Rachel has an unknown sample of a radioisotope listed in the table. using a special technique, she is able to measure the mass of just the unknown isotope as 104.8 kg at 12:02:00 p.m. at 4:11:00 p.m. on the same day, the mass of the unknown radioisotope is 13.1 kg. which radioisotope is in the sample? potassium-42 nitrogen-13 barium-139 radon-220

Answer:

1500N

Explanation:

Answer:

balanced forces external forces

Explanation:

A body that is under a network of balanced external forces will experience no resultant force at all, since all the forces cancel themselves out. A body that is moving with this type of force will  experience no acceleration, since there is no force acting on them. This lack of acceleration means that the body maintains a constant velocity if it is already in motion, or zero when the body is at rest.

The three laws dealing with the creation of various spectra are due to Kirchhoff's Laws of Spectroscopy, established by Gustav Kirchhoff in the 19th century. These laws help us understand and classify the different types of spectra: continuous, emission, and absorption spectra.

1. Kirchhoff's First Law states that a hot, dense object, such as a solid, liquid, or high-pressure gas, produces a continuous spectrum. In a continuous spectrum, all wavelengths of light are present without any gaps or breaks. This is due to the thermal motion of particles, causing them to emit light at a range of wavelengths. Examples of continuous spectra include the light emitted by incandescent light bulbs or the sun's visible light.

2. Kirchhoff's Second Law concerns hot, low-density gases, which produce an emission spectrum. In an emission spectrum, only specific wavelengths of light are emitted, creating bright lines on a dark background. These discrete lines correspond to the unique energy levels of the gas's atoms or molecules, as they release energy when electrons transition from higher to lower energy states. Emission spectra can be used to identify elements, as each element has a unique set of emission lines.

3. Kirchhoff's Third Law deals with the absorption spectrum, created when light passes through a cool, low-density gas. This gas absorbs specific wavelengths of light, corresponding to the energy levels of its atoms or molecules. The absorption spectrum appears as a continuous spectrum with dark lines, where the gas has absorbed light. These dark lines are called absorption lines, and their patterns can also be used to identify elements.

In summary, Kirchhoff's Laws of Spectroscopy explain the creation of continuous, emission, and absorption spectra based on the properties of the emitting or absorbing objects. These laws help us analyze and identify elements and molecules in various astronomical and laboratory settings.

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Answer:

every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.

Explanation:

The average translational kinetic energy for a single gas molecule at 811 K is\(3.338 x 10^-21 J/molecule.\)

To calculate the average translational kinetic energy, Ek, for one mole of gas at 811 K, we can use the following formula:
\(Ek = (3/2)RT\)
Where R is the gas constant and T is the temperature in Kelvin. For one mole of gas, we know that there are 6.022 x 10^23 gas molecules. So, substituting the values, we get:
\(Ek = (3/2)(8.314 J/mol*K)(811 K)Ek = 31,536 J/mol\)
Therefore, the average translational kinetic energy, Ek, for one mole of gas at 811 K is 31,536 J/mol.
To calculate the average translational kinetic energy for a single gas molecule at 811 K, we can use the following formula:
\(Ek = (1/2)mv^2\)
Where m is the mass of a gas molecule and v is the velocity of the gas molecule. The average velocity of a gas molecule can be calculated using the root-mean-square velocity formula:
\(v = √(3RT/m)\)
So, substituting the values, we get:
v = √(3(8.314 J/mol*K)(811 K)/(0.028 kg/mol))
v = 492.8 m/s
Now, substituting the values in the formula for Ek, we get:
\(Ek = (1/2)(0.028 kg/mol)(492.8 m/s)^2Ek = 1.364 x 10^-20 J/molecule\)
Therefore, the average translational kinetic energy for a single gas molecule at 811 K is 1.364 x 10^-20 J/molecule.

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The force that results in a material's deformation and subsequent reduction in volume is known as compression stress.

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Answer:

heat and power

Explanation:

is the simultaneous production of electricity and heat both of which are used

Answer:

The given Device is a :

Since at the left corner, The MFL (Magnetic field lines) are entering the solenoid OR terminating at this end, This end turns out to be the SOUTH POLE.

According to the arrows, The current is always in the direction of the magnetic field. So, The current is leaving the Solenoid at the top right corner.

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

Hope this helped!

Answer:

The name of the device is Solenoid. Left end represents South Pole. The current ( I ) is leaving the wire coil at the top right corner.

Explanation:

Hope you understand....

Answer:

Local gravity dominates over the expansion of the universe.

Explanation:

(The expansion of the universe is a relatively weak force acting throughout the universe).

The frictional force experienced on the coin, when it is at a distance of 14 cm is 0.77N and the coefficient of static friction when the coin slides off will be 0.964.

To find the answer, we need to know more about the friction.

                    \(m=140*10^{-3} kg\\w=1 rev/s=2\pi rad/s\\r_1=14*10^{-2}m\\g=9.81m/s^2\\\)

                    \(f=F_c=ma_c=m*r_1w^2\\f=140*10^{-3}*14*10^{-2}*4*\pi ^2=0.77N\)

                              \(f_s=kN,\\\\Where, \\N=mg\\\\k=\frac{f_s}{mg}\)

                         \(F_c=f_s=mrw^2=140*10^{-3}*24*10^{-2}*4\pi ^2\\f_s=1.325N\)

                   \(k=\frac{1.325}{140*10^{-3}*9.81}=0.964\)

Thus, we can conclude that, the frictional force experienced on the coin, when it is at a distance of 14 cm is 0.77N and the coefficient of static friction when the coin slides off will be 0.964.

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Answer:

Diffusion happens in liquids and gases because their particles move randomly from place to place.

Answer:

Frictional force. hope this helps have a good day

Answer:

frictional force

Explanation:

Friction always acts to oppose any relative motion between surfaces. For the simple example of a book resting on a flat table, the frictional force is zero. There is no force trying to move the book across the table, so there is no need for a frictional force because there is nothing for the frictional force to oppose.

The direction of the object acceleration is towards​ North West.

The given parameters:

The net force on the object is calculated as follows;

Vertical axis, = 4 N - 1 N = 3N north

horizontal axis, = 3 - (5 + 1)  = 3N west

The direction of the resultant force is North west

Thus, the direction of the object acceleration is towards​ North West.

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Answer:

The source of energy that is used to power the movement of contraction in working muscles is adenosine triphosphate (ATP) – the body's biochemical way to store and transport energy. However, ATP is not stored to a great extent in cells. So once muscle contraction starts, the making of more ATP must start quickly.

Explanation: Brainliest?

Answer:

(F = ma ) Newton's second law states that force is proportional to what is required for an object of constant mass to change its velocity. This is equal to that object's mass multiplied by its acceleration.

Answer:

value of heat is 18 J

2. step by step

formular w=p(volume1-volume2)

w= 1.0×10^5(0.0006-0.0004)

w= 40 J

Answer:

8100 g

Explanation:

8.1 kg × 1000

= 8100 g

Answer:

8,100 Grams

Explanation:

To change Kilograms to Grams, you multiply the mass value by 1000.

So, 8.1kg x 1000 = 8,100g.

Hope this helps!

Answer:

I think the answer is 8km2

Answer:

Distance = 17km

Displacement = 12.6 km

Explanation:

south 12km

west 4km

north 1km

Total distance = 12 + 4 + 1 = 17km

Total displacement = in picture above.

The concept of "God" means different things to different people, so it's difficult to provide a definitive answer to this question. Some people believe in a specific deity or deities, while others believe in a more abstract or universal concept of divinity. Still others do not believe in any kind of higher power at all. There is no single piece of evidence that can definitively prove or disprove the existence of God, as people's beliefs about God are often based on faith, personal experiences, and philosophical arguments. Ultimately, the question of whether God exists is a matter of personal belief and interpretation.

The potential energy is highest at a point that is at the maximum height with respect to ground.

The formula to find the potential energy near earth's surface is -

U = mgh

Given is to identify the point where potential energy is largest.

The potential energy is highest at a point that is at the maximum height with respect to ground.

Therefore, the potential energy is highest at a point that is at the maximum height with respect to ground.

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This is the answer tab

Firstly, we need to write the formulas for both the gravitational force and electric force. Our gravitational force is:

And the electric force is:

We can see that these forces have almost equal formulas. What we want is Fe/Fg. Before this, we can simplify the forces, as both particles have the same charge and mass. We're left with the following:

And

By dividing both, we get

We have d^2 on the numerator and denominator. We can elimante the distance then, as it is different from zero. We have the following:

We can then replace our values with the constants. k is Coulomb's constant, q is the charge of a proton, G is Newton's constant, and m is the mass of a proton. We finally get

So, the electric force is 1.2386*10^36 times higher than the gravitational. The most interesting about this, is that it doesn't depend on the distance the two of them are apart.

An object has gravitational potential energy due to its an position relative to the gravitational field it is in.

The gravitational potential energy is determined by the mass of the object, the gravitational constant, and the distance between the object and the source of the gravitational field.

Gravitational potential energy is a type of potential energy that an object can have due to its position in a gravitational field. It is the energy that is stored in an object due to its position in a gravitational field and can be converted into other forms of energy.

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Answer:

(i) Please see graph of the motion of the particles created with MS Excel and the calculations in the following sections

(ii) The time of collision is approximately 1.0 seconds

(iii) The common horizontal distance of point collision from the point of projection is approximately 25.2 meters

Explanation:

The velocity with which the first projectile was fired, v₁ = 21 m/s

The angle to the horizontal the particle is launched = 53.1°

The time at which the other particle was launched = 1 second later

The location from which the other particle was projected = 0.3 m below the first particle

The initial velocity of the second particle = 31.5 m/s

The angle to the horizontal at which the second particle was projected, θ = 36.9°

(i) The height reached, by each of the particle is given as follows;

y = u·t - 1/2·g·t²

For the first projectile, we have;

y = 21·(t₁+1)×sin(53.1°) - 9.81·(t₁+1)²/2 + 0.3

For the second projectile, we have;

y= 31.5·(t₁)×sin(36.9°) - 4.905·(t₁)²

If the two projectiles collide, we get;

21·(t₁+1)×sin(53.1°) - 9.81·(t₁+1)²/2 + 0.3  = 31.5·(t₁)×sin(36.9°) - 4.905·(t₁)²

Using a graphing calculator for simplifying, we get;

-11.93·t₁ + 12.2 = 0

t₁ = 12.2/11.93 ≈ 1.02

Therefore, at time t₁ = 1.02 seconds, after the launch of the second particle, the two particle will be at the same vertical height

However, whereby at the time, t₂, the particles collide, the horizontal distance travelled, 'x', will be equal;

We have;

x = u·cos(θ)·t₁

For the first particle, we have;

x₁₁ = 21 × cos (53.1°) × (t₂ + 1)

For the second particle, we have;

x₂₂ = 31.5 × cos (36.9°) × t₂

At the point of collision, we have;

x₁ = x₂

∴ 21 × cos (53.1°) × (t₂ + 1) = 31.5 × cos (36.9°) × t₂

31.5 × cos (36.9°) × t₂ - 21 × cos (53.1°) × t₂ = 21 × cos (53.1°)

t₂ = 21 × cos (53.1°)/(31.5 × cos (36.9°)  - 21 × cos (53.1°) ) = 1.00219236871

t₂ ≈ 1.0 seconds

Given that t₁ ≈ t₂, the particles reach the same height and the same horizontal distance at the same time, t₂ ≈ 1.0 and therefore, they collide.

(ii) The time of collision is found above as t₁ ≈ t₂ ≈ 1.0 seconds

(iii) The horizontal distance of the point of collision from the starting point, 'x', is given as follows;

x = 21 × cos (53.1°) × (1.0 + 1) ≈ 25.2

The horizontal distance of the point of collision from the starting point, x ≈ 25.2 meters

The vertical distance of the point of collision from the starting point of the second particle, 'y', is given as follows;

y = 21 × (1+1)×sin(53.1°) - 9.81 × (1+1)²/2 + 0.3 ≈ 14

The vertical distance of the point of collision from the starting point of the second particle, y ≈ 14 meters

The magnitude of the distance from the starting point of the second particle, r = √(25.2² + 14²) ≈ 28.8

The magnitude of the distance from the starting point of the second particle, r ≈ 28.4 meters.

Answer:

below

Explanation:

1. in front of the mirror

2. convex mirror

3.upright and diminished

4.magnification= image height÷object height

-1.25=i.h÷2

ih=-1.25×2

i.h=-2.5

a) The ratio of the electric charge on each conductor to the potential difference (i.e., voltage) between them is used to express capacitance.

b) The area of the plates, the spacing between them, and the type of insulating material or dielectric between them are the three variables that have an impact on a parallel-plate capacitor's capacitance.

c) The area of each plate, the dielectric material separating the plates, and the distance between the plates all affect the capacitance of a parallel plate capacitor.

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Answer:

they tend to occur during active periods of the solar cycle

Explanation:

The characteristic, shared by sunspots, solar flares, and coronal mass ejections, is they are dark spots on the sun's surface and occur in active solar cycle period.

The sunspots, solar flares, and coronal mass ejections are the type of solar activities. This solar activities are led by the solar magnetic activity.

Lets check all the option.

Hence, the characteristic, shared by sunspots, solar flares, and coronal mass ejections is they appear as dark spots on the sun's surface and  tend to occur during active periods of the solar cycle.

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Answer:

Long question good luck:)

Explanation:

Answer:7

Explanation:

because its the right answer