n electron is released from rest in a uniform electric field. the electron accelerates vertically upward, traveling 4.50 m in the first 3.00 ms after it is released. (a) what are the magnitude and direction of the electric field?

Answer:

let the voltages of the cell be V and R the equivalent resistance of the circuit.

I1=RV∵ only one cell connected  ;

I2=RV+V=R2V∵ two cells connected in series  ;

I3=RV+RV=R2V∵ two cells connected in parallel ⇒ total current is same as sum of the currents due to each.

Now , 

LHS = 3I3I2=3R2VR2V=3(R24V2) 

RHS = 2I3(I1+I2)=2R2V(RV+R2V)=2R2VR3V=3R2therefore, LHS = RHS   

Answer:

5.5 rad/sec

Explanation:

Answer:

5.47 rad/s

Explanation:

We can solve this problem using the principle of conservation of energy and angular momentum.

First, let's find the initial kinetic energy of the projectile:

K1 = (1/2) * m * v1^2

= (1/2) * 0.2 kg * (50 m/s)^2

= 250 J

where v1 is the initial velocity of the projectile.

Next, let's find the final kinetic energy of the projectile:

K2 = (1/2) * m * v2^2

= (1/2) * 0.2 kg * (-25 m/s)^2

= 67.5 J

where v2 is the final velocity of the projectile after the collision.

The loss of energy in the collision is:

ΔK = K1 - K2

= 187.5 J

This energy is transferred to the blades, causing them to spin. Let's assume that all of this energy is converted to rotational kinetic energy of the turbine.

The final rotational kinetic energy of the turbine is:

K_rot = (1/2) * I * ω^2

where I is the moment of inertia of the turbine and ω is the final rotational velocity of the turbine.

Using the conservation of energy, we can equate the loss of kinetic energy in the collision to the gain in rotational kinetic energy of the turbine:

ΔK = K_rot

187.5 J = (1/2) * 12.5 kg m^2 * ω^2

ω^2 = (2 * 187.5 J) / (12.5 kg m^2)

ω^2 = 30

ω = 5.47 rad/s

Therefore, the rotational velocity of the turbine after the collision is 5.47 rad/s.

The speed of the block when it is 4.80 m from the top of the incline is approximately 2.52 m/s.

We can use kinematic equations to determine the speed of the block at different points along the incline. The acceleration of the block can be determined from the equation: \(a = (vf^2 - vi^2)/2d\), where vf is the final velocity, vi is the initial velocity (0 m/s in this case), and d is the distance traveled. Plugging in the given values, we find that

\(a = (3.80 m/s)^2/2(7.80 m) = 0.97 m/s^2.\)

Next, we can use the equation vf = vi + at to determine the velocity of the block at a given point along the incline. Plugging in

t = \((4.80 m)/(0.97 m/s^2)\) = 4.94 s, we find that

vf = 0 m/s + 0.97 \(m/s^2\) x 4.94 s = 4.80 m/s = 2.52 m/s.

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Answer:

Explanation:

Bigger pushes and pulls cause bigger changes in an object's motion or shape. When objects collide, contact forces transfer energy so as to change the objects' motions. When two objects interact, each one exerts a force on the other, and these forces can transfer energy between them.

Answer:

93km/h

Explanation:

because 31multiplied by 2 Is equal to 2

Answer:

First one after Oxygen is Oxygen. Then Iron(Fe). Then Carbon(C). Then Potassium(K)

The item would have a terminal velocity of 19 m/s.

Using the formula below, you can determine an object's final velocity given its starting velocity, acceleration, and time interval:

Final speed (v) equals the starting speed (u) plus acceleration (a) multiplied by time (t).

We'll enter the values into the formula now:

The starting speed (u) is 4 m/s.

Acceleration (a) equals 3 m/s2

Time (t) equals five seconds.

Final velocity (v) = 4 m/s + 3 m/s2 * 5 s

How to figure out the equation's right-hand side:

(15 m/s) plus (4 m/s) is the final velocity (v).

Simplifying:

Final speed (v) is equal to 19 m/s.

The object's terminal speed would be 19 m/s as a result.

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Answer:

Yes the light travelling gets refracted through the tiny water droplets suspended in the air.

Explanation:

There are 2 types of rainbow which includes - Primary and secondary rainbow.

A primary rainbow is a coloured bow or arc that appears on a “screen” of water drops when light from a bright light source (the Sun or Moon) falls upon them. A thick “screen” of raindrops will produce more vivid colours than a thin curtain of fewer drops.

A secondary rainbow is appears outside of a primary rainbow and develops when light entering a raindrop undergoes two internal reflections instead of just one.

Therefore whatever we see comes from each single water drop due to refraction.

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A.1.2°C

The First Law of Thermodynamics states that heat is a form of energy, and thermodynamic processes are therefore subject to the principle of conservation of energy.

To find internal energy, you have to add the heat added in the system and work done in the system because the work done is not lost but rather it is added in the system.

Step 1

a)let

to add the energy it must have the same measure unit, so let's convert calories into Julies

remember that

b) now, replace in the formula

now, we have the change of internal energy

Step 2

now, let's find the change in temperature

Use the calorimetry formula.

where m is the mass, Q = heat energy, c = specific heat capacity, and ∆T = change in temperature

a)

let

now,

so, the answer is

A.1.2°C

Answer:

The highest surface part of a wave is called the crest, and the lowest part is the trough. The vertical distance between the crest and the trough is the wave height. The horizontal distance between two adjacent crests or troughs is known as the wavelength.

I hope it's helpful!

Answer:

a. 10.2 N b. 1.73 c. 58.8 N d. 10.2 N

Explanation:

a. The force that will make the block slide down the plane

This is the component of the block's weight along the plane F = mgsinθ where m = mass of block = 1.2 kg, g = 9.8 m/s² and θ = angle of incline = 60°.

So, F = mgsinθ = 1.2 kg × 9.8  m/s² × sin60°.= 10.18 N ≅ 10.2 N

b. The coefficient of friction

The coefficient of friction, μ = tanθ = tan60° = 1.73

c. The normal reaction.

This is equal to the vertical component of the block's weight. So, F = mgcosθ. Substituting the values for the variables from above, we have

F = mgcosθ = 1.2 kg × 9.8  m/s² × cos60°.= 58.8 N

d. The frictional force

Since the block does not slide, there is no net force on it. If f is the frictional force, then

F - f = ma. Since a = acceleration = 0,

F - f = 0

f = F = mgsinθ = 1.2 kg × 9.8  m/s² × sin60°.= 10.18 N ≅ 10.2 N

Answer:

7.5 m/s^2

Explanation:

I hope my answer helps u.

The increasing use of mobile devices, such as smartphones and tablets with cellular and Wi-Fi connectivity, has led investigators to explore them for valuable information in investigations.

Mobile devices, particularly smartphones and tablets, have become ubiquitous and store vast amounts of information. Recognizing their potential as a source of evidence, investigators now frequently examine these devices to uncover valuable leads. In the given scenario, the investigator has encountered graphics that are believed to be significant to the case.

The investigator aims to determine various details associated with these graphics, including the equipment used to capture them, the locations depicted, and the timestamps. By thoroughly analyzing the files provided, the investigator will gather the necessary information to compile a formal report documenting the findings of the analysis.

In the formal report, it is crucial to include proper citations and adhere to the APA (American Psychological Association) style for referencing within the body of the report. APA style provides a standardized format for citing sources, ensuring accuracy and credibility in the report's supporting evidence.

By following the APA guidelines, the investigator can provide clear and concise sourcing information, making it easy for readers to locate and verify the referenced sources.

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If the score is 8-3, it is impossible to determine from which side of the court the server should serve without additional information about the current game's score and which side the server served from in the previous point.

The score in a game does not determine which side of the court a player should serve from in tennis.

Instead, the server's position on the court depends on the number of points they have won in the current game and which side of the court they served from in the previous point.

In tennis, players switch sides of the court after every odd-numbered game (i.e., after the first, third, fifth games, etc.). In each game, the server serves from one side of the court for the first point, and then from the opposite side for the second point. The server then alternates sides every two points until the end of the game.

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The common angular speed is 0.11rad/sec

What is  Angular Speed ?

The rate of change of angular displacement is referred to as angular speed. The speed of an object in rotation is known as its angular speed. In radians, the distance traveled is denoted by the symbol. The amount of time is expressed in seconds. The angular speed is therefore expressed in radians per second, or rad/s.

The orbital angular velocity of any of the three vectors (same for all) with respect to its own center of rotation is the definition of the spin angular velocity of a frame, which is consistent with the broader definition.

d = 279m

t = 1.9 h 6840sec

v = d/t

v = 279/6840

v = 0.04m/s

Also, to find angular speed:

v = rw

w = v/r

r = \(\sqrt{x} (r1^2 +r2^2)\\\)/ 2

r = 35.8mm = 0.358m

w = 0.04/0.358

w = 0.11 rad/s

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Answer:

\(\huge\boxed{\sf P = 1.4\ W}\)

Explanation:

Time = t = 50 sec

Force = F = 10 N

Height = 7 m

Power = P = ?

\(\displaystyle P =\frac{W}{t}\)

We know that,

Here, distance is covered in the form of height.

So,

Work = Force × Height

Work = 10 × 7

W = 70 Joules

Now,

P = W/t

P = 70 / 50

\(\rule[225]{225}{2}\)

Answer:

built in potential Vbi = +0.5V

barrier height = 0.139 V

doping concentration = 5.39 × 10²³cm³

Explanation:

It is important to note that the debate between scientific realism and antirealism is ongoing and complex, with various nuances and perspectives within each position. Different philosophers of science and scientists may hold different views on the nature of scientific terms and their relationship to reality.

According to a scientific realist perspective, scientific terms for unobservable phenomena such as "atom" and "black hole" are seen as referring to entities that truly exist in reality. Scientific realists believe that scientific theories and concepts accurately capture aspects of the world, including unobservable entities and phenomena. They argue that scientific theories provide the best explanation of the natural world and aim to describe the underlying structure and mechanisms of reality.

On the other hand, scientific antirealists hold a different view. They argue that scientific terms that refer to unobservable phenomena do not necessarily correspond to something that exists independently in reality. Antirealists often emphasize the instrumentalist view of science, which suggests that scientific theories are simply tools or frameworks that help us organize and predict observable phenomena, without making claims about the ultimate nature of reality.

Antirealists may argue that scientific theories are subject to revision and change over time as new evidence emerges, suggesting that the terms used to describe unobservable phenomena are not fixed and may not have a one-to-one correspondence with actual entities in reality. They may also highlight the role of social and cultural factors in shaping scientific knowledge, suggesting that scientific terms are influenced by human conventions and interpretations.

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Given the total energy in the wire, current and time elapsed, the potential difference is 50 Volts.

The electric power is expressed as P = VI.

Where V is the potential difference, I is the electric current and P is the electric power.

Also, the consumption of energy per unit of time is called power. It is expressed as P = E / t

Given that;

First, we determine the power.

P = E / t

P = 500J / 5s

Power = 100W

Next, we determine the potential difference.

P = V × I

V = P / I

V = 100W / 2.00A

V = 50V

Given the total energy in the wire, current and time elapsed, the potential difference is 50 Volts.

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The Potential difference is 50 Volts.

The potential difference is a measure of the energy given to the charge carriers in a circuit

We know that  the electric power is expressed as P = VI.

V is the potential difference

I is the electric current
P is the electric power.

Also we know that power is expressed as P = E / t

Given

Current( I) = 2.00A ,time t = 5s

Total energy E = 500J

To find the power

P = E / t  = 500J / 5s = 100W

Now , To find the potential difference.

P = V × I (By rearranging it)

V = P / I

V = 100W / 2.00A = 50 V

Therefore , the total energy in the wire, current and time elapsed, the potential difference is 50 V.

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Answer:

Explanation:

This is a 2D problem (parabolic) so we have to think that way. We have to split up the problem into its 2 dimensions to solve it. Think "y-stuff" and "x-stuff".

In the y-stuff category:

v₀ = 0 (initial upwards velocity is 0 since we are told the penny is thrown horizontally)

Δx = -10.0 m (this displacement is negative because the penny lands 10.0 m below the point from which it was thrown)

a = -9.8 m/s/s

t = ? (we need to find the time in this dimension so we can use it in the x dimension to find the displacement, our unknown)

In the "x-stuff" category:

v₀ = 7.25 m/s (this is given)

Δx = ???

a = 0 (acceleration in this dimension is ALWAYS 0)

t = (we will solve for this in the y-dimension and plug it in here).

In the y dimension:

Δx = v₀t + \(\frac{1}{2}at^2\) and plugging in from the y-dimension info:

\(-10.0=0t+\frac{1}{2}(-9.8)t^2\) which simplifies to

\(-10.0=-4.9t^2\) so

\(t=\sqrt{\frac{-10.0}{-4.9} }\) which, to 2 significant digits is

t = 1.4 seconds

Now we will do the same in the x-dimension, using t = 1.4:

Δx = v₀t + \(\frac{1}{2}at^2\) and filling in the x-stuff:

Δx = \(7.25(1.4)+\frac{1}{2}(0)(1.4)^2\) Notice that the stuff after the + sign goes to 0 cuz of the multiplication of 0, so what we are left with is another form of the d = rt equation:

Δx = 7.25(1.4) + 0 so

Δx = 1.0 × 10¹ m (That's rounded correctly to 2 sig dig's: 10 m from the base of the building).

Answer:

30.2

Explanation:

Answer:

The fulcrum of the metre stick is at the 40 cm mark

100 g * 10 cm = 1000 g-cm clockwise torque

x * 30 cm = 1000 gm-cm = counterclockwise torque for balance

X = 1000 / (40 -10) = 1000 / 30 = 33.3 gm  at 10 cm to balance

The longest wavelength are gamma rays.

Radio waves 20 cm

Infrared waves

0.3 mm - 20 cm

Infrared waves

800 nm - 0.3 mm

400 to 800 nm of visible light

X-rays 3 pm–300 pm, ultraviolet radiation 300 pm–400 nm

Gamma rays 3 pm.

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Answer:

Effort = 540 Newton

Explanation:

Given the following data;

Load arm = 60 cm

Effort arm = 40 cm

Load = 360 N

Conversion:

100 cm = 1 meters

40 cm = 40/100 = 0.4 meters

60 cm = 60/100 = 0.6 meters

To calculate the effort that Reha should apply to lift Neha, we would use the expression;

Effort * effort arm = load * load arm

Substituting into the expression, we have;

Effort * 0.4 = 360 * 0.6

Effort * 0.4 = 216

Effort = 216/0.4

Effort = 540 Newton

Answer:A heavy box has a mass of 30 kg. The box experiences a net force of 90 N when pushed along the floor. Use

this information to answer questions 17 and 18

Explanation:

17. What is the acceleration of the box?

a. 3 m/s 2 b. 2 m/s 2 c. 0.3 m/s 2 d. 0.5 m/s 2

18. If the mass of the box was changed to one third as much, and the force was held constant, how would

the acceleration change?

a. It would be one third as much

b. It would be 3 times as much

c. It would be one half as much

d. It would be 2 times as much

Answer:

I am afriad I don't think we can answer this one as it is asking you about your enviroment.

Explanation:

Answer:

1. 960

2. 16.6666

3. 0.41666666666

4. 10

Explanation:

A*V=W

A*120=50

V=I*R

R being resistance

(I'm not a 100% sure on 2 & 3)

The wavelength of the incident light which shines from a monochromatic source is 612 nm.

Wavelength is nothing but the distance between two consecutive waves. It is measured in metres.

Given that, the distance between the screen and the slit = 5 m

Slit width d = 0.180 mm

Width of the fringe β = 1.7 cm = 0.017 m

Wavelength λ = ?

The relation between β, d, x and wavelength is β = (x* λ)/d

Making wavelength λ as subject, we have,

λ = (β* d)/x = (0.017* 0.180* 10⁻³)/5 = 6.12* 10⁻⁷ = 617 nm

Thus, the wavelength of the incident light is 612 nm.

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