A student discovers that sound waves travel 1,687.5 meters in 5 seconds through air at a temperature of 10°C. Based on this information, determine the speed of sound, in m/s, through air at this temperature.

Answer:

B elements

...............

Great Britain's climate is milder than Newfoundland's primarily due to the warming influence of the Gulf Stream, which brings warm tropical waters to the western coast of Europe. Additionally, the surrounding waters and geographical features also have a moderating effect on the climate.

The climate in Great Britain is milder than in Newfoundland due to the influence of the Gulf Stream. This ocean current transports warm water from the tropics northward along the western coast of Europe, which moderates temperatures.

Great Britain benefits from this effect, having a type C climate characterized by more temperate weather despite its northern latitude. On the other hand, Newfoundland, located on the eastern coast of Canada, does not receive the same warming benefits of the Gulf Stream, resulting in harsher winters and a more extreme climate.

Different geographical features also contribute to climatic variations. The presence of surrounding water bodies and the moderating effect of the ocean help to maintain a more stable, moderate climate. Coastal areas are generally warmer in the winter and cooler in the summer due to the ocean's temperature regulating properties. Meanwhile, Newfoundland experiences a colder climate partly because it is further from the moderating influence of the Gulf Stream and also because it is more removed from other major bodies of water compared to Great Britain.

Answer:

Explanation:

Relation between power and illumination and distance  is as follows

[tex]I = \frac{P}{R^2}[/tex]

For first  case

[tex]3600 = \frac{60}{d^2}[/tex]

for second case

[tex]I = \frac{120}{(0.5d)^2}[/tex]

[tex]\frac{I}{3600} = \frac{d^2}{60} \times \frac{120}{.25d^2}[/tex]

I = 3600 x 8

= 28800 lux .

Final answer:

The illuminance on a surface from a 120-Watt bulb at half the distance of an initial setup with a 60-Watt bulb would be 28800 lux, due to the Inverse Square Law for Light and doubling of the bulb wattage.

Explanation:

The question is asking us to determine the illuminance on a surface from a 120-Watt bulb at half the distance of a previous setup with a 60-Watt bulb, which originally had an illuminance of 3600 lux. According to the Inverse Square Law for Light, illuminance changes with the inverse square of the distance. If the distance is halved (d/2), the illuminance increases by a factor of 4 (since (1/0.5)2 = 4). However, since we are also doubling the wattage of the bulb from 60-Watt to 120-Watt, and assuming that the bulb’s efficiency (lumens per Watt) stays the same, the illuminance would double again. Therefore, the new illuminance would be 3600 lux x 4 (due to distance) x 2 (due to wattage), equaling 28800 lux.

Final answer:

The period of oscillation for a small amplitude pendulum with a length of 2.5 meters can be calculated using the equation T = 2π√(L/g). Using the accepted value of g, the period can be determined to be approximately 3.18 seconds.

Explanation:

The period of oscillation for a small amplitude pendulum can be calculated using the equation T = 2π√(L/g), where T is the period, L is the length of the pendulum, and g is the acceleration due to gravity. In this case, the length of the pendulum is given as 2.5 meters. Plugging in the values, we have T = 2π√(2.5/g).

To find the value of g, we can use the accepted value of 9.8 m/s². Calculating T using this value, we can find the period of the pendulum.

Example Calculation:

T = 2π√(2.5/9.8) = 2π√(0.255102) = 2π(0.5051) ≈ 3.18 seconds

Answer: C

Explanation: 1+7 = 6+2 =8 -protons

1+15 = 12+4 = 16 -  protons +neutrons

The complete equation for the given nuclear reaction can be represented as:

[tex]\ce {^{1}_{1}H}+ \ce {^{15}_{7}N}\longrightarrow \; \ce {^{12}_{6}C} + \ce {^{4}_{2}He}[/tex]

In nuclear chemistry, a nuclear reaction can be defined as a nuclear process in which two nuclei and subatomic particles, collide to produce one or more new nuclides. Therefore, a nuclear reaction will be caused a transformation of one nuclide to another nuclide.

The term "nuclear reaction" can be referred either to a change in a nuclide by collision with a subatomic particle or to a spontaneous change of a nuclide without any collision.

The given incomplete reaction can be represented as:

[tex]\ce {^{1}_{1}H}+ \ce {^{15}_{7}N}\longrightarrow \; ? + \ce {^{4}_{2}He}[/tex]

The sum of the mass number on both sides will be equal:

1 + 15 = A + 4

A = 16 - 4

A = 12

The sum of the atomic numbers on both sides of the arrow will be equal :

1 + 7 = Z + 2

Z = 8 - 2

Z = 6

Therefore, the missing nuclide is ¹²C₆. The complete nuclear equation will be written as:

[tex]\ce {^{1}_{1}H}+ \ce {^{15}_{7}N}\longrightarrow \; \ce {^{12}_{6}C} + \ce {^{4}_{2}He}[/tex]

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Answer:

The trajectories and thus the range of the car and the pumpkin are identical.

Explanation:

Trajectory of projectile is given by

[tex]Y=x \tan \theta-\frac{gx^2}{2u^2 \cos \theta ^2}[/tex]

Also range is given by,

[tex]R=\frac{u^2 \sin 2 \theta}{g}[/tex]

Trajectory and path both are independent on mass. Only depends on initial speed u and angle of projection [tex]\theta[/tex]

So Range and Trajectory both will be same.

Identical trajectory and equal range.

Therefore, The trajectories and thus the range of the car and the pumpkin are identical.

Answer:

The trajectories and thus the range of the car and the pumpkin are identical.

Explanation:

Any force that's not cancelled by another force, with identical strength but pointed the opposite way, will cause a change in the object's speed or direction (or both).

When that happens, we say that the forces on the object are "unbalanced", and the object is experiencing "acceleration".

Forces cause changes in an object's motion, including starting movement, changing speed, or altering direction. Types of forces that can initiate these changes are spring forces and applied forces, following Newton's laws of motion.

Forces are essential concepts in physics responsible for causing changes in the motion of objects. They can produce different effects, such as causing an object to start moving, changing its speed or direction, or even deforming it. Types of forces include gravity, spring forces, and applied forces, derived from various actions like pushing, pulling, or thrust.

According to Newton's laws, a force is defined as any interaction that, when unopposed, will change the state of motion of an object. This means that if no other forces are at play, a single force can accelerate an object. Moreover, when a force is applied at an angle to the direction of motion, it can change both the speed (magnitude of velocity) and the direction of the object. The component of force in the direction of motion affects speed, while the perpendicular component affects direction.

An everyday example of force is the action of a garage door opener. When you press the button, your finger is not directly applying force to the door, but it triggers a mechanism that applies force to move the door. Similarly, pulling on a leash exerts force that changes the motion of a reluctant dog; the forces are between the leash and the dog, not directly from your hand.

Answer:

An atom’s emission of light with a specific amount of energy confirms that electrons emit and absorb energy based on their position around the nucleus. The light emitted from an electron is a result of the electron's quantum jumps/leaps ( atomic electron transitions ) to and from different energy levels.

Answer:  Rancho de Area Comunes PV

Explanation: it means

Rancho de Area Comunes PV

In an AC Monte Roca PV System Profile, where the following are depicted:

Location

Commissioning

Production

Operator

PV system power

Module

And communication.

The speed of the pebbles when they hit the window is approximately 7.07 m/s.

Romeo wants to throw pebbles horizontally at Juliet's window. The window is 4.5m above him and 5.0m away from the wall. The pebbles' speed when they hit the window is about 7.07 m/s. This is calculated by determining the time it takes for the pebbles to reach the window vertically, using the equation t = [tex]\sqrt{\frac{2d}{g} }[/tex].

Then, the horizontal velocity is found by dividing the horizontal distance by the time of flight. The overall speed is the square root of the horizontal velocity squared, which is approximately 7.07 m/s.

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Romeo stands 4.5 meters below Juliet's window, 5.0 meters from the wall, and throws pebbles with horizontal velocity. Calculations based on time of flight and Pythagoras yield a speed of approximately 5.21 meters per second at impact.

To find the speed of the pebbles when they hit Juliet's window with only a horizontal component of velocity, we can use the following steps:

Calculate the time it takes for the pebbles to reach the window vertically.

We can use the formula for the time of flight for an object in free fall:

[tex]\[t = \sqrt{\frac{2d}{g}}\][/tex]

Where:

- t is the time of flight.

- d is the vertical distance (4.5 meters in this case, the height of the window).

- g is the acceleration due to gravity (approximately 9.81 m/s² on Earth).

Let's calculate t:

[tex]\[t = \sqrt{\frac{2 \cdot 4.5\,m}{9.81\,m/s^2}}\][/tex]

t is approximately 0.96 seconds.

Calculate the horizontal velocity.

Now that we know the time of flight (t), we can find the horizontal velocity [tex](\(v_x\))[/tex] by dividing the horizontal distance (5.0 meters) by the time of flight:

[tex]\[v_x = \frac{5.0\,m}{0.96\,s}\][/tex]

[tex]\(v_x\)[/tex] is approximately 5.21 m/s.

Calculate the overall speed when the pebbles hit the window.

To find the overall speed (v), we use the Pythagorean theorem because the pebbles' motion consists of both horizontal and vertical components:

[tex]\[v = \sqrt{v_x^2 + v_y^2}\][/tex]

Where:

- [tex]\(v_x\)[/tex] is the horizontal velocity (5.21 m/s, as calculated).

- [tex]\(v_y\)[/tex] is the vertical velocity. Since the pebbles are thrown horizontally, \[tex](v_y[/tex]= 0.

Now, calculate v:

[tex]\[v = \sqrt{5.21\,m/s)^2 + 0^2}\][/tex]

v is approximately 5.21 m/s.

So, the speed of the pebbles when they hit Juliet's window is approximately 5.21 m/s.

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The question probable may be:

Romeo gently throws pebbles at Juliet's window and wants the pebbles to hit the window with only a horizontal component of velocity. He is standing at the end of a rose garden, 4.5 meters below the window and 5.0 meters away from the base of the wall. What is the speed of the pebbles when they hit the window?

Answer:

Forgive me if I'm wrong but I think the answer is C.

Explanation:

I say this because liquid water is H20 (a combination of two elements) and Oxygen is a singular element. Compound is defined as a thing that is composed of two or more separate elements and thus, I think it's C.

The container contains a compound but is is not formed by dissolving oxygen in water. Water itself is a compound. And dissolved oxygen does not make a solution. Thus, option c is correct.

Oxygen is 8th element in periodic table. It is a non-metal and exists in gas form. Oxygen is soluble in water and the dissolved oxygen in water maintains the aquatic life.

A solution is formed by dissolving a solid solute in a solvent. Here, oxygen is in gas form and it  does not form a solution with solvent water. Hence, the container does not containing a solution. After dissolving oxygen no longer exists as an element also.

A compound is formed by the combination of different atoms. Water is a compound formed from hydrogen and oxygens. Water does not form a new compound by dissolving a gas. Thus, the container contains not a new compound but the water itself.

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Answer:

The minimum feature size is 136.6 km.

Explanation:

It is given that,

Distance from planet Mars and Earth is, [tex]D=1.95\times 10^{11}\ m[/tex]

Diameter of the objective lens, d = 0.977 m

We need to find the minimum feature size, on the surface of Mars that your telescope can resolve for you. The expression for resolving distance is given by :

[tex]y=\dfrac{1.22D\lambda}{d}\\\\y=\dfrac{1.22\times 1.95\times 10^{11}\times 561\times 10^{-9}}{0.977 }\\\\y=136603.78\ m\\\\y=136.6\ km[/tex]

So, the minimum feature size is 136.6 km.

Answer:

A

Explanation: The bubbles will shrink , some may vanish. SInce the bottle is unopened , squeezing the bottle will increase the pressure on the ca p.

Answer:

B) The bubbles will grow, and more may appear.

Explanation:

Neither form nor genre usually determines the other. They coexist and influence each other to create diverse literary works. Form is a tool authors use to express their ideas and stories, while genre provides a framework and context within which these ideas are explored.

The relationship between literary form and genre is a nuanced one, and it's not accurate to suggest that one usually determines the other. Instead, they are interrelated but serve different functions in the world of literature.

Form and Genre Defined:

Form: Literary form refers to the structure or style in which a piece of writing is composed. It encompasses elements such as rhyme scheme, narrative perspective, and literary techniques.

Genre: Genre, on the other hand, refers to the category or classification of literature based on shared characteristics and conventions. Common literary genres include fiction, non-fiction, poetry, drama, mystery, romance, science fiction, and more.

Interplay Between Form and Genre:

Form's Influence on Genre: While form can influence genre to some extent (e.g., sonnets are a form often used in love poetry), it doesn't rigidly determine it. Many genres can be written in various forms. For instance, a mystery novel can be written in first-person narrative form or third-person omniscient form.

Genre's Influence on Form: Genre does influence form by setting certain expectations. For example, a sonnet is expected to follow specific rhyme and meter patterns because it's often associated with love poetry.

Synonymy Misconception:

It's incorrect to consider form and genre as synonyms. They are distinct but interconnected aspects of literature.

Literature can exist in various forms within a single genre, and a single form can be used across different genres.

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Form usually determines the genre, with literary form referring to structure and organization, and genre involving characteristics and conventions of a literary work.

The statement that best describes the relationship between literary form and genre is that Form usually determines the genre. Literary form refers to how a narrative is structured and organized, such as through sentences, paragraphs, dialogue, or poetic lines and stanzas. On the other hand, genre is a set of characteristics that make up a type of literary work, which could include conventions, themes, styles, and settings. Genres shape audience expectations and experiences, while forms provide the vessels through which stories are communicated.

For example, fiction is typically written using sentences and paragraphs as its form, expressing stories through prose. Poetry, with its distinct form, utilizes lines and stanzas to create lyrical and rhythmic expressions. Drama, as a form, is predominantly written in dialogue and designed for performance.

The choice of form can influence and sometimes determine the genre, as certain forms fit better with specific genres due to their unique characteristics and reader expectations. Hence, form and genre work together to create a cohesive and identifiable work of literature.

Answer:the answer is c

Explanation:

It balances correctly

psdfAnswer:

Explanation:

Water in a pool can conduct electricity, especially if it has impurities like salt, allowing electric charges to flow through it. This makes it dangerous to place electrical devices near the pool, as they can become pathways for electricity if they get wet, posing a risk of electric shocks.

When Peter's teacher says that water is a conductor, she means that water, especially when it contains impurities like dissolved salts, allows electric charges to flow through it. Thinking of it with an analogy, consider a lake full of fish where the lake represents the conductor and the fish represent the charge carriers. These carriers can move freely within the conductor, just like fish can swim anywhere in the lake, but they typically cannot leave the conductor.

Compared to insulators such as glass, where electrons and ions are bound tightly and cannot move freely, water with impurities such as salt water becomes a conductor, allowing charges to move much more easily. This is why having an electric stereo near a pool is dangerous; if the stereo were to fall in, the electricity could travel through the water and potentially cause harm to anyone in or near the pool.

In electrical terms, a good conductor will have charges quickly spread out and reach equilibrium, meaning any potential difference within a conductor is swiftly eliminated, similarly to how a calm body of water would evenly distribute a drop of water across its surface, with no currents flowing. Therefore, it's important to keep electrical devices away from conductors like a pool of water to avoid the risk of electric shocks or damage.

It will crash at a speed of 5 m/s and that's basically it.

Answer:

Because they don’t happen every month, a lunar eclipse is a special event. Unlike solar eclipses, lots of people get to see each lunar eclipse. If you live on the nighttime half of Earth when the eclipse happens, you’ll be able to see it. Remembering the Difference. It’s easy to get these two types of eclipses mixed up.

Explanation:

Final answer:

Multiple factors, including visibility, atmospheric conditions, and Earth's shadow, can cause each lunar eclipse to look different.

Explanation:

A lunar eclipse can look different each time due to several factors:

These factors combined contribute to the unique appearance of each lunar eclipse, making each one a distinct astronomical event.

Answer:

Any other color, other than Red, Green, and Blue.

Explanation:

Those three are your only primary colors.

Answer:

1.022 x 103 N.m

Explanation:

Solution

Given:

The weight of the block of mass m₂ is :

w₂ = m₂*g

Where

w₂ = 39 x 9.8 = 382.2 N

Then,

The weight of the block of mass m₁

w₁= m₁*g;

so,

w₁ = 12 x 9.8 = 117.5 N

Thus,

The tension wrapped in cord on drum (80 cm) T₁ = F - w₁

Now,

T₁ = 1200 - 117.5

T₁ = 1082.5 N

The tension  wrapped in the cord on drum (41 cm) T₂ = w₂;

T₂ = 382.2 N

Hence,

We calculate net torque on the center of the drum:

The net torque = T₁ x 0.8 + T₂ x 0.41;

= 1082.5 x 0.8 + 382.2 x 0.41;

= 1.022 x 103 N.m

Therefore, the resulting torque applied to the system is 1.022 x 103 N.m

Answer:

The amount of mass that needs to be converted to release that amount of energy is [tex]1.122 X 10^{-7} kg[/tex]

Explanation:

From Albert Einstein's Energy equation, we can understand that mass can get converted to energy, using the formula

[tex]E= \Delta mc^{2}[/tex]

where [tex]\Delta m[/tex] = change in mass

c = speed of light = [tex]3 \times 10 ^{8}m/s[/tex]

Making m the subject of the formula, we can find the change in mass to be

[tex]\Delta m = \frac{E}{c^{2}}= \frac{1.01 \times 10^{3} \times 10^{7}}{(3 \times 10^{8})^{2}}= 1.122 \times 10 ^{-7}kg[/tex]

There fore, the amount of mass that needs to be converted to release that amount of energy is 1.122 X 10 ^-7 kg

Answer:use the triangle formula

Explanation:

Answer:

34.44 g.

Explanation:

The balanced equation for the reaction is:Fe + S → FeS,It is clear that 1.0 mol of Fe reacts with 1.0 mol of S to produce 1.0 mol FeS.We need to calculate the no. of moles of 60 grams of iron and 90 grams of iron sulfide:no. of moles of Fe = mass/atomic mass = (60.0 g)/(55.845 g/mol) = 1.074 mol.no. of moles of FeS = mass/molar mass = (90.0 g)/(87.91 g/mol) = 1.024 mol.∵ Fe reacts with S with (1: 1) molar ratio.∴ The no. of moles of S needed to react with Fe is 1.074 mol.∴ The no. of grams of S needed = no. of moles x molar mass = (1.074 mol)(32.065 g/mol) = 34.44 g.

Answer:

The proposal is not accepted because of greater reduction in work output and efficiency

Explanation:

The following factors influence the turbine output with the suggestion below

1 - Enthalpy at the turbine exit

2 - Heat losses in the turbine

The work output of the steam turbine is

[tex]W=m(h_1-h_2)-Q_{loss}[/tex]

Where,

m is the mass of thee steam flowing through the turbine,

h₁ is the specific enthalpy of the steam leaving the turbine, and

[tex]Q_{loss}[/tex] is the heat loss from the turbinee due to the cooking water.

Enthalpy at the turbine exit; on cooling the turbine with the cooling water, the beck pressure of the turbine is decrease.

this further decrease the specific enthalpy at the turbine exit.

the result is greater reduction in the work output and efficiency,

Heat losses in water in the turbine;

On passing the cooking water around the turbine mst of the heat is carried away by this cooliing water. As the heat losses increases in the turbine, there is a greater reduction in the work output and efficiency.

Therefore, The proposal is not accepted because of greater reduction in work output and efficiency

Although the proposal to cool the steam in the turbine with water might reduce the local entropy, it would not increase the overall work output. Cooling the steam would also decrease its enthalpy and potentially reduce the turbine's output. Instead, optimizing processes to minimize entropy production would be a better way to improve turbine efficiency.

The proposed solution to control the entropy of steam by cooling the steam turbine assumes that reducing both the entropy and enthalpy of the steam at the turbine exit will increase the work output. While it's true that irreversibilities — such as heat transfer and friction — increase the entropy and can reduce the turbine's efficiency, directly cooling the steam in the turbine would not necessarily lead to increased output. This is due to the second law of thermodynamics, which states that the entropy of a closed system will not decrease. Thus, while local entropy may be decreased, the overall entropy in the system (including the cooling water) will still increase.

Moreover, cooling the steam would actually decrease its enthalpy, which would reduce the amount of available energy to perform work, thus potentially decreasing the turbine's output. Therefore, this proposal may not be the best method of increasing the efficiency of a steam turbine. The improvement in turbine efficiency would be better done by optimizing the processes to minimize entropy production as a result of irreversibilities.

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Answer:

Explanation:

According to columbs law;

F = [tex]kq1q2/r^{2}[/tex]

F is the attractive or repulsive force between the charges = 12N

q1 and q2 are the charges

let q1 = - 8.0 x 10^-6 C

q2=?

r is the distance between the charges = 0.050m

k is the coulumbs constant =9*10⁹ kg⋅m³⋅s⁻⁴⋅A⁻²

On substituting the given values

12 = 9*10⁹*( - 8.0 x 10^-6)q2/0.050²

Cross multiplying

[tex]0.03=9*10^{9}* -8.0*10^{-6} q2\\0.03 = -72*10^{3} q2\\q2 = \frac{0.03}{ -72*10^{3}} \\q2 = -4.17*10^{-7}C[/tex]

Answer:

q₂ = + 4.17 x 10⁺⁷ C

Explanation:

From Coulomb's Law, we know that force of attraction or repulsion between two charges is given by:

F = kq₁q₂/r²

where,

F = force = 12 N

k = Coulomb's Constant = 9 x 10⁹ Nm²/C²

q₁ = magnitude of 1st charge = 8 x 10⁻⁶ C

r = distance between charges = 0.05 m

q₂ = magnitude of second charge = ?

Therefore,

12 N = (9 x 10⁹ Nm²/C²)(8 x 10⁻⁶ C)(q₂)/(0.05 m)²

0.03 Nm² = (72000 Nm²/C²)(q₂)

q₂ = (0.03 Nm²)/(72000 Nm²/C²)

q₂ = + 4.17 x 10⁺⁷ C

It is a positive charge, because there is attraction between opposite charges only.

Answer:

The kinetic energy lost by the electron ΔK.E is 3.5244 × 10⁻¹⁵ J

Explanation:

Here we have;

Change in electric potential, ΔV, of the screen = 25000 V

The energy gained by the electron can be derived from the relation of change in electrical potential energy, ΔEPE, as follows;

ΔEPE = -Charge, q × ΔV

Therefore, since charge, q = -1.602 × 10⁻¹⁹ C we have;

ΔEPE = -(-1.602 × 10⁻¹⁹ C) × 25,000 V = 3.5244 × 10⁻¹⁵ C·V =

Also, since the electron is accelerated to the screen by the electrical potential energy, we have;

From the principle of conservation of energy in a given system;

The change in potential energy, ΔEPE of the electrons = Change in kinetic energy, ΔK.E, of the electrons3.5244 × 10⁻¹⁵ J

[tex]\Delta KE = \frac{1}{2} \cdot m \cdot v_f^2 - \frac{1}{2} \cdot m \cdot v_i^2[/tex]

Where:

m = Mass of the electron = 9.11 × 10⁻³¹ kg

[tex]v_i[/tex] = Initial velocity of the electrons = 0 m/s (electrons at rest)

[tex]v_f[/tex] = Final velocity of the electrons

[tex]\therefore \Delta KE = \frac{1}{2} \cdot m \times (v_f^2 - \cdot v_i^2)[/tex]

[tex]\therefore \Delta KE = \frac{1}{2} \cdot m \times (v_f^2 - 0) = \frac{1}{2} \cdot m \cdot v_f^2[/tex]

Hence;

The kinetic energy lost by the electron ΔK.E = ΔEPE = 3.5244 × 10⁻¹⁵ J.

Final answer:

Both the piece of wood and the piece of iron will experience the same buoyancy force because, according to Archimedes' Principle, the buoyant force depends only on the volume of the water displaced, which is equal for both objects since they have the same volume. Option C is correct.

Explanation:

The question asks which one of the two objects held fully under water, a piece of wood or iron with the same volume, will experience the greater buoyancy force upon release.

The answer is c. They experience the same buoyancy force. According to Archimedes' Principle, the buoyant force on an object submerged in a fluid is equal to the weight of the fluid displaced by the object. Since both the piece of wood and the piece of iron have the same volume and are submerged to the same depth, the volume of water displaced by each is the same. Therefore, the weight of water displaced by each object is the same, which means the buoyancy force experienced by both objects is the same, regardless of their densities or materials.

Answer:

unsure

Explanation: