When an atom gains or loses electrons, it has an electrical charge. It is known as

Explanation:

The WORK required to stop the truck is equal to the initial Kinetic Energy of the truck  ( 1/2 m v^2)

1/2 mv^2   = 1/2 * 2000 * 30^2  = 900 000 J

Distance travelled in 10 seconds is

  d = vot  - 1/2 at^2      where a = 30 m/s / 10 s = 3 m/s^2

     = 30 (10) - 1/2 ( 3)(10^2) = 150 meters

Work = F * d

900 000 = F * 150

   F = 6000 N

The cost of operation for an A.C for 10 hours per day for a month will be 71,100 francs.

Power is the amount of energy transferred or converted per unit time. The unit of power is the watt, equal to one joule per second. Power is a scalar quantity.

Cost of operation for 10 hours a day;

Daily consumption = 3kW x 10 hours

Daily Consumption = 30kW

Since 1kWH = 79 francs;

Daily consumption amount = 30 x 79 francs

Daily consumption amount = 2,370 francs

Therefore, the monthly consumption (using 30days) will be;

2,370 francs x 30 = 71,100 francs

In conclusion, 71,100 francs will be spent in a month (30 days) to run the 3kW rated A.C for 10 hours a day at 1kWH.

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When the current in the wire is decreasing the oppose magnitude of the magnetic flux in the loops is decreasing.

Induced currents in the loops and the forces exerted on them are directed so they oppose this change

Magnetic flux is a size of the entire magnetic subject which passes thru a given region. it's far a useful device for helping describe the outcomes of the magnetic pressure on some thing occupying a given location.

Magnetic flux through a surface is the surface integral of the ordinary element of the magnetic subject B over that floor. it is also denoted Φ or ΦB. The SI unit of magnetic flux is the weber, and the CGS unit is the maxwell.

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Answer:

true it is aslo the reason for flight or flight response and helps release adrenaline

Explanation:

There's more to this question than just "true" or "false".

-- True, high blood pressure is one possible physical response to stress ... but there are several others.

-- True, stress is one possible cause of high blood pressure ... but there are several others.

-- The relationship is not 1 to 1 .

Answer:

a. 4N and 7N

Explanation:

Draw a free body diagram.

Sum of the forces in the x direction:

∑F = ma

T₂ cos 30° − T₁ cos 60° = 0

T₂ cos 30° = T₁ cos 60°

T₂ (½√3) = T₁ (½)

T₁ = T₂ √3

Sum of the forces in the y direction:

∑F = ma

T₂ sin 30° + T₁ sin 60° − mg = 0

T₂ sin 30° + (T₂ √3) sin 60° − mg = 0

½ T₂ + 1.5 T₂ − mg = 0

2 T₂ = mg

T₂ = 4 N

T₁ = 4√3 N

T₁ ≈ 7 N

(a) The work done by the 150 N force is 877.5 Joules.

(b) The coefficient of kinetic friction between the crate and the surface is approximately 0.437.

To answer this problem, we must take into account the work done by the applied force as well as the work done by friction.

(a) The applied force's work may be estimated using the following formula:

Work = Force * Distance * cos(theta)

where the force is 150 N and the distance is 5.85 m. Since the force is applied horizontally and the displacement is also horizontal, the angle theta between them is 0 degrees, and the cosine of 0 degrees is 1.

As a result, the applied force's work is:

Work = 150 N * 5.85 m * cos(0) = 877.5 J

So, the work done by the 150 N force is 877.5 Joules.

(b) Frictional work is equal to the force of friction multiplied by the distance. The work done by friction is identical in amount but opposite in direction to the work done by the applied force since the crate travels at a constant speed.

The frictional work may be estimated using the following formula:

Work = Force of Friction * Distance * cos(theta)

The net force applied on the crate is zero since it is travelling at a constant pace. As a result, the friction force must be equal to the applied force, which is 150 N.

Thus, the work done by friction is:

Work = 150 N * 5.85 m * cos(180) = -877.5 J

Since the work done by friction is negative, it indicates that the direction of the frictional force is opposite to the direction of motion.

The coefficient of kinetic friction may be calculated using the following equation:

Friction Force = Kinetic Friction Coefficient * Normal Force

The normal force equals the crate's weight, which may be computed as:

Normal Force = mass * gravity

where the mass is 35.0 kg and the acceleration due to gravity is approximately 9.8 m/s^2.

Normal Force = 35.0 kg * 9.8 m/s^2 = 343 N

Now, we can rearrange the equation for the force of friction to solve for the coefficient of kinetic friction:

Force of Friction = coefficient of kinetic friction * Normal Force

150 N = coefficient of kinetic friction * 343 N

coefficient of kinetic friction = 150 N / 343 N ≈ 0.437

As a result, the kinetic friction coefficient between the container and the surface is roughly 0.437.

In summary, the work done by the 150 N force is 877.5 Joules, and the coefficient of kinetic friction between the crate and the surface is approximately 0.437.

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An autobiography, like a memoir, is the writer's recounting of his or her life and is written in the first person, making the writer the protagonist of the narrative.

Contemporary/Realistic: In order to accurately portray our environment and society, realistic fiction develops fictional people and circumstances. Growing up and dealing with social and personal issues are the main themes. Characters in this genre are depicted as they learn about both themselves and others.

Historical and contemporary fiction make up realistic fiction's two subgenres. Unlike current fiction, which takes place in the present or recently past, historical fiction takes place at a period that is far enough back in history to be deemed history.

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Answer: the answer is b

Explanation:

edge

The speed of car A after the collision is 0.52 m/s.

In everyday use and kinematics, the speed of object is the amount of change in position over time, or the amount of change in position per unit time. So it's a scalar quantity.

For a bumper car A

Mass (m₁) = 296 kg

Velocity (V₁) = 3.74 m/s,

For a bumper car B

Mass (m₂) = 222 kg

Velocity (V₂) = 1.85 m/s,

To calculate velocity of car A after the collision mathematically:

Vₙ =(m₁-m₂/m₁+m₂)V₁

Vₙ = Final velocity of car A

Vₙ = (296 - 222/296 + 222) × 3.74

Vₙ = 0.52 m/s

Hence, the velocity of car A after the collision

Vₙ = 0.52 m/s

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If an airplane is  is accelerating down a runway at 2.5 m/s². It's velocity changes 2.5 m/s in each second.

Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.

Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.

Hence, the velocity of the airplane changes 2.5 m/s in each second  when it  is accelerating down a runway at 2.5 m/s².

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Answer:

1.85 J/K

Explanation:

The computation of total change in entropy is shown below:-

Change in Entropy = Sum Q ÷ T

= \(\frac{-heat\ entering\ the\ reservoir}{Reservoir\ 1\ Temperature} + \frac{Conduction\ of\ heat}{Reservoir\ 2\ Temperature}\)

\(= \frac{-1760}{563} + \frac{1760}{354}\)

= -3.12 + 4.97

= 1.85 J/K

Therefore for computing the total change in entropy we simply applied the above formula.

As we can see that there is heat entering the reservoir so it will be negative while cold reservoir will be positive else the process would be impossible.

I believe that it would take 30 seconds, as he accelerates at 10 m/s and 10 x 30 = 300

hope this helps! good luck :)

The exponential form is y = 1264 (1/8)ˣ.

Number of copies sold in first month = 1264

Factor by which the number of copies sold to be increased = 1/8

The exponential form can be written as,

y = abˣ

where a is the number of copies sold in first month, b is the factor by which the selling rate increased, x is the number of months and y is the total copies sold at the end of x months.

Therefore,

y = 1264 (1/8)ˣ

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Answer:

Explanation:

When the hammer hits the nail it transfers this energy to the nail in order to move it 1cm (0.01m). A transfer of energy is known as "work done" and work done = force x distance. So, force = work done / distance = 25 / 0.01 = 2500N Answer: Average force = 2500 Newtons.

The speed of light in material B is 1.6625 × 108 m/s.

The refractive index of a material is its optical density relative to that of a vacuum.

Material B has a refractive index of nB, and its speed of light is vB.

The speed of light in material A is given as 1.25 x 108 m/s.

The refractive indices of materials A and B have a ratio of nA/nB = 1.33.

We will use the formula:

nA/nB = vB/vA = nA/nB.

Therefore, nA/nB = vB/1.25 x 108 m/s.

This equation can be rearranged to give the speed of light in material B:

vB = nA/nB × 1.25 x 108 m/s.

Therefore, vB = 1.33 × 1.25 × 108 m/s.

We will perform this calculation:

vB = 1.6625 × 108 m/s.

Therefore, the speed of light in material B is 1.6625 × 108 m/s.

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Answer:

32 degrees Fahrenheit

Snow forms when the atmospheric temperature is at or below freezing  and there is a minimum amount of moisture in the air. If the ground temperature is at or below freezing, the snow will reach the ground.

Explanation:

Answer:weight

Explanation:weight

The magnitude of the initial acceleration of the object is 4.2 m/s².

The tension in the string once the object starts moving is 13.65 N.

The magnitude of the initial acceleration of the object is calculated by applying Newton's second law of motion as follows;

F(net) = ma

m₂g - μm₁g cosθ = a(m₁ + m₂)

where;

(4.75 x 9.8) - (0.535 x 3.25 x 9.8 x cos40) = a(3.25 + 4.75)

33.5 = 8a

a = 33.5/8

a = 4.2 m/s²

The tension in the string once the object starts moving is calculated as;

T = m₁a

T = 3.25 x 4.2

T = 13.65 N

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Explanation:

the ratio between two circles vqjoizxcvu g çm

Using second equation of kinematics

\(\boxed{\sf s=ut+\dfrac{1}{2}at^2}\)

\(\\ \qquad\quad\sf{:}\dashrightarrow s=0(5)+\dfrac{1}{2}(8)(5)^2\)

\(\\ \qquad\quad\sf{:}\dashrightarrow s=4(25)\)

\(\\ \qquad\quad\sf{:}\dashrightarrow s=100m\)

Answer:

displacement is the distance between the starting point and the ending point of an object's journey

Answer:

If two bumper cars collide with a certain force, then they will move away from each other in opposite directions with the same force. This demonstrates Newton's third law, which states that for every action, there is an equal and opposite reaction.

Explanation:

The inverse-square relationship states:

The intensity of the light to an observer from a source is inversely proportional to the square of the distance from the observer to the source. According to this, we can describe this mathematically as follows:

In this sense:

Let:

I1 = Intensity of light in earth

I2 = Intensity of light in mars

d1 = distance from sun to the earth

d2 = distance from sun to mars

If the light on mars is dimmer:

I2besides:

d2>d1

So, we can conclude that the most accurate statement is:

(A) Daylight on Mars is dimmer than daylight on Earth.

The speed of the object v is 16 m/s.

The mass of the object moving on the horizontal surface is m.

The speed of the object is v m/s.

The coefficient of friction, μ = 0.40

The acceleration due to gravity, g = 10 m/s²

So, the initial velocity is v m/s and the final velocity is 0 m/s.

The total distance traveled by the object is 32 meters.

The formula for force is:

F = ma

Now,

ma = - μmg

a = - μg

a = - 0.40 × 10 = - 4 m/s²

The distance, s = 32 meters

Using the equation of motion,

v² = u² + 2as

0 = v² + 2( - 4 )( 32 )

0 = u² - 256

u² = 256

u = √256 = 16 m/s

Hence, the value of the speed v is 16 m/s.

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Answer:

Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.

Explanation:

Answer:

Wavelength

Explanation:

Velocity of a wave is given by

\(v=f\lambda\)

where

\(f\) = Frequency of wave = \(f=\dfrac{v}{\lambda}\)

\(\lambda\) = Wavelength of wave

We have the relation

\(f\propto \dfrac{1}{\lambda}\)

Now, velocity of the wave in a given medium remains constant. So, if the frequency increases the wavelength must decrease in order to keep the velocity of the wave constant. Also if the frequency decreases the the wavelength increases.

Answer:

D

Explanation:

When the segment is shrunk to one-third of its original length, the ratio of the final linear charge density (?f) to the initial linear charge density (?i) is f/?i = 3

This is because the charge is the same, but the length of the segment has decreased to one-third of its original length. Therefore, the charge density has increased by a factor of 3.

The ratio of the electric force on the proton after the segment is shrunk (Ff) to the force before the segment was shrunk (Fi) is also 3. This is because the electric force is directly proportional to the charge density, so if the charge density increases by a factor of 3, the electric force will also increase by a factor of 3.

If the original segment of wire is stretched to 15 times its original length, the charge density will decrease by a factor of 15. To keep the linear charge density unchanged, we need to add 14 times the original charge to the wire. This is because the original charge will be spread out over 15 times the original length, so we need to add 14 times the original charge to make up for the decrease in charge density.

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Waves are an essential part of the physical world, and they play a crucial role in our daily lives. Waves can be broadly categorized into two types: mechanical waves and electromagnetic waves. Mechanical waves require a medium to travel, such as sound waves, while electromagnetic waves do not need a medium and can travel through space, such as light waves. Both types of waves exhibit unique properties, including amplitude, frequency, wavelength, and speed.

Sound waves are mechanical waves that require a medium to travel, such as air or water. These waves are longitudinal, meaning they move in the same direction as the wave. They have properties such as amplitude, which is the magnitude of the wave, and frequency, which is the number of waves that pass through a point in a given amount of time. Sound waves have a wide range of frequencies, from low-frequency waves, such as the sound of a bass guitar, to high-frequency waves, such as a dog whistle.

Electromagnetic waves, on the other hand, do not require a medium to travel and can travel through a vacuum, such as space. These waves are transverse, meaning they move perpendicular to the wave. They also have properties such as frequency and amplitude. Electromagnetic waves have a wide range of frequencies, from radio waves used to transmit music to gamma rays used to treat cancer.

In our daily lives, waves play a significant role. For example, we use radio waves to listen to the radio, watch television, and make phone calls. We use microwaves to heat food quickly, and we use infrared waves to sense heat and motion in security systems. We also use visible light waves to see the world around us, and ultraviolet waves to help our bodies produce vitamin D.

In conclusion, waves are a fundamental aspect of the physical world and play a significant role in our daily lives. Whether it's listening to the radio, using Bluetooth in our cars, or making phone calls, waves are involved in almost everything we do. Understanding the properties of waves, including frequency, amplitude, and wavelength, is crucial in understanding how waves function and how they affect our daily lives.

Explanation:

Kinetic energy  = 1/2 m v^2

      = 1/2 ( 20 kg) * (100 m/s)^2 = 100 000 J

If the reflected wave has the same amplitude and orientation as the incident wave, it is because the wave experienced destructive interference.

option A.

Destructive interference occurs when waves come together so that they completely cancel each other out. When two waves destructively interfere, they must have the same amplitude in opposite directions.

So when a wave reflects off a certain boundary and the reflected wave has the same amplitude and orientation as the incident wave, it is because both waves interfere destructively.

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