What is the ratio of the intensities of two sounds with intensity levels of 70 dB and 40 dB?
A. 10:1
B. 100:1
C. 1000:1
D. 10000:1

For an infinite line of charge passing through the axis of a cylinder, the electric flux through the cylinder is zero since the electric field lines are parallel to the curved surface, resulting in no electric flux through it.

To calculate the electric flux through a cylinder due to an infinite line of charge, we can use Gauss's law. Gauss's law states that the electric flux (Φ) through a closed surface is equal to the electric charge enclosed (Q_enc) divided by the permittivity of free space (ε₀).

Given:

The cylinder is a closed surface.

The infinite line of charge is passing through the axis of the cylinder.

Since the cylinder is symmetric and the electric field lines are parallel to its surface, the electric flux passing through the curved surface of the cylinder will be zero. Therefore, we only need to consider the electric flux passing through the top and bottom surfaces of the cylinder.

The electric flux passing through each of the flat surfaces can be calculated using the formula:

Electric flux (Φ) = E × A

where E is the electric field perpendicular to the surface and A is the area of the surface.

For an infinite line of charge, the electric field (E) can be determined using the formula:

E = (λ / (2 × π × ε₀ × r))

where λ is the linear charge density and r is the distance from the line of charge to the surface.

To calculate the electric flux, we need to determine the values of the linear charge density (λ) and the radius (r) of the cylinder. Once we have those values, we can calculate the electric field (E) and then use it to find the electric flux (Φ) through each surface.

Please provide the linear charge density (λ) and the radius (r) of the cylinder so that I can calculate the electric flux accurately.

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Answer:

a. Acceleration, a = 7.5 m/s

b. Distance, S = 15 meters

c. Force = 7500 Newton

Explanation:

Given the following data;

Mass = 1000 kg

Initial velocity = 0 m/s (since it's starting from rest).

Final velocity = 54 km/h

Time = 2 secs

Conversion:

54 km/h to m/s = 54*1000/3600 = 15 m/s

a. To find the following acceleration;

Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{initial speed - final speed}{time}\)

Substituting into the formula, we have;

\( Acceleration = \frac{15 - 0}{2}\)

\( Acceleration = \frac{15}{2}\)

Acceleration, a = 7.5 m/s

b. To find the distance, we would use the second equation of motion.

\( S = ut + \frac {1}{2}at^{2}\)

Where;

Substituting into the equation, we have;

\( S = 0*2 + \frac {1}{2}*(7.5)*2^{2}\)

\( S = 0 + 3.75*4\)

\( S = 15 \)

Distance, S = 15 meters

c. To find the force, we would use the following formula;

\( Force = mass * acceleration \)

\( Force = 1000 * 7.5 \)

Force = 7500 Newton

Answer:

Correct Answer: Option B

Explanation:

Explanation

P1/T1 = P2/T2

80/(273+47) = P1/(273+27) = 75Nm-2

Answer: 75.0 Nm^-2

Explanation:

P1/T1 = P2/T2 80/(273+47) = P1/(273+27) = 75Nm-2

Answer:

Explanation:

If Tim jogs a distance of 7.2 km to the west and then he turns south and jogs 1.4 km, the resultant displacement of Tim is calculated using the pythagoras theorem as shown;

R² = 7.2²+1.4²

R² = 51.84+1.96

R² = 53.8

R = √53.8

R = 7.33 km

Hence  the resultant of Tim's jog back to the beginning is 7.33km

According to Gay - Lussac's law, you should heat it under conditions of constant volume.

An ideal gas obeys the equation of state PV = nRT at all pressures, volume and temperatute.

According to Boyle's law, the volume of a gas is inversely proportional to the pressure while temperature is constant.

Also, according to Gay - Lussac's law, increase in temperature is direclty proportional to increase in pressure while volume remains constant.

Suppose that you want to heat a gas so that its temperature will be as high as possible. According to Gay - Lussac's law, you should heat it under conditions of constant volume.

Therefore, to heat a gas so that its temperature will be as high as possible, you should heat it under conditions of constant volume.

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A. Jupiter largest and most massive planet in the solar system

Jupiter has a huge permanent storm that looks like a red spot in images

Jupiter has at least 61 moons orbiting it, some of which are very large

Jupiter located closer to the sun than Kuiper Belt

Jupiter came on fifth number from the sun and the Jupiter is the massive planet present in our solar system. It contains the big storms like great red spot. The surface of the Jupiter is gas made giant but the surface of the Jupiter is not solid, but it may have a solid inner core about the size of Earth.

The Jupiter contain at least 61 moons which orbiting the Jupiter . The life on the Jupiter is impossible because the Jupiter contain very much pressure, it has volatile surface and the temperature of the Jupiter is very hot than that of the earth.

So we can conclude that option A is the right answer.

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The difference in temperatures between City A and City B could be due to variations in factors such as altitude, proximity to water bodies, prevailing winds, and vegetation cover.

Altitude can affect temperatures as higher altitudes usually have lower temperatures. Therefore, if City A is located at a higher altitude than City B, it could explain the higher average summer temperature. Proximity to water bodies can also influence temperatures, as areas closer to water bodies tend to have more moderated temperatures due to the cooling effect of water. If City A is located closer to a large water body than City B, it could explain the higher average temperature. Prevailing winds can also influence temperatures, with areas influenced by oceanic winds typically having cooler temperatures, while areas influenced by continental winds usually have warmer temperatures. Finally, vegetation cover can affect temperatures as areas with more vegetation cover tend to have more moderated temperatures due to the cooling effect of plants. Therefore, if City A has more vegetation cover than City B, it could explain the higher average temperature.

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The instantaneous rate of change of the position function y=f(t) in feet at the given time t in seconds. f(t)=3t−7,t=1 is as follow:

The function is f(t) = 3t - 7 and t = 1.

Using the concept of derivatives, the instantaneous rate of change of the position function y = f(t) in feet at the given time t in seconds is given by;

f'(t) = lim (h → 0) [f(t + h) - f(t)]/h

Now, we have f(t) = 3t - 7 and t = 1.

Substitute t = 1 in the above formula to get the instantaneous rate of change of the position function.

f'(1) = lim (h → 0) [f(1 + h) - f(1)]/h

Using the given function f(t) = 3t - 7,f'(1)

= lim (h → 0) [f(1 + h) - f(1)]/h

= lim (h → 0) [3(1 + h) - 7 - (3(1) - 7)]/h

= lim (h → 0) [3h]/h= 3

Therefore, the instantaneous rate of change of the position function y = f(t) in feet at the given time t = 1 second is 3 feet per second.

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Answer:

(B) Conduction

Explanation:

Answer:

a ) conduction

Explanation:

it's a because if u think about it a conductor keeps the heat from getting to a certain part of the metal

Before opening her chute, Suzie Skydiver would experience a force of air pressure of approximately 450 N at terminal velocity.

Terminal velocity is the point where the force of air resistance, or drag, acting on the skydiver becomes equal in magnitude to the force of gravity pulling the skydiver down. At this point, the net force acting on the skydiver is zero, and they fall at a constant velocity. At terminal velocity, Suzie Skydiver is falling at a constant rate, meaning that the force of gravity pulling her down is balanced by the force of air resistance pushing her up.

This force of air resistance, also known as drag, can be calculated using the formula:

F = 1/2 * rho * v^2 * Cd * A,

where F is the force of drag, rho is the density of the air,

v is the velocity of the object,

Cd is the drag coefficient

A is the cross-sectional area of the object.

Assuming that Suzie Skydiver falls in a typical skydiving posture with a drag coefficient of around 1.0 and a cross-sectional area of 1.0 square meter,

Using the standard atmospheric density of 1.2 kg/m³,

We can calculate that her terminal velocity is approximately 54 m/s.

At this velocity, the force of air resistance, or drag, acting on Suzie Skydiver is equal in magnitude to the force of gravity, which is approximately 450 N.

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The strength of the repulsion or attraction weakens and drops to one-fourth of its initial value when the gap between the two electrons is doubled.

According to the Law of Attraction, when we alter our emotions and thoughts, we alter our electromagnetic field, which attracts a new reality from of the Quantum Field. We must hold that condition of being long sufficient to allow the manifestations to take place after the thought and the sensation have to coincide.

According to the Law of Attraction, when we alter our opinions and feelings, we alter our electromagnetic field, which attracts a new reality from Quantum Field. The thought must coincide with the feeling, and we must then maintain that condition of being for long enough to allow the manifestation to take place.

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This can be expressed as,T2 = (M + m)aT1 = Mg/2where,T2−T1= (M + m)a − Mg/2 Solving the above equations will give the value of α and then we can find out the final velocity of the platform.

Here's the solution to the given problem: Let the origin of our coordinate system be located at the center of the platform. We can assume that there is no friction between the platform and the ground. If v  Rw, the woman will collide with the center of the platform after the platform stops moving because it is not able to move with the required speed to reach the center of the platform before it stops. The net torque about the origin, assuming that the angular momentum is conserved, is Iα = τ, or, assuming that the angular momentum is conserved,T2−T1=IwoR2wR2+mr2αT2 = Mg/2 + Mv/RT1 = (M + m)g/2Let a be the speed of the platform just after the woman reaches the center, which is given by a = v + αr. This can be expressed as,T2 = (M + m)aT1 = Mg/2where,T2−T1= (M + m)a − Mg/2Solving the above equations will give the value of α and then we can find out the final velocity of the platform.

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At 7 AM (13 hours after 6 PM), the temperature would be close to the average temperature of 59°F, which can be approximated to 65.9°F.

The temperature over a 24-hour period can be modeled using a sinusoidal function, given that the high temperature of 77°F occurs at 6 PM and the average temperature is 59°F.

To find the temperature at 7 AM, we need to consider the characteristics of a sinusoidal function. In this case, the function represents a single day, with the peak temperature at 6 PM and the average temperature over the 24-hour period.

Since a sinusoidal function repeats itself every 24 hours, we can infer that the low temperature would occur 12 hours after the high temperature. Therefore, at 7 AM (13 hours after 6 PM), the temperature would be close to the average temperature of 59°F, which can be approximated to 65.9°F.

To gain a deeper understanding of sinusoidal functions and their applications in modeling temperature variations over time, it would be beneficial to explore topics such as periodic functions, trigonometry, and mathematical modeling.

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Answer:

imma try nd help cuz i havent seen anybody answer so

1.sara

2.same for both

3.tom

Explanation:

Answer:

d. Two soccer balls that are touching each other

Explanation:

Let \(m_1\) be the mass of a tennis ball, \(m_2\) is the mass of a soccer ball.

As the mass of a soccer ball is more than the mass of a tennis ball, so

\(m_2 > m_1\)

Let \(d_1\) be the distance between the centers of both the balls near each other and \(d_2\) be the distance between the centers of both the balls touching each other.

So, \(d_2 > d_1\)

The gravitational force, F, between the two objects having masses M and m and separated by distance d is

\(F=\frac{GMm}{d^2}\)

Where G is the universal gravitational constant.

As, the gravitational force is directly proportional to the product of both the masses and inversely proportional to the square of the distance between them,  so selecting the larger mass (\(m_2\), soccer ball) separated by a lesser distance (\(d_2\), touching) to get more gravitational force.

Therefore, there will be a larger gravitational force between them when two soccer balls touching each other.

Hence, option (d) is correct.

Answer:

Two soccer balls that are touching each other

Explanation:

I got it right on the test.

Answer:

He should swim at least three times a week at the community pool to build stamina.

Explanation:

Answer: I believe it’s location D. Or whichever is the location of slow crystallization.

Explanation: Slow crystallization of magma forms granite. Hope this helps. :)

Answer:

D

Explanation:

Answer:

The electric field strength is dependent upon the quantity of charge on the source charge (Q) and the distance of separation (d) from the source charge.

Answer:

With all of that information, he's telling us the train's VELOCITY.

Explanation:

Velocity is a vector quantity made of two parts: speed and direction.

Answer:

Your distance is 100m(meters)

Your displacement is 0

Explanation:

Answer:

16.0Kg

Explanation:

The force due to hydrostatic pressure on the dam when the water is 75% of the way up the wall is 735,750 N

The force due to hydrostatic pressure on the dam can be calculated using the formula

P = ρghA

where P is the force, ρ is the density of the water, g is the acceleration due to gravity, h is the height of the water column, and A is the cross-sectional area of the dam.

In this case, the cross-sectional area of the dam is 100 m2 and the height of the water column is 7.5 m (since the water is 75% of the way up the wall, which is a 10m tall wall). Therefore, the force due to hydrostatic pressure on the dam is

P = 1000 kg/m3 x 9.81 m/s2 x 7.5 m x 100 m2

= 735,750 N

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Answer:

you get struck by lightning

Explanation:

hide in ur house

The 25 size in millimeters of the smallest insect that the bat can detect.

What is wavelength ?

The distance between identical points (adjacent crests) in adjacent cycles determines how far a waveform signal has travelled in space or over a wire. In wireless systems, this length is often expressed in metres (m), centimetres (cm), or millimetres (mm).

What is speed ?

The rate of a directionally changing object's location. The SI unit of speed is created by combining the fundamental units of length and time. Meters per second (m/s) is the unit of speed in the metric system.

Therefore, 25 size in millimeters of the smallest insect that the bat can detect.

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The answer to your question depends on the specific characteristics of the laser beam. Generally, lasers produce coherent light waves that exhibit interference patterns when passed through a narrow slit or diffractive grating. The interference pattern consists of alternating bright and dark fringes, with the central maximum being the brightest.

The position of the first maximum in relation to the central maximum depends on the wavelength of the laser light, the size of the slit or grating, and the distance between the slit or grating and the screen where the pattern is observed.

In general, shorter-wavelength lasers (such as blue or violet) will have their first maximum closer to the central maximum than longer-wavelength lasers (such as red or infrared). However, this is not always the case and it ultimately depends on the specific parameters of the laser beam and experimental setup.
The laser with its first maximum closer to the central maximum can be determined by considering the diffraction patterns produced by the lasers. The position of the first maximum is inversely proportional to the wavelength of the light.

To find which laser has its first maximum closer to the central maximum, compare the wavelengths of the lasers. The laser with the shorter wavelength will have its first maximum closer to the central maximum because shorter wavelengths result in smaller angular separation between the central maximum and the first maximum.

In summary, the laser with the shorter wavelength will have its first maximum closer to the central maximum in its diffraction pattern.

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Answer:

B.d

mark me as brainlist

Answer:

D. b

Explanation:

the endpoint of vector b is at 3, which means the length is 3

Answer:

Her linear velocity on the outer edge is 3 m/s

Her rotational velocity, is constant at 2 RPM

Explanation:

The given parameters are;

The radius of the rotating platform = r

The linear velocity  v(t) = 1 m/s

The position Emily is riding = 1/3 the distance from the center

The rotational velocity = 2 RPM = 2 Revolutions per minute

The formula for angular velocity, ω is given as follows;

ω = θ/t

Where;

θ = The angle rotated

t = The time taken for the rotation

Given that the rotational velocity = 2 RPM

1 revolution = 2·π radians

The angular velocity, ω = 2×π×(2 RPM) = 4·π rad/min = 4·π/60 rad/seconds

ω = 4·π/60 rad/seconds

The linear velocity, v = r₁×θ/t = r₁×ω

Where;

r₁ = 1/3 × r

v = 1 m/s = 1/3 × r  × 4·π/60 rad/seconds

∴ r = 1/(1/3 × 4·π/60) = 45/π meters

r = 45/π meters

Therefore her linear velocity, v₂ and her rotational velocity if she moves to the outer edge will be given as follows;

v₂ = r × ω = 45/π × 4·π/60 = 3 m/s

Her linear velocity on the outer edge, v₂ = 3 m/s

Her rotational velocity, remains at 2 RPM.

Weak nuclear force governs particle decay and nuclear interactions.

The weak nuclear force, also known as the weak interaction or weak force, is one of the fundamental forces of nature. While gravity holds galaxies together through its attractive force and the electromagnetic force holds atoms together through the interaction between charged particles, the weak nuclear force has a different role.

The weak nuclear force is responsible for certain processes that occur within the atomic nucleus, specifically those involving the decay of subatomic particles. It plays a crucial role in processes such as beta decay, where a neutron decays into a proton, an electron, and an electron antineutrino. The weak force is also involved in other types of particle decays and interactions, such as muon decay and the interaction of neutrinos with matter.

So, in essence, the weak nuclear force holds together the fundamental particles within the nucleus and governs certain processes related to particle decay and interactions. It is distinct from gravity and the electromagnetic force, which operate on larger scales and have different effects on galaxies and atoms, respectively.

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