An oil drop of mass 3.25X10^-15 kg falls vertically with uniform velocity, through the air between vertical parallel plates which are 2 cm apart. When a p.d. of 1000V is applied to the plates ,the drop moves to the positively charged plate, being inclined at 45 degree to the vertical . Calculate the charge on the drop.

Answer:

I believe it is 13,419 joules.

Explanation:

I could be very wrong, please fact check me

Answer:

KE increases and PE decreases.

Explanation:

POTENTIAL ENERGY (PE):

The potential energy of the rock depends upon the height of the rock, as given by the following formula:

P.E = mgh

Therefore, the potential energy will be highest at the initial point due to the highest height attained by rock. As the rock falls, its height will decrease as a result its potential energy will also decrease.

KINETIC ENERGY (KE):

The kinetic energy of the rock depends upon the velocity of the rock, as given by the following formula:

\(K.E = \frac{1}{2}mv^2\)

Therefore, the kinetic energy will be zero at the initial point due to the zero velocity of the rock. As the rock falls, its velocity will increase as a result its kinetic energy will also increase.

Hence, the correct option will be:

KE increases and PE decreases.

Answer:

12 meters and 2 n

Explanation:

16 -  u = 6 (8.0 + 11)

The difference between longitudinal and transverse waves is with respect to their mediums.

Transverse waves and longitudinal waves are two different forms of waves that differ in the direction that the medium is moving. When the medium's vibration is parallel to the wave direction, a transverse wave is produced. At a right angle to the wave's direction of travel, amplitude is recorded. When the medium being employed vibrates parallel to direction of wave, longitudinal waves are produced.

Amplitude is measured at a zero-degree angle to the wave's travel direction. Transverse waves include crests and troughs, whereas longitudinal waves have compressions and rarefactions. While longitudinal waves can move through fluids like liquids and gases, transverse waves need a relatively rigid medium to do so.

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The magnitude of the source charge is 3 μC which generates 4286 N/C of the electric field. Option B is correct.

What does Gauss Law state?

It states that the electric flux across any closed surface is directly proportional to the net electric charge enclosed by the surface.

\(Q = \dfrac {ER^2}k\)

Where,

\(E\) = electric force = 4286 N/C

\(k\) = Coulomb constant = \(8.99 \times 10^9 \rm\ N m ^2 /C ^2\)

\(Q\\ \)     = charges = ?

\(r\) = distance of separation = 2.5 m

Put the values in the formula,

\(Q = \dfrac {4286\times 2.5 ^2}{8.99 \times 10^9 }\\\\ Q = 3\rm \ \mu C\)

Therefore, the magnitude of the source charge is 3 μC.

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Answer:

Strong base

Explanation:

A strong base usually has the pH of between 12 to 14

If the pH of a solution is 12.4, the substance is called a Strong base. Hence, option C is correct.

When a substance is dissolved in water, H⁺ hydrogen ions are formed. These substances are called Acids. H⁺ ions are positive ions and hence, they donate protons to other substances.

When a substance is dissolved in water, OH⁻ hydroxyl ions are formed. These substances are called Bases. OH⁻ ions are negative ions that are capable of accepting the protons/hydrogen ions.

Acids are substances having more hydrogen ions than hydroxyl ions and it has a sour taste. Bases are substances having more hydroxyl ions than hydrogen ions and it has a bitter taste.

The acids and bases are differentiated by using the pH scale. pH represents the potential of hydrogen which measures the hydrogen and hydroxyl ions. It is a negative logarithm of H⁺ ion concentration.

The pH scale ranges from 0-14. The neutral power in the pH scale is 7 and the water shows the neutral range. If pH shows less than 7 it is an acidic solution and litmus paper turns red.        

If pH shows greater than 7, it is a base or alkaline solution and the litmus paper turns blue.  Weak bases range from 7.3-10. Strong bases range from 10-14.  

Hence, the pH shows 12.4, which represents a strong base. Thus, the correct solution is C.  

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Answer:

Though nuclear energy is a very efficient source of energy, it is not a resource that is utilized well. there is less dependence on nuclear resources for energy production due to the nuclear waste,proliferation and national security.

I am pretty much sure for this!

1. Disposal problem

The disposal of nuclear waste is a major problem and if not disposed properly, it can cause harm to abiotic and biotic resources.

2. Security problem

The security is another problem, if there is any malfunction then life is threatened.

That's why economies are seeking other ways of energy production.

Pressing a lever in the box's corner is the sole method to get rid of the shocks. The rat picks up pressing the lever quite quickly. This is an illustration of negative reinforcement.

The technique of negative reinforcement can be applied to aid in teaching particular actions.

When something unpleasant or uncomfortable is taken away in response to a stimulus, this is known as negative reinforcement.

Target behavior should gradually grow better with the hope that the unpleasant item will go away.

A rat is placed in an environment where the floor gives the rat small electric shocks. The only way to get rid of the shocks is to press a lever in the corner of the box.

The rat quickly learns to press the lever. This is an example of  negative reinforcement

Hence the given condition is an example of negative reinforcement.

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Answer:

The magnetic field remains the same.

Explanation:

If a solenoid has length L, N windings, and radius b, then the magnetic field inside the solenoid is given by :

\(B=\mu_o NI\)

\(\mu_o\) is magnetic permeability

If the radius of the solenoid were doubled and all other quantities remained the same, the magnetic field inside the solenoid would remains the same as it is independent of the radius of the solenoid.

The point p on the x-axis that minimizes the sum of distances pq and pr is (2.5, 0).

        Length of pq: sqrt((x-0)^2 + (0-6)^2) = sqrt(x^2 + 36)

        Length of pr: sqrt((x-5)^2 + (0-7)^2) = sqrt((x-5)^2 + 49)

        sqrt(x^2 + 36) + sqrt((x-5)^2 + 49)

        d/dx [sqrt(x^2 + 36) + sqrt((x-5)^2 + 49)] = 0

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Answer:

a) 50 rad/s

b) 39.8 rev

Explanation:

Given:

r = 0.36 m

v₀ = 0 m/s

a = 1.8 m/s

t = 10 s

a) Find: ω

v = at + v₀

v = (1.8 m/s) (10 s) + (0 m/s)

v = 18 m/s

ω = (18 m/s) / (0.36 m)

ω = 50 rad/s

b) Find: Δθ

Δx = v₀ t + ½ at²

Δx = (0 m/s) (10 s) + ½ (1.8 m/s) (10 s)²

Δx = 90 m

Δθ = (90 m) / (2π × 0.36 m)

Δθ = 39.8 rev

The sky on Earth is blue because blue light is scattered through the atmosphere as the other colors of light pass through undisturbed. Dark nebulae  have something similar going on.

Nebulae are interstellar dust and gas clouds that get backlighting from stars both inside and behind them. The clouds are illuminated by the photons from these stars that are dispersed throughout them. A nebula does not generate most of the light that appears to come from it; rather, it reflects and refracted light.

A dark nebula, also known as an absorption nebula, is a form of interstellar cloud, particularly a molecular cloud, that is so dense that it absorbs all of the light from objects behind it, including emission or reflection nebulae and background stars, at visible wavelengths.

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Answer:

Respect the client’s decision

Explanation:

just took the test

Answer: Respect the client's decision

Explanation: Either way the professional would know not to do anything rash and it is the client's decision whether or not they want to move forward, it would have obviously been a touchy subject if they were that reluctant.

An equilateral triangle is a triangle whose sides are all equal in length and has three equal angles of 60° each. To draw an equilateral triangle with sides of length 5, you can use a compass and a ruler to measure 5 cm. Using the compass, place the needle at one end of the line segment and draw an arc that intersects the line segment at another point.

Place the needle on the intersection point and draw another arc that intersects the first arc at a third point. The line segments connecting the three points are all of equal length 5 and form an equilateral triangle.To draw an altitude in an equilateral triangle, we need to drop a perpendicular line from one of the vertices to the opposite side. This line is known as the altitude.

When the altitude is drawn, it creates two smaller right-angled triangles with the base of the equilateral triangle. We can use this to find the length of the altitude.To find the length of the altitude of the equilateral triangle with sides of length 5, we need to use the Pythagorean theorem since we know that the smaller right-angled triangles have a base of 2.5 (half the side length) and a hypotenuse of 5 (side length). Using a² + b² = c², where a and b are the legs of the right triangle and c is the hypotenuse, we get:a² + (2.5)² = (5)²a² + 6.25 = 25a² = 18.75a ≈ 4.33.

Therefore, the length of the altitude is approximately 4.33 units.To compute the trigonometric ratios of this triangle, we can use the sides and altitude of the equilateral triangle. Using SOHCAHTOA (sine, cosine, tangent, cosecant, secant, and cotangent), we can find the ratios for the angles of the triangle.Sin(60°) = Opposite/Hypotenuse = 4.33/5 = 0.866Cos(60°) = Adjacent/Hypotenuse = 2.5/5 = 0.5Tan(60°) = Opposite/Adjacent = 4.33/2.5 = 1.732Cosecant(60°) = Hypotenuse/Opposite = 5/4.33 = 1.154Secant(60°) = Hypotenuse/Adjacent = 5/2.5 = 2Cotangent(60°) = Adjacent/Opposite = 2.5/4.33 = 0.577

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The correct answer is 0.513 Nm torque must be applied to the wheel for its angular acceleration to be 135 rad/s2.

Torque is the rotating equivalent of force in physics and mechanics. Depending on the subject of study, it is also known as the moment, moment of force, rotating force, or turning effect. It illustrates how a force can cause a change in the body's rotational motion. In his famous adage, "Give me a lever and a place to stand, and I shall move the Earth," Archimedes, who studied the use of levers, is credited with developing the idea. Torque can be thought of as a twist to an item about a particular axis, much as a linear force is a push or a pull.

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Answer:

In a physical change a substance changes from one PHASE to another

Answer:

wave x has greater amplitude

If the initial direction of the rotation of the wheel is reversed, then the seated demonstrator will rotate counterclockwise with increased angular speed When the wheel is spun with its initial direction of rotation, it begins to rotate with the help of torque.

The torque exerted on the wheel when it is rotating in the clockwise direction and that when it is rotating in the counterclockwise direction are different. This is due to the right-hand rule of torque, which determines that the torque exerted on an object is always perpendicular to the plane of rotation and follows the direction of the force are the applied. Therefore, if we reverse the wheel's initial direction of rotation, the direction of the torque exerted on it would also reverse, which means it would be exerted in the opposite direction. Since the new torque would be greater than the previous torque, the angular speed of the seated demonstrator will increase, and they will rotate counterclockwise with increased angular speed.

further understand why the seated demonstrator would rotate counterclockwise with increased angular speed if the initial direction of rotation of the wheel is reversed, we need to understand the relationship between torque and angular speed. Angular speed is a measure of how fast an object is rotating. It is defined as the angle through which an object rotates in a given amount of time. On the other hand, torque is the force that causes an object to rotate. It is defined as the product of the force applied and the distance from the axis of rotation at which the force is applied.

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The work done by the electric field on the proton as it moves 10 cm is 8.0 × 10^(-17) J.

The work done by an electric field on a charged particle can be calculated using the equation:

W = q * E * d * cos(theta)

Where:

W is the work done,

q is the charge of the particle,

E is the strength of the electric field,

d is the displacement of the particle,

theta is the angle between the electric field and the displacement vector.

In this case, the proton has a charge of q = +1.6 × 10^(-19) C, the electric field has a strength of E = 500 N/C, and the displacement is d = 10 cm = 10 × 10^(-2) m. Since the electric field is uniform, the angle theta between the electric field and the displacement vector is 0 degrees.

Plugging in the values, we have:

W = (1.6 × 10^(-19) C) * (500 N/C) * (10 × 10^(-2) m) * cos(0 degrees)

cos(0 degrees) = 1

W = (1.6 × 10^(-19) C) * (500 N/C) * (10 × 10^(-2) m) * 1

W = (1.6 × 10^(-19) C) * (500 N/C) * (10 × 10^(-2) m)

W = 8.0 × 10^(-17) J

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Answer:

ethylene

Explanation:

ethylene is a compound consist of two double bonded carbon atom and four hydrogen atoms at room temperature is a gas

Answer:

Ethylene

Explanation:

Because Ethylene is a simple molecule composed of two double-bonded carbon atoms and four hydrogen atoms. It's a gas at room temperature. Ethylene molecules can be chemically bonded, end to end, to form a polymer named polyethylene.

Answer:

I would say increasing the balls kinetic energy

Explanation:

Because she is moving the ball and increasing kinetic energy

RFID (Radio Frequency Identification) tags have their own transmitter and a power source, typically a battery.

RFID tags are small electronic devices that can be attached to or embedded in various objects, allowing them to be tracked and identified using radio waves.

These tags contain a microchip that stores information about the object they are attached to, and a transmitter that sends this information wirelessly to an RFID reader.

There are two types of RFID tags: active and passive.

Active RFID tags have their own power source (typically a battery) and can transmit information over longer distances than passive tags, which rely on the energy of the RFID reader to transmit their information.

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The resistance of the lamp is approximately 2.857 ohms.

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, given a constant temperature. Mathematically, it can be expressed as V = IR, where V is the voltage, I is the current, and R is the resistance of the conductor.

To calculate the resistance of the lamp, we can use Ohm's law.
Given that the lamp is connected to a 2 V DC power supply and the current through the lamp is 0.7 A, we can plug these values into the equation:

R = V/I
R = 2 V / 0.7 A

R = 2.857 ohm

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doubling the inductance in a series RLC circuit will result in a halving of the resonance frequency, while doubling the peak electromotive force will not affect the resonance frequency.

Part B:

If the inductance (L) of a series RLC circuit is doubled, the resonance frequency (f) will change. The resonance frequency is given by the formula:

f = 1 / (2π√(LC))

Assuming the capacitance (C) remains constant, doubling the inductance (L) would result in halving the value of the square root of (LC). Therefore, the resonance frequency would decrease by a factor of √2.

Thus, the new resonance frequency (f') can be calculated as:

f' = f / √2

Part D:

If the peak electromotive force (E₀) is doubled in a series RLC circuit, it does not affect the resonance frequency. The resonance frequency depends on the values of the inductance (L) and capacitance (C) in the circuit and is independent of the amplitude of the applied voltage.

In summary, doubling the inductance in a series RLC circuit will result in a halving of the resonance frequency, while doubling the peak electromotive force will not affect the resonance frequency.

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Answer:

my only true question is b

The drill's angular acceleration is 431.37 radians per second squared.

Part A: To find the drill's angular acceleration, we need to use the formula:

angular acceleration = (final angular velocity - initial angular velocity) / time

We are given the final angular velocity as 2100 rpm, which we need to convert to radians per second:

2100 rpm * (2π radians / 1 revolution) * (1 minute / 60 seconds) = 220 radians per second

Since the drill starts from rest, the initial angular velocity is 0. We are also given the time as 0.51 seconds. Plugging in these values into the formula, we get:

angular acceleration = (220 radians per second - 0 radians per second) / 0.51 seconds

Simplifying, we get:

angular acceleration = 431.37 radians per second squared

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Answer:

Potassium and iodine

Explanation: I took the quick check

The highest-order number that can be observed with this grating using diffraction formula is 1/1555.

It is determined using the formula for diffraction: mλ = d sinθ. Where m is the order number, λ is the wavelength of light, d is the grating spacing, and θ is the angle of diffraction. In this case, the grating has 1555 lines/cm, which means the grating spacing is 1/1555 cm.

To determine the highest-order number, calculate m × (565 × 10^-9 meters) = (1/1555 cm) × sinθ, where θ must be less than or equal to 90 degrees to satisfy sinθ ≤ 1. Given the wavelength of light as 565 nm (or 565 × 10^-9 meters), we can proceed with the calculation. Since sinθ ≤ 1, the highest-order number (m) can be determined by substituting θ = 90 degrees into the equation: m = (1/1555 cm) × sin(90 degrees).

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Avoidant or anxious-ambivalent attachment is more common in children with insecure attachment.

Insecure attachment can be caused by a number of factors including inconsistent care, neglect, or trauma. Children who experience insecure attachment may have difficulty forming and maintaining close relationships later in life. Avoidant attachment is characterized by a child who avoids seeking comfort or support from their caregiver, while anxious-ambivalent attachment is characterized by a child who is both clingy and resistant to their caregiver's attempts to comfort them. Both of these attachment styles can be seen in children with insecure attachment, and can lead to difficulties in forming healthy relationships as an adult. It is important to note that attachment styles are not set in stone and can be changed with positive experiences and therapeutic interventions.

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