2. David Wechsler took the results of IQ tests and plotted them on a bell curve. What BEST demonstrates what Wechsler learned by plotting the results on the Bell Curve?
Most scores were above average.
Most scores were below average..
O
Most scores fell in the middle of the curve with fewer outside the curve.
There was a large difference between the scores of women and men.

In a case whereby the lowest pitch that the average human can hear has a frequency of 28.0 Hz sound with this frequency travels through air with a speed of 331M/S  the wave length is

Frequency refers to the number of vibrations measured each second. A wave is a collection of vibrations known as energy. The top node is referred to as the trough, and the bottom node as the crest.

λ = wave velocity/frequency

λ = 331 m/s / 28 Hz

λ = 11.82 m

As a result, the lowest pitch that a typical person can hear is at a frequency of 29 Hz. The wavelength of sound at this frequency is 11.82 m as it moves through air at a speed of 331 m/s.

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Answer:

The question is not complete, here is the other part.

Assume that n = 1.36.

Express your answer to three significant figures and include the appropriate units.

λ = 707.2nm

Explanation:

n = 1.36

t = 130

2 n t= (m+1/2) λ

To solve for λ.

λ = 2 n t ÷ m+1/2

λ = 2 × 1.36 × 130 ÷ m +1/2

λ =

If m= 0

λ= 353.6 ÷ 0+ 1/2

λ = 353.6 × 2

= 707.2nm

Answer:

Force and pressure

Explanation:

Pressure is inversely proportional to area

Or by using:

Force and pressure

Of course a burnt nail is “ scorched “ meaning it doesn’t have that much “ power “ or it an chip away

Force and pressure

People use drugs for many reasons: they want to feel good, stop feeling bad, or perform better in school or at work, or they are curious because others are doing it and they want to fit in. The last reason is very common among teens.Drugs excite the parts of the brain that make you feel good. But after you take a drug for a while, the feel-good parts of your brain get used to it. Then you need to take more of the drug to get the same good feeling. Soon, your brain and body must have the drug just to feel normal. You feel sick, awful, anxious, and irritable without the drug. You no longer have the good feelings that you had when you first used the drug. This is true if you use illegal drugs or if you misuse prescription drugs. Misuse includes taking a drug differently than how your doctor tells you to (taking more or crushing pills to "shoot up" or snort), taking someone else’s prescription, or taking it just to get “high.”

Given data

The sliding distance is s = 3 m

The angle of inclination is 41 degree

The friction coefficient is 0.23

The free-body diagram of the above configuratin is shown below:

The expression for the force in the direction of motion is given as:

The expression for the velocity at the bottom is given as:

Thus, the velocity of the boy at the bottom is 5.327 m/s.

The magnetic field is oriented in the xy plane at an angle of 75 degrees from the +x axis, the angle between the magnetic field and the normal to the loop is 75 degrees, so the net torque on the loop is 0.203 Nm.

The net torque on a current-carrying loop in a magnetic field is given by the equation: Torque = (B × I × A × sin(theta))

where torque is the net torque on the loop, B is the magnitude of the magnetic field, I is the current in the wire, A is the area of the loop, and theta is the angle between the magnetic field and the normal to the loop.

In this case, the radius of the loop is 15 cm = 0.15 m, so the area of the loop is A = pi × r² = pi × (0.15 m)² = 0.07 m²

The current in the wire is 2.7 amps, and the magnitude of the magnetic field is 0.12 Tesla.

If the magnetic field is oriented parallel to the +x axis, the angle between the magnetic field and the normal to the loop is 0 degrees, so the net torque on the loop is: Torque = (0.12 Tesla × 2.7 amps × 0.07 m² × sin(0)) = 0 Nm

If the magnetic field is oriented to the +z axis, the angle between the magnetic field and the normal to the loop is 90 degrees, so the net torque on the loop is: Torque = (0.12 Tesla × 2.7 amps × 0.07 m² × sin(90)) = 0.252 Nm

If the magnetic field is oriented in the xy plane at an angle of 75 degrees from the +x axis, the angle between the magnetic field and the normal to the loop is 75 degrees, so the net torque on the loop is: Torque = (0.12 Tesla × 2.7 amps × 0.07 m² × sin(75)) = 0.203 Nm

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Answer:

positive

proton and neutron

electron

The minimum mass required to be placed on the 0.00 cm mark of the meter stick to maintain equilibrium is 0.120 kg.

To maintain equilibrium, the torques acting on the meter stick must balance each other. The torque is given by the formula:

τ = r * F * sin(θ)

where τ is the torque, r is the distance from the pivot point to the point where the force is applied, F is the force applied, and θ is the angle between the force vector and the lever arm.

In this case, the meter stick is in equilibrium when the torques on both sides of the pivot point cancel each other out. The torque due to the weight of the meter stick itself is acting at the center of mass of the meter stick, which is at the 50.0 cm mark.

Let's denote the mass to be placed on the 0.00 cm mark as M. The torque due to the weight of M can be calculated as:

τ_M = r_M * F_M * sin(θ)

where r_M is the distance from the pivot point to the 0.00 cm mark (which is 30.0 cm), F_M is the weight of M, and θ is the angle between the weight vector and the lever arm.

Since the system is in equilibrium, the torques on both sides of the pivot point must be equal:

τ_M = τ_stick

r_M * F_M * sin(θ) = r_stick * F_stick * sin(θ)

Substituting the given values:

30.0 cm * F_M = 20.0 cm * (0.0400 kg * 9.8 m/s^2)

Solving for F_M:

F_M = (20.0 cm / 30.0 cm) * (0.0400 kg * 9.8 m/s^2)

F_M = 0.0264 kg * 9.8 m/s^2

F_M = 0.25872 N

Finally, we can convert the force into mass using the formula:

F = m * g

0.25872 N = M * 9.8 m/s^2

M = 0.0264 kg

Therefore, the minimum mass required to be placed on the 0.00 cm mark of the meter stick to maintain equilibrium is 0.120 kg.

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Sound waves are a type of mechanical wave that propagate through a medium, typically air but also other materials such as water or solids.

Frequency: the frequency of a sound wave refers to the number of cycles or vibrations it completes per second and is measured in Hertz (Hz).

Amplitude: the amplitude of a sound wave refers to the maximum displacement or intensity of the wave from its equilibrium position. It represents the loudness or volume of the sound, with larger amplitudes corresponding to louder sounds and smaller amplitudes corresponding to softer sounds.

Wavelength: the wavelength of a sound wave is the distance between two consecutive points in the wave that are in phase, such as from one peak to the next or one trough to the next. It is inversely related to the frequency of the wave.

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Answer:

Firstly it is not equilibrium but equilibrant. resultant is a single force that can replace the effect of a number of forces, while equilibrant is a force that is exactly opposite to a resultant. equilibrant and resultant have equal magnitude but opposite direction.

Answer:

Explanation:

B. Central Nervous System

Answer:

It will be cut in half

Explanation:

The diffraction of a slit is given by the formula

a sin θ = m where

a = width of the slit,

λ = wavelength and

m = integer that determines the order of diffraction.

Next we divide both sides by a, we have

sin θ = m λ / a

Also, recall that

a’ = 2 a

Then we substitute in the previous equation

2asin θ' = m λ, if divide by 2a, we have

sin θ' = (m λ / 2a).

Now again, from the first equation, we said that sin θ = m λ / a, so we substitute

sin θ ’= sin θ / 2

Then we use trigonometry to find the width, we say

tan θ = y / L

Since the angle is small, we then have

tan θ = sin θ / cos θ

tan θ = sin θ, this then means that

sin θ = y / L

we will then substitute

y’ / L = y/L 1/2

y' = y / 2

this means that when the slit width is doubled the pattern width will then be halved

Answer:

A

Explanation:

A constant velocity means the position graph has a constant slope. It's a straight line sloping up.

The orientation of an mRNA codon corresponding to a tRNA anticodon is best described as A: antiparallel.

An anticodon is a three-base sequence, paired with a particular amino acid, that a tRNA molecule brings to the associated codon of the mRNA during translation. The anticodon sequence is said to be complementary to the mRNA, using base pairs in the anti-parallel direction.  The tRNA anticodon 3-UAC-5 will make pair with the mRNA codon.

Thus, the orientation of an mRNA codon relative to a tRNA anticodon is said to be antiparallel.

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If a third resistor is added in SERIES, what changes happens to the....

When you add a third resistor in series, the total resistance of the circuit increases. This is because the current has to flow through all three resistors, so it has to overcome more resistance. The total voltage across the circuit stays the same, because the voltage of the battery is constant. However, the current decreases, because the same amount of current is now flowing through a larger resistance.

The voltage across each resistor also decreases, because the total voltage is divided among the three resistors. The current through each resistor also decreases, because the same current is now flowing through a larger resistance.

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Given data

*The given internal energy is U = 140 J

*The given heat is Q = 60 J

The formula for the work can be done by the gas is given as

Substitute the known values in the above expression as

Here the negative sign indicates that the work can be done by the gas.

Explanation:

Given that,

Current, I = 0.015 A

Voltage, V = 240 volts

We need to find the resistance. Using Ohm's law we can find it as follows :

\(V=IR\\\\R=\dfrac{V}{I}\\\\R=\dfrac{240}{0.015}\\\\R=16000\ \Omega\)

So, When a current of 0.015 A passes through human body at 240 volts p.d it  causes​  16000 ohms of resistance.

The car is moving at approximately 12.5 meters per second.

The kinetic energy (KE) of an object can be calculated using the formula:

KE = 1/2 * m * \(v^2\)

where

KE = kinetic energy,

m =Mass of the object, and

v = velocity.

In this case, we are given the mass (m) of the car as 1600 kg and the kinetic energy (KE) as 125,000 J. To find the velocity .

Substituting the  values , we have:

125,000 J = 1/2 * 1600 kg *\(v^2\)

Now, we can solve for v by rearranging the equation:

\(v^2\) = (2 * 125,000 J) / 1600 kg

\(v^2\) = 156.25 \(m^2/s^2\)

Taking the square root, we find:

v = √156.25\(m^2/s^2\)

v ≈ 12.5 m/s

Therefore, the car is moving at approximately 12.5 meters per second.

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Answer:

  I₃ /I₀ = 25%

Explanation:

For this exercise let's use Malus's law

         I = I₀ cos² θ

where tea is the angle between the two polarizers.

When the polarized light passes the first polarizer, the intensity is constant if it is in the direction of polarization.

        I₁ = I₀

the light transmitted by the second polarizer is

        I₂ = I₁ cos² θ

        I₂ = I₀ cos² 45

        I₂ = I₀ 0.5

this light is polarized 45º with respect to the first polarizer

Now let's examine the third polarizer, it is indicated that it has an angle of 90º with respect to the first polarizer, the angle with respect to the second polarizer is

        θ = 90 - 45

        θ = 45º

so the polarizer is at an angle of 45º

let's use Maus's law

         I₃ = I₂ cos² 45

         I₃ = I₀ 0.5 cos² 45

         I₃ = I₀ 0.25

the light that passes through the system is

         I₃ /I₀ = 0.25

as a percentage we multiply by 100

         I₃ /I₀ = 25%

Explanation:

the efficiency of a machine can be increased by reducing the friction

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The two strings are taut. When the system is released from rest, it accelerates at 2 m/s2 then, Mass of A = 8m/5 kg.

Let the mass of the body A be ‘m’.

The two strings are taut so they exert a tension ‘T’ on body A.

Let ‘a’ be the acceleration produced in the system.

The free body diagram of body A is given below: mA + 2T = mA + ma = mA + m(2)mA + 10T = mA + ma = mA + m(2)

As the two strings are taut, we can say that tension in both strings is equal.

Therefore 2T = 10T or T = 5T As the body A is resting on a smooth horizontal table, there is no friction force acting on the body A.

The net force acting on body A is the force due to tension in the strings. ma = 2T – mg …(1)

As per the given problem, the system is released from rest.

Hence the initial velocity is zero.

Also, we are given that the system accelerates at 2 m/s2.

Therefore a = 2 m/s2 …(2)

From the equations (1) and (2), we get, m(2) = 2T – mg …(3)⇒ m(2) = 2×5m – mg⇒ 2m = 10m – g⇒ g = 8m/5

Thus, the mass of A is 8m/5 kg.

Answer: Mass of A = 8m/5 kg.

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Answer:

The acceleration of cars in the United States is stated as a "zero to sixty" time, where vi is zero and vf is 60 miles per hour or 27 meters per second. The average rate of acceleration of all the ordinary cars I found was between 3 and 4 m/s2.

It takes 2 seconds for her to stop the buggy.

Given that the speed of buggy is u = 2m/s

deceleration a = 1 \(m/s^2\)

When the buggy stops, its final speed is v = 0 m/s

Now, from the first equation motion, for decelerated motion

v = u - at  , where t is the time taken

0 = 2 - 1×t

t = 2s

Hence, it takes 2 seconds to stop the buggy.

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Answer:

A binary star is a star system consisting of two stars orbiting around their common barycenter.

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The horizontal component of the electric field is -209.625 n/c.

What is Electric Field?

Electric fields are forces created by the presence of an electric charge. An electric field can be created by either a positive charge or a negative charge. Electric fields exert a force on objects with an electric charge, causing them to move and interact with each other. Electric fields can also be used to transfer energy from one place to another. Electric fields are produced by electric charges, or by time-varying magnetic fields. The electric field is a vector field, meaning it has both a magnitude and a direction associated with it at each point in space. The strength of the electric field is determined by the amount of charge present and the distance from the charge.

What does Magnetic field mean?

A magnetic field is an invisible force field created by an electric current or a magnet. It is an area of influence created by a magnet or electric current that can attract and repel other magnets or electric currents. Magnetic fields are used in a variety of applications, from consumer electronics to medical scanners.Magnetic fields are created by moving electric charges, such as electrons, and can be measured in units of teslas. They are responsible for the force that causes magnets to attract and repel each other, and they also determine the direction of the force.

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Answer:

100

Explanation:

F = m * a

Given that the mass (m) of the toy car is 20 grams (or 0.02 kilograms, since 1 kilogram = 1000 grams) and the acceleration (a) is 5 m/s^2, we can plug these values into the formula to calculate the force (F):

F = 0.02 kg * 5 m/s^2 = 0.1 N

So, the amount of force required to accelerate the 20 gram toy car at 5 m/s^2 is 0.1 N, which is equivalent to 100 N when rounded to the nearest whole number. Therefore, the correct answer is 100 N.

Yes, it is correct. The results may be considered reliable if the chance of an outcome due to chance is less than 5%.

What do you mean by experiments?

Experiment is a method of testing a hypothesis or theory by observing the results of an action under controlled conditions. Experiments help scientists to learn how certain variables interact and influence one another, and can be used to test theories and develop new ideas.

However, it is important to note that there are other factors to consider when assessing the reliability of results, such as the accuracy of the measurements and the quality of the data.

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Answer:

The answer to the question is 7200

Answer:

There is no sound in space because there are no molecules there to transmit the sound waves. Electromagnetic waves are not like sound waves because they do not need molecules to travel. This means that electromagnetic waves can travel through air, solid objects and even space.