Jared would describe a square as having four equal sides and four right angles. This is Jared’s __________ of a square. A. model B. hierarchy C. feature D. concept Please select the best answer from the choices provided A B C D

The sound has a power level of 70 dB IL, and  the sound has a pressure level of 100 dB SPL.

The dB (decibel) is a logarithmic unit that is used to measure sound intensity. It is commonly used in audio engineering, electronics, and telecommunications to measure the power of signals. To calculate the dB IL of a sound that has 10-9 watts/cm2 of power, we use the following formula:

dB IL = 10 * log10 (power/reference power)

The reference power is usually set at 10-12 watts/cm2. Thus, we can calculate the dB IL as follows:

dB IL = 10 * log10 (10-9/10-12) = 70 dB IL



To calculate the dB SPL of a sound that has 0.002 dynes/cm2 of pressure, we use the following formula:

dB SPL = 20 * log10 (pressure/reference pressure)

The reference pressure is usually set at 20 µPa (micropascals). Thus, we can calculate the dB SPL as follows:

dB SPL = 20 * log10 (0.002/20x10^-6) = 100 dB SPL



In conclusion, the dB IL and dB SPL are two different ways of measuring sound intensity. The dB IL is used to measure the power of sound, while the dB SPL is used to measure the pressure of sound. They are both logarithmic units and are used extensively in audio engineering, electronics, and telecommunications.

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In the demonstration described, the charged ball traveled along a path with a vertical segment, a horizontal segment, and a diagonal segment. The potential difference along the horizontal segment can be understood by considering the electric field and potential difference concepts. Here, the electric potential difference experienced by the charged ball along the horizontal segment will be zero.

The electric potential difference, or voltage, is the work done per unit charge as it moves in an electric field. When a charged particle moves along a horizontal segment, it does not experience any change in the vertical direction, meaning that the vertical component of the electric field has no effect on the potential difference along this segment.

In this scenario, the horizontal segment implies that the charged ball is not moving closer to or further away from the source of the electric field. Therefore, the electric potential difference experienced by the charged ball along the horizontal segment will be zero. This is because the work done on the charged ball by the electric field along the horizontal path is zero, as there is no change in the ball's distance from the source of the field in this direction.

In summary, the potential difference along the horizontal segment of the path is zero, as there is no work done on the charged ball by the electric field in the horizontal direction.

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Answer:

To find the range and time of flight of the elf, we need to use the equations of motion under the influence of gravity. The range is the horizontal distance covered by the elf and the time of flight is the total time that the elf is in the air.

The initial velocity of the elf in the x-direction (horizontal direction) is 25 m/s and the initial velocity in the y-direction (vertical direction) is 0 m/s, since the elf is thrown horizontally from the top of the iceberg. The acceleration due to gravity is -9.8 m/s^2 in the downward direction.

Using these values, we can find the range and time of flight of the elf using the following equations:

Range:

x = x0 + v0x*t

Where x is the range, x0 is the initial position (in this case, x0 is 0 since the elf is thrown from the top of the iceberg), v0x is the initial velocity in the x-direction (25 m/s), and t is the time of flight.

Time of flight:

y = y0 + v0y*t + (1/2)at^2

Where y is the vertical position of the elf, y0 is the initial position (in this case, y0 is 110 m since the elf is thrown from the top of the iceberg), v0y is the initial velocity in the y-direction (0 m/s), a is the acceleration due to gravity (-9.8 m/s^2), and t is the time of flight.

We can solve for t in the second equation and then substitute it into the first equation to find the range.

Solving for t in the second equation:

t = (-v0y +/- sqrt(v0y^2 - 4a(y0 - y))) / (2*a)

Where y is the vertical position of the elf (0 m since the elf lands on the ground), y0 is the initial position (110 m), v0y is the initial velocity in the y-direction (0 m/s), and a is the acceleration due to gravity (-9.8 m/s^2).

Substituting this expression for t into the first equation:

x = x0 + v0x*((-v0y +/- sqrt(v0y^2 - 4a(y0 - y))) / (2*a))

Plugging in the values:

x = 0 + 25*((-0 + sqrt(0^2 - 4*(-9.8)(110))) / (2(-9.8)))

Simplifying:

x = 25*(sqrt(5832) / -19.6)

x = 25*(sqrt(5832) / -19.6)

x = (25*74.6) / -19.6

x = 1865.4 / -19.6

x = -95.1 m

So, the range of the elf is approximately -95.1 m. This means that the elf lands 95.1 m to the left of the starting point (the top of the iceberg).

The time of flight can be found by solving for t in the second equation:

t = (-v0y +/- sqrt(v0y^2 - 4a(y0 - y))) / (2*a)

Plugging in the values:

t =

Explanation:

Answer:

The nail is driven into the wood so that it would hold into the wood because if the wood was driven to the nail it may not stay and it would take way to much effort.

Explanation:

We can say that the downward gravitational pull of the Earth on the car and the upward contact force of the Earth on it are equal and opposite because the two forces form an interaction pair.

According to Newton's Third Law of Motion, for every action force, there is an equal and opposite reaction force. In the case of the car at rest, the action force is the gravitational force exerted on the car by the Earth, which is directed downwards. The reaction force is the contact force exerted on the car by the Earth, which is directed upwards.

Since these two forces are equal and opposite, we can conclude that the net force on the car is zero. Mathematically, we can represent this as:

F_gravity = -F_contact

where F_gravity is the gravitational force exerted on the car by the Earth, and F_contact is the contact force exerted on the car by the Earth.

By adding the two forces, we get:

F_net = F_gravity + F_contact = 0

This means that the car is in a state of equilibrium, and there is no net force acting on it.

In conclusion, we can conclude that the downward gravitational pull of the Earth on the car and the upward contact force of the Earth on it are equal and opposite because the two forces form an interaction pair. This relationship is explained by Newton's Third Law of Motion, which states that every action force has an equal and opposite reaction force. Since the net force on the car is zero, it is in a state of equilibrium.

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Answer:

metamorpic rock

Explanation:

it has a crystallin textures

Answer:

Joules

Explanation:

The unit for Energy is Joules, which is equal to kg m²/s².

The gravitational potential energy is calculated as:

Where m is mass (kg), g is gravity (m/s²) and h is the height (m). So, the unit of the potential energy is:

Therefore, the answer is joules.

Answer:

300 Hz.

Explanation:

The frequency of a sound wave is the same as that of the source. For example, a tuning fork vibrating at a given frequency would produce sound waves that oscillate at the same frequency.

The frequency that you will hear when the tuning fork is stuck against a table is 300 Hz.

Frequency is a measurement of how often a repetitive event occurs in a given amount of time. It is commonly used to describe the rate at which waves oscillate or vibrate. The unit of frequency is hertz (Hz), which represents the number of cycles or oscillations per second.

For example, in the case of sound waves, frequency is related to the pitch of the sound. Higher frequency sound waves have a higher pitch, while lower frequency sound waves have a lower pitch. Similarly, in the case of electromagnetic waves such as light, frequency is related to the color of the light. Higher frequency electromagnetic waves correspond to colors such as blue and violet, while lower frequency electromagnetic waves correspond to colors such as red and orange.

The relationship between frequency, wavelength, and the speed of the wave is given by the formula:

frequency = speed of the wave / wavelength

This formula shows that the frequency of a wave is inversely proportional to its wavelength, assuming the speed of the wave remains constant. In other words, as the wavelength of a wave increases, its frequency decreases, and vice versa.

Frequency is an important concept in many fields, including physics, engineering, and communications. It is used to describe and analyze a wide range of phenomena, from the behavior of sound and light waves to the performance of electronic circuits and systems.

Here in the Question,

When a tuning fork is struck against a table, it vibrates at its natural frequency, which is determined by its physical properties such as its mass, shape, and material. The vibration of the tuning fork creates sound waves that travel through the air, and our ears perceive these waves as sound.

The frequency of the sound that we hear depends on the frequency of the sound waves that reach our ears. When the sound waves from the tuning fork travel through the air, they undergo a phenomenon called the Doppler effect, which causes the frequency of the sound waves to change depending on the relative motion between the source of the sound waves (the tuning fork) and the observer (our ears).

If the tuning fork is stuck against a table and is not moving relative to the observer, the frequency of the sound waves that reach our ears will be the same as the natural frequency of the tuning fork, which is given as 300 Hz in this case.

Therefore, the frequency that you will hear when the tuning fork is stuck against a table is 300 Hz.

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The momentum of the particle is 5.43×10^1 kg⋅m/s.

Based on the information given, we have a particle with a mass of 1.81×10−3 kg and a charge of 1.22×10−8 C. The particle has a velocity vector v =(3.00×104 m/s)j^.

To find the momentum of the particle, we can use the formula: momentum = mass x velocity.  

Multiply the mass of the particle by the magnitude of its velocity.
\(1.81×10−3 kg x 3.00×104 m/s = 5.43×10^1 kg⋅m/s.\)
The momentum of the particle is \(5.43×10^1 kg⋅m/s.\)

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We cannot determine the net force acting on the particle without the electric field information. However, we know that the particle is experiencing a gravitational force of 1.772×10−2N and is moving upwards with a velocity of 3.00×104m/s in the y-direction.

The given particle has a mass of 1.81×10−3kg and a charge of 1.22×10−8C. At a given instant, it has a velocity of v⃗ =(3.00×104m/s)j^.

To analyze the motion of the particle, we need to consider the forces acting on it. In this case, we have an electric force due to the particle's charge and a gravitational force due to its mass.

The electric force (Fe) can be calculated using the formula Fe = qE, where q is the charge of the particle and E is the electric field. However, the electric field is not given, so we cannot calculate the electric force.

The gravitational force (Fg) can be calculated using the formula Fg = mg, where m is the mass of the particle and g is the acceleration due to gravity. Given that m = 1.81×10−3kg and g ≈ 9.8 m/s², we can calculate the gravitational force.

Fg = (1.81×10−3kg) * (9.8 m/s²) = 1.772×10−2N

Since we do not have the electric field value, we cannot determine the net force acting on the particle. However, we can still analyze the motion based on the given velocity.

The velocity vector v⃗ =(3.00×104m/s)j^ indicates that the particle is moving in the positive y-direction (upwards) with a magnitude of 3.00×104m/s.

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The weight of an object, measured to the nearest gram, is an example of quantitative data.

Quantitative data is numerical data that can be measured and expressed using numbers. In this case, the weight of an object is being measured in grams, which is a unit of measurement for weight. Additionally, the fact that the measurement is being made to the nearest gram means that it is a precise measurement. This type of data is often used in scientific research and other fields where precise measurements are important.

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The fringes will be farther apart

The width of the centre maxima on a screen is twice the distance between the dark fringes on either side at a distance L away: The pattern of light spreads out as you get further away from the screen (bigger L). The pattern of light widens as the hole gets smaller (smaller a).

The double-slit experiment involves directing a beam of light at a wall that has two vertical slits. The pattern that results from the light passing through the slits is captured on a photographic plate. A single line of light is seen when one slit is covered, aligned with the open slit.

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In the lecture, various factors that strengthen conformity were discussed.

Conformity refers to the tendency of individuals to adjust their behavior, attitudes, and beliefs to match those of a group. Several factors were identified in the lecture that can strengthen conformity. These factors include the size of the majority, unanimity of the group, social status and expertise of the group members, and the public nature of responses. The larger the majority and the greater the unanimity within the group, the more likely individuals are to conform. Additionally, when group members are perceived as having high social status or expertise, individuals are more likely to conform. Lastly, when responses are public and individuals feel evaluated by others, conformity tends to increase. These factors play a significant role in shaping and strengthening conformity in various social contexts.

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Explanation:

I don't completely know the answer to this question but you can check out numerade that app should help you with your question

If a bowling ball collides with a tennis ball, bowling ball the object has the larger impact force on a tennis ball, the tennis ball would have greater acceleration .

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum .

Force = Mass × Acceleration

Thus, a Tennis ball would accelerate faster if a bowling ball and a tennis ball collided since the bowling ball had a bigger impact force .

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Answer:

\(f=7.5\times 10^{14}\ Hz\)

Explanation:

Given that,

The wavelength of light, \(\lambda=400\ nm=400\times 10^{-9}\ m\)

The speed of light, \(c=3\times 10^8\ m/s\)

We need to find the frequency of light. We know that,

\(c=f\lambda\)

Where

f is the frequency

So,

\(f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{400\times 10^{-9}}\\\\f=7.5\times 10^{14}\ Hz\)

So, the frequency of light is \(7.5\times 10^{14}\ Hz\).

Answer:

gas vibrates and moves freely at high speeds.

Explanation:

Hope this helps

Answer: 10^23

Explanation:10 times 10

Answer:

= 26.94 m/s

Explanation:

given,

angle of inclination = 30°

mass of the sleigh = 200 kg

coefficient of kinetic friction = 0.2

height of inclination = 10 m

pull force be = 5000 N

now,.

T - f_s - mg sin \theta = m aT−f

s

−mgsinθ=ma

T - \mu N - mg sin \theta = m aT−μN−mgsinθ=ma

T - \mu mg - mg sin \theta = m aT−μmg−mgsinθ=ma

a = \dfrac{T}{m} - \mu g - g sin \thetaa=

m

T

−μg−gsinθ

a = \dfrac{5000}{200} - \0.2\times 9.8 - 9.8 \times sin 30^0a=

200

5000

−\0.2×9.8−9.8×sin30

0

a = 18.14\ m/s^2a=18.14 m/s

2

L = \dfrac{10}{sin 30}L=

sin30

10

L = 20 m

v² = u² + 2 as

v² = 0 + 2 x 18.14 x 20

v = 26.94 m/s

Answer:

The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.

Answer:

Increased lean muscle tissue.

Explanation:

I hope this helps :) Tell me if I am wrong!

Answer:

Increased lean muscle tissue.

Explanation:

i took the test!

Answer:

I believe it is 13,419 joules.

Explanation:

I could be very wrong, please fact check me

The height of the wall to protect from the ocean will be 200 meters

A structural engineer is using this table to design a wall to protect a city near the ocean the height of the wall will be 200 meters.

It is given in the graph that from 2009 to 2011 the highest peak of the ocean waves reached the height between 150 to 200 meters.

So the structural engineer should consider the data given in the graph that is more than the highest peak given in the graph so the height of the wall will be 200 meters

Thus the height of the wall to protect from the ocean will be 200 meters

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Since the magnetic flux through a coil of wire containing two loops changes at a constant rate from -58 wb to 38 wb in 0. 34 s, the emf induced in the coil is -5.65 V

The induced emf in the coil is given by ε = -NΔΦ/Δt where

Since ε = -NΔΦ/Δt

ε = -N(Φ₂ - Φ₁)/(t₂ - t₁)

Substituting the values of the variables into the equation, we have

ε = -N(Φ₂ - Φ₁)/(t₂ - t₁)

ε = -2(38 Wb - (-58 Wb))/(34 s - 0 s)

ε = -2(38 Wb + 58 Wb)/(34 s - 0 s)

ε = -2(96 Wb)/34 s

ε = -192 Wb/34 s

ε = -5.65 Wb/s

ε = -5.65 V

So, the emf induced in the coil is -5.65 V

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The electrical action generated by a non-electrical source, measured in volts. The emf induced in the coil is -564.7 V.

The electrical action generated by a non-electrical source, measured in volts, is referred to as emf or electromotive force. Devices, such as batteries or generators, generate an emf by converting various sources of energy into electrical energy.

The emf induced in a coil is given by

\(\varepsilon = \dfrac{-N \times \triangle \phi}{ \triangle t}\)

where

ΔΦ is the change in magnetic flux, Δt is the change in time, and N is the number of loops.

Given that the initial magnetic flux is -58 Wb while the final magnetic flux is 38 Wb. Also, the change in time is 0.34 seconds and the number of loops is 2. Therefore, the emf induced can be written as,

\(\varepsilon = \dfrac{-N \times \triangle \phi}{ \triangle t}\)

\(\varepsilon = \dfrac{-(2) \times [38-(-58)]}{0.34}\\\\\varepsilon = -564.7\rm\ V\)

Hence, the emf induced in the coil is -564.7 V.

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Answer:

The word "normal" in the phrase "normal force" indicates that: The force exerted by a surface is perpendicular to itself.

Explanation:

The Normal force refers to:

we can say that,

The standard force on the object lying on some surface is equivalent to the force of gravity.

generally The normal force is denoted with "N"

N = m*g

where m is mass of an object and g is gravitational acceleration.

hence

The word "normal" in the phrase "normal force" indicates that: The force exerted by a surface is perpendicular to itself.

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The first successful attempt to establish the size of Earth is credited to the ancient Greek mathematician and astronomer Eratosthenes.

Eratosthenes noticed that at noon on the summer solstice, the sun was directly overhead in Syene, a city in southern Egypt, casting no shadow. However, in Alexandria, which was located about 500 miles north of Syene, the sun cast a shadow of approximately 7.2 degrees. Eratosthenes realized that the difference in the shadow length was caused by the curvature of the Earth's surface, and he used his knowledge of geometry to calculate the circumference of the Earth.

Eratosthenes' estimate was remarkably accurate, coming within about 2% of the Earth's actual circumference. His achievement laid the groundwork for future studies of Earth's size and shape and cemented his legacy as one of the greatest scientists of antiquity.

So,the first successful attempt to establish the size of Earth is credited to the ancient Greek mathematician and astronomer Eratosthenes. He was born in Cyrene, a Greek colony in present-day Libya, in 276 BCE and was the chief librarian at the Library of Alexandria in Egypt.

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The simple pendulum concept and rotational kinematics relationships allow finding the result for the velocity relationship

               w₁ = \(\sqrt{2}\)  w₂

The simple harmonic movement is a periodic movement where the restoring force is proportional to the elongation, in the case of the simple pendulum it is fulfilled for angles less than 10º.  The expression for motion is

          θ  = θ₀ cos ωt

         ω² = g / l

the angular velocity is defined by

         w = \(\frac{d \theta}{dt}\)  

         w = - θ₀ ω sin ωt

Where θ₀ is the initial angle or amplitude, w is the angular velocity, t the time, g the acceleration of gravity and l the length of the pendulum

Let's find the angular velocity for each pendulum

          ω ₁ = \(\sqrt{ \frac{g}{l_1} }\)

Indicate that the second pendulum length is

          l₂ = 2 l₁

         ω₂ = \(\sqrt{\frac{g}{2l_1} }\)  

the pendulum speed is maximum at the lowest point of the trajectory that occurs when the sine function has its maximum value

          w =  θ₀ω  

Suppose that the two pendulums are released with the same initial angle

Pendulum 1

          w₁ =  θ₀ \(\sqrt{\frac{g}{l_1} }\)

Pendulum 2

          w₂ = θ₀  \(\sqrt{\frac{g}{2l_1} }\)

We look for the relationship between the two speeds

           \(\frac{w_1}{w_2} = \sqrt{2}\)  

In conclusion, using the simple pendulum concept and the rotational kinematics relations we can find the result for the velocity relation

             w₁ = √2 w₂

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Answer:

Taking the value of acceleration due to gravity as 9.8 m/s^2, the object fell for about 122.5 metres.

Answer:

128J

Explanation:

K.E = MV² ÷ 2

K.E = 16 × 4² ÷ 2

K.E = 16 × 16 ÷ 2

K.E = 256 ÷ 2

K.E = 128J

:. it's kinetic energy is 128Joules(J)