When a liquid is cooled, the kinetic energy of the particles
. The force of attraction between the particles
, the space between the particles

Bohr's model of atom had  Energy levels ( B )

Bohr's model of atom is an improvement on the Rutherford's model but the main difference between Bohr's model and Rutherford's model was the ability of electrons to revolve in a specific orbit around the nucleus in Bohr's model. while in Rutherford's model the electrons revolves in any orbit.   while

The improvement made by Bohr on Rutherford's atomic model was the addition of energy levels and showing the placement of electrons on those distinct energy levels

Hence we can conclude that Bohr's model of atom included  Energy levels to Rutherford's atomic model

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Answer:

B . Energy levels

The velocity of the ball does not change in this process because it is moving in a circle at a constant speed. However, the acceleration of the ball is not equal to zero because it is constantly changing its direction.

The acceleration is the rate of change of velocity, and since the ball is changing direction, its velocity must also be changing. This acceleration is known as centripetal acceleration, and it is directed towards the centre of the circle.

This acceleration is necessary to keep the ball travelling in a circle because if it was not there, the ball would travel in a straight line away from the circle. The magnitude of this acceleration is equal to the square of the speed of the ball divided by the radius of the circle.

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Usually you have to add/subtract all the forces to get the real net force, value, and direction. In this case, is visual cause you don't have any number

F1 and F4 cancel

F2 and F5 cancel

F3 is the only force, but it should cancel with weight.

If the car is moving at constant speed and is not accelerating in any direction, then the force is 0

The horizontal distance traveled by the football is determined as 25.33 m.

The horizontal distance traveled by the football is calculated as follows;

X = u²sin(2θ)/g

where;

X = (18² x sin(2 x 65))/9.8

X = 25.33 m

Thus, the horizontal distance traveled by the football is determined as 25.33 m.

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potassium ions into the cell and

outside

⇒ sodium ions out of the cell.

Answer:

We adopt the positive direction choices used in the textbook so that equations such as Eq. 4-22 are directly applicable. The coordinate origin is at the release point (the initial position for the ball as it begins projectile motion in the sense of §4-5), and we let θ

0

be the angle of throw (shown in the figure). Since the horizontal component of the velocity of the ball is v

x

=v

0

cos40.0°, the time it takes for the ball to hit the wall is

t=

v

x

Δx

=

(25.0m/s)cos40.0

o

22.0m

=1.15s.

(a) The vertical distance is

Δy=(v

0

sinθ

0

)t−

2

1

gt

2

=(25.0m/s)sin40.0

o

(1.15s)−

2

1

(9.80m/s

2

)(1.15s)

2

=12.0m.

(b) The horizontal component of the velocity when it strikes the wall does not change from its initial value: v

x

=v

0

cos40.0°=19.2m/s.

(c) The vertical component becomes (using Eq. 4-23)

v

y

=v

0

sinθ

0

−gt=(25.0m/s)sin40.0

o

−(9.80m/s

2

)(1.15s)=4.80m/s.

(d) Since v

y

>0 when the ball hits the wall, it has not reached the highest point yet.

Answer:

horizontal component of the velocity of the ball is vx​=v0​cos40.0°, the time it takes for the ball to hit the wall is

t=Δx/vx​=(25.0m/s)cos40.0o22.0m​=1.15s.

(a) The vertical distance is

Δy=(v0​sinθ0​)t−21​gt2=(25.0m/s)sin40.0o(1.15s)−21​(9.80m/s2)(1.15s)2=12.0m.

(b) The horizontal component of the velocity when it strikes the wall does not change from its initial value: vx​=v0​cos40.0°=19.2m/s.

(c) The vertical component becomes (using Eq. 4-23)

vy​=v0​sinθ0​−gt=(25.0m/s)sin40.0o−(9.80m/s2)(1.15s)=4.80m/s.

(d) Since vy​>0 when the ball hits the wall, it has not reached the highest point yet.

Explanation:

the speed of the astronaut can be obtained from the calculation as 0.09 m/s.

We know that here we need to use the principle of the moments so as to obtain the speed of the astronaut. We have been told that an astronaut with a mass of 100 kg is at rest outside a space capsule when the tether line breaks.

Knowing that;

Momentum before collision = Momentum after collision

We can now be able to assert that;

(100 * 0) + ( 1 * 10) = (100 + 10) v

v = speed of the astronaut coming back

Thus we have;

v = 10/110

v = 0.09 m/s

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Answer:

The question is incomplete.

It asks you to use the formula W = F * D  (force times distance)

But the question only gives the work W in joules.

You would need to know  the weight of the object to get the distance moved or the distance moved to get weight if you are only given the work done.

Incidentally, the mechanical advantage in diagram is A is 1 whereas the mechanical advantage in B is 2.

So in B you would apply 1/2 the force as in A and would have to move the rope twice as far as in A to do the same amount of work.

Answer:

Attraction

Explanation:

Nucleus has a positive charge. Electron has a negative charge. Opposite charges attract and equal charges repel

The electrical interaction between the nucleus and the orbital electron is a force of attraction.

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The correct answer is(b). There is a physical change from the solid state to a gas state where energy between the molecules increases.

During sublimation, carbon dioxide transitions directly from the solid state (dry ice) to the gas state without passing through the liquid phase. In this process, individual molecules of carbon dioxide gain energy from the surroundings, leading to an increase in their kinetic energy and molecular movement.

As a result, the carbon dioxide molecules separate from each other and form a gas. This phase change is considered a physical change rather than a chemical change since the chemical composition of carbon dioxide remains the same throughout the process.

Therefore, the sublimation of carbon dioxide results in a physical change where the molecules transition from the solid state to the gas state, gaining energy and increasing their molecular movement.

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Answer:

b one is correct........I wish u give me mark as brainlliest

The history of the atom tells us that Dalton's new information to help us understand atoms is that all matter is made of atoms. Atoms are small particles that cannot be created, split or destroyed.

Atomic theory has its origins in ancient Indian and Greek philosophical concepts. ...in the fifth century BC. Democritus BC proposed that matter is made up of indestructible, indivisible units called atoms. The Roman poet Lucretius recorded the idea, so it survived the Middle Ages for later consideration.

J.J. Thomson discovered electrons and noticed that an atom can be divided. Also, he concluded atoms are made of positive cores and negatively charged particles within them.

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Answer: At a time of 6 seconds after it was thrown, how far above the ground is it?

Explanation:

We can start by using the kinematic equation for vertical motion:

y = y0 + v0t + (1/2)at^2

where y is the final height, y0 is the initial height, v0 is the initial velocity, t is the time, and a is the acceleration due to gravity.

We can use this equation to find the height of the ball at a time of 6 seconds after it was thrown. The initial height, y0, is 500 m, the initial velocity, v0, is 20 m/s (upward), the acceleration due to gravity, a, is -10 m/s^2 (downward), and the time, t, is 6 seconds.

Plugging in these values, we get:

y = 500 m + (20 m/s)(6 s) + (1/2)(-10 m/s^2)(6 s)^2

Simplifying, we get:

y = 500 m + 120 m - 180 m

y = 440 m

Therefore, at a time of 6 seconds after it was thrown, the ball is 440 meters above the ground.

{Hope This Helps! :)}

Exactly two rays are required to locate the picture point of the a point object.

No image is created so when object is at the focal point.Lesson 5 has covered this topic, although the refracted beams do not converge or diverge.The light rays cannot create an image since they are moving parallel to one another after refractive error.

The picture is at infinity when the focal point is that object.The picture behind the mirror becomes virtual or upright as the object travels nearer the mirror within the focal point.

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For a process where T1 = 300K, P1 = 100 kPa, and where T2 = 500K, P2 = 650 kPa,  the change in entropy is mathematically given as

S1-S2=-0.0288KJ/Kgk

Generally, the equation for the entropy   is mathematically given as

S1-S2=mcp*lnt2-t1-Rlnt2/t1

Therefore

S1-S2=1+1.004*ln(500/300)-0.287*ln(650/100)

S1-S2=-0.0288KJ/Kgk

In conclusion, Entropy

S1-S2=-0.0288KJ/Kgk

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Complete Question

Air in a piston-cylinder assembly undergoes a process from state 1, where T1 = 300K, P1 = 100 kPa, to state 2, where T2 = 500K, P2 = 650 kPa. Using the ideal gas model for air, determine the change in entropy between the two states, in kJ/kg-K

The change in entropy between the two states, in a piston cylinder assembly, undergoes a process from state 1 where t1=300k is 2.36 kJ/kg K.

The change in entropy can be find out using the following formula,

\(S1-S2=s^oT_1-R\ln \dfrac{p_2}{p_1}\)

Here, (p1 and p2) are the pressure at state 1 and 2 and R is the gas constant. The value of R is,

R=(8.314/28.97).

Air in a piston-cylinder assembly undergoes a process from state 1, where T1 = 300 K, p1 = 100 kPa, to state 2. where T2 = 500 K, p2 = 650 kPa.

Put these values,

\(S_2-S_1=1.70203_1-\dfrac{8.314}{28.97}\ln \dfrac{10\text { bar}}{1\text { bar}}\\S_2-S_1=2.36\rm\; kJ/kg K\)

Thus, the change in entropy between the two states, in a piston cylinder assembly undergoes a process from state 1 where t1=300k is 2.36 kJ/kg K.

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The answers are a) 10cm/hr; b) -40cm/hr. Height of soil column (H) = 40 cm, Cross-sectional area (A) = 100 cm², Water ponded on soil = 10 cm, Volume rate (Q) = 1000 cm³/hr, Downward direction = Steady-state

a) Steady-state flux through the soil is given by the Darcy's law. Darcy's law states that the volume flow rate per unit area is directly proportional to the hydraulic gradient. That is,

Q/A = - K dh/dl Where Q = Volume flow rate, A = Cross-sectional area, K = Hydraulic conductivity, dh/dl = Hydraulic gradient, dh/dl = Change in height/change in length, dh/dl = H/L = 10/40 = 0.25

Substituting the given values, Q/A = - K dh/dl⇒K = - Q/(A dh/dl)⇒K = - 1000 / (100 × 0.25)⇒K = - 4000/100 = - 40 cm/hr

Steady-state flux through the soil = Q/A⇒1000/100⇒10 cm/hr

b) Hydraulic conductivity of the soil can be determined using Darcy's law.

K = - Q/(A dh/dl)⇒K = - 1000/(100 × 0.25)⇒K = - 4000/100K = - 40 cm/hr

Therefore, hydraulic conductivity of the soil is -40 cm/hr.

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Answer:

73.34 mph to 2dp

Explanation:

veolcity = distance/ time

55 / 0.75 = 73.34 mph

Momentum is conserved when carts are collided on a slanting plane.

To find the answer, we need to know about the conversation of momentum.

Thus, we can conclude that the momentum is conserved when carts are collided on a slanting plane.

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Using the thin lens equation:

1/f = 1/do + 1/di

where f is the focal length of the lens, do is the object distance, and di is the image distance.

Plugging in the given values:

1/10 = 1/25 + 1/di

Solving for di:

1/di = 1/10 - 1/25

di = 16.7 cm

Therefore, the image distance is 16.7 cm.

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The raw file size for a 320x240 12-bit thermal image is 115,200 bytes. Thermal images have smaller raw file sizes than digital camera images because they have lower resolution and color depth, resulting in less data being stored.

(i) To calculate the raw file size for a 320x240 12-bit thermal image, we need to consider the number of pixels and the bit depth. Each pixel in a 12-bit image can have 2¹² (4096) possible values.

The total number of pixels in a 320x240 image is 76,800 (320 x 240). Multiplying this by the bit depth, we get:

76,800 pixels x 12 bits/pixel = 921,600 bits

To convert this to bytes, we divide by 8:

921,600 bits / 8 = 115,200 bytes

Therefore, the raw file size for a 320x240 12-bit thermal image is 115,200 bytes.

(ii) The file size of a thermal image compared to a typical commercial digital camera image for the visible range is generally smaller due to a couple of reasons:

1. Resolution: Thermal images typically have lower resolution compared to commercial digital camera images. The example given is a 320x240 image.

While commercial digital cameras often capture images with higher resolutions like 12 megapixels (e.g., 4000x3000 pixels). The higher-resolution images from digital cameras contain more data per image, resulting in larger file sizes.

2. Color Depth: Thermal images are often grayscale or have limited color palettes. They usually use a lower bit depth, such as 12 bits, to represent the temperature variations.

In contrast, commercial digital cameras capture images with higher color depth, such as 24 bits (8 bits per color channel), resulting in more information per pixel and larger file sizes.

In conclusion, the raw file size of a thermal image is generally smaller compared to a typical commercial digital camera image due to lower resolution and color depth, resulting in less data being stored for each image.

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Answer:

v = 17.68 m/s

Explanation:

Given that,

While standing at a crosswalk, you hear a frequency of 510 Hz from an approaching police car.

After the police car passes, its frequency is 460Hz.

We need to find the speed of the police car.

The formula is as follows :

\(v=\dfrac{v_o(f-f')}{f+f'}\)

Put all the values,

\(v=\dfrac{343(510-460)}{510+460}\\\\=17.68\ m/s\)

So, the speed of the police car is 17.68 m/s.

The total maximum daily load (TMDL) standards identify the amount of a particular pollutant that a water body can receive from both point and nonpoint sources.

Total Maximum Daily Load (TMDL) standards are used to identify the maximum amount of a particular pollutant that a water body can receive from both point sources (such as industrial discharge pipes) and nonpoint sources (such as runoff from farms and urban areas).

These standards are established by the Environmental Protection Agency (EPA) under the Clean Water Act and are based on a scientific analysis of the water body and its watershed.

The TMDL standard takes into account the water body's assimilative capacity, which is the amount of pollution that the water body can naturally absorb and still maintain its designated uses, such as providing a habitat for fish and other aquatic life or serving as a source of drinking water.

The TMDL standard is set at a level that will protect the designated uses of the water body while also providing a margin of safety to account for uncertainty in the scientific analysis.

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The block and three cords are shown in the figure below. A block B with a mass of 19.1 kg is suspended from a knot K with a mass of my by means of a cord, which in turn is suspended from a ceiling by two cords with negligible mass the initial and final energies and solving for the unknown mass, my, we obtain my = (1/3)m.

This system's energy changes when the block is lowered to the lowest position, so we can apply the principle of energy conservation to solve for the unknown mass, my.

Using the principle of energy conservation, we can equate the initial energy (when the block is lifted to a height h above the lowest position) to the final energy (when the block reaches the lowest position).

The initial energy is equal to mgh, where m is the mass of the block, g is the acceleration due to gravity, and h is the height of the block above the lowest position.

The final energy is equal to the sum of the kinetic energy of the block and the potential energy of the knot and the cords.The kinetic energy of the block is equal to (1/2)mv^2, where v is the velocity of the block when it reaches the lowest position.

The potential energy of the knot and the cords is equal to the product of the mass of the knot and the acceleration due to gravity, myg, and the distance that the knot and the cords travel when the block is lowered to the lowest position, which is equal to h.

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Velocity is defined as the rate of change of displacement. It's a vector quantity that specifies both speed and direction. The x-component of the velocity vector is 1.3 m/s², and the y-component of the velocity vector is -1.4 m/s².

To determine the direction of the resultant velocity vector with respect to the + x‐axis, we need to calculate the angle made by the vector with the x-axis.

The tangent of the angle is the ratio of the y-component of the velocity to the x-component of the velocity.

tan θ = (-1.4 m/s²) / (1.3 m/s²)
θ = tan⁻¹ (-1.4/1.3)
θ = -49.78°

Therefore, the direction of the resultant velocity vector with respect to the + x‐axis is -49.78°.

Note: The negative sign in the answer represents that the angle is measured clockwise from the + x-axis.

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Answer:

this is were you get everything

Explanation:

Answer:

that's crazy. people really do be thirsty for anything doe.

Explanation:

Answer:

A) R = 190.42 Ω

B) P = 5.325 W

Explanation:

We are given;

Total power;P_tot = 7.1 W

Voltage;V = 26 V

A)We are told that while the battery is still connected, one of the resistors is heated, so that its resistance doubles.

Thus, the power is doubled.

Now, formula for power is;

P = IV

Thus, since power is doubled, we have;

P = 2(IV)

Now, formula for current is; I = V/R

So, P = 2V²/R

Making R the subject, we have;

R = 2V²/P

In this question, P is p_total = 7.1 W

Thus;

R = (2 × 26²)/7.1

R = 190.42 Ω

B) Now, the resistance of the resistors are R and 2R.

Formula for power in this context is;

P = V²/R

Thus,

Total power delivered to the resistors is;

P = V²/R + V²/2R

P = 3V²/2R

P = (3 × 26²)/(2 × 190.42)

P = 5.325 W

Answer: GoodMorning: ) ✨

kilogram (kg)

The SI unit of mass is the kilogram (kg).

Explanation:

Hope this helps: )

Answer:

Some states have greater access to forestry programs than others.

Explanation:

Answer:

125

Explanation:

use the formula e=1/2mv² and use m=10 and v=5

this produces the equation e=1/2x10x25=125

dont forget the units (J) ;)

Answer:

125J

Explanation:

K.e=1/2mv^2

=1/2(10)(5)^2

=125J