange the equation to solve for r. Rearranging, we get \(r^2\) = k × (q^2) / (1.50 x\(10^{-8\) N).

Now, we can substitute the known values into the equation. The electrostatic constant, k, is approximately 8.99 x\(10^9 Nm^2/C^2.\)
Let's assume the radius of the cation is 0.092 nm, which is equal to 0.092 x \(10^{-9\) m.

Substituting the values, we have \(r^2\) = (8.99 x \(10^9 Nm^2/C^2\)) * (\(q^2\)) / (1.50 x\(10^{-8\)N).

Simplifying the equation further, we get \(r^2\) = 599.33 × (\(q^2\)).

Finally, taking the square root of both sides, we find that the anion radius, r, is equal to the square root of (599.33 × (\(q^2\))).

Therefore, the anion radius is dependent on the charge of the ion, q. To calculate the specific value, we need additional information about the charge of the ion.

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Answer:

true

Explanation:

Some factors of heart disease cannot be controlled. A diet rich in high-density lipoproteins (HDLs) can help cleanse and open arteries that are clogged with plaque. Exercise can help prevent heart disease but once you've had a heart attack, it's too late for exercise to help you.

Answer:

it is chemical energy

Explanation:

that is the energy used by our body, so it is the one that we will loose. and the energy that we gain is also chemical energy

The angular acceleration of the electric fan is -55 rev/s², and the number of revolutions made by the motor in the 4.00 s interval is 680 revolutions.

To find the angular acceleration, we can use the formula:

angular acceleration = (final angular velocity - initial angular velocity) / time

Given that the initial angular velocity is 470 rev/min and the final angular velocity is 250 rev/min, we need to convert these values to rev/s by dividing them by 60:

initial angular velocity = 470 rev/min ÷ 60 = 7.83 rev/s

final angular velocity = 250 rev/min ÷ 60 = 4.17 rev/s

Plugging these values into the formula, we get:

angular acceleration = (4.17 rev/s - 7.83 rev/s) / 4.00 s

angular acceleration = -3.66 rev/s / 4.00 s

angular acceleration = -0.915 rev/s²

Therefore, the angular acceleration of the electric fan is -0.915 rev/s².

To find the number of revolutions made by the motor in the 4.00 s interval, we can use the formula:

number of revolutions = (final angular velocity - initial angular velocity) × time

Plugging in the given values, we get:

number of revolutions = (4.17 rev/s - 7.83 rev/s) × 4.00 s

number of revolutions = -3.66 rev/s × 4.00 s

number of revolutions = -14.64 rev

However, since the number of revolutions cannot be negative, we take the absolute value:

number of revolutions = 14.64 rev

Therefore, the number of revolutions made by the motor in the 4.00 s interval is 14.64 revolutions.

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Answer:

The second option

Explanation:

Answer: The air is full of water, as water vapor, even if you can't see it. Condensation is the process of water vapor turning back into liquid water, with the best example being those big, fluffy clouds floating over your head. And when the water droplets in clouds combine, they become heavy enough to form raindrops to rain down onto your head.

Explanation:

OPTIONS:-

A. 960 V

B. 0.60 V

C. 1.7 V

D. 0.0010 V

FORMULA :- V= I× R

WHERE

I -> CURRENT

R -> RESISTANCE

so your answer:-

V= IR

\(V = 0.025 \times 24 \\ V = \frac{ \cancel{25}}{ \cancel{1000} {}^{ \: \: \: 40} } \times 24 \\ V = \frac{ \cancel4 \times 6}{ \cancel4 \times 10} \\ V = 0.60Volts\)

so your ANSWER is OPTION B.

V = 0.60 Volts (V)

The tertiary consumers obtain 36 joules of energy if the primary customers use 3600 joules.

Energy, radiant energy, energy source, nuclear energy, electric power, motion energy, energy, elastic energy, and gravitational energy are among the several types of energy.

Modern medical technology, transportation, communications, computers, and numerous other items are all driven by energy. Particularly urgent is the need for affordable, reliable energy in rising economies. It might even save a person's life.

Consequently, if the main consumers use 3600 joule of energy,

the tertiary customers get

                      =3600×10%×10% joules

                      = 36 joules.

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Wavelength affects a wave's energy; the longer its wavelengths, the lesser the energy. Gamma rays therefore have the maximum energy and long radio waves the lowest in the electromagnetic spectrum.

The slowest seismic waves are surface waves. They move at a speed of 1.5 miles per second, or 2.5 km. Surface waves come in two different varieties. Love waves slither from side to side like a snake.

Low-energy photons make up radio waves; microwave photons contain a little more energy as radio waves; infrared photons have much more energy; and the most energetic photons of them are gamma rays.

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The electron would need to attain a speed of at least \(2.813*10^7 m/s\)

Data;

The distance of the electron from the center of the sphere  = (1 + 1)mm = 2mm.

\(2mm = 2.0*10^-3m\)

Using centrifugal force of attraction and coulomb's law, we can determine the speed which the electron needs.

\(\frac{mV^2}{R}=\frac{Kq_1q_2}{r^2}\\ K = \frac{1}{4\pi \epsilon } \\ V^2 = \frac{q_1R\\}{4\pi \epsilon \ m r} \\v = \sqrt{\frac{1.0*10^-^9*1.602*10^-^1^9}{4\pi \epsilon *9.1*10^-^3^1*2.0*10^_3} } \\\)

Solving the above, we would have

\(v = 2.813*10^7m/s\)

The electron would need to attain a speed of at least 2.813*10^7 m/s

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Answer:

friction

Explanation:

when things like hair and the balloon run they loose some electrons to the other this makes onne object positive and negative causing them to attract

Stress reversal is one of the most significant factors affecting the lifetime of mild steel. When stress is applied to a metal, the magnitude of that stress can vary from point to point on the material's surface. The stress state on the material may be changed by the magnitude of the applied stress, and this may have an impact on the lifetime of mild steel.

The effect of stress magnitude (reversal) on lifetime of mild steel can be plotted as follows: An S-N curve, also known as a Wohler curve, depicts the effect of stress range (reversal) on material life in a plot of stress (S) against the number of cycles to failure (N).Lifetime versus stress reversal or magnitude is shown on this graph. The magnitude of the cyclic stress that the steel undergoes has an effect on the lifetime of mild steel.A plot of the effect of stress magnitude (reversal) on the lifetime of mild steel will resemble an S-N curve. The lifetime of mild steel decreases as the magnitude of the cyclic stress increases or the number of reversals increases.The below is a graph depicting the effect of stress range (reversal) on the lifetime of mild steel. \(\Delta \sigma\) is the stress range, and N is the number of cycles. As the stress range increases, the number of cycles decreases, indicating a shorter life for the material. \(\sigma_a\) is the mean stress. \(\sigma_f\) is the fatigue strength, and it is the stress level at which failure will occur after an infinite number of cycles. The plot is called an S-N or Wohler curve.

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200 ms²  is the kinetic energy for an object that weighs 40g and moving at 10 m/s.

Kinetic energy is the power that an object has had as a result of motion. To accelerate an object, a power must be supplied to it. To apply a force, we must exert effort. The power is transported to the object when work is accomplished, which causes it to move at a new, constant pace.

The capacity to perform work is unquestionably the most important characteristic of kinetic energy. Force acting on to an object while it is traveling is referred to as work. Energy and work are interchangeable because of their close relationship.

Using Kinetic Energy Formula:

K.E  = 1/2 mv²

K.E. = 1/2 * 40 * 10

K.E. = 200 ms²

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Both are dangerous on their own, but as they float through the air in Southern California's sunny climate, the sun bakes them into a new molecule called ozone, better known as smog.

Smog development and infiltration over Los Angeles. haze and air pollution in the entire community.

Burning sulfur-containing fossil fuels, particularly coal, causes sulfurous smog, also referred to as "London smog," which is characterized by a high concentration of sulfur oxides in the atmosphere.

The two primary substances in automotive exhaust are nitrogen oxides, which are created in scorching internal combustion engines, and hydrocarbons, which are derived from gasoline.

Therefore, Both are dangerous on their own, but as they float through the air in Southern California's sunny climate, the sun bakes them into a new molecule called ozone, better known as smog.

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Answer:

Explanation: Astronauts on the orbiting space station are weightless because... a. there is no gravity in space and they do not weigh anything. ... space is a vacuum and there is no gravity in a vacuum.

Answer:

No I believe

Explanation:

Answer:

I think is the The truck because it has more mass