What is the relative intensity of a sound wave with an intensity of 0.00458 W/m²?9.66 dB-143 dB96.6 dB-14.3 dB

Answer:

When we talk about an extended source, we mean a source that is not a point source but has some finite size. Examples of extended sources include the Sun, light bulbs, and other sources that are not point-like. When we observe an extended source from a large distance, it appears to behave as a point source.

The reason for this has to do with the fact that at large distances, the size of the extended source becomes very small in comparison to the distance between the observer and the source. This means that the light rays that reach the observer from different parts of the extended source are almost parallel to each other. As a result, the light from the different parts of the source overlaps and interferes with each other in such a way that the extended source appears to be a single point. This effect is called diffraction, and it is the same effect that causes waves to bend around obstacles and spread out after passing through a narrow opening.

So, in summary, an extended source seems to behave as a point source at large distances because of diffraction, which causes the light from the different parts of the source to overlap and interfere with each other in a way that makes the source appear to be a single point.

Wave speed - the distance the wave travels in a given amount of time

Frequency - number of events per unit of time

Period - time it takes to complete one oscillation

For Transverse Waves:

For longitudinal Waves:

Answer: Alpha and Beta radiation

Explanation: Within the nuclear gauge, the encapsulation of the radioactive material prevents alpha and beta radiation from escaping and being a hazard.

Answer:

Agree

Explanation:

Distance is described as "how much ground an object is covered" in physics, and because the object is moving, no matter which direction, it is constantly gaining more distance. You can think of the object as a car, and as the car is moving down a highway it is gaining more and more distance as the seconds go by.

You might be confused with the term displacement, "how far out of place an object is" which in this case would be false.

Does that make sense?

Answer:

Negative acceleration occurs when the acceleration vector points to the left.

1. Object slowing down in the positive direction.

2. Object speeding up in the  negative direction.

Following six statements:

1. T

2. F

3. T

4. T

5. F

6. T

Check direction of acceleration vector.

Answer:

The position, speed, direction and acceleration

Answer:

when an object is moving..

Answer:

Strobe light, computer monitor, tv screen all these are responsible for epilepsy seizures if some one is sensitive towards these lights.

Explanation:

Around 3% of the people are very sensitive towards to the strobe lights. The strobe light explore to the epilepsy and seizure. Certain of the visual seizures trigger to the intensities towards to the seizures. This condition of a person is called photosensitive seizures. This condition is more common among the adolescent and children.

It becomes less frequent as the age going on. It can happen with the light of tv and computer images scrolling. The intense strobe light also responsible for the seizures. If a person facing such type of problem consult to the doctor immediately. Person should avoid extreme environmental light such video games, tv screen computer monitor, strobe light, social media etc.

Answer:

A

Explanation:

Answer:

B mate

Explanation:

Answer:

The balloon needs a vertical velocity of approximately 22.14 m/s to reach the window

Explanation:

The given parameters are;

The destination of the designed water balloon we shoot = The 3rd story window

The height of the 3rd story window which the water balloon should reach = 25 m

Therefore, we have, the equation of motion of the water balloon given as follows;

v² = u² - 2 × g × s

Where;

\(u_y\) = The initial vertical velocity of the balloon

\(v_y\) = The final vertical velocity of the balloon = 0 m/s

g = The acceleration due to gravity = 9.8 m/s

s = The height the balloon is intended reach at the final velocity becomes 0 m/s = The height of the 3rd story window

∴ s = 25 m

Substituting the values, we have;

0² = \(u_y\)² - 2 × 9.8 × 25

\(u_y\)² = 2 × 9.8 × 25 = 490

\(u_y\) = √490 = 7·√10

The initial vertical velocity of the balloon = \(u_y\) = 7·√10 m/s

Therefore, the balloon needs a vertical velocity of 7·√10 m/s which is approximately 22.14 m/s to reach the window.

According to the leading scientific theory of solar system formation, the statement that best explains why Uranus and Neptune have a significantly different composition than Jupiter and Saturn is: Uranus and Neptune formed in the outer solar system, where there was less gas and dust available to build them.

According solar nebula theory, the solar system formed from the collapse of a large, dense cloud of gas and dust called a solar nebula. The material in the solar nebula was composed mostly of hydrogen and helium, but also contained heavier elements in the form of dust particles. The solar nebula began to collapse due to gravity and started to spin. As it collapsed, it formed a flat, rotating disk of gas and dust around the central star. Within this disk, small particles began to stick together to form larger and larger objects, eventually, these objects grew into the planets, moons, asteroids, and comets that make up the solar system today.

Uranus and Neptune have a significantly different composition than Jupiter and Saturn because they formed in the outer solar system, where there was less gas and dust available to build them, this meant that Uranus and Neptune were able to capture less gas from the solar nebula than Jupiter and Saturn. They are also smaller and less massive than Jupiter and Saturn, which means that they were unable to hold onto as much gas as the larger planets. As a result, Uranus and Neptune are composed mostly of water, ammonia, and methane ices, with only small amounts of hydrogen and helium gas. In contrast, Jupiter and Saturn are composed mostly of hydrogen and helium gas, with smaller amounts of water, ammonia, and methane ices.

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The answer fam is ........ The maximum height to ball rises = 122.5 m

Volcanoes are formed due to geological activity inside the Earth’s crust, where magma rises to the surface and outflows onto the ground surface. A volcanic eruption occurs when this magma rises and reaches the Earth’s surface, and the pressure forces the magma, ash, and rocks out of the volcano. Volcanoes are frequently found at continental rifts and subduction zones.

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Answer:

Velocity is a measure of both speed and direction of motion. Velocity is a vector, which is a measurement that includes both size and direction. Velocity can be represented by an arrow, with the length of the arrow representing speed and the way the arrow points representing direction.

HOPE THIS HELPP

Explanation:

Answer:

It would be A.

Explanation:

Ensuring the airway is not closed is second, and some times you may not need CPR, and you should already have told them to stop.

Answer:

A

Explanation:

just took the test

Answer:

El gasto de gasto es de aproximadamente 0.0273 pies cúbicos por segundo.

Explanation:

El gasto es el flujo volumétrico de gasolina (\(Q\)), medido en pies cúbicos por segundo, que sale de la manguera. Asumiendo que la velocidad de salida es constante, tenemos que el gasto a través de la manguera es:

\(Q = \frac{\pi}{4}\cdot D^{2}\cdot v\) (1)

Donde:

\(D\) - Diámetro de la manguera, medido en pies.

\(v\) - Velocidad medida de salida, medida en pies por segundo.

Si sabemos que \(D = \frac{1}{12}\,ft\) y \(v = 5\,\frac{ft}{s }\), entonces el gasto de gasolina es:

\(Q = \frac{\pi}{4}\cdot \left(\frac{1}{12}\,ft \right)^{2} \cdot \left(5\,\frac{ft}{s} \right)\)

\(Q \approx 0.0273\,\frac{ft^{3}}{s}\)

El gasto de gasto es de aproximadamente 0.0273 pies cúbicos por segundo.

The time elapsed between an instant when the object's speed is at a maximum and the next instant when its acceleration is at a maximum is approximately 0.34 seconds.

When an object attached to a horizontal spring is oscillating back and forth, its motion can be described by simple harmonic motion (SHM). In SHM, the object's velocity and acceleration are related to each other.

Given that the maximum speed of the object is 1.71 m/s and the maximum acceleration is 5.08 m/s², we can find the time elapsed between the two instances.

The maximum speed occurs when the object passes through its equilibrium position, where the net force acting on it is zero. At this point, the acceleration is at its maximum.

The time period (T) of the oscillation is the time taken for the object to complete one full cycle of motion. The time elapsed between the two instances in question is half of the time period, as the object reaches its maximum speed and maximum acceleration halfway through one cycle.

We can use the formulas for velocity (v) and acceleration (a) in SHM to relate the maximum speed and maximum acceleration:

v = ωA

a = ω²A

Where:

v is the maximum speed,

a is the maximum acceleration,

ω is the angular frequency, and

A is the amplitude of the oscillation.

By rearranging the equations, we can solve for ω:

ω = v / A

ω = a / √A

We know that the maximum speed is 1.71 m/s and the maximum acceleration is 5.08 m/s². Let's assume the amplitude A is constant and cancel out in the calculation:

ω = 1.71 / A

ω = 5.08 / √A

Setting the two expressions for ω equal to each other:

1.71 / A = 5.08 / √A

Squaring both sides:

2.9241 / A² = 25.8064 / A

Cross-multiplying:

25.8064 * A = 2.9241 * A²

Rearranging to the quadratic form:

2.9241 * A² - 25.8064 * A = 0

Solving this quadratic equation, we find two solutions: A = 0 or A = 8.843 m. Since the amplitude cannot be zero for non-trivial motion, we consider A = 8.843 m as the valid amplitude.

Now we can calculate the angular frequency ω:

ω = 1.71 / 8.843

ω ≈ 0.1934 rad/s

The time period T is given by:

T = 2π / ω

T ≈ 32.49 s

Finally, the time elapsed between the two instances is half of the time period:

Elapsed time = T / 2

Elapsed time ≈ 32.49 / 2

Elapsed time ≈ 16.24 s

The time elapsed between an instant when the object's speed is at a maximum and the next instant when its acceleration is at a maximum is approximately 0.34 seconds.

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The Acceleration of the system is 6.41 m/s².

Given,

α= 15°, m₁ = 7kg

β= 65°, m₂ = 11 kg

Let, a be the acceleration and T is the tensions at the end it's the cord.

Let, the mass m₂ be coming down along the inclined plane along the inclined surface towards downward m₂g sin β and the tension in the upward direction,

Resultant force, m₂a=m₂g sin β -T

11a=((11) ×g sin 65°) -T  ...(i)

Now, considering the motion of m₁ which moves downwards, the forces are m₁g sinα, and T both are acting downwards.

Resultant force m₁a = m₁g sin α+T

7a =7g sin 15°+T  ...(ii)

Solving both the equations by adding them,

18a=11gsin 65°+7g sin 15°-T+T

18a=11gsin 65°+7g sin 15°=115.45

a=115.45/18=6.41 m/s²

Hence, the Acceleration of the system is 6.41 m/s².

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Answer:

Given

velocity( v) =3m/s

momentum (p) =9kg.m/s

mass (m) =?

Form

p=mv

m=p/v

(9kg.m/s) /3m/s

p=3kg

mass =3kg

Numerical forecast models with smaller scales can predict weather phenomena with higher detail.

Numerical forecast models are computer simulations that use mathematical equations to predict future weather conditions. These models divide the atmosphere into a grid system, with each grid representing a specific area.

The size of the grid cells determines the scale of the model. Smaller-scale models have smaller grid cells and can capture more localized features and fine-scale atmospheric processes. This allows them to provide more detailed predictions of weather phenomena such as thunderstorms, local winds, and precipitation patterns.

In contrast, larger-scale models have larger grid cells and are better suited for capturing broader weather patterns like fronts and large-scale circulation. Therefore, models with smaller scales have the ability to predict weather phenomena with higher detail due to their finer resolution.

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A scientific law is an established principle that explains a phenomenon or behavior in the natural world. It is a concise statement that summarizes the results of many observations and experiments and is widely accepted as true because it has been confirmed over and over again.

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The power output of  2.00 kg object is accelerated uniformly from rest to 3.00 m/s while moving 1.5 m across a level frictionless surface is 24.09 watts.

In science, power is the time required to do work or provide energy, expressed as work done W or energy transferred divided by the time interval t - or W/t. A fixed amount of work can be done for a long time with a low-powered engine, or for a short time with a high-powered engine. The unit of power is work (or energy) per unit of time. Such as foot pounds per minute, joules (or watts) per second, and ergs per second. Force can also be expressed as the product of the force required to move an object and the object's velocity in the direction of the force. If the magnitude of the force F is measured in pounds and the velocity ν is measured in feet per minute, then the power is equal to Fν foot pounds per minute.

Given,

Mass of object (m) = 2.00 kg

Distance covered (s) = 1.5 m

Velocity of object (v) = 3.00 m/s

For calculation of acceleration:

v² = u² + 2as

3² = 0 + 2 × a × 1.5

9 = 3a

a = 2 m/s²

For calculation of time:

s = ut + ¹/₂at²

1.5 = 0 × t + ¹/₂ × 2 × t²

1.5 = t²

t = 1.22 sec.

For calculation of gravitational force:

F = mg

F = 2 × 9.8

F = 19.6 N

For calculation of work done:

W = F × s

W = 19.6 × 1.5

W = 29.4 J

For calculation of power output:

P = W/t

P = 29.4/1.22

P = 24.09 watts

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Answer:

Yes , it is possible .

Explanation:

Suppose they travelled from A to B , a distance of 800 m at a velocity of

40m /s and then come back on the same path covering a distance of 200 m at the rate of 20/ s .In other words their velocity in their return journey was -20m /s .

Net displacement = 600 m

Total time taken = (800 / 40) + (200 / 20)

= 20 + 10 = 30 s

Average velocity = net displacement / total time

= 600 / 30 = 20 m /s .

Hence average velocity of 20 m /s is possible .  

Answer:

It would take approximately 71 minutes for the heater to raise the temperature of 1.2 kg of water by 15 degrees Celsius.

Explanation:

A. The instantaneous power into the resistor is given by the expression:

pR = VR * I * cos(ωt)

B. To find the average power into the resistor, we need to take the time average of the instantaneous power over one complete cycle.

Since cos(ωt) varies from -1 to +1 over one cycle, the average value of cos(ωt) over a complete cycle is zero. Therefore, the average power into the resistor is zero.

C. The instantaneous power into the inductor is given by the expression:

pL = VL * I * cos(ωt + π/2)

D. To find the average power into the inductor, we need to take the time average of the instantaneous power over one complete cycle.

Since cos(ωt + π/2) varies from -1 to +1 over one cycle, the average value of cos(ωt + π/2) over a complete cycle is zero. Therefore, the average power into the inductor is zero.

E. The instantaneous power into the capacitor is given by the expression:

pC = VC * I * cos(ωt - π/2)

F. To find the average power into the capacitor, we need to take the time average of the instantaneous power over one complete cycle.

Since cos(ωt - π/2) varies from -1 to +1 over one cycle, the average value of cos(ωt - π/2) over a complete cycle is zero. Therefore, the average power into the capacitor is zero.

G. To show that pR + pL + pC equals p at each instant of time, we can substitute the expressions for pR, pL, and pC into the expression for p and simplify:

pR + pL + pC = VR * I * cos(ωt) + VL * I * cos(ωt + π/2) + VC * I * cos(ωt - π/2)

Using trigonometric identities, we can rewrite the expression as:

pR + pL + pC = I * [VR * cos(ωt) + VL * sin(ωt) - VC * sin(ωt)]

Notice that VR * cos(ωt) + VL * sin(ωt) - VC * sin(ωt) is equivalent to V * cos(ϕ) * cos(ωt) - V * sin(ϕ) * sin(ωt), which is the same as VI * cos(ωt) * (cos(ϕ) * cos(ωt) - sin(ϕ) * sin(ωt)).

Using the trigonometric identity cos(α - β) = cos(α) * cos(β) + sin(α) * sin(β), we can rewrite the expression as:

pR + pL + pC = VI * cos(ωt) * cos(ϕ - ωt)

Now, we see that pR + pL + pC equals p at each instant of time, as desired

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The simple evaluation technique of VT is based on the idea that threshold voltage (VT) is equal to the gate voltage at which the inversion layer charge density is zero.

Explanation:

The simple evaluation technique of VT is based on the idea that threshold voltage (VT) is equal to the gate voltage at which the inversion layer charge density is zero. When measuring the threshold voltage of a PMOS device using the VTP method, a positive voltage is applied to the drain terminal and a negative voltage is applied to the source terminal. This causes the transistor to be turned off since the body is positively biased and the PMOS channel will not conduct current. A negative voltage is then applied to the gate, which is gradually increased.

The device is turned on when the threshold voltage is reached, and the inversion layer charge density is no longer zero. Therefore, the gate voltage at which the device is turned on is equal to the threshold voltage (VT). Thus, the VTP measurement technique for PMOS devices is based on the simple evaluation technique of VT, which is the gate voltage at which the inversion layer charge density is zero.

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The equilibrium distance of A on the beam HP is 7 meters because of the increased weight which is a force at point H.

An equilibrium is utter to be stable if small, externally induced displacements from that state manufacture forces that tend to oppose the movement and return the body or particle to the equilibrium state. There are three types of equilibrium: stable, unstable, and neutral.

systematic for Equilibrium with Three Forces only. select zero degrees to be the +x-axis, and 90° to be the +y-axis. When this force system is acting on a body, equilibrium is possible only if an opposite balancing force is applied by the body (or its supports).

So we can conclude that the Equilibrium of a body is a state in which all the forces acting on the body are steady, and the net force acting on the body is zero.

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Answer: Red light

Explanation:

Answer:

Red

Explanation: