Work is said to be done when the displacement of the object is in the direction of the applied force. Its dimension formula is [ML²T⁻²].
Work is defined as the product of force vector and displacement vector. It is a scalar quantity. The work on an object is said to be done when the object gets displaced to a certain distance in the direction of the applied force.
W = F × d × Sinθ
Where F is the force, d is the distance, θ is the angle between the force and the distance. Its dimension formula is [MLT⁻²] × [L] = [ML²T⁻²]. Hence the correct option is b.
--The given question is incomplete, the complete question is:
"What is the dimensional formula for work? a) {MLT⁻²] b) [ML²T⁻²] c) [ML⁻²T⁻²] d) [M⁻¹L³T⁻²] "
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The ratio of elements in the molecular compound ethyl alcoholic is: carbon,2; hydrogen, 6; oxygen, 1. Which is the formula for this compound?
Answer:
The answer is C2H60 hope this helps.
Explanation:
Is magnitude equal to direction?.
The magnitude doesn't equal to direction. The magnitude of the vector is its length, while the direction indicates which way the vector points.
The answer to "how much?" is magnitude, and the answer to "which way?" is direction. 5 meters is a magnitude, and North is a direction. The vector quantity 5 meters north has both magnitude and direction. Some quantities in physics (known as vector quantities) are affected by their orientation, but others are not (called scalar quantities).
For example, if a friend is throwing a party and you need directions, knowing 5 miles isn't enough; you also need to know which direction to travel. If, on the other hand, you're bringing juice to the party and she tells you to bring 10 bottles, that's all the information you need; the amount of juice doesn't need to be specified.
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Complete the sentence by putting a cross () in the box next to your answer.
The work done by the brakes during braking is equal to
A the energy transferred
B the stopping distance
C the acceleration
D the thinking distance plus braking distance
Answer:
I hope its this one
A the energy transferred ()
lenore is on an inclined plane next to her truck. holding her hands steady, she pushes a box up the plane and into her truck. where can energy be lost?
The energy can be lost in the of heat energy, kinetic energy and potential energy. If lenore pushes a box up the plane and into her truck.
First of all "energy lost" is an inappropriate word used here. Energy can neither be lost nor be generated. It only transforms from one form to another.
The plane on which the box is being pushed up is inclined. There are different types of energy transformation takes places. Firstly muscular force and thereby energy is transfer to the kinetic energy, then this kinetic energy gets transfer partially into heat energy and partially into potential energy. Heat energy is generated due to the friction of the inclined surface, and potential energy is generated due to the height of the box above ground surface.
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A wheel is turning at -2. 00 rad/s.
After 8. 25 s, it has a displacement
of +7. 25 rad. What was its angular
acceleration?
(Unit rad/s^2)
Remember: CCW is +, CW is -. 1 rev = 2*pi rad
The angular acceleration of the turning wheel that has a displacement of 7.23 rad is 0.27 rad/s².
The term "angular acceleration" refers to the rate at which the angular velocity of an item changes over time in rotational motion. It is a way to gauge how quickly an object's rotational motion is accelerating or decelerating. Similar to linear acceleration, which depicts variations in linear velocity, is angular acceleration.
Given:
Angular speed, ω = -2 rad/s
Time, t = 8.25 s
Angular displacement, θ = 7.25 rad
The angular acceleration is given by:
θ = ω + ¹/₂αt²
7.25 = -2 + ¹/₂ (α) (8.25)²
7.25 = -2 + 34.03α
34.03α = 9.25
α = 9.25 / 34.03
α = 0.27 rad/s²
Hence, the angular acceleration of the turning wheel that has a displacement of 7.23 rad is 0.27 rad/s².
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a form of energy conversion that captures heat energy from within Earth
A form of energy conversion that captures heat energy from within Earth is Geothermal Energy.
Geothermal energy is heat energy from the earth—Geo (earth) + thermal (heat). Geothermal resources are reservoirs of hot water that exist or are human made at varying temperatures and depths below the Earth's surface. Geothermal energy is the thermal energy in the Earth's crust which originates from the formation of the planet and from radioactive decay of materials in currently uncertain but possibly roughly equal proportions. Geothermal energy is a type of renewable energy taken from the Earth's core. It comes from heat generated during the original formation of the planet and the radioactive decay of materials. This thermal energy is stored in rocks and fluids in the centre of the earth.
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Once cleared for takeoff the jet began to accelerate from rest to high speed along the level runway the potential energy is: decreasing or is constant?
The two examples given above serve to highlight the two types of potential energy that will be covered in this course: elastic potential energy and gravitational potential energy.
What is Potential energy?The energy that an object stores as a function of its height or vertical position is known as gravitational potential energy.
Because of the Earth's gravitational pull on the object, the energy is captured. The mass of the ball and the height to which it is raised both affect the gravitational potential energy of the huge ball of a demolition machine.
The mass of an object and its gravitational potential energy are directly related. Objects with more mass have more gravitational potential energy.
Therefore, The two examples given above serve to highlight the two types of potential energy that will be covered in this course: elastic potential energy and gravitational potential energy.
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a 12 v battery is connected to two resistors in series, r1 and r2. the voltage across r1 is 7 v. what is the voltage across r2?
The voltage across R2 calculated by taking the difference is 5 V.
We know that the total voltage of a battery is equal to the sum of the voltages across each resistor in a series circuit.
Voltage =Vr1 + Vr2
Voltage = 12 V
Voltage across R1 = 7 V
Therefore,
Voltage across R2 = Voltage - Voltage across R1
Voltage across R2 = 12 V - 7 V = 5 V
It's important to note that in a series circuit, the same current flows through each resistor. Therefore, the voltage across each resistor is inversely proportional to its resistance. In other words, the resistance of R2 is greater than R1, so the voltage across R2 is less than the voltage across R1.
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Help with number 3 Please!! i’d greatly appreciate it
Answer: You can not see it!
Explanation:
what is created when light is refracted in a rainstorm?
Answer: It form Rainbow
What is Rainbow ?
--A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.
-- It takes the form of a multicoloured circular arc.
What is Refraction ?
-- Rainbows are formed when light from the sun is scattered by water droplets (e.g. raindrops or fog) through a process called refraction.
--Refraction occurs when the light from the sun changes direction when passing through a medium denser than air, such as a raindrop.
What is reflection?
--The return of light or sound waves from a surface. :
--the production of an image by or as if by a mirror.
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What is ballistic stretching and example?.
You stretch or "warm up" by bouncing into (or out of) a stretched position while using the expanded muscles as a spring to pull you out of the stretched position.
Bouncing down repeatedly to your toes, for instance is a kind of stretching is regarded as unhealthy and injury-prone. On the cartridge case and bullet, the firing of a projectile by a gun leaves minute traces. They have a look similar to ballistic fingerprints.
In order to achieve a broader range of motion than is often attainable with routine dynamic or static stretching, ballistic stretching seeks to push your muscles past the point of reflexive control. The time limit for ballistic stretches is the same as for any other type of stretching.
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What do you call the process of escaping molecules from the surface of a liquid at any temperature?.
The process of escaping molecules from the surface of a liquid at any temperature is known as Evaporation.
When a liquid turns into a gas, this is referred to as evaporation. In these examples, the liquid water is evaporating into a gas known as water vapour rather than disappearing.
On a global scale, evaporation occurs. Evaporation, along with condensation and precipitation, is one of the three major steps in the Earth's water cycle. Evaporation accounts for 90% of the moisture in the Earth's atmosphere, with plant transpiration accounting for the remaining 10%.
Matter exists in three states that is solid, liquid and gaseous state. Evaporation is just one way for a substance, such as water, to transition between these states.
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A brick i liding to the right on a horizontal urface. What are ome direction of the two urface force the friction force of the normal force
The two surface forces acting on the brick would be the friction force and the normal force.
What is surface?Surface is a term used to describe the physical outer layer of an object or material. It can refer to the visible top layer of soil in a garden, the outside of a plant, an animal's skin, the outer layer of a building, or the exterior of a vehicle. In the world of science, the term surface can refer to the outermost layer of a solid object or material, the boundary layer where the properties of the material change abruptly. Surface can also refer to a surface area, which is the total area of a two-dimensional object. Surface area is important because it affects the amount of heat, light, or sound that is absorbed, reflected, or transmitted.
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PLOT A GRAPH OF L AGAINST T² AND DETERMINE THE SLOPE
The measured value of g is determined by the slope of the time period T² vs. l graph (acceleration due to gravity).
Time period the amount of time that a behavior lasts or a condition persists. Depending on the type of activity or situation under consideration, it may be measured in seconds or in millions of years.
the duration T as determined by the formula T = 2π √(l/g). The pendulum's length, l, is indicated here.
The result of squaring both sides is T² = 4π² l/g
42 and g are constants, thus
⇒ T² = ml
The slope of the T² vs l graph in this case is m. The slope's value is m = 4π²/g
We can determine the value of g from the slope of the graph by substituting π = 10 in the equation above.
g = 40/m
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PART ONE
A merry-go-round rotates at the rate of 0.24 rev/s with an 71 kg man standing at a point 2.7 m from the axis of rotation.
What is the new angular speed when the
man walks to a point 1 m from the center?
Consider the merry-go-round is a solid 79 kg cylinder of radius of 2.7 m.
Answer in units of rad/s.
PART TWO
What is the change in kinetic energy due to this movement?
Answer in units of J.
Answer:
In order to answer this correctly I will need the answers to the question
Explanation:
I can then work it out and give you the best answer I can give you
Where is the kinetic energy of a roller coaster at its highest answer?.
The kinetic energy of a roller coaster is at its highest at the bottom of the drop, the lowest position. This can be explained by the conservation of energy.
What is law of conservation of energy?The principle of conservation of energy states that "The total energy is neither increased nor decreased in any process. Energy can be transformed from one form to another, and transferred from one object to another, but the total amount remains constant."
In the same way, the Conservation of Mechanical Energy states that the total mechanical energy of a system is conserved. It can be expressed as
E₁ = E₂
½mv₁ + mgh₁ = ½mv₂ + mgh₂
Where
E₁ = mechanical energy at point 1E₂ = mechanical energy at point 2m = mass of an objectv₁ = velocity of object at point 1v₂ = velocity of object at point 2h₁ = height of object at point 1h₂ = height of object at point 2At the lowest position of a roller coaster, the height is zero. If we count the energy change from the highest position where the velocity is zero, we get the equation
½mv₁ + mgh₁ = ½mv₂ + mgh₂
½m(0) + mgh₁ = ½mv₂ + mg(0)
mgh₁ = ½mv₂
U₁ = KE₂
There is only kinetic energy at the lowest position of the roller coaster.
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What is the volume of the sphere? 12 centimeters cubed 24 centimeters cubed 36 centimeters cubed 54 centimeters cubed.
The volume of the sphere is 41.89 centimeters cubed.
What is sphere?A sphere is a three-dimensional shape that is made up of all points that are the same distance from the center. It is a perfectly round, symmetrical object that looks the same from any angle. A sphere is one of the most basic shapes in geometry and is found in many everyday objects. A soccer ball, basketball, and even a globe are all examples of spheres. The surface of a sphere is called a spherical surface and has no edges or vertices.
The volume of a sphere is calculated using the formula V = 4/3 * π * r^3, where r is the radius of the sphere. In this case, the radius of the sphere is 12 centimeters, so the volume would be 4/3 * π * 12^3 = 4,188.8 cubic centimeters, which is equivalent to 41.89 cubic centimeters. Therefore, the answer is 41.89 centimeters cubed.
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Silver has two stable isotopes, 107ag and 109ag. The isotopic mass of 107ag is 106. 9051, and the isotopic mass of 109ag is 108. 9047. The atomic weight of silver, from the periodic table, is 107. 9418. What is the percent abundance of 109ag (enter to 2 decimal places)?.
The percent abundance of 109Ag is calculated by finding the ratio of the mass of 109Ag to the total mass of silver, and multiplying the result by 100. The percent abundance of 109Ag is 0.5034 × 100 = 50.34%.
What is the calculated ?The calculated answer is based on the data that is provided and the formula or equation used to calculate it. Depending on the complexity of the problem, this answer could be a single number, multiple numbers, a graph, a chart, or even a written response.
The percent abundance of 109Ag is calculated by finding the ratio of the mass of 109Ag to the total mass of silver, and multiplying the result by 100.
The total mass of silver is the sum of the masses of both isotopes: 106.9051 + 108.9047 = 215.8098
The mass of 109Ag is 108.9047, so the ratio of the mass of 109Ag to the total mass of silver is 108.9047/215.8098 = 0.5034
The percent abundance of 109Ag is 0.5034 × 100 = 50.34%.
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A wave in which particles of the medium undergo a circular motion is known as a blank wave.
A. Longitudinal
B. Pitch
C. Standing
D.Trasverse
None of the above is right option for the same. A wave in which particles of the medium undergo a circular motion is known as a Surface wave.
A surface wave is a wave in which the medium's particles move in a circular pattern. Surface waves are neither transverse nor longitudinal. All of the particles in the bulk of the medium travel parallel to and perpendicular to the direction of energy transport in longitudinal and transverse waves, respectively.
Only the particles at the medium's surface move in a circular motion during a surface wave. As one moves farther away from the surface, the mobility of the particles tends to slow down.
Every wave that travels across a medium has its origin. One of the particles was initially displaced somewhere along the medium.
It is typically the first coil on a slinky wave that is moved by a person's hand. The first air particle to vibrate during the creation of a sound wave is often caused by the vocal chords or a guitar string. The particles that are displaced from their equilibrium position at the point where the wave is introduced into the medium always move in the same direction as the vibration's source.
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Missy diwater, the former platform diver for the ringling brother's circus, had a kinetic energy of 12 000 j just prior to hitting the bucket of water. If missy's mass is 40 kg, then what is her speed?.
Missy diwater, the former platform diver for the ringling brother's circus, had a kinetic energy of 12 000 j just prior to hitting the bucket of water. If Missy's mass is 40 kg, then her speed is: 24.49 m/sec
What is kinetic energy?The energy of motion, or kinetic energy, may be seen in the movement of an item or subatomic particle. Kinetic energy can be discovered in every moving object and particle. Kinetic energy is generated when anything moving, such as a person walking, a baseball rising through the air, a piece of food dropping from a table, or a charged particle in an electric field. The object's squared velocity determines the kinetic energy. As a result, an object's kinetic energy quadruples when its velocity doubles. Kinetic energy is divided into five kinds radiative, thermal, sound, electrically, and mechanic.
Given that,
kinetic energy = 12000 J
m = mass = 40 kg
v = velocity m/s
Kinetic energy of an object can be expressed in terms of its mass m and velocity v as:
K.E = 1/2 × m × v²
or, 12000 = 1/2 × 40 × v²
or, v² = 600
or, v = √600
or, v = 24.49 m/sec
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How much work must be done to stop a 1215 kg car moving at 100 km/h in a straight path?
Answer:
Work done = 466.128 KJ
Explanation:
We can solve this question using the work-energy theorem
Given,
Velocity = 100km/hr = 27.7 m/s (Approx)
Mass = 1215 kg
Initial velocity = 0
Work done = 1/2 m[tex](v-u)^{2}[/tex]
= 1/2*1215 * 27.7*27.7
= 466.128 KJ
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What are the two types of rate laws?.
Rate laws can be represented as a differential rate law, which describes the change in reactant or product concentrations as a function of time, or as an integrated rate law, which describes the actual concentrations of reactants or products as a function of time.
What is the distinction between differential and integrated rate law?The differential rate law describes how the rate of a reaction varies with the concentration of the reactant (s). The integrated rate law describes how the concentration of the reactant(s) changes over time.
Integration of the relevant differential rate laws yields integrated rate laws. The rate constants for those rate laws are calculated using concentration measurements taken at various points throughout the process.
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What is the SI unit of power Mcq?.
The SI unit of power is watt.
In physics, power is the amount of energy transferred or converted per unit of time. In the International System of Units, the unit of power is the watt, which is equivalent to 1 joule per second. In older works, force is sometimes called activity. Power is a scalar quantity.
Performance is how fast work gets done. P = gravimetric power The SI unit is Watt W, where 1 Watt equals 1 Joule/second (1W=1J/s). Since work is energy transfer, power is also the rate at which energy is consumed. For example, a 60 W light bulb consumes 60 J of energy per second.
Watt (abbreviated W) is the International System of Units (SI) standard unit of power (energy per unit time), equivalent to 1 joule per second. Watts are used to indicate the rate at which electrical energy is dissipated, or electromagnetic energy is radiated, absorbed, or dissipated.
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Determine the magnitude of the resultant force. Express your answer to three significant figures and include the appropriate units.
Subtract the greater force's magnitude from the smaller force's magnitude to determine the resultant force. The smaller force's direction and the resultant force's direction are same.
How big is it, exactly?Magnitude typically refers to a size or a distance. We can relate magnitude to the movement by comparing the size and motion speed of the thing. The object's or quantity's size determines its magnitude.
What magnitude instances are there?Size is referred to as magnitude. A automobile is traveling more quickly than a bike, for instance, when it comes to speed. In this case, the car is moving faster than the bike by a larger margin. It reveals the direction or size, whether absolute or relative, in which an object moves.
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A physics demo launches a ball horizontally while dropping a second ball vertically at exactly the same time.
Both the balls hit the ground at the same time because their initial velocity( = 0) & acceleration towards the ground is same(g = 9.8m/s²)
What is acceleration?The measurement of change in an object's velocity is known as acceleration. When you press the gas pedal in a car, it surges forward at an increasing rate. Acceleration is the change in velocity.
The formula for calculating acceleration is as follows:
Acceleration = (Velocity Change)/ (change in time)
The standard unit of acceleration measurement is metres per second squared (m/s2). This is calculated using the above formula, where velocity is measured in metres per second and time is measured in seconds.
In physics, acceleration has both a magnitude (the m/s2 number we discussed earlier) and a direction. As a result, acceleration is now a vector.
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Complete question:
A physics demo launches a ball horizontally while dropping a second ball vertically at exactly the same time. [Delayed Feedback] 1) Which ball hits the ground first?
How does the concentration gradient of h+ ions help to make ATP?.
Through ATP synthase, the hydrogen ions return down the gradient of their concentration. This causes the subunits to spin and generates the energy required for the fusion of ADP and inorganic phosphate to produce ATP.
In order to move hydrogen ions from the matrix into the intermembrane gap via the mitochondrial inner membrane during electron transport, energy is required. Through the action of ATP synthase, hydrogen ions move back across the mitochondrial membrane and into the matrix as a result of a chemiosmotic gradient, producing ATP.
A H+ accumulation occurs in the inner membrane space of the mitochondria as a result of the electrons from NADH and FADH2 moving through the electron transport chain. The membrane enzyme complex ATP synthetase receives its direct energy for ATP production from the proton gradient (gradient of H+) that flows through it.
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Is momentum infinite in space?.
As a result, there is almost no friction in space to slow moving objects. A ship in space, unlike a ship on the water, does not require constant thrust to keep moving forward. After the engines are turned off, the momentum of a space ship will continue to propel it forward indefinitely at a constant speed.
What is momentum?Momentum is defined as a body's amount of motion. It is measured by "mass velocity," since velocity and the direction of the body's motion impact momentum. Momentum is a vector quantity since velocity is a vector and mass is a scalar variable. Momentum is defined as the product of mass and velocity. Momentum is a body's "power" while it moves, indicating how much force it can exert on another. A bowling ball (large mass) traveling slowly (low velocity), for example, can have the same momentum as a baseball (small mass) thrown quickly (high velocity).
Here,
As a result, almost no friction exists in space to slow moving objects. Unlike a ship on the water, a ship in space does not require constant thrust to keep moving forward. After the engines are turned off, a space ship's momentum will continue to propel it forward at a constant speed indefinitely.
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A car accelerated to 10m/2 after being rear-ended by a truck. The car and it occupant have a ma of 1300kg. How much force did the truck place on the Uber car?
Therefore, the truck placed 6500 Newtons of force on the Uber car after rear-ending it.
What is the force ?Force is an influence that causes an object to undergo a certain change. It can be described as a push or pull, which can cause an object to start moving, stop moving, speed up, slow down, or change direction. Forces can be caused by many different types of interactions, including those between objects, between objects and fields, and between fields. Examples of forces include gravity, friction, magnetism, and electric forces. Forces are measured in Newtons (N).
The force placed on the Uber car can be calculated using Newton's Second Law of Motion, which states that force is equal to mass times acceleration (F = ma).
In this example, the force placed on the Uber car can be calculated as follows:
Force = Mass x Acceleration
Force = 1300 kg x 10m/2
Force = 6500 N
Therefore, the truck placed 6500 Newtons of force on the Uber car after rear-ending it.
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Write a paragraph describing three characteristics that scientists can use to classify stars using the terms "main sequence, spectrum, and light year".
The terms "main sequence, spectrum, and light year" are discussed here.
What are main sequence, spectrum, and light year?
Any star with a hot, dense core that burns hydrogen into helium to produce energy is said to be in the main sequence. The majority of stars in the galaxy are main-sequence stars, including the Sun, Tau Ceti, and Alpha Centauri A.
The temperature, chemical make-up, and inherent luminosity of a star are all revealed in the spectrum. A series of photos taken at different wavelengths of the slit in the star's light make up spectrograms obtained with a slit spectrograph.
The distance light travels in a year is measured in light-years.
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How did anders celsius devise the temperature scale?
Anders celsius devise the temperature scale using a mercury thermometer.
The Celsius temperature scale, which measures heat or cold, from 0° for frozen water, to 100° for boiling water, was invented by Anders Celsius, a Swedish astronomer, in 1742. He named the scale the centigrade scale, and people may occasionally still see temperatures listed with this term. In 1954, however, scientists officially named the temperature scale after the astronomer to honor his work.The original scale differs from the modern use of Celsius. The creator set 0 as the boiling point of water and 100 as its freezing point. This was reversed shortly after his death to the more modern usage.One of the advantages of the modern scale is that the calculations from 0 to 100 are far easier than Fahrenheit calculations.In modern times, most countries use Celsius measurements, not simply for the weather, but for temperature measurements in baking and other applications. Scientists throughout the world use a combination of this scale and Kelvin measurements. The Kelvin scale is based on the fixed points of absolute zero, where nothing could be colder, and all matter solidifies, and the triple point of water, where gas, liquid and solid water are equally used. This scale is particularly useful for discussing extreme temperatures.To know more about temperature visit:
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