Tritium has a half-life of 12.33 years. What fraction of the nuclei in a tritium sample will remain (a) after 5.00 yr?

Answer:

A. The magnets used to lift metal or cars in a salvage/junk yard

Explanation:

An electromagnet  is defined as a type of magnet which are made up of wires in coil shape. Magnetic field in these wires are produced by electric current.

An example of an electromagnet is magnets used to lift metal or cars in a salvage/junk yard because a crane is used in junkyard to lift metal in which crane is attached to a iron disc and when electricity is off, the disc move downwards and placed near required metal and switch on the electricity when disc reaches on metal or cars to be lifted. This electricity generates magnetism in the iron disc and attract metal or cars from the junkyard.

Hence, the correct answer is "A. The magnets used to lift metal or cars in a salvage/junk yard".

Answer:

it may be because of the movement of the atoms. i believe that the heat of the warm water makes it move faster, thus making the object float due to upthrust, or air pressure

The figure's sled dog drags sleds a and b across the snow. The sleds' coefficient of friction with the snow is 0.09. The total amount of force needed to move the sleds is 158.92 N.

Assuming that the sled dog is pulling sleds A and B with a combined mass of 180 kg (100 kg + 80 kg)

Calculate the force of friction between the sleds and the snow:

frictional force = coefficient of friction x normal force

The normal force is equal to the weight of the sleds, which is given by:

normal force = mass x gravitational acceleration

where gravitational acceleration is approximately 9.81 m/s².

For sled A:

normal force A = mass A x gravitational acceleration = 100 kg x 9.81 m/s² = 981 N

frictional force A = coefficient of friction x normal force A = 0.09 x 981 N = 88.29 N

For sled B:

normal force B = mass B x gravitational acceleration = 80 kg x 9.81 m/s²= 784.8 N

frictional force B = coefficient of friction x normal force B = 0.09 x 784.8 N = 70.63 N

Calculate the total force required to move the sleds:

total force = force of friction + force from the sled dog

we can use Newton's second law of motion (F = ma) to determine the force required to move the sleds at a constant velocity:

total force = (mass A + mass B) x acceleration

Since the sleds are moving at a constant velocity, the acceleration is zero. Therefore, the total force required to move the sleds is:

total force = (mass A + mass B) x acceleration = 0

Thus, the total force required to move the sleds is:

total force = force of friction A + force of friction B = 88.29 N + 70.63 N = 158.92 N

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In a Young's double-slit experiment that uses electrons, the angle that locates the first-order bright fringes can be determined using the principles of wave interference. The bright fringes occur when constructive interference happens between the electron waves diffracted by the two slits.

The angle that locates the first-order bright fringes can be calculated using the following equation:

\(\sin(\theta) = \frac{m \cdot \lambda}{d}\)

where θ is the angle, m is the order of the fringe (in this case, first order), λ is the wavelength of the electrons, and d is the separation between the two slits.

Since electrons have a de Broglie wavelength given by \(\lambda = \frac{h}{p}\), where h is Planck's constant and p is the momentum of the electron, we can substitute this expression into the equation. The momentum of an electron can be determined using the equation p = mv, where m is the mass of the electron and v is its velocity.

Therefore, the angle that locates the first-order bright fringes in a Young's double-slit experiment using electrons depends on the wavelength, mass, and velocity of the electrons, as well as the separation between the slits.

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Answer:

the resistance of the copper wire 20 meters long and with a diameter of 0.05 cm is 0.342 ohms.

Explanation:

To calculate the resistance of the copper wire, we need to use the formula:

R = (ρ * L) / A

where R is the resistance of the wire, ρ is the resistivity of copper, L is the length of the wire, and A is the cross-sectional area of the wire.

The resistivity of copper is 1.68 × 10^-8 Ω·m.

First, we need to calculate the cross-sectional area of the wire:

A = π * (d/2)^2

A = π * (0.05cm/2)^2

A = 0.0019635 cm^2

Note that we converted the diameter from centimeters to meters, since the resistivity is given in ohms per meter.

Now, we can calculate the resistance of the wire:

R = (ρ * L) / A

R = (1.68 × 10^-8 Ω·m * 20m) / 0.0019635 cm^2

R = 0.342 Ω

Therefore, the resistance of the copper wire 20 meters long and with a diameter of 0.05 cm is 0.342 ohms.

6P₀V₀ is the work done by the gas during process 1→3→6.

The work performed by a gas expanding against an external pressure is negative, analogous to the work performed by a system on its surroundings. In contrast, when a gas is compressed externally, V₀ and the work is positive because the environment exerts force on the system.

The gas must release some energy into the environment when it expands in response to an external pressure. The overall energy of the gas is thus reduced as a result of the negative work. When a gas is compressed, energy is transferred to it, increasing its energy as a result of positive work.

Let's consider,

Work done = -W (As the energy is released)

External pressure = P₀

Volume of gas = V₀

So, the work done can be calculated as follows:

W = P x (dV)

-W = P₀ × V₀

Now according to the process given:

1→3→6

Energy flow increases up to 6.

Hence, the energy of the system (work done) is:

-W = 6 × P₀ × V₀

-W = 6P₀V₀

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Answer:

Newton believed that mass tells gravity how much force to exert. Einstein believed that mass tells space-time how to curve.

Explanation:

Isaac Newton believed that bodies on earth had a force of gravity pulling them down as a result of their masses.

Albert Einstein believed that the bodies were not pulled down but were moving around in a circular sphere/manner.

This confirms Newton believing that mass tells gravity how much force to exert and Einstein believing that mass tells space-time how to curve.

Answer:

first one is for the assignment second is for the quiz

Explanation:

Assignment - C.

Quiz - D.

Force of gravity = mg = 8.35 * 9.8 = 81.83 N

normal force (N) = 81.83 N

force of friction =   30.69 N

Applied force = 119.2 N

net force = 88.51 N

given

mass = 8.35 kg

acceleration = 10.6 \(m/s^{2}\)

coefficient of friction (mu) = 0.375

force of gravity = mg = 8.35 * 9.8 = 81.83 N

normal force (N) = 81.83 N ( as mg = N )

force of friction = mu * normal = 0.375 * 81.83 = 30.69 N

F net = 0

applied force - force of friction = mass * acceleration

F - fr = ma

F = ma + fr

  = 8.35 * 10.6 + 30.69

  = 119.2 N

net force = F - fr = ma = 8.35 *  10.6

               = 88.51 N

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The attraction between two objects at a distance is the Gravitational force.

An attraction force that exists between all mass-bearing objects is the gravitational force. A massed object draws another massed object; The force's magnitude is inversely proportional to the square of the distance between the two objects and directly proportional to their masses.

Mathematically it can be written as

F = G × m₁m₂/d²

m₁ and m₂ are the masses of the objects in kilograms, and d is the distance between them in meters. G is the universal gravitational constant, which means that it is the same everywhere in the universe.

And G = 6.67 x 10⁻¹¹ N m² / kg²

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(Complete question)

What is the attraction between two objects at a distance?

The are usually aligned with the motion of the Sun.

option C.

Many ancient ruins are aligned with astronomical phenomena and the motion of celestial bodies. This indicates that ancient cultures had a strong interest in and understanding of astronomy and its connection to the natural world.

For example, the ancient Egyptian pyramids at Giza are aligned with the cardinal directions and certain stars, such as the star Sirius. The Mayan city of Chichen Itza in Mexico has a famous pyramid known as El Castillo, which has specific alignments with the sun during the equinoxes and solstices. Stonehenge in England is another famous example, with the stones aligned to the movements of the sun, moon, and stars.

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The true direction of the jet is approximately 4.8 degrees north of east.

To determine the true direction of the jet, we need to calculate the resultant velocity vector. We can start by representing the velocity of the jet and the wind as vectors using the i and j components.
The velocity vector of the jet is 475i (since it is heading due east) and the velocity vector of the wind is 40j (since it is blowing due north).
To find the resultant vector, we can add these two vectors using vector addition.
Resultant velocity vector = 475i + 40j
To find the direction of this vector, we need to use trigonometry. We can calculate the angle that this vector makes with the east using the arctangent function.
Angle = arctan(40/475)
Angle ≈ 4.8 degrees north of east

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Answer:

4 miles per hour

Explanation:

Your welcome

A 1200 kg safe is 1.5 m above a heavy-duty spring when the rope holding the safe breaks. The safe hits the spring and compresses it 48 cm. What is the spring constant.

The spring constant can be calculated using the following formula:

k = F / Δxwhere,

F = force applied

Δx = displacement

k = spring constant

So, We need to calculate the spring constant. To do that, we need to find the force applied as well.

Using conservation of energy, the potential energy stored by the mass is equal to the work done by the spring.

This can be written as mgh = ½kx²

where,m = 1200 kgg = 9.8 m/s²h = 1.5 mx = 0.48 kmm = 1200 kg

Therefore,1200*9.8*1.5 = (1/2) * k * 0.48²

Simplifying the above equation, we getk = 2*1200*9.8*1.5 / 0.48²k = 21470 N/mThe spring constant is 21470 N/m.

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The average induced emf in this coil is 3.52 volts.

When a coil is kept inside a changing magnetic field, an emf/voltage is produced inside it which is given by the following formula:

EMF = NBA/t

Here N is the number of turns in the coil

B is the magnetic field in which the coil is kept

A is the area of the coil

T is the time during which the magnetic field reverses its direction

Putting the given values in the above equation,

E = 120 x 0.20 x 0.050/0.34

E = 3.52 volts

Thus, the average induced emf in this coil is 3.52 volts.

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Answer:

The first and third one

Explanation:

The roughness of the surfaces is very important when determining friction as well as the force pressed on a surfaces as it helps increase friction.

HOPE IT HELPED

The pendulum on the moon is 16.5 cm long and has the same period as an earthly pendulum that is 1.00 m long.

The pace at which speed changes is known as acceleration. Acceleration typically, but not always, indicates a change in speed. Because the direction of an object's velocity is shifting even while it follows a circular course, it continues to accelerate.

In physics, acceleration is the rate at which an object's velocity changes over time. According to Newton's Second Law, an object's acceleration is the end outcome of all forces acting on it. The meter per second squared is the unit of acceleration used in the SI system.

The formula for the period of a pendulum is,

T = 2π * √(l / g)

where, T = period, l = length, and g = acceleration due to gravity.

Substitute values,

T = 2π * √(l / 1.62) = 2π * √(1 / 9.8) = 2π * √(1 / 9.8) * √(1.00 / l)

Solving for l, we get:

l = (1.00 * 1.62) / 9.8 = 0.165 m = 16.5 cm

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In a px orbital, the subscript x denotes the axis along which the orbital is aligned of the electron.

'What is atomic orbital?'

The area closest to an atomic nucleus where an electron is most likely to be found is called an atomic orbital. An atom's orbitals can be classified as either s, p, d, or f orbitals. The Px, Py, and Pz orbitals are three of the p orbitals that exist.

The Px, Py, and Pz orbitals all have two lobes, but the Py orbital has two lobes directed along the y-axis, and the Pz orbital has two lobes oriented along the z-axis. This is the main distinction between the three orbitals. Because of how they are oriented in space, the Px Py and Pz orbitals differ from one another.

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Answer: at least 10 feet away

Explanation:

The ground envisions a dog standing still before rushing suddenly. the dog's accelerating force.

Because they are subjected to a greater force of gravity, heavier items fall from the sky faster than lighter ones. As a result, they accelerate to higher speeds until the force of air resistance equals the force of gravity.

When an object's speed, direction of motion, or both change, it accelerates. While sometimes appearing to be virtually instantaneous, changes in an object's speed are always ongoing (for example a golf ball when hit by a golf club, or car collisions).

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The celestial objects in increasing order of orbital period are: Mercury - Venus - Earth - Mars - Asteroid Belt - Jupiter - Saturn - Uranus - Neptune - Kuiper Belt.

The orbital period refers to the time taken by a celestial object to complete one orbit around another object. Based on the given options, we can arrange them in increasing order of their orbital periods.

Mercury has the shortest orbital period among the listed objects, as it orbits the Sun closest to it. Venus comes next, followed by Earth and then Mars. The Asteroid Belt consists of numerous asteroids that have a wide range of orbital periods, so it is placed after Mars.

Moving to the outer planets, Jupiter has a longer orbital period than the Asteroid Belt. After Jupiter, we have Saturn, Uranus, and Neptune, with each having a progressively longer orbital period.

Finally, the Kuiper Belt, which is a region beyond Neptune, contains a vast number of icy objects and has the longest orbital period among the listed options.

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For a given amount of energy utilized to create the signal, a microwave transmission can transmit the most data.

In order to provide high speed wireless connections that can send and receive audio, video, and data information, microwave is a line-of-sight wireless communication technique.

Highly directional antennas are used for line-of-sight propagation channels in terrestrial microwave transmission employing frequencies in the 4- to 12-GHz range. Depending on their spacing, the antennas' diameters can range from 12 inches to several feet and are often parabolic.

A series of microwave radio antennas make up this microwave link. They are found atop towers at various microwave locations. A communication system called a microwave link uses radio signals as a bridge to convey data between two or more fixed locations. A microwave network is composed of several microwave links.

Mobile cell towers and mobile phones communicate with one another via radio waves and microwaves, respectively. Because they can penetrate the atmosphere, microwaves are used. This signal can be transmitted to a satellite and used for global communication (more than one satellite is required for this).

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Answer:

 t = 6.6 10⁻⁸ m

Explanation:

In this case we have that the reflection in the film is constructive, we take into account that

* When the light is reflected from the air (n = 1) to the film (n=2) it has a phase change of 180º

* within the film the wavelength is modulated by the index of refact

          λₙ = λ₀ / n

taking into account these two aspects the expression for constructive interference is

         2n t = (m + ½)  λ₀

let's find the minimum thickness (t) of the film

         t = (m + ½)  λ₀ / 2n

for m = 0

        t = ½   527 10⁻⁹ /(2 2.00)

        t = 6.6 10⁻⁸ m

Answer:

1, 2, 3, 4

Explanation:

Just did it on Edge

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Answer:

1234 is correct

Explanation:

Answer:

4000N left

Explanation:

6000N-1000N-1000N

6000N-2000N

8000N

The statement that the earth is accelerating since the direction of its velocity is changing is true, as changes in direction are also changes in velocity, which constitutes acceleration

The statement that the earth is going too fast to accelerate any more is false. This is because acceleration is a change in velocity, which can occur even if the speed is constant.

The statement that the earth is not accelerating since we earthlings do not feel the acceleration is also false, as acceleration is a physical property of an object's motion, independent of perception.

The statement that the earth is not accelerating since its speed is constant is true, as acceleration is defined as a change in velocity, which includes changes in speed or direction.

The statement that the earth has a velocity that is always changing is also true, as its motion around the sun is not perfectly circular and is affected by other celestial bodies.

The statement that the earth cannot accelerate since it is in space is false, as acceleration is a property of motion regardless of the medium in which it occurs.

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The highest-order maximum for 405-nm light falling on double slits separated by 27.0 µm is m = 66.

Given:

Wavelength of light (λ) = 405 nm = 405 × 10^(-9) m

Slit separation (d) = 27.0 µm = 27 × 10^(-6) m

To find the highest-order maximum for a double-slit interference pattern, the formula is:

m × λ = d × sin(θ)

Where:

m is the order of the maximum

λ is the wavelength of the light

d is the slit separation

θ is the angle of the maximum

To find the highest-order maximum, it is required to find the largest value of m that satisfies the equation. In this case, it can be assumed that the angle θ is small.

m × λ = d × θ

θ = (m × λ) / d

Now we substitute the given values into the equation:

θ = ((m × 405 × 10⁻⁹ m) / (27 × 10⁻⁶ m)

θ = (m × 405 × 10⁻⁹) / (27 × 10⁻⁶))

θ = (m × 15) / 1000

To find the highest-order maximum, it is required to find the largest value of m that still keeps θ within a reasonable range. Since the angle θ is small, it can be considered θ to be at its maximum when θ is less than 1 radian (approximately 57 degrees).

Setting θ < 1 radian:

(m × 15) / 1000 < 1

m × 15 < 1000

m < 1000 / 15

m < 66.67

The highest-order maximum is the largest whole number value of m that satisfies the inequality. Therefore, the highest-order maximum for 405-nm light falling on double slits separated by 27.0 µm is m = 66.

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The power generated or output power of the turbine is determined as 42.96 W.

The power generated or output power of the turbine is calculated as follows;

eff = 0utput power/1nput power x 100%

13 = 0utput power/(0.62 x 533)

0.13 = 0utput power/330.46

0utput power = 0.13 x 330.46

0utput power = 42.96 W

Thus, the power generated or output power of the turbine is determined as 42.96 W.

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Air within the soil is usually rich in carbon dioxide (C). This is because soil respiration. The correct answer is C) carbon dioxide.

Air within the soil is usually not highly saturated and is not rich in oxygen (A), argon (D), or aluminum (B). This is because these gases are not commonly produced or present in soil systems.

Instead, the air within the soil is often rich in carbon dioxide (C) due to soil respiration. Soil respiration is the process by which microorganisms in the soil break down organic matter and release carbon dioxide as a byproduct. This process is a common occurrence in soils and is necessary for the decomposition of organic matter and nutrient cycling.

The concentration of oxygen in soil air is typically lower than that in the atmosphere due to several factors. First, the movement of air into and out of soil is limited, which restricts the diffusion of oxygen into the soil. Second, the oxygen that is present in soil air is often consumed by microorganisms during respiration or by other chemical reactions that occur in the soil.

Argon is an inert gas that is present in the atmosphere, but it is not produced in soils and does not play a significant role in soil processes. Similarly, aluminum is not a gas and is not present in significant quantities in soil air.

Therefore, the correct answer  is C) carbon dioxide.

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Answer:

B. The larger force causes more acceleration than the smaller.

Explanation:

For example, let me use a child and a grown up. The child represents the smaller force while the grown up represents the larger force. If they are pushing the same object of different sides, obviously the side with the grown up will push and move to the side of the child because it is stronger.