What is the effect of frequency on the way our ear perceives sound?

Answer:

Heat capacity is the ratio of the amount of heat energy transferred to an object to the resulting increase in its temperature. Molar heat capacity is a measure of the amount of heat necessary to raise the temperature of one mole of a pure substance by one degree K.

Explanation:

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Moving at the same velocity to the East which means that they are both on the same planet in space.

Relative to the center of the Earth, a person on the North Pole is moving at the same velocity to the East because both are present on the same planet in space.

The whole planet of earth spins in the same direction as well as with the same velocity so we can conclude that option A is the correct statement about direction and velocity of the earth.

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Answer:

The stone thrown upward lands farther away from the building.

Explanation:

Given that,

Angle = 30° above the horizontal

Speed = 18.0 m/s

Angle = 30° below the horizontal

Suppose, Which stone lands farther away from the building ?

We need to find which stone lands farther away from the building

Using formula of range

\(R=v_{x}t\)

The horizontal velocity for the both stones is equal but the time will be different.

The time of stone thrown upward will be greater than that of downward.

Hence, The stone thrown upward lands farther away from the building.

Answer:6m/s

Explanation:as you can see before twenty seconds there was no change in speed,but between twenty to thirty seconds,the speed changed from 0m/s to 6m/s,so change in speed is 6m/s.

The speed of an object between 20 and 30 seconds shown in the graph is 70 m/s.

Given:

Time, ΔT = 30-20 = 10s

Acceleration, a = 7 m/s²

The speed can be computed from the acceleration and time. The standard unit of velocity is meters per second.

For the given case, the speed can be computed from the acceleration and time given in the graph.

The speed is given as:

a =  v/t

v = at

v = 7×10

v = 70 m/s

Hence, the speed of an object between 20 and 30 seconds shown in the graph is 70 m/s.

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No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.

This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.

i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.

ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.

The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.

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Fourier's Law of Heat Conduction:

1. Heat flows through things more when they are hotter.

2. Heat flows more easily through materials that are hotter and thinner, or have better ability at letting heat through.

3. Heat doesn't flow through things as much when they are thicker or not good at letting heat through.

Answer:

.8215 MJ <- question is saying its hard for heat to go thru a thick brick wall <- thats why they are great to make homes with <- in winter brick homes stay warm!

Explanation:

Heat Flow Calculation.

The brick wall (of thermal conductivity 0.32 W/m · ◦ C) of a building has dimensions of 2.7 m by 4 m and is 11 cm thick. How much heat flows through the wall in a 18.4 h period when the average inside and outside temperatures are, respectively, 11◦C and 7◦C? Answer in units of MJ.

To calculate the heat flow through the wall, we can use Fourier's law of heat conduction, which states that the heat flow through a material is proportional to the temperature difference across it and inversely proportional to its thickness and thermal conductivity:

Heat flow (Q) = (thermal conductivity) x (area) x (temperature difference) / (thickness)

Area = length x width = 2.7 m x 4 m = 10.8 m^2

Next, we need to calculate the temperature difference across the wall:

Temperature difference = inside temperature - outside temperature = 11◦C - 7◦C = 4◦C

Now we can calculate the heat flow through the wall:

Q = (0.32 W/m · ◦C) x (10.8 m^2) x (4◦C) / (0.11 m) = 125.45 W

To convert the heat flow to energy, we need to multiply by the time period:

Energy = Power x Time = 125.45 W x (18.4 h x 3600 s/h) = 821503.68 J

Finally, we convert Joules to MegaJoules:

Energy in MJ = 821503.68 J / 1,000,000 = 0.8215 MJ

Therefore, the heat flow through the wall over an 18.4 hour period is 0.8215 MJ.

The formula used to calculate the heat flow through a material is called Fourier's law of heat conduction. It is given by:

Heat flow (Q) = (thermal conductivity) x (area) x (temperature difference) / (thickness)

The formula used to convert power to energy is:

Energy = Power x Time

In this case, we used the unit of Watts for power and the unit of Joules for energy.

1. Insulation reduces heat flow: Insulation is a special material that helps stop heat from flowing through walls, ceilings, and floors.

2. Temperature difference: When it's colder outside than inside, heat tries to escape from the warm house to the cool outdoors.

3. Insulation slows down heat flow: But when a house is insulated well, the insulation slows down the heat flow, making it harder for heat to escape.

4. Factors affecting heat loss: The amount of heat lost from a house depends on things like the thickness of the walls, the type of insulation used, and the difference in temperature between inside and outside.

5. Using Fourier's law: Engineers and architects can use a special math formula called Fourier's law to figure out how much heat is likely to escape from a house under different conditions, and use that information to decide on the best insulation and building materials to use to save energy.

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The approximate value for the angle of the hill when a cylinder has a radius r, it rolls down a hill with a linear acceleration a, is θ ≈ a/(g + μ).

Let's first define the variables and parameters we have in this problem:

r: radius of the cylinder

a: linear acceleration of the cylinder

θ: angle of the hill

When the cylinder rolls down the hill, there are two forces acting on it: the force of gravity (mg) and the force of friction (f). The force of gravity can be broken down into its components perpendicular (mgcosθ) and parallel (mgsinθ) to the surface of the hill.

The force of friction acts in the opposite direction of the cylinder's motion and is given by f = μN, where μ is the coefficient of friction and N is the normal force. The normal force is equal to the perpendicular component of the force of gravity, so N = mgcosθ.

The net force acting on the cylinder is given by F = mgsinθ - μmgcosθ = ma, where m is the mass of the cylinder. We can solve for θ to get:

sinθ - μcosθ = a/g

where g is the acceleration due to gravity. We can use a numerical method like Newton-Raphson to solve this equation for θ, or we can make some approximations to simplify the equation. If we assume that μ is small and sinθ ≈ θ (valid for small angles), we can rewrite the equation as:

θ ≈ a/(g + μ)

This gives us an approximate value for the angle of the hill. However, if we want a more precise answer, we can use the exact equation and plug in the values of r, a, and μ to solve for θ.

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Moving psychology into the category of experimental science was a very significant step.

Psychology as a field of experimental study start in 1854 in Leipzig established a laboratory to test data led to a vital shift in psychology from merely being a company of philosophical ideas to becoming an avenue for experimentation and research.

Psychology flourished in America through the mid-to late-1800s. William James emerged as one of the major American psychologists throughout this period and publishing his classic textbook, "The truth of Psychology," established him as the father of American psychology.

So we can conclude that  Physiology also donate to psychology's eventual emergence as a scientific discipline,

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In this case, you traveled 30 miles west and 10 miles east, so your displacement from your home is 20 miles to the west. The direction of the displacement is the same as the direction of the final position, which is to the west, away from your home.

Displacement is a vector quantity that represents the change in position of an object relative to its starting point.

You travelled in west = 30 miles

You travelled in east = 10 miles back

Displacement = 30 - 10 = 20 miles in west direction

It is calculated as the final position minus the initial position, and it measures the distance and direction of an object's change in position. Displacement can be expressed in any unit of length, such as meters, feet, or miles. It is an important concept in physics and engineering, as it provides a way to quantify the change in position of an object over time. Displacement is related to other physical quantities such as velocity, acceleration, and time, and it is an essential component of many equations used to describe the motion of objects in physics. Displacement is also an important concept in everyday life, as it is used to describe the position of objects and the change in their positions over time.

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Temperature is the degree of hotness or coldness of an object or substance. The SI unit of temperature is Kelvin."97%": The question suggests that a reaction must be run at a specific temperature to achieve 97% yield or completion. Yield refers to the amount of product obtained from a reaction.

To achieve 97% yield or completion, the reaction must be run at a specific temperature. Temperature plays an essential role in chemical reactions since it affects the rate of reaction, activation energy, and equilibrium. The temperature at which a reaction runs optimally, producing the most product, is known as the reaction's optimum temperature. As a result, the temperature must be controlled during a chemical reaction.To achieve 97%, the reaction must be run at a specific temperature.

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1. s = 0.29 s

2. m= 0.23m

3. k.E = 2.1J

i. d = ½ at2

t = (2d/a) = (2 A 0.40 m/9.8 m/s ) = 0.2857142857 s = ½ 2 ½

0.29 s

ii. d = vt = 0.8 m/s A 0.2857142857 s = 0.2285714286 m = 0.23 m

iii. KE = KE + PE

KEf

= ½ mv + mgh = 0.5 A 0.50 kg A (0.8 m/s) + 0.50 kg A 9.8 m/s A 0.40 m = 2.12 J =  2.1 J

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Answer:

Explanation:

There are three states of matter; solid, liquid and gaseous states.

The solid state of matter has it's particles tightly packed with very restricted  or no movement within the molecule hence the reason for it's definite shape.

The liquid state of matter has it's particles with a free movement (better than solid but not as free as gases) within the molecule hence it's particles are loosely packed within the molecule. Hence, they (liquids) assume the shape of the container in which they are stored and they move freely when released from the container.

The gaseous state of matter has it's particles totally loosely packed as a result of it's particles moving freely and colliding against one another.

Thus, we can use the above descriptions to answer the statements from the question.

1) The atoms in a  ----- are closely packed, but able to slide past each other. Answer: From the description above, it can be deduced that the atoms here are in a solid because the particles within a solid are closely packed.

2) The atoms in a  -------- spread as far apart as possible.

Answer: The atoms here are in gaseous form because, as described earlier, they are loosely packed and  can thus be as far apart as possible.

3) A  ----- has a definite shape and volume.

Answer: As described earlier, a solid substance would have a definite shape and volume because it's particles are tightly packed.

4) The shape of a  ----- can change, but the volume is definite.

Answer: The substance here is a liquid because the particles are free (but not as free as gases) and would have a definite volume but will assume the shape of the any container they are placed in (hence they have an irregular shape).

Answer:

The atoms in a

✔ liquid

are closely packed, but able to slide past each other.

The atoms in a

✔ gas

spread as far apart as possible.

A

✔ solid

has a definite shape and volume.

The shape of a

✔ liquid

can change, but the volume is definite.

Explanation:

Answer:

This was done by measuring the acceleration due to gravity as accurately as possible and then calculating the mass of Earth M from the relationship Newton's universal law of gravitation gives mg=GmMr2 m g = G m M r 2 , where m is the mass of the object, M is the mass of Earth, and r is the distance .

A cylindrical bit of graphite with a radius of 0.7 mm is subjected to a potential differential of 24 V along its length by the student.

Pencils, lubricants, crucibles, casting facings, polishes, arc lights, batteries, electric motor brushes, and nuclear reactor cores all include graphite. China, India, Brazil, N.korea, and Canada all mine large amounts of it. Graphite was inadvertently created for the first time by Edward G.

It is special in that it possesses traits common to both metals and non-metals, including flexibility without being elastic, high thermal and electrical conductivity, high refractoriness, and chemical inertness. Due to its low X-ray and neutron absorption, graphite is a particularly useful material.

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Answer:

same weight

Explanation:

because same

The Schrödinger equation and the Born Rule, together form the foundation of quantum mechanics and are essential for understanding and predicting the behavior of quantum systems.

The two fundamental laws that lie at the heart of quantum mechanics are:

1. The Schrödinger equation: The Schrödinger equation is the fundamental equation in quantum mechanics that describes the behavior of quantum systems. It mathematically represents the wave function of a quantum system and how it evolves over time. The Schrödinger equation provides a probabilistic description of the behavior of particles and predicts the probability distribution of their various properties, such as position, momentum, and energy.

2. The Born Rule or Postulate: The Born Rule, also known as the Born Postulate, is a fundamental principle in quantum mechanics that connects the wave function of a system to the probabilities of different measurement outcomes. According to the Born Rule, the square of the amplitude of the wave function at a given point provides the probability of finding a particle in a particular state or having a specific measurement result. It links the mathematical wave function description of a system to the actual observed probabilities when making measurements on the system.

These two laws, the Schrödinger equation and the Born Rule, together form the foundation of quantum mechanics and are essential for understanding and predicting the behavior of quantum systems. They provide the mathematical framework to describe the wave-particle duality, superposition, entanglement, and other fundamental phenomena observed in the quantum world.

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Answer:

Explanation:

{ r, θ ) = [ r cosθ i , r sinθ j ]

( 95m , 162°) = [ 95 cos 162 i, 95 sin 162 j]

( 95m , 162°) = [ 95 * -0.951 i, 95 * 0.309 j]

( 95m , 162°) = -90.342 i, 29.355 j =

[ -90.34 m i , 29.36 m j ]

Therefore, the displacement of x and u components are

x displacement = -90.35 m and y displacement = 29.36 m

round appropriately

Dalton's first theory states, that all matter is made up of atoms (which cannot be divided). Continuing with this theory in mind, Dalton also states that all atoms of an element are identical in MASS and PROPERTIES. Lastly, compounds are combinations of TWO or MORE different types of atoms.

With Dalton's reasoning, water contains two atoms of hydrogen and one atom of oxygen; All water molecules are exactly like every other water molecule, and have the same 2:1 ratio.

Hope this helps!

-Moiselle

Explanation:

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Answer: 20,000 seconds

Explanation: there are 1000 miles in a km, so 200km is 200,000 miles

Answer:

the future of c DC and hi to mere ko pahchani pahchani pahchani pahchani pahchani pahchani pahchani pahchani pahchani the future of c DC and hi

Explanation:

v I will be in the future of c DC and hi to everyone who has a few days ago I will be in the future of c DC and hi to everyone and their children of God I will be in the future of c DC and hi to everyone who has a few days ago I will be in the future of c DC and their families of the attached document and their families will get back from try to the the future can vsnydb behind f

The weight of the body on the surface of mars would be 333.9 Newtons.

Weight is the force exerted by the earth on an object at the surface of the earth and this force is directed towards the center of the earth. Mathematically -

W = mg

where -

[m] is the mass of object

[g] is acceleration due to gravity

Given is a body that weighs 900N on the surface of earth. Mars is a planet whose mass is one ninth and radius is one half that of the earth. The same body is now placed on mars.

Since the weight of the body is 900 N on earth, we can write -

W = mg

900 = m x 10

m = 900/10

m = 90 Kg

Now, we know for a body of mass [m] on a planet of mass [M], the gravitational force exerted by planet on the body will be -

F = GMm/r²

but

F = W = mg

So, we can write -

mg = GMm/r²

g = GM/r²

For the planet of mars, we can write -

g = GM[mars]/r[mars]²

g = (6.6743 × 10⁻¹¹ x 0.65 x 10²⁴)/(3185.5 x 10³)

g = 3.71 m/s²

So, the weight of the body on mars will be -

W = mg = 90 x 3.71

W = 333.9 N

Therefore, the weight of the body on the surface of mars would be 333.9 Newtons.

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Answer:

1.6 m/s

Explanation:

First you need to find the momentums of each disc by multiplying their velocities with mass.

disc 1: 7*1= 7 kg m/s

disc 2: 1*9= 9 kg m/s

Second, you need to find the total momentum of the system by adding the momentums of each sphere.

9+7= 16 kg m/s

Because momentum is conserved, this is equal to the momentum of the composite body.

Finally, to find the composite body's velocity, divide its total momentum by its mass. This is because mass*velocity=momentum

16/10=1.6

The velocity of the composite body is 1.6 m/s.

The number of photons entering the eye depends on the light intensity, wavelength, and pupil diameter. In this case, the light intensity is 4.00 10-11 w/m2 at a central wavelength of 500 nm.

The pupil diameter is 8.00 mm. To calculate the number of photons entering the eye, we must first convert the light intensity to photons per second. We can use the formula J = hν/t, where h is Planck’s constant (6.626 10-34 J s), ν is the frequency of the light (2.998 10+14 Hz for 500 nm light), and t is the time.

The intensity of the light is then given by I = J/A, where A is the area of the pupil. Plugging in the values, we get I = (6.626 10-34 J s)(2.998 10+14 Hz)/(3.14159 mm2) = 4.00 10-11 w/m2.

Finally, we can calculate the number of photons entering the eye using the formula N = I/E, where E is the energy of a single photon. Plugging in the values, we get N = (4.00 10-11 w/m2)/(3.62 10-19 J) = 1.10 10+14 photons/s. Thus, 1.1 x 10^14 photons enter the eye per second.

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The 0.0104 moles NO2 are reacted.

What is mole?

Chemists use the mole as a crucial unit of measurement. When you have a mole of something, you have 602,214,076,000,000,000,000,000 of that specific thing, just like when you have a dozen eggs, you have twelve eggs. Mole units are used by chemists to measure extremely small objects, such as atoms, molecules, or other particles.

What is concentration?

A solution's concentration is an indicator of how much solute has dissolved in a specific volume of solvent or solution. When there is a significant amount of dissolved solute in a solution, it is said to be "concentrated."

0.00520 moles

N2O5 x 4 moles NO2 / 2 moles

N2O5 = 0.0104 moles NO2 are reacted.

Therefore, the 0.0104 moles NO2 are reacted.

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Action-reaction pairs are forces that operate on separate objects in opposing directions and at identical magnitudes. Never do they affect the same thing. We learn that forces are interactions from Newton's third law.

When two bodies contact, they exert an equal and opposite force on one another in accordance with Newton's third rule of motion. Action-reaction forces are made up of these forces.

Think about how a baseball bat and a ball interact, for instance. The bat forces the ball to the right while the baseball forces the bat to the left. The action-reaction force pair is made up of these two forces acting on two separate objects together.

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A bowling ball is dropped off a 300 meter high bridge. A water bottle is dropped from the same position 3 seconds later. the ground is the water bottle, when the bowling ball has a speed of 64 m/s is zero.

Speed is measured as the ratio of distance to the time in which the distance was covered. Speed is a scalar quantity as it has only direction and no magnitude.

The formula of speed is represented as s=d/t, Where, s is the speed in m.s-1, d is the distance traveled in m, t is the time taken in s

There are four types of speed such as Uniform speed, Variable speed, Average speed, Instantaneous speed

Uniform speed is an uniform speed when the object covers equal distance at equal time intervals, variable speed is defined as when the object covers a different distance at equal intervals of times.

Average speed is defined as the uniform speed the ratio of total distance travelled by an object to the total time taken by the object.

Instantaneous speed is defined as an object is moving with variable speed, then the speed at any instant of time is known as instantaneous speed.

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