Water is placed at room temperature at 20 degree C
now after some water evaporate at room temperature
so here we can say speed of water molecules will not change as the temperature is same after evaporation
as we know that total kinetic energy is given by
[tex]KE = \frac{f}{2} nRT[/tex]
since temperature is same then energy will not change here
now as water evaporate to vapors then we can say that here all molecules are separated more in vapor phase so force of interaction will be less in this phase
And since potential energy depends on the force so potential energy will decrease in this phase
When water evaporates, the molecules that escape to the gas phase have an increase in average kinetic energy and a decrease in average potential energy.
Explanation:When a liquid, such as water, evaporates, the molecules that escape into the gas phase have an increase in average kinetic energy and a decrease in average potential energy compared to when they were in the liquid phase.
The increase in average kinetic energy is due to the fact that molecules in the gas phase move faster than those in the liquid phase. This increase in kinetic energy allows the molecules to overcome the intermolecular forces and escape into the gas phase.
On the other hand, the decrease in average potential energy occurs because the intermolecular forces holding the liquid together are weaker than those between molecules in the gas phase. As a result, the average potential energy of the molecules that escape to the gas phase is lower.
A person is trying to lift a crate that has a mass of 30 kg. The normal force of the floor is currently supplying 150 N of force. How much force is the person currently exerting?
144
150
294
294
The person is exerting an equal force of 150 N against the crate, as per Newton's Third Law of Motion, meaning the force exerted by the person is equal to the normal force of 150 N.
Explanation:To determine how much force a person is currently exerting to lift a crate with a mass of 30 kg, given the normal force supplied by the floor is 150 N, we need to consider the equal and opposite force applied by the person. According to Newton's Third Law of Motion, if the normal force acting upward from the floor is 150 N, then the person must be exerting an equal amount of force in the opposite direction, which would also be 150 N in order to maintain static equilibrium (assuming no other vertical forces are acting on the system, such as acceleration or additional weights).
A car accelerates from rest at 3.6 m/s 2 . How much time does it need to attain a speed of 5 m/s?
car starts from rest
[tex]v_i = 0[/tex]
final speed attained by the car is
[tex]v_f = 5 m/s[/tex]
acceleration of the car will be
[tex]a = 3.6 m/s^2[/tex]
now the time to reach this final speed will be
[tex]t = \frac{v_f - v_i}{a}[/tex]
[tex]t = \frac{5 - 0}{3.6}[/tex]
[tex]t = 1.39 s[/tex]
so it required 1.39 s to reach this final speed
To calculate the time to reach 5 m/s from rest with an acceleration of 3.6 [tex]m/s^2[/tex], the kinematic equation v = u + at is used, where u is zero. Solving for t gives 1.39 seconds.
The question asks about the time it takes for a car to reach a certain speed given a constant acceleration, which falls under the subject of Physics.
To find the time required for the car to attain a speed of 5 m/s from rest with an acceleration of 3.6 [tex]m/s^2[/tex], you use the kinematic equation:
v = u + at
where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time. Since the car starts from rest, the initial velocity u is 0, and we can rearrange the formula to solve for time:
t = (v - u) / a
Plugging in the given values:
t = (5 m/s - 0 m/s) / 3.6 [tex]m/s^2[/tex] t = 5 / 3.6 t = 1.39 seconds
Thus, the car needs approximately 1.39 seconds to accelerate to 5 m/s.
PLEASE HELP FAST FOR 20p
If a 100 N force pulls to the West on an object and a second 100 N force pulls South on the object, which direction is the object likely to move?
equivalent force was applied
N
W E
S
because its is being pulled by south and west it will travel south west.
urgent!
A 1.00-kg beaker containing 2.50 kg of oil (density = 916 kg/m3) rests on a scale. A 1.90 kg block of iron is suspended from a spring scale and completely submerged in the oil (Fig. P9.30). Find the equilibrium readings of both scales.
mass of iron block given as
[tex]m_1 = 1.90 kg[/tex]
density of iron block is
[tex]\rho = 7860 kg/m^3[/tex]
now the volume of the iron piece is given as
[tex]V = \frac{m}{\rho}[/tex]
[tex]V = \frac{1.90}{7860} = 2.42* 10^{-4} m^3[/tex]
Now when this iron block is complete submerged in oil inside the beaker the buoyancy force on the iron block will be given as
[tex]F_b = \rho_L V g[/tex]
here we know that
[tex]\rho_L[/tex] = density of liquid = 916 kg/m^3
[tex]F_b = 916* 2.42 * 10^{-4} * 9.8[/tex]
[tex]F_b = 2.17 N[/tex]
Now for the reading of spring balance we can say the spring force and buoyancy force on the block will counter balance the weight of the block at equilibrium
[tex]F_s + F_b = mg[/tex]
[tex]F_s + 2.17 = 1.90* 9.8[/tex]
[tex]F_s = 16.45 N[/tex]
So reading of spring balance will be 16.45 N
Now for other scale which will read the normal force of the surface we can write that normal force on the container will balance weight of liquid + container and buoyancy force on block
[tex]F_n = F_g + F_b[/tex]
[tex]F_n = (1 + 2.50)*9.8 + 2.17[/tex]
[tex]F_n = 34.3 + 2.17 = 36.47 N[/tex]
So the other scale will read 36.47 N
To find the equilibrium readings of the beaker and spring scale, use Archimedes' principle and the concept of buoyancy.
Explanation:In this question, we are given a beaker containing oil and a block of iron that is submerged in the oil. We need to find the equilibrium readings of both the beaker and the spring scale. To solve this problem, we can use Archimedes' principle and the concept of buoyancy.
The equilibrium reading of the beaker can be found by calculating the weight of the beaker and the weight of the oil it contains. The weight of the beaker can be obtained by multiplying its mass by the acceleration due to gravity, while the weight of the oil can be calculated using its density and volume. The equilibrium reading of the spring scale can be found by calculating the buoyant force acting on the block of iron. The buoyant force is equal to the weight of the fluid displaced by the block of iron, which can be calculated using the density of the oil, the volume of the block, and the acceleration due to gravity. Learn more about Equilibrium Readings here:
https://brainly.com/question/35305266
#SPJ3
What best describes why kepler’s observation of planetary motion is a law instead of a theory
A hypothesis is a guess based off of previous dater or simply reasoning for the most logical outcome.
A theory is a statement that has evidence and facts supporting it but still has room for change or error.
A law is a proven statement that works in every possible case without exception and will never be disproved (unless it was wrongly named a law in the first place).
A copper penny has a mass of 3.1 g and a volume of 0.35 cm3. What is the density of copper? Be sure to show your work and include units.
The density of copper that has a mass of 3.1 g and a volume of 0.35 cm³ is 8.86g/cm³
HOW TO CALCULATE DENSITY:
The density of a substance can be calculated by dividing the mass of the substance by its volume as follows:Density (g/cm³) = mass (g) ÷ volume (cm³)According to this question, copper has a mass of 3.1 g and a volume of 0.35 cm³, hence, the density can be calculated as follows:Density (g/cm³) = 3.1g ÷ 0.35cm³Density of copper = 8.86g/cm³Therefore, the density of copper that has a mass of 3.1 g and a volume of 0.35 cm³ is 8.86g/cm³.Learn more at: https://brainly.com/question/2040396?referrer=searchResults
What is the relationship between the internal energy of a substance and its state of matter? A) As a gas loses internal energy it becomes a plasma. Eliminate B) Closer packed atoms generally have more internal energy. C) As the internal energy decreases a substance will spread further apart. D) As the internal energy increases a substance would go from solid to a liquid.
D. As the internal energy increases a substance would go from solid to a liquid.
hope this helps :)
Answer: Option (D) is the correct answer.
Explanation:
Internal energy is defined as the minimum amount of energy present within the molecules of a substance.
More is the internal energy within the molecules of a substance more will be the number of collisions between them.
As a results, the particles will move away from each other and this leads to change in state of matter from solid to liquid and liquid to gaseous state.
Thus, we can conclude that the relationship between the internal energy of a substance and its state of matter is that as the internal energy increases a substance would go from solid to a liquid.
What is the unit used for measuring both work and energy?
A) joule
B) Newton
C) Pascal
D) meter
A
the unit used for measuring both work and energy is the joule
✿━━━━@♥ℳg━━━━✿
[tex]\boxed{Explained\:Answer}[/tex]
______________________________
✿━━━━@♥ℳg━━━━✿
What is the unit used for measuring both work and energy?
A) joule✔✔
B) Newton
C) Pascal
D) meter
PLease Help!
Below is a picture of a swimmer in a river. Looking at the vectors being added is the swimmer going downstream or upstream?
Downstream, the current is helping the swimmer go faster relative to the land.
Upstream, the current is slowing the swimmer down.
Answer:
Downstream, the current is helping the swimmer go faster relative to the land.
Explanation:
As shown in the figure the resultant vector is the addition of velocity of water and velocity of swimmer.
This shows that the swimmer is in the direction along the flow of the current. Thus, answer is downwards, the current is helping the swimmer go faster relative to the land.
The military uses a special instrument to detect this type of wave to help improve night vision.
A. infrared waves
B. gamma rays
C. radio waves
D. ultraviolet rays
Night vision equipment detects infrared radiation. Where it detects some, it paints the corresponding place on a screen with visible rays.
Which is the correct interpretation of the formula mgf2? the lattice contains 1 magnesium atom for every 2 fluorine atoms. the lattice contains 1 magnesium ion for every 2 fluoride ions. the lattice contains 2 magnesium atoms for every fluorine atom. the lattice contains 2 magnesium ions for every fluoride ion.
Answer: the lattice contains 1 magnesium ion for every 2 fluoride ions.
[tex]MgF_2[/tex] is an ionic compound. It contains positive ions of Magnesium and and negative ions of Fluorine. To balance the +2 positive charge of one magnesium ion, two (-1) negatively charged Fluorine ions are present. Hence, The correct interpretation of [tex]MgF_2[/tex] is that the lattice contains 1 Magnesium ion for every 2 Fluoride ions.
If a rock climber accidentally drops a 77.5-g piton from a height of 215 meters, what would its speed be just before striking the ground? ignore the effects of air resistance.
Let us list out what we know from the question.
Initial Velocity [tex]V_{i} = 0[/tex] since the piton is 'dropped'.
Vertical Displacement of the piton D = 215 m
Acceleration due to gravity [tex]a = 9.8 m/s^{2}[/tex]
Final Velocity [tex]V_{f} = ?[/tex]
Using the equation, [tex]V^{2} _{f} = V^{2} _{i} + 2aD[/tex] and plugging in the known values, we get
[tex]V^{2} _{f} = 0^{2} + 2(9.8)(215)[/tex]
Simplifying by taking square-root on both sides gives us [tex]V_{f} = 64.915 m/s[/tex]
Thus, the speed of the piton just before striking the ground is 65 m/s.
The speed of the piton just before striking the ground would be approximately 64.94 meters per second.
To determine the speed of the piton just before it strikes the ground, we can use the kinematic equation for an object in free fall under the influence of gravity, ignoring air resistance. The equation is:
[tex]\[ v = \sqrt{2gh} \][/tex]
Given:
- The mass of the piton (m) is [tex]\( 77.5 \, g \)[/tex] or [tex]\( 0.0775 \, kg \)[/tex] (since [tex]\( 1 \, g = 0.001 \, kg \))[/tex],
- The height (h) is 215 m.
We can plug these values into the equation:
[tex]\[ v = \sqrt{2 \times 9.81 \, m/s^2 \times 215 \, m} \] \[ v = \sqrt{2 \times 9.81 \times 215} \] \[ v = \sqrt{4217.7} \] \[ v \approx 64.94 \, m/s \][/tex]
Which of the foolwing best define net force?
Net force can be defined as the sum of force acting on an object in all the directions
.i.e Net force= F acting on a body at upward direction+ F at downward direction+ F at leftward direction+ F at rightward direction.
e.g if a body is at rest the sum of forces acting on body in all direction is zero
but if a body is moving its mean body is facing an unbalanced net force.
Suppose the mower is moving at 1.5 m/s when the force F is removed. How far (in m) will the mower go before stopping? The frictional force is a constant 26 N and mass of mower is 22kg
The mower will go approximately 1.163 meters before stopping.
Explanation:To determine the distance the mower will go before stopping, we need to calculate the deceleration first. We can use Newton's second law of motion: F = ma. The net external force (F) is the force exerted by the person minus the frictional force, which is 51 N - 24 N = 27 N. The mass of the mower (m) is 22 kg. Rearranging the formula, we get: a = F/m = 27 N / 22 kg = 1.227 m/s².
Then, using the equation v² = u² + 2as, where v is the final velocity (0 m/s when the mower stops), u is the initial velocity (1.5 m/s), a is the deceleration (-1.227 m/s²), and s is the distance we're trying to find. Rearranging the equation, we get: s = (v² - u²) / (2a) = (0 - (1.5)²) / (2 * (-1.227)) = 1.163 m.
Learn more about Stopping distance of a mower here:https://brainly.com/question/29800167
#SPJ3
The lawn mower will travel approximately 0.955 meters before stopping.
To find out how far the lawn mower will travel before stopping, we need to use the principles of physics, specifically the concepts of friction and linear motion. Here’s the step-by-step method:
We start with the given data: The frictional force F opposing the mower’s motion is 26 N, the mass m of the mower is 22 kg, and its initial velocity v0 is 1.5 m/s.The frictional force is the only force acting in the horizontal direction once the pushing force is removed, causing the mower to decelerate.The acceleration a can be found using Newton's second law: a = F/m. Thus, a = 26 N / 22 kg ≈ 1.18 m/s².This acceleration is negative because it is a deceleration (the mower is slowing down): a = -1.18 m/s².To find the stopping distance, we use the kinematic equation: vf² = v0² + 2ad, where vf is the final velocity (0 m/s), v0 is the initial velocity, a is the acceleration, and d is the distance.Rearranging for d: d = (vf² - v0²) / (2a). Plugging in the values: d = (0 - (1.5)²) / (2 * -1.18) ≈ 0.955 m.Therefore, the lawn mower will travel approximately 0.955 meters before coming to a stop.
What is the appropriate unit of measurement for pitch?
The appropriate unit of measurement for pitch is mel.
There are several definitions of 'pitch', but I think you mean how 'high' or 'low' a sound sounds to our ear.
If that's it, then you're talking about the frequency of the sound, and the unit is 'vibrations per second' or 'Hertz' (Hz) .
two objects each weighing 2kg are lifted through the same distance in 4s and 1s respectively. which scenario requires more work?
i believe it would be the same because time doesn't matter when calculating total work done.
Work=FxD
F=force
D=distance
Final answer:
The scenario that requires more work is when the force applied is greater.
Explanation:
Work is defined as the product of force and displacement.
The work done on an object is given by the formula: work = force × distance × cosine(θ), where θ is the angle between the force and displacement vectors.
In this case, both objects are lifted through the same distance. Therefore, the work done on each object is equal to the force applied to lift the object multiplied by the distance lifted.
The time taken to lift the object does not affect the work done.
So, the scenario that requires more work is when the force applied is greater.
The fact that the sun exerts a force on you, even though it it very far away, is a consequence of the Universal Law of __________.
Gravitation, gravity won't work, it has to be gravitation
the answer is gravitation :D
The angle between magnetic north and the north to which a compass needle points is known as magnetic declination.
Please select the best answer from the choices provided
T
F
From among the choices provided, the better choice is the upper-case letter 'T '. That symbol can conveniently be used to represent the words "true" or "truth", which is exactly the reason that it is the better choice for a response, since the complicated statement at the beginning of the question is completely true in its every detail, nuance, jot and tittle.
Answer:
it is true my child
Explanation:
WILL GIVE BRAINLIEST PLZ HURRY!!!!
When the final velocity is less than the initial velocity, this is , options: speed time acceleration deceleration
When an object is having variable velocity then we can use the definition of acceleration to find it that rate of change in velocity is known as acceleration.
We can define it as
[tex]a = \frac{v_f - v_i}{\Delta t}[/tex]
here
[tex]v_f[/tex] = final velocity
[tex]v_i[/tex] = initial velocity
[tex]\Delta t[/tex] = time interval
now it is given here that final velocity is less than initial velocity after some time which means
[tex]v_f < v_i[/tex]
so here we can say acceleration will have negative value which shows it is opposite to the direction of velocity.
So this is the case of decreasing velocity which is known as deceleration.
So correct answer is
deceleration
If v =5.00 meters/second and makes an angle of 60 with the negative direction of the y-axis coalculate the possible values of vx
An angle of 60 degrees with the negative y-axis could mean 60 degrees clockwise or counterclockwise, which translates to two possible angles (starting from the positive x-axis and moving counterclockwise) of 210 degrees or 330 degrees.
Then the horizontal component [tex]v_x[/tex] of a velocity vector [tex]\mathbf v[/tex] with magnitude [tex]5.00\,\dfrac{\mathrm m}{\mathrm s}[/tex] could be one of two expressions:
[tex]v_x=\left(5.00\,\dfrac{\mathrm m}{\mathrm s}\right)\cos210^\circ=-4.33\,\dfrac{\mathrm m}{\mathrm s}[/tex]
[tex]v_x=\left(5.00\,\dfrac{\mathrm m}{\mathrm s}\right)\cos330^\circ=4.33\,\dfrac{\mathrm m}{\mathrm s}[/tex]
At a distance of 0.75 meters from its center, a Van der Graff generator interacts as if it were a point charge, with that charge concentrated at its center. A test charge at that distance experiences an electric field of 4.5 × 105 newtons/coulomb. What is the magnitude of charge on this Van der Graff generator?
Since the Van de Graaff generator is given to behave like a point charge, we can use the equation for Electric Field, given as
[tex]E = \frac{kQ}{r^{2} }[/tex]
where, [tex]k = \frac{1}{4\pi ε₀}[/tex] = [tex]8.99 X 10^{9} \frac{Nm^{2} }{C^{2} }[/tex]
r is the distance between the generator and the test charge = 0.75 m
E is the magnitude of the Electric Field Strength = [tex]4.5 X 10^{5} N/C[/tex]
Rearranging the equation, making Q the subject of the formula, we have
[tex]Q = \frac{E.r^{2} }{k}[/tex]
Plugging in the numerical values and simplifying them gets us
[tex]Q = 0.2815 X 10^{-4} \\[/tex]
Thus, the charge on the Van de Graaff generator is 28.16 μC.
Answer:
Answer is 2.8 × 10-7 coulombs.
What parts of clam are likely to be preserved?
A:Hard parts
B:soft parts
C:all parts
D:No parts
the answer is a. hard parts.
The hard parts of clams are most likely to be preserved as fossils. Soft parts rarely survive the fossilization process due to their rapid decay, and complete fossil preservation including soft parts is extremely rare.
Explanation:When it comes to preservation, it is the hard parts of bivalves, which include clams, scallops, oysters, and mussels, that are more likely to be fossilized. These organisms have a shell composed of two parts that can open and close, which offers a durable structure capable of surviving long-term geological processes. The soft parts, such as the mouth, heart, intestine, gills, and stomach, typically decay and are rarely preserved; however, there are exceptional occurrences where conditions permit the preservation of soft tissues, as seen with some belemnite fossils, though this is extremely rare.
The alteration of hard parts is a common occurrence in fossil records, resulting in fossil preservation such as permineralization, recrystallization, replacement, carbonization, or dissolution. These processes affect the skeletal material of the hard parts, making them the principal components discovered in fossil records.
How is the energy of an electromagnetic wave carried from one place to another
changing electric field gives a changing magnetc field ... can calculate energy using Poynting vector
What is another hypthesis that might expain hy hummingbirds seem to prefer red flowers
Because it's maybe the only color they see.
What step of the rock cycle happens as the sea stacks are broken down
D. Weathering
The six steps of the rock cycle includes Weathering and Erosion, Transportation, Deposition, Compaction and Cementation. Metamorphism, Rock Melting.
Deposition is the process where rock particles sink at the rivers and become sediment.
Weathering is the process by which wind and water breaks down igneous, sedimentary, and metamorphic rocks. The process refers to large rocks broken down into smaller pieces and the broken off particles stay in the area.
A jet airliner moving initially at 548 mph
(with respect to the ground) to the east moves
into a region where the wind is blowing at
343 mph in a direction 67◦
north of east.
What is the new speed of the aircraft with
respect to the ground?
Answer in units of mph.
Let's choose the "east" direction as positive x-direction. The new velocity of the jet is the vector sum of two velocities: the initial velocity of the jet, which is
[tex]v_1 =548 mph[/tex] along the x-direction
[tex]v_2 = 343 mph[/tex] in a direction [tex]67^{\circ}[/tex] north of east.
To find the resultant, we must resolve both vectors on the x- and y- axis:
[tex]v_{1x}= 548 mph[/tex]
[tex]v_{1y}=0[/tex]
[tex]v_{2x} = (343 mph)( cos 67^{\circ})=134.0 mph[/tex]
[tex]v_{2y} = (343 mph)( sin 67^{\circ})=315.7 mph[/tex]
So, the components of the resultant velocity in the two directions are
[tex]v_{x}=548 mph+134 mph=682 mph[/tex]
[tex]v_{y}=0 mph+315.7 mph=315.7 mph[/tex]
So the new speed of the aircraft is:
[tex]v=\sqrt{v_x^2+v_y^2}=\sqrt{(682 mph)^2+(315.7 mph)^2}=751.5 mph[/tex]
The new speed of the aircraft with respect to the ground, taking into account the wind speed and direction, is approximately 744.91 mph.
Explanation:To solve this problem, you should first break the wind's velocity into its eastward (x-component) and northward (y-component) using trigonometry. The eastward component is 343 mph x cos(67) = 134.87 mph, and the northward component is 343 mph x sin(67) = 313.37 mph.
Now, you can add the eastward component of the wind speed to the initial speed of the jet airliner (548 mph + 134.87 mph = 682.87 mph). The northward component of the wind's speed remains the same (313.37 mph) since the plane was initially moving only eastwards with no northwards component.
The new speed of the aircraft with respect to the ground (or resultant velocity) can be found using Pythagoras' theorem: √[(682.87)^2 + (313.37)^2] = 744.91 mph.
Learn more about Vector Addition here:https://brainly.com/question/35874968
#SPJ3
Electric field lines can never cross.
What would crossed electric field lines indicate?
A) a field pointing in two directions
B) an attractive force on a charge
C) a non uniform area
Of the field
D) a place where the field strength is zero
Answer:
the correct answer on E2020 is A.) a field pointing in two directions.
Electric field lines can never cross. The crossed electric field lines indicate a field pointing in two directions. The correct option is A.
What is electric field?The field developed around a charge. In this field, a charge experiences an electrostatic force of attraction or repulsion depending on the nature of another charge.
Electric field lines originate from positive end and terminate to the negative end of the magnet.
So, the crossed electric field lines indicate a field pointing in two directions.
Thus, the correct option is A.
Learn more about electric field.
https://brainly.com/question/15800304
#SPJ2
As you sit in front of a computer, which of the following is exerting the greatest gravitational force of attraction on you?
A. Earth
B. Your classmate across the room that you've had your eye on
C. Your computer
D. Your chair
Answer: Earth
Explanation:
Mrs. Newman’s class decides to perform an experiment during a class connect session to determine how long it takes different objects to hit the floor when dropped from the student’s desk. Each student dropped three notebooks, one weighing 0.5 pound, one weighing 1.0 pound, and one weighing 2.5 pounds. What would you predict about the times it took for each of them to hit the floor?
a) The 0.5lb notebook would hit the floor first
b) The 0.5lb notebook would hit the floor last
c) The 2.5lb notebook would hit the floor first
d) All notebooks would fall at the same time
e) All notebooks would remain suspended in the air
D, all notebooks would hit the floor at the same time. The time it takes to hit the floor is independent of their weight, but rather dependent on the acceleration of gravity. Since gravity is constant, they will all hit the floor at the same time.
the correct answer would be D because they all have the same gravitational pull
A gorilla is hanging motionless on a tree branch. If the gorilla's weight is 400 Newtons, what must be the tension in the tree branch?
let's convert 400 newtons to Kg, which is 40.7886.
now we put it in a formula that includes gravity and acceleration
(40.7886 kg) ( 9.8 m/s2) + (40.7886 kg) (0)
now we come up with the answer of 399.72828 kg or 3920 Newtons
Not sure which unit you are looking for but they are both there.