The electron gun in a television tube uses a uniform electric field to accelerate electrons from rest to 4.5×107m/s in a distance of 1.2 cm.
What is the electric field strength?

a. Just Noticeable Difference (JND) refers to the smallest difference in stimuli that can be detected by a person. It is also known as the difference threshold. Weber's Law states that the JND is proportional to the magnitude of the stimulus.

In simpler terms, the JND is relative to the initial stimulus. For example, if you have a 10 kg weight and you add 1 kg, you will notice the difference. However, if you have a 100 kg weight and you add 1 kg, you may not notice the difference. Weber's Law helps us understand how our perception changes as the magnitude of the stimulus changes.

b. To suggest a discount using the principle of JND, we need to consider the income range and the prices of the pressure cooker. Let's assume the JND for families earning Rs. 10,000 per month is Rs. 200 and for families earning Rs. 15,000 per month is Rs. 300. Based on these values, we can calculate the discounts that would make them notice and be motivated to buy the pressure cooker.

For families earning Rs. 10,000 per month, the JND is Rs. 200. So, if we offer a discount of Rs. 200 on the 3 Litre pressure cooker priced at Rs. 1800, the new price would be Rs. 1600. This discount would be noticeable to them and may motivate them to purchase.

For families earning Rs. 15,000 per month, the JND is Rs. 300. So, if we offer a discount of Rs. 300 on the 5 Litre pressure cooker priced at Rs. 2400, the new price would be Rs. 2100. This discount would be noticeable to them and may encourage them to buy.

The justification for these discounts is that they are based on the JND principle, which ensures that the discounts are noticeable to the target audience. By offering discounts within their perception range, we can attract their attention and motivate them to make a purchase.

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The types of baryonic matter are most abundant in the universe are hydrogen and helium

Baryonic matter is the kind of matter that constitutes an ordinary matter, which is everything around us, these are the building blocks that form atoms. Some of the types of baryonic matter that are most abundant in the universe are hydrogen and helium. Hydrogenhis is the most abundant element in the universe, it makes up about 74% of the elemental mass, with most of the rest being helium. Hydrogen gas can be found in most galaxies, usually in the form of molecular hydrogen gas or in atomic form.

Helium is the second most abundant element in the universe, it is formed through nuclear fusion in the hearts of stars and also in supernova explosions, the vast majority of helium is in stars rather than in the interstellar medium. Carbon is the fourth most abundant element in the universe, after hydrogen, helium, and oxygen. Carbon atoms are produced inside stars through fusion of helium and other elements, they are also found in molecules in the form of carbon monoxide (CO) and carbon dioxide (CO2). So therefore the most abundant types of baryonic matter in the universe are Hydrogen and Helium.

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Answer:

a. X: Slower in gases than liquids Y: Faster in solids than gases Z: Velocity depends on medium.

Explanation:

Speed of sound is fastest in solids. Sound waves travel more quickly in solid, than of liquid and gases. Sound waves travel most slowest in gases. Speed of sound varies significantly and it depends upon medium it is travelling through.  In more rigid medium sounds velocity will be faster.

Answer:

1) t ≈ 14.985 seconds

2) The maximum height reached ≈ 1101.4 meters

3) The velocity with which it hits the ground = 147 m/s

4) The total time in the air ≈ 29.969 seconds  

Explanation:

1) The given information are;

The initial velocity of the mortar shell = 147 m/s

The direction of the mortar shell = Vertically upwards

Therefore, we have, from the equation of motion

v = u - g·t

Where;

v = The final velocity = 0 at maximum height

u = The initial velocity = 147 m/s

g = The acceleration due to gravity = 9.81 m/s²

Therefore, we have;

0 = 147 - 9.81 × t

9.81 × t = 147

t = 147/9.81 ≈ 14.985 seconds

t ≈ 14.985 seconds

2) From the equation of motion, v² = u² - 2×g×s

Where;

s = The maximum height reached

We have;

0² = 147² - 2×9.81×s

2×9.81×s = 147²

s = 147²/(2×9.81) ≈ 1101.4 meters

The maximum height reached ≈ 1101.4 meters

3) The velocity with which it hits the ground is equal to the initial velocity = 147 m/s

4) The total time in the air = 2 × The time it takes to reach maximum height

The total time in the air = 2 × 14.985 ≈ 29.969 seconds

The total time in the air ≈ 29.969 seconds

Explanation:

Given

Mass (m) = 1200 kg

Acceleration (a) = 3 m/s²

Force (F) = ?

We know

F = m * a

= 1200 * 3

= 3600 Newton.

Therefore the force acting on the car is 3600 Newton.

Hope it will help):)

Answer:

3

Explanation:

Answer is what its supposed to be. lol.

Stick with it brother. You GOT THIS!!! 100%

b.

Since the force is perpendicular to the displacement of the ball, the total work done by the force is 50 Nm.

Given the following data:

To find the total work done by the force:

The work done by an object is the product of the perpendicular force acting on the object and the distance it covers.

Mathematically, work done is given by the formula:

\(Work\;done = Force\) × \(distance\)

Substituting the given parameters into the formula, we have;

\(Work\;done = 10\) × \(5\)

Work done = 50 Nm.

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The scientific concept that the student most likely used to arrive at his conclusion is Newton's laws of motion.

Newton's Laws of motion - Newton's Laws of motion consists of 3 important Laws. The three laws of motion help us understand how objects behave when standing still, when moving and when forces act upon them.

according to Newton's 2nd laws:

F = ma (where m is mass and a is acceleration of the object)

the subject applied same force on both the balls, but the ball 2 travelled greater distance.

F = M1a1

M1 = F/a1

and M2 = F/a2

and S = 1/2at2 if initial velocity is 0.

so, S is directly proportional to a

so, M1 = F/S1

and M2 = F/S2

Since, S2 is greater than S1, so M2 is less than M1 because distance is inversely proportional to mass of the object.

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Answer:5.45X10^3m

Explanation:So use the formula,v= fλ

3X10^8=5.5X10^4λ what Im saying is divide both and u should get 5454.54m but do sig figs to get answer

Answer:

5.45X10^3m

Explanation:

Answer:

A. respiration.

Explanation:

Cellular respiration can be defined as a series of metabolic reactions that typically occur in cells so as to produce energy in the form of adenosine triphosphate (ATP). During cellular respiration, high energy intermediates are created that can then be oxidized to make adenosine triphosphate (ATP). Therefore, the intermediary products are produced at the glycolysis and citric acid cycle stage.

Additionally, mitochondria provides all the energy required in the cell by transforming energy forms through series of chemical reactions; breaking down of glucose into Adenosine Triphosphate (ATP) used for providing energy for cellular activities in the body of living organisms.

Basically, oxygen goes into the body of a living organism such as plants, humans and animals when they breathe while glucose is absorbed by the body when they eat.

Hence, the conversion of sugar to energy in the presence of oxygen is respiration.

Answer: C

Explanation:

Newton's Third Law of motion states that any action causes an equal and opposite reaction. This is the fundamental requirement for the conservation of classical momentum.

The force, in Newton's, on the player's bat is 18, 436 newtons. The correct option is C.

The word "force" has a specific meaning in science. At this level, calling a force a push or a pull is entirely appropriate. A force is not something an object "has in it" or that it "contains." One thing experiences a force from another. There are both living things and non-living objects in the concept of a force.

Although modest, the gravitational force has a relatively wide field of effect. Maturity is always appealing. Since mass is its source, it operates between any two particles of matter in the universe.

Every action results in a corresponding and opposing response, according to Newton's Third Law of Motion. The basic prerequisite for the conservation of classical momentum is this.

Therefore, the correct option is C. 18, 436 newtons.

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Answer:

0.00005m

Explanation:

To convert from micrometers to meters, divide your figure by 1000000 .

:)

If you add 2 miles from west then 2 miles east then it would 4 miles all together.

Answer:

C.

Explanation:

Answer:

C

Explanation:

The earths rotation on its axis

La respuesta correcta para esta pregunta abierta es la siguiente.

A pesar de que no anexas opciones o incisos para responder, podemos comentar lo siguiente.

La importancia de las capacidades físico-motriz que se desarrollan en el futbol de salón son determinantes para desarrollar o maximizar las actividades propias de este deporte con objeto de rendir al máximo y aspirar al mejor de los resultados.

Estas capacidades físico-motrices son las que le permiten a un jugador realizar su máximo esfuerzo, mejorar su desempeño físico y conseguir resultados positivos.

Estamos hablando de la fuerza, la velocidad y la resistencia.

La velocidad es la aceleración que el jugador de futbol necesita para aumentar su velocidad de un punto A, a un punto B, en el menor tiempo posible.

La resistencia es la capacidad del jugador de futbol para mantener ese nivel de aceleración y desempeño, sin bajar su rendimiento. Su capacidad física debe ser resistente para ser constante en su rendimiento físico.

La fuerza es la potencia con la que desempeña los movimiento físicos dentro de la cancha.

Answer:

5 m/s^2

Explanation:

Acceleration is change in velocity  /  change in time

   Accel = 25 m/s  /  5 s = 5 m/s^2

The bicycle will experience more force.

Force is the intensity by which an object is pushed or pulled.

Let the mass of the pedestrian = M kg

Let the mass of bicycle = m kg

Also M > m

The more the mass the more will be the force exerted on the opposite object.

Therefore the bicycle will experience more force when both of them collided in the street.

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Answer:

for resistors in series, add the resistances to get their equivalence. The answer is

80.0 Ohms

The difference between the majority viewpoint and the minority view is that the majority group is made to feel normal and the minority group is made to feel divergent.

A vantage point or point of view from which something is viewed or assessed is known as the viewpoint The story is narrated from a variety of perspectives, including two major ones and several smaller ones.

Most studies comparing majority versus minority influence argue the author, places a premium on influence in the sense of prevailing. In this context.

There is evidence that majorities have greater public influence than minorities, and that minority impact when it happens, is mostly latent. In the current version,

Hence the difference between the majority viewpoint and the minority view is that the majority group is made to feel normal and the minority group is made to feel divergent.

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    Answer:  D        

Explanation:

Simplified for you.

Answer:F. all are equally likely

Explanation:

F. because there is no way to tell if or what the persentage of tails to heads could be.

The experiment's control consisted of the four treatments. The wild kind of mouse

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The half-life of 40K is approximately 1.3 billion years. Given a ratio of 40Ar/40K as 3/1 in a granite sample, we can estimate the age of the sample by understanding the decay process.  Based on the given 40Ar/40K ratio, the age of the sample is approximately 650 million years.

Since the half-life of 40K is 1.3 billion years, this means that after each half-life, half of the 40K atoms will have decayed into 40Ar. Therefore, if the ratio of 40Ar/40K is 3/1, it suggests that three-quarters (or 75%) of the original 40K atoms have decayed into 40Ar.

To determine the age, we can calculate the number of half-lives that have occurred based on the remaining 25% of 40K. Since each half-life is 1.3 billion years, dividing the remaining 25% by 50% (half) gives us 0.5. Thus, the sample has undergone 0.5 half-lives.

Multiplying 0.5 by the half-life of 1.3 billion years gives us an estimated age of 0.65 billion years, or 650 million years, for the granite sample.

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Charles's law can be calculated by the mathematical formula V1/T1 = V2/T2.

Charles's Law is one of the fundamental gas laws that describe the relationship between temperature and volume of a gas. This law states that the volume of a given amount of gas at constant pressure is directly proportional to the absolute temperature of that gas.

The mathematical formula for Charles's Law is expressed as follows:

V1/T1 = V2/T2

where V1 and T1 represent the initial volume and temperature of a gas, respectively, and V2 and T2 represent the final volume and temperature of the gas, respectively.

To use Charles's Law, you need to know the initial and final volumes and temperatures of a gas. By plugging these values into the formula, you can calculate the new volume of the gas after the temperature changes.

For example, suppose you have a gas that initially occupies a volume of 2 liters at a temperature of 25 degrees Celsius (298 K). If the temperature is increased to 50 degrees Celsius (323 K), you can calculate the new volume using Charles's Law as follows:

V1/T1 = V2/T2

2/298 = V2/323

Solving for V2, we get:

V2 = (2 x 323) / 298 = 2.17 L

Therefore, the new volume of the gas at 50 degrees Celsius is 2.17 liters.

In summary, Charles's Law provides a mathematical relationship between temperature and volume for a given amount of gas at constant pressure. To calculate the new volume of a gas after a change in temperature, you need to know the initial and final volumes and temperatures and apply the formula V1/T1 = V2/T2.

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Answer:

8.45m/s = recoil speed

Explanation:

Momentum = mass • velocity

9.8kg • 88.03m/s = 102.1kg • recoil speed

862.694kg•m/s = 102.1kg • recoil speed

divide both sides by 102.1kg

8.45m/s = recoil speed

The magnitude of the emf induced between the two sides of the shark's head is 43 μV.

To calculate the magnitude of the emf induced between the two sides of the scalloped hammerhead shark's head, you can use Faraday's law of electromagnetic induction. The formula is:

emf = B × L × v

where emf is the induced electromotive force, B is the magnetic field strength (52 μT or 52 x 10⁻⁶ T), L is the width of the shark's head (83 cm or 0.83 m), and v is the shark's steady speed (1.0 m/s).

Plugging in the values:

emf = (52 x 10⁻⁶ T) × (0.83 m) × (1.0 m/s)

emf ≈ 4.3 × 10⁻⁵ V

The magnitude of the emf induced between the two sides of the shark's head is approximately 4.3 × 10⁻⁵ V, or 43 μV, when expressed using two significant figures.

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Answer:

a

Explanation:

Explanation:

Using Cosine rule, we have 5² = 3² + 4² - 2(3)(4)(cosx).

=> cosx = 0, x = 90°.

A 710 kg k g car drives at a constant speed of 23 m/s and is subject to a drag force of 500 N. The required power to drive the car on the ground is 11.5 kW

Power is defined as the amount of work done per unit time.

P = W/Δt

Where:

W = work done

Δt = time period

Since W = F . s  

Hence,

P = F . s/Δt = F . v

Where:

F = force acted on the object

s = distance

v = velocity

Parameters given in the problem:

F = 500 N

v = 23 m/s

Hence, the required power is:

P = (500) (23 ) = 11,500 Watt = 11.5 kW

Your question is incomplete, but most probably your question was:

A 710kg car drives at a constant speed of 23m/s . It is subject to a drag force of 500 N. What power is required from the car's engine to drive the car on level ground?

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