The kinetic energy of each ejected electron is 3.31 x 10⁻⁴² J/electron, and its velocity is 8.51 x 10³ m/s.
What is work function?Minimum thermodynamic work needed to remove electron from solid to the point in vacuum immediately outside the solid surface is called work function.
E = hf
hc/λ = hf + Φ
K.E. = hf - Φ
E is energy of a photon, h is Planck's constant, f is frequency of the photon, c is speed of light, λ is wavelength of the photon, Φ is work function, K.E. is kinetic energy of ejected electron.
E = hf = Φ + hc/λ
hf = Φ + hc/λ
f = (Φ + hc/λ) / h
E = hc/λ = h((Φ + hc/λ) / h) = Φh/h + hc/λh
E = Φ + hc/λ
Given, Φ = 483.4 kJ/mol photons = (483.4 kJ/mol photons) / (6.022 x 10²³ photons/mol) = 8.03 x 10⁻¹⁹ J/photon
c = 3.00 x 10⁸ m/s h = 6.626 x 10⁻³⁴ J·s λ = 225.0 nm = 225.0 x 10⁻⁹ m
So, E = Φ + hc/λ = (8.03 x 10⁻¹⁹ J/photon) + (6.626 x 10⁻³⁴ J·s x 3.00 x 10⁸ m/s) / (225.0 x 10⁻⁹ m) = 2.79 x 10⁻¹⁸ J/photon
K.E. = hf - Φ = E - Φ
K.E. = (2.79 x 10⁻¹⁸ J/photon) - (8.03 x 10⁻¹⁹ J/photon) = 1.99 x 10⁻¹⁸ J/photon
K.E. = (1.99 x 10⁻¹⁸ J/photon) / (6.022 x 10²³ photons/mol) = 3.31 x 10⁻⁴² J/electron
K.E. = 1/2 mv²
m = 9.109 x 10⁻³¹ kg
K.E. = 3.31 x 10⁻⁴² J/electron
3.31 x 10⁻⁴² J/electron = 1/2 (9.109 x 10⁻³¹ kg) v²
v² = (2 x 3.31 x 10⁻⁴² J/electron) / (9.109 x 10⁻³¹ kg)
v^2 = 7.26 x 10⁷ m²/s²
v = √(7.26 x 10⁷m²/s²) = 8.51 x 10³ m/s
Therefore, the kinetic energy of each ejected electron is 3.31 x 10⁻⁴²J/electron, and its velocity is 8.51 x 10³ m/s.
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How do the physical and chemical properties contribute to the function of the synthetic products from gold
The physical properties of gold, such as its malleability, ductility, and electrical/thermal conductivity, are important for making synthetic products from gold.
What is physical properties?Physical properties are characteristics of a material that can be observed without changing the composition of the material. Examples of physical properties include color, density, hardness, electrical conductivity, melting point, boiling point, and solubility.
From a chemical perspective, gold is a relatively inert element, meaning it is resistant to oxidation and other chemical reactions. This makes it ideal for use in applications where it may be exposed to harsh environments or corrosive materials, such as medical implants and aerospace components. Additionally, gold's unique properties make it suitable for use in catalytic reactions, meaning it can speed up chemical reactions without itself being consumed or affected. This is used in a variety of industries, such as the production of pharmaceuticals, food additives, and polymers.
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three parallel plate capacitors are shown below. the distance between their plates is the same in all three cases. for which capacitor does the electric field between the plates have the largest magnitude?
From the given diagram, we can see that the middle capacitor has the smallest capacitance since it has the smallest plate area. Therefore, the middle capacitor will have the largest electric field.
The electric field between the plates of a parallel plate capacitor is given by E = V/d, where V is the potential difference between the plates and d is the distance between the plates.
Since the distance between the plates is the same for all three capacitors, the electric field between the plates will be proportional to the potential difference V.
The potential difference V for a capacitor is given by V = Q/C, where Q is the charge on the plates and C is the capacitance of the capacitor.
Therefore, the capacitor with the largest electric field will be the one with the largest charge or the smallest capacitance.
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Is temperature the measure of the average kinetic energy of a substance?
Yes, The average kinetic energy of the particles in a material is measured by temperature. It is a typical particle's kinetic energy.
The average kinetic energy of the particles in a material is measured by temperature. The overall kinetic energy of the particles in a material is measured by thermal energy. The more the mobility of particles, the higher the temperature and thermal energy of a material. Kinetic energy is the energy held by a moving item. A substance's temperature is directly proportional to the average kinetic energy of its particles. The kinetic energy of the particles is 0 at absolute zero. A substance's temperature is proportional to its kinetic energy. Since kinetic energy is the energy that a material has as a result of its molecules moving, when a substance absorbs heat, its molecules move quicker, increasing the substance's kinetic energy.
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How are Van Allen belts formed?
O High-energy particles from the Sun get trapped in Earth's magnetic field
O Metals in Earth's core sink and rise, producing a circular movement of the metals.
O Srticles in solar wind travel along lines of Earth's magnetic field and collide with gas atoms.
O Material from the surface of the Sun erupts and forms a loop due to the Sun's magnetic field.
The Van Allen belt is formed when High-energy particles from the Sun get trapped in Earth's magnetic field
How are Van Allen belts formed?The Van Allen belts are fields in outer space caused by Earth's magnetism. Magnetic striping is evidence of seafloor unfurling. The inner Van Allen belt is located usually between 6000 and 12 000 km (1 - 2 Earth radii [RE]) above Earth's surface, although it formed dips much near the South Atlantic Ocean. The outer radiation belt covers altitudes of roughly 25 000 to 45 000 km (4 to 7 RE).
Space scientist James Van Allen and his team at the University of Iowa were the first to locate the radiation belts, now also mention to as "The Van Allen Belts."
So we can conclude that The Van Allen belts were first discovered in 1958
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High-energy particles from the Sun get trapped in Earth's magnetic field.
option A.
How are Van Allen belts formed?The Van Allen belts are formed due to the interaction of charged particles from the solar wind with Earth's magnetic field. High-energy particles from the Sun get trapped in Earth's magnetic field, creating two belts of charged particles that encircle the planet.
The inner belt is made up of highly energetic protons, while the outer belt consists of energetic electrons. The charged particles are trapped by the magnetic field and follow magnetic field lines that are shaped like a torus (doughnut) around the Earth. This creates the Van Allen belts, which can extend several thousand kilometers into space and protect the Earth from the harmful effects of charged particles in the solar wind.
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the rest energy of a proton is approximately 938.27mev. if its kinetic energy is also 938.27 mev, find (a) its momentum, and (b) its speed.
(a) Proton has a momentum of 1305.7 MeV/c, and (b) Its speed is 0.99997 the speed of light.
The total energy of a particle is given by the sum of its rest energy and kinetic energy, as described by the equation:
E = mc² + (1/2)mv²
here,
E is total energy,
m is mass of the particle,
c is speed of light, and
v is velocity of the particle.
(a) To find the momentum of the proton:-
E² = (mc²)² + (pc)²
here,
p is momentum of the particle.
Making this:-
p = √[E² - (mc²)²] / c
Putting in values for rest energy and kinetic energy of proton:-
=> E
= 938.27 MeV + 938.27 MeV
= 1876.54 MeV
=> m
= 1.007276 u * (931.5 MeV/c²/u)
= 938.03 MeV/c²
=> p
= √[(1876.54 MeV)² - (938.03 MeV/c²)²] / c
= 1305.7 MeV/c
Therefore, the momentum of the proton is 1305.7 MeV/c.
(b) To find the speed of the proton, we can rearrange the equation for the total energy:-
v = c * √[1 - (mc² / E)²]
Putting values for rest energy and kinetic energy of proton:-
=> v
= c * √[1 - (938.03 MeV/c² / 938.27 MeV)²]
= 0.99997c
Therefore, the speed of the proton is 0.99997 times the speed of light.
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observe the velocities of the waves on graph fig,ure 2.4. which one travels faster? group of answer choices
The P wave, or main wave, is the initial type of body wave. It is the kind of seismic wave that moves most quickly and shows up first at a seismic station. Both fluids like water and the liquid layers of the Earth can conduct P waves, as can solidly rock.
What are the P waves and S wave?Due to the way P-waves distort the material they are passing through and the restoring forces of that material, P-waves will always move more quickly than S-waves. It's crucial to comprehend that S-waves cannot pass through liquids.
P waves leave the earthquake first and go the furthest. The oscillation of rock occurs in shear or S waves that are parallel to the direction of wave propagations waves always follow P waves in a rock environment and normally flow at a speed of about 60% that of the latter.
Therefore, P Waves ravels faster.
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an important feature of atoms is that they __________.
"An important feature of atoms is that they have wave properties."
Protons, electrons, neutrons, and atoms all exhibit wave-like behaviour. In other words, matter has both wave-like and particle-like characteristics, just like light.
Both particle and wave characteristics apply to electrons. The electrons in an atom oscillate around the centre as standing waves.
When a particle's mass is low, it exhibits wave characteristics. Again, there is no boundary; all particles possess wave properties, but it is only feasible to observe them when the mass of the particle is sufficiently low.
Research has shown that atomic particles behave exactly like waves. We observe a full diffraction pattern, just as if we had been using waves, when we fire electrons at one side of a screen with two closely spaced holes and measure the distribution of electrons on the opposite side.
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A 65 kg teacher (including the parachute) is skydiving. As the parachute opens, the system experiences 1400 N air resistance (drag).
The force of gravity on the parachute/teacher system is ___ down. The net force is ___.
Choices:
637 N
65kg
1400 N
1400 N up
763 N down
763 N up
Gravity is a fundamental force of nature that exists between any two objects that have mass. It is an attractive force that pulls objects toward each other. The net force on the parachute/teacher system is 763 N up.
What is Gravity?The force of gravity is directly proportional to the masses of the objects and inversely proportional to the distance between them. The more massive the objects and the closer they are, the stronger the force of gravity between them.
The force of gravity on the parachute/teacher system is 637 N down.
[tex]F_gravity = m \times g[/tex]
Where m is the mass of the teacher and parachute system, and g is the acceleration due to gravity, which is approximately 9.8 m/s^2 near the surface of the Earth.
[tex]F_gravity = 65 kg \times 9.8 m/s^2 = 637 N down[/tex]
The net force is the vector sum of the forces acting on the system. In this case, there are two forces acting on the system: the force of gravity (637 N down) and the air resistance (1400 N up).
The net force is given by:
[tex]F_net = F_drag - F_gravity[/tex]
where [tex]F_drag[/tex] The air resistance [tex](1400 N[/tex]Up).
So,
[tex]F_net = 1400 N[/tex] [tex]up – 637 N[/tex] down = [tex]763 N[/tex]up
Therefore, the net force on the parachute/teacher system is [tex]763 N[/tex] Up.
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which is a good description of kinetic energy?(1 point) responses stored energy stored energy energy from the sun energy from the sun conserved energy conserved energy energy of motion
The force that drives motion is kinetic energy. It is the energy a thing possesses as a result of movement. It is the energy that a moving item possesses as a result of its direction and speed.
What is kinetic energy?
Kinetic energy is the force that propels motion. It's the energy that an object has because it's moving. Kinetic energy can be exchanged between objects or transformed into other types of energy, such as heat or potential energy. The kinetic energy is affected by the object's mass and speed. The kinetic energy of an object increases with speed.
From the mobility of atomic particles to the movement of things in space, kinetic energy is a crucial component in many branches of physics.
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the earth has a much larger mass than the moon. how many moons would it take to equal the mass of earth?
Answer: 81 1/2 moons would be needed to equal the amount of mass of Earth
Explanation:
What kind of motion does a torque tend to impart to an object?
A torque tends to impart rotational motion to an object and is responsible for keeping the object in rotation.
Torque in rotational motion is the same as force in linear motion. It is the main factor that maintains an object's rotation. An object rotates at an acceleration inversely proportional to its moment of inertia when a torque is applied to it. Torque is mathematically determined by:
Γ= Ia
where, I is the moment of inertia and a is the acceleration with which the object rotates. Torque has both magnitude and direction and is, thus, a vector quantity. Torque is expressed in Newton metre or Nm.
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two similar wooden blocks are tied one behind the other and pulled across a level surface. friction is not negligible. the force required to pull them at constant speed is f. if one block is stacked upon the other, how would the new force required to pull them at constant speed compare to f?
If the force required to pull the two separate blocks at constant speed is F, then the force required to pull the two stacked blocks at a constant speed will be 2F.
When two blocks are tied together and pulled across a level surface with friction, the force required to pull them at constant speed is determined by the frictional force between the blocks and the surface. Let's call this force F.
When one block is stacked on top of the other, the total mass of the two blocks is now doubled, but the contact area between the blocks and the surface remains the same. As a result, the frictional force between the blocks and the surface will also double, since it is proportional to the normal force (the force perpendicular to the surface), which is equal to the weight of the blocks. Therefore, the force required to pull the two stacked blocks at a constant speed will be twice the original force F required to pull the two separate blocks.
In other words, if the force required to pull the two separate blocks at constant speed is F, then the force required to pull the two stacked blocks at a constant speed will be 2F.
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a student is playing with a magnetic compass near a bar magnet. at a range of 10 cm, they notice that the compass needle is pulled slightly towards the magnet. what would they see if the compass was kept at the same distance, but moved to the other end of the magnet?
Needle will be pushed away form the magnet if the compass was kept at the same distance, but moved to the other end of the magnet
When the magnetic field of the bar magnet intercepts the magnetic field of the compass needle, the compass needle deflects because it encounters a distinct magnetic field.
Needle of the magnetic compass is deflected when a bar magnet is brought up to a magnetic compass. As the north pole of the magnet is brought close to the compass, the needle's south side is drawn to it. Needle will be pushed away form the magnet if the compass was kept at the same distance, but moved to the other end of the magnet.
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A baggage handler drops your 10 kg suitcase onto a conveyor belt running at 1.5 m/s. The materials are such that s = 0.50 and k = 0.20. How far is your suitcase dragged before it is riding smoothly on the belt?
The suitcase is dragged approximately 0.58 meters before it is riding smoothly on the conveyor belt.
What is drag force?Drag force is a force that resists the motion of an object through a fluid (such as air or water) due to the frictional forces between the object's surface and the fluid.
Here,
The initial velocity of the suitcase is zero since it was dropped from rest. The suitcase will accelerate until the kinetic friction force between it and the conveyor belt matches the force of gravity acting on it, resulting in a constant velocity. We can use the following equation to find the distance traveled by the suitcase until it reaches a constant velocity:
[tex]d = (v_f^2 - v_i^2) / (2 * \mu* g)[/tex]
We know the final velocity of the suitcase is 1.5 m/s, the coefficient of kinetic friction is 0.20, and g is 9.81 m/s^2. Substituting these values into the equation, we get:
[tex]d = (1.5^2 - 0) / (2 * 0.20 * 9.81)[/tex]
d ≈ 0.58 meters
Therefore, the suitcase is dragged approximately 0.58 meters before it is riding smoothly on the conveyor belt.
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What are the positive and negative impacts of technology on the environment?
Answer:
Explanation:
Technology has both positive and negative impacts on the environment. Here are some examples of each:
Positive impacts:
Increased energy efficiency: Advances in technology have led to the development of more energy-efficient appliances, vehicles, and industrial processes, reducing energy consumption and greenhouse gas emissions.
Renewable energy: Technology has enabled the development of renewable energy sources such as wind and solar power, reducing our dependence on fossil fuels and reducing the impact of energy production on the environment.
Improved waste management: Technological innovations have improved waste management practices, making it easier to recycle and reduce waste.
Enhanced communication and transportation: Technology has improved communication and transportation, making it easier to access information and resources, reducing the need for travel, and minimizing the environmental impact of transportation.
Negative impacts:
Resource depletion: Technology often requires the extraction and use of natural resources such as minerals, oil, and gas, leading to resource depletion and environmental degradation.
Electronic waste: The increasing use of electronic devices has led to a growing problem of electronic waste, which can contain toxic materials and harm the environment if not disposed of properly.
Climate change: Some technologies, such as fossil fuel-based energy production and transportation, contribute significantly to climate change through the release of greenhouse gases into the atmosphere.
Habitat destruction: The development of technology and infrastructure often requires the destruction of natural habitats, leading to the loss of biodiversity and disruption of ecosystems.
Overall, technology has the potential to have both positive and negative impacts on the environment, and it is important to consider these impacts when developing and using technology in a way that is sustainable and equitable.
distinguish between aerobic and anaerobic respiration write any 3points
in a carnival ride, chairs swing about a vertical axis with a constant angular velocity so the swing rope is inclined at 65o to the vertical as shown. the rope is 40 ft long, the combined weight of the rider and chair is 180 lb, and the weight of the rope may be neglected. determine the tension t in the rope and the linear velocity of the chair and rider.
The tension T in the rope is 163.13lb and the linear velocity of the chair and rider is 36.25ft/s.
Given the vertical angle of inclination (θ) = 65°
The length of the rope (L) = 40ft
The combined weight of rider and chair (W) = 180lb
Let the tension in the rope = T
The linear velocity of the rope = v
Tension in the rope is calculated as:
T = mgsinθ such that W = mg
T = (180lb) x (sin 65°) = 163.13 lb
Linear velocity of the chair and rider (v):
v = (L) x (2πr) / mg = 2πrL/W where r is the radius of circle formed.
r = (40 ft) / (2π) = 6.37 ft
v = (163.13 lb) x (2π x 6.37 ft) / (180 lb) = 36.25 ft/s
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Bonjour est ce que on peux m'aider pour cet exercice de mon dm de physique svp:
Convertir les masses proposées dans l’unité demandée :
3,2 kg = ………………………g =.............................................. mg
150 kg = ……………………….t =...........................................g
257 g = …………………………kg =....................................... t
For both waves on strings and sound waves in tubes,
A. The mode number is independent of the wavelength.
B. A higher mode number means a shorter wavelength.
C. A higher mode number means a longer wavelength.
The correct statement is B.
A higher mode number means a shorter wavelength.
What is Wavelength?
Wavelength is an important characteristic of all types of waves, including electromagnetic waves (such as light and radio waves) and mechanical waves (such as sound waves and water waves). In general, the wavelength of a wave is determined by the source of the wave, the medium through which it travels, and the frequency of the wave.
The correct statement is B. A higher mode number means a shorter wavelength.
In both cases, the mode number refers to the number of segments, or nodes, into which the wave can be divided. The wavelength, on the other hand, refers to the distance between two adjacent peaks or troughs of the wave.
When the mode number increases, the number of segments or nodes in the wave increases, which means that the wavelength must decrease in order to maintain the same frequency of the wave. This is because the total length of the string or tube remains the same, and so the length of each segment must decrease as the number of segments increases. Therefore, a higher mode number corresponds to a shorter wavelength.
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to determine the height of a bridge above the water, a person drops a stone and measures the time it takes for it to hit the water. if the time is 2.3 s, what is the height of the bridge? a) 10 m b) 14 m c) 26 m d) 32 m
the height of a bridge above the water, a person drops a stone and measures the time it takes for it to hit the water. if the time is 2.3 s, 26m is the height of the bridge.
initial velocity u = 0m/s
time taken t = 2.3 s
height of the bridge is H = ut + 1/2 g t²
= 0+ 1/2 *9.8 * ( 2.3 )²
= 25.9 m≅26m
A bridge is a structure that spans a physical obstacle, such as a body of water, a valley, or a road. Bridges are designed to provide a stable and safe passage for people, vehicles, and materials. The design of a bridge depends on the type of obstacle it spans, the traffic it carries, and the environmental conditions in the area. Bridges can be made of various materials, including wood, stone, concrete, and steel. The construction of a bridge requires careful planning, engineering, and execution. Many factors must be considered, such as the load capacity of the bridge, the effects of wind and water on the structure, and the impact on the environment. Bridges play a vital role in transportation, commerce, and tourism.
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A ball of mass 0.5 kg is thrown with kinetic energy of 100 J vertically upward. If air resistance is neglected, find maximum height reached by the ball. (g = 10 m/s²)
Answer:
20 meters
Explanation:
The initial velocity of the ball can be determined using the equation for kinetic energy:
K = (1/2)mv^2
100 J = (1/2) * 0.5 kg * v^2
So, v^2 = 200 J / 0.5 kg = 400 m^2/s^2
The velocity can be determined from the square root:
v = sqrt(400 m^2/s^2) = 20 m/s
Now we can use the velocity to determine the maximum height. The maximum height is reached when the velocity is zero, so we can use the formula for vertical motion under constant acceleration to find the time when this occurs:
v = v0 - gt
0 = 20 m/s - 10 m/s^2 * t
t = 2 s
We can use this time to find the maximum height:
h = v0 * t - (1/2)gt^2
h = 20 m/s * 2 s - (1/2) * 10 m/s^2 * 2 s^2
h = 40 m - 20 m
h = 20 m
So, the maximum height reached by the ball is 20 meters.
an electron is accelerated from rest by a potential difference of 450 v. it then enters a uniform magnetic field of magnitude 170 mt with its velocity perpendicular to the field. calculate the speed of the electron.
The frequency of its circular motion is[tex]2.67 *10^8 Hz[/tex]. This frequency represents the number of complete circles that the electron makes in one second. It is also known as the cyclotron frequency.
To calculate the speed of the electron, we need to use the equations for the motion of a charged particle in a magnetic field.
First, we can calculate the acceleration of the electron due to the potential difference. We know that the potential difference is 450 V, which is also equal to the electron's kinetic energy. Therefore, we can use the equation for kinetic energy:
[tex]KE =\frac{ 1}{2} mv^2[/tex]
where KE is the kinetic energy, m is the mass of the electron, and v is its velocity. We can rearrange this equation to solve for v:
[tex]v = \sqrt(\frac{2KE}{m})[/tex]
We know that KE = eV, where e is the charge of the electron and V is the potential difference, so we can substitute:
[tex]v = \sqrt(\frac{2eV}{m})[/tex]
where e is the elementary charge [tex](-1.602 * 10^{-19 }C)[/tex] and m is the mass of the electron[tex](9.109 *10^{-31} kg)[/tex]. Plugging in the values, we get:
[tex]v = \sqrt\frac{(2*(-1.602 *10^{-19} C)*(450 V)}{(9.109 * 10^{-31} kg)}) \\ = 6.02 x 10^6 m/s[/tex]
This is the initial speed of the electron as it enters the magnetic field.
Next, we need to consider the motion of the electron in the magnetic field. Since the electron's velocity is perpendicular to the magnetic field, it will experience a force that is perpendicular to both its velocity and the magnetic field. This force can be calculated using the equation:
F = qvB
where F is the magnetic force, q is the charge of the electron, v is its velocity, and B is the magnetic field strength.
The magnetic force will cause the electron to move in a circular path with a radius given by the equation:
[tex]r =\frac{ mv }{ (qB)}[/tex]
where r is the radius of the circular path.
Since we know the velocity of the electron and the magnetic field strength, we can calculate the radius of the circular path:
[tex]r = \frac{mv }{ (qB)}[/tex]
[tex]=\frac{ (9.109 * 10^{-31} kg) * (6.02 * 10^{6 }m/s) }{ (1.602 *10^{-19 }C * 0.170 T) }\\\\= 1.18 * 10^{-2} m[/tex]
Finally, we can use the speed of the electron and the radius of its circular path to calculate the frequency of its circular motion:
[tex]f =\frac{v}{ (2\pi r) }\\ = \frac{(6.02 * 10^{6 }m/s) }{ (2\pi * 1.18 * 10^{-2 }m)} \\= 2.67 * 10^{8 }Hz[/tex]
This frequency represents the number of complete circles that the electron makes in one second. It is also known as the cyclotron frequency, and is a useful parameter in many applications involving charged particles in magnetic fields.
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a planet is discovered orbiting a nearby star once every 125 years. if the star is identical to the sun, how could you find the planet distance from its star? if the planet's orbit is a perfect circle, how far from the star is the planet in aus?
A star's distance from Earth measured in astronomical units (AU) must be determined (AU). The distance between Earth and the sun is one AU.
What are the planet's orbit is a perfect circle?Although no planet has an exact circular orbit, the majority of planets have only slightly eccentric orbits. Because of its extremely eccentric orbit, Mercury is an exception.
The orbital form is described by Kepler's First Law. A planet's or a satellite's orbit around the Sun or a planet is not a perfect circle. A "flattened" circle, it is an ellipse. One of the ellipse's foci is the Sun (or the planet's centre).
Therefore, P^2 = a^3 125^2 = a^3 15625 = a^3 a=25. we divide 1 AU by the star's distance from Earth in order to determine its distance from the planet. The response in this instance is 0.000302 AU.
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two oppositely-charged plates are set up in the lab, where the positive plate is placed north of the other plate. in which direction would the electric field lines between the plates be pointing of a diagram was drawn?
Answer:
Explanation:
a 2 kg mass has 40 j of potential energy with respect to the ground. approximately how high is it above the ground?
The ground is chosen as a base for potential gravitational energy for the same reason. Compared to the gravitational potential at the center of the planet, the truth is that you even have gravitational potential energy.
What potential energy with respect to the ground?Ep = mgh. An object has the same amount of stored gravitational potential energy as the work required to raise it. The gravitational potential energy (PEg) that is added to or obtained by the object-Earth system is how we describe this.
The force acting on the two objects affects the formula for potential energy. P.E. = mgh is the formula for gravitational force, where m is mass in kilograms, g is acceleration due to gravity (9.8 m/s2 at the earth's surface), and h is height in meters.
M= 2kg
P.E = 40j
g=10N
H=?
Using formula [tex]P.E. = mgh[/tex]
40 = 2 * 10* H
Therefore, approximately 2 meters it is above the ground.
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two blocks are on a frictionless surface and have the same mass m. block 2 is initially at rest. block 1 moves to the left with speed 4v and collides elastically with block 2. what is the final speed of block 1?
The final speed of block 1 is 2.4 times its initial speed, or [tex]2.4v[/tex]. The collision between two objects is said to be elastic if both the total momentum and the total kinetic energy are conserved.
In an elastic collision between two objects, both the total momentum and the total kinetic energy are conserved.
Let's consider the collision between block 1 and block 2. The mass of both blocks is the same, so we can write the conservation of momentum equation as:
[tex]m(4v) = m(v1f) + m(v2f)[/tex]
where 4v is the initial velocity of block 1, v1f is the final velocity of block 1, and v2f is the final velocity of block 2. Since block 2 is initially at rest, its initial velocity is zero.
Since the collision is elastic, the total kinetic energy of the system is conserved, and we can write the conservation of kinetic energy equation as:
[tex](\frac{1}{2})m(4v)^2 = (\frac{1}{2})m(v1f)^2 + (\frac{1}{2})m(v2f)^2[/tex]
Simplifying these equations, we get:
[tex]4v = v1f + v2f[/tex] (conservation of momentum)
[tex](\frac{16}{2})v^2 = (\frac{1}{2})v1f^2 + (\frac{1}{2})v2f^2[/tex] (conservation of kinetic energy)
Solving for v1f, we can substitute[tex]v2f = (4v - v1f)[/tex] into the second equation:
[tex](\frac{16}{2})v^2 = (\frac{1}{2})v1f^2 + (\frac{1}{2}) (4v - v1f)^2[/tex]
Simplifying and solving for v1f, we get:
[tex]v1f = (\frac{3}{5})4v \\ = 2.4v[/tex]
Therefore, the final speed of block 1 is 2.4 times its initial speed, or [tex]2.4v[/tex]
The collision between two objects is said to be elastic if both the total momentum and the total kinetic energy are conserved. This means that the momentum of the system before the collision is equal to the momentum of the system after the collision, and the kinetic energy of the system before the collision is equal to the kinetic energy of the system after the collision.
The law of conservation of momentum states that the total momentum of a system of objects remains constant if no external forces act on the system. In an elastic collision, the momentum of each object is conserved separately, so we can write the equation:
[tex]m1v1i + m2v2i = m1v1f + m2v2f[/tex]
where m1 and m2 are the masses of the two objects, v1i and v2i are their initial velocities, and v1f and v2f are their final velocities.
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Whether a truck comes to a stop by crashing into a haystack or a brick wall, the stopping force is
A) both the same
B) greater with the haystack.
C) greater with the brick wall.
C) Greater with the brick wall. Stopping force is determined by the amount of friction a surface provides.
What is friction ?Friction is a force that acts between two objects when they come into contact with each other. It is an important force that affects our everyday life. Friction can be both beneficial and detrimental. It is beneficial in that it allows us to walk, run, drive, and even write without slipping or sliding. It also helps us to stop when we need to. On the other hand, friction can be detrimental when it causes machines to wear down, resulting in energy being wasted. Friction can also cause heat, noise, and wear on the surfaces of the two objects.
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When there's a temperature difference between two objects, heat is transferred from the hotter object to the cooler one. What is the name for the state reached when they are both at the same temperature?
Answer:
The state when the two objects have reached the same temperature is known as thermal equilibrium.
Question 1 (1 point)
A massive asteroid in our solar system's asteroid belt, having an estimated mass of 2.6 x
1021 kg and an orbital speed of 14900 m/s. Determine the amount of kinetic energy
possessed by the asteroid.
Answer:
17.8 x 10^29 J
Explanation:
The kinetic energy (KE) of an object can be calculated using the formula:
KE = 0.5 * m * v^2
where m is the mass of the object and v is its velocity.
In this case, the mass of the asteroid is 2.6 x 10^21 kg, and its velocity is 14900 m/s. Plugging these values into the formula:
KE = 0.5 * 2.6 x 10^21 kg * (14900 m/s)^2
KE = 0.5 * 2.6 x 10^21 kg * 22.11 x 10^7 m^2/s^2
KE = 0.5 * 2.6 x 10^21 kg * 22.11 x 10^7 m^2/s^2
KE = 17.8 x 10^29 J
The asteroid possesses 17.8 x 10^29 J of kinetic energy.
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What are the two factors that determine gravitational attraction?
The two factors that determine gravitational attraction force are- 1- Mass 2- distance. Gravity is an attractive force, one that attracts all of the matter in the Universe towards all of the other bits of matter in the Universe.
What is the factors that determine gravitational attraction?On the size scale of moons, planets, stars, and galaxies, it is an extremely important force, and governs much of the behavior of these objects.
Gravity keeps our feet firmly on the ground, keeps the Moon in orbit around the Earth, keeps the Earth in orbit around the Sun, keeps the Sun in orbit around the center of our Milky Way galaxy.
When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.
This can be determined by Sir Isaac Newton’s universal law of gravitation (F=Gmm/r2). According to which the gravitational attraction is directly dependent on the mass, while it is inversely dependent on the distance.
Therefore, This means that the force of gravity increases with mass, but decreases with increasing distance between objects.
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