A girl pushes a wagon at constant velocity. If the
momentum of the wagon is 50 kg*m/s at a
velocity of 2 m/s, the mass of the wagon is what

Dalton's atomic theory was proposed by John Dalton in the early 19th century and it formed the foundation of modern atomic theory. The theory states that all matter is made up of atoms, which are indivisible and indestructible. However, over time, scientists have discovered that some parts of Dalton's atomic theory are incorrect.

One of the parts of Dalton's atomic theory that has been proven to be incorrect is the idea that atoms are indivisible. It is now known that atoms are made up of even smaller particles, such as protons, neutrons, and electrons. This discovery was made through the study of nuclear physics and the development of the atomic model.

Another part of Dalton's atomic theory that has been disproven is the idea that all atoms of a given element are identical. It is now known that atoms of the same element can have different numbers of neutrons and are known as isotopes. This discovery was made through the study of radioactivity and the development of mass spectrometry.

Lastly, Dalton's atomic theory stated that atoms of different elements are fundamentally different, and cannot be converted into one another. However, this idea is incorrect as it is now known that atoms can be transformed into other elements through nuclear reactions, such as fusion and fission.

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Answer:

A.) Oxidation

Explanation:

:p

Hydrogen reacts with oxygen, hydrogen loses electrons. The term

applies to what happens to hydrogen in this reaction is

A. Oxidation

Oxidation is a process where a substance: Loses one or more electrons or gains an oxygen atom or we can say that oxidation is a process which involves the addition of oxygen or any electronegative element or the removal of hydrogen or any electropositive element.

Reduction is the gain of electrons or reduction is a process which involves the addition of hydrogen or any electropositive element or the removal of oxygen or any electronegative element.

A synthesis reaction is a type of reaction in which multiple reactants combine to form a single product. Synthesis reactions release energy in the form of heat and light, so they are exothermic.  

correct option is A. Oxidation

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The pressure of the gas is 2.25 atm.

We can use the ideal gas law to calculate the pressure of the gas. The ideal gas law states that PV=nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant and T is the temperature.

In this problem, we are given the volume (V=1.80 L), the molar mass of the gas (m=0.226 g), and the temperature (T=192 m/s). We can use this information to calculate the number of moles of gas present in the container.

First, we need to convert the molar mass of the gas from grams to moles. We can do this using the equation m=nM, where m is the mass of the gas, n is the number of moles and M is the molar mass.

We can solve for n to get n=m/M. Plugging in the values for m and M, we get n=0.226 g/28.02 g/mol = 0.008 mol.

Now that we have the number of moles, we can use the ideal gas law to calculate the pressure of the gas. Plugging in the values for n, V, and T, we get

P=nRT/V = 0.008 mol * 8.314 L·atm/mol·K * 192 m/s/K/1.80 L = 2.25 atm.

Therefore, the pressure of the gas is 2.25 atm.

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The time domain expression for each voltage is, V(t) = Vmax * sin(376.99t + φ)

Analyzing mathematical functions, physical signals, or time series of economic or environmental data with respect to time is referred to as working in the "time domain." In the time domain, the value of the signal or function is known for all real numbers, for continuous time, or for discrete time, for distinct discrete instants.

The time domain expression for each voltage with a frequency of f=60Hz can be found as,

1. Identify the angular frequency (ω) using the formula: ω = 2πf
2. Write the general time domain expression for voltage: V(t) = Vmax * sin(ωt + φ)

Calculating the angular frequency (ω),
ω = 2πf = 2π(60Hz) ≈ 376.99 rad/s

Writing the time domain expression for voltage,
V(t) = Vmax * sin(ωt + φ)

So, with a frequency of f=60Hz, the time domain expression for each voltage is:
V(t) = Vmax * sin(376.99t + φ)

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Answer:

A.   .33m

Explanation:

Have a good day.

Answer:

atoms and molecules

Explanation:

as opposed to being continuous or just including particles). On the following page, the idea is stated as one of four concepts in Dalton's theory: “All matter is composed of tiny, indivisible particles called atoms”

Answer: atoms

Matter is made of atoms, the basic building blocks. Atoms are made of protons, neutrons and electrons. The answer is atoms.

Hope it helps!

It is 22.5 cm far the upright image from your face if it is 6 times larger, when radius of curvature is given.

Concave mirror has a reflective surface that is curved inward and is away from the light source and it reflects light inward to one focal point.

Given radius of curvature=54 cm

Focal length= r/2

= 54/2

=27 cm

v is the distance to the virtual image and u is the distance of the object in front of the mirror.

Given v = -6u

As we know that ; 1/f = 1/u +1/v

So now, 1/f = 1/u - 1/6u

= 5/6 u

∴ u = 5f/6= (5* 27)/6

u = 22.5 cm

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Inside the sphere, the total charge is 40a4/40.

Apply the formula Q=DdS, where D is the electric flux density inside the sphere and S is the sphere's surface area.

The electric flux density inside a dielectric sphere of radius a centered at the origin is represented as D=R0R (C/m2).

Substitute D for Q in the formula and integrate across the sphere's surface area.

A sphere's surface area is 4r2.

Integrate over r from 0 to a, 0 to and 0 to 2.

Simplify the integral to get Q=4a4/40.

When matter is placed in an electromagnetic field, its electric charge causes it to experience a force. Electric charge can be positive or negative (often carried by protons and electrons). Charges that are similar repel each other, but charges that are distinct attract each other. There is no net charge on an electrically neutral thing.

Classical electrodynamics is the early knowledge of how charged substances interact, and it is still true for concerns that do not need the consideration of quantum events. he nets charge of an isolated system, which is the total of positive and negative charge, is a conserved attribute; it cannot change. Electric charge is carried by subatomic particles.

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Answer:

D is the answer

Explanation:

But do u know if im right test it out then surprise

The electromagnetic waves described in the reading are different in two ways, and that is Frequency and velocity. Hence, option D is correct.

A magnetic field and an electric field vibrate together to produce electromagnetic waves, often known as EM waves. In other terms, magnetic and electric fields that are oscillating make up electromagnetic waves (EM).

When a magnetic field and an electric field interact, electromagnetic waves are created. The term "electromagnetic waves" is used to describe them. An electromagnetic wave has an electric field and a magnetic field that are perpendicular to one another. They are likewise perpendicular to the EM wave's direction.

The wavelength and frequency of electromagnetic waves vary. Electromagnetic waves with longer wavelengths have lower frequencies, whereas those with shorter wavelengths have higher frequencies. Waves at higher frequencies carry more power. A wave's wavelength and frequency together determine its speed.

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(a) The equation derived from energy considerations is

5v² = 318x - 5x² - 2420.

(b) To ensure the validity of the equation, x must be greater than 22 meters.

(c) The maximum value of x, when the cord is fully stretched, is approximately 4.45 meters.

(d) (i) At x = 31.8 meters, the speed of the bungee jumper is maximized according to the derived equation.

(d) (ii) The maximum speed of the bungee jumper is approximately 25.2 m/s, obtained from the equation and analysis of energy conservation.

(a) By considering energy, we can analyze the motion of the bungee jumper. Initially, the bungee jumper is at a height of 60 meters above the ground.

As the jumper falls, the elastic cord stretches and exerts an upward force on the jumper due to Hooke's Law.

The total energy of the system is conserved, and it can be divided into two components:

At the top of the fall (x = 0), all the energy is in the form of GPE:

        GPE = mgh (Gravitational potential energy)

When the bungee jumper has fallen x meters, his speed is vm m/s.

At this point, his potential energy has been converted into kinetic energy (KE) and elastic potential energy:

           KE = (1/2)mv² (Kinetic energy)

          EPE = (1/2)kx² (Elastic potential energy)

Since air resistance is negligible, the total energy remains constant:

           GPE + EPE = KE

          49 * 9.8 * 60 + (1/2)(1078)x² = (1/2) * 49 * v²

Substituting the given values:

          5v² + 318x - 5x² = 2420

(b) The equation in part (a) is derived under the assumption that the cord is taut and stretched.

(c) To find the maximum value of x, we need to determine the point at which the bungee cord reaches its maximum stretch.

              kx = mg

         1078x = 49 * 9.8

                 x = (49 * 9.8) / 1078

                 x ≈ 4.45 meters

(d) (i) To find the speed of the bungee jumper when it is at a maximum, we can differentiate the equation derived in part (a) with respect to x and set it equal to zero to find the maximum point.

Differentiating the equation:

     d(5v² + 318x - 5x²) / dx = 0

                            318 - 10x = 0

                                    10x = 318

                                        x = 31.8 meters

(ii) Now that we have the value of x at the maximum speed, we can substitute it back into the equation to find the maximum speed (vm):

       5v² + 318(31.8) - 5(31.8)² = 2420

       5v² ≈ 3178.4

         v² ≈ 635.68

        v ≈ √(635.68)

        v ≈ 25.2 m/s

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Answer: Wavelength

Explanation:

Answer:

C) wavelength

Explanation:

I hope this is right, have a nice day!

Answer:jdhddj Nd

Explanation:xbxnbxx period

The answer is that the final volume of the gas is one-half the initial volume.

According to the Ideal Gas Law, PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the universal gas constant, and T is the temperature in kelvins.

If the pressure exerted on a sample of gas is halved at constant temperature, then the initial pressure P1 becomes P2 = P1/2. Since the number of moles and the temperature are constant, we can use the formula PV = nRT to find that the initial volume V1 is twice the final volume V2, or V1 = 2V2.

Next, if the temperature of the gas in kelvins is doubled at constant pressure, then the final temperature T2 becomes T1 x 2. Since the number of moles and the pressure are constant, we can use the formula PV = nRT to find that the final volume V2 is also doubled, or V2 = V1/2.

Substituting the value of V1 from the first step, we get V2 = (1/2) x 2V2 = V2. Therefore, the final volume of the gas is the same as the initial volume, which is V2 = V1/2.

In conclusion, the answer is that the final volume of the gas is one-half the initial volume.

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According to the information, we can infer that the correct sentence is: A mosquito flying with a velocity of 5 m/s (option C).

Momentum is a term that refers to a physical property of moving objects. Momentum is a measure of the amount of motion a moving object has and is related to the mass and velocity of the object.

Based on the above, we can infer that the correct option is correct because the fly would have more momentum than the other objects because its mass is less W

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Answer:  140,000

Explanation:

You simply add both of the momentums.

(\(m_{1}\) x \(v_{1}\)) + (\(m_{2}\) x \(v_{2}\))

\(m_{1}\) = 4,000kg

\(v_{1}\) = 25m/s

\(m_{2}\) = 2,000kg

\(v_{2}\) = 20m/s

(4,000kg x 25m/s)  + (2,000kg x 20m/s)

               (100,000) + (40,000)   =   140,000

you can use formula:

\(\tt N_t=(\dfrac{1}{2}^n)N_o\\\\N_t=final\:mass\\\\N_t=initial\:mass\\\\n=number\:of\:half-life\)

Input the value:

\(15=120(\dfrac{1}{2}^n)\\\\\dfrac{15}{120}=\dfrac{1}{2}^n\\\\\dfrac{1}{8}=\dfrac{1}{2}^n\\\\\dfrac{1}{2}^3=\dfrac{1}{2}^n\Rightarrow \boxed{\bold{n=3\:half-lives}} \)

Answer:

The answer is B.

Explanation:

Since they are made up of soft tissues, they decompose become they become fossils.

Answer:

60

Explanation:

(hint: speed = distance/time)

The average speed for this trip will be \(\rm 60 mile\ hr^{-1}\). The ratio of the total distance and time is average velocity.

The total distance traveled by an object divided by the total time taken is the average speed.

The average speed of an object indicates the pace at which it will traverse a distance. The metric unit of speed is the meter per second.

The given data in the problem is;

t is the time taken = 5 hour

d is the distance tyravelled=300 miles

The average velocity is found as;

\(\rm v_{avg} = \frac{d_{total}}{t{total}} \\\\\ \rm v_{avg} = \frac{300}{5} \\\\ \rm v_{avg} = 60 mile\ hr^{-1}\)

Hence the average speed for this trip will be \(\rm 60 mile\ hr^{-1}\)

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Given:

The applied force is F = 23 N

The mass of the object is m = 7 kg

The object moves with a constant velocity of v = 6.1 m/s

The acceleration due to gravity is g = 10 m/s^2

Required: The coefficient of friction between the object and the surface.

Explanation:

The object moves at a constant velocity, so the acceleration will be zero.

The equation of motion can be written as

So, the applied force will be equal to the frictional force.

The coefficient of friction can be calculated as

On substituting the values, the coefficient of friction will be

Thus, the coefficient of friction is 0.33

Final Answer: The coefficient of friction between the object and the surface is 0.33.

kinetic energy 8.0 s later will be 11.35 joules

Given:

inertia,I=0.034kgm²

torque,τ=0.11nm

time,t=8.0s

To find:

kinetic energy,KE

we can find the kinetic energy by using

\(k = \frac{1}{2} iω {}^{2} \)

so firstly we will find ω by finding α

α=τ/I

α=0.11/0.34

=3.23

then we find ω

ω=α×t

=3.23×8

=25.84

\(k = \frac{1}{2}iω {}^{2} \)

k=1/2×0.34×(25.84)2

=1/2×22.70

k=11.35

so kinetic energy is 11.35 joules

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Answer:

Acceleration is the rate of change of velocity with time.its system international unit is meters per second square.

I hope this helps

Answer:

What is an electromagnetic wave

Explanation:

Electromagnetic radiation is also more commonly known as light, light travels in waves- and light travels at the same speed as electromagnetic waves. :)

Answer:

Scientific laws are facts that describe observed reoccurring natural events.

Explanation:

Scientific laws are explanations for the behavior of the natural world. Scientific theories are explanations for scientific laws.

The resistance of two resistors are R1 is and R2 is 1.4ohms and 6.2ohms respectively where R1 is smaller and R2 is larger resistance.

Given the voltage of battery (V) = 12V

Let the resistance of smaller resistor = R1

Let the resistance of larger resistor = R2

The current in circuit when connected in parallel (Is) = 1.57A

Ohms law states that V = IR where V is voltage R is resistance and I is current.

When resistors are connected in series Rs = R1 + R2

V =Is(R1 + R2)

R1 + R2 = 12/1.57 = 7.6

R1 = 7.6 - R2

When resistors are connected in parallel 1/Rp = 1/R1 + 1/R2

then Rp = R1R2/R1 + R2

The current in parallel circuit (Ip) = 10.5A

V = Ip(R1R2/R1+R2)

R1R2 = 12 x (7.6) / 10.5 = 8.68

(7.6 - R2)R2 = 8.68

R2^2-7.6R2+8.68 = 0

R2 = 6.2ohm

R1 = 7.6 - 6.2 = 1.4ohms

Hence the smaller resistance is 1.4ohms and larger resistance is 6.2ohms.

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I think there was momentum conserved

Explanation: I took the test

Answer:

60Nm

Explanation:

Given data

Applied force= 200N

length of spanner= 30cm to meter

= 30/100= 0.3m

We know that the formula for the moment is

P=Fl

that is

P= force * length

P= 200*0.3

P= 60Nm

Hence the moment is 60Nm

Answer:

where is the problem u need help with

Explanation:

(: pls mark brainliest

Answer: math is an area of knowledge that includes the study of such topics. as numbers and formulas related structures, algebra and geometry also calculus and analysis

Explanation:

:

ultraviolet B

Explanation:

Answer:

kinetic energy = 1/2 x mass x velocty^2

1/2(12)(10^2)

600 N

hope that answers your question

Explanation: