what is the density, in kilograms per cubic meter, of the woman? this could be measured by placing her in a tank with marks on the side to measure how much water she displaces when floating and when held under water (briefly).

ANSWER:

4 sec

STEP-BY-STEP EXPLANATION:

Given:

Mass (m) = 50 kg

Speed (v) = 2.5 m/s

Work (W) = 4900 J

Speed is constant then a = 0

Net applying force = 0 N

We make the vertical force balance:

Now we calculate the distance:

Now, we calculate the time using the speed formula:

The time of the elevator trip is 4 seconds

The acceleration of the object would be found to stay the same.

Let us note that the acceleration would have to do with the rate at which the velocity of the object would change with time. In the case that we have here, we can see that there is a point where the net force is the same as we can see on the graph.

We know that it is a change in the net force that is acting on the object that would cause the object to be accelerated as such if the net force stays as a constant then the acceleration of the object would also stay the same.

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The statement is true. ions are free to move when dissolved in water.

As solids, ionic compounds won't conduct electricity. This is because ions are organized in an ionic lattice, which prevents them from moving freely within a solid. Conduction happens when an ionic substance is dissolved in solution or molten because the ionic lattice is broken, allowing the ions to move about freely. Ionic compounds do not conduct electricity when they are in the solid state because there are no free electrons and no chances for ions to form. Whenever ionic chemicals are melted or dissolved in water, an electric current is produced. The B ions migrate toward the positive electrode in an ionic solution, while the A+ ions migrate toward the negative electrode.

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Answer:

The answer is Pascal or Pa.

Answer:

Pa or small p

Explanation:

Force over Area. The SI unit is Pascal

1. The phrase "What if we were alone?" is repeated in the title and the questions in the first stanza. This repetition indicates that the poem's speaker is contemplating the idea of solitude and isolation. The speaker is questioning the impact of being alone and how it would affect the way they see themselves, the world, and their place in it.

2. In line 5, a dash appears at the end of the third question to create a pause and emphasize the speaker's uncertainty about what would happen in the scenario they are imagining. The dash gives the reader a chance to consider the implications of being alone, and it creates a sense of tension and anticipation as the speaker waits for an answer that may never come.

3. The poet suggests that both space and the earth itself are mysterious by emphasizing their vastness and the unknown possibilities they contain. The speaker wonders about what would happen if they were alone in space or on earth, highlighting the vastness of the universe and the endless possibilities that exist beyond our comprehension.

4. The human need for connection and the fear of being alone. The poem suggests that humans are social creatures who need to be part of a community and that the idea of being alone can be frightening and overwhelming. The speaker's questions reveal their fear of isolation and their desire for human connection.

5. In the first stanza, the "words of the wiser" are spoken by Galileo. In the final stanza, the "wise" words belong to the speaker themselves. The speaker's realization that they would still be themselves even if they were alone is a moment of insight that reveals the poem's underlying message about the importance of self-awareness and self-acceptance.

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complete question: “WHAT IF WE WERE ALONE?” Poem by William Stafford 1. Infer What phrase is repeated in the title and the questions in the first stanza? What does this repetition indicate about the poem’s speaker? 2. Interpret In line 5, why do you think a dash appears at the end of the third question? 3. Compare How does the poet suggest that both space and the earth itself are mysterious? 4. Draw Conclusions What do you think is the theme of “What If We Were Alone?” Why do you think so? 5. Notice & Note In the first stanza, you read some “words of the wiser” as spoken by Galileo. Whose “words” are described in the final stanza? What makes these “wise” words, too?

Answer:

80:20

20/20=1

80/20=4

he doges 4 in 1 second

Explanation:

Hope this helps! =D

Both Paula and Ricardo will have equal momentum after the push-off.

According to Newton's third law of motion, for every action, there is an equal and opposite reaction. When Paula and Ricardo push off from each other, they exert equal and opposite forces on each other. Since momentum is the product of mass and velocity (momentum = mass × velocity), the momentum of both skaters will be equal and opposite in direction. This is due to the law of conservation of momentum, which states that the total momentum of a closed system remains constant.

Despite Ricardo weighing more than Paula, both ice skaters will have equal momentum after the push-off, but in opposite directions. This is due to Newton's third law of motion and the conservation of momentum principle.

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Answer:

410–460 g (14–16 oz) and is inflated to 65.7–68.8 kPa (9.5–10.0 psi).

Explanation:

A sum-to-product formula to rewrite cos 4 bcosb as a product

cos(4b)cos(b) can be written as a product of cos(5b) and cos(3b):

cos(4b)cos(b) = 0.5 [cos(5b) + cos(3b)]

To rewrite cos(4b)cos(b) as a product using a sum-to-product formula, we can use the formula:

cos(A)cos(B) = 0.5 [cos(A + B) + cos(A - B)]

Applying this formula, we have:

cos(4b)cos(b) = 0.5 [cos(4b + b) + cos(4b - b)]

Simplifying further:

cos(4b)cos(b) = 0.5 [cos(5b) + cos(3b)]

Therefore, cos(4b)cos(b) can be written as a product of cos(5b) and cos(3b):

cos(4b)cos(b) = 0.5 [cos(5b) + cos(3b)]

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The phrase "like dissolves like" can be described as the compounds which have similar nature dissolve in each other that is polar dissolves polar and non-polar dissolves non-polar molecules.

Polarity is the separation of electric charge which is leading to a molecule or the chemical groups which are having an electric dipole moment, with a negatively charged end and a positively charged end as well. Polar molecules are the molecules which must contain one or more polar bonds which occur due to a difference in the electronegativities between the bonded atoms of the molecule.

A simple way to predict the compounds which will dissolve in other compounds is the phrase of the compound such as "like dissolves like". This means that the polar compounds dissolve in polar compounds, and the nonpolar compounds dissolve in nonpolar compounds, however, the polar and nonpolar molecules do not dissolve in each other.

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Answer:

1. Aristotle

2. Thales of Miletus

Explanation:

1. Answer: The first professor who implemented a scientific approach in order to investigate a problem was Aristotle(384-322 BC)

Aristotle was a student under Plato, he pioneered the scientific method in ancient Greece.

2. Answer: The father of scientific mythology was

Thales of Miletus  (c. 624/623-c. 548/545 BC)

Thales was a Greek mathematician, astronomer, and pre-socratic philosopher, Asia minor.

Answer:

270 s or 4.5 min

Explanation:

First find the amount of heat needed:

q = mCΔT

q = (1.5 kg) (4200 J/kg/K) (100 − 15) K

q = 535,500 J

q = 535.5 kJ

Power is energy per time.

P = E / t

2 kW = 535.5 kJ / t

t = 270 s

Let's explain why Common Emitter (CE) configuration is preferred over Common Collector (CC) for amplification purposes.

Common Emitter amplifier is an amplifier that offers high current gain, medium input resistance and high output resistance.

Common Collector is another type of amplifier where the input signal is applied to the base and the ouput signal is taken from the emitter.

The Common Emitter configuration is preferred over the Common Collector configuration because the Common Emitter offers a high power gain(high voltage and current gain), and has a lower resistance when compared to the Common Collector configuration.

ANSWER:

The common Emitter configuration has higher voltage and current gain when compared to the Common Collector configuration.

Answer:

120

Explanation:

KE = (mv^2)/2

= ((0.15)(40)^2)/2

= ((0.15)(1600))/2

= 240/2

Answer:

they have the same atoms

Answer:

To the Left

Explanation:

Answer:

the velocity is 4 ms, if it asked for change it be 0 m/s but its asking for velocity so option 4, 4m/s

Explanation:

The correct answer is Option 2: 2 m/s². The acceleration of the object at 8 seconds is 2 m/s². Note that the negative sign indicates that the acceleration is in the opposite direction of the velocity.

To calculate the acceleration of the object at 8 seconds, we need to look at the change in velocity over time (acceleration is the rate of change of velocity).

Given the graph, we can see that at 8 seconds, the velocity of the object is 6 m/s.

Now, let's find the change in velocity between 8 seconds and 10 seconds:

Change in velocity = Final velocity - Initial velocity

Change in velocity = 2 m/s - 6 m/s

Change in velocity = -4 m/s

Next, find the time interval between 8 seconds and 10 seconds:

Time interval = Final time - Initial time

Time interval = 10 s - 8 s

Time interval = 2 seconds

Now, calculate the acceleration:

Acceleration = Change in velocity / Time interval

Acceleration = (-4 m/s) / (2 s)

Acceleration = -2 m/s²

The correct answer is Option 2: 2 m/s². The acceleration of the object at 8 seconds is 2 m/s². Note that the negative sign indicates that the acceleration is in the opposite direction of the velocity.

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The magnitude of the centripetal acceleration of the car is 0.0314 m/s².

centripetal acceleration

Centripetal acceleration is described because the assets of the motion of an item, traversing a circular path. Any object that is shifting in a circle and has an acceleration vector pointed in the direction of the center of that circle is referred to as Centripetal acceleration.

a = v²/ r

r = 3500 m (SI unit)

t = 200 s

circumference = C

C = 2 * π * r

C = 2 * 3.141 * (3500 m)

C = 21987 m

v = D / t

v = (21987 m) / (200 s)

v = 109.935 m/s

a = (109.935 m/s)² / (3500 m)

a = (109.935 m/s²) / (3500 m)

a = 0.0314 m/s²

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Answer:

15.1 m/s²

Explanation:

Step 1: Calculate the force exerted by the friction

Friction exerts a force against the direction of the movement. On a horizontal plane, we can calculate the value of that force using the following expression.

Ff = μ × m × g

where,

μ: coefficient of kinetic friction

m: mass of the block

g: gravity

Ff = 0.50 × 10 kg × 9.81 m/s² = 49 N

Step 2: Calculate the resulting force

The horizontal force F and the friction force Ff are vectors that act in opposite directions. We can calculate the resulting force (R) by doing the subtraction.

R = F - Ff = R = 200 N - 49 N = 151 N

Step 3: Calculate the acceleration of the block

We will use Newton's second law of motion.

R = m × a

a = R/m

a = 151 N/10 kg = 15.1 m/s²

Answer:

the molecules form new chemical bonds

Explanation:

The circumstance which will not occur when water undergoes a physical change is that the molecules form new chemical bonds. Thus, the correct option for this question is B.

Physical change may be defined as a type of change within the compound or things that significantly do not change the chemical properties of the matter. It usually involves the process of transition from one state to another.

When water undergoes a physical change means liquid to solid, solid to liquid, or gas, the motion of the molecules, kinetic energy, and density alter with respect to the state of matter. So, all these attributes are classified into the category of physical change.

Therefore, the molecules forming new chemical bonds is the option that will not occur at any point in time when water undergoes a physical change. Thus, the correct option for this question is B.

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Answer:

The chemical and physical processes that change objects on Earth's surface over time are called weathering .  Over thousands of years, weathering breaks up rocks into smaller pieces.

b. Mechanical weathering,Chemical makeup,Surface area,clay,ice wedging expands, abrasion

   there all in order btw

Answer:

My teacher said 36m when I asked her

Explanation:

HOPE THIS HELPS!!

Ultra = X-ray

Explanation:

how are things going to paint the roof for beginners painting and decorating the whole house so I'm going away with a few sports mates for a couple nights for beginners but will have a look painting at a time and see what is going to be Strong enough

Answer:

C

Explanation:towards Erin

The rope will move towards Erin because, the force between them is unbalanced and the more force is exerted by Erin. Hence, the displacement will occur on the greater force side.

Force is an external agent acting on a body to change its motion or to deform it. The net force acting on the body depends on the direction and magnitude of all  the force acting on it.

If two equal forces acts on the body from the same side they add up together and the net force is their sum. If the forces are acting from the opposite sides, they will cancel each other and is said to be balanced.

Here, two forces from the side is un balanced by a force from the opposite side. Hence, the greater force from Erin will make the rope displaced towards her side. Thus, option C is correct.

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Wavelength of the light that is received by the observer on the Earth is 5.4 x 10⁻⁷m.

a) Speed of the galaxy, v = 3.9 x 10⁴ m/s

Speed of light, c = 3 x 10⁵ m/s

Wavelength of the light emitted from the galaxy, λ = 6.2 x 10⁻⁷m

(i) The expression for the change in wavelength of the light that is received by the observer on the Earth is given by,

Δλ = (v/c)λ

Δλ = (3.9 x 10⁴/3 x 10⁵) 6.2 x 10⁻⁷

Δλ = 8.06 x 10⁻⁸m

(ii) Wavelength of the light that is received by the observer on the Earth,

λ' = λ - Δλ

λ' = 5.4 x 10⁻⁷m

b) Redshifts have been observed for almost all galaxies. When light from far-off galaxies travels from the galaxy to our telescopes, it is stretched (made redder) by the universe's expansion, which is known as "cosmological redshift".

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Please find attached photograph for your answer.

Hope it helps.

Do comment if you have any query.

Hydrolysis is a chemical reaction in which water is used to break down complex molecules into simpler ones.

This process is more common in a humid or wet climate. In such climates, water is readily available and tends to accumulate in soils and rocks, leading to the formation of aqueous solutions. These solutions can then react with various minerals and organic compounds, promoting hydrolysis. Moreover, the presence of high temperatures and abundant vegetation in tropical climates accelerates the process of hydrolysis.

This results in the decomposition of organic matter, which releases nutrients and minerals that can support plant growth. Overall, hydrolysis plays a crucial role in many environmental processes and is particularly important in regions with high moisture levels.

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Water is utilised in a chemical procedure called hydrolysis to convert complicated molecules into simpler ones.

A humid or moist climate favours this procedure more frequently. In such environments, water is easily accessible and has a propensity to build up in rocks and soils, resulting in the creation of aqueous solutions. The subsequent reactions between these solutions and different minerals and organic molecules can encourage hydrolysis. Additionally, tropical areas' high temperatures and plenty of flora hasten the hydrolysis process.

This causes organic materials to decompose, releasing nutrients and minerals that can help plants flourish. Overall, hydrolysis is critical to many environmental processes and is especially significant in areas with high levels of moisture.

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