FILL IN THE BLANK helen is administering an intelligence test to children to determine if they have a learning disorder. she should be sure to ____.

Explanation:

The underlying physics give rise to periodic behavior. Usually, some resonance is involved, in which the media damps waves except those at a specific frequency.

__

Only waves at a specific frequency are recognized as being "stationary." If the frequency varies, the behavior is described as "chaotic." So, it's partly a matter of definition.

1.When the non-sticky sides of the two pieces of tape recording are brought together, they repel each other. This is due to the buildup of electric charge on the  face of the tape recording when it was  hulled off from the flat  face.

2.The pieces didn't change when the tape recording was from different sets.  When two top or two  nethermost pieces of tape recording are brought together, they repel each other.

3.When a top and  nethermost piece of tape recording are brought together, they attract each other. This is  harmonious with the actuality of only two types of charge, positive and negative. The results support the fact that the top and  nethermost pieces of tape recording had  contrary charges.  The top tape recording attracted the arm hair, while the bottom tape recording didn't attract the arm hair. Arm hair is  generally neutral, but it can be  concentrated by the electric field of the charged tape recording.

4.The top tape recording is negatively charged, and it  concentrated the arm hair, which has a positive charge. This redounded in  magnet between the top tape recording and the arm hair.  The pieces of tape recording labeled" T1" and" B2" are  appreciatively charged, while the pieces of tape recording labeled" B1" and" T2" are negatively charged. This can be determined from the  compliances.

5.When the  appreciatively charged tape recording was brought  near to a negatively charged tape recording, they attracted each other. When two  appreciatively charged  videotapes or two negatively charged  videotapes were brought  near together, they repelled each other.  Like charges repel each other,  contrary charges attract each other, and neutral bodies aren't affected by electric fields.  

6.The force of  magnet or aversion between the pieces of tape recording increases as they get  near together and decreases as they move  further  piecemeal. This change happens gradationally, not  snappily.      

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The string that will break first depends on the weight of the block or bar subjected to such string.

According to Hook's law, the force applied to an elastic material is directly proportional to the extension of the material.

F= kx

where;

For given two identical strings, the string that will break first depends on the mass of the bar and the block.

Thus, the string that will break first depends on the weight of the block or bar subjected to such string.

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Answer:

in water its more slower because of the liquid matter but in air its a gas formaiton so its more quicker

Explanation:

We do not observe the wave-like nature of an object such as a quickly rolling bowling ball because the length of the wave is much shorter than the diameter of the ball.

As far as we know, matter possesses both wavelike and particle-like characteristics.  According to de Broglie hypothesis, waves flow in straight lines and exhibit minimal interference when they come into contact with things that are significantly bigger than their wavelength (for example light rays in geometric optics). The longest wavelength &, therefore, the lightest mass achievable would be beneficial to obtain easily seen interference mostly from matter particles. Thus, this phenomenon was first noticed in electrons. A wave must come into contact with an object that is similar in size just like its wavelength to produce noticeable interference effects. Furthermore, we might assert that wave nature only reveals itself in tiny things like electrons and neutrons.

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Answer:

32 m/s².

Explanation:

From the question given above, the following data were obtained:

Mass (m) of cart = 120 Kg

Radius (r) = 15 m

Velocity (v) = 22 m/s

Centripetal acceleration (a) =?

The centripetal acceleration experienced by the cart can be obtained as illustrated below:

a = v²/r

a = 22² / 15

a = 484 / 15

a = 32.27 ≈ 32 m/s²

Thus, the centripetal acceleration experienced by the cart is approximately 32 m/s².

form is an element of design that describes volume and mass ; the three dimensional aspects of objects that take up space is True.

Form is an element of design that refers to the three-dimensional aspects of objects, including volume and mass. It describes the physical shape and structure of an object, emphasizing its spatial presence and how it occupies and interacts with space. Form plays a crucial role in creating visual interest, defining the character of objects, and shaping the overall composition in various design disciplines, such as architecture, industrial design, and sculpture.

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Answer:

It is imjportant to study rocks because geology gives an untouvhed pice of our history. Rocks can tell about our past, whether it is weather, animals, plants, tools, climate, or anything else, rocks can help solve world problems.

Answer:

Explanation:

The important part about this problem is the acceleration, which you must find by using

F = ma,

where F is the force applied,

m is the mass,

and a is the acceleration.

F = ma

10.1 N = (12.3 kg)a

a = 0.8211 m/s^2

Now use the kinematics equations.

d = vot + (1/2)at^2

where d is the distance moved,

vo is the initial velocity (0),

a is the acceleration,

and t is the time.

d = vot + (1/2)at^2

d = (0 m/s)(2.5 s) + (1/2)(0.8211 m/s^2)(2.5 s)^2

d = 2.57 m

a. The acceleration of the cart, is 0.821 \(m/s^2\).

b. The car moved a distance of 30.63 meters starting from rest.

Given the following data:

a. To find the acceleration of the cart, we would apply Newton's Second Law of Motion:

Mathematically, Newton's Second Law of Motion is given by this formula;

\(Acceleration = \frac{Force}{Mass}\)

Substituting the given values, we have;

\(Acceleration = \frac{10.1}{12.3}\)

Acceleration = 0.821 \(m/s^2\)

Therefore, the acceleration of the cart, is 0.821 \(m/s^2\).

b. To find the distance covered by the shopping cart, we would use the second equation of motion.

Mathematically, the second equation of motion is given by the formula;

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

Where:

Substituting the values into the formula, we have;

\(S = 0(2.5) + \frac{1}{2} (9.8)(2.5)^2\\\\S = 0 + 4.9(6.25)\)

Distance, S = 30.63 meters.

Therefore, the car moved a distance of 30.63 meters starting from rest.

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Answer:

The female birds find more attractive which option is likely to happen is discussed below in detail.

Explanation:

All About Robins and How to Attract Them - Natural Birds Unlimited | Wild Birds Unlimited. These birds are interested to inaugurate grasslands and gardens with seasoned underbrush and trees. While they consume a variety of pests and grains or seeds, it has been remarked that they can consume up to 5 meters of earthworms in a day.

Wave variables

In the section on motion in two dimensions, we defined the phrases below to describe harmonic motion:

The amount by which a moving object deviates from its equilibrium position is known as its amplitude.

The number of events per unit of time is known as frequency.

Period is how long an oscillation lasts.

The underlying relevance of each of these factors for waves is the same. But it's helpful to express the ideas in a way that expressly mentions waves: Amplitude is the distance a wave travels between its resting state and its maximum movement.

The quantity of waves that pass by a specific location each second is known as its frequency.

Period is the length of time a wave cycle lasts.

In addition to their wave length and wave velocity, waves are determined by amplitude, frequency, and period.

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Answer:

the wavelength of the electromagnetic wave with a frequency is approximately 0.111 meters or 11.1 centimeters.

the electromagnetic wave falls within the radio wave.

Explanation:

Equation:

wavelength = speed of light / frequency

Given:

Frequency = 2.7 GHz = 2.7 × 10^9 Hz

so...

wavelength = (3.00 × 10^8 m/s) / (2.7 × 10^9 Hz)

then the answer would be...

wavelength ≈ 0.111 meters or 11.1 centimeters

now regarding the second question...in the given scenario, the wavelength of 11.1 centimeters is relatively long, indicating a lower frequency. Therefore, the electromagnetic wave in question falls within the radio wave part of the electromagnetic spectrum.

Answer:

A

Explanation:

From the calculation;

1) Melting point of indium = 171.4°

2) The resistance is 52.9 ohm

3) The power dissipated is  834 W

The temperature coefficient of resistance is a measure of how much the resistance of a material changes with temperature. It quantifies the relationship between the change in resistance and the change in temperature.

We have that;

R1/R2 = (1 + αt1)/(1 + αt2)

50/76.8 = (1 + (3.92 * \(10^-3\) * 20))/(1 +  (3.92 *\(10^-3\) * t))

0.65 = 1.0784/1 + 0.00392t

0.65(1 + 0.00392t) =  1.0784

0.65 + 0.0025t = 1.0784

t = 171.4°

P = \(V^2\)/R

R = \(V^2\)/P

R = \(230^2\)/1000

R = 52.9 ohm

The new power is;

P =\(210^2\)/52.9

P = 834 W

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When there is a temperature difference/Gradient, heat flows from a region of high concentration to region of low concentration.

Thermal energy flow from region of higher temperature gradient to region of low temperature gradient till equilibrium is reached.

When the hot metal is places in a cold water bath, there will be a temperature difference and by conduction(water conducts heat) the heat will travel in the water medium and circulate till equilibrium

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An inclined plane reduces the amount of input force needed by increasing the distance over which the force is applied.

An inclined plane is a simple machine that consists of a flat surface set at an angle relative to the horizontal plane. When an object is moved up or down an inclined plane, it requires less input force compared to lifting the object vertically.

The principle behind this reduction in force is the trade-off between force and distance. By increasing the length of the incline, the inclined plane allows the force to be applied over a longer distance. This longer distance compensates for the reduction in force, resulting in a decrease in the amount of input force required to move the object.

The relationship between the input force (F_input) and the output force (F_output) on an inclined plane can be described by the formula:

F_output = F_input * sin(θ)

where θ is the angle of the incline. As the angle of the incline decreases, the force required to move the object also decreases.

An inclined plane reduces the amount of input force needed by increasing the distance over which the force is applied. This trade-off between force and distance allows objects to be moved more easily along the inclined plane compared to lifting them vertically.

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Temperature is a crucial factor in sericulture, which is the process of rearing silkworms for the production of silk. The optimal temperature range for silkworm growth and development is between 25°C and 30°C, with a relative humidity of 70-80%.

If the temperature is too low for silkworms, they grow more slowly, and their development may be delayed, resulting in lower silk production. This is because silkworms are cold-blooded creatures that rely on their environment to regulate their body temperature.

Temperature control is crucial in sericulture because it affects the growth, development, and survival of silkworms, which in turn affects the quality and quantity of silk production.

Maintaining the optimal temperature range helps to ensure that silkworms develop and mature quickly, produce high-quality silk, and have a low mortality rate. Temperature control also helps to prevent disease outbreaks and reduces the risk of silkworms becoming stressed and dying.

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The velocity of the trolleys after the collision will be 0.84 m/sec. Both collide and stick together and move with the same velocity.

According to the law of conservation of momentum, the momentum of the body before the collision is always equal to the momentum of the body after the collision.

The given data in the problem is;

(m₁) is the mass of S=  200 g  =0.2 Kg

(u₁) is the initial velocity of S= 0 m/s

(m₂) is the mass T= 3 x 10⁻¹ kg

(u₂) is the initial velocity of T =  1.4 m/s

(v) is the velocity after collision =.?

According to the law of conservation of momentum;

Momentum before collision =Momentum after collision

\(\rm m_1u_1 + m_2u_2 = v(m_1 + m_2)\\\\ 3 \times 10^{-1} \times 1.4 + 0.2 \times 0 = v(0.3+0.2) \\\\ 0.5v=0.42 \\\\ v= 0.84 \ m/sec\)

Hence, the velocity of the trolleys after the collision will be 0.84 m/sec.

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Answer:

Electromagnetic energy

Answer:

Water is a compound because it is made up of water molecules. There is no such thing as water atoms. Water molecules are made of hydrogen and oxygen atoms, in the definite proportion of two hydrogens for one oxygen.

Answer:

Approximately \(0.388\; {\rm s}\), assuming that air resistance is negligible and that \(g = 9.81\; {\rm m\cdot s^{-2}}\).

Explanation:

Initial vertical velocity of the object: \(u = 11.0\; {\rm m\cdot s^{-1}}\), upwards (same as that of the rollercoaster.)

Initial height of the object: \(h_{0} = 5.00\; {\rm m}\).

If air resistance is negligible, this object will accelerate downwards at a constant \(a = (-g) = (-9.81)\; {\rm m\cdot s^{-2}}\). Note that \(a\) is negative since the object is accelerating downwards.

The SUVAT equation \(h = (1/2)\, a\, t^{2} + u\, t + h_{0}\) gives the height \(h\) of this object at time \(t\). Note that while the initial height is \(5.00\; {\rm m}\), \(h = 0\) when the object reaches the ground.

Since acceleration \(a\), initial velocity \(u\), and initial height \(h_{0}\) are all given, setting \(h\!\) to \(0\) and solving for \(t\) will give the time it takes for this object to reach the ground:

\((1/2)\, a\, t^{2} + u\, t + h_{0} = 0\).

\((1/2)\, (-9.81) \, t^{2} + 11.0\, t + 5.00 = 0\).

\((-4.905)\, t^{2} + 11.0\, t + 5.00 = 0\).

Solve this equation for \(t\!\) using the quadratic formula. Note that \(t > 0\) since \(t\) denotes the amount of time required for the object to reach the ground.

\(\begin{aligned} t &= \frac{-11.0 + \sqrt{11.0^{2} - 4 \times (-4.905) \times 5.00}}{2\times (-4.905)} \\ &\approx 0.388\; {\rm s}\end{aligned}\).

The other root of this quadratic equation is negative and isn't a valid solution to the question.

In other words, it will take approximately \(0.388\; {\rm s}\) for this object to reach the ground.

When a wire is stretched to twice its initial length, its resistance increases by a factor of 4.

The resistance of a wire is directly proportional to its length, and inversely proportional to its cross-sectional area. When a wire is stretched to twice its initial length, its cross-sectional area is reduced to one-fourth of its original value. Therefore, the resistance of the wire increases by a factor of 4 (i.e., 2²). This can be seen from the equation R = (ρL)/A, where R is resistance, ρ is resistivity, L is length, and A is cross-sectional area. When the length of the wire is doubled, the resistance becomes twice its original value. However, the reduction in the cross-sectional area also contributes to an increase in resistance, making it four times the original value.

In conclusion, when a wire is stretched to twice its initial length, its resistance increases by a factor of 4 due to the reduction in its cross-sectional area.

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The displacement of the ball is zero.

What is displacement?

The smallest distance between the initial and final position of an object.

What are the equations of motion?

There are three equations of motion that completely describes the motion of an object.

The first equation of motion gives the relationship between the initial velocity, final velocity, acceleration, and time.

The second equation of motion gives the relationship between the initial velocity, displacement, acceleration, and time.

The third equation of motion gives the relationship between the initial velocity, final velocity, acceleration, and displacement.

Given time, initial velocity, and acceleration, the displacement can be calculated using the second equation of motion. The second equation of motion is,

s=u*t+(1/2)*a*t^2

Here, u=25 m/sec, a=-25 m/sec and t=2.0 sec.

Put the values in the formula and calculate the displacement.

s= (25)*(2.0)+(1/2)*(-25)*(2.0)^2

s=50-50

s=0 m.

Hence the displacement of the ball is zero.

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Answer:

1. is held

2. was

3. be cancelled

4. has been moved

5. is being filmed

Explanation:

If you read them out, you can find out which ones flow the best! Hope this helps!

Answer:

80 amperes

Explanation:

Current = Voltage/Resistance

160/2 = 80

The final angular velocity of the system is 0.612 rad/s.

We can substitute the given values (I_wheel = 0.130 kg · m^2, ω_wheel = 16.1 rad/s, I_student+stool = 3.30 kg · m^2) into the equation to find the final angular velocity (ω_final) of the system.

To analyze the situation, we need to consider the conservation of angular momentum. Initially, the student, stool, and wheel are at rest, so the total angular momentum is zero. As the student holds the spinning bicycle wheel, they exert a torque on the system, causing it to rotate.

The total initial angular momentum of the system is given by the sum of the angular momentum of the wheel (L_wheel) and the angular momentum of the student plus stool (L_student+stool), which is equal to zero.

L_initial = L_wheel + L_student+stool = 0

The angular momentum of an object is given by the product of its moment of inertia (I) and angular velocity (ω).

L = Iω

Let's denote the initial angular momentum of the wheel as L_wheel_initial, and the final angular momentum of the system as L_final.

L_wheel_initial = I_wheel * ω_wheel

The student and stool initially have zero angular velocity, so their initial angular momentum is zero:

L_student+stool_initial = 0

When the student holds the spinning wheel, the system starts to rotate. As a result, the wheel's angular momentum decreases, while the angular momentum of the student plus stool increases. However, the total angular momentum of the system remains conserved:

L_final = L_wheel_final + L_student+stool_final

Since the student and stool are initially at rest, their final angular momentum is given by:

L_student+stool_final = I_student+stool * ω_final

We can now set up the equation for the conservation of angular momentum:

L_wheel_initial + L_student+stool_initial = L_wheel_final + L_student+stool_final

Since the initial angular momentum is zero for the student and stool:

L_wheel_initial = L_wheel_final + L_student+stool_final

Substituting the expressions for angular momentum:

I_wheel * ω_wheel = I_wheel * ω_final + I_student+stool * ω_final

Now, we can solve for the final angular velocity (ω_final):

I_wheel * ω_wheel = (I_wheel + I_student+stool) * ω_final

ω_final = (I_wheel * ω_wheel) / (I_wheel + I_student+stool)

Now you can substitute the given values (I_wheel = 0.130 kg · m^2, ω_wheel = 16.1 rad/s, I_student+stool = 3.30 kg · m^2) into the equation to find the final angular velocity (ω_final) of the system.

SO, therefore, the final angular velocity  is 0.612 rad/s.

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A student holds a spinning bicycle wheel while sitting motionless on a stool that is free to rotate about a vertical axis through its center (see the figure below). The wheel spins with an angular speed of 16.1 rad/s and its initial angular momentum is directed up. The wheel's moment of inertia is 0.130 kg · m2 and the moment of inertia for the student plus stool is 3.30 kg · m2. Determine the angular speed of the system (wheel plus student plus stool) after the student turns the wheel over, changing its angular momentum direction to down, without exerting any other external forces on the system. Assume that the student and stool initially rotate with the wheel.

Answer:

transmission

Explanation:

Answer: The answer is D

Explanation:

Answer:

Igneous rocks form beneath Earth's surface.

Explanation:

Igneous rocks form beneath the Earth's surface

Answer:

P = 300 N/\(m^{2}\)

Explanation:

Pressure is the rate at which force is applied to an object per unit area.

i.e P = \(\frac{F}{A}\)

where P is the pressure, F is the force applied and A is the area.

When an elephant stands on four feet, the weight is distributed equally to the ground (all things being equal). But if an elephant stands on one foot, the weight is concentrated at a spot on the ground with respect to the area covered by his foot.

Given that, weight = 6000 N = F, and A = 20 \(m^{2}\).

Then,

P = \(\frac{6000}{20}\)

  = 300

P = 300 N/\(m^{2}\)

The pressure exerted on the floor by the elephant is 300 N/\(m^{2}\).

Explanation:

P= F/A

= 6000/20

= 300n/m². or 300 pa