Answers
Explanation:
Thermal energy is defined as the kinetic energy present within the particles of a substance.
A process in which energy is absorbed by the molecules of a substance is known as endothermic process. On the other hand, a process in which energy is released by the molecules of a substance is known as exothermic process.
Condensation : A process in which vapors change into liquid as bonds are formed and energy is released.
Freezing : A process in which liquid changes into solid as bonds are formed and energy is released.
Deposition : A process in which particles of a substance come closer to each other resulting in bond formation and release of energy.
Sublimation : A process in which solid state directly changes into gaseous state without undergoing liquid state is known as sublimation. In this process, bonds break and energy is absorbed by the solid particles.
Evaporation : A process in which liquid changes into gas as energy is absorbed leading to breakage bond.
Melting : A process in which solid changes into liquid as energy is absorbed leading to breakage bond.
Thus, we can conclude that given processes are sorted as follows.
Thermal energy added : Sublimation, evaporation, and melting.Thermal energy released : condensation, freezing and deposition.Related Questions
Newton's Three Laws - Complete the sentences.
Newton's FIRST Law of Motion
An object at ___ stays at ___ or an object that is ___ at a ___ in a straight ___ keeps moving at that ___ unless another ___ acts on it.
Newton's SECOND Law of Motion
The amount of ___ needed to make an object change its ___ depends on the ___ of the object and the ___ required.
Newton's THIRD Law of Motion
For every ____ (or force), there is a(n) ___ and ___ action (or force).
Answers
2. The rate of change of momentum is directly related to the force pressed upon it. In other words, when an object is pushed with more force, it will move faster and further away.
3. To every action, there is equal and opposite reaction.
The FIRST law states that an object at rest stays at rest, or if it's moving it continues at a consistent speed and direction unless acted on by another force. The SECOND law implies that the force needed to change an object's motion depends on its mass and the required acceleration. The THIRD law states that every force (action) has an equal and opposite force (reaction).
Explanation:Newton's Laws of MotionNewton's FIRST Law of Motion
An object at rest stays at rest, or an object that is moving at a consistent speed in a straight line keeps moving at that speed unless another force acts on it.
Newton's SECOND Law of Motion
The amount of force needed to make an object change its motion depends on the mass of the object and the acceleration required.
Newton's THIRD Law of Motion
For every action (or force), there is a(n) equal and opposite reaction (or force).
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According to the scientific definition of work, which of these best shows that work is being done
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The best statement that represents the work is being done is A car being towed down a street.
What is work?The meaning of the work in terms of physics should represent the measurement of the energy transfer that arises at the time when the object should be moved over the distance via the external force also it should be applied at the displacement direction.
Therefore, The best statement that represents the work is being done is A car being towed down a street.
This question is incomplete. Please find the options below.
f A lamp hanging from a ceiling
g A rocket drifting through space
h A man pushing against a concrete wall
j A car being towed down a street
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Final answer:
Scientific work requires a force to cause an object's displacement in the direction of the force, and is calculated by the equation W = Fd cos θ. No work is done if there is no displacement or the force is perpendicular to the direction of displacement.
Explanation:
The scientific definition of work differs from everyday use. In physics, work requires that a force causes a displacement of an object, and the force must have a component in the direction of the displacement. This process implies a transfer of energy. To calculate work done (W) scientifically, you use the equation W = Fd cos θ, where F is the magnitude of the force applied, d is the displacement of the object, and θ is the angle between the force vector and the displacement vector. When there's no displacement or the force is perpendicular to the displacement, no work is done according to science.
For example, pushing against a wall would not be considered work in the scientific sense because the wall does not move—there's no displacement. However, lifting an object off the ground does constitute work as the direction of the force (upwards) is the same as the direction of the movement (also upwards), and the object is displaced from its initial position.
The illustration shows a light ray striking an object.
In the illustration, the light ray striking the object is-
A.refracted
B.stopped
C.absorbed
D.reflected
Answers
The illustration represents that the light ray striking the object is reflected. Hence, option (D) is correct.
The given problem is clear explanation for the reflection of light rays. The phenomena by which the rays of light strikes a surface bounce back exactly from the surface by making some angle with respect to normal, is known as reflection of light ray.
In the given figure, we can clearly observe that the light ray is striking the vertical surface somewhere from the bottom, which is known as incident ray. When this ray strikes the surface it bounce back from the surface and we can observe the upward arrow to represent the reflected ray of light.
Thus, we can conclude that the illustration represents that the light ray striking the object is reflected. Hence, option (D) is correct.
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Which diagram best represents the relationship between the Earth and Sun that causes the changes in seasons on Earth?
Answers
Indeed, the inclination of the Earth's axis has the effect to expose to the sunlight a hemisphere more than the other: i.e. during the month of January, the axis is inclined so that the South pole is closer to the Sun than the North Pole, resulting in summer in the Southern Hemisphere and winter in the Northern Hemisphere; while during the month of August the axis is inclined so that the North pole is closer to the Sun than the South Pole resulting in summer in the Northern Hemisphere and winter in the Southern Hemisphere.
Answer: third diagram
Explanation:
A very small red laser pointer is pointed on the wall across the room. When inspecting the reddish light on the wall, you notice that it is _______________ because it has been diffracted.
A) bent
B) brighter
C) spread out
D) bounced back
Answers
the answer is c) spread out
In a two planet system, does an increase in planet velocity result in a decreased period?
Answers
Answer:
d.
No, if velocity becomes too great, the planet can escape the Sun's gravitational pull.
Explanation:
It is correct on Edge 22
which statement best compares potential and kinetic energy
Answers
Answer:
Potential energy is the energy possessed by a body at rest while kinetic energy is the energy possessed by a body in motion.
Explanation:
Potential energy is the energy possessed by a body by virtue of its position while kinetic energy is the energy possessed by a body by virtue of its motion. Potential energy is the energy acting on a body at rest(not moving) while kinetic energy is the energy acting on moving object(motion).
Example of potential energy is the energy possessed by a parked car. The parked car is not moving i.e the car is in a state of rest
Example of kinetic energy is the energy possessed by an accelerating car. The car is in motion (moving).
Archimedes is supposed to have said, "Give me a place to stand on, and I will move the Earth." Suppose you had an object with a mass equal to that of Earth (5.98 1024 kg), and it experienced gravity equal to that at Earth's surface, so that its weight was 5.87 1025 N. If by using a lever you could move this mass with a force of 175 N, what would be the mechanical advantage of the lever?
Answers
[tex]MA= \frac{ F_{a} }{F_{b}} [/tex]
We are given information:
[tex]F_{a} = 5.87* 10^{25} N \\ F_{b} = 175N[/tex]
[tex]MA= \frac{ 5.87* 10^{25} N }{175 N} \\ MA=3.4* 10^{23} [/tex]
compare and contrast sound waves and light waves . include the physical properties and various behaviors each wave exhibits including those are similar and different
Answers
sound waves and light waves are both types of waves that exhibit similar behaviors such as reflection, refraction, and interference. However, they differ in their physical properties such as the medium they travel through, their speed, and their frequency.
What is the difference between a sound wave and a light wave?Sound waves and light waves are both types of waves that propagate through a medium, but they have several differences in their physical properties and behaviors.
Physical Properties:
1. Medium: Sound waves require a medium to travel through, such as air, water, or solids. Light waves, on the other hand, can travel through a vacuum and do not require a medium.
2. Speed: Sound waves travel at a slower speed than light waves. The speed of sound waves depends on the density and compressibility of the medium through which they are traveling. In contrast, the speed of light waves is constant in a vacuum and is one of the fundamental constants of nature.
3. Frequency: Sound waves have lower frequencies than light waves. The frequency of a sound wave is the number of cycles per second, measured in hertz (Hz). Light waves have much higher frequencies, typically measured in terahertz (THz).
Behaviors:
1. Reflection: Both sound waves and light waves can reflect off surfaces. When a sound wave reflects off a surface, it changes direction, and the angle of incidence is equal to the angle of reflection. When a light wave reflects off a surface, it undergoes a change in direction and can be either specular (like a mirror) or diffuse (like a matte surface).
2. Refraction: Both sound waves and light waves can be refracted or bent when they pass through a medium with a different density. When a sound wave is refracted, it changes direction and speed, while when a light wave is refracted, it can change direction, speed, and wavelength.
3. Interference: Both sound waves and light waves can exhibit interference when two or more waves combine to form a resultant wave. In sound waves, interference can be constructive, where the amplitudes of the waves add together, or destructive, where the amplitudes cancel each other out. In light waves, interference can be either constructive, where the waves add together to create bright fringes, or destructive, where the waves cancel each other out to create dark fringes.
Therefore, sound waves and light waves are both types of waves that exhibit similar behaviors such as reflection, refraction, and interference. However, they differ in their physical properties such as the medium they travel through, their speed, and their frequency.
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A woman falls to the ground while wearing a parachute. The air resistance on the parachute is 500N. If the woman falls at a constant rate of 5 m/s, then the gravitational force on her is
Answers
In fact, the woman is falling at constant velocity, 5 m/s. This means there is no acceleration on her. But Netwon's second law states that the resultant of the forces acting on the body is equal to the product between the mass and the accleration:
[tex]\sum F =ma[/tex]
But the acceleration is zero, so the resultant of the forces acting on the woman must be zero. Since only two forces are acting (the air resistance, upward, and the gravity, downward) and they are in opposite direction, they must have equal intensity in order to produce a net acceleration of zero, so they both have intensity of 500 N.
what SD can friction do to moving objects
Answers
what is the speed of a wave that has a frequency of 8,500 Hz and a wavelength of 1.5 m?
Answers
F = frequency, 8500 Hz
√ = wavelength, 1.5m
V = F√
V= 8500 * 1.5m
V= 12750m/s
The speed of a wave with a frequency of 8,500 Hz and a wavelength of 1.5 m is calculated as 12,750 m/s by multiplying the frequency and wavelength together.
Explanation:To calculate the speed of a wave, we can use the formula v = f × λ, where v is the speed of the wave, f is the frequency, and λ (lambda) is the wavelength. Given that the frequency, f, is 8,500 Hz and the wavelength, λ, is 1.5 m, you can plug these values into the equation to determine the wave's speed.
Speed of the wave v = 8,500 Hz × 1.5 m = 12,750 m/s
So, the speed of the wave with a frequency of 8,500 Hz and a wavelength of 1.5 m is 12,750 meters per second (m/s).
The larger the push, the larger the change in velocity. This is an example of Newton's Second Law of Motion which states that the acceleration an object experiences is _____ .
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Newton's Second Law of Motion which states that the acceleration an object experiences is directly proportional to the force applied to it
two important influences of dissolving a solute in a solution are temperature and ______.
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Maybe.. please let me know if this is right
As ocean waves get closer to the shore they slow down. This slowing causes them to bend and come in close to parallel with the shore. This is because shallow water and deep water can be thought of as two different media. This bending of a wave is the wave interaction known as
A) diffraction
B) interference
C) reflection
D) refraction
Answers
The correct answer is D) refraction! Hope this helps!
Answer:
i think it is D, hope this helps
HELP NEEDED FOR ASSIGNMENT PLZ HELP NOW Describe an environment in which the sound of a ringing cell phone could not be transmitted, and explain why the ringing wouldn't be heard. Justify your reasoning using complete sentences and key vocabulary.
Answers
Answer:
I did my best to research to help you
Explanation:
The answer would be in space because there is no matter and if there isn't matter the sound of a ringing cell phone could not be transmitted.
what is the name given to the force exerted by the first object on a second object
Answers
The force exerted by the first object on a second object is known as the action force, a part of Newton's Third Law of Motion, which states that equal and opposite forces are exerted on both objects involved in an interaction.
The name given to the force exerted by the first object on a second object is generally referred to as the "action" force. This is a part of Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. This law means that whenever one body exerts a force on a second body, the second body simultaneously exerts a force that is equal in strength and opposite in direction to that of the first body.
This concept is significant because it underlines the symmetry of forces in nature. When object A exerts a force on object B, object B exerts a force back on object A. These forces are equal in magnitude but opposite in direction, reflecting Newton's Third Law which is often informally referred to as the law of action and reaction.
Match these items
. 1. first nuclear reactor Fermi 2. atomic mass 3. splitting of nuclei into lighter elements neutron 4. number of neutrons and protons Becquerel 5. builds heavier elements fission 6. discovered radioactivity curie 7. unit of radiation fusion
Answers
Atomic mass is number of neutrons and protons
Fermi is first nuclear reactor
Fission involves splitting of nuclei into lighter elements
Fusion builds heavier elements
Curie is a unit of radiation
Answer:
Answer:
1. Fermi
2. Neutron
3. Fission
4. Atomic mass
5. Fusion
6. Becquerel
7. Curie
Explanation:
How much force is needed to lift a 25-kg mass?
Answers
where [tex]m=25 kg[/tex] is the mass and [tex]g=9.81 m/s^2[/tex] is the gravitational acceleration. Substituting, we have
[tex]W=mg=(25 kg)(9.81 m/s^2)=245.3 N[/tex]
And therefore, the force F we have to apply must be at least equal to this value, in order to lift the object.
HELP ASAP PLEASEEEEEEEEEEEE
Answers
it's the only one with a negative gradient.
so the temperature of the ball will fall in water as it looses its heat.
activate windows,:-P
a 45kg boy is holding a 12kg pumpkin while standing on ice skates on a smooth frozen pond. the boy tosses the pumpkin with a horizontal speed of 2.8 m/s to the right towards a 37 kg girl who catches it. the girl is also on ice skates. what are the final speeds of the boy and the girl?
Answers
1) Let's analyze the moment when the boy tosses the pumpkin. Before this moment, the boy is standing with the pumpkin, so with speed v=0 and therefore the total momentum of the system (boy+pumpkin) is zero.
After he tosses the pumpkin, the boy will start to move with speed [tex]v_b[/tex] and the pumpkin starts to move with speed [tex]v_p=2.8 m/s[/tex]. The momentum of the boy is [tex]m_b v_b[/tex] (with [tex]m_b =45 kg[/tex] being the mass of the boy), while the momentum of the pumpkin is [tex]m_p v_p[/tex] (where [tex]m_p=12 kg[/tex] is the mass of the pumpkin). Since the total momentum must be equal to zero (because the total momentum cannot change), then we can write
[tex]m_b v_b + m_p v_p =0[/tex]
From which we find
[tex]v_b = - \frac{m_p v_p}{m_b}=- \frac{(12 kg)(2.8 m/s)}{45 kg} =-0.75 m/s [/tex]
and this is the speed of the boy, and the negative sign means he's moving in the opposite direction of the pumpkin.
2) Now let's focus on the entire system (boy+pumpkin+girl). Initially, the total momentum of this system is zero, because both the boy (holding the pumpkin) and the girl are still. So, the total momentum after the girl catches the pumpkin must be still zero.
After this moment, the boy has a momentum of [tex]m_b v_b[/tex], while the girl has momentum [tex](m_g+m_p)v_g[/tex] where [tex]m_g=37 kg[/tex] is the girl mass [tex]v_g[/tex] is the girl speed. Here we use [tex]m_g+m_p[/tex] because the girl is holding the pumpkin now. Therefore, the conservation of momentum becomes
[tex]m_bv_b + (m_g+m_p)v_g =0[/tex]
and so
[tex]v_g = - \frac{m_b v_b}{m_g+m_p} =- \frac{(45 kg)(-0.75 m/s)}{37 kg+12 kg} =0.69 m/s[/tex]
and this is the girl's speed, with positive sign so with same direction of the pumpkin initial direction.
Final answer:
Using the conservation of momentum, the final speed of the boy after throwing the pumpkin is 0.7467 m/s to the left, and the final speed of the girl after catching the pumpkin is 0.6857 m/s to the right.
Explanation:
The problem you're trying to solve involves the conservation of momentum, because momentum is conserved when objects interact in a closed system without external forces, such as the scene described with skaters on ice. To find the final speeds of the boy and the girl, we'll use the principle of conservation of linear momentum. Since initially they are both at rest and the boy throws the pumpkin, the final momentum of the system must be zero.
Using the equation for conservation of momentum: momentum before the throw = momentum after the throw. Initially, both the boy and the pumpkin are stationary, so their initial combined momentum is 0. After the boy throws the pumpkin, he will move in the opposite direction to conserve momentum.
Momentum of the boy after the throw: m_boy × v_boy = 0 - (mass of pumpkin × velocity of pumpkin)
Momentum of the girl after catching the pumpkin: m_girl + mass of pumpkin × v_girl = mass of pumpkin × velocity of pumpkin
m_boy = 45kg (mass of the boy)
m_pumpkin = 12kg (mass of the pumpkin)
v_pumpkin_initial = 2.8 m/s (speed of the pumpkin)
Let's calculate the speed of the boy after he throws the pumpkin:
45kg × v_boy = 0 - (12kg × 2.8 m/s)
v_boy = (-33.6 kg×m/s) / 45kg
v_boy = -0.7467 m/s
The negative sign indicates that the boy is moving in the opposite direction to the pumpkin's initial movement. Now, let's find the speed of the girl after catching the pumpkin:
(37kg + 12kg) × v_girl = 12kg × 2.8 m/s
49kg × v_girl = 33.6 kg×m/s
v_girl = 0.6857 m/s
The boy's final speed is 0.7467 m/s to the left, and the girl's final speed is 0.6857 m/s to the right.
How much power is required to lift a 25 kg box to the top of a 4 meter flight of stairs in 3.5 seconds?
Answers
What type of barometric readings would you expect if you brought your barometer to the top of a mountain?
Please help!
Answers
The value of the atmospheric pressure depends on many things, but mainly on the altitude. In fact, the value of the atmospheric pressure at a given location depends on the weight of the column of air above the location. As we go higher in altitude, the weight of this column of air decreases, and so the atmospheric pressure decreases.
Therefore, at the top of a mountain the barometer will read a value for the atmospheric pressure lower than the value measured at sea level.
Describe what happens when you fire a gun from the perspective of Newton's 3rd Law.
Answers
Answer: When you fire a gun from the perspective of newton's third law there is an equal and opposite reaction. This is what makes the bullet go forward and the gun kick back.
Explanation: when you fire a gun you pull the trigger, after you pull the trigger a mechanism in the gun goes forward very quickly to strike the primer on the bullet. The bullet will propel forward causing the gun to go backward into your shoulder.
At the point when you discharge a gun, Newton's third Law of Motion, which expresses that for each activity, there is an equivalent and inverse response.
As per Newton's third Regulation, when the shot is discharged from the weapon, the firearm applies a forward force on the slug, moving it out of the barrel at rapid. At the same time, the slug applies an equivalent and inverse power on the firearm. The gun recoils backward due to the opposing force. The size of the power applied by the slug on the firearm is equivalent to the power applied by the weapon on the projectile, however the impacts are different because of the huge contrast in mass between the shot and the weapon. The projectile, being a lot lighter, speeds up quickly forward, while the heavier firearm goes in reverse with a much lower speed increase. The person firing the gun can feel this recoil, which is a direct result of Newton's third law of motion.21 POINTS AND BRAINLIEST
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could you create a way to exert a continuous push on the ball? How would the ball respond to this continuous push?
Answers
The three forces acting on a hot-air balloon that is moving vertically are its weight, the force due to air resistance and the upthrust force. The hot-air balloon descends vertically at constant speed. The force of air resistance on the balloon is F. Which weight of material must be released from the balloon so that it ascends vertically at the same constant speed? A F B 2F C 3F D 4F
Answers
Explanation :
The forces acting on hot- air balloon are:
Weight, (W)
Force due to air resistance, (F)
Upthrust force, (U)
Its weight W is acting in downward direction. The upthrust force U acts in upward direction. When the balloon is moving upward, the air resistance is in downward and vice versa.
In this case, the hot-air balloon descends vertically at constant speed.
so, [tex]a=0[/tex]
and [tex]F=ma=0[/tex]
so, [tex]W = F + U[/tex] ....................(1)
when it is ascending let the weight that it is releasing is R, so
[tex](W-R) + F = U[/tex]..........(2)
solving equation (1) and (2)
[tex](W-R)+F=W-F[/tex]
[tex]R=2F[/tex]
2F is the weight of material that must be released from the balloon so that it ascends vertically at the same constant speed.
Answer: (B) .2 F
Explanation :
The weight is always downward and it is a constant.
The upthrust fore U acts upward and it has always same value as it depend on the difference in height between the top and bottom surface of the air balloon.
The direction of the force due to air resistance depends on the motion and air resistance always opposite motion. air resistance downwards that means the air balloon will ascending and air balloon will descending then air resistance is upwards.
So, air resistance depends on speed .
When air balloon descending at constant speed
Air resistance = F
A constant speed means acceleration is zero that means the resultant force is zero.
W = F + U.....(I)
When air balloon ascending
air resistance = F downwards
Some weight of the material needs to be released for the resultant force to be zero.
Suppose, the weight to be released be R.
(W - R) + F = U......(II)
From equation (I)
U = W- F....(III)
The upthrust force has same value throughout the motion.
Now, put the value of U in equation (I)
W - R + F = W - F
-R = - F - F
R = 2 F
Hence, this is the required solution.
How can you separate a mixture of 10 grams of salt and 10 grams of sand?
Answers
Step 2.) Pour water into the cup or bowl.
Step 3.) Stir the contents.
10 grams of salt and 10 grams of sand can be separated by adding water into the mixture. Once you stir the mixture, the salt will dissolve into the water.
We have that we use dissolving, filtration and distillation to separate sand from salt
Dissolving,Filtration DistillationSand can be separated adding water to the mixture upon dissolving we filter to get the salt solution out of the sand
Then we distill by boil salt solutions at vaporization temperature of water to get salt back the water and salt solution to get salt back
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how could you make a sound wave sound louder
Answers
The loudness of a sound can be increased by increasing the amplitude of the sound wave. This can be achieved by adjusting the volume on a speaker or by using devices designed to amplify sound, like a vuvuzela. Also, sounds with higher amplitude and intensity, such as those from a loud car stereo, are naturally louder.
Explanation:The loudness or volume of a sound wave can be increased by increasing its amplitude. The amplitude of a sound wave determines how much energy it carries, which directly affects its loudness. An example of this is how a speaker produces louder sounds: as you increase the volume on a speaker, it causes the table or surface it is on to vibrate more vigorously. This is because the speaker is moving more air (higher amplitude), which translates to a louder sound.
Another example is using a vuvuzela. The size and construction of the vuvuzela are designed to amplify the sound produced by the person blowing into it, making it louder. The amplified sound has a higher amplitude and therefore a louder volume.
Finally, in a real-life scenario, consider two sounds: one from a passing car's stereo and the other from the person next to you. The sound from the car's stereo is amplified due to its higher intensity and amplitude, making it louder and causing it to dominate over the sound coming from the person next to you.
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What evidence supports the law of conservation of energy?
Answers
Answer:
Light energy is absorbed by plants and converted to chemical energy.
Explanation:
What determines the atomic number of an element? Question 2 options: A.protons
B.neutrons
C.electrons