How long will it take for a 40.0 gram sample of I 131 half-life 8.040 days to decay to 1 100 its original mass?

The acceleration will be 0.35 m/s^2 if he pulls with the same force when the wagon contains a child weighing 3 times of wagon.

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The wavelength of the second line in the Balmer series is 304 nm and fourth line is 1093.7 nm.

The Balmer series in the hydrogen spectrum has spectral lines that are in the visible spectrum.

The wavelength is determined using the Balmer-Rydberg equation.

Wavelength for any two selected lines from the Balmer series of the spectra of hydrogen,

1 / λ = R (1/ n₁² - 1/ n₂²)

Where,

λ is the wavelength,

R is the Rydberg constant (1.0974 x 10⁷ m⁻¹),

n₁ and n₂ are integers where n₂ > n₁.

First, let us choose n₁ = 2, which is the second energy level and we will calculate the wavelength of the second line.

n₂ = 3λ = R(1/2² - 1/3²)

λ = R (4/36 - 1/9)

λ = R (1/36) = (1.0974 x 10⁷ m⁻¹) / 36

λ = 3.04 x 10⁻⁷ m = 304 nm

The wavelength of the second line in the Balmer series is 304 nm.

Now, we will calculate the wavelength of the fourth line.

n₂ = 5n₁ = 2λ = R (1/2² - 1/5²)

λ = R (4/100 - 1/25)

λ = R (3/100) = (1.0974 x 10⁷ m⁻¹) / 100 x 3

λ = 1.0937 x 10⁻⁷ m = 1093.7 nm

The wavelength of the fourth line in the Balmer series is 1093.7 nm.

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The angle of refraction of the light is 28.88°

Refractive index, also called index of refraction, measure of the bending of a ray of light when passing from one medium into another. If i is the angle of incidence of a ray in vacuum (angle between the incoming ray and the perpendicular to the surface of a medium, called the normal) and r is the angle of refraction (angle between the ray in the medium and the normal), the refractive index n is defined as the ratio of the sine of the angle of incidence to the sine of the angle of refraction; i.e., n = sin i / sin r.

The refractive index of light from air to water is 1.33

Therefore n = sin i / sin r.

1.33= sin40/sinr

sinr= sin40/1.33

sinr= 0.643/1.33

sinr = 0.483

r= sin^-1(0.483)

r= 28.88°

therefore the angle of refraction is 28.88°

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The angle of refraction, given that the light passes from air into water at an angle of 40.0° to the normal, is 29°

Snell's law states as follow:

index of refraction (n) = Sine i / Sine r

n = Sine i / Sine r

Where

With the above formula, we can obtain the angle of refraction as follow:

n = Sine i / Sine r

1.33 = Sine 40 / Sine r

Cross multiply

1.33 × Sine r = Sine 40

Divide both sides by 1.33

Sine r = Sine 40 / 1.33

Sine r = 0.4833

Take the inverse of Sine

r = Sine⁻¹ 0.4833

r = 29°

Thus, the angle of refraction is 29 °

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The full cycle of moon phases averages 29.531 days. A quarter of that is 7.38 days. So "7 days" is a pretty good approximation for casual conversation. It's true.

Answer:True

Explanation:

The full cycle of the moon is 29.631 or we could say 29.5 and the quarter is 7.34 I think so yes it’s true it’s appropriately a full average and if you subtract this two it true

The cross product of A and B is perpendicular to both A and B.

A × B = (4i + 2j + 2k) × (4i - 4j + 8k)

A × B = 16 (i × i) - 16 (i × j) + 32 (i × k) + 8 (j × i) - 8 (j × j) + 16 (j × k) + 8 (k × i) - 8 (k × j) + 16 (k × k)

A × B = -16 (i × j) - 32 (k × i) - 8 (i × j) + 16 (j × k) + 8 (k × i) + 8 (j × k)

A × B = -16k - 32j - 8k + 16i + 8j + 8i

A × B = 24i - 24j - 24k

The magnitude of A × B is

||A × B|| = 24 ||i - j - k|| = 24√3

Dividing A × B by its magnitude gives a unit vector,

(A × B)/||A × B|| = 1/√3 (i - j - k)

Answer:

The density of carbon tetrachloride is 1.59 g/cm^3.

Given the following data:

Mass of flask = 345.8 gVolume of carbon tetrachloride = 225 mLMass of flask and carbon = 703.55 g

To find the density of carbon tetrachloride;

First of all, we would determine the mass of carbon tetrachloride;

Mass of flask and carbon = mass of flask + mass of carbon tetrachloride

703.55 = 345.8 + mass of carbon tetrachloride

Mass of carbon tetrachloride = 703.55 - 345.8

Mass of carbon tetrachloride = 357.75 g

Next, we would solve for the density of carbon tetrachloride by using the formula;

Substituting the values into the formula, we have;

Density = 1.59 g/cm^3

Therefore, the density of carbon tetrachloride is 1.59 g/cm^3.

Answer:

the answer is

D.refraction

Answer:

yea, force is mass x acceleration

Germination is the process of a plant sprouting from a seed. Seed dispersal is the spreading of seeds away from the parent plant to establish new growth elsewhere.

We have to note that if the seeds of the plant are not dispersed that we can not be able to obtain the growth of the plant in new regions

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Missing parts;

Select the statement that best describes the importance of germination and seed dispersal in plant reproduction.

Plants can reproduce when seeds are germinated during seed dispersal.

Both germination and seed dispersal come before plant reproduction.

Germination has no involvement in plant reproduction, but seed dispersal does.

Plants can grow in new places when seeds are dispersed, and germination begins a new life cycle.

Answer:

The angiosperms dominate Earth's surface and vegetation in more environments, particularly terrestrial habitats, than any other group of plants. As a result, angiosperms are the most important ultimate source of food for birds and mammals, including humans.

Explanation:

plz mark brainlest

Answer:

I LOVED that show when I was 10

Explanation:

Answer: I want to learn about Raid Shadow Legends

Explanation: Please Mark Brainliest W!

Air handling systems in buildings are used to control and distribute the airflow throughout the building. Two main types of air handling systems are Constant Air Volume (CAV) and Variable Air Volume (VAV).

A Constant Air Volume (CAV) system maintains a constant airflow rate regardless of the changes in the building's occupancy or temperature. This system uses a constant volume box, also known as a "plenum," to distribute the air throughout the building. The plenum is connected to a central air handling unit that regulates the airflow. The airflow rate is determined by the system's design and does not change with changes in the building's occupancy or temperature. This means that the same amount of air is being circulated throughout the building at all times, regardless of whether the building is occupied or not.

On the other hand, a Variable Air Volume (VAV) system varies the airflow rate based on the changes in the building's occupancy or temperature. This system uses a VAV box, also known as a "terminal unit," to control the airflow. The VAV box is connected to a central air handling unit and is equipped with a damper that can be adjusted to control the airflow rate. The airflow rate is determined by the current occupancy or temperature of the building and can vary depending on the needs of the building. This means that less air is circulated when the building is unoccupied or when the temperature is comfortable, and more air is circulated when the building is occupied or when the temperature is uncomfortable.

In summary, Constant Air Volume (CAV) systems maintain a constant airflow rate regardless of the changes in the building's occupancy or temperature, while Variable Air Volume (VAV) systems vary the airflow rate based on the changes in the building's occupancy or temperature.

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The maximum height achieved by the body is 2.645 meters.

The maximum height achieved by the body when thrown upwards with velocity {v} is -

h{max} = v²/2g

Given is to find the maximum height achieved by the body.

The maximum height achieved by the body is -

h{max} = v²/2g

h{max} = (2.3)²/20

h{max} = (2.3)²/20

h{max} = 2.645 meters

Therefore, the maximum height achieved by the body is 2.645 meters.

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{A diver jumps off the 2.8 m springboard with an initial velocity of 3.2 m/s.

to. Determine the maximum height.}

Answer:

2 repel attracts light water

Answer:

A magnet has two poles.

Like poles repel each other and unlike poles attract

An electromagnet is used to separate large masses of iron scrap.

The strength of the magnetic field of an electromagnet is increased by inserting a core of soft iron.

In a torch we use a dry cell as the source of electricity.

To light a table lamp and to run a refrigerator, we use mains as the source of electricity.

A group of two or more cells is called a battery.

Conductors pass electricity through them.

Under the assumption of a single point charge of +1.0 C located at the origin, the magnitude of the electric field at point P on the positive x-axis at x = 40.0 cm is approximately 56.25 × 10^9 N/C.

To determine the magnitude of the electric field at point P on the positive x-axis, we need additional information such as the configuration of charges or the distribution of the electric field sources.

Without that information, it is not possible to provide a specific value for the electric field magnitude at point P.

However, if we assume a simple scenario where there is a point charge located at the origin (x = 0) and no other charges or sources nearby, we can use Coulomb's law to calculate the electric field magnitude at point P.

Coulomb's law states that the electric field magnitude created by a point charge is given by:

E = k * (Q / r^2)

Where:

- E is the electric field magnitude.

- k is Coulomb's constant, approximately equal to 9 × 10^9 N m²/C².

- Q is the charge of the point charge.

- r is the distance between the point charge and the point where the electric field is being measured.

Let's assume a point charge Q = +1.0 C at the origin (x = 0) and calculate the electric field magnitude at point P, located at x = 40.0 cm (0.40 m):

r = 0.40 m

Q = +1.0 C

k = 9 × 10^9 N m²/C²

Plugging these values into the equation, we have:

E = (9 × 10^9 N m²/C²) * (1.0 C) / (0.40 m)^2

Simplifying further:

E = (9 × 10^9 N m²/C²) * (1.0 C) / (0.16 m²)

E = 56.25 × 10^9 N/C

Therefore, under the assumption of a single point charge of +1.0 C located at the origin, the magnitude of the electric field at point P on the positive x-axis at x = 40.0 cm is approximately 56.25 × 10^9 N/C.

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The correct answer to Brewster’s angle is 48.8 degrees.

What is Brewsters's law?

The Brewster's angle is the angle of incidence at which polarised light travels perfectly through a clear dielectric surface without being refracted. The light that is reflected from the surface when unpolarized light is incident at this angle is therefore perfectly polarised.

This equation's name is Brewster's law, and the angle it specifies is Brewster's angle. For a glass medium in air, Brewster's angle for visible light is around 56° (n2 = 1.5), while it is roughly 53° for an air-water interface (n2 = 1.33)

Brewster's Angle is defined as the inverse tan of n 2 over n 1. The inverse tan of 1.52 divided by 1.33 is thus 48.8 degrees.

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The ranking of given scenarios on the basis of the linear speed of block is: C > E > A = B = D > F

A pulley is a wheel on an axle or shaft designed to assist in the movement and change of direction of a tensioned cable or belt, or in the transmission of power between a shaft and a cable or belt.

Whether belts, cables or chains, all cable pull systems work according to the same principle. For example, the speed of all pulleys in a pulley system can be calculated by taking the ratio of the diameters of each pulley.

Linear speed (v) ∝ R inner/R outer

So, the higher the value of ratio, higher will be the speed.

Let's calculate the R inner/R outer ratios for each case:

A) 0.4/0.8 = 0.5

B) 0.1/0.2 = 0.5

C) 0.5/0.6 = 0.83

D) 0.2/0.4 = 0.5

E) 0.3/0.4 = 0.75

F) 0.2/0.6 = 0.33

The speed in highest in case C, whereas it is lowest in case F.

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The complete question is as follows:

The pulley in (figure 1) represents different pulleys that are attached with outer radius and inner radius indicated in the table. the horizontal rope is pulled to the right at a constant linear speed that is the same in each case, and none of the two separate ropes slips in its contact with the pulley.

A) R outer = 0.8m; R inner = 0.4m

B) R outer = 0.2m; R inner = 0.1m

C) R outer = 0.6m; R inner = 0.5m

D) R outer = 0.4m; R inner = 0.2m

E) R outer = 0.4m; R inner = 0.3m

F) R outer = 0.6m; R inner = 0.2m

Rank these scenarios on the basis of the linear speed of block.

1 kgf/in² is equal to 6.89475729 × 10^-3 GPa. Here kgf/in² is the  Imperial unit of pressure and GPa is the unit of pressure in the International System of Units (SI).

Kilogram-force per square inch (kgf/in²) and gigapascal (GPa) are units of pressure that have a place with various estimation frameworks. Be that as it may, it is feasible to change over between them utilizing a transformation factor.

1 kgf/in² is equivalent to 6.89475729 × \(10^(-3)\)GPa.

In this manner, to change over a tension worth from kgf/in² to GPa, you can duplicate the worth by 6.89475729 × 10^-3. On the other hand, to change over a tension worth from GPa to kgf/in², you can separate the worth by this transformation factor.

For instance, in the event that you have a tension of 100 kgf/in², you can change it over completely to GPa as follows:

100 kgf/in² * 6.89475729 ×\(10^-3\) GPa/kgf/in² = 0.689475729 GPa

Likewise, on the off chance that you have a tension of 2 GPa, you can change it over completely to kgf/in² as follows:

2 GPa/6.89475729 × 10^-3 GPa/kgf/in² = 290077.6509 kgf/in²

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The complete question is:

how much kg force per square in gigapascal?

The electrical conductivity of the wire is 10^7 S/m (Siemens per meter).

To calculate the electrical conductivity, we can use the formula:

Electrical conductivity (σ) = 1 / (Resistance × Cross-sectional area / Length)

Given:

Length (L) = 20 cm = 0.2 m (since 1 cm = 0.01 m)

Cross-sectional area (A) = 2 × 10^(-3) cm^2 = 2 × 10^(-7) m^2

Resistance (R) = 0.2 Ω

Substituting these values into the formula, we get:

Electrical conductivity (σ) = 1 / (0.2 Ω × (2 × 10^(-7) m^2) / 0.2 m)

The unit of resistance cancels out, and we are left with:

σ = 1 / (\(2 \times 10^{(-7) }m^2\) / 0.2 m)

Simplifying further:

σ = 1 / (\(10^{(-7)}\) m)

To divide by a number in scientific notation, we can multiply by its reciprocal. Therefore:

σ =\(1 \times 10^7\) m^(-1)

Hence, the electrical conductivity of the wire is 10^7 S/m (Siemens per meter).

Electrical conductivity is a measure of a material's ability to conduct electric current. In this case, the wire's electrical conductivity is relatively high, indicating that it is a good conductor of electricity.

The value of \(10^7\)S/m suggests that the wire can easily carry current due to the presence of free charge carriers (e.g., electrons) that can move through the wire with minimal resistance.

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The kinetic energy of the satellite when it has been moved and it enters a new circular orbit of radius 2r is K₁/2.

Centripetal force is equal to mass times velocity squared over radius (Fc = mv²/r). Gravity is equal to gravitational constant times the product of masses of two objects over distance squared (Fg = GMm/r²). The centripetal force on the satellite is provided by the gravitational pull by the earth, so Fc = Fg.

Kinetic energy, the energy acquired by a moving object, is equal to one half of a mass times velocity squared (K = mv²/2).

Fc = Fg gives the equation mv²/2 = GMm/2r. As you can see, the kinetic energy K of the satellite is inversely proportional to radius or distance r. Therefore, K decreases by a factor of 2 when r increases by a factor of 2, and K₁/2 = 2r.

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In order to compute the stopping distance of an object, including the friction between each can and the stationary surface, several factors need to be considered:

1. Initial velocity: The object's initial velocity is a crucial factor in determining the stopping distance. The higher the initial velocity, the longer the stopping distance will generally be.

2. Mass of the object: The mass of the object affects the amount of friction that can be generated with the surface. Heavier objects generally have a higher frictional force, which can contribute to a shorter stopping distance.

3. Coefficient of friction: The coefficient of friction between the cans and the stationary surface plays a significant role in determining the frictional force. A higher coefficient of friction results in a stronger resistance to motion and a shorter stopping distance.

4. Surface conditions: The condition of the stationary surface, such as its roughness or smoothness, can affect the frictional force and, subsequently, the stopping distance. Rough surfaces tend to provide more friction and reduce the stopping distance, while smoother surfaces may result in less friction and longer stopping distances.

5. Other external forces: Additional forces acting on the object, such as air resistance or gravitational forces, can also influence the stopping distance. These forces need to be considered in the calculation.

By taking into account these factors and applying the laws of motion, including Newton's laws and the principles of friction, it is possible to calculate the stopping distance of the cans. However, it is important to note that the specific details and values of these factors would be required to perform the calculations accurately.

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Answer:

it increases

Explanation:

equal to opposite force so it would return the amount applied on it

If an object experiences a certain net force that causes a certain acceleration. If the net force on the object is tripled , then the acceleration of the object would become tripled as well assuming the mass of the object is constant.

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.

As given in the problem if an object experiences a certain net force that causes a certain acceleration. If the net force on the object is

tripled,

If a specific net force acting on an item results in a specific acceleration. Assuming the mass of the item remains constant if the net force acting on it is tripled, the acceleration of the object would also be tripled.

Thus, the acceleration of the object would get tripled.

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Answer:

kinetic energy

Explanation:

Electrical energy is a type of kinetic energy caused by moving electric charges. The amount of energy depends on the speed of the charges – the faster they move, the more electrical energy they carry.

Answer: the answer is c

Explanation:

Answer:

Explanation:

I just did the Gizmo and the correct answer is 12 :) Hope this helps!

The total resistance of the circuit for parallel resistors of 41 Ω and 17 Ω is 12Ω. Hence option D is correct.

When two or more resistors are connected between two same points, they are said to be connected in parallel combination(as shown in fig).  The equivalent resistance is the reciprocal and the sum of reciprocals of all resistance connected in parallel combination.

\(\frac{1}{R_{s}} = \frac{1}{R_{1}} + \frac{1}{R_{2} } + \frac{1}{R_{3}} ..........+ \frac{1}{R_{n} }\)  where Rs is the equivalent or total resistance of the circuit.

In parallel combination, same potential difference exists across each resistor. But current through each resistance is different.

When two or more resistors are connected one after other, they are said to be connected in series as shown in figure. in this combination voltage difference across each resistance is different which is given by ohms law. current flowing through each resistance is same.

equivalent resistance for series combination is given by,

R(s) = R₁ + R₂ + R₃...........+R(n).

In this problem given resistance are not seen, Resistor can be with 41 and 17Ω.

Given,

R₁ = 17 Ω

R₂ = 41 Ω

\(R_{s} = ?\)

by parallel combination,

\(\frac{1}{R_{s}} = \frac{1}{R_{1} } + \frac{1}{R_{2} }\)

\(R_{s} = \frac{R_{1} R_{2} }{R_{1} + R_{2} }= \frac{17*41}{17+41} = \frac{697}{58} = 12\)

R = 12 Ω.

Hence option D is correct.

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When a satellite gets closer to the planet's orbits then Option C. The satellite speeds up this is what Kepler's law indicates to us.

This is because of Kepler's second law, which states that "a line joining a planet and As the planet orbits, the Sun also covers the same amounts of space over the same periods of time. Put succinctly. When the satellite nears the planet. It is compelled to accelerate in order to maintain its coverage of a consistent area over a specific duration.

The gravitational force between the satellite and the planet is stronger when they are closer together. This stronger gravitational force pulls the satellite toward the planet, which causes it to speed up.

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The satellite speeds up when it gets closer to the planet it orbits. This phenomenon aligns with the principles established by Kepler's laws of planetary motion. Therefore, the correct option is C.

Kepler's laws describe the motion of planets and satellites in orbit around a central body. Kepler's first law, commonly referred to as the law of ellipses, states that the orbit of a satellite forms an elliptical shape, with the planet located at one of the focal points of the ellipse. The second law, known as the law of equal areas, states that a line connecting the satellite to the planet sweeps out equal areas in equal intervals of time.

The second law implies that as a satellite moves closer to the planet, the line connecting the satellite to the planet becomes shorter. Since the area swept out in equal intervals of time remains the same, the satellite must cover a smaller distance in the same amount of time. Therefore, to maintain this equal area sweep, the satellite must speed up as it gets closer to the planet.

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Answer:

Sample Response: If temperature and surface area increase, then the time it takes for sodium bicarbonate to completely dissolve will decrease, because increasing both factors increases the rate of a chemical reaction.

Explanation:

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Explanation:

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Answer:it’s all of the above for the ck-12

Explanation: