Yes this statement is true about electrical resistance.
What is electrical resistance ?
electrical resistance is a force that counteracts the flow of current.
Sol- when two lamps are connected in parallel to a battery, the total electrical resistance that the battery senses is more than the resistance of either . Beacuse In a parallel circuit each bulb is in its own circuit. As bulbs are added the resistance in the circuit decreases since each circuit is another pathway for electrons to move from one end of the circuit to the other.when two lamps are connected in series to a all the battery the electricals resistance that the battery's senses is the more than the resistance of either lamp.
As each bulb is connected in parallel to the battery, each has the same potential difference across it as the all of voltage across the battery of the terminals. All other to the potential differences are zero, as all the wires have to the zero resistance.
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why when tuning a radio do you hear only one station at a time rather than hearing many stations at once?
We are able to hear only one station because of the specific associated with radio station that has a specific radio wave.
What all does a radio wave comprise of ?
The all radio waves are made up of three parts: wavelength, amplitude and frequency.
If the two waves (with the same amplitude) are shifted by exactly half a wavelength when they merge together, then the crest of one wave will match up perfectly with the trough of the other wave, and they will cancel each other out.
That is why every radio wave is assigned it's own amplitude and frequency length, so that when the device is turned on, only one radio station is audible.
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4) from the plots, determine the short-circuit current corresponding to the same value of field current which produced the rated open-circuit voltage.
Short circuit current vs field current slope from the curve for If=0.2 and If=0.4.
Slope = (Isc(If=0.4)-Isc(If=0.2))/2
An electric current modern-day is a circulation of charged debris, which include electrons or ions, transferring through an electrical conductor or space. it's miles measured because the net charge of go with the flow of electrical charge thru a floor or into a manipulated volume.
The current flowing in a circuit may be utilized in a diffusion of approaches from producing warmness to inflicting circuits to exchange, or statistics to be stored in an integrated circuit.
There are three simple currents utilized in business healing electric stimulation units: direct cutting-edge, alternating contemporary, and pulsed modern-day.
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a 7.2 kg mass sits at rest on a rough surface the surface has the following coefficients of friction coefficient of static friction 0.52 and coefficient of kinetic friction 0.29 determine the necessary applied force required to cause an acceleration of 1.6 m/s^2
The force required to accelerate is 28 N.The acceleration of a cart with a mass of 25 kg and applied force of 50 N is 2 m/s².
Determine the necessary applied force required to cause an acceleration ?The mass of a block of ice that is accelerated to 6 m/s2 by a force of 3 Newtons is 0.5kg.A free body diagram is a sketch of forces acting on an object. It consists of the applied force, weight of the object, frictional force and normal reaction.Force required to accelerate the block .The force required to accelerate the block is calculated as follows;F = ma
F = 3.5 kg x 8 m/s²
F = 28 N
Acceleration that cart
The acceleration of a cart with a mass of 25 kg and applied force of 50 N is calculated as follows;
a = F/m
a = 50/25
a = 2 m/s²
Mass of the block of ice
The mass of a block of ice that is accelerated to 6 m/s2 by a force of 3 Newtons is calculated as follows;
m = F/a
m = 3 N / 6 m/s²
m = 0.5 kg
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The following image is a cross section of an asymptotic giant branch star. Place each label in the correct position on the image.
core: non burning carbon
shell of core: burning helium
white shell: burning hydrogen
outside: non burning hydrogen
Core: non burning carbon
Shell of core: burning helium
white shell: burning hydrogen
outside: non burning hydrogen
What is an asymptotic giant branch star?
With a brightness up to thousands of times larger than the Sun, an asymptotic-giant-branch star will appear as a bright red giant.
Its interior structure is made up of a central, mostly inert core of carbon and oxygen, a shell where helium is undergoing fusion to form carbon (known as helium burning), a second shell where hydrogen is undergoing fusion to form helium, and a very large envelope of material with a composition similar to that of main-sequence stars (except in the case of carbon stars).
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Suppose the size of a process is 10,000 bytes and the relocation register is loaded with value 5000, which of the following memory address this process can access?
Select one:
a. physical address 4,500
b. logical address 10,350
c. None of the above
d. physical address 10,350
d. physical address 10,350
None of the above memory address this process can access. The space required is 4608 bytes. A memory address is a reference to a particular memory region that is utilised by hardware and software at different levels.
What is the size of a memory address?An individual byte (or eight bits) of storage is identified by one address. A series of consecutive addresses may be used to store data bigger than one byte.
The page size is 256 bytes, and the page field is 8 bits wide.The first level page table points to 1024 second level page tables, each of which points to 256 third level page tables, each of which contains 64 pages using the subdivision described above. The program's address space is 1024 pages, so 16 third-level page tables are required.Therefore we need 16 entries in a 2nd level page table, and one entry in the first level page table. Therefore the size is: 1024 entries for the first table, 256 entries for the 2nd level page table, and 16 3rd level page table containing 64 entries each. Assuming 2 bytes per entry, the space required is 1024 * 2 + 256 * 2 (one second-level paget table) + 16 * 64 * 2 (16 third-level page tables) = 4608 bytes.To learn more about memory address refer :
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what relationship do you see between the pressure line and the wind speed line on your graph? (hint: remember that pressure gradients, not low pressure itself creates strong winds.)
A difference in air pressure that is horizontal causes wind.
Fluids (i.e., liquids or gases) can apply pressure in addition to solid surfaces. You might find this unusual if you give it some thought because it's difficult to envision driving a nail with liquid. Imagine being in some depth of water to help you understand this. The weight of the water above you would be pressing down on you due to gravity, which would generate pressure on you. Going deeper would result in more water above you, which would also result in additional weight and pressure from the water. Both the weight of gases and the weight of liquids have the ability to apply pressure. The significant weight of the air in our atmosphere, for example, plus the fact that we're almost always at the bottom of it.
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What method can be used to convert length measurements between english and metric?.
The term "metric system" refers to a set of formulas used to determine an object's mass, length, and volume.
Which metrics are fundamental?The inch, foot, yard, and mile are the foundational units for measuring length or distance in the English system. Rod, furlong, and chain are some other units of length. foot of the survey The English metric system normally measures areas in square feet or square yards.
What are the four forms of measuring?Four distinct measuring scale types are seen (nominal, ordinal, interval and ratio). The information about the variables being assessed that is provided by each of the four scales is often more than that of the scales that come before it.
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List the states of matter in order = of increasing entropy: List the solids Au; Al, C in order of increasing entropy at 258C: Explain why more complex molecule like NO has higher entropy than Ar:
The increasing order of entropy of state of matter is Solid < Liquid < Gas and the of the solid is C < Al < Au, and NO has higher entropy because of the greater complexity in molecule.
The entropy of a substance can be defined as the degree of randomness of the substance.
Among, solid liquid and gas,
The state of matter in increasing order of entropy are,
Solid < Liquid < Gas.
The entropy of the substance depends on the molecular mass of the substance, so, among Au, Al and C,
The increasing order of entropy is C < Al < Au.
Among NO and Ar, Complex molecule like NO has higher entropy because of the presence of more bond and more number of electrons.
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Am object of ma 4 i thrown vertically upward from level ground with initial peed of 20. How high did the object go
The maximum height of the object when thrown at the speed of 20 m/s is 20 m.
What is speed?
Speed is the magnitude of the rate of change of the position of any object with time which is a scalar quantity. It is the ratio of speed by time with the unit m/s or cm/s.
The height this object can travel with initial speed of 20 m/s can be calculated as,
v^2 = u^2 + 2as
where v is the final velocity, u is the initial velocity a is the acceleration due to gravity s is height.
0 = 20^2 + 2 (-10) s
s = 400 / 20 = 20 m
Therefore, the maximum height the object can travel with initial speed of 20 m/s is 20m.
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if the zero level is a distance 2h/3 above the floor, what is the potential energy u of the block on the floor? express your answer in terms of some or all the variables m , v , and h and any appropriate constants.
If the zero level is a distance 2h / 3 above the floor, the potential energy U of the block on the floor is - 2 m g h / 3
U = m g h
U = Potential energy
m = Mass
g = Acceleration due to gravity
h = Height
h = - 2 h / 3
U = - 2 m g h / 3
Here, the ground is not taken as zero level. But a point height 2 h / 3 is taken as zero level. So the block falls down a height of 2 h / 3. Since the movement is downwards the change in distance - 2 h / 3.
Therefore, if the zero level is a distance 2h / 3 above the floor, the potential energy U of the block on the floor is - 2 m g h / 3
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What is the find kinetic energy of the car?.
The kinetic energy of a moving car object is KE=1/2mv².
Where mass is m and the velocity is v of the vehicle.
E = 1/2mv² describes how the mass and speed of a moving object affect its stored kinetic energy. Cars have twice as much kinetic energy when they are twice as heavy, and four times as much kinetic energy when they are twice as quick. The kinetic energy that is stored in the car must be released when it slows down. These little amounts of energy are used to heat the road, the environment, and different rotating car parts. However, when you stomp on the brakes, the vast majority of the kinetic energy is transformed into heat by the brake pads.
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What are the characteristics of a scientific model?.
A scientific model is a depiction of actual events. To better grasp the event under consideration, scientists, educators, and students all employ scientific models.
Scientists can also create predictions about a phenomenon's behavior based on evidence obtained about it by using models. Diagrams, a physical three-dimensional model, computer simulations, and mathematical formulas are a few examples of scientific models.
Every discipline of science uses scientific modelling, and it's the preferred method for explaining scientific concepts. When interpreting data, the scientific method relies heavily on the creation and application of models.
The purpose of models is to explain how a phenomenon works. Simulations are predictive models, which can be used to forecast behavior. Simulations can be visual representations of potential outcomes based on data collected, computer simulations, predicted trend graphs, or other formats.
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a gaussian surface encloses electric charges q1 and q2, while charge q3 is located outside the surface. refer to the figure.
According to Gauss law, the electric field at point P is E₁ + E₂ due to charges Q₁ and Q₂ only.
Gauss law states that the electric flux across any closed surface is proportional to the net electric charge q enclosed by the surface.
Gauss law states that the entire quantity of electrical flux passing thru any closed surface is directly proportional to the enclosed electric-powered price. The applications of Gauss regulation are special to discovering the electric subject because of countless symmetries consisting of: Uniformly charged immediately twine.
This law is known in honor of the excellent German mathematician and scientist Karl Friedrich Gauss. The electrical flux via a floor is proportional to the number of field strains crossing that floor. That this indicates the significance is proportional to the part of the sphere perpendicular to the location.
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What happens when two bar magnets attract each other?.
Magnets' oppositely polarized poles attract and repel one another. That the magnets repel one another is a known. We may conclude from this that the poles facing one another would be north-north or south-south.
When two magnets are brought close together, their opposing poles attract one another while their similar poles repel one another. Similar to how electric charges work. Different charges attract while similar charges repel. Magnets have been used for determining direction for a very long time because a free hanging magnet will always face north. Similar poles in magnets repel one another, while opposite poles are drawn together. So, when two magnets' north poles are placed close to one another, they will repel one another. polarized poles from two magnets that are brought close together interact. The Figure below shows how they interact. In contrast to two north poles, the north and south poles' lines of force are attracted to one another.
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An object of mass m is hanging by a string from the ceiling of an elevator. The elevator is moving up at constant speed. What is the tension in the string?.
The tension in the string, when the elevator is moving with constant speed is equal to the product of mass and gravitational force.
Tension is the pulling force carried by the flexible mediums like ropes, cables and string.
The tension in the body caused by the weight of the hanging body is the net force acting on the body.
For a body of mass (m) suspended on a string, the tension force of the string can be entered in three ways,
The tension in the string when the body is at rest or moving at a constant speed. At rest, the tension will be the product of the gravitational force times time. It can be given as, T = mg.Tension in the string when the body is moving upwards. When the body is moving upwards, both gravitational force and acceleration force are acting on it and the magnitude of the tension will be due to the sum of the two forces. This can be written as, T = m(g + a).Tension in the string as the body moves down. As the body moves down, differentiate the gravitational and acceleration forces acting on it. It can be given as, T = m(g - a)Because the object is hanging by a string from the ceiling of the elevator and the elevator is moving upward at a constant speed.
As the elevator moves at a constant speed. Thus, the magnitude of the tension in the string, T = mg.
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Suppose we see an exoplanet dim the light of a distant star by 1%. If the star has a diameter of 1. 4 million km, what is the approximate diameter of this planet?.
The approximate diameter of this planet is 140,000 km.
From the question, we have
exoplanet dim the light of a distant star by 1%
the ratio of the diameter of planets and stars is 1: 100
The approximate diameter of this planet is
= 1,400,0000 × 1/100 = 140,000 km
Exoplanet:
Astronomers have directly observed the spectrum of visible light bounced off an exoplanet for the first time ever. The simplest extrasolar planets to find by the radial-velocity method are hot Jupiters because the oscillations they induce in the motion of their parent stars are relatively massive and rapid compared to those of other types of planets. The size of the Neptune planets is similar to that of our solar system's Neptune or Uranus. It was first found ten years ago by the NASA satellite Kepler. Two stars, Kepler-16b and Kepler-17b, rotate around and around one another.
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Is called radiogenic heat?.
Within the subject of technology, radiogenic heat may be described because of the type of warmth that is released when radioactive isotopes disintegrate. consequently, we say that the thermal strength is launched by means of the nuclear disintegration of the radioactive isotopes.
Approximately 50% of the Earth's inner warmness originates from radioactive decay. four radioactive isotopes are chargeable for the general public of radiogenic warmness because of their enrichment relative to different radioactive isotopes uranium-238 (238U), uranium-235 (235U), thorium-232 (232Th), and potassium-40 (40K).
Radioactive heating refers back to the power dissipated within the interiors of planets, satellites, or asteroids as a consequence of the radioactive decay of radioactive isotopes (see radiochemistry). Radioactive isotopes are characterized by their decay energies and their half-lives.
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What is the relationship between dipole moments and the magnitude of the partial charges?.
The relationship between dipole moments and the magnitude of the partial charges is that they are directly proportional
What is relationship between dipole moments and the magnitude of the partial charges ?The dipole moment increases with the magnitude of the electronegativity difference. The size of the dipole moment is also determined by the charge separation distance. A measurement of a molecule's polarity is its dipole moment.
The bond dipole moment's size depends on the atoms' distance from one another and their partial charges. Because not all polar molecules have the same amount of a dipole moment, not all molecules are equally impacted by electric fields.
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What is the correct order of events in mitosis?.
The order of events in mitosis is prophase, metaphase, anaphase, and telophase.
Mitosis or M phase is a cell division process by which the cells divide to yield two identical cells. This type of cell division undergoes the following events:
Prophase is the first stage where the chromosome becomes condensed. At the end of this stage, the cell does not show a nuclear envelope, Golgi complexes, endoplasmic reticulum, and nucleolus.During metaphase, the spindle fiber attaches to the kinetochores of the chromosome and starts to line up on the metaphase plate. During anaphase, the centromeres split and the chromatids get separated. Chromatids move toward the poles.During telophase, chromosomes cluster at opposite spindle poles. Nuclear envelope, Golgi complex, and ER reforms.To know more about mitosis:
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The three types of meteorites come from different parts of their parent bodies. Stony-iron meteorites are rare because.
Stony-iron meteorites are rare because a small part of the parent body constitutes both iron and stone.
What are Stony-iron meteorites?Stony-iron meteorites can be described as meteorites that consist of nearly equal parts of meteoric iron and silicates. This differentiates them from the stony meteorites, which are silicates, and the iron meteorites, which are meteoric iron.
Stony-iron meteorites can be described as all differentiated, meaning that they indicate signs of alteration. The stony-irons are classified into mesosiderites and pallasites. Pallasites contain a matrix of meteoric iron with embedded silicates. Mesosiderites are breccias that represent signs of metamorphism. Meteoric iron happens in class instead of a matrix.
Stony-iron meteorites are uncommon because a small part of the parent body constitutes both iron and stone.
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Initially, a person is sitting stationary on stool that can rotate on a frictionless pivot, and the person is holding a spinning wheel with its axis vertical as shown. The moment of inertia of the person+stool about the stool's axis is Ip 20 kg m2. The wheel has moment-of-inertia Iw 5 kg m2 about it axis and it is initially spinning at f 4 revs/s. The person briefly reaches up, presses her hand against the wheel, slowing the wheel so that is it spinning at 2 revs, always holding the wheel axis vertical. What is the final rotation rate of the person, after the wheel has slowed? |w = 5 kg m2 |w = 5 kg m2 fw = 4 rev/s fw = 2 rev/s Ip - 20 kg m2 Ip 20 kg m f=? Initial Final
The final rotation rate of the person, after the wheel has slowed according to conservation of angular momentum is 0.5 rev/sec.
Conservation of angular momentum is a physical property of a spinning system in which the spin remains constant unless acted on by an external torque; in other words, the rotational speed is constant as long as the net torque is zero.
Moment of inertia of wheel , Iw = 5kg m2
Moment of inertia of inertia of person + stool, Ip =20kg
Initial angular speed fw = 4 rev/s
Initial angular speed, f = 0 rev/s
Final angular speed of wheel, fw' = 2 rev/s
Let, final angular speed of person + stool, f' = ?
From angular momentum conservation, we have the formula
Iw * fw + Ip * f = Iw * fw' + Ip * f'
That gives, 5 * 4 + 20 * 0 = 5 * 2 + 20 * f'
20 = 10 + 20 * f'
20 * f' = 20 - 10
20 * f' = 10
f' = 10/20
f' = 1/2 or 0.5
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What are the main characteristics of Romanticism?.
The main characteristics of Romanticism are - Glorification of Nature ,Awareness and Acceptance of Emotions, Celebration of Artistic Creativity and Imagination, Emphasis on Aesthetic Beauty.
Popular in the late 18th and early 19th centuries, Romanticism was defined as the literary movement that emphasized the nature and the importance of the emotion and the artistic freedom.
The characteristics described as :
Glorification of Nature
Nature, in all its unbound glory, plays the huge role in the Romantic literature. Nature, sometimes seen just opposite of the rational, is a powerful symbol in work from this era.
Awareness and Acceptance of Emotions
A focus on emotion is one of the key characteristic of nearly all writing from the Romantic period.
Celebration of Artistic Creativity and Imagination
In contrast to the previous generations focus on reason, writers of the Romantic movement also explored the importance of the imagination and the creative impulse.
Emphasis on Aesthetic Beauty
Romantic literature also explores the theme of the aesthetic beauty, not just of the nature but of people as well. This was especially true when female beauty is described .
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tensile strength tests were carried out on two different grades of wire rod, resulting in the accompanying data. grade sample size sample mean (kg/mm2) sample sd aisi 1064 m
Tensile and flexural tests were done on two distinct grades of wire rod for the alternate and null hypotheses, yielding the data that is included.
What in a material is tensile?The term "tensile strength" describes how much strain or load a material can withstand before stretching and breaking. Tensile strength, as its name suggests, refers to a material's resistance towards tension brought on by external mechanical stresses.
We utilize tensile strength because?Ultimate tensile strength, sometimes known as simply "tensile strength," is a crucial attribute of materials that affects how well they operate mechanically. It is a material's capacity to withstand ripping brought on by stress. All forms of materials, including wires, harnesses, metal beams, etc., are covered by this characteristic.
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A scuba diver ascends too quickly and develops the bends. A nitrogen bubble has formed in the patient's elbow. At a depth of 61 ft, where the pressure is 2.85 atm, the bubble had a volume of 0.019 mL. Assuming a constant temperature and number of moles of nitrogen in the bubble, what volume did the bubble increase to at the surface, where the pressure is 1.00 atm? bubble volume at surface: mL The scuba diver is placed into a hyperbaric oxygen chamber where the pressure is 3.62 atm. What is the volume of this same nitrogen bubble while the patient is in the hyperbaric chamber? bubble volume in chamber: mL
Assuming that the nitrogen, which can and does dissolve in the blood, does not.
How much bigger did the bubble get at the surface?Boyle's law can be used to calculate the pressure times the volume under one set of conditions equals the pressure times the volume under the other set of conditionsAssuming that the nitrogen does not dissolve in the blood, which it can and does.To compute the volume under different circumstances, we shall set the value to equal p 1 v 1 over p 2 and not 2.70 atmospheres.The pressure at 56 feet was 2.70 atmospheres, and the bubble's volume was 0.018 milliliters; at 1 atmosphere, it would have been 0.0486 milliliters.This group of divers was subsequently placed in a hyperbaric oxygen room at 3.64 atmospheres.The nitrogen bubble's volume will remain unchanged.The volume of.018 milliliters is determined by the calculation of 2.70 atmospheres.In this case, 3.64 atmospheres will equal 0.0134 milliliters when we divide that by the new volume or the new pressure.This is assuming that the nitrogen doesn't dissolve into the blood under these extreme pressures, which it might.To more learn about Volume refer to:
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the current flow to a 120-volt load travels through the source (typically a transformer winding). assume this is a properly connected circuit.
The given statement is true, the current flow to the 120-volt load can travel properly in the connected circuit.
A critical observation to don't forget is that circuit breakers can most effectively take care of about 80% of their average amperage. meaning a fifteen-amp circuit breaker can manage around 12-amps and a 20-amp circuit breaker can cope with approximately sixteen amps.
The neutral includes the unbalanced load lower back to the supply. The grounded conductor is the only one that is deliberately grounded. within the maximum not unusual wiring systems for business flowers, industrial buildings, and home homes, the impartial is the deliberately grounded conductor.
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an ideal gas expands isothermally performing work in the process calculate the change in internal energy of the gas
Since the ideal gas' internal energy is only dependent on temperature, it does not change during the isothermal process. Heat exchanged equals work completed.
What is work?In physics, the term "work" refers to the energy that is moved to or away from an item whenever a force is exerted along a displacement. For a constant force that is directed in the same direction as the motion, it is simplest expressed as the product of the force's magnitude and the distance traveled. The work performed by a force is defined as the product of the component of the force operating in the direction of the displacement and the displacement's magnitude. Formula. Work can be calculated using the formula below by multiplying force by the distance traveled in the force's direction. W = F × d.
What is the nature of work?The term "nature of work" refers to the kinds of tasks and responsibilities that may be assigned to you at work. The caliber of the work might demonstrate your qualifications and place within a corporation. The type of work and the level of work may be listed as the job description and the job title, respectively, when you look at job openings.
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What are presidential checks and balances explain?.
Checks and balances refers to the separation of power in the government, which is ensured by the establishment of three distinct branches: the executive branch, the judicial branch, and the legislative branch, in the United States government.
What are the president's check and balances?A law can be vetoed by the President in the executive branch, but the legislative branch can override that veto with enough votes. The legislative branch can impeach the President and remove him or her from office, as well as approve Presidential nominations and control the budget.
Vetoes can be overridden by a two-thirds vote in Congress. The Senate has the authority to refuse confirmation of appointments or treaties. The Congress has the authority to impeach and remove the President.
There are three of them: legislative, judicial, and executive.
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Determine the magnitude of the initial vertical velocity of the projectile, viy, when the magnitude of its initial velocity, vi, was 40. meters per second. [1]
A projectile was fired with initial velocity of 40 m/s and at angle 30⁰ above the horizontal. Its initial vertical velocity is 20 m/s.
In a projectile motion, at a time instant t, the velocity v can be divided into its horizontal and vertical components: vx and vy. Let the projectile is fired at angle θ above the horizontal, then:
vx = v cos θ
vy = v sin θ
Where:
v = velocity at time instant t
Parameters given:
v = 40 m/s
θ = 30⁰
Hence, the vertical velocity is:
vy = v sin 30⁰
= 40 . 1/2 = 20 m/s
Complete question:
Determine the magnitude of the initial vertical velocity of the projectile, vy, when the magnitude of its initial velocity, v, was 40. meters per second and the angle is 30⁰ above the horizontal.
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you are performing an analysis of a new metalic alloy created in your research lab. you place a 48.1 kg block of this new metal initially at a temperature 12 oc in a rigid insulated box. 0.29 kg of steam at 119 oc is piped into the box and then the box is sealed so that no heat can be transferred in or out. when the system comes to equilibrium, the temperature is 69 oc.
Mass of the metal, m = 0.20 kg = 200 g
Initial temperature of the metal, T₁ = 150° C
Final temperature of the metal, T₂ = 40° C
Calorimeter has water equivalent of mass, m = 0.025 kg = 25 g
Volume of water, V = 150 cm³
Mass (M) of water at temperature T = 27° C
150 x 1 = 150 g
Fall in the temperature of the metal:
ΔT(m) = T₁ - T₂ = 150 - 40 = 110°C
Specific heat of water, C(w) = 4.186 J/g/K
Specific heat of the metal = C
Heat lost by the metal, = mCT ------ eq 1
Rise in the temperature of the water and calorimeter system:
T₁ - T₂ = 40 - 27 = 13°C
Heat gained by the water and calorimeter system:
m₁C(w)T = (M + m) C(w) T ----------- eq 2
Heat lost by the metal = Heat gained by the water and colorimeter system:
mCΔT(m) = (M + m)C(w)T(w)
200 x C x 100 = (150 + 25) x 4.186 x 13
C = 0.43 J/g/K
Therefore, if some heat is lost to the surroundings, then the value of C will be smaller than the actual value.
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which of the following scenarios represents kinetic energy transforming into potential energy?
A ball being tossed directly upward before reaching its highest point.
An acorn falling from a tree.
A person walking at a constant velocity along a perfectly flat path.
A high jumper reaching the peak of their jump.
A roller coaster dropping from its highest point.
A high jumper reaching the peak of their jump and A ball being tossed directly upward before reaching its highest point represents kinetic energy transforming into potential energy.
What is the kinetic energy and potential energy?Kinetic energy (K.E.) can be described as the energy contained by a moving object due to its motion. The change in the kinetic energy of a moving body is equal to the work done.
The kinetic energy (K.E.) of a moving object can be written as:
K.E = ½mv² where ‘m’ is the mass, ‘v’ is the velocity of the object.
Potential Energy (P.E) can be defined as the energy that is stored by an object due to its position and is equal to P.E = mgh where ‘m’ is the mass, ‘g’ is the gravitational acceleration and ‘h’ is the height (in m).
The kinetic energy of the ball and the jumper is maximum at the ground and their kinetic energy changes into potential energy as they are moving toward the highest point.
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