what is the magnitude of positive charges stored on one plate? what is the magnitude of negative charges stored on the opposite plate?

Answer:

C

Explanation:

All of the other options are affecting the gravitational force and opposing force that pushed upwards, the diagram represents an object that is not moving up or down.

The ball will hit the ground after approximately 1.88 seconds and at a horizontal distance of approximately 34.15 ft away.

a. To find the position vector of the particle at time t, we can use the kinematic equation for motion with constant acceleration. The position vector ⃗r(t) is given by ⃗r(t) = ⃗r₀ + ⃗v₀t + 0.5⃗at², where ⃗r₀ is the initial position vector, ⃗v₀ is the initial velocity vector, ⃗a is the acceleration vector, and t is the time.

Plugging in the values, we have ⃗r(t) = (5, 0, 4) + (0, 0, 7)t + 0.5(-11, -1, -5)t², which simplifies to ⃗r(t) = (5 - 11t^2, -t, 4 - 5t^2). This gives the position vector of the particle at any given time t.

b. For the baseball, we can analyze its motion using projectile motion equations. The vertical and horizontal motions are independent of each other, except for the initial velocity. The vertical motion is affected by gravity, with an acceleration of -32 ft/s².

Using the given initial speed of 26 ft/s and the launch angle of 20 degrees, we can decompose the initial velocity into its vertical and horizontal components. The vertical component is 26 * sin(20°) ft/s, and the horizontal component is 26 * cos(20°) ft/s.

To find the time of flight, we can use the equation for vertical motion: y = y₀ + v₀yt + 0.5at². The initial vertical position is 40 ft, the initial vertical velocity is 26 * sin(20°) ft/s, and the vertical acceleration is -32 ft/s². Solving for t, we get t ≈ 1.88 seconds.

To find the horizontal distance, we use the equation x = x₀ + v₀xt, where the initial horizontal position x₀ is 0 ft (assuming the ball is thrown from the stands), the initial horizontal velocity v₀x is 26 * cos(20°) ft/s, and the time of flight t is approximately 1.88 seconds. Solving for x, we find x ≈ 34.15 ft.

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To excel at volleyball, Doug should prioritize the skill of passing. Passing is fundamental in volleyball, as it enables effective communication, smooth transitions, and sets up opportunities for successful attacks

Doug's goal to improve at volleyball is admirable, and his approach of identifying specific skills that need improvement is a good start. However, in order for him to excel at the sport, he will need to prioritize which skill to focus on first.

To determine which skill deserves the most attention, Doug should consider a few factors. Firstly, he should evaluate his current level of proficiency in each skill on his list. If there is a skill that he is particularly weak in or struggles with, that may be a good place to start.

Secondly, Doug should consider which skills are most important for his position on the volleyball team. For example, if he is a setter, improving his ability to accurately set the ball may be crucial to the team's success.

Thirdly, Doug should think about the specific strategies and tactics used in the type of volleyball he plays. For example, if he plays beach volleyball, he may need to focus on skills such as serving and blocking, which are particularly important in that style of the game.

Finally, Doug should also consider his own strengths and weaknesses as a player. If he is naturally quick and agile, he may want to focus on skills such as diving and digging, which require those attributes.

To excel at volleyball, Doug should prioritize the skill of passing. Passing is fundamental in volleyball, as it enables effective communication, smooth transitions, and sets up opportunities for successful attacks. By improving his passing, Doug will be able to contribute significantly to his team's overall performance and increase their chances of winning games.

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Answer:

F = Q V X B

V X B = south X downard = East - deflection is West

Since Q is negative the deflection = West

a = F / m = Q V B / m

a = 1.6E-19 * 5*E6 * 3.5E-5 / 9.1E-31

a = 1.6 * 5 * 3.5 / 9.1 * 10^13 m/s^2 = 3.1 * 10^13 m/s^2

The peak current through the resistor is 0.0682 A.

To calculate the peak current through the resistor, we can use Ohm's Law, which relates the voltage (V), current (I), and resistance (R) in an electrical circuit.

Ohm's Law states that the current flowing through a resistor is equal to the voltage across the resistor divided by its resistance.

In this case, the given information is an AC source with an electromotive force (EMF) of e0 = 15 V and a resistor with a resistance of 220 Ω.

We are asked to find the peak current when the frequency of the AC source is 100 Hz.

In an AC circuit, the voltage and current vary sinusoidally over time. The peak values represent the maximum values reached during one complete cycle of the waveform.

Using Ohm's Law, we can calculate the peak current as follows:

I = e0 / R

Substituting the given values:

I = 15 V / 220 Ω ≈ 0.0682 A

Therefore, the peak current through the resistor is approximately 0.0682 A.

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Answer:

1) Constants are variables that are kept the same throughout an experiment.

2) An independent variable is a variable that is manipulated by the experimenter.

3) A dependent variable is a variable that is measured by the experimenter.

Explanation:

Answer:

C. 18 s

&

B. -7 m

Explanation:

A. 12 m/s, East is a vector. It says "East" so it would be a vector. Therefore this is not our answer since it's a vector and the question is asking for which one is not a vector.

B. It says "7 m". I think that means 7 meters. That's a length. There is no direction. It's not 7 meters up, or to the east, or north. So, with no direction, it's not a vector. Therefore this is not our answer.

C. For this one it says ""18 s". I think that means "18 seconds". Since this one is not mentioned "direction" meaning it's not a vector. Since the question is asking for the ones that are not a vector this would be another answer.

D. Since this one says "miles" it means it has a direction since it has a direction it is probably a vector, since it's a vector it wouldn't be our answer. Therefore this is not our answer.

Answer:

middle

top

bottom

under neith middle

The graph that corresponds to 0.1 s in one complete cycle is graph D.

option D is the correct answer.

The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years.

Also, the period of a wave is the amount of time it takes for a wave to complete one wave cycle or wavelength.

From the given parameter, the coil rotates 10 times in one second. The period of the coil is calculated as;

Period = 1 s / 10

Period = 0.1 s

From the graphs, the only option that has one complete cycle in one second is option D.

Check option D, half cycle is 0.05 s and one full cycle is 0.1 s.

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The radiometer takes 0.16 seconds to complete one revolution based on radiation pressure.

The time it takes for the radiometer to do one revolution can be derived as follows:

The radiation pressure (P) on the radiometer is given by:

P = 2 * I / c

where I is the intensity of the radiation and c is the speed of light.

The torque (T) on the radiometer due to the radiation pressure can be calculated as:

T = r * P * A

where r is the radius of the radiometer, and A is the area of the radiometer blades.

Assuming that the radiometer is in vacuum, the torque T will cause the radiometer blades to rotate with an angular acceleration (α), given by:

α = T / I

where I is the moment of inertia of the radiometer blades.

The moment of inertia (I) of the radiometer blades can be calculated as:

I = 0.5 * m * r²

where m is the mass of the radiometer blades.

The angular velocity (ω) of the radiometer blades can be calculated from the angular acceleration (α) using the equation:

ω² = ω₀² + 2αθ

where ω₀ is the initial angular velocity, and θ is the angle of rotation.

Assuming that the initial angular velocity is zero, and the angle of rotation is 2π (one revolution), the equation simplifies to:

ω = √(4πα)

Substituting the expressions for torque (T), moment of inertia (I), and angular acceleration (α) into this equation, we get:

ω = √((8 * m * r² * I * I / (c * A)))

Simplifying this equation using the expression for moment of inertia, we get:

ω = √((2 * m * r² * P / (c * A)))

Therefore, the time (t) taken for one revolution of the radiometer is given by:

t = 2π / ω = 2π * √((c * A) / (2 * m * r² * P))

Substituting the estimated values for the variables, we get:

t = 2π * √((3 * 10⁸ * (0.01 m)²) / (2 * 10⁻⁹ kg * (0.05 m)² * 1.67 * 10⁻⁹ N/m²)) = 0.16 seconds

Therefore, the time it takes for the radiometer to do one revolution based on radiation pressure is 0.16 seconds.

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A brass axle with a volume of 0.318 cm weighs 2.7g.

Mass in physics is a quantitative representation of inertia, a fundamental property of all matter. Essentially, it relates to a substance's resistance to shifting its direction or speed in reaction to the application of a force.

You would use a balance as the tool to determine mass. The classic balance depicted here could aid in your understanding of what mass is, though you might also use a measuring cylinder or a triple beam balance in the lab to measure mass.

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Answer:

2 repel attracts light water

Answer:

A magnet has two poles.

Like poles repel each other and unlike poles attract

An electromagnet is used to separate large masses of iron scrap.

The strength of the magnetic field of an electromagnet is increased by inserting a core of soft iron.

In a torch we use a dry cell as the source of electricity.

To light a table lamp and to run a refrigerator, we use mains as the source of electricity.

A group of two or more cells is called a battery.

Conductors pass electricity through them.

The centripetal force is the force that keeps a body moving in a circular path.

The centripetal force is given by; F = mv^2/r

1) We have;

F = 5,600 N

v = 20 m/s

r =?

m = 700 kg

Making r the subject of the formula;

r =mv^2/F

r = 700 × (20)^2/5,600

r = 50 m

2) F = mv^2/r

F = 900 × (5)^2/30

F = 750 N

3) Making r the subject of the formula;

r =mv^2/F

r = 800 × (40)^2/ 16,000

r = 80 m

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The frequency received by the stationary mouse just before being dispatched by the hawk is 3215 Hz.

\(f_obs = f_emit * (v_sound + v_observer) / (v_sound + v_source)\)

\(f_obs = 3400 Hz * (343 m/s + 0 m/s) / (343 m/s + 23.0 m/s)\\f_obs = 3215 Hz\)

Frequency refers to the number of cycles or oscillations of a wave that occur per unit of time. A wave is a disturbance that propagates through a medium or space, and it can be described by its frequency, wavelength, and amplitude. The frequency of a wave is typically measured in hertz (Hz), which represents the number of cycles per second.

For example, if a wave completes 10 cycles in one second, its frequency would be 10 Hz. Higher frequencies correspond to shorter wavelengths and more energy, while lower frequencies correspond to longer wavelengths and less energy. In practical terms, frequency is important in many areas of physics, including electronics, acoustics, and optics. For example, radio waves have frequencies in the range of millions of hertz, while visible light waves have frequencies in the range of hundreds of trillions of hertz.

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The temperature change of the gas when the pressure exerted on the gas by the piston is held constant and the same quantity of heat Q0 is added to the gas will be less than ΔT0.Suppose the volume of the cylinder remains constant, the system will be isolated from the surrounding, no work will be done on the piston. Therefore, according to the first law of thermodynamics:ΔE = Q0 + W= Q0.

Where W is the work done, ΔE is the change in internal energy. For an ideal gas, the internal energy is given by U = 3/2 nRT, where R is the gas constant. Therefore, the change in internal energy for a given amount of gas will be given byΔE = 3/2 nRΔT0By the principle of conservation of energy, the heat given to the gas when it expands will be equal to the change in internal energy.

If the gas expands to a volume V1, then the new internal energy will be given byU1 = 3/2 nRT1where T1 is the new temperature of the gas. Therefore, the increase in internal energy when the gas expands will be given byΔE1 = 3/2 nR(T1 - T0)Equating the change in internal energy when the gas expands to the heat added we getQ0 = 3/2 nRΔT1.

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The reflected ray of a ray of light that makes an angle of 25° with the normal to a plane mirror and its is turned through 60°, making the angle of incidence to be 31° is rotated through 12°.

Freflection can be defined as the turning back of a ray of light when its strikes a plane's surface.

There are 2 laws of reflection

(1) The first law of reflection states that the incident ray the reflected ray and the normal all at the point of incidence lie in the same plane

(2) The second law of reflection states that the angle of incident is equal to the angle of reflection.

From the question, if the incidence ray is rotated through 6°, then the  reflected ray is rotated through 12°

Hence, The reflected ray is rotated through 12°.

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The reflection resulting in a 31° angle of incidence and the angle is the reflected ray rotated will be 12°

The law of reflection specifies that upon reflection from a downy surface, the slope of the reflected ray is similar to the slope of the incident ray.

The reflected ray is consistently in the plane determined by the incident ray and perpendicular to the surface at the point of reference of the incident ray.

When the light rays descend on the smooth surface, the angle of reflection is similar to the angle of incidence, also the incident ray, the reflected ray, and the normal to the surface all lie in a similar plane.

As a result, the reflected light is rotated by 12°.

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Answer:

true

Explanation:

because Inertia is reluctance of an object to change its initial state of rest or motion due to its MASS ,

so mass is a factor that affects motion

the higher the mass , the higher the reluctance to change its motion, the higher the inertia

hope this helps,

please mark

The drawing shows the couple acting on a tire wrench is missing and so i have attached it.

We are to find an expression for the torque when the axis is perpendicular to the tire and passes through the points A, B & C

Answer:

Point A: τ = Fl

Point B: τ = 0

Point C: - Fl

Explanation:

Formula for torque is;

τ = F × d

Where;

F is perpendicular force

d is distance.

Thus;

> At point A, it means we are taking torque about point A and so we have;

τ = (-F × 0) + (F × L)

τ = Fl

> At point B, it means we are taking torque about point B and so we have;

τ = (-F × L/2) + (F × L/2)

τ = -(FL/2) + (FL/2)

τ = 0

> At point C, it means we are taking torque about point C and so we have;

τ = (-F × L) + (F × 0)

τ = -FL

If a spherical conductor has a net positive charge, then the charge is spread evenly around the sphere's surface.

A spherical conductor is a sphere having a profusion of negative charges spread throughout the surface of the sphere.

In other words, a spherical conductor can be a metal that is a spherical, narrow, and thin conducting surface.

Since charges can move freely throughout metal and the force of repulsion between similar charges led them to the edge of the sphere.

This results in the distribution of the charge on the surface and spreads out uniformly.

In this case, a +q charge will be at a distance r from a -ve charge of -2q.

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Answer:

heterogeneous and homogeneous

Explanation:

Hetero you can separate whilst homo is combined and cant be separated

Given:

The applied force is,

The mass of the object is,

The constant velocity of the object is,

To find:

The coefficient of friction between the object and the surface

Explanation:

The object is moving with a constant velocity which means the object is under equilibrium. So, the applied force is equal to the frictional force on the object.

If the coefficient of friction between the object and the surface is

we can write the frictional force as,

For equilibrium condition,

Hence, the coefficient of friction between the object and the surface is 0.47.

A change in temperature frequently causes substances to change phases. Most substances are solid at low temperatures; as the temperature rises, they become liquid; and at still greater temperatures, they become gaseous.

Melting is the conversion of a solid into a liquid (an older term that you may see sometimes is fusion). Solidification is the process where a liquid turns into a solid. The melting point, or the temperature at which a pure substance begins to melt, is a property of that substance. A solid must expend energy to become a liquid. A specific quantity of energy is required by every pure substance in order to transform from a solid to a liquid. This amount is known as the substance's enthalpy of fusion (or heat of fusion).

The complete question is- The diagram shows how states of matter can change when energy is either added or removed.

System before change

System after change

00000

00000

00000

00000

00000

00000

00000

All of these statements below are true EXCEPT

Energy was added to the matter causing the particle movement to increase.

The matter changed states which is a physical change.

The particles in the matter before the change had more energy than after the change.

The particles in the matter before the change had less energy than after the change.

the diagram is attached below.

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Energy can neither be created nor destroyed during a chemical reaction but it can only be transformed from one form of energy to another form of energy.

Energy transformation refers to energy conversion from one form of energy to another form of energy.  such as in a hydroelectric dam that transforms the kinetic energy of water into electricity. The work of the energy transformations that take place in living organisms the leads to work.

While energy can be transformed, the total quantity of energy remains the same so  this is known as energy conservation.

So we can conclude that Energy transformation also known as energy conversion, is the procedure of changing energy.

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Answer: I think false!

Explanation: hope this helps and I hope everyone is having a good day/Friday&weekend^^

Answer:

A chemical symbol is a one- or two-letter designation of an element. Compounds are combinations of two or more elements. A chemical formula is an expression that shows the elements in a compound and the relative proportions of those elements. Many elements have symbols that derive from the Latin name for the element.

The y-component of the force on the particle at the given position is 120 N.

The electric force on the particle is determined by applying Coulomb's law and work-energy theorem as shown below;

Fd = W

Where;

F = W/d

F = 60/0.5

F = 120 N

Thus, the y-component of the force on the particle at the given position is 120 N.

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The nebular hypothesis describes that when a cloud collapses into a star system a new star is forming inside this glowing cloud of gas.

The nebular theory proposes that a rotating cloud of material called a nebula, composed primarily of light components, flattened into a protoplanetary disc and developed into a solar system made up of a star and circling planets.

The Sun originated independently from a collapsing cloud of gas and dust, and as the planets passed by it later, they were gravitationally pulled in.

Individual stars and their planets develop from the revolving clouds' flattening into protostellar discs.

Most of the angular momentum is transmitted into the residual accretion disc through an unidentified mechanism that is thought to be related to the powerful magnetic fields associated with a newborn star.

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Answer:

built in potential Vbi = +0.5V

barrier height = 0.139 V

doping concentration = 5.39 × 10²³cm³

Explanation: