When lead nitrate and potassium iodine are mixed, lead iodine and potassium nitrate form. What are the reactants and products in this checimal reaction?


IF ANSWERED CORRECTLY WILL BE MARKED AS BRAINLY.

Answer:

Momentum=mass*velocity

velocity=distance/time+direction

Answer:

2nd and 4th statements.

Explanation

If voltage is constant ( k ) and I = V / R,

Then I is inversely proportional to R so if I increases R decreases and vice versa, according to that the second statement is correct not the first.

if current is constant, then v is directly proportional to R and vice versa..the 3rd statement is wrong

if resistance is constant v is directly proportional to I, then only the 4th is correct not the 5th

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.

The question relies on conservation of energy

2 Energy equations:

Kinetic Energy = 1/2mv^2

Gravitational potential energy = mgh

Initial energy = final energy

1/2m(v0)^2 = mgh + 1/2m(vf)^2

Divide mass out to save time

1/2(v0)^2 = gh + 1/2(vf)^2

PLug in what we know:

v0 = 39 m/s

h = 21 meters

1/2(39)^2 = 9.8(21) + 1/2(vf)^2

1/2(39)^2 - 9.8(21) = 1/2(vf)^2

554.7 = 1/2(vf)^2

1109.4 = (vf)^2

vf = 33.3076 m/s

The wavefunction is ψ(n1,n2) = (2/l)^(1/2)sin(n1πx/l)sin(n2πy/l) and energy is E(n1,n2) = (h^2/8ml^2)(n1^2+n2^2). Ground state energy is E(1,1) and first excited state is E(1,2) or E(2,1), which are degenerate.


(a) For a particle in a 2-dimensional box, the wavefunction can be written as a product of 1-dimensional solutions, resulting in ψ(n1,n2) = (2/l)^(1/2)sin(n1πx/l)sin(n2πy/l), where n1 and n2 are quantum numbers. The energy for this system is E(n1,n2) = (h^2/8ml^2)(n1^2+n2^2), where h is the Planck's constant.

(b) The ground state has the lowest energy, which corresponds to n1=1 and n2=1. The first excited state corresponds to the next lowest energy values: either n1=1 and n2=2 or n1=2 and n2=1. These two configurations have the same energy, indicating that the first excited state is degenerate.

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A spinning magnetic field is generated by the stator in a DC motor, which causes the armature to rotate.

What takes place when a magnet rotates?

You use kinetic energy to move a magnet when you rotate it. Through the use of electromagnetism's characteristics, this kinetic energy can be transformed into electrical energy.

A current is induced in one direction as one side of the coil ascends through the magnetic field. The direction of the induced current changes as the rotation continues and that side of the coil descends. This indicates that the generator generates an ever-changing current. Alternating current, often known as a.c.

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Compact fluorescent light usually has a B. Longer life compared to an incandescent bulb producing the same number of lumens.

CFLs are designed to be more energy-efficient than incandescent bulbs. They use less energy to produce the same amount of light, which makes them more efficient. This efficiency leads to a longer lifespan for the CFL compared to incandescent bulbs. In general, a CFL can last up to 10 times longer than an incandescent bulb.

To summarize:
- A compact fluorescent light (CFL) has a longer life compared to an incandescent bulb producing the same number of lumens.
- This is due to the higher energy efficiency of CFLs, which allows them to use less energy and have a longer lifespan.

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Answer:

Known variously as the Newcomb–Benford law, the law of anomalous numbers, or the first-digit law, Benford's Law is the observation that the first digit in many real-world collections of numerical data will be tiny, as shown by the example of the first-digit law.

Explanation:

Hope it helps:)

The force of gravity between two magnets is really considerably smaller than the magnetic force, despite the fact that two magnets correctly aligned would attract and stay together firmly.

Any two mass-containing things in the cosmos are subject to the basic natural force of gravity. According to the formula F = G * m1 * m2 / r2, where F is the force, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between them, the gravitational force between two objects varies in strength depending on their masses and the distance between them. The magnetic fields of two magnets are what create the force between them. Two magnets are aligned properly and it causes them to stick together tightly.

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The frequency of this microwave is 9.375 x 10^9 Hz

The frequency of a certain microwave having a wavelength of 0.032m will be 9.375 x 10^9 Hz.

Let:

Using the relation between frequency and wavelength:

                                    v = f.λ

                                    c = f(0.032m)

                  3 x 10^8m/s = f(0.032m)

                                     f = 3 x 10^8/0.032

                                    f = 9.375 x 10^9 Hz

Electromagnetic Waves always travel at the speed of light. Electromagnetic Waves possess both electric and magnetic fields aligned perpendicularly to each other.

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Answer:The continuity equation for a compressible liquid is a mathematical expression that relates the changes in fluid density, velocity, and volume to the changes in time. This equation can be written as:

∂ρ/∂t + (ρv)•∇ = 0

where:

ρ = fluid density

v = fluid velocity

∂/∂t = partial derivative with respect to time

∇ = del operator

The continuity equation expresses the principle of mass conservation, stating that the rate of change of fluid density in a fixed volume must be equal to the rate of flow of fluid into or out of that volume. This equation is commonly used in fluid dynamics to study the behavior of liquids and gases in various applications, such as in pipelines, pumps, valves, and compressors.

Explanation:

Option c is the answer. Magnetic domains are regions of atoms magnetically aligned.

Attractive spaces are districts in an attractive material where the attractive snapshots of the iotas are adjusted in a similar bearing. The attractive minutes are the small attractive fields made by the electrons in the material, which can adjust this way and that. In an attractive material, the spaces are adjusted in a similar bearing, making a net attractive field.

Without an outer attractive field, the spaces are haphazardly situated, which brings about a net attractive field of nothing. At the point when an outer attractive field is applied, the spaces adjust toward the outside field, making a more grounded net attractive field.

In this way, attractive spaces are locales of molecules attractively adjusted, and they assume a significant part in deciding the attractive properties of a material

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The photoelectric effect's cutoff wavelength is 295.98 nm. (b) The stopping potential is 2.70625 V if the incident light has a wavelength of 180 nm.

How to get KEmax=|eV0|, the equation for a photoelectron's stopping voltage. Hint: The stopping voltage (or stopping potential) refers to the voltage difference required to stop electrons from passing between plates and creating a flow in the photoelectric analysis.

Derivation of the Photoelectric Effect and the Stopping Potential Formula

According to Einstein's photoelectric equation

(0.6+2.14)eV

1242eVnm

​

=454nm

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Answer:

Explanation:

In order for one to carry something, they need to be exerting a force that is equal to the weight of the object. For Antonio therefore to hold the 1-pound bag, he needs to apply a 1-pound force.

Pounds measure the mass of an object. On his left hand Antonio has 1 pound and on the right he has 2. He is therefore carrying more mass on his right hand than on his left.

Both the balls hit the ground at the same time.

A body is said to be in freefall when it only moves in relation to the Earth's gravity. An external force exerted on the ball will cause its motion to accelerate. Gravitational acceleration is another name for this rate of free fall.

Due to the fact that the horizontally thrown ball's vertical motion is fully independent of its horizontal motion, both will strike the ground at the same time. As a result, both balls appear to be dropped and descending vertically at the same time in terms of vertical motion.

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Answer:

number 2

Explanation:

the 2 one is right

The initial center mass of the two bricks is 2 kg.

The center mass of the two bricks is determined by combining the momentum of the two bricks, with one as the reference point.

The initial center mass of the two bricks is calculated as follows;

\(M_{cm} = \frac{M_0 + M_1}{v_1 + v_2} \\\\M_{cm} = \frac{5(0) \ + \ 2(3)}{0 + 3} \\\\M_{cm} = 2 \ kg\)

Thus, the initial center mass of the two bricks is 2 kg.

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Doppler's effect:

The Doppler effect states that the frequency of sound increases as it source approaches you and it decreases as the source turns away from you.

When the ambulance drives past you, the pitch of the siren is lower. This is due to the fact that the frequency of the wavelength decreases.

A higher pitch means frequency increases and a lower pitch means frequency decreases.

Therefore, the correct answer is option B. decreases

Answer:

Clouds are made up of tiny water droplets. ... As more and more droplets join together they become too heavy and fall from the cloud as rain. Warm air can hold more moisture than cool air. When the warmer air is cooled and the moisture condenses, it often rains more heavily.

Explanation:

hope it helps

Answer:

You need to give the options but the formula is p=mv

Explanation:

The two  corresponding resonance distances  would be:

Resonance distances refer to the lengths of the air column in a resonance tube that result in resonance. Resonance occurs when the pressure variations at the two ends of the air column are in phase, which means that the distance between the two pressure nodes must be equal to an integer multiple of one-quarter wavelength (i.e., one-quarter of the wavelength of the sound wave). The length of the air column that results in resonance is referred to as a resonance distance. When the air column is at a resonance distance, it acts as a standing wave, with both pressure and velocity antinodes at the open end of the tube and pressure nodes and velocity antinodes at the closed end. The resonance distances can be used to calculate the speed of sound in the gas filling the tube.

For the first resonance, where the length of the air column is 18.8 cm, the distance between the pressure nodes must be equal to one-quarter of the wavelength of the sound wave at a frequency of 440 Hz:

(1/4)λ = 18.8 cm

Knowing the frequency and wavelength, the speed of sound in air can be calculated:

v = fλ

Substituting the values for frequency and wavelength:

v = (440 Hz)(18.8 cm) = 8332 cm/s

For the second resonance, where the length of the air column is 57.3 cm, the distance between the pressure nodes must be equal to three-quarters of the wavelength of the sound wave:

(3/4)λ = 57.3 cm

Solving for wavelength:

λ = (57.3 cm)(4) / 3 = 76 cm

The next resonance distance can be found by adding one-quarter of the wavelength to the previous resonance distance. In this case, the next resonance distance would be:

18.8 cm + (1/4)λ = 18.8 cm + (1/4)(76 cm) = 18.8 cm + 19 cm = 37.8 cm

If the tube were filled with a gas in which the speed of sound is 264 m/s, the wavelength of the 440 Hz sound wave would be:

λ = v / f = (264 m/s) / (440 Hz) = 0.6 m

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The Earth's tilted axis of rotation results in different regions of Earth receiving fewer or more hours of daylight at different times of the year.

The seasons are caused by Earth's tilted axis.

Different regions of the Earth are exposed to the Sun's strongest rays at various times of the year. Therefore, the Northern Hemisphere experiences summer when the North Pole tilts towards the Sun. Additionally, winter in the Northern Hemisphere occurs when the South Pole tilts towards the Sun.

Instead of the Earth orbiting the sun, day and night are caused by the planet rotating on its axis. One day encompasses both daytime and nighttime and is measured by how long it takes the Earth to complete one rotation around its axis.

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Astronauts could use Mars's natural resources to grow food. Mars's atmosphere consists mostly of carbon dioxide, an essential gas for plant survival, and Martian soil has the essential nutrients plants need to survive.

The electric field strength inside the capacitor is 7.05 × 10^4 V/m after the insulating handles are used to pull the electrodes away from each other until they are 1.1 cm apart.

To calculate the electric field strength inside the capacitor, we need to know the voltage across it and the distance between the plates. Let's assume that the capacitor has a capacitance of C = 8.85 × \(10^-12 F\)(a typical value for a small capacitor) and that it was initially charged to a voltage of V = 100 V.

When the insulating handles are used to pull the electrodes away from each other until they are 1.1 cm apart, the distance between the plates increases from d1 = 0.5 cm to d2 = 1.1 cm. The capacitance of the capacitor can be calculated using the formula C = εA/d, where ε is the permittivity of free space (8.85 × \(10^-12 F/m\)), A is the area of the plates, and d is the distance between the plates. Assuming the plates are parallel and have a circular shape with a radius of r = 2 cm, we can find the area \(A = πr^2 = 12.57 × 10^-4 m^2.\)

Using the formula C = εA/d, we can calculate the capacitance of the capacitor after the plates are pulled apart:

\(C2 = εA/d2 = (8.85 × 10^-12 F/m) × 12.57 × 10^-4 m^2 / (1.1 × 10^-2 m) = 1.01 × 10^-10 F\)

The voltage across the capacitor remains the same, so we can use the formula for capacitance and voltage to find the charge Q stored in the capacitor:

Q = CV = (8.85 ×\(10^-12 F\)) × 100 V = 8.85 ×\(10^-10 C\)

Finally, we can use the formula for electric field strength inside a capacitor, E = Q/(εA), to find the electric field strength inside the capacitor after the plates are pulled apart:

\(E = Q/(εA) = (8.85 × 10^-10 C) / (8.85 × 10^-12 F/m × 12.57 × 10^-4 m^2) = 7.05 × 10^4 V/m\)

Therefore, the electric field strength inside the capacitor is 7.05 × 10^4 V/m after the insulating handles are used to pull the electrodes away from each other until they are 1.1 cm apart.

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Answer:b a nonzero net force is acting on it

Explanation:

1) D; Forces are acting on it.

2) A; Graphs visually show the relationship between the variables under investigation.

This means that for a cars speed to change, according to this law, it means external forces have acted on it.

Thus, option D is correct.

D; Forces are acting on it.

Now, a table will just use rows and columns to show us the value of a force per given acceleration. It doesn't show us a trend in terms of line or curve like the way graph will show.

This means that graphs give a better visual representation of the relationship between two variables than tables will do.

Thus, option A is correct.

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One statement that is not true is that UV radiation is a type of electromagnetic radiation. It is also a type of ionizing radiation. UV radiation is actually a form of non-ionizing radiation.

UV radiation, or ultraviolet radiation, is a type of electromagnetic radiation that falls between visible light and X-rays on the electromagnetic spectrum. It is often categorized into three types: UVA, UVB, and UVC. Unlike ionizing radiation, such as X-rays and gamma rays, which have enough energy to remove tightly bound electrons from atoms or molecules, UV radiation lacks the necessary energy to ionize atoms or molecules. Instead, it primarily interacts with the outermost electrons of atoms or molecules, leading to chemical reactions and causing biological effects.

UV radiation is commonly associated with sunlight and has various effects on living organisms and materials. It can cause sunburn, premature aging of the skin, and an increased risk of skin cancer. Exposure to excessive UV radiation can also damage the eyes and impair the immune system. It is important to protect oneself from excessive UV exposure by wearing sunscreen, protective clothing, and sunglasses.

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True. An object that is translating can have angular momentum with respect to a point that is not its center of mass. This is because angular momentum is a measure of an object's rotation around a certain point, and does not necessarily depend on the object's center of mass.

An object that is translating can have angular momentum with respect to a point that is not its center of mass. This is because angular momentum depends on the reference point chosen.

When an object is translating, its linear momentum may create a rotational effect around a chosen point, thus generating angular momentum even if the point is not its center of mass.

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Answer: 20 minutes

Explanation:

Given the following :

Average speed of train = 120km/hr

Distance = 40km.

The time take by the train moving at an average speed of 120km/hr to cover a distance of 40km due is ;

Recall:

Speed = distance / time

Therefore,

Time taken = distance covered / speed

Time taken = 40km / 120km/hr

Time taken = 1/ 3 hr

Therefore, 1/3 rd of an hour equals

1/3 × 60 = 20 minutes.

Time taken) 20 minutes

Time taken by tain to cover distance is 20 minutes as:

Distance= 40 km

Speed= 120 km/h

Time= distance/speed

= 40/120

= 1/3 hour

= 20 min

or  =0.33 hrs

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