If an electron orbits a proton with an orbital radius (r), how fast is it moving?

Answer:

please help

Explanation:

0.033 seconds time would it take an absorbing surface to absorb 500 J of energy from electromagnetic radiation.

Radiation that travels in waves and has both electric and magnetic fields. It is derived from both natural and man-made sources. The power of electromagnetic radiation can range from low to high. It consists of x-rays, gamma rays, infrared, visible, and ultraviolet light as well as radio waves and microwaves.

Due to the periodic alteration of the electric or magnetic field, electromagnetic radiation or waves are produced. Different electromagnetic spectrum wavelengths are created depending on how this periodic shift takes place and the power generated.

Given that,

Surface area (A) = 10 m²

Energy absorb (E) = 500 J

Intensity (I) = 1.5 × 10³ w/m²

As we know,

I = ( E / A ) × t

1/t = (I × A) ÷ E

1/t = ( 1.5 × 10³ × 10 ) ÷ 500

t = 0.033 sec.

So, time taken is 0.033 sec to absorb surface energy.

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Answer:

I hope it helped U......

The mass and energy of the wood before burning would be equal to the energy and matter of the ash, soot, heat and light after burning.

The law of conservation of energy states that energy can neither be created nor destroyed but can be transformed from one form to another.

While burning of wood, the chemical energy in the wood is released as heat because of the chemical reaction of wood and oxygen.

This type of chemical reaction is called combustion and it requires oxygen. Combustion converts the stored chemical energy in the wood into heat and light energy.

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The time taken for the bicycle to travel the given distance at the given velocity is 6.667 seconds.

Given the data in the question:

Distance travelled by the bicycle; \(S = 100m\)

Speed or velocity of the bicycle; \(v = 15m/s\)

Time taken for the bicycle to travel the given distance; \(t = ?\)

We know that speed is the rate of change of position of an object with respect to time.

That is to say, Speed = Distance / Time

Hence, Time = Distance / Speed

\(t = \frac{S}{v}\)

So, to get our time "t", we simply substitute in our given values

\(t = \frac{100m}{15m/s}\)

\(t = 6.667 s\)

Therefore, the time taken for the bicycle to travel the given distance at the given velocity is 6.667 seconds.

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A strong magnetic field prevented the creation of charged particles or ions.

This is because the magnetic field exerts a force on charged particles, causing them to move in a circular path around the field lines, which in turn prevents them from combining and forming new particles or ions.

A strong magnetic field can have various effects on the physical and chemical processes occurring within a system, and can sometimes prevent the creation or modification of certain materials or structures.

One example of this is in the field of material science and engineering, where magnetic fields can be used to control the growth and alignment of crystalline structures in materials.

In some cases, a strong magnetic field can prevent the creation of certain materials altogether.

For example, when attempting to produce graphene using chemical vapor deposition (CVD), a strong magnetic field can disrupt the growth process and prevent the formation of the desired structure.

This is because the magnetic field can affect the movement and orientation of the precursor molecules, leading to a non-uniform growth pattern and the formation of defects in the graphene lattice.

Similarly, in certain chemical reactions, a strong magnetic field can alter the rate and outcome of the reaction, making it difficult or impossible to create certain products.

This is because the magnetic field can affect the spin states of the reacting molecules and alter their reactivity and selectivity.

Overall, a strong magnetic field can have significant and sometimes unpredictable effects on the creation and modification of materials and chemicals, and must be carefully considered and controlled in many research and industrial processes.

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Answer:

C i guess

Explanation:

took it the test

The magnitude of this vector:

18.4 mi-28.7 mj is 34.09m

Given:

vector is

18.4 mi-28.7 mj

Magnitude =\(\sqrt{18.4^2+28.7^2}=34.09\)

This magnitude of a vector formula summarizes the distinct vector measures along the x-axis, y-axis, and z-axis. It is represented by the symbol |v|. A vector's magnitude is either a positive number or zero, and it can never be negative. Let us finally understand the magnitude of a vector formula by considering a few solved cases.

A vector's magnitude is equal to its length. The magnitude of the vector an is indicated by the symbol a. For further information on vector magnitude, see the introduction to vectors.

This article deduces formulas for the magnitude of vectors in two and three dimensions in terms of their coordinates. The magnitude formula for a two-dimensional vector a=(a1,a2)

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Answer:

34.09178

Explanation:

This is the correct answer for Acellus

f_3 = 3v / 2L, is the third lowest standing wave frequency of the tube.

A standing wave, also known as a stationary wave, is a type of wave that appears to be stationary in space and does not propagate like a typical wave. Standing waves are formed when two waves of equal frequency and opposite direction interfere with each other and create a pattern of points of maximum and minimum amplitude, called nodes and antinodes, that do not move with time. The frequency of a standing wave is the number of complete waves that pass a given point in a given unit of time, typically measured in hertz (Hz).

In acoustics, standing waves can occur in closed tubes or containers, such as organ pipes or wine glasses, when the waves reflect off the end of the container and interfere with each other to create the standing wave pattern. The frequency of a standing wave in a tube depends on the speed of sound in the medium filling the tube and the length of the tube.

The formula for the frequency of a standing wave in a tube closed at one end is given by:

f_n = nv / 2L

where n is the mode number (n = 1, 2, 3, ...), v is the speed of sound in the medium filling the tube, and L is the length of the tube.

Since the next higher standing wave frequency is 300 Hz more, we can write two equations for the frequency of the nth and (n+1)Th. modes:

f_n = nv / 2L

f_{n+1} = (n+1)v / 2L + 300 Hz

Dividing the two equations gives:

f_{n+1} / f_n = (n+1) / n + 300 / (nv/2L)

Rearranging and using the fact that f_{n+1} / f_n = (n+1) / n, we can solve for n:

n = (300L / v)

For the 3rd lowest standing wave frequency, n = 3, so we can substitute this back into the first equation to get:

f_3 = 3v / 2L

Note that the speed of sound and the length of the tube are not given, so we cannot calculate the exact frequency of the 3rd mode.

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The baseball will reach its maximum height after approximately 6.11 seconds using equations of motion where velocity is given

When a baseball is thrown straight up with an initial velocity of 60 m/s, it will eventually reach a maximum height before falling back down due to gravity. To determine how many seconds later the baseball will reach its maximum height, we need to use the equations of motion.

The equation we can use to find the time taken for the baseball to reach its maximum height is:

t = Vf / g

where t is the time taken, Vf is the final velocity (which is zero at the maximum height), and g is the acceleration due to gravity, which is approximately \(9.81 m/s^2\).

Substituting:

t = 60 / 9.81

t ≈ 6.11 seconds

Therefore, the baseball will reach its maximum height after approximately 6.11 seconds. After this point, the baseball will begin to fall back down to the ground due to the force of gravity, with its velocity increasing at a rate of \(9.81 m/s^2\)

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The substance with meting point of 240 °C and boiling point of 300  °C is hard plastics. Any volume of alcohol has an 78 °C. Candle wax have higher melting point than water.

Boiling point of a substance is the temperature at which the substance is converts from liquid state to vapor state at which the the vapor pressure equal to the atmospheric pressure.

It is clear from the table that, substance with meting point of 240 °C and boiling point of 300  °C is hard plastics. Boiling point of a substance does not change with change in volume.

Hence, any volume of alcohol has an 78 °C. Candle wax have higher melting point than water.

Oxygen and nitrogen can be differentiated based on their densities and mass.

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Answer:

the answer is at the BOTTOM OF THEIR QUESTION

Explanation:

IT IS CORRECT BTW

The total kinetic energy before the collision is equal to the total kinetic energy after the collision.

When a car and a truck collide and stick together to form a single, combined vehicle, it is referred to as a car-plus-truck system. When two bodies are moving in the same direction and collide, the final velocity of the resulting body is equal to the sum of the two initial velocities.The car-plus-truck system's velocity would be lower than it would be if the truck wasn't moving. This is due to the fact that the car and the truck now have a combined mass, which means that they have more kinetic energy to overcome. Therefore, when the truck has an initial velocity moving in the same direction as the car, the final velocity of the car-plus-truck system decreases.

Consider two objects that are in motion. These objects can be moving in the same direction or opposite directions. When they collide with one another, the final velocity of the system is determined by the combined mass of the objects and their initial velocities. If the two objects are moving in the same direction, their final velocity will be the sum of their initial velocities. In the case of a car and truck system, the final velocity of the combined mass would decrease if the truck has some initial velocity moving in the same direction as the car.When two objects collide, their kinetic energy is transferred between them. The total kinetic energy before the collision is equal to the total kinetic energy after the collision. In the case of a car-plus-truck system, if the truck has some initial velocity moving in the same direction as the car, the combined mass of the car and truck system will be higher. This results in a higher kinetic energy before the collision. Since the total kinetic energy after the collision is equal to the total kinetic energy before the collision, the final velocity of the car-plus-truck system decreases when the truck has some initial velocity moving in the same direction as the car.

In conclusion, when the truck has an initial velocity moving in the same direction as the car, the final velocity of the car-plus-truck system decreases. The final velocity is dependent on the combined mass of the system and the initial velocities of the objects. When two objects collide, their kinetic energy is transferred between them, resulting in a combined mass and kinetic energy that is higher than the initial values. The total kinetic energy before the collision is equal to the total kinetic energy after the collision.

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Answer:

Explanation:

Answer:

There was no anwser

Explanation:

because dylan did not anwser

Answer:

1.A

2 .B

3 A

Explanation:

1.A eccentric excercises works the arms

2.B- if a condition runs in her family there are possibilities that she'll get it because it runs in the genes of her family

The Fourier transform of the original image along a line with orientation θ = 45 degrees and 90 degrees are F{f(x, y) cos θx + sin θy} and F{f(x, y)}, respectively.

(a)When the tissue slice being imaged by a parallel beam x-ray CT scanner is f(x, y) = rect(x/3, y+1/2) + rect(x, y), and the detector is a point detector, the projection g(l, θ) as a function of l, for θ = 0, 45, 90, and 135 degrees, respectively can be sketched as follows. For θ = 0 degrees, the projection is shown below.  

For θ = 45 degrees, the projection is shown below.  For θ = 90 degrees, the projection is shown below.  

For θ = 135 degrees, the projection is shown below.  

(b) When the back-projection is carried out from both 0 and 90 degree projections and normalized using the dimension of the imaged region as indicated on the figure, the image obtained can be sketched as follows.  

(c) If the detector is an area detector with a width of 0.1 cm, the projected function for θ = 0 will be obtained by convolving the function with a rectangular pulse of width 0.1 cm as shown below.  

(d) The Fourier transform of the original image along a line with orientation θ = 45 degrees is shown below.  The Fourier transform of the original image along a line with orientation θ = 90 degrees is shown below.  

Therefore, the Fourier transform of the original image along a line with orientation θ = 45 degrees and 90 degrees are F{f(x, y) cos θx + sin θy} and F{f(x, y)}, respectively.

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The heat must be provided at a rate of 1710.14 horsepower. This engine will exhaust heat at a rate of 1457.14 horsepower.

(a) To find the rate at which we must provide heat to this engine, we need to use the formula for efficiency: Efficiency = Work output / Heat input. Rearranging the formula, we get: Heat input = Work output / Efficiency. Plugging in the given values, we get: Heat input = 253 horsepower / 0.148 = 1710.14 horsepower. Therefore, we must provide heat to this engine at a rate of 1710.14 horsepower.

(b) To find the rate at which this engine will exhaust heat, we need to use the formula: Heat exhausted = Heat input - Work output. Plugging in the given values, we get: Heat exhausted = 1710.14 horsepower - 253 horsepower = 1457.14 horsepower. Therefore, this engine will exhaust heat at a rate of 1457.14 horsepower.

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The magnetic dipole moment of the bar magnet is approximately 0.038 A*m^2.

To calculate the magnetic dipole moment of the bar magnet, we can use the equation: μ = τ / (B sinθ)

where μ is the magnetic dipole moment, τ is the torque experienced by the magnet, B is the magnitude of the magnetic field, and θ is the angle between the magnetic field and the axis of the magnet.

Substituting the given values, we get:

\(μ = (1.70* 10^-2 N*m) / (5.00*10^-2 T * sin45°)\)

μ ≈ 0.038 A*m^2

Note that the units of magnetic dipole moment are Am^2 or J/T, which are equivalent. The units of torque are Nm, and the units of magnetic field are T, as given in the problem.

Therefore, the magnetic dipole moment of the bar magnet is approximately 0.038 A*m^2.

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Answer:

Hydrogen.

Hydrogen can be considered to be in Group 1 or Group 17 because it has properties similar to both groups. Hydrogen can participate in both ionic and covalent bonding. When participating in covalent bonding, hydrogen only needs two electrons to have a full valence shell.

Explanation:

A bored kid willing to help,

as always hope you're having a splendiferous day.

The velocity of the trolley system with the block in it is 1.33 m/s.

Weight of the block, W = 30 N

Mass of the block, m = W/g

m = 30/10 = 3 kg

Mass of the trolley, M = 6 kg

Initial velocity of the trolley, u = 2 m/s

According to law of conservation of momentum,

In an isolated system, when two objects collide, the combined momentum before and after the collision is constant. Due to the fact that the momentum gained by one object equals the momentum lost by another, this occurs.

So, the momentum of the trolley system before and after dropping the block to it are equal.

Mu = (M + m)v

Therefore, the velocity of the trolley system with the block in it,

v = Mu/(M + m)

v = 6 x 2/(6 + 3)

v = 12/9

v = 1.33 m/s

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Answer:

100

Explanation:

cause power equal to work over time

Answer:

T_finalmix = 45 [°C].

Explanation:

In order to solve this problem, a thermal balance must be performed, where the heat is transferred from water with the highest temperature, to the water with the lowest temperature, so the final temperature of the mix must be equal once the thermal balance is achieved.

\(Q_{water}=Q_{methanol}\)

where:

\(Q_{water}=m_{water}*Cp_{water}*(T_{waterinitial}-T_{final})\)

mwater = mass of the water = 300 [g] = 0.3 [kg]

Cp_water = specific heat of the water = 4180 [J/kg*°C]

T_waterinitial = initial temperature of the water = 80 [°C]

T_finalmix = final temperature of the mix [°C]

\(Q_{water}=m_{water}*Cp_{water}*(T_{final}-T_{water})\)

Now replacing:

\(0.3*4180*(80-T_{final})=0.3*4180*(T_{final}-10)\\100320-1254*T_{final}=1254*T_{final}-12540\\112860=2508*T_{final}\\T_{final}=45[C]\)

The final temperature of the mixture is 45 °C

Heat lost by warm water = Heat gained by cold water

Qᵥᵥ = Q꜀

MᵥᵥC(Tᵥᵥ – Tₑ) = M꜀C(Tₑ – T꜀)

0.3 × 4180 × (80 – Tₑ) = 0.3 × 4180 × (Tₑ – 10)

1254 (80 – Tₑ) = 1254(Tₑ – 10)

Clear bracket

100320 – 1254Tₑ = 1254Tₑ – 12540

Collect like terms

100320 + 12540 = 1254Tₑ + 1254Tₑ

112860 = 2508Tₑ

Divide both side by 2508

Tₑ = 112860 / 2508

Tₑ = 45 °C

Thus, the final temperature of the mixture is 45 °C

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Answer:

Δ M V (change in momentum) = F Δt

The change in momentum (hence the change in velocity) is proportional

to the time that is applied

Answer:

v = 10 m/s

Explanation:

We have,

Our initial velocity is 20 m/s

Our acceleration, \(a=-5\ m/s^2\)

It is required to find the velocity after 2 seconds. It is a concept based on equation of kinematics. Using first equation:

\(v=u+at\)

Plugging all the known values

\(v=20+(-5)(2)\\\\v=10\ m/s\)

So, our final velocity is 10 m/s.