what is the average kinetic energy kavgkavgk_avg of the hydrogen molecules at a temperature of 100k100k ? assume that the molecules have only three degrees of freedom at this temperature

Answer:

. Carpet has a rougher surface than the bare floor, so there are more areas for the object to have friction with the rougher surface and slow down.

Explanation:

An object that is sliding across carpet slow down because of friction acting between its rougher surface and the surface of the object.

When two bodies come in touch with each other, friction, a sort of relative force, acts as a resistance. In other words, friction force opposes the relative motion of two bodies when they come into touch with one another.

When an object is sliding across carpet, it has to pass through a surface which is more rough compare to plane surface. So, frictional force will be greater in this case compare to plane surface. This frictional force resists the sliding of the object and the object slows down gradually.

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Answer:

The velocity of the cross-wind was 375 km/hr South

Explanation:

The given speed of the airplane, v₀ = 500.0 km/hr W

The direction the airplane is headed = West

The direction of the wind encountered = Southbound wind

The final velocity of the airplane, R = 625 km/hr

The final direction of the airplane = South West SW

Let vₐ represent the velocity of the cross-wind

Therefore, we have the given velocities in vector form as follows;

R = -500.0·i - vₐ·j

Also, we have;

\(\left | R \right | = 625 = \sqrt{v_0^2 + v_a^2} = \sqrt{(-500)^2 + (-v_a)^2}\)

625² = (-500)² + (-vₐ)²

(-vₐ)² = 625² - (-500)² = 140625

-vₐ = 375

vₐ = -375 km/hr North = 375 km/hr South

The velocity of the cross-wind = vₐ = 375 km/hr South

The velocity of the laundry bag before collision is 4.22 m/s. The collision of two objects in the absence of an external force does not affect the momentum of the two bodies.

Collision is the sudden, forceful coming together of two objects in direct contact with each other, such as, two billiard balls, a golf club and a ball, a hammer and a nail head, two cars when being coupled together.

In order to solve this problem, the principle of conservation of momentum can be applied. This tells us that the momentum of a system is preserved before and after a collision.

Both the movements i.e., bag and cart are positive, since they both move in the same direction. Now, the momentum of objects before the collision is equal to the momentum of objects after the collision.

This can be represented as:

m₁ × v₁ = m₂ × v₂

Here, m₁ = mass of the laundry bag = 22kg

v₁ = velocity of the laundry bag

m₂ = sum of the mass of laundry bag and cart = 9kg

v₂ = velocity of the moving cart = 3m/s

m₁ × v₁ = m₂ × v₂

22kg × v₁ = (22+9)kg × 3m/s

v₁ = (31kg × 3m/s)/ 22kg

v₁ = 93/22

v₁ = 4.22m/s.

Therefore, the velocity of the laundry bag before collision is 4.22m/s.

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The amount of heat released outside is 3.5 kJ and the coefficient of performance is 2.

The efficiency of the a machine or any device is the measure of effectiveness of the device. Efficiency describes how a machine converts input energy to output energy without wasting much of the input energy.

Mathematically, efficiency of a machine is given as;

E = output energy / input energy  x 100%

The coefficient of performance  (COP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work required.

The energy released outside = 3.5 kJ

COP = 3.5 kJ / 1.75 kJ

COP = 2

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The student turns in all directions with a compass and the needle always points north is the best evidence would best support the student's claim that earth has a magnetic field. Hence option 'B' is correct.

The area where the force of the magnetism works around the magnetic material or even a flowing electric charge is known as the magnetic field. a diagram that shows the magnetic field and how the magnetic force can be spread inside and outside of a magnetic material.

Electric ions in motion are what generate magnetism. The smallest building blocks of matter are termed atoms. There are electrons in every atom, which are charged entities. The electrons that make up an atom's nucleus, or centre, spin like tops.

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Heat transfer can be defined as the movement of thermal energy between two objects with different temperatures.

It can occur through three different methods: conduction, convection, and radiation.

In this scenario, the metal plate is immersed in hot oil that is at a constant temperature of 82°C. Because of this, the metal plate will gain thermal energy through convection, which is the transfer of heat through a fluid or gas due to the movement of particles in that fluid or gas. The convective heat transfer coefficient between the metal plate and the hot oil determines the rate at which heat is transferred between them.

The thickness of the metal plate is given as 10cm and its temperature is uniform at 15°C. The convective heat transfer coefficient between the metal plate and the hot oil is not given in the question.

In 100 words or less, we can summarize the scenario as follows: A metal plate with a thickness of 10cm and a uniform temperature of 15°C is immersed in a bath of hot oil that is at a constant temperature of 82°C. Heat transfer occurs through convection, which is the transfer of heat through a fluid or gas due to the movement of particles in that fluid or gas.

The convective heat transfer coefficient between the metal plate and the hot oil determines the rate at which heat is transferred between them. The convective heat transfer coefficient is not given in the question.

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The vast numbers of electrons in a coin don't fly off the surface because of electrostatic forces between the atoms of the coin.

The electrons in a coin are kept in their orbit by the electrostatic force of the nucleus of an atom. This is due to the fact that the negatively charged electrons are attracted to the positively charged protons in the nucleus. Electrons are kept in check by the Coulomb force that exists between the atoms of the coin.If the electrostatic forces are not present, the electrons will fly off the surface of the coin.

As a result, electrostatic forces are essential to keep the electrons in the coin in place. The electrostatic force is what holds the electrons in their orbits around the nucleus.

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The acceleration of an object is directly related to the net force exerted upon it and inversely related to the mass of the object.

answer : directly , inversely

Answer:

The uneven heating results in some of the atmosphere to be warmer than other parts and changes in volume and pressure which result in updrafts and can cause thunderstorms and other violent weather.

Explanation:

Generation of wind

Answer:

25

Explanation:

I just did this

Answer:

In a closed system, the total energy is conserved or remains the same as energy transformations take place.

Explanation:

The law of conservation of energy states that energy cannot be created or destroyed but can be transformed from one form to another.

This law of conservation of energy applies only to a closed system. A closed system is a system which does not exchange energy with its surroundings. All forms of energy conversions occurring within a closed system does not result in an increase or decrease of the total energy of the system, rather, energy remains constant. For example, the universe is a closed system in that all forms of energy conversions occurs within it and energy is not exchanged with an external environment. However, the earth is not a closed system as some of the energy it receives from the sun can be radiated out into space. Since it's an open system, its total energy can change.

The total energy of a closed system as energy conversion takes place

remains constant.

A closed system is the system which doesn't permit any movement of matter

in and out of the system. The closed system doesn't allow the exchange of

energy with its environment.

Since energy exchange isn't permitted in the closed system, the energy

remains constant during energy conversion.

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The number of significant figures in 00.6022009 is 7 .

The number of significant figures is 7.

Explanation:

Significant figures

Given :

The number 00.6022009

To find:

The number of significant figures in the number.

Solution

00.6022009

All zero’s preceding the first integers are not significant.

Zeros in between the integers are significant

So, the number of significant figures is 7.

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Answer:

7 meters, 2.8 meters

Explanation:

work done (nm) = force (n) * distance (m)

140= 20 * m

140/20 = m

m=7 meters

140= 50 * m

140/50 = m

m= 2.8 meters

In audio signal processing and acoustics, an echo is a reflection of sound that arrives at the listener with a delay after the direct sound.

Echo Time taken = 2×  Distancetraveled  ÷ velocity of sound

velocity = 115 ÷ 3= 38.33

∴echo time= 2×12÷38.33

=0.0062s

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​

Answer:

A) X3Z4

Explanation:

Answer:

A

Explanation:

Answer:

The median lead level in the water is 7 ppm.

Explanation:

To solve this problem, we need to use the formulas for electric potential and potential energy: Electric potential at a point due to a point charge q at a distance r from it is given by: \(V = k*q/r\)

Where k is the Coulomb constant \((k= 9.0 x 10^9 N*m^2/C^2)\), the potential energy of two point charges q1 and q2 separated by a distance r is given by:\(U = kq1q2/r\), where k is the Coulomb constant. (a) The electric potential at a point midway between the charges is the average of the potentials due to each charge at that point: \(V(midpoint) = (V1 + V2)/2\); where V1 is the potential due to Q1 and V2 is the potential due to Q2. V1 \(= k*Q1/r1\); where r1 = 22.5 cm (half the distance between the charges)

\(V1 = (9.0 x 10^9 N*m^2/C^2) * (4.10 x 10^-9 C) / (0.225 m)\)

\(V1 = 164.0 V. Similarly, V2 = -105.3 V = 29.3 V\)

(b) The potential energy of the pair of charges is given by: U = kQ1Q2/r, where r is the distance between the charges.

\(U = (9.0 x 10^9 N*m^2/C^2) * (4.10 x 10^-9 C) * (-2.60 x 10^-9 C) / (0.45 m)U = -1.34 x 10^-16 J\)

(c) The algebraic sign of the potential energy indicates whether the work done on the system is positive or negative. In this case, the negative sign of the potential energy indicates that the charges attract each other and that negative work must be done to separate them.

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The correct option is option e) cross product

The cross-product is a new way of "multiplying" two vectors. It results in a new vector that is perpendicular to both the original vectors and its magnitude is given by the area of the parallelogram formed by the two original vectors.

In three-dimensional space, cross-product is a binary operation on two vectors. It yields a vector perpendicular to both vectors. a b represents the vector product of two vectors, a and b. Its resulting vector is parallel to a and b. Cross goods are another name for vector products.

The cross-product has four basic applications:

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Answer:

RAP strategy is one such paraphrasing strategy. This meta-cognitive strategy is also an acronym mnemonic, and assists students in recollecting facts, with paraphrasing and helps to improve their reading comprehension. Teaching the RAP method: The acronym, RAP stands for Read, Ask and Put.

Answer:

75m

Explanation:

Given parameters:

Distance covered by the boat = 15m

Time taken = 8s

Unknown:

Distance covered by the boat in 40s  = ?

Solution:

To solve this problem, we need to find the speed of the boat first;

    Speed = \(\frac{distance}{time}\)

Insert the parameters and solve;

    Speed  =\(\frac{15}{8}\) m/s

Now;

The boat will travel;    

    Distance  = speed x time

    Distance =   \(\frac{15}{8}\)  x 40  = 75m

Answer:

yes

Explanation:

...........................

Answer:Bike or walk to school instead of taking a gasoline powered car.

Explanation: gasoline is not infinite. trees can be replanted and regrown. electricity can by generated and is not a natural recourse.

Answer:

Average acceleration = 0.45 m/s²

Explanation:

Given the following data;

Initial velocity, u = 0m/s

Final velocity, v = 8.6 m/s

Time, t= 19 seconds

To find the average acceleration;

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of final speed from the initial speed all over time.

Mathematically, acceleration is given by the formula;

\(Acceleration = \frac{initial speed - final speed}{time}\)

Substituting into the formula, we have;

Acceleration = (8.6 - 0)/19

Acceleration = 8.6/19

Average acceleration = 0.45 m/s²

Answer:

Filiberto experimenta una deceleración de \(2\,\frac{m}{s^{2}}\).

Explanation:

(The problem was written in Spanish. Hence, explanation will be held in Spanish).

Asúmase que Filiberto se distrae por 2 segundos, puesto que un par equivale a dos, y que el vehículo experimenta un aceleración constante. La deceleración experimentada por el vehículo se deriva de la siguiente fórmula:

\(a = \frac{v-v_{o}}{\Delta t}\)

\(a = \frac{40\,\frac{m}{s}-90\,\frac{m}{s} }{2\,s}\)

\(a = -25\,\frac{m}{s^{2}}\)

Filiberto experimenta una deceleración de \(2\,\frac{m}{s^{2}}\).

The answers are- (a) 2 soft drinks. (b) Uncertain. (c) Not necessarily.

(d) No bliss point. and, (e) Steeper indifference curves.

(a) If Elmo has 4 quarters and 2 dimes in his pockets, he can buy 2 soft drinks. Since each soft drink requires two quarters and a dime, having double the amount of each coin allows him to make two purchases.

(b) Elmo's preferences between dimes and quarters may or may not be convex. Convex preferences imply that as Elmo increases the quantity of one type of money (quarters or dimes), the marginal utility he derives from each additional unit of that money diminishes. If Elmo's preference for soft drinks is based solely on the ability to purchase them and not on any diminishing marginal utility of the coins themselves, then his preferences may not exhibit convexity.

(c) Elmo does not necessarily always prefer more of both kinds of money to less. Given the specific context of the Coke machine, Elmo's only concern is to have the exact change required to obtain a soft drink. As long as he has the necessary combination of two quarters and a dime, having additional coins does not increase his utility further.

(d) Elmo does not have a bliss point in this scenario. A bliss point refers to the combination of goods or factors that maximizes an individual's utility or satisfaction. Since Elmo's sole objective is to purchase soft drinks from the Coke machine, his utility is maximized when he has the exact change required (two quarters and a dime). Having more coins does not enhance his utility beyond being able to buy a single soft drink.

(e) If Elmo had arrived at the Coke machine on a Saturday, with the drugstore across the street open, his preferences would change. Instead of being limited to the specific combination of two quarters and a dime, he could now use any combination of quarters and dimes to purchase as much Coke as he wants at a price of 4 cents per ounce.

In this case, Elmo's indifference curves between quarters and dimes would exhibit a downward slope, indicating that he is willing to trade off some quantity of one coin for a corresponding increase in the other, while still maintaining the same level of utility. The indifference curves would be steeper than the ones in the previous scenario, as Elmo can now acquire more soft drinks by having a larger combination of quarters and dimes.

These new indifference curves reflect Elmo's preference for more quarters and dimes, as they enable him to buy more Coke at the drugstore. The curves demonstrate that Elmo is willing to sacrifice some quantity of quarters to obtain additional dimes or vice versa, as long as the overall combination allows him to maximize the quantity of Coke he can purchase.

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Answer:

Explanation:

speed = distance / time

          = 15 meters / 3 seconds

          = 5 meter / sec.

Answer:5/sec

Explanation:

We noticed that our cart was moving down the track at a continuous acceleration. This suggests that the cart was under a continuous force and that the constant force was being generated by the mass of the cart.

It is not possible for a thing to "have in it" or "contain" a force. One object experiences a force from another. The idea of a force includes both inanimate items and living things. A force can lower or modify the velocity of a massed item. Two simple ways to illustrate force are to push or pull. Given that it has both a magnitude and a direction, a force is a vector quantity.

Both direct force and distant action two different types of forces exist. It's clear that you utilize force consistently. Forces are just push and pull. You exert force on an object when you push or pull against it.

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Explanation:

W=mg

m=W/g

m=588/9.8 = 60kg.

hope this helps you.

The indices of refraction of media 1, 2, and 3 is n1 = √(n2 n3).

To determine the relationship between the indices of refraction of the three media shown in the diagram, we can use Snell's Law, which states that:

n1 sin θ1 = n2 sin θ2

and

n2 sin θ2 = n3 sin θ3

where n1, n2, and n3 are the indices of refraction of the three media, and θ1, θ2, and θ3 are the angles of incidence, refraction, and transmission, respectively.

From the diagram, we can see that the angle of incidence θ1 is the same as the angle of transmission θ3, since the light rays are parallel. Therefore, we can write

n1 sin θ1 = n3 sin θ3

Substituting n2 sin θ2 from the first equation, we get

n1 sin θ1 = n3 (n2 sin θ1) / n1

Simplifying, we get

n1² sin²θ1 = n2 n3 sin²θ1

Dividing by sin² θ1 and taking the square root, we get:

n1 = √(n2 n3)

Therefore, we can conclude that the index of refraction of medium 1 (n1) is equal to the square root of the product of the indices of refraction of media 2 and 3 (n2 and n3).

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--The given question is incomplete, the complete question is given below "  Parallel light rays cross interfaces from medium 1 into medium 2 and then into medium 3 as shown below. What can we say about the relative sizes of the indices of refraction of those media."--