I don’t understand this question. 9th, 10th, 11th, and 12th subpart questions, please.

A 3m beam of negligible weight is balancing in equilibrium with a fulcrum placed 1m from its left end. If a force of 50N is applied on it's right end, The amount of force would need to be applied to the left end is (F)= 100N

Force is a physical phenomena that help of a object to change its motion and move its position from one end to another. It is a vector quantity. It can be measured in Newton.

To calculate the force we are using the formula,

F= f×(d₂-d₁)

Here we are given,

f= The initial force affect on the weight. = 50N

d₁= The primary distance from the weight.=1m

d₂= The secondary distance from the weight.=3m

We have to calculate the force applied on the left end.=F

Now we put the values in above equation, we get

F= f×(d₂-d₁)

Or, F= 50×(3-1)

Or, F= 100N

From the above discussion we can say that, The amount of force would need to be applied to the left end is (F)= 100N

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To model the discovery of electromagnetic induction, Tonya should use the procedure of moving a magnet into a coil of wire in a closed circuit.

Tonya should use the procedure of moving a magnet into a coil of wire in a closed circuit.

Electromagnetic induction refers to the phenomenon of generating an electric current in a conductor by varying the magnetic field passing through it. This concept was discovered by Michael Faraday in the early 19th century. To model this discovery, Tonya needs to recreate the conditions that led to this breakthrough.

In Faraday's experiment, he observed that when a magnet is moved into or out of a coil of wire, it induces an electric current in the wire. This occurs when the magnetic field passing through the coil changes. Therefore, Tonya should use a similar setup to replicate this process.

Out of the given options, the most appropriate procedure for Tonya would be to move a magnet into a coil of wire in a closed circuit. By having a closed circuit, it means that the ends of the wire are connected to form a complete loop. When the magnet is moved into the coil, the changing magnetic field induces an electric current to flow through the wire.

This procedure demonstrates the principle of electromagnetic induction and shows how a changing magnetic field can produce an electric current. It allows Tonya to visually observe the effects of the induced current, which is essential in modeling the discovery of electromagnetic induction.

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The magnitude of the electric field is 39 volts per meter and negative is the field directed toward plate 1.

The degree of labour required to transfer a unit of electric charge from a starting point to a particular spot in an electric field is known as the electric potential. Earth is typically chosen as the reference point, but any location outside the range of the electric field charge can be utilized.

The force per charge on the test charge is a straightforward method for determining the size of the electric field.  As an electric field is defined as a force per charge, the power units are divided by charge units which will ultimately be the units of an electrical field.

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Answer:

yes 20 characters or more

Explanation:

Answer:

gap junctions,tight junctions,and desmosomes

Option A is correct.

Equivalent Resultant force = 5850 N down acting 4.85 m to the right of p.

Equivalent Resultant Force is a single force that can replace a system of forces acting on a body or structure without altering the motion or equilibrium of the body or structure. The equivalent resultant force has the same effect as the original system of forces in terms of their combined magnitude, direction, and point of application.

In other words, the equivalent resultant force is the net force acting on a body or structure, which has the same effect as the original system of forces.

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Answer:

Acceleration is the rate at which the velocity changes .

Answer:

For example, the toes are anterior to the heel, and the popliteus is posterior to the patella. Superior and inferior, which describe a position above (superior) or below (inferior) another part of the body. For example, the orbits are superior to the oris, and the pelvis is inferior to the abdomen.

Explanation:

The resultant velocity of the golf ball is 18.03 m/s

What is Resultant velocity?

An object's total vector velocity is the sum of its component vector velocities. The scalar product of an object's mass and acceleration vector equals the sum of the vector forces acting on it. If indeed the two objects stick together again after impact, divide the total momentum even by sum of the masses. You will then be given the two objects' resultant velocity as a result. In the aforementioned example, 50 would be divided by the total mass of the masses, which really is 10, yielding a speed of 5 metres per second.

Horizontal velocity= 10 m/s

Vertical velocity= 15 m/s

Resultant velocity= \(\sqrt{100+225}\) = \(\sqrt{325}\) = 18.03 m/s

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Answer:

10 s

Explanation:

u  =  0 m/s

v  =  20 m/s                          

a  =  2 m/s²                          

t   =  ?                                

                                  a  =  \(\frac{v - u}{t}\)  

                                  2  = (20 - 0)/ t

                                  t   =  10 s

Answer:

The (latent) heat of vaporization (∆Hvap) also known as the enthalpy of vaporization or evaporation, is the amount of energy (enthalpy) that must be added to a liquid substance, to transform a given quantity of the substance into a gas.

The enthalpy of vaporization is a function of the pressure at which that transformation takes place. The heat of vaporization diminishes with increasing temperature and it vanishes completely at a certain point called the critical temperature (Critical temperature for water: 373.946 °C  or 705.103 °F,  Critical pressure: 220.6 bar = 22.06 MPa  = 3200 psi ).

The point on the image that is the source of the sound / sound waves travelling would be B. 2.

When a sound is produced, such as a musical note or spoken word, it initiates a disturbance at the source, which sets the surrounding particles in motion. As these particles oscillate back and forth, they generate regions of compression and rarefaction, resulting in the formation of longitudinal waves.

The propagation of sound waves emanates from a central source, radiating outward in a spherical pattern, thereby creating an expanding wavefront. This fundamental principle of wave behavior stems from the point-source nature of sound waves, wherein they originate from a central locus and disperse in all directions.

This central source in the image is 2.

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Answer:

the answer is the formula of acceleration is m/s²

We have to use the law of conservation of momentum, which states the following.

Using the definition of momentum (p = mv), we have the following.

Using the given magnitudes, we replace them and we solve for the velocity of the lead car.

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The statement that the sailboat ends up seven miles to the west is true because that it depicts displacement, a vector quantity.

The vector quantity known as displacement stands for distance with a directional component. As a result, displacement is defined as a distance and a direction.

Contrarily, distance is the amount of space between two locations, typically those that are geographical, and is typically (though not always) measured along a straight line. It has no direction because it is a scalar quantity.

The primary distinction between the two terms is as follows: A scalar quantity known as distance measures "how much ground an object has traversed" while moving.

The answer to this query places a sailboat 7 miles west of a pier. This indicates displacement because the magnitude is 7 and the direction is west of the pier.

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Answer:

2.54 seconds

Explanation:

The period of a swing on a playground swing set can be calculated using the formula:

T = 2π√(L/g)

where T is the period, L is the length of the swing's chain, and g is the acceleration due to gravity, which is approximately 9.81 m/s².

Substituting the given values, we get:

T = 2π√(4.0 m/9.81 m/s²)

T = 2π√0.407

T = 2.54 s (rounded to two significant figures)

Therefore, the period of the swing is 2.54 seconds.

Hope this helps!

C, the autonomic system :)

If a mass fell into water, the water's internal energy would increase due to the conversion of the kinetic energy of the falling mass into thermal energy.

When the mass hits the water, it will experience a force from the water, and this force will cause the mass to decelerate and eventually come to a stop. During this process, the kinetic energy of the mass is converted into thermal energy of the water, which increases the water's internal energy.

The amount by which the water's internal energy increases will depend on several factors, including the mass of the falling object, its velocity, and the properties of the water, such as its specific heat capacity and temperature. Additionally, the temperature of the water may rise due to the energy transfer from the falling object, which would further increase its internal energy.

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Explanation:

m = 4kg

u = 20m/s

t = 10s

v = 60m/s

initial momentum = mass × initial velocity

= 4 × 20 = 80kgm/s

Answer: C: Amount of Water

Explanation: Because we have the water cycle, the amount of water on the Earth has never changed, it just gets filtered and reused.

According to the diagram the equivalent resistance of the group is

40.05 ohms

The equivalent resistance is calculated by investigating the diagram to note that R2 and R3 are in parallel and both are in series to R1

Resistors in parallel is solved by

Resistors in parallel = 1/25.4 + 1/70.8

Resistors in parallel = 0.0535 ohms

Equivalent resistance

Equivalent resistance = Resistors in parallel + Resistor in series

Equivalent resistance = 0.0535 + 40

Equivalent resistance = 40.0535

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Answer:

here is answer!

Explanation:

Question 1:

Light bends when it transitions from air to glass due to differences in refractive indices. It follows an incident path in air, refracts at the air-glass boundary, and continues through the glass as a transmitted ray. Total internal reflection may occur if the angle of incidence is large enough.

Question 2:

Brightness in the wave model of light is determined by the amplitude and intensity of the light waves. Higher amplitudes and intensities correspond to brighter light. When multiple light waves overlap, their amplitudes add up, resulting in increased brightness

Answer:

31

Explanation:

At time t = 4.00 seconds, the rocket' s velocity is **20.70 m/s**.

The speed of something in a specific direction is called its velocity. It is a physical vector quantity, and its definition requires both its magnitude and its direction. Velocity is the rate at which the rocket's position changes in relation to time while it is traveling in a straight line.

The following equation describes the position of a rocket flying in a straight line: x(t) = (5.30 m/s) t+ (4.10 m/s²) - 2 - (3.20 m).

In order to determine the speed of this object at time t = 4.00 seconds,

We must determine the position function's derivative with respect to time2. x(t) has a derivative with v(t) = 5.30 m/s.+ 2(4.10 m/s²)t².

Substituting t = 4.00 seconds

(4.00 s) = 5.30 m/s + 2(4.10 m/s²)

(4.00 s) = **20.70 m/s**

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Rate of change of mechanical energy of damped oscillation, dE/dt = -bv² is proven.

Damped oscillation is the type of oscillation during which the amplitude of the oscillation decreases with time. Damped oscillation occurs due to dissipating forces like resistance, viscosity, etc

Here,

1. (a) Total energy for a damped oscillation is,

       E = 1/2 mv² + 1/2 kx²

    Taking derivatives with respect to time,

      dE/dt = 1/2m 2v(dv/dt) + 1/2k 2x(dx/dt)

      dE/dt =mav + kxv

      dE/dt = v(ma + kx)

  We know, for a damped oscillation, the restoring force, F = -bv

  So, dE/dt = v(-bv)

  Therefore, dE/dt = -bv²

(b) m = 0.4 kg

    k = 300 N/m

i) Frequency, f = (1/2\(\pi\)) [√(k/m) - (b²/2m)]

      f = 4.056 s⁻¹

ii) For critically damped oscillation,

   b = √4mk = √4x 0.4x 300

   b = 21.9 kg/s

2. F = 120 N

   m = 700 kg

   v = 1 m/s

(a) F = -bv

    b = F/v = 120/1

    b = 120 kg/s

(b) x = 2 m

    F = 450 N

i) F = kx

 k = F/x = 450/2

 k = 225 N/m

ii) A = A₀ e⁻λt     where λ = b/2m

  A = A₀/100

  A₀/100 = A₀ e⁻λt

    e⁻λt = 10⁻²

     λt = 2

      t = 2/λ = 4m/b = 4x 700/120

      t = 23.3 s

(3) λ = 4m

    v = 16 km/h = 4.44 m/s

   f = v/λ = 4.44/4

   f = 1.11 s⁻¹

We know that, f = 1/\(2\pi\) √(k/m)

On squaring,

  k = mf²4\(\pi\)²

  k = 1000x 1.11²x 4\(\pi\)²

  k = 48.56x 10³

We know,

  F = kx

  mg = kx

  x = k/mg = 48.56x 10³/(1200 + 320)9.8

  x = 3.26 m

After unloading,

  x' = 48.56x 10³/(1200x 9.8)

  x' =  4.13 m

So,

   ΔX = x' -x = 0.87 m

Hence,

Rate of change of mechanical energy of damped oscillation, dE/dt = -bv² is proven.

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The statement that is NOT true is "the spaces between the particles increased.

option D.

If we consider the solids and liquids, when the temperature increases the molecules gain energy and start moving in all directions. This expands the substance and the volume of the substance increases.

Similar, when the ball is heated, the volume of the ball increases due to thermal expansion.

As the temperature increases, the average kinetic energy of the particles within the ball also increases, causing them to move faster.

However, the spaces between the particles do not necessarily increase. In fact, the expansion of the ball occurs due to the particles themselves moving farther apart, but the intermolecular spacing within the ball remains relatively constant.

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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.”

Answer:

Explanation:

Assume that a single baby cries at X db

4 babies crying would be X + 10log₁₀(4) = X + 6 db