Describe the thermodynamics of a phase transformation (What happens to ÎG, ÎH, and ÎS?)

Answer:

Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and brick dropped together. Air resistance causes the feather to fall more slowly.

The statement which is false is as follows:

Thus, the correct option for this question is D.

Friction may be defined as a type of force that resists the sliding or rolling of one solid object over another through the surface that acts on it.

Friction is a force that takes place as the resistance of motion when one object rubs over another. Friction force always opposes the motion along with air resistance.

Friction can also be somehow reduced with the impact of lubrication over the rubbing surface. It is true that air resistance is greater the faster the object is traveling.

Air resistance does not depend on the blowing of the wind. It does not mean that if there is no wind blowing, the air resistance is negligible.

Therefore, the correct option for this question is D.

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Answer:

19 cm

Explanation:

Answer:

Below

Explanation:

d = 1/2 a t^2

.80 = 1/2 ( 5.8 x 10^?) t^2  

  ( I think you left off the exponent...and acceleration has units m/s^2  ...not m/s)

t =  .166 s

v = at = 58 x .166= 9.63 m/s

When calcium loses two electrons to form Ca2+ ion, it has a total of 40 nucleons.

Calcium has an atomic number of 20, implying that it has 20 protons, which is the same as the number of electrons in a neutral calcium atom. Ca2+ is the symbol for calcium ion, and it is formed when calcium loses two electrons. As a result, Ca2+ has a total of 18 electrons. Since electrons are not nucleons, the question is asking for the number of nucleons, which refers to the sum of protons and neutrons.
To determine the total number of nucleons in the Ca2+ ion, we must first determine the number of neutrons in a calcium atom. The atomic mass of calcium is 40.078 g/mol, which means it has 20 neutrons because atomic mass = protons + neutrons. The Ca2+ ion has the same number of protons as the neutral calcium atom (20), therefore it has a total of 20 + 20 = 40 nucleons.

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The calculated instantaneous velocity is 65 m/s

Instantaneous velocity is a more concise term for an object's velocity at that precise moment in time. So, "The velocity of an object under motion at a specific point in time" is the definition provided. The instantaneous velocity of an object may be equal to its standard velocity if it possesses uniform velocity.

given- initial velocity=5 m/s

acceleration=6 m/s²

time taken=10 s

we can use the formula-

v = u + at

v = 5 + (6) (10)

v = 5 + 60

v = 65 m/s

Hence the velocity at instance is 65 m/s

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When an ocean wave passes underneath a boat that is at rest in the ocean, the boat will experience an upward and downward motion. This is due to the fact that waves are characterized by the propagation of energy through a medium (in this case, water), rather than the physical transport of matter.

As if What happens is that as the wave passes beneath the boat, it causes the water directly below it to rise upwards. This causes the boat to rise upwards as well. However, as soon as the water has passed beneath the boat, it falls back downwards again, causing the boat to do the same. This causes the boat to experience an oscillatory or up-and-down motion. This is what is known as wave motion. The frequency and amplitude of the wave will determine the extent to which the boat oscillates.

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When an ocean wave passes underneath a boat that is at rest, the boat will experience a specific motion known as heave.

When the ocean wave approaches the boat, the water beneath the boat begins to rise as the wave crest passes underneath. This causes the boat to be lifted vertically upward. As the wave crest moves away from the boat, the water level beneath it decreases, resulting in a downward motion. This vertical motion of the boat is known as heaving.

However, the boat's horizontal position remains relatively unchanged during this process. While the wave propagates forward, the boat does not experience a significant displacement in the horizontal direction. The boat stays in the same location, except for some minor oscillations caused by the wave passing underneath. Therefore, the boat's horizontal motion is mainly unaffected by the wave.

Overall, as an ocean wave passes beneath a boat at rest, the boat undergoes vertical motion known as heaving, rising as the wave crest approaches and descending as the wave trough passes. However, the boat's horizontal position remains relatively unchanged, with minimal displacement caused by the wave.

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Answer:

See Explanation

Explanation:

The relationship between angle of an incline and the acceleration of an object moving down the incline.

As the angle of an incline increases, so does the acceleration of the body moving down the incline increases, resolving the force acting on an inclined object

Parallel force = mgsin, perpendicular = mgcosΘ

With th weigh component 'mg' of the parallel force accounting for the acceleration of the body down the incline.

mgsinΘ = ma

Fnet = ma

B.) From Fnet = ma

Fnet = ma

a = Fnet / m

Where Fnet = Net force = mgsinΘ, a = acceleration

When light passes through narrow slits, the slits act as sources of coherent waves, and light spreads out as semicircular waves, Pure constructive interference occurs where the waves are crest to crest or trough to trough.

Pure destructive interference occurs where they are crest to trough. The light must fall on a screen and be scattered into our eyes for us to see the pattern. An analogous pattern for water wavesNote that regions of constructive and destructive interference move out from the slits at well-defined angles to the original beam. These angles depend on wavelength and the distance between the slits, Each slit is a different distance from a given point on the screen. Thus, different numbers of wavelengths fit into each path. Waves start out from the slits in phase (crest to crest), but they may end up out of phase (crest to trough) at the screen if the paths differ in length by half a wavelength, interfering destructively. If the paths differ by a whole wavelength, then the waves arrive in phase (crest to crest) at the screen, interfering constructively.

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The value of b for F− at 25 °C can be calculated using the equation for the dissociation constant of HF:

Ka = [H+][F−]/[HF]

Given that Ka for HF is 6.3×10−4 at 25 °C, we can rearrange the equation to solve for b, the value of F−:

b = Ka[HF]/[H+]

Since we are not given the concentrations of HF or H+, we cannot calculate the exact value of b. However, we can use the equation to understand the relationship between Ka, [HF], [H+], and b.

As Ka increases, b will also increase.

Similarly, as the concentration of HF increases, b will increase, and as the concentration of H+ decreases, b will increase.

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Answer:Comparison of the embryological development of different species also reveals similarities that show relationships not evident in the fully-formed anatomy.

Explanation:

Comparison of the embryological development of different species also reveals similarities that show relationships not evident in the fully-formed anatomy.

(Have a great day :D)

The initial moments after the Big Bang and the current universe have a few things in common like Expansion; Radiation; Structure formation; etc.

Expansion: The universe has been expanding since the Big Bang, and this expansion is still happening. The initial moments after the Big Bang were characterized by a period of rapid inflation, and this expansion has continued to shape the structure of the universe we see today.

Radiation: The universe was filled with intense radiation in the initial moments after the Big Bang, and this radiation still exists in the form of the cosmic microwave background (CMB) radiation.

This radiation is thought to have been produced about 380,000 years after the Big Bang and has been traveling through space ever since, providing us with valuable information about the early universe.

Formation of structure: The initial moments after the Big Bang set the stage for the formation of the large-scale structure of the universe we observe today, such as galaxies, stars, and planets. The tiny fluctuations in the density of matter in the early universe were amplified by gravitational attraction over time, leading to the formation of these structures.

However, there are also many differences between the early universe and the universe as it exists now. For example, the universe was much hotter and denser in the early moments after the Big Bang, and there were no stars or galaxies yet.

The universe has also undergone many complex physical processes over billions of years, such as the formation of black holes and the evolution of stars, that were not present in the early universe.

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The marginal product of the 31st worker was 38 bushels of wheat.

The marginal product calculates the change in total output for each change in the workforce as:

Total product change / change in labor force equals marginal product.

Finding the combined output of the 30 and 31 workers is the first stage. Average product multiplied by the quantity of workers yields total product.

Total product = average product x total output

Total product of 30 workers = 100 x 30 = 3000 bushels

Total product of 31 workers = 31 x 98 = 3,038 bushels

Marginal product of 31st worker = (3038 - 3000) / (31 - 30) = 38 bushels

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A fuel-filled rocket is at rest. It burns its fuel and expels hot gas. The gas has a momentum of 1,500 kg m/s backward. So, The momentum of the rocket is -1500 kg m/s.

According to the law of conservation of momentum, in a closed system, the total momentum before and after a process remains constant.

A fuel-filled rocket that is initially at rest expels hot gas as it burns its fuel. The gas has a momentum of 1500 kg m/s backward.

We are required to determine the momentum of the rocket.

Consider the fuel-filled rocket as a system.

We have: Momentum before the burn = 0 kg m/s (since the rocket was at rest initially)Momentum after the burn = momentum of the expelled gas

We can therefore say that the initial momentum of the system was zero (0), and after the burn, the total momentum of the system remains the same as the momentum of the expelled gas.

Therefore: Momentum of rocket = - momentum of expelled gas

The negative sign signifies that the rocket's momentum is in the opposite direction of the expelled gas.

Hence, the momentum of the rocket is -1500 kg m/s.

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Answer:

for resistors in series, add the resistances to get their equivalence. The answer is

80.0 Ohms

The three areas on the map (Figure 2.8) where all the contours make a ‘V’ shape are the three rivers. The tips of the ‘V’ shape point upstream, and the water flows in the direction opposite to the direction of the ‘V’.

We can use blue colored pencils to draw in each of the three rivers and include arrows showing which way the water is flowing.  Long Answer:Topographic maps are often used by geographers and environmental scientists to study the topography of an area. The map displays a series of contours, which are imaginary lines drawn at regular intervals of elevation. The contour lines help to describe the topography of the area by showing the elevation and slope of the land.To interpret a topographic map, one needs to observe the patterns on the map. In Figure 2.8, the three areas on the map where all the contours make a ‘V’ shape are the three rivers. The tips of the ‘V’ shape point upstream, and the water flows in the direction opposite to the direction of the ‘V’.

We can use blue colored pencils to draw in each of the three rivers and include arrows showing which way the water is flowing.When we draw in each of the three rivers using blue colored pencils, it helps us to visualize the direction in which the water is flowing. Drawing in the arrows shows us which way the water is flowing, from higher elevation to lower elevation. The arrows point in the direction of the flow of the water.In conclusion, the patterns on a topographic map provide essential information about the topography of the area. The contour lines help to describe the elevation and slope of the land, while the ‘V’ shape indicates the location of rivers and the direction of water flow. Drawing in the rivers using blue colored pencils and arrows helps to visualize the direction of water flow.

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Answer: mass

The mass of a person is constant, weight is a force that is influenced by gravity.

Answer:

its D

Explanation:

didnt see what u said lol they deleted it again :(

Answer:

its known as the age of mammals

and the current era

Explanation: Ap3x

Answer:

It is the current era & It is also known as the age of mammals

Explanation:

ap3x verified

Answer:

1-Average speed

2-constant

Explanation:

Question 1 : You have the distance and time , need to find average speed

Question 2 : traveling at the same speed that means it's constant

Answer:

cause the changes is the interaction with something. ... So the electromagnetic energy will have increased it's  ...

Wavelength and frequency. Explanation: Electromagnetic energy is determined by wavelength and frequency. These are dependent on each other, so anything ...  More

Answer:

Direction remains the same but velocity changes.

Explanation:

This tell us about the direction and magnitude of the acceleration acting on the cannonball throughout its duration of flight that its direction remains the same but its magnitude of the acceleration is continuously changing. The cannonball moves in the direction in which the cannon was fired while the velocity is highest after the fire but decreases when goes higher and when it comes back to the ground so its velocity increases against so we can say that both positive and negative acceleration occurs. Positive acceleration means increase in the magnitude of velocity whereas negative acceleration means decrease in velocity.

The image is approximately 9.33 cm away from the mirror, on the object's side.

To determine the image location formed by a converging mirror, we can use the mirror equation:

1/f = 1/d_o + 1/d_i

where:

f is the focal length of the mirror,

d_o is the object distance (distance of the object from the mirror), and

d_i is the image distance (distance of the image from the mirror).

In this case, the focal length (f) is given as 7 cm, and the object distance (d_o) is 4 cm.

Plugging in the values into the mirror equation:

1/7 = 1/4 + 1/d_i

To find the image distance (d_i), we can solve for it:

1/d_i = 1/7 - 1/4

1/d_i = (4 - 7) / (4 * 7)

1/d_i = -3 / 28

Taking the reciprocal of both sides:

d_i = 28 / -3

d_i ≈ -9.33 cm

The negative sign indicates that the image formed by the converging mirror is virtual and located on the same side as the object.

Therefore, the image is approximately 9.33 cm away from the mirror, on the object's side.

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Answer:

It is always said that mass is same everywhere.

Answer:

The new pressure will be 12 atm

Answer:

2.3 Nm clockwise

Explanation:

Take counterclockwise to be positive and clockwise to be negative.

∑τ = (3 N) (2.5 m) − (7 N) (1.4 m)

∑τ = 7.5 Nm − 9.8 Nm

∑τ = -2.3 Nm

The net torque is 2.3 Nm clockwise.

Answer:

Collect more fuel than you think you can use; you may need more than you estimate. Pile fine twigs, grass, or bark shavings loosely as a base.