The acceleration of m is 2g/3 in a pulley consists of a uniform disk with mass m and radius is r and is free to rotate around a frictionless axle through its center. a mass m is hung from a string wrapped around the pulley.
mgT=ma
TR=mRa/2
T = mRa /2
= ma/2
3ma /2 = mg
a = 2g/3
The pulley's mass increases as the acceleration of the object decreases. Calculating the acceleration requires knowledge of the pulley's mass and moment of inertia. Keep in mind that the acceleration will be independent of the radius for the usual pulley forms (such as disc, hoop, and disc, mostly hoop).A pulley system's velocity is typically constant.Unless if you want to measure the centripetal acceleration of the rotating components.Newton's second law of motion states that an object's acceleration is equal to its mass divided by the net force acting on it, or a = F× m.For more information on pulley system kindly visit to
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photovoltaic cells . select one: a. are increasingly costly produce which precludes major commercial application b. rely on the electrical current produced when silicon is struck by sunlight c. require an outside source of electricity to generate electricity on their own d. have small rotational generators built into every cell
The rotor shaft of a generator is spun or rotated by the fluid's force on the blades.
What do you meant by silicon is struck?When sunlight strikes a solar cell, electrons in the silicon are expelled, causing the silicon to generate "holes"—the voids the departing electrons left behind.
Electrons will be moved to the n-type layer and holes to the p-type layer if this occurs in the electric field. The bonds [between silicon atoms] in a crystal are created by electrons that are shared by all of the atoms in the crystal.
One of the electrons in one of the bonds is stimulated to a higher energy level by the absorption of the light and is thus given more freedom to move than when it was bound. Silicon is the chosen photovoltaic (PV) material because it has a high absorption rate and can generate power from solar energy.
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A 100 kg car starts from 20 m/s and speeds up to 41 m/s in 7 seconds. Determine the car's
acceleration.
Answer: 3 m/s^2
Explanation:
Acceleration equals change in velocity (speed) divided by total time.
a = (v2-v1)/t
a = (41 m/s - 20 m/s) / 7 s
a = 3 m/s^2
Mass is irrelevant in this question.
FILL IN THE BLANKS
12) When two objects interact through the gravitational force between them, the more massive one has a lower ___________ than the less massive object.
13) A student walks 20 m north, 10 m south, and 3 m north. To have a displacement of 0 m,
the student should walk _____m toward the _____.
14) Jennifer's thinking is not supported by Newton's _______ law of motion because during the collision, the force on her bumper car must be _______ in size and _______ in direction to the force on her father's bumper car.
12. When two objects interact through the gravitational force between them, the more massive one has a lower acceleration than the less massive object.
13. A student walks 20 m north, 10 m south, and 3 m north. To have a displacement of 0 m, the student should walk 13m toward the south.
14. Jennifer's thinking is not supported by Newton's third law of motion because during the collision, the force on her bumper car must be equal in size and opposite in direction to the force on her father's bumper car.
calculate the eccentricity for the planet if the distance between foci is 5,000,000 km and the distance of the major axis is 299,000,000 km.
The eccentricity for the planet if the distance between foci is 5,000,000 km and the distance of the major axis is 299,000,000 km is 0.0167.
Calculation:
The eccentricity of an elliptical orbit is defined by the ratio:
e = c/a
where:
c is the distance from the center of the ellipse to either focus
e = eccentricity
a = positive for an elliptical orbit
The eccentricity can be calculated as follows:
e = 5 × 10⁶km ÷ 299 × 10⁶km
e = 0.0167
Eccentricity is also the ratio of the semimajor axis a to the distance d from the center to the directrix. Eccentricity can be represented by flattening. Eccentricity can be defined by how much a conic actually deviates from the shape of a circle.
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which is a major difference between what we've seen in discovered exoplanets and our own solar system?
The major difference between what we've seen in discovered exoplanets and our own solar system is that extrasolar planet orbits tend to be closer and more eccentric than in our Solar System.
Exoplanet:
Any planet outside of our solar system is an exoplanet. The majority of exoplanets orbit other stars, while rogue planets—free-floating exoplanets that are unattached to any star—orbit the galactic center.
All of the planets in our solar system orbit around the Sun. Planets that orbit around other stars are called exoplanets.
Exoplanets are very hard to see directly with telescopes. They are hidden by the bright glare of the stars they orbit.
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a skydiver dives from an airplane. air resistance is measured each second following the skydiver’s jump.
a. the skydriver has the slowest speed 2 seconds
b.the skydriver has the slowest speed 4 seconds
c.the skydriver has the slowest speed 1 seconds
d.the skydriver has the slowest speed 3 seconds
b. The skydriver has the fastest speed at 4 seconds statement best identifies her speed at each second.
The process by which friction slows something moving through air is known as air resistance.
The object's velocity, surface area, and shape all play a role in air resistance. Air density and resistance are affected by temperature, humidity, and altitude.
The greater the resistance, the greater the area and the greater the speed. The frequency at which air molecules come into contact with the object increases with speed. Air resistance increases as a result.
As a result, the sky driver's speed also increases as the air resistance of the 500N driver increases.
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(complete question)
A skydiver dives from an airplane. air resistance is measured each second following the skydiver’s jump.
Time after jump | Weight | Air Resistance
1 sec | 500 N | 200 N
2 sec | 500 N | 300 N
3 sec | 500 N | 400 N
4 sec | 500 N | 500 N
Which statement best identifies her speed at each second?
a. The skydriver has the slowest speed at 2 seconds
b. The skydriver has the fastest speed at 4 seconds
c. The skydriver has the slowest speed at 1 second
d. The skydriver has the fastest speed at # seconds
gravel is being dumped from a conveyor belt at a rate of cubic feet per minute. it forms a pile in the shape of a right circular cone whose base diameter and height are always the same. how fast is the height of the pile increasing when the pile is feet high? recall that the volume of a right circular cone with height and radius of the base is given by .
The fast is the height of the pile increasing when the pile is feet high 0.1989 ft/min.
Calculation:
Here given the rate of change in volume DV/DT = 40 actions and we need the rate of change in height when height h = 16.
Putting all values.
40 = π/4 x (16)² x DV/DT
= DV/DT= 40 x 4/ 1×16×16
0.1989 ft/min.
Rate of change in height when height is 16 H is equal to 0.1989 ft/min.
The goal is to get a text from as many modalities as possible so that models trained on The Pile have broader generalization capabilities. For stakes, experts believe it comes from the Latin word pira. Pila loosely translates to the ball. If you've ever seen inflamed hemorrhoid, you'll understand this moniker better. Many hemorrhoids actually look like small round spheres.
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the radiative zone of the sun is just outside the core which has temperatures of about 7 million degrees celsius. t or f
It is a true statement that the radiative zone of the sun is just outside the core which has temperatures of about 7 million degrees Celsius.
What is the radioactive zone of the sun?We know that the sun is a sort of massive ball of fire in the universe. The sun is always producing heat and the heat that is obtained from the sun is felt al over the earth. Having said that, we now need to examine the way and manner that the sun is able to produce the heat and the light that we receive.
We know that the reaction takes place in the sun is a nuclear reaction and the reaction has to do with the combination of the two nuclei of hydrogen so as to produce a helium ucleus and this is a nuclear fusion which does produce a lot of heat and light. The reaction occur just outside the core of the sun.
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Use the information and table to answer the following question! A skydiver dives from an airplane. air resistance is measured each second following the skydiver’s jump.
Time After Jump Weight Air Resistance
(seconds) Newtons (N) Newtons (N)
1 seconds 500N 200N
2 seconds 500N 300N
3 seconds 500N 400N
4 seconds 500N 500N
Which statement BEST identifies the skydiver's speed at each second?
a. The skydiver has the slowest speed at 2 seconds
b. The skydiver has the fastest speed at 4 seconds
c. The skydiver has the sloweat speed 1 second
d. The skydiver has the fastest speed at 3 seconds
The skydiver has the fastest speed at 4 seconds, and the correct statement is (b) "The skydiver has the fastest speed at 4 seconds".
To determine the skydiver's speed at each second, we need to consider the forces acting on the skydiver. In this case, the forces acting on the skydiver are the weight of the skydiver and the air resistance. The weight of the skydiver is constant at 500 N, while the air resistance increases with time.
According to Newton's second law of motion, the acceleration of an object is equal to the net force acting on it divided by its mass. In this case, the mass of the skydiver is not given, so we cannot calculate the acceleration directly.
Speed is the rate of change of displacement over time. In this case, the displacement of the skydiver is not given, so we cannot calculate the speed directly. However, we can use the information provided to determine the skydiver's speed at each second.
From the table, we can see that the air resistance increases with time, reaching a maximum of 500 N at 4 seconds. This means that the net force acting on the skydiver is greatest at 4 seconds, which would correspond to the highest acceleration and the fastest speed.
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What is the relationship between the net force applied to an object and the work done on that object?
Answer:
work done is directly proportional to the net force acting on the object.
Explanation:
work done = Force × displacement
at what time does the particle have a velocity of 20 mys? (b) at what time is the acceleration 0? what is the significance of this value of t?
The particle moves at a speed of 20 m/s at time t = 0 or t = 5 seconds, respectively. The t-value calculates the magnitude of the difference in relation to the variance in your sample data.
What does velocity vs. speed mean?Velocity, as opposed to speed, refers to the pace of direction of the an object's movement as it moves down a path. In other words, whereas velocity is a vector, speed is a scalar quantity. a=dvdt=d2xdt2
How do velocity and acceleration differ?Velocity refers to the speed at which displacement changes. The pace at which speed changes is known as acceleration. Because it consists both of magnitude and direction, the velocity is a vector quantity. Since acceleration is merely the rate at which velocity changes, it too is a vector quantity.
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why the force needed to keep an object traveling in the same size circle is larger the faster the object is going.
A body's direction constantly shifts as it circles around. This shift in direction causes a change in velocity, which causes the motion to accelerate. We know from Newton's First Law that an external force is necessary to produce acceleration. Therefore, a force is required to maintain the body's circular motion.
What force must be applied to maintain an object's motion in a circle?A net force called a centripetal force acts on an object to keep it moving in a circular motion.
According to Newton's first law, unless a force acts on an object, it will either stay in place or continue to move at a constant speed. Inertia is the term for this notion. An object has more inertia the heavier it is (or the more mass it has). Due to their greater inertia, heavy objects are more difficult to move than light ones.
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a 7.00-kg mass is hung from the bottom end of a vertical spring fastened to an overhead beam. the object is set into vertical oscillations having a period of 2.60 seconds. what is the force constant of the spring?
The force constant of the spring is 42.1 m.
What is force?Force is a physical quantity that is related to the interaction between two objects. It is a vector quantity, meaning it has both magnitude and direction. Force can be thought of as a push or a pull between two objects. When one object exerts force on another object, the second object experiences an equal and opposite reaction force. Some of the most common examples of force include friction, gravity, electric fields, and magnetism. Force is a key concept in physics, as it is often used to explain the motion of objects and the behavior of physical systems.
The force constant, or spring constant, of the spring can be calculated using the equation:
k = (4π^2m)/T^2. In this equation, m is the mass of the object and T is the period of oscillation.
Therefore, the force constant of the spring is
k = (4π^2*7.00kg)/(2.60s)^2 = 42.1 N/m.
This means that if a 1 N force is applied to the spring, it will stretch by 42.1 m.
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3) Knowing an object’s position requires which of the following?
A) speed
B) time
C) displacement
D) reference point
the student wishes to repeat the using different slit separations. what is the smallest slit separation, in micrometers, that produces a first-order maximum?
The spacing is m at its smallest (micron) is the least distance between two slits required to create a second-order maximum for all visible light—that is, a second-order maximum for all visible wavelengths. The spacing is m at its smallest (micron).
How far apart are the slits from one another?In Young's double slit experiment, the slits are separated by 0.1 mm, the light employed is 600 nm in wavelength, and the interference pattern is seen on a screen 1 m from the slits.
Due to its dependence on L, the spacings between various fringes get smaller as the distance between the slits gets more. The distance between various fringes grows as the light's wavelength rises.
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if we want to see what galaxies looked like at a time close to the beginning of the universe, where should we look?
Answer: 4 billion years ago
Explanation:
true or faule because only one path exists for the current to flow through a series circuit, it must flow through each resistor in the circuit.
In a series circuit, there is only one path for the current to go, hence each resistor in the circuit must conduct current. For series-connected resistors, this assertion is accurate.
Why does a series circuit just have one path for current?This is thus because a series circuit only has one path for current to move along. Since conductors carry electric charge, the rate of flow at any point in the circuit at any given instant must be equal.
What takes place when a circuit path is damaged?Current will stop flowing in the circuit if any section of this path is damaged. Any series-connected set of parts in a circuit that doesn't have any junctions must all have the same amount of current flowing through them. Devices are connected in a parallel circuit so that current can go along more than one closed path.
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the rope-and-pulley system of negligible mass shown above supports a block of weight w that is at rest. if the tension throughout the rope is uniform, what is the reading on the spring scale?
The rope-and-pulley system of negligible mass shown above supports a block of weight w that is at rest. if the tension throughout the rope is uniform.
To determine the reading on the spring scale, we can apply Newton's Second Law of Motion to the block of weight w. The net force on the block is equal to the block's mass times its acceleration: F net = ma The only force acting on the block is the force of gravity, which is equal to the weight of the block: F net = F gravity = w The acceleration of the block is zero, since it is at rest: w = ma = m * 0 . This equation tells us that the force of gravity on the block is zero, which means that the block is in equilibrium and the tension in the rope is zero. Therefore, the reading on the spring scale is zero.
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Answer:
W/2
Explanation:
The original question does not include a diagram which is necessary for answering the question.
The diagram shows a spring scale attached to the ceiling. Below the spring, 2 pulleys are attached, holding the block at 2 separate points. As a result, there will be 4 ropes (2 attached to the spring scale, and 2 to the ceiling).
Because the tension is dispersed evenly among the 4 points, we can say that the scale will only read half the weight as the rest of the tension will be held by the ceiling.
Therefore, the spring scale will read W/2
I wish that I can upload the diagram, but unfortunately, I cannot. I assume that you will have access to the diagram.
Hope this helped!
A container of gas at 42 psi is compressed to one sixth it’s original volume. What is the new pressure of the gas?
The ideal gas equation can be changed to demonstrate that the pressure of a sample of gas is directly proportional to the amount of gas present, volume, and temperature being held constant: P=n(RTV)=n×const.
What compressed pressure of the gas?The pressure inside the object increases when medium is added to the newly created area. Because energy is being added during compression, the temperature of the medium may significantly rise or fall.
Therefore, compressing a medium is necessary to raise pressure. Compression reduces the volume of the medium that makes up a thing.
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What is the effect on the speed of a fighter plane chasing another when it opens fire? What happens to the speed of pursued plane when it returns the fire?
When the fighter plane opens the fire, its momentum will be in backward direction and its speed decreases.When pursued plan opens fire in backward direction.then the momentum of plane will be in forward direction and its speed increases.
hey, remind me about the expansion of spacetime driven by dark energy: what kind of universe do we live in?
We live in universe driven by dark energy consists stars and planets where every object have some mass and contains other properties too.
Dark energy has the cosmoslogists scratching their heads. Perceptions taken by NASA's Hubble Space Telescope and future space telescopes will be required to decide the properties of dull energy, which makes up around 70% of the universe.
Testing dark energy, the energy in void space making the growing universe speed up, calls for precisely estimating how that development rate is expanding with time. Dark energy is remembered to divide space.
Cosmologists accept around 70% of the universe comprises of dull energy, 25% is dim matter, and just four percent typical matter (the stuff that stars, planets and individuals are made of). Hubble perceptions recommend the dim energy might be Einstein's cosmological consistent, an energy permeating out of the vacuum of the space between universes.
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Calculate the energy transferred by an appliance using mains electricity (230v) if the charge is 150c. Give your answer in kilojoules.
The energy transferred by an appliance using mains electricity is 34500 Joule.
What is energy?
In physics, energy is the ability to perform work. It could exist in several different forms, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc. Additionally, there is heat and work, which is energy being transferred from one body to another. Energy is always assigned based on its nature once it has been transmitted.
Given that: charge of the particle: Q = 150 C.
Potential difference applied: V = 230 V.
Hence, the potential energy of the particle: E = QV
= 150 × 230 Joule
= 34500 Joule.
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in the absence of an external magnetic field, can we say that one electron con- figuration has a lower energy than the other?
No, we are unable to determine which configuration has lower energy in the absence of a magnetic field.
How does the magnetic field affect energy levels?The atomic energy levels are split into a greater number of levels and the spectral lines are likewise split when magnetic fields are present. The Zeeman Effect is referred to as this splitting. E = 1/2 LI 2 is the equation for the energy held within a magnetic field. The work required to produce a current through an inductor is equal to the energy stored in a magnetic field.
Does the magnetic field contain energy?Energy, also known as magnetic energy, is present in every magnetic field. She is a physics constant. Since an electric current creates a magnetic field, magnetic energy is a kind of moving charge carrier (electrons).
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terference is a property of a. light waves. b. sound waves. c. water waves. d. all of these e. none of these
When two Polaroids' axes are parallel, light cannot flow between them. a 45° angle between them. Parallelc. Perpendiculard. a pair of these. each of these 45.
An entrepreneur suggests providing polarised background music for offices and allowing those who would rather not hear it to do so by using polarising earbuds.Mechanical vibrations in the form of sound waves are transmitted from an item to the ear. These vibrations may arise from a person's voice, a musical instrument, thunder, or an earthquake and can be audible or inaudible. By connecting a pair of headphones to the speakers and turning on the sound, a sound wave can be heard.
Light is electromagnetic radiation, and light is electromagnetic radiation.
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describe how energy travels from the nuclear core of the sun to the atmosphere. in your answer, include the name of each layer and describe how energy moves through the layer.
Energy travels from the nuclear core of the Sun to the atmosphere through a process called thermal radiation. Thermal radiation is the emission of electromagnetic waves from a body due to its temperature.
The Sun is composed of several layers, including the core, the radiative zone, and the convective zone. Energy travels through these layers as follows:
1. Core: The core is the innermost layer of the Sun and is where nuclear fusion reactions take place. In these reactions, hydrogen atoms are combined to form helium, releasing a large amount of energy in the process. This energy is in the form of electromagnetic radiation, including visible light and ultraviolet radiation.
2. Radiative zone: The radiative zone is the layer of the Sun just outside the core. In this layer, the energy released in the core is transported outward through the process of thermal radiation. Photons, or particles of light, are emitted from the surface of the core and travel through the radiative zone, gradually losing energy as they move outward.
3. Convective zone: The convective zone is the outer layer of the Sun. In this layer, the energy transported by thermal radiation is not enough to sustain the temperature of the Sun, so the energy is transferred through the process of convection. In convection, hot gas rises and cool gas sinks, resulting in the transfer of heat from the interior of the Sun to the surface.
Overall, energy travels from the nuclear core of the Sun to the atmosphere through the process of thermal radiation and convection. These processes help to transport energy from the core of the Sun to the surface, where it is emitted into space as electromagnetic radiation.
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the leaning tower of pisa is 55 m high and 7.0 m in diameter. the top of the tower is displaced 4.5 m from the vertical. how much more would the top have to be displaced for the tower to be on the verge of tipping? assume the tower is a uniform cylinde
Two parallel circular bases and a curving surface define a cylinder. The height of the cylinder is equal to the angle between the two bases.
What do you meant by uniform cylinde?A cylinder is a three-dimensional solid figure with two identical circular bases connected at a specific distance from the center, which determines the cylinder's height, by a curving surface. Examples of cylinders in real life are toilet paper rolls and beverage cans.
Geometrically speaking, a cylinder is a three-dimensional shape. A cylinder is circular and has a top and bottom with a circled shape. Both the top and bottom are flat and identical in size.
One of the most fundamental curvilinear geometric shapes is the cylinder (from the Greek letter o, romanized as kulindros, meaning "roller" or "tumbler"). It is referred to as a prism with a circle as its base in elementary geometry.
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consider the harmonic oscillator with dynamics written as with parameters . if the initial position and velocity of the oscillator are given by , what is the position of the oscillator at seconds?
The position of the oscillator at seconds is ( A cos ( ω t + ϕ ) where A is the amplitude and ϕ is the initial phase and f = 1/T = ω/2π.
What is the mean position in oscillation?Equilibrium or Mean Position: It is a state in which the body is in when there is no net force pushing against it. When a particle is oscillating, it is in its phase This is a representation of the particle's vibrational state at a particular instant.
Is the oscillation period measured in seconds?The period of an oscillating system is the length of time it takes for a cycle to be completed. A system's period is a time measurement, and in physics, it's typically represented by the capital letter T. Although seconds are the most common, period is measured in time units relevant to that system.
What is the equation for an oscillating period?Time, or T, is the oscillation's period, hence ωT = 2π or T = 2π/ω. The formula f = 1/T = ω/2π. gives the reciprocal of the period, or the frequency f, in oscillations per second.
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consider a system of particles interacting with each other through potentials depending only on the scalar distances between them and acted upon by conservative central forces from a fixed point. obtain the hamiltonian of the particle with respect to a set of axes, with origin at the center of force, which is rotating around some axis in an inertial system with angular velocity w. what is the physical significance of the hamiltonian in this case? is it a constant of the motion?
The Hamiltonian of a system defines its total energy, which is the product of its kinetic energy (that of motion) and potential energy (that of position). No, it is not a constant of motion.
Lagrangian and Hamiltonian definitionsThe distinction between kinetic and potential energy is what gives rise to lagrangian. The Italian mathematician discovered the Lagrangian in the year 1788. Cartesian coordinates are a lagrangian representation. The mathematically sophisticated version of classical mechanics is known as the Hamiltonian.
Hamiltonian mechanics can also be used to derive the radial force formula. The Hamiltonian is denoted by the following in polar coordinates:
The conjugate momentum of the azimuthal angle, p, is a constant of the motion because it does not appear in the Hamiltonian. The Hamiltonian equation of motion for demonstrates that this conjugate momentum is the magnitude L of the angular momentum.
dφ/dt = δH/δpφ = pφ/mr² = L/mr²
The motion equation for r that corresponds to this is
dr/dt = δH/δpr = [tex]p_{r}[/tex]/m
The radial-force equation is obtained by taking the second derivative of r with respect to time and substituting Hamilton's equation of motion for pr.
d²r/dt² = 1/m dpr/dt
d²r/dt² = -1/m (δH/δr)
d²r/dt² = p²φ/m²r³ - 1/m dU/dr
d²r/dt² = L²/m²r³ + 1/mF(r)
No, it is not a constant of motion.
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what is the current through the heating element of an electric toaster oven if the heater has a resistance of 5 ohms and it is connected to 120 volts?
Answer:
24 A
Explanation:
Ohm's Law: V = IR, so I = V/R
I = 120V/5Ω = 24 A
40 POINTS HELPP
The Anthropocene is still considered an informal designation because International Union of Geological Sciences (IUGS), the international organization that names and defines epochs, has not officially designated it an epoch. Their criteria for the designation of a new epoch are that there should be evidence of human impacts and change in the rock record.
What activities and impact could humans be responsible for that might be reflected in the rock record and thus determine the beginning of the Anthropocene?
(Minimum of two sentences please)
Answer:
One example of an activity that could be reflected in the rock record and contribute to the beginning of the Anthropocene is the widespread use of fossil fuels, which has led to an increase in atmospheric carbon dioxide concentrations and a corresponding shift in the Earth's climate. Another potential contributor to the Anthropocene is the proliferation of plastic and other synthetic materials, which are becoming ubiquitous in the geologic record and may persist for thousands of years.
