a thermal neutron in a reactor has kinetic energy of about 0.02 ev. calculate the de broglie wavelength of this neutron.

\(\sf{\pink{\underline{\underline{\blue{QUESTION:-}}}}}\)

[A] If both assertion and reason are true and reason is the correct explanation of assertion .

[B] If both assertion and reason are true but reason is not the correct explanation of assertion .

[C] If assertion is true but reason is false

[D] If both assertion and reason are false

\(\sf{\pink{\underline{\underline{\blue{SOLUTION:-}}}}}\)

✍️ The force acting on the body of mass M are [its weight] ‘Mg’

Hence,

\(\rm{\green{Acceleration\:of\:the\:body\:(a)\:=\:\dfrac{Mg\:-\:F}{M}\:}}\)

\(\rm{\implies\:Acceleration\:of\:the\:body\:(a)\:=\:g\:-\:\dfrac{F}{M}\:}\)

⚡ Now, M > m therefore, the body with larger mass will have greater acceleration and it will reach the ground first .

\(\green\bigstar\:\rm{\gray{\overbrace{\underbrace{\purple{\therefore\:[D]\:Both\:Assertion\:and\:Reason\:\atop{are\:incorrect\:.}}}}}}\)

Answer:

-10

Explanation:

The rectangular area is the base bbb times height hhh.

\begin{aligned}\Delta x&= A \\\\ &=(2\,\text s)\left (-5\,\dfrac{\text m}{\text s}\right ) \\\\ &= -10\,\text m\end{aligned}

Δx

​

=A

=(2s)(−5

s

m

​

)

=−10m

​

The possum displaces 10\,\text m10m10, start text, m, end text to the left.

Answer:

The object accelerates downward at 4 m/s² since the tension on the rope is less than weight of the object.

Explanation:

Given;

mass of the object, m = 2 kg

weigh of the object, W = 20 N

tension on the rope, T = 12 N

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

T = F + W

T = ma + W

ma = T - W

\(a = \frac{T-W}{m} \\\\a = \frac{12 - 20}{2} \\\\a = -4 \ m/s^2\) (the negative sign indicates deceleration of the object)

The object accelerates downward at 4 m/s² since the tension on the rope is less than weight of the object.

Answer:

you know the answer i answered it before on a question 0-0

Explanation:

The point at which the Fahrenheit and Celsius scales have the same numerical value is -40°C. The point at which the Fahrenheit and Kelvin scales have the same numerical value is 459.67°F the expansion gap that should be left between the steel railroad rails is 0.0045 m or 4.5 mm.

(a) The point at which the Fahrenheit and Celsius scales have the same numerical value is -40°C. This is because this temperature is equivalent to -40°F.  At this temperature, both scales intersect and meet the same numerical value.
(b) The point at which the Fahrenheit and Kelvin scales have the same numerical value is 459.67°F. At this temperature, both scales intersect and meet the same numerical value.
For the second part of the question:
Given that the original length of the steel railroad rails is 12.5m, the maximum temperature rise is 30℃, and the coefficient of linear expansion (a) is 1.2×10⁻⁵/℃.
Therefore, the expansion ΔL can be calculated as:
ΔL = L×a×ΔT
Where L is the original length of the steel railroad rails, a is the coefficient of linear expansion, and ΔT is the temperature rise.
Substituting the given values, we have:
ΔL = 12.5×1.2×10⁻⁵×30
ΔL = 0.0045 m
Therefore, the expansion gap that should be left between the steel railroad rails is 0.0045 m or 4.5 mm. This gap allows the rails to expand without buckling or bending.

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Option A and C best describes the energy transformation in this system. This electrical energy is then transferred to an insulated storage tank in her garage.

According to the Law of conservation of energy,Energy can not be created nor be destroyed, it can transfer from one to another form.

The total energy is the sum of all the energies present in the system. The potential energy in a system is due to its position in the system.

The following best describes the energy transformation in this system is;

A. The majority of the electrical energy produced in the system is destroyed as it is transferred to the water tank.

C. The majority of the light energy that initially enters the system is lost to the air surrounding the water tank.

Hence, option A and C are correct.

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Answer:

The amount of light energy that enters the system is equal to the amount of heat energy that is produced.

Explanation:

I got it on study island

Most helpful Answer~

There are no options~

Anyway If the ball is of bad quality it will get deflated/ or strike out.

' The must reasonable thing that could happen is that the ball will bounce'

*Smile* :)  

Incomplete question.

Options:

Answer:

When the green rubber ball leaves the person's hand (frame 120)

Explanation:

Remember, we are told to answer based on the green rubber ball, which means we are to take note of the moment when the green rubber ball leaves the person's hand (frame 120).

However, if we decide to set the time at the start of the video or when the green rubber ball reaches the top, we would get inaccurate results.

Based on the data provided, the force that must be applied at the small piston is f = 1500 × 9.81 × 250/A.

Pascal's principle states that the pressure applied to an enclosedfluid is transmitted undiminished tp every portion of the fluid.

Mathematically:

f/a= F/A

where

Therefore:

f = Fa/A

Since the area of the large piston is not given

f = 1500 × 9.81 × 250/A

Therefore, the force that must be applied at the small piston is f = 1500 × 9.81 × 250/A.

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Answer:

0.36 m

Explanation:

The moment of inertial of a wheel can be calculated as

Where r is the radius of the wheel and m is its mass.

Solving the equation for r, we get

So, replacing I by 0.13 kg m2 and m by 0.98 kg, we get

Therefore, the radius of the wheel is 0.36 m

A balloon expands as you blow into it because of the increase in pressure inside the balloon caused by the air you are blowing into it. When you blow air into a balloon, the air molecules inside the balloon are pushed closer together, increasing the pressure inside the balloon. As the pressure inside the balloon increases, the balloon stretches and expands to accommodate the extra air.

The balloon is made of a flexible material, such as rubber or latex, which allows it to stretch and expand as the pressure inside it increases. The balloon's material has elastic properties, which means that it returns to its original shape when the pressure is released.

The process of blowing air into a balloon can be compared to filling a tire with air. As you inflate a tire with a pump, the air molecules inside the tire are pushed closer together, increasing the pressure inside the tire. This causes the tire to expand and become larger, until it reaches the desired pressure.

In summary, a balloon expands as you blow into it because of the increase in pressure inside the balloon caused by the air you are blowing into it. The balloon's material has elastic properties, which allows it to stretch and expand as the pressure inside it increases.

The momentum of object B is higher than that of object A.

A system's mass and velocity are multiplied to produce its linear momentum. It is simple to see how momentum relates to an object's mass and speed. As a result, an object's momentum grows as its mass or speed increases.

Mass times speed equals momentum.

Object A: momentum is equal to 67 kg times 17 m/s, or 1139 kg/m/s.

Object B's momentum is equal to 2 kg times 100 m/s, or 200 kg/m.

Given that momentum is directly inversely proportional to both mass and velocity, object B has more momentum than object A since its lower mass is more than offset by its much higher velocity.

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The basic requirement for a fusion reaction is a combination of high temperature and pressure, along with a sufficient amount of fuel.

In fusion, the aim is to merge light atomic nuclei, typically isotopes of hydrogen, to form a heavier nucleus and release a tremendous amount of energy. Achieving the necessary conditions involves confining the fuel, such as deuterium and tritium, using powerful magnetic fields or intense laser beams.

These confinement methods ensure that the fuel is heated to millions of degrees, creating a plasma state where atomic collisions occur at high velocities. The high temperature and pressure cause the atomic nuclei to overcome their mutual electrostatic repulsion and merge, releasing energy in the form of light and heat.

Properly sustaining and controlling these conditions are key to realizing controlled fusion reactions, which hold immense potential as a clean and virtually limitless energy source.

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These are the four largest moons of Jupiter and are collectively known as the Galilean moons. They were discovered by Galileo Galilei in 1610 and are named after characters from Greek mythology. Europa, Ganymede, Io, and Callisto are all fascinating celestial bodies with unique features and scientific significance

Europa is known for its subsurface ocean that may harbour conditions suitable for life, Ganymede is the largest moon in the solar system, Io is the most volcanically active object in the solar system, and Callisto is heavily cratered and geologically diverse. These moons have been studied extensively by spacecraft missions such as NASA's Galileo and Juno missions, providing valuable insights into the nature of Jupiter's moons and their geological processes. The major moons of Jupiter are Europa, Ganymede, Io, and Callisto. The major moons of Jupiter are Europa, Ganymede, Io and Callisto.

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800 keV OF energy  is given to the electron if it is accelerated through 0.400 m.

The potential difference's expression is

ΔV = -Ed

E is the strength of the electric field between the plates.

d is the distance between the plates.

ΔV = -(2.00 X 10⁶) (0.400)

     = - 8.0 X 10⁵ V

The expression for electric energy is as follows:

U = qΔV

q = electron charge

U = (-1.6 X 10⁻¹⁹) (-8.0 X 10⁵)

   = 1.28 X 10⁻¹³ J (1 keV/(1.6 X 10⁻¹⁶J)) = 800 kev

Therefore, electric energy is 800 keV.

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Answer:

Mass and kinetic energy have a positive relationship, which means that as mass increases, kinetic energy increases, if all other factors are held constant.

In this state, Kinetic energy is equal to half of the product mass and velocity. SI unit is joules. So it's if the mass is doubled then the kinetic energy also gets doubled.

Answer:

2. 1000N to the west

3. unbalanced

No, it is not possible to determine whether the objects are positively or negatively charged based on the observation that they electrostatically repel each other.

This is because the electrostatic force between two charged objects depends not only on their charges but also on the distance between them.

The force of electrostatic repulsion between two like charges (positive-positive or negative-negative) is always repulsive, while the force of electrostatic attraction between two opposite charges (positive-negative) is always attractive.

However, the magnitude and direction of the force depend on the magnitudes and signs of the charges as well as the distance between them.

Therefore, it is possible for two objects with either positive or negative charges to exhibit electrostatic repulsion, depending on the relative magnitudes and signs of their charges and the distance between them.

Additional information, such as the exact distance between the objects or their charges, is needed to determine their charge signs.

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The sled travels 21.5 meters before coming to a stop.

The coefficient of friction measures the amount of friction between two surfaces. Calculating the resistance to motion at the interface of two surfaces of similar or different materials is what a coefficient of friction is. COF (coefficient of friction) is a dimensionless quantity defined as the ratio of friction force to normal force (Eqn (2.1)). Lubricous materials have a coefficient of friction (COF) less than 0.1.

Here,

coefficient of kinetic friction=0.13

u=7.4 m/s

g=9.8 m/s²

a=coefficient of kinetic friction*g

=0.13*9.8

a=-1.274 m/s²

v=0

v²=u²+2as

0=7.4²-2*1.274*s

0=54.76-2.548s

s=54.76/2.548

s=21.5 m

The distance the sled moves before coming to rest is 21.5 m.

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Considering the equivalence between mass and energy given by the expression of Einstein's theory of relativity, the correct answer is the last option: the energy equivalent of an object with a mass of 1.05 kg is 9.45×10¹⁶ J.

The equivalence between mass and energy is given by the expression of Einstein's theory of relativity, where the energy of a body at rest (E) is equal to its mass (m) multiplied by the speed of light (c) squared:

E=m×c²

This indicates that an increase or decrease in energy in a system correspondingly increases or decreases its mass, and an increase or decrease in mass corresponds to an increase or decrease in energy.  

In other words, a change in the amount of energy E, of an object is directly proportional to a change in its mass m.

In this case, you know:

Replacing:

E= 1.05 kg× (3×10⁸ m/s)²

Solving:

E= 9.45×10¹⁶ J

Finally, the correct answer is the last option: the energy equivalent of an object with a mass of 1.05 kg is 9.45×10¹⁶ J.

Learn more:

To calculate the required values, we can use the following formulas:

i. Sampling frequency (Fs) = 1 / τ

ii. Total duration (T) = N * τ

iii. Maximum frequency without aliasing (Fmax) = Fs / 2

Given the values:

N = 1000 samples

τ = 2 ms

Let's calculate each value:

i. Sampling frequency (Fs) = 1 / τ

Fs = 1 / (2 * 10^-3) = 500 Hz

ii. Total duration (T) = N * τ

T = 1000 * (2 * 10^-3) = 2 seconds

iii. Maximum frequency without aliasing (Fmax) = Fs / 2

Fmax = 500 Hz / 2 = 250 Hz

Therefore, the calculated values are:

i. Sampling frequency (Fs) = 500 Hz

ii. Total duration (T) = 2 seconds

iii. Maximum frequency without aliasing (Fmax) = 250 Hz

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The life expectancy of the given stars are:a) 0.2-solar mass, 0.01-solar luminosity red dwarf: 10 trillion yearsb) 3-solar mass, 30-solar luminosity star: 10 million yearsc) 10-solar mass, 1000-solar luminosity star: 10 million years.

The life expectancy of a star is determined by its mass and luminosity. The more massive and luminous the star is, the shorter its life expectancy is. Hence, using this information, we can estimate the life expectancy of the following stars:a) 0.2-solar mass, 0.01-solar luminosity red dwarfRed dwarfs are known to have the longest life expectancies among all types of stars. They can live for trillions of years.

Hence, a 0.2-solar mass, 0.01-solar luminosity red dwarf is expected to have a much longer life expectancy than the Sun. It could live for up to 10 trillion years or more.b) 3-solar mass, 30-solar luminosity starA 3-solar mass, 30-solar luminosity star is much more massive and luminous than the Sun. As a result, it will have a much shorter life expectancy than the Sun.

Based on its mass and luminosity, it is estimated to have a lifetime of around 10 million years.c) 10-solar mass, 1000-solar luminosity starA 10-solar mass, 1000-solar luminosity star is extremely massive and luminous. It will burn through its fuel much faster than the Sun, resulting in a much shorter life expectancy. Based on its mass and luminosity, it is estimated to have a lifetime of only around 10 million years as well.

Therefore, the life expectancy of the given stars are:a) 0.2-solar mass, 0.01-solar luminosity red dwarf: 10 trillion yearsb) 3-solar mass, 30-solar luminosity star: 10 million yearsc) 10-solar mass, 1000-solar luminosity star: 10 million years.

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Sibling relationships are thought to be so important because they often provide a lifelong source of emotional support and social learning.

Siblings are often the longest lasting relationships in a person's life, and they can provide a sense of emotional support throughout one's life. Siblings also play a significant role in social learning, as they provide a natural context for children to learn social skills such as conflict resolution, negotiation, and communication.

Additionally, siblings may share similar experiences and understandings due to their shared upbringing, which can lead to a strong bond. Overall, sibling relationships are thought to be important due to their potential for lifelong support and social learning.

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The object depicted by the graph initially moves at a speed of 25 m/s.

The rate at which the position of an item changes with respect to time is represented by the vector quantity known as velocity. It is calculated by dividing an object's displacement by the time period during which the displacement took place.

Velocity is a phrase used to more simply define the direction and speed of an object's motion. Both the direction and the speed of an object's motion are specified. The International System of Units (SI) uses metres per second (m/s) as the standard unit for measuring velocity.

We must look at the behaviour of the graph before to time 1 second in order to ascertain the initial velocity of the object the graph represents.

From the graph provided,

From the given graph, We can see that from time 0 to time 1 second, the velocity is 25 m/s and stays that way.

As a result, the object's starting velocity is 25 m/s.

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Assuming an inductor is connected to a 180-v ac line and the inductor has an induced voltage of 120 v, there are 60 volts available to push the current through the wire resistance of the coil.

To determine the voltage that pushes the current through the wire resistance of the coil, you'll need to consider the voltage across the inductor and the applied voltage from the AC line. Given that the induced voltage across the inductor is 120 V and the AC line voltage is 180 V, you can calculate the voltage across the wire resistance by using the formula:

Voltage across wire resistance = AC line voltage - Induced voltage across the inductor

Voltage across wire resistance = 180 V - 120 V = 60 V

So, there are 60 volts available to push the current through the wire resistance of the coil.

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Answer:

they don't, if you get hit in the face then the brackets are gonna rub up against the inside of your mouth then you'll bleed

Explanation:

The spacetime Using Lorentz transformation equation coordinates in the moving frame are (1303.93 m, 3.01 s).

Given information:

An event has spacetime coordinates (x,t)=1,300 m,3.0 s in reference frame S.What are the spacetime that moves in the negative x - direction at 0.03c?We know that the coordinates of the same event as observed from two different inertial frames are related by the Lorentz transformation equations.

Using Lorentz transformation equation:(x', t') = (γ(x − vt), γ(t − vx/c²))where γ = 1/√(1−v²/c²) represents the Lorentz factor, x is the position in the stationary frame, t is time in the stationary frame, x' is the position in the moving frame, t' is time in the moving frame, v is the relative velocity between the two frames and c is the speed of light in vacuum.We are given,x = 1,300 mt = 3.0 s, v = −0.03c (since the motion is in the negative x direction)∴ γ = 1/√(1−v²/c²) = 1/√(1−0.03²) = 1/0.997

The spacetime coordinates in the moving frame, (x', t') = (γ(x − vt), γ(t − vx/c²))= [1/0.997 (1300 - (-0.03c)(3.0))] m, [1/0.997 (3.0 - (-0.03c)(1300)/c²)] s= (1303.93 m, 3.01 s) [correct to 2 decimal places]

Therefore, the spacetime coordinates in the moving frame are (1303.93 m, 3.01 s).

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