A cup of hot tea has _____________ energy. some of this thermal energy is ____________ to the particles in cold milk, in which you put to make the coffee cooler.
Answers
A cup of hot tea has thermal energy. some of this thermal energy is kinetic energy to the particles in cold milk, in which you put to make the coffee cooler.
During conduction, the particles in the hot tea transfer their energy to the particles in the cold milk through collisions, causing the particles in the milk to vibrate more rapidly and move more quickly. This increase in kinetic energy of the milk particles leads to an increase in temperature, causing the milk to warm up and the tea to cool down until they reach thermal equilibrium, where they are at the same temperature.
Thermal energy is the energy that is associated with the temperature of an object or a system. It is the sum of the kinetic energy of the particles that make up the object or system, as well as the potential energy of the particles due to their relative positions and interactions. The higher the temperature of an object or system, the greater its thermal energy.
When a hot object comes into contact with a cooler object, heat flows from the hotter object to the cooler object until they reach thermal equilibrium, where they are at the same temperature. This heat transfer occurs through one or more of the three modes of heat transfer - conduction, convection, and radiation.
In the case of adding cold milk to hot tea, the heat transfer occurs through conduction. Conduction is the transfer of heat through a material or between materials that are in contact with each other. In this case, the hot tea and the cold milk are in contact with each other, and the heat flows from the hotter tea to the cooler milk through collisions between the particles in the two materials. This collision causes the milk particles to vibrate more rapidly and move more quickly, increasing their kinetic energy and temperature.
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Related Questions
Before Collision:
2,000 kg 4 m/s 4,000kg 0 m/s
After collision: 2,000 kg + 4,000kg Vt = ?
I will give Brainliest to the first person. Please show work
Answers
Answer:
4/3 m/s
Explanation:
Assuming momentum is conserved, the sum of products of mass and speed before the collision is the same as after:
(2000 kg)(4 m/s) +(4000 kg)(0 m/s) = (2000 +4000 kg)(Vt)
Vt = (8000 kg·m/s)/(6000 kg) = 4/3 m/s
The speed of the combined objects after the collision is 4/3 m/s.
Which Energy is missing in the windmill energy transformation?
Wind> _________> Electrical
1.Solar
2.Light
3.Mechanical
4.Sound
Answers
Answer:
3.mechanical is the answer
Mechanical energy is missing in the windmill energy transformation.
Wind> Mechanical> Electrical. Hence option (3) is correct.
What is Wind energy?The process of using the wind to produce mechanical or electrical energy is known as wind power or wind energy. The kinetic energy of the wind is transformed into mechanical power by wind turbines. This mechanical energy can be used to particular activities (such pumping water or grinding grain) or can be transformed into electricity by a generator.
When the project size is created to match the energy requirements of the load while simultaneously monetizing economies of scale and equipment track record, wind turbine economics are maximized. A modest turbine (usually less than 10 kW) that can produce the amount of electricity needed by a residence for daily operation is needed for residential onsite energy consumption.
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Why does the plane, tied on a string onto the ceiling, move in a horizontal circle, and why doesn’t the plane move up and down?
Answers
Answer:
There’s a tangential velocity and centripetal force. The object moves in a circle because it’s falling towards the center of the circle (point directly under string) but the velocity is such that the object never gets closer to the center
Explanation:
as measured in earth's rest frame, a spaceship traveling at 0.9640c takes to travel between two planets that are not moving relative to each other. how long does the trip take as measured by someone on the spaceship? a. 2.79 y b. 6.83 y c. 39.5 y d. 28.8 y
Answers
b) 6.83 years, which corresponds to approximately 2.165 years as measured by someone on the spaceship.
According to special relativity, time dilation occurs when an object is moving relative to an observer. Time dilation means that time appears to pass more slowly for the moving object compared to a stationary observer.
In this scenario, the spaceship is traveling at a speed of 0.9640c, which is 0.9640 times the speed of light. We want to find out how long the trip takes as measured by someone on the spaceship, which means we need to consider time dilation.
The time dilation factor, γ, is given by the equation:
γ = 1 / √(1 - (v^2 / c^2))
where v is the velocity of the spaceship and c is the speed of light.
Substituting the given values:
γ = 1 / √(1 - (0.9640c)^2 / c^2)
= 1 / √(1 - 0.9298)
= 1 / √(0.0702)
≈ 3.160
This means that time appears to pass approximately 3.160 times slower for someone on the spaceship compared to someone in the Earth's rest frame.
Now, let's consider the time it takes for the trip in the Earth's rest frame. We'll denote this time as t_earth.
Given that the spaceship takes t_earth to travel between the two planets as measured in the Earth's rest frame, the time it takes for someone on the spaceship, t_ship, can be calculated by:
t_ship = t_earth / γ
Substituting the provided answer options:
a) t_earth = 2.79 years
t_ship = 2.79 years / 3.160 ≈ 0.883 years
b) t_earth = 6.83 years
t_ship = 6.83 years / 3.160 ≈ 2.165 years
c) t_earth = 39.5 years
t_ship = 39.5 years / 3.160 ≈ 12.50 years
d) t_earth = 28.8 years
t_ship = 28.8 years / 3.160 ≈ 9.13 years
Based on the calculations, the correct answer is option b) 6.83 years, which corresponds to approximately 2.165 years as measured by someone on the spaceship.
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A sample contains 20 kg of radioactive material. The decay constant of the material is 0.179 per second. If the amount of time that has passed
is 300 seconds, how much of the of the original material is still radioactive? Show all work
Answers
Answer:
There are \(9.537\times 10^{-23}\) kilograms of radioactive material after 300 seconds.
Explanation:
From Physics we know that radioactive materials decay at exponential rate, whose differential equation is:
\(\frac{dm}{dt} = -\lambda\cdot m\) (1)
Where:
\(\frac{dm}{dt}\) - Rate of change of the mass of the radioactive material, measured in kilograms per second.
\(m\) - Current mass of the radioactive material, measured in kilograms.
\(\lambda\) - Decay constant, measured in \(\frac{1}{s}\).
The solution of the differential equation is:
\(m(t) = m_{o}\cdot e^{-\lambda\cdot t}\) (2)
Where:
\(m_{o}\) - Initial mass of the radioactive material, measured in kilograms.
\(t\) - Time, measured in seconds.
If we know that \(m_{o} = 20\,kg\), \(\lambda = 0.179\,\frac{1}{s}\) and \(t = 300\,s\), then the initial mass of the radioactive material is:
\(m(t) = (20\,kg)\cdot e^{-\left(0.179\,\frac{1}{s} \right)\cdot (300\,s)}\)
\(m(t) \approx 9.537\times 10^{-23}\,kg\)
There are \(9.537\times 10^{-23}\) kilograms of radioactive material after 300 seconds.
A car slows down from 95m/s to 50m/s in 3 seconds. What is its acceleration?
Answers
Answer:
4.17
Explanation:
We started at 95 and went down to 50 in 3 seconds.
The change in volocity would be about -45 km
distance traveld maybe 60
And power around 83.9 kw
I might be wrong so im sorry if I am.
I have not done this in a while.
15 m/s
Explanation:
The formula for acceleration is
Final Velocity - Initial Velocity then divide by your time
Plug in your numbers
50-95= -45 divide by your time
-45/3= -15
But your acceleration can’t be negative so it would be
15m/s
The other name for 'net force' is 'unbalanced force'. What is the name of the force that could be applied to an object that would balance a net force and create a state of equilibrium?
Answers
Answer:
Since these two forces are of equal magnitude and in opposite directions, they balance each other. The book is said to be at equilibrium. There is no unbalanced force acting upon the book and thus the book maintains its state of motion. When all the forces acting upon an object balance each other, the object will be at equilibrium; it will not accelerate.
Explanation:
Dorothy and her friends hear boisterous laughter from behind the rocks in the wonderful wizard of oz. the word boisterous means:____.
Answers
Dorothy and her friends hear boisterous laughter from behind the rocks in the wonderful wizard of oz. the word boisterous means: Full of energy; noisy; exuberant
ExuberantAn exuberant personality, uncontrolled or ornate especially in style, flamboyant exuberant architecture, generated in great quantities, and abundant exuberant greenery and plants are all examples of adjectives that are joyfully unrestrained and enthusiastically exuberant. The adjective exuberant, which was derived from a Latin term that originally denoted an abundance of milk coming from a cow or goat's udder, is where the noun exuberance gets its name. The name still means "overflowing," but not with milk but rather with happiness and zeal. full of life; highly jubilant and active. Exuberant health: very good; abundant; overflowing. Exuberant vegetation is one that is prolific in growth or output.
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What phenomenon is created by two tuning forks, side by side, emitting frequencies, which differ by only a small amount? a. resonance c. the Doppler effect b. interference d. beats
Answers
The phenomenon created by two tuning forks, side by side, emitting frequencies which differ by only a small amount is called (d) beats. This phenomenon is a result of the interference of sound waves produced by the two tuning forks.
When two sound waves with slightly different frequencies meet, they interfere with each other, causing a periodic variation in sound intensity. This variation in sound intensity is perceived as a beat frequency. The beat frequency is equal to the difference between the frequencies of the two tuning forks.
The closer the frequencies of the two tuning forks are to each other, the slower the beat frequency will be. As the frequency difference between the two tuning forks increases, the beat frequency will become faster.
The phenomenon of beats has many practical applications. One of the most common applications is in music. Musicians use beats to tune their instruments. By listening to the beats produced by two tuning forks, they can adjust the pitch of their instrument to match the desired frequency.
Beats are different from other sound phenomena, such as resonance and the Doppler effect. Resonance occurs when an object vibrates at its natural frequency in response to an external stimulus. The Doppler effect is the change in frequency of a wave in relation to the observer's motion.
In conclusion, the phenomenon created by two tuning forks, side by side, emitting frequencies which differ by only a small amount is called beats. This phenomenon is caused by the interference of sound waves produced by the two tuning forks and has practical applications in music and acoustics. Beats are different from other sound phenomena such as resonance and the Doppler effect.
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What is the period of a satellite in a circular orbit just above the surface of the Moon? The Moon’s mass is 7.36 × 1022 kilograms and its radius is 1.738 × 106 meters.
Answers
Answer:
F / m = a = G M / R^2 formula for gravitational attraction
a = ω^2 R formula for centripetal force for an object with radius R
G M / R^2 = ω^2 R equating accelerations
ω = (G M / R^3)^1/2
ω = 2 pi f = 2 pi / P for circular motion
P = 2 pi (R^3 / (G M))^1/2
R^3 / (G M) = (1.738E6)^3 / (6.67E-11 * 7.36E22) = 1.07E6
P = 6.28 * 1034 sec = 6500 sec = 1.80 hrs
Find the temperature of an ideal gas being quasi-statically compressed by 700 j of work to one-third of its initial volume
Answers
The temperature of an ideal gas being quasi-statically compressed by 700 j of work to one-third of its initial volume can be found using the first law of thermodynamics, which states that the change in internal energy of a system is equal to the work done on the system plus the heat added to the system.
Since the gas is considered ideal, the heat added is assumed to be zero. Therefore, the change in internal energy is simply equal to the work done, which is 700 j. Since internal energy is proportional to temperature, the temperature of the gas can be found by dividing the work done by the gas's specific heat capacity.
The temperature will increase as the gas is compressed, and the final temperature can be determined by multiplying the initial temperature by the ratio of the final volume to the initial volume. In this case, the final temperature would be three times the initial temperature.
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the most popular theory for the origin of the moon today is ________.
Answers
The most popular theory for the origin of the moon today is the giant impact hypothesis.
According to this theory, the moon was formed from debris that was ejected into space when a Mars-sized object collided with the early Earth about 4.5 billion years ago. The debris from the impact eventually coalesced to form the moon.
This theory is supported by several lines of evidence, including the similarity in the isotopic compositions of the Earth and moon, the moon's relatively low density, and the fact that the moon is depleted in volatile elements.
The giant impact hypothesis is also consistent with our understanding of the formation and evolution of the solar system, as it explains why the moon is so different from other objects in the solar system that formed through other processes.
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Help me plzzz I need answers
Answers
Answer:
i think it is B
Explanation:
A kilowatt-hour is a unit of
1. force
2. power
3. work
4. voltage
5. current
6. None of these
7. torque
(I tried 2 and 6, but they were both wrong :( )
Answers
Answer:
option 4 is the correct answer
.
A .63 kg ball is moving at 4.3m/s. What is the momentum of the ball?
Answers
Answer:
Given Mas (m) =63kg
velocity (v) =4.3m/s
momentum (p) =?
p=mv
63kgx4.3m/s
270.9kg.m/s
the momentum =270.9kg.m /s
If a ball of mass 0.63 kilograms is moving at 4.3 meters/seconds, then the momentum of the ball would be 2.709-kilogram meters/second.
What is momentum?It can be defined as the product of the mass and the speed of the particle, it represents the combined effect of mass and the speed of any particle.
Momentum = mass of the object × velocity of the object
As given in the problem we have to calculate the momentum of the ball if it has a mass of 0.63 kilograms and moving with a speed of 4.3 meters/seconds,
The momentum of the ball = 0.63× 4.3
=2.709 kilogram meters/second
Thus, the momentum of the ball comes out to be 2.709-kilogram meters/second.
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The distribution of soil loading on the bottom of a building slab is shown below. Replace this loading by an equivalent resultant force and specify its location, measured from point 0 . (Hint: break-down each side of the soil loading into a rectangular uniform load and a triangular uniform load) Determine the mass in kilograms of an object that has a weight of 150kN.
Answers
To determine the mass in kilograms of an object with a weight of 150 kN, we need to convert the weight to mass by dividing it by the acceleration due to gravity.
The weight of an object is the force exerted on it due to gravity, while mass is a measure of the amount of matter in an object. Weight is calculated by multiplying the mass of an object by the acceleration due to gravity. In this case, we are given the weight of the object as 150 kN.
To find the mass, we divide the weight by the acceleration due to gravity, which is approximately 9.8 m/s². Converting 150 kN to Newtons (N) by multiplying by 1000, we have:
Weight = 150 kN = 150,000 N
Now, dividing the weight by the acceleration due to gravity:
Mass = Weight / Acceleration due to gravity
Mass = 150,000 N / 9.8 m/s²
Calculating this value gives us the mass of the object in kilograms.
Understanding the difference between weight and mass is fundamental in physics. Weight depends on the gravitational force acting on an object, while mass represents the amount of matter an object contains. Converting between weight and mass requires dividing or multiplying by the acceleration due to gravity, which can vary slightly depending on the location on Earth or the celestial body in question.
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write any five effect of human activities on the earth and explain each of them in brief
Answers
Answer:
here Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water. These negative impacts can affect human behavior and can prompt mass migrations or battles over clean water.
Explanation:
What should you do in case of radiation exposure?
Answers
Lock any windows and doors that are open. Head to the centre or basement of the structure. The recommended course of action is to stay as far away from the building's walls and top as you can since radioactive.
What is the highest source of radiation exposure?If radon gas is allowed to build up in a residence, it not only poses a health concern to uranium miner but also to homeowners. It is typically the biggest source of exposure to natural radiation.
Why, in your opinion, is it crucial to be knowledgeable about radiation exposure?We have been surrounded by radiation throughout our development. Therefore, the low amounts we are exposed each day are something our bodies are built to handle. However, excessive radiation can harm tissues by altering cell structure and DNA. Cancer is only one of the significant health issues this can lead to.
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internal diameter of a test tube
Answers
Answer:
16 mm with 14 mm inside diameter.
what is the gravitational potential energy of a 1.02 kg book on the top of a 2.0m locker
Answers
Answer:
20.4
Explanation:
tia phản xạ trên gương phẳng nằm trong cùng mặt phẳng với:
Answers
Answer:
can anyone translate
Explanation:
because i cant read this
A meteorite enters the Earth's atmosphere and burns up before reaching the Earth itself. The meteorites' kinetic energy stores are transferred to the surroundings as heat, sound and what else?
Answers
The meteorites' kinetic energy stores are transferred to the surroundings as heat, sound and light energy.
A meteorite possesses kinetic and potential energy before it enters the Earth's atmosphere. Frictional heating happens when it enters and descends towards the Earth's surface because of collisions with atmospheric molecules, which slows its velocity. As a result, the kinetic energy drops and is changed to heat energy. As potential energy is transformed into kinetic energy, it constantly decreases. Ablation also results in mass loss.
Friction starts to work on the meteorite as it enters the earth's atmosphere. A meteorite will have kinetic energy when it enters the earth's atmosphere. The meteorite catches fire as a result of friction. At this time, the meteorite's kinetic energy will be transformed into heat, sound, and light energy.
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What would it take to get the stone slab to move? Propose an
idea and explain how it would work in the context of Newton's
laws.
Answers
In order to get a stone slab to move, one would have to apply force to it. This can be done in a number of ways, depending on the situation. Here are a few possible laws that could be proposed for moving a stone slab:1. Newton's first law of motion: This law states that an object at rest will stay at rest unless acted upon by an external force. Therefore, to move a stone slab, one would need to apply a force to it.
This could be done by pushing it, pulling it, or applying a force from a lever or other mechanical device. Newton's second law of motion: This law states that the force required to accelerate an object is directly proportional to its mass. Therefore, to move a stone slab, a greater force would be required if it is more massive. This could be accomplished by using more people to push or pull the slab, or by using a larger lever or other mechanical device.. Friction: Friction is the force that opposes motion between two surfaces that are in contact with each other. In order to move a stone slab, one would need to overcome the friction between it and the surface it is resting on. This could be accomplished by reducing the friction (for example, by using rollers or lubricant), or by applying a greater force to overcome the friction.Work: Work is defined as the product of force and distance. Therefore, in order to move a stone slab, one would need to apply a force over a certain distance.This could be accomplished by pushing or pulling the slab over a distance, or by using a lever or other mechanical device to apply force over a greater distance.These are just a few possible laws that could be proposed for moving a stone slab. Ultimately, the best approach will depend on the specific situation and the resources available.For such more question on Newton's second law
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A roller coaster has a mass of 300 kg. It drops from rest at the top of a hill that's 101 m tall. How fast is it going when it reaches the bottom? Acceleration due to gravity is g = 9.8 m/s2 .
Answer choices:
A. 41.2 m/s
B. 21.8 m/s
c. 44.5 m/s
D. 76.7 m/s
Answers
300k
minus
9.8
divide 101
the two best means of avoiding injury from electrical devices are
Answers
1. Proper Training and Knowledge: The first and most important step in avoiding injury from electrical devices is to receive proper training and knowledge about how to safely operate and handle electrical equipment. It's essential to understand the risks and hazards associated with electrical devices, including the dangers of electric shock and the potential for fire or explosion.
2. Use of Protective Gear and Equipment: Another crucial means of avoiding injury from electrical devices is to use appropriate protective gear and equipment.
This includes wearing rubber gloves and safety glasses when working with electrical equipment, using insulated tools to prevent electric shock, and wearing appropriate clothing to reduce the risk of fire or electrical burns. Additionally, always make sure to use equipment that is properly grounded and to avoid using damaged or frayed electrical cords.
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A 0.57 kg rubber ball has a speed of 2.2 m/sat point A and kinetic energy 8.0 J at pointB. Finda) the ball’s kinetic energy at A.Answer in units of J.015 (part 2 of 3) 10.0 pointsb) the ball’s speed at B.Answer in units of m/s.016 (part 3 of 3) 10.0 pointsc) the total work done on the ball as it movesfrom A to B.Answer in units of J.
Answers
Given that the mass of the ball is m = 0.57 kg.
The speed of the ball is
\(v_A=2.2\text{ m/s}\)A) The kinetic energy at point A will be
\(\begin{gathered} K\mathrm{}E._A\text{ =}\frac{1}{2}m(v_A)^2 \\ =\frac{1}{2}\times0.57\times(2.2)^2 \\ =1.38\text{ J} \end{gathered}\)B) Given that the kinetic energy,
\(K\mathrm{}E._B=\text{ 8 J}\)The ball's speed at point B will be
\(\begin{gathered} K\mathrm{}E._B=\frac{1}{2}m(v_B)^2 \\ v_B=\sqrt[]{\frac{2K.E._B}{m}} \\ =\sqrt[]{\frac{2\times8}{0.57}} \\ =5.298\text{ m/s} \end{gathered}\)C) The total work done on the ball to move from point A to B is
\(\begin{gathered} W=K\mathrm{}E._B-K.E._A \\ =8-1.38\text{ } \\ =6.62\text{ J} \end{gathered}\)7. Compare and contrast electric force and gravitational force.
8. Describe the conditions under which electric force can either be attractive or repulsive.
Answers
Answer:
• Gravitation only attracts, while electrical forces attract when the
electrical charges are opposite and repel if the charges are similar.
Gravitation is considered a monopole force, while electrostatics is a
dipole force.
Explanation:
• The strength of both forces depends on the distance.
• Both gravitation forces and electric forces obey the inverse square law of distance.
• Both gravitation forces and electric forces can operate even in vacuum.
• Both gravitation forces and electric conservative forces
• Electric force is created by the attraction or repulsion of two charged bodies.
• Gravitational force is created by two bodies being attracted to each other due each body
being caught in each other's gravitational field.
an object is moving in a straight line with constant acceleration a)its acceleration start increasing at some rate than b)
velocity will start decreasing c) its velocity will keep on increasing d)its velocity will remain constant or objective is suddenly come to a stop
Answers
Answer:
C
Explanation:
Velocity = velocity (initial) + acceleration*time.
More time - higher velocity.
How to find the force.
Answers
If mass and acceleration are given use F =ma.
two objects attract each other with a gravitational force of 18 units. the mass of one of the objects was tripled, and the distance between the objects tripled, what would be the new gravitational force of attraction between the two objects?
Answers
Answer:
6 units
Explanation:
Gravitational force between two objects is given by the equation
\(F = G \dfrac{m_1m_2}{r^2}\)
where
\(G =\)universal gravitational constant
\(m_1\), \(;m_2\) are the masses of the objects
\(r\) = distance between the objects
We are given that F = 18 units.
If m₁ is tripled and r is also tripled then
new F = F':
\(F' = G \dfrac{3m_1 \cdot m_2}{(3r)^2}\\\\\\F' = G \dfrac{3m_1 \cdot m_2}{9r^{2}}\\\\\\So \dfrac{F'}{F} = G \dfrac{3m_1 \cdot m_2}{9r^{2}} \div G \dfrac{m_1 \cdot m_2}{r^{2}}\)
\(= \dfrac{3}{9} = \dfrac{1}{3}\\\)
Therefore the new F is 1/3 of the old f
In this case that would be 18/3 = 6 units