Nuclear Energy

The element carbon has three natural isotopes: C-12, C-13, and C-14.
Use the periodic table to find the number of protons in a carbon atom.
Then make a drawing to show the nuclei of the three carbon isotopes.
Your drawing should convey the number of protons and neutrons in each of the three different nuclei.
Carbon-12 and Carbon-13 are stable, whereas Carbon-14 is unstable.
Which isotope of carbon is most likely to undergo natural radioactive decay?
Which one would be called a radioisotope?
Explain the three processes of nuclear change and what is produced during as a result of that change.
Why is U-235 the most common nuclear fuel instead of the more abundant U-238? State a clear topic sentence and support it with evidence.
Create a flow chart to show how uranium is processed for use in a nuclear reactor.

The right sphere will acquire an equal and opposite net positive charge to balance the negative charge on the left sphere.

Since the left sphere is attracted to the positively charged rod, it means that the left sphere acquires a temporary negative charge due to induction.

The positive charge on the rod repels electrons in the left sphere, causing them to move away from the rod side and accumulate on the opposite side, resulting in a net negative charge on the left sphere.

According to the principle of charge conservation, the net charge on the system must remain zero. Therefore, the right sphere acquires an equal and opposite net positive charge to balance the negative charge on the left sphere.

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Answer:

A. Metre

Explanation:

it's just goes by metres

Answer:

\(q=4\times 10^{-16}\ C\)

Explanation:

It is given that,

The charge on an object is 2500 e.

We need to find how many coulombs in the object. The charge remains quantized. It says that :

q = ne

\(q=2500\times 1.6\times 10^{-19}\ C\\\\q=4\times 10^{-16}\ C\)

So, the charge on the object is \(4\times 10^{-16}\ C\).

The frequency of swing is inverse of the period of swing.

The simple harmonic motion is defined as the to and fro motion of the object against the fixed point in a cycle. The simple harmonic motion depends upon the frequency and time period of the object.

The frequency definition states that it is the number of complete cycles of waves passing a point in unit time. The time period is the time taken by a complete cycle of the wave to pass a point.

Here, the frequency and the time period of the object is inverse of each other.

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Answer:

b because we apply Hooke's law

Explanation:

Hooke's law

The distance from the wall you would stand and hear no sound at all is 0.83 m.

The speed of a wave is the rate of change of distance traveled by a wave with time.

The distance at which the wave will have zero amplitude, there will be no sound at all since amplitude of a sound is proportional to intensity of the sound.

The point of zero amplitude, L = λ/₂

Where;

λ is wavelength of the wave

The wavelength of the wave is calculated as follows;

λ = V/f

where;

λ = 332/200

λ = 1.66 m

L = 1.66/2

L = 0.83 m

Thus, the distance from the wall you would stand and hear no sound at all is 0.83 m.

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Answer:

The interaction with the highest electrostatic potential energy is:

A +1 and -2 particle separated by a distance of 5 nm.

Explanation:

The electrostatic potential energy between two charged particles depends on the magnitude of their charges and the distance between them. The formula for calculating electrostatic potential energy is:

U = k * (q1 * q2) / d

where U is the electrostatic potential energy, k is Coulomb's constant, q1 and q2 are the magnitudes of the charges, and d is the distance between them.

In the given options, the interaction between +1 and -2 particles separated by a distance of 5 nm has the highest electrostatic potential energy because the charges have a higher magnitude (compared to other options) and they are close to each other, resulting in a stronger electrostatic force of attraction. The other options either have smaller charges, larger distances, or both, leading to lower electrostatic potential energy.

The audience for the 9th grade physics MCAS is students in the 9th grade who are taking the Massachusetts Comprehensive Assessment System (MCAS) physics exam.

The exam is designed to assess students' knowledge and skills in physics, and it is used to make decisions about students' placement in courses, graduation requirements, and eligibility for college and career programs.

The 9th grade physics MCAS is a multiple-choice exam that consists of 50 questions. The questions are based on the Massachusetts Curriculum Framework for Science, which outlines the standards that students are expected to meet in physics.

Students who take the 9th grade physics MCAS must score at least proficient in order to meet the state's graduation requirements. Students who score below proficient may be required to take additional courses or remediation.

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Work done on moving any object for a distance s is given by,

Where F is the force

From the above equation, It is clear that as long as the force acting on the object remains the same, the work done will be the same for the same length

That is for the same value of s, just like in this case, work done will be the same.

In this question, s=1 i.e. displacement is 1 unit when it moves from 1 to 2 or when it moves from 3 to 4.

Hence the answer is true.

In this system, there are two thermal energy transfers that are instances of radiation: A. From the flame to air that isn't in contact with it D. From the hob to a spoon in the area

Thermal energy can be seen in the boiling of water on a stove. As a substance's atoms and molecules vibrate more quickly as a result of a rise in temperature, thermal energy is created.

The most typical method of heat transfer is conduction, which involves the direct exchange of heat between two things. Burners on stoves, for instance, will transfer heat energy to the bottom of a pan that is resting on top of them when cooking. The pan then transfers the heat to its contents.

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Answer:

The sum of all the forces acting on an object in the same direction.

The sum of all forces acting on an object in the same direction is described for the net force acting on an object.

Example : If two forces (2 kids pushing in the same direction to move the object big box) act on an object (big box) in the same direction, then the net force is equal to the sum of the two forces. If the kids pushed in the opposite direction, the net force will not occur.

Hence, Option D is the correct answer.

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Answer:

Explanation:

Displacement of train = 60 - 25 = 35 mile

= 35 x 1.6 = 56 km

duration of time = 45 - 15 = 30 minutes

= 30 x 60 = 1800 s

velocity of train = displacement / time

= 56 / 1800 = .03111 km /s

= 31.111 m / s

Voltage depends on the amount of resistance, current according to the Ohm's law, and, by definition, is the measurement of electrical pressure.

According to the Ohm's Law,  the current through a conductor between two points is directly proportional to the voltage across the two points.

Mathematically,

V ∝ I

V = IR

where, R is the resistance of the conductor and I is the current flowing in the conductor. So, the voltage depends on the amount of resistance and current.

Also, Voltage is the pressure from an electrical circuit's power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light.

Hence All of the above option in the given question are true.

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Explanation:

c because there is element

Answer:

C. H2 and N2 would react to produce more NH3

Explanation:

A.P.E.X

Complete question:

It is measured that 3/4 of a body's volume is submerged in oil of density 800kg/m³. What is the specific gravity of oil?

Answer:

The specific gravity of the oil is 0.8.

Explanation:

Given;

density of the oil, \(\rho_o\) = 800 kg/m³

density of water, \(\rho_w\) = 1000 kg/m³

The specific gravity of any substance is the ratio of the substance density to the density of water.

Specific gravity of the oil = density of the oil / density of water

Specific gravity of the oil = 800/1000

Specific gravity of the oil = 0.8

Therefore, the specific gravity of the oil is 0.8.

Recall that average velocity v is given by

v = ∆x/∆t

where ∆x is displacement and ∆t is time.

Under constant acceleration, average velocity is also equal to the average of the initial and final velocities,

v = (v₂ + v₁)/2

The player starts at rest, so v₁ = 0, and speeds up to v₂ = 5.45 m/s in a matter of ∆t = 3.02 s. So

∆x = (v₂ + v₁) ∆t / 2

∆x = (5.45 m/s) * (3.02 s) / 2

∆x ≈ 8.23 m

Answer:

c

Explanation:

If the balloon sticks to the wall then electrons move from Pam’s hair to the balloon and attract protons in the wall.

One of the ways of producing static electricity is by the use of friction. Friction occurs when two surfaces are rubbed together. This leads to the loss of electrons from one of the surface which attracts the protons on another surface.

If the balloon sticks to the wall then electrons move from Pam’s hair to the balloon and attract protons in the wall.

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Answer:

91.84kg

Explanation:

Answer:

Explanation:

Reverse the second equation, and change the sign of the enthalpy

The flow of the charged particles are described by the electric current.

The electric field, electric potential difference and gravitational force are not to describe the flow of the charged particles.

Hence, option 3 ( electric current ) is the correct answer.

Answer:

2000 N

Explanation:

Final momentum (30 m/s) subtract initial momentum (25 m/s) divided by time (5 seconds). 30-25=5 divided by 5=1. Multiply by weight (2000kg) and you get 2000 N

This happens due to force of magnitude 2000 N.

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. A spring balance can be used to calculate the Force. The Newton is the SI unit of force.

Given parameters:

Mass of the car: m = 2000 kg

Initial speed of the car: u = 25 m/s.

Final speed of the car: v = 30 m/s.

Time interval: t = 5 seconds.

Hence, according to Newton's second law of motion:

Force applied on the car = change in momentum/time interval

= ( final momentum - initial momentum)/ time interval

= (mv - mu )/t

= m(v-u)/t

= 2000 ( 30 - 25) / 5 N

= 2000 N.

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Answer:

Alfred Wegener

Explanation:

Hi there!

Recall that:

Impulse = Δ in momentum = mΔv

Impulse = Force · time

Begin by calculating the change in momentum, or impulse.

I = mΔv = m(vf - vi)

I = (79)(0 - 32) = -2528 Ns

Now, we can use the equation relating force and time to impulse.

I = Ft

Rearrange for time:

I/F = t

-2528/0.25 = -10112 N

**OR, if magnitude ⇒ |-10112| = 10112 N

Because they used cutting-edge tools and technology to strengthen the signal and increase the range, the Swedish Space Agency was able to transmit a wifi signal over such a long area.

With a 2.4GHz frequency, Wi-Fi transmissions typically have a range of over 45 metres, or roughly 150 feet. You will have a reach of approximately 15 metres or 50 feet when using a 5Ghz frequency.

802.11g - Indoor effective ranges of 100–150 feet at 54 Mbps wireless throughput using a 2.4GHz transmission frequency. 802.11g and 802.11b can communicate at 11 Mbps.

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The torque generated by the motor, accelerating with 1.8 m / \(s^{2}\) Of the elevator is, 18372 Nm.

The force which causes the object to rotate about any axis is called torque. In math form, it is equivalent to the product of force and perpendicular distance.

Given: Radius of pulley (r) = 1.2 meters;

Moment of inertia of pulley (I) = 380 kg\(m^{2}\)

Mass of elevator plus passenger (M) = 3100 kg;

Mass of counterweight (W) = 2700 kg;

Now if the rope tension is \(T_{2}\) then

\(T_{2}\)  = 3100 × (9.8 + 1.8)

\(T_{2}\)  = 35960 N

If  \(T_{1\) is the counterweight tension then

 \(T_{1\) = 2700 × (9.8 - 1.8) N

 \(T_{1\) = 21600 N

Now Angular acceleration (α) = a / r

α = 1.8 / 1.2

α = 1.5 rad / sec

If T is the total torque then

\(T = 2*I*\alpha +(T_{2} -T_{1} )*r\)

T = 2 × 380 × 1.5 + (35960 - 21600) ×1.2

T = 18372 Nm

Therefore, the total torque generated is 18372 Nm.

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Answer:

The acceleration of the crate is 7.5 m/s²

Explanation:

Given;

force exerted on the crate, F₁ = 500 N

mass of the crate, m = 40 kg

frictional force between the floor and the crate, F₂ = 200 N

The net horizontal force is given by;

∑Fₓ = F₁ - F₂

∑Fₓ = 500 N - 200 N

∑Fₓ = 300 N

Apply Newton's second law of motion to determine the acceleration of the crate;

∑Fₓ = ma

a = ∑Fₓ / m

a = 300 N / 40 kg

a = 7.5 m/s²

Therefore, the acceleration of the crate is 7.5 m/s²

Answer:

v₀(1 + B²L²t/mR)

Explanation:

We know that the force on the loop is F = BIL where B = magnetic field strength, I = current and L = length of side of loop. Now the current in the loop I = ε/R where ε = induced e.m.f in the loop = BLv₀ where v₀ = velocity of loop and r = resistance of loop

F = BIL = B(BLv₀)L/R = B²L²v₀/R  

Since F = ma where a = acceleration of loop and m = mass of loop

a = F/m = B²L²v₀/mR

Using v = u + at where u = initial velocity of loop = v₀, t = time after t = 0 and v = velocity of loop after time t = 0

Substituting the value of a and u into v, we have

v = v₀ + B²L²v₀t/mR

= v₀(1 + B²L²t/mR)

So the velocity of the loop after time t is v = v₀(1 + B²L²t/mR)

The expression for the loop's velocity as a function of time as it enters the magnetic field is v = v₀(1 + B²L²t/mR).

As we know that

Force on the loop

F = BIL

here

B = magnetic field strength,

I = current

and L = length of side of loop.

Now

the current in the loop I = ε/R

where

ε = induced e.m.f in the loop = BLv₀

where v₀ = velocity of loop

and r = resistance of loop

So,

F = BIL = B(BLv₀)L/R = B²L²v₀/R  

Also, F = ma where a = acceleration of loop and m = mass of loop

Now

a = F/m = B²L²v₀/mR

We have to use

v = u + at

where

u = initial velocity of loop = v₀,

t = time after t = 0

and v = velocity of loop after time t = 0

So, it be like

v = v₀ + B²L²v₀t/mR

= v₀(1 + B²L²t/mR)

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