The idea of "visible" and "invisible" work is related to other hierarchical dichotomies in our culture about work, including "valuable" and "unvalued" work

Answer:

0.1667 m/s

Explanation:

m1V1 + m2V2 = m1V3 + m2V4

0.01 = ( 0.0075) + (0.015 * V4)

V4 = (0.01 - 0.0075) / (0.015)

V4= 0.1667

Answer:

0.167 m/s

Explanation:

When a glass rod is rubbed with a neutral silk cloth, the glass becomes positively charged, and the silk cloth acquires a negative charge.

The process of rubbing the glass rod with the silk cloth causes the transfer of electrons between the two materials. Electrons, which have a negative charge, move from the silk cloth to the glass rod. As a result, the glass rod gains electrons and becomes negatively charged, while the silk cloth loses electrons and becomes positively charged.

The transfer of electrons leads to an imbalance of charges between the two materials, resulting in opposite charges on the glass rod (positive) and the silk cloth (negative). Therefore, the silk cloth acquires a negative charge when the glass rod is rubbed with it.

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Answer:

The bulb consumes electrical energy at the rate of 500 Watts

1 Watt = 1 Joule/sec  where the joule is the unit of energy

Electric energy is often expressed in kw-hrs

This means that 1 kilowatt of power is used for 1 hour

1 kw-hr = 1000 joules/sec * 3600 sec = 3.6E6 joules of energy

Answer:

Astronauts float around in space because there is no gravity in space. Everyone knows that the farther you get from Earth, the less the gravitational force is. Well, astronauts are so far from the Earth that gravity is so small. This is why NASA calls it microgravity.

Explanation:

Current is the drift of electrons, however cutting-edge and electron flow within the opposite direction. cutting-edge flows from fantastic to bad and electron flows from terrible to advantageous. current is determined by way of the number of electrons passing thru a cross-segment of a conductor in a single second.

The drift velocity of the electrons and their modern-day density are at once proportional to each different. also, whilst the electrical field depth will increase, the waft pace increases and the present-day flowing through the conductor also increases.

The rate at which the fees float past a vicinity this is, the quantity of fee in keeping with unit time is referred to as the electrical contemporary. whilst charges go with the flow via a medium, the modern relies upon on the voltage implemented, the material thru which the expenses go with the flow, and the country of the fabric.

An increase in modern is resulting from an increase in glide pace v=μE because of an increase of the carried out electric powered discipline, wherein μ is the mobility of the electrons is the electron mobility of the steel.

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Answer:

0.07

Explanation:

Huge Brain

Coefficient of friction between the car and the ground will be 0.07.    

    Given in the question,

Force applied on the car by which the car is accelerated,

F = ma

  = 3000 × 3

  = 9000 N

Force \(F_k\) to overcome the friction = 11000 - 9000

                                                         = 2000 N

Gravitational force F' on the car = mg

                                                       = 3000(9.8)

                                                       = 29400 N

Since, \(\mu_k=\frac{F_k}{F'}\)

                \(=\frac{2000}{29400}\)

                \(=0.068\)

                ≈ 0.07

   Therefore, coefficient of friction between the car and the ground will be 0.07.    

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When using your high bright headlights, you should change them to low beams a distance of approximately 500 feet before oncoming vehicles.

This distance ensures that you have enough time to adjust your headlights and avoid blinding the drivers in the opposite direction. By switching to low beams, you decrease the intensity of your headlights and reduce the risk of temporarily impairing the vision of other drivers. It is important to be considerate of other road users and maintain proper visibility to ensure a safe driving environment for everyone.

To change your headlights from high to low beams, follow these steps:
1. Locate the headlight controls in your vehicle. This is typically a switch located on the dashboard or on the steering column.
2. Identify the position or symbol that represents the low beam setting. This is usually indicated by a horizontal line or the letters "LOW."
3. When you are approximately 500 feet away from oncoming vehicles, switch the headlights to the low beam setting.
4. Ensure that the low beams are properly functioning by checking that they illuminate the road adequately without blinding other drivers.
5. Remember to switch back to high beams when there are no oncoming vehicles in sight, and it is safe to do so.

Following these steps and being mindful of other drivers will help promote safety on the road when using your high bright headlights.

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Answer:

17.64 j

Explanation:

thats the answer.

The velocity as a function of time is 0, and displacement between t = 10.0 s and t = 35.0 s is 0.

The vector quantity velocity (v), denoted by the equation v = s/t, quantifies displacement (or change in position, s), over change in time (t).

as S= 0, then

\(V_{total}\) = \(\frac{ Final Speed - initial speed}{total_time }\)

V=0.

Displacement is defined as the final position minus the starting position.

Displacement = Final distance- initial distance

S= 0

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Simply how they share electrons distinguishes the various bond kinds. Polar bonds share unevenly, ionic bonds don't share at all, and covalent bonds share equally.

Simple electron sharing patterns distinguish the various bond types.Covalent bonds are created when electrons are shared. Despite the fact that both thermosetting plastics and thermoplastics are polymers, how they react to heat is different. Thermoplastics can melt in the presence of heat after curing, whereas thermoset plastics retain their  and remain solid in the presence of heat. Both their weight and chemical stability are low. excellent thermal insulation and low thermal conductivity. Glass fibers and mineral fillers are typically heavily incorporated into thermoset resins. Polymers called elastomers can be stretched far beyond their original length and can be quickly and compressed to almost their original dimensions.

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Explanation:

Dissolve 2 -naphthol in ethanol in a round bottom flask.

Add sodium hydroxide pellets and boiling chips. Attach a condenser.

Heat under reflux for 20 minutes, until all the base dissolves.

Add 1 -bromobutane and reflux for an additional hour.

Pour the contents fo the round bottom flask into a beaker of ice

Collect the precipitate by vacuum filtration on a Bachner funnel

Rinse the product with cold water and dry it on the filter.

A.) Runway has to be 181.5 long.

B.) Plane takes 11 second for the plane to take off.

Change in velocity (Δv) divided by the change in time (Δt), is called acceleration that can be represented by the equation

a = Δv/Δt.

This lets you measure how fast a  velocity changes in (m/s^2). Acceleration a vector quantity, that is it has both magnitude and direction

Meter per second squared is the SI unit of acceleration.

Given, a small plane must reach a speed of 33m/s for takeoff, starting from rest and constant acceleration is 3.0m/s^2

Let the  time be 't'

hence,

(33-0 )/t = 3

33 = 3t

t = 11 sec

Time taken by the plane to take off is 11sec.

Average velocity = (33 + 0)/t

= 16.5 m/sec

Distance = speed * time

= 16.5 * 11

= 181.5 m

Runway has to be at least 181.15 meters long.

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Answer:

7

Explanation:

Answer:

15 cm

Explanation:

Dari pertanyaan yang diberikan di atas, diperoleh data sebagai berikut:

Gaya 1 (F₁) = 225 N

Jarak terpisah 1 (d) = 5 cm

Gaya 2 (F₂) = 25 N

Jarak terpisah 2 (d₂) =?

Kita dapat memperoleh persamaan yang berkaitan dengan gaya dan jarak muatan dua titik dengan menggunakan rumus berikut:

F = Kq₁q₂ / d²

Perbanyak silang

Fd² = Kq₁q₂

Menjaga Kq₁q₂ konstan, kita memiliki:

F₁d₁² = F₂d₂²

Dengan rumus di atas maka diperoleh jarak sebagai berikut:

Gaya 1 (F₁) = 225 N

Jarak terpisah 1 (d) = 5 cm

Gaya 2 (F₂) = 25 N

Jarak terpisah 2 (d₂) =?

F₁d₁² = F₂d₂²

225 × 5² = 25 × d₂²

225 × 25 = 25 × d₂²

5625 = 25 × d₂²

Bagilah kedua sisinya dengan 25

d₂² = 5625/25

d₂² = 225

Hitung akar kuadrat dari kedua sisi

d₂ = √225

d₂ = 15 cm

Oleh karena itu, muatan dua titik harus berjarak 15 cm untuk memiliki gaya tarik 25 N

Answer:

frequency

Explanation:

I think it's frequency because when frequency of a sound wave increases we feel increase in pitch

Based on the given information, the most appropriate classification for the state of the volcano would be "Active-Dormant."

The volcano's history of generating multiple lava flows over the past 10,000 years indicates that it has been active in the relatively recent past. The presence of lava flows that have spread over large areas suggests ongoing volcanic activity, although not necessarily in the immediate present.

Additionally, the mention of very little tephra (volcanic ash and fragments) indicates that the volcano is not currently experiencing explosive eruptions. Instead, it has been primarily characterized by effusive eruptions that produce lava flows.

The fact that people in the nearby town remember the last eruption, which caused some forest fires, further supports the classification of the volcano as active-dormant. While the volcano may not be actively erupting at the moment, the memory of the recent eruption and the potential for future volcanic activity suggests that it is still in a state of activity, albeit in a relatively dormant phase.

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A 95 kg flat stone is being pushed by Sisyphus up a 30° frictionless slope. To move it up the hill at a steady pace of 22 cm/s, he needs exert 475 N of effort. The kinetic friction coefficient is 0.26.

Therefore Acceleration, 0.26 is likely to be the kinetic friction coefficient.

Here: Mass of stone, m = 95 kg

Speed, v = 22 cm/s

Slope, θ = 30°g = 10 m/s²(a)

The force required to push the stone up the slope at a constant speed can be found using the formula:

Force = Weight x Component of Weight along the slope

F = mgsinθF = 95 x 10 x sin30°F = 475 N

Therefore, the force required to push the stone up the slope at a constant speed is 475 N.

b. Let's say the slope does have considerable friction, and Sisyphus lets the stone freely slide back down the ramp. If the stone has a constant acceleration downward of 2.6 m/s², then the likely coefficient of kinetic friction μ can be found using the formula:

μ = a/gμ = 2.6/10μ = 0.26

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As a result, the system's maximum spring potential energy U is given by: U = (2π^2MD^2)/P^2

Potential energy is the energy stored by an item as a result of its location relative to other objects, internal tensions, electric charge, or other reasons. Potential energy is stored energy that is affected by the relative location of various components in a system. When a spring is squeezed or extended, its potential energy increases. A steel ball has higher potential energy when lifted above ground than when it falls to Earth.

Here,

The maximum spring potential energy U can be calculated using the equation:

U = (1/2)kD^2

where k is the spring constant, which can be found from the period of oscillation using the equation:

k = (4π^2M)/P^2

Substituting the expression for k into the equation for U, we get:

U = (1/2)((4π^2M)/P^2) * D^2

So the maximum spring potential energy U of the system is given by:

U = (2π^2MD^2)/P^2

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Light photons always travel at a constant speed (the speed of light) regardless of their energy, while the velocity of electrons is not constant and can vary with their energy.

Light photons and energetic electrons do not have constant velocities independent of energy. Light photons, which are particles of electromagnetic radiation, travel at a constant speed in a vacuum, which is approximately 299,792 kilometers per second (or about 186,282 miles per second) in a vacuum, denoted as the speed of light (c). This speed is a fundamental constant of nature and remains constant regardless of the energy of the photons. In other words, all photons, regardless of their energy, travel at the same speed in a vacuum.

On the other hand, energetic electrons do not have a constant velocity independent of their energy. According to classical physics, the velocity of an electron can vary depending on its energy. In classical mechanics, the kinetic energy of an object is related to its velocity. However, in the microscopic world of quantum mechanics, the behavior of particles such as electrons is described differently.

In quantum mechanics, the concept of particle velocity becomes less straightforward. Instead of velocity, quantum particles are described by wavefunctions, which represent the probability distribution of finding the particle at a certain location. The wavefunction of an electron evolves over time according to the Schrödinger equation, and it does not directly correspond to a well-defined classical velocity.

However, in certain situations, such as in electron beams or particle accelerators, electrons can be accelerated to high energies. In these cases, the energy of the electrons is related to their speed, but it is not a constant relationship. As the energy of the electrons increases, their speed can also increase, but it is not independent of their energy.

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Answer:

180 because it's half of a full rotation before they shoot the other person.

Answer:

acceleration: 5.48 m/s²

time taken: 9.3 seconds

Given:

\(\boxed{\sf acceleration = \dfrac{Force}{mass}}\)    \(\boxed{\sf time \ taken = \dfrac{final \ velocity - initial \ velocity}{acceleration} }\)

using the formula's:

answer 1:

\(\sf acceleration = \dfrac{F}{m}\)

\(\sf acceleration = \dfrac{6572 }{1200 }\)

\(\sf acceleration = 5.4766... \ m/s^2\)

\(\sf acceleration = 5.48 \ m/s^2\)             // rounded to nearest hundredth //

answer 2:

\(\sf time \ taken = \dfrac{\Delta v}{a}\)

\(\sf time \ taken = \dfrac{66 - 15}{5.48}\)

\(\sf time \ taken = 9.3122 \ seconds\)

\(\sf time \ taken = 9.3 \ seconds\)           // rounded it to nearest tenth //

Answer:

\(\large\boxed{\sf Time =9.30\ s }\)

\(\large\boxed{\sf Accl^n =5.47\ m/s^2 }\)

Explanation:

Here it is given that a car of mass 1200kg has an initial velocity of 15m/s achieves a velocity of 66m/s . A force of 6572N was applied in order to increase the velocity and we need to find the time taken in doing so .

From Newton's Second Law of Motion ,

\(\sf\qquad\longrightarrow Force = \triangle p\\\\ \)

As momentum (p) = mass × velocity ,

\(\\\sf\qquad\longrightarrow Force = \dfrac{m(v-u)}{t} \\\\ \)

Here ,

• On substituting the respective values ,

\(\sf\qquad\longrightarrow 6572N = \dfrac{1200kg ( 66- 15 )m/s }{t}\\\\ \)

\(\sf\qquad\longrightarrow 6572N = 1200kg \times \dfrac{51}{t} \\\\ \)

\(\sf\qquad\longrightarrow t = \dfrac{1200×51}{6572N } \\\\ \)

\(\sf\qquad\longrightarrow t =\dfrac{61200}{6572}s \\\\ \)

\(\sf\qquad\longrightarrow \pink{\frak{ Time = 9.30\ s }} \)

• For finding acceleration ,

\(\sf\qquad\longrightarrow Force = mass * acceleration \\\\ \)

\(\sf\qquad\longrightarrow accl^n =\dfrac{Force}{mass} \\\\ \)

\(\sf\qquad\longrightarrow accl^n =\dfrac{6572N }{1200kg} \\\\ \)

\(\sf\qquad\longrightarrow \pink{\frak{ acceleration= 5.47\ m/s^2}} \\\\ \)

\(\rule{200}4\)

Answer:

Unbalanced force -  

Explanation:

Unbalanced force is expected to cause a body to accelerate.

Answer:

Unbalanced force

Explanation:

Unbalanced force is expected to cause acceleration in any body as it's net value is not zero in every direction .

I hope it's helpful

Answer:

The time of flight is obtained as 25.9 seconds

The time of flight is the time taken to move the object that have been projected along the parabolic path. In this case, we have a cannonball that have been fired  from level ground with a velocity of 240.0 m/s at an angle of 32 degrees.

We know that from the question

T = 2usinθ/g

T = time of flight

u = initial velocity

θ = angle of projection

g = acceleration

T = 2 * 240.0 m/s * sin 32 degrees/9.8 m/s^2

T = 25.9 seconds

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Answer:

A. overweight

Explanation:

Answer:

c

Explanation:

since of his lack of growing his body dont know what to do with the needed fat so while he's still growing its in his tummy waiting

The repulsion force between the two Arkon nuclei when the distance between them is 1x10⁻³μm is approximately 7.4x10⁻¹⁴N. The correct option is d. 7.4x10⁻¹⁴N.

The formula for repulsion force between two Arkon nuclei when the distance between them is given by Coulomb's law. Coulomb's law states that the force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Mathematically, the law can be expressed as F=kq1q2/r²,

Where F is the force, q1 and q2 are the charges, r is the distance between the charges, and k is the Coulomb's constant.The electric charge of one electron is 1.6x10⁻¹⁹C.

Therefore, the charge of the Arkon nucleus with 18 protons = 18(1.6x10⁻¹⁹) C = 2.88x10⁻₈⁸ CThe force between the two Arkon nuclei can be calculated using the formula above.

F=kq1q2/r²

Substituting the values we have;F = (9x10⁹)(2.88x10⁻¹⁸ C)2/(1x10⁻³ m)2F ≈ 7.4x10⁻¹⁴ N. Therefore, the repulsion force between the two Arkon nuclei when the distance between them is 1x10-3μm is approximately 7.4x10⁻¹⁴N. The correct option is d. 7.4x10⁻¹⁴N.

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