The statement by Newton that "for every action there is an opposite but equal reaction" is regarded as which of his laws of motion?A. firstB. secondC. thirdD. fourth

As the physical spacing of the distance between water molecules changes, the density of the water may change too.

A substance's density is determined by how much mass it has per unit of volume. In other words, it is a measure of how much matter is contained in a certain amount of space. The density of a substance can be influenced by various factors, including temperature and pressure. In the case of water, changes in temperature can lead to changes in the physical spacing between water molecules. When water is heated, the individual water molecules begin to move more quickly, which increases the average distance between them. This increase in the space between the water molecules leads to a decrease in the overall density of the water. As a result, hot water is less dense than cold water. Conversely, when water is cooled, the individual water molecules slow down, which decreases the average distance between them. This decrease in the space between the water molecules leads to an increase in the overall density of the water. As a result, cold water is more dense than hot water. In summary, as the physical spacing of the distance between water molecules changes, the density of the water may change too. This relationship between temperature and density is one of the unique properties of water that is critical to many biological and ecological processes.

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Answer:

I prefer online because I get social anxiety and I have seizures and ptsd episodes, so I'd just much rather be online

Answer:

v = 6t² + t + 2, s = 2t³ + ½ t² + 2t

59 m/s, 64.5 m

Explanation:

a = 12t + 1

v = ∫ a dt

v = 6t² + t + C

At t = 0, v = 2.

2 = 6(0)² + (0) + C

2 = C

Therefore, v = 6t² + t + 2.

s = ∫ v dt

s = 2t³ + ½ t² + 2t + C

At t = 0, s = 0.

0 = 2(0)³ + ½ (0)² + 2(0) + C

0 = C

Therefore, s = 2t³ + ½ t² + 2t.

At t = 3:

v = 6(3)² + (3) + 2 = 59

s = 2(3)³ + ½ (3)² + 2(3) = 64.5

Answer:

a

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The answer is D, ethical concerns.

Good luck on the Unit Test, fellow edge.nuity user.

Heat transfer is limited to conduction and radiation only in anomalous expansion of water simply because of the temperature at which the expansion occurs and density

Anomalous expansion of water is a property of water in which water expands instead of contracting.

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The shot hits the ground with a speed of approximately 10.54 m/s.
To find the speed at which the shot hits the ground, we can analyze the horizontal and vertical components of its motion.

Given:

Initial velocity (v₀) = 20 m/s

Height (h) = 1.8 m

Launch angle (θ) = 30 degrees

Acceleration due to gravity (g) = 9.8 m/s²

First, we can find the time it takes for the shot to hit the ground by analyzing its vertical motion. Using the equation of motion:

h = v₀ᵧ * t - (1/2) * g * t²

where v₀ᵧ is the initial vertical component of velocity. Since the shot is launched horizontally, v₀ᵧ = 0. Therefore, we can simplify the equation to:

h = -(1/2) * g * t²

Solving for t:

t² = (2h) / g

t = √((2 * 1.8 m) / 9.8 m/s²)

t ≈ 0.608 s

Next, we can find the horizontal component of velocity (vₓ) using the initial velocity and launch angle:

vₓ = v₀ * cos(θ)

vₓ = 20 m/s * cos(30°)

vₓ ≈ 17.32 m/s

Finally, we can find the speed at which the shot hits the ground by multiplying the horizontal component of velocity by the time of flight:

Speed = vₓ * t

Speed = 17.32 m/s * 0.608 s

Speed ≈ 10.54 m/s

Therefore, the shot hits the ground with a speed of approximately 10.54 m/s.
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Answer:

False

Explanation:

Answer: 10

Explanation:

Answer:

Which sentence best states the central idea of paragraphs 21-22 in "Energy Story"?

A. Materials that are insulators and conductors have a high

resistance to electricity.

Part B

Which sentence from "Energy Story" best supports the answer in Part A?

B. "Its resistance measures how well something conducts

electricity."

Explanation:

Answer:

C

Explanation:

Answer:

if an object starts from rest it's initial velocity is zero

The balloon with total average density of 0.2ρ in the air surrounding the balloon with a density of ρ, the balloon will follow a straight path toward the north and angled upward.

Density is defined as the substance's mass per unit of volume and is the measurement of how tightly a material is packed together. The mean or average density is the total mass of a region divided by the total volume of that region. Based on the provided density of the gas filled in the balloon which is 0.2p, the gas-filled balloon is less dense than the air whose density is p, there would be an upward force exerted on it. As the breeze exerts a northward force, there would be a net force exerted on the balloon that is upward and to the north, which causes the balloon to move straight in that direction.

Note: The question is incomplete. The complete question probably is: A gas-filled balloon has a total average density of 0.2ρ. The air surrounding the balloon has a density of ρ. The balloon is released from rest in a constant horizontal breeze directed north. If air resistance is negligible, what is the shape of the path followed by the balloon?

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The statement "When a permanent magnet is cut in half, one piece will be a north pole and one piece will be a south pole" is False.

When a permanent magnet is cut in half, it does not result in separating the magnet into distinct north and south poles. Instead, each resulting piece will still have its own north and south poles. This phenomenon is known as magnetic domain alignment. The domains within a magnet are regions where the magnetic moments of atoms align in the same direction, creating a magnetic field. Cutting a magnet disrupts the alignment of these domains, but it doesn't create isolated north and south poles on separate pieces.

Regardless of how a permanent magnet is divided, each resulting piece will have its own north and south poles. The magnetic field lines will still flow from the north pole to the south pole within each piece. Therefore, the statement "When a permanent magnet is cut in half, one piece will be a north pole and one piece will be a south pole" is false.

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The complete question is

which of the following statements concerning permanent magnets is false?- the direction of a magnetic field is indicated by the north pole of a compass-when a permanent is cut in half, one piece will be a north pole and one piece will be a south pole-the north pole of a permanent magnet is attracted to a south pole-magnetic field line outside a permanent magnet originate from the north pole and end on the south pole-all permanent magnets are surrounded by the magnetic field

When a material is reflective, it would cause the light that meets it to bounce off while a transparent material would make the light to pass through it.

Light is a form of energy that produces a sensation that is visible to the optical eye. We know that a material is said to be transparent if the material can allow light to pass through it. A material is said to be reflective when it bounces off the rays of light that fall on it.

We can see that when light interacts with the transparent material, the light can pass through the material. If the light interacts with the reflective material then the light rays are seen to bounce off the light rays.

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The equation for the position vector r(t) of the particle at time t is :r(t) = 3i + 8j + 8k + (7i + 0j + 0k)t + (5/2i + 1/2j - 2k)t²

Given,Initial velocity, v0= 7 m/s

Final velocity, v = ?

Acceleration, a= 5i + j - 4k

Time, t = ?

Distance between the points, d= √(8 - 3)² + (9 - 8)² + (4 - 8)²

                                                    = √25 + 1 + 16

                                                    = √42 m

We know that,v = v0 + at

On substituting the given values in the above equation, we get,

7 + a×t = v

⇒ v = 7 + (5i + j - 4k)×t

Now, the equation of motion can be given by the following equation,r(t) = r0 + v0t + 1/2at²

Here,r0 = (3i + 8j + 8k) is the initial position of the particle

On substituting the given values in the above equation, we get,

r(t) = 3i + 8j + 8k + (7i + 0j + 0k)t + (5/2i + 1/2j - 2k)t²

Hence, The particle's location vector at time t is represented by the equation:r(t) = 3i + 8j + 8k + (7i + 0j + 0k)t + (5/2i + 1/2j - 2k)t²

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The initial speed of a 0.5 kg arrow when it is fired from the bow is equal to 20 m/s.

Kinetic energy can be described as the energy carried by a moving body due to its motion. Work should be done on the object in order to bring the change in the kinetic energy of a moving object.

The kinetic energy of an object can be determined from the mathematical formula:

K.E. = ½ mv²    

Where ‘v’ is the object's velocity and ‘m’ is the object's mass.

Given, the mass of the arrow, m = 0.5 Kg

The work done = kinetic energy = 100 J

The kinetic energy = (1/2)× m ×(v)²

100 = (1/2)× 0.5 ×(v)²

v² = 400

v = 20 m/s

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Answer:

Release

Explanation:

The water is heated until

Given:

The mass of the ball is

The initial height of the ball is

The initial speed of the ball is

To find:

the impact speed of the ball when it strikes the ground

Explanation:

The initial potential energy of the ball is

The initial kinetic energy is

The final energy of the ball is fully kinetic energy. Let the final impact speed of the ball is

We can write, using the energy conservation principle that

Hence, the final impact speed of the ball is 46.1 m/s.

EAC( Low-energy lightbulb )=18.47 EAC( Conventional lightbulb )=7.33 Conventional lightbulb is cheaper to operate. Option D

To calculate the Equivalent Annual Costs (EAC), we need to consider the initial cost, maintenance costs, and the present value of future costs, taking into account the discount rate.

The EAC (Equivalent Annual Cost) is calculated by summing up the annual costs of the lightbulb over its lifetime, discounted at the real discount rate of 4%.

For the low-energy lightbulb:

EAC = Cost of bulb + Present value of annual electricity cost

= $3.60 + ($2.00 / (1 + 0.04)^1) + ($2.00 / (1 + 0.04)^2) + ... + ($2.00 / (1 + 0.04)^9)

≈ $18.47

For the conventional lightbulb:

EAC = Cost of bulb + Present value of annual electricity cost

= $0.60 + ($7.00 / (1 + 0.04)^1) + ($7.00 / (1 + 0.04)^2) + ... + ($7.00 / (1 + 0.04)^1)

≈ $7.33

Since the EAC for the low-energy lightbulb is $18.47 per year and the EAC for the conventional lightbulb is $7.33 per year, the conventional lightbulb is cheaper to operate assuming a burnt-out bulb is replaced by an identical bulb.

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To cause pressure and temperature to become directly proportional instead of just having a direct relationship, we need to consider the ideal gas law.

The ideal gas law is an equation that describes the relationship between the pressure (P), volume (V), temperature (T), and number of moles (n) of an ideal gas.

The ideal gas law, states: PV = nRT

where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature.

In the ideal gas law, pressure (P) and temperature (T) are related indirectly, meaning that when one increases, the other decreases (assuming other variables are constant).

To make pressure and temperature directly proportional, we can introduce a new factor that would modify the relationship between them. One way to achieve this is by considering a different equation of state, such as the Van der Waals equation:

(P + an²/V²)(V - nb) = nRT

where a and b are constants specific to the gas being considered.

The Van der Waals equation introduces additional terms (an²/V² and nb) that account for intermolecular forces and the finite size of gas particles. These additional terms modify the relationship between pressure, volume, and temperature, allowing pressure and temperature to become directly proportional under certain conditions.

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To keep the seesaw balanced, the torque on both sides of the pivot must be equal. Assuming that the pivot is in the middle of the seesaw, the torque on the left side of the pivot must be equal to the torque on the right side of the pivot.
The torque is calculated by multiplying the force by the distance from the pivot. Since the seesaw is balanced, the total force on each side of the pivot must be equal. Let's call this force "F".
On the left side of the pivot, we have a 4.0 kg cat standing at a distance "d" from the pivot. The torque on this side is then: T_left = F * d

On the right side of the pivot, we have an unknown weight (let's call it "W") standing at a distance "x" from the pivot. The torque on this side is:
T_right = F * x
Since the seesaw is balanced, T_left = T_right. Therefore:
F * d = F * x
Dividing both sides by F:
d = x

So the distance the cat must stand from the pivot is equal to the distance the unknown weight is from the pivot. We don't know the weight or the distance, but we know that they must be equal. The cat must stand the same distance from the pivot as the unknown weight. We don't know the exact distance, but it must be equal to keep the seesaw balanced.

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Answer:

The answer to your query would be the Second Answer Choice.

Explanation:

> We can find that this is the answer by using the process of elimination. A quick explanation of this is marking the answers that don’t make sense so we know they can’t be the answers. Let’s do this,

> As for “It is a noncontact force”, this is correct, as gravity does not require contact, nor is it possible to come into contact with gravity. This is correct, so this is not our answer. Remember we are trying to find which is NOT correct.

> As for “It depends on speed”, this is not correct, as gravity does not rely or take in the speed or velocity of an object. If something were to be going 100 MPH , it would be feeling the same gravitational force as something standing still. This is most likely our answer, although we may find another one, so we cannot assume.

> As for “It depends on mass”, this is a correct statement, as the more mass something has, the more gravity acts upon it. If something were to have no mass, there would be no gravity on that object. Once again, since we are looking for something that is NOT correct, this is not our answer.

> As for “It depends on distance”, this is also a correct statement, as the further away something is, the less the gravity of another object acts upon it. The closer, and the more it acts upon it.

> Since the only thing we found to be NOT true (and therefore matching the description of the question) was “It depends on speed”, that is our answer to the question.

> I hope the successfully answered your question and any more queries on the subject you may have had. #LeariningWithBrainly

Answer:

B

Explanation:

It depends on speed. This is not true. Guy above explains it very well.

Answer:

The correct answer is B. a nucleus surrounded by electrons.

The answer is heat flow.

When two systems in contact are not at the same temperature, heat flow occurs.

What is heat flow?

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Answer:

Explanation:

When two systems in contact are not at the same temperature, Heat flow occurs.

more info:-

The correct answer to the given question is -6.944 * 10^-28 Joules

a. To find the electron's initial speed, we can use the conservation of energy. The initial kinetic energy of the electron must equal the final potential energy of the electron at its closest approach to the sphere.

Ki = 1/2 * me * v^2

v = sqrt(2Ki/me)

Ki = qe * V = (1.6 x 10^-19 C) * (-4.4 x 10^-9 C) = -6.944 x 10^-28 J

b. At the point where the speed of the electron is half of its initial value, the kinetic energy of the electron is half of its initial value. Therefore,

Ki/2 = 1/2 * me * (v/2)^2

we can solve for the distance from the surface of the sphere using the same equation as in part a, and substituting Ki/2 and v/2 for Ki and v respectively

c. The acceleration of the electron at its turning point can be found using the equation for centripetal acceleration:

a = v^2/r

where a is the acceleration, v is the speed of the electron, and r is the distance of the electron from the center of the sphere at its closest approach. We can use the value of v from part a and the distance from part b to find the acceleration.

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Explanation:

What we know:

Sa + Sb = 350 km

Ta + Tb = 4h

S = Vt

With these equations above we can write a system of equations and find Tb, as you see in the picture(s).

After having Tb you can easily find Ta and then Sa and Sb. Hopefully it was clear.

The water outflow in 30 secs through 200 mm of the capillary tube is mathematically given as

\(Qo=1.6 \times 10^{2} \mathrm{~mL}\)

\(\begin{aligned}\Delta P &=6660 \mathrm{~m} / \mathrm{m}^{2} \\\mu &=8.01 \times 10^{-4} \text { Pas } \\t &=30 \mathrm{~s} \\L &=200 \mathrm{~mm}=200 \times 10^{-3} \mathrm{~m} \\D &=1.5 \mathrm{~mm}=1.5 \times 10^{-3} \mathrm{~m} \Rightarrow \gamma=\frac{1.5 \times 10^{-3}}{2} \mathrm{~m}\end{aligned}\)

Generally, the equation for Rate of flow of Liquid is  mathematically given as

\(\\$$Q=\frac{\pi r^{4} \times \Delta P}{8 \mu L}\)

$$

Where dP is pressure difference r is the radius

\(\mu\) is the viscosity of water

L is the length of the pipe

\(Q=\frac{\pi \times\left(\frac{1.5 \times 10^{-3}}{2}\right)^{4} \times 6660}{8 \times 8.01 \times 10^{-4} \times 200 \times 10^{-3}}\)

\(Q=5.2 \mathrm{~mL} / \mathrm{s}\)

In $30s the quantity that flows out of the tube

\(&Qo=5.2 \times 30 \\&Qo=1.6 \times 10^{2} \mathrm{~mL}\)

In conclusion, the quantity that flows out of the tube

\(Qo=1.6 \times 10^{2} \mathrm{~mL}\)

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