a scuba diver and her gear displace a volume of 69.6 l and have a total mass of 72.8 kg. (a) what is the buoyant force on the diver in seawater? (b) will the diver sink or float?

Answer:

Momentum

Explanation:

-Conservation means that any quantity is kept constant.❌

-Force is product of mass and acceleration.❌

-Impulse is product of force and the period of action of the force.❌

-Momentum is the product of mass of a body and it's velocity.✔️

Answer: If the charges were opposite

Explanation:

Opposite charges attract, same charges repel (negative repels negative, positive repels negative), neutral charges have no charge

Force lines, also known as electric field lines, connect two charges when they are opposite in sign. Option C is correct.

Charge is a fundamental property of matter that determines how it interacts with electromagnetic fields. Electric charge is a property of subatomic particles such as electrons and protons. It can be either positive or negative, and like charges repel each other while opposite charges attract each other.

Here,
Force lines, also known as electric field lines, connect two charges when they are opposite in sign. If the charges are both positive or both negative, the electric field lines will diverge away from each other, indicating a repulsive force between them. If the charges are opposite in sign, the electric field lines will converge toward each other, indicating an attractive force between them.

If the charges are neutral, there is no net electric field and thus no electric field lines connecting the charges. However, electric dipoles can still be formed between neutral charges, which can create a non-zero electric field in their surroundings.

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Answer:

The answer is Gravitational pull

The magnitude of the frictional torque required for the axle to maintain static equilibrium in the system is  1.00 N*m

To solve this problem, we need to consider the forces acting on the system.

First, we have the gravitational force acting on each mass. The 0.364 kg mass will experience a force of (0.364 kg)(9.81 \(m/s^{2}\) ) = 3.57 N downwards, and the 0.630 kg mass will experience a force of (0.630 kg)(9.81 \(m/s^{2}\)) = 6.18 N downwards.

Next, we have the tension in the string, which is the same on both sides of the pulley due to the string being inextensible. Let's call this tension T.

Because the pulley has friction in its axle, there will also be a frictional force acting on it. We'll call this force f.

Since the system is in static equilibrium, the net force and net torque must be zero.

Considering the forces in the vertical direction, we have:

T - (0.364 kg)(9.81 \(m/s^{2}\)) - (0.630 kg)(9.81 \(m/s^{2}\)) = 0

Solving for T, we get:

T = 10.35 N

Now considering the torques around the pulley, we have:

(f)(0.095 m) - (T)(0.095 m) + (0.364 kg)(9.81 \(m/s^{2}\))(0.095 m) = 0

Simplifying this equation and solving for f, we get:

f = 1.00 N*m

Therefore, the magnitude of the frictional torque that must be exerted by the axle is 1.00 N*m.  

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Answer:

Explanation:

speed of sound in 24 degrees celsius

345.48m/s

hence 345.48m/s x 3s = 1036.44m

Answer:

 U = 2,195 10⁵ J

Explanation:

The potential energy is

      U = m g and

in this case each person has a mass of 75 kg and the elevator has a mass of 500 kg, the total mass is

 m_total = m_elevator + 4 m_person

      m_total = 500 + 4 75

      m_toal = 800 kg

let's calculate

       U = 800 9.8 28

       U = 2,195 10⁵ J

Georgie did 3,648 Joules of work by pulling her brother and the sled for one block.

The work done by Georgie can be calculated using the formula: Work = Force × Distance. In this case, the force applied by Georgie is 40 N, and the distance covered is 92 m. Therefore, the work done is equal to 40 N × 92 m = 3,648 J.

Work is a measure of the energy transferred when a force acts on an object and causes it to move. In this scenario, Georgie applied a constant force of 40 N to pull her brother and the sled. The work done is directly proportional to the force applied and the distance covered. By multiplying the force and distance values, we find that Georgie performed 3,648 Joules of work.

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Georgie did 3,648 Joules of work by pulling her brother and the sled for one block.

The work done by Georgie can be calculated using the formula: Work = Force × Distance. In this case, the force applied by Georgie is 40 N, and the distance covered is 92 m. Therefore, the work done is equal to 40 N × 92 m = 3,648 J.

Work is a measure of the energy transferred when a force acts on an object and causes it to move. In this scenario, Georgie applied a constant force of 40 N to pull her brother and the sled. The work done is directly proportional to the force applied and the distance covered. By multiplying the force and distance values, we find that Georgie performed 3,648 Joules of work.

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The answer is option (b) irreflexive, i.e., "is not married to." Therefore, we can conclude that the irreflexive is "is not married to".

Here are two relations: "is married to" and "is not married to." Supposing the universe is the set of all living human beings, which of these is irreflexive.

The irreflexive is "is not married to".What is irreflexive. In Mathematics, a binary relation R over a set X is irreflexive if and only if no element of X is associated with itself under the relation. Symbolically, ∀x ∈ X, ¬(xRx).

For example, the "greater than" relation is irreflexive on the real numbers because no real number is ever greater than itself.

What is a binary relation A binary relation R from a set A to a set B is a subset of the Cartesian product A × B, where A and B are arbitrary sets.In this case, the universe is the set of all living human beings.

Therefore, the relation "is married to" is not irreflexive. However, the relation "is not married to" is irreflexive since no human being is not married to themselves.

Thus, the answer is option (b) irreflexive, i.e., "is not married to."Therefore, we can conclude that the irreflexive is "is not married to".

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The relation "is married to" is reflexive, while the relation "is not married to" is irreflexive. Neither relation is symmetric, asymmetric, or antisymmetric.

The relation "is married to" is an example of a reflexive relation, while the relation "is not married to" is an example of an irreflexive relation.

(a) Reflexive: A relation is reflexive if every element in the set is related to itself. In the case of the relation "is married to," every person in the universe of all living human beings is married to themselves. For example, John is married to John, Mary is married to Mary, and so on. This satisfies the condition of reflexivity.

(b) Irreflexive: A relation is irreflexive if no element in the set is related to itself. In the case of the relation "is not married to," no person in the universe of all living human beings is not married to themselves. This means that everyone is married to themselves, which contradicts the condition of irreflexivity.

The relations "is married to" and "is not married to" are not symmetric, asymmetric, or antisymmetric because they do not satisfy the respective conditions for these properties.

(c) Symmetric: A relation is symmetric if for every element (x, y) in the relation, the element (y, x) is also in the relation. In the case of the relation "is married to," if John is married to Mary, it does not necessarily mean that Mary is married to John. Therefore, the relation is not symmetric.

(d) Asymmetric: A relation is asymmetric if for every element (x, y) in the relation, the element (y, x) is not in the relation. In the case of the relation "is married to," if John is married to Mary, it is not possible for Mary to be married to John. Therefore, the relation is not asymmetric.

(e) Antisymmetric: A relation is antisymmetric if for every element (x, y) in the relation, where x is not equal to y, if (x, y) is in the relation, then (y, x) is not in the relation. In the case of the relation "is married to," if John is married to Mary, it is not possible for Mary to be married to John. Therefore, the relation is antisymmetric.

In summary, the relation "is married to" is reflexive, while the relation "is not married to" is irreflexive. Neither relation is symmetric, asymmetric, or antisymmetric.

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Answer:

Given

mass (m) =5kg

velocity (v) =7.3m/s

kinetic energy (k. e) =?

Form

\(k.e = \frac{1}{2} MV {}^{2} \\ = \frac{1}{2} \times 5 \times 7.3 {}^{2} \\ 133.23kj\)

I hope this help

The partial pressure of O2 in the flask at equilibrium is 0.100 atm.

What is the partial pressure of O2 in the flask at equilibrium?

The balanced chemical equation for the reaction between SO3 and O2 is given below:

2SO3(g) ⇌ 2SO2(g) + O2(g)

The expression of the equilibrium constant (Kp) for the given reaction can be expressed as Kp = pO2/(pSO3)2

The value of Kp for the given reaction at the temperature can be given as Kp = (0.500 atm)/(0.100 atm)2Kp = 50.0

Now, we can write the expression for the equilibrium partial pressure of SO2 and O2 as below.pSO2 = 2xPpO2 = x

The partial pressure of SO2 is twice the partial pressure of O2 since the coefficient of SO2 is 2 in the balanced chemical equation. Substituting the above equilibrium partial pressure expressions and Kp in the expression of Kp, we can get the partial pressure of O2 as below.Kp = pO2/(pSO3)2⇒ 50 = x/(2 × 0.100)2⇒ x = 0.100 atm. So, the partial pressure of O2 in the flask at equilibrium is 0.100 atm.

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To signal for help using a convex lens make a makeshift fire or a temporary signal.

With the mirror, reflect sunlight toward any distant observer or passing vessel by aiming the mirror's reflection

Divide the distance between wave crests (15 m) by this relative speed to find the time interval between rocking.

1. To calculate how often wave crests will rock the boat while trolling west, first find the relative speed of the boat to the waves by subtracting the boat's speed (2 m/s) from the wave speed.

Then, divide the distance between wave crests (15 m) by this relative speed to find the time interval between rocking.

2. To signal for help using a convex lens, angle it towards the sun and focus the sunlight to create a bright spot on a surface, like a makeshift fire or a temporary signal.

The description of how I would use the tool to call for help

With the mirror, reflect sunlight toward any distant observer or passing vessel by aiming the mirror's reflection, periodically moving it side-to-side to create a flashing effect, increasing the chances of being noticed.

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The correct answer is D) none of the above.

A sphere of pure U-235 will explode if it is none of the above.

A sphere of pure U-235 will not explode simply by being hot enough, shaken hard enough, or big enough. The explosive potential of U-235 is related to its ability to undergo a nuclear chain reaction. For an explosion to occur, a critical mass of U-235 needs to be present, and the conditions for a sustained nuclear chain reaction must be met.

In a nuclear explosion, the critical mass of U-235 is achieved by bringing together enough fissile material within a short period, typically achieved through processes like implosion or gun-type assembly. External factors such as temperature or physical disturbance alone cannot trigger a nuclear explosion in a pure U-235 sphere.

Therefore, the correct option is D) none of the above.

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Answer:

pressure - A

Friction-E

Force-B

Weight-C

Fluid-D

Explanation: I just remember my vocab words and i had those

Answer:

The answer is d

Explanation:

Because he is from the same species

Answer:

D

Explanation:

The orientation of a close-by second prism to undo this dispersion is an inverted position with apex in the opposite direction

Angle of deviation definition can simply be described as the angle the  between the angle of incidence and the angle of refraction of a ray of light.

If the second prism is placed in an inverted position in relation to the first prism, and its apex also laid into faces the opposite direction, it would refract the dispersed colors of light in an opposite direction.

This leads to the convergence and recombination into white light or a narrow beam, and thus reversing the dispersion.

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Answer:

ok

Explanation:

Have a nice day!

Answer:

Its either 24 or 27 I'm confident its 24 my explanation is that from estimate it's near the 20s

The mass of E is 28/3, and the center of mass is located at (35/36, 0, 7/4).

We can use the triple integral to find the mass and center of mass of the solid E:

The limits of integration for x are from 0 to 5z.

The limits of integration for y are from −1 to 1.

The limits of integration for z are from 0 to 1 − y²

The density function is given by ρ(x, y, z) = 7.

Thus, the mass of E is given by:

M = ∭E ρ(x, y, z) dV

= ∭E 7 dV

= ∫₀⁵z ∫₁⁻¹ ∫₀¹−y² 7 dz dy dx

= 28/3

The x-coordinate of the center of mass is given by:

x-bar = (1/M) ∭E xρ(x, y, z) dV

= (1/M) ∭E x(7) dV

= (1/M) ∫₀⁵z ∫₋₁¹ ∫₀¹−y² x(7) dz dy dx

= 35/36

Similarly, the y-coordinate of the center of mass is given by:

y-bar = (1/M) ∭E yρ(x, y, z) dV

= (1/M) ∭E y(7) dV

= (1/M) ∫₀⁵z ∫₋₁¹ ∫₀¹−y² y(7) dz dy dx

= 0

And, the z-coordinate of the center of mass is given by:

z-bar = (1/M) ∭E zρ(x, y, z) dV

= (1/M) ∭E z(7) dV

= (1/M) ∫0^5z ∫−1^1 ∫0^1−y^2 z(7) dz dy dx

= 7/4

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The correct answer is option c: 79.6 V.

To calculate the output voltage of the transformer, we can use the turns ratio formula:

\( \frac{V_{\text{primary}}}{V_{\text{secondary}}} = \frac{N_{\text{primary}}}{N_{\text{secondary}}} \)

Where:

\( V_{\text{primary}} \) is the primary voltage (input voltage),

\( V_{\text{secondary}} \) is the secondary voltage (output voltage),

\( N_{\text{primary}} \) is the number of turns in the primary winding, and

\( N_{\text{secondary}} \) is the number of turns in the secondary winding.

Plugging in the given values, we have:

\( \frac{118}{V_{\text{secondary}}} = \frac{445}{300} \)

Now, let's solve for \( V_{\text{secondary}} \):

\( V_{\text{secondary}} = \frac{118 \times 300}{445} \)

Calculating this value gives us approximately 79.6 V.

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Answer:

Disk will reach the floor last because it can spend time in the air

Malicious code examples include computer viruses, worms, Trojan horses, logic bombs, spyware, adware, and backdoor programmes that take advantage of common system flaws. Malicious programmes can enter a system through visiting infected websites or by clicking on a dubious email link or attachment.

Viruses, Trojan horses, worms, macros, and scripts are examples of malicious programming. Email attachments, downloading files, and accessing compromised websites may all transmit malicious malware.

Phishing emails are by far the most popular way for hackers and state-sponsored hacking groups to disseminate malware. Hackers have gotten quite good at creating emails that fool recipients into clicking links or downloading files with harmful software.

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The coefficient of static friction for the car not to skid when traveling at 93 km/h on a properly banked curve with a radius of 98 m should be approximately 0.719.

To determine the coefficient of static friction for a car not to skid when traveling at 93 km/h on a properly banked curve with a radius of 98 m, we can use the following formula:

v² / g * R = tanθ + μs

Where:
- v is the velocity of the car (93 km/h)
- g is the acceleration due to gravity (approximately 9.8 m/s²)
- R is the radius of the curve (98 m)
- θ is the angle of banking
- μs is the coefficient of static friction

Since the curve is properly banked, we assume that the angle of banking (θ) is such that the normal force cancels out the vertical component of the car's weight. Therefore, tanθ = 0.

Simplifying the formula, we have:
v² / g * R = μs
Plugging in the given values, we get:
(93 km/h)² / (9.8 m/s²) * 98 m = μs

Simplifying further:
(25.83 m/s)² / 9.8 m/s² * 98 m = μs
μs = (669.13 m²/s²) / (9.8 m/s² * 98 m)
μs ≈ 0.719

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Each scenario affects photographs by altering exposure, contrast, or focus, leading to partial or uneven exposure, decreased sharpness, or distorted images.


a. Half of the lens on your camera is covered by a piece of paper: This will cause uneven exposure, with one half of the image being darker due to the obstruction.
b. The negative is placed in the enlarger with half of it covered by a piece of tape on the inside: This will result in uneven contrast, with half of the image being less detailed and darker due to the blocked light.
c. Half of the lens on the enlarger is covered by a piece of paper: Similar to scenario (a), this will cause uneven exposure in the final print, with one half of the image being darker.
d. The camera lens is replaced by a diverging lens with the same focal length: This will lead to a distorted image, as the diverging lens causes light rays to spread out, resulting in decreased sharpness and focus.

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It is necessary to collimate the light source before using the prisim to  disperse the light so that the light rays entering the prisim are parallel.

What is collimate?

Collimator is a tool for converting a point source's divergent radiation into a parallel beam. To perform specific measurements in spectroscopy, geometrical optics, and physical optics, the light must be collimated.

An optical collimator is made up of a tube with a convex lens at one end and a variable aperture at the other end that is located in the lens' focal plane. To examine the image without parallax, radiation entering the aperture exits the collimator as a parallel beam.

Therefore collimation is needed for the light rays entering the prism to be parallel.

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The greatest horizontal distance it can go from the point of release is about option C: 60m.

The gliding seed here presents a non-uniform mass distribution that allows for an inherently stable flight coupled with one of the lowest terminal velocities between those of plant seeds. The seed does not need gusts or a slight breeze to fly distances of up to hundreds of meters.

The horizontal distance that the seed can travel can be calculated using the following formula:

d = (v²/g) × (L/D) × ln(1 + (v² × (L/D) / g) )

where

d is the horizontal distance traveled by the seed

v is the velocity of the seed

g is the acceleration due to gravity

L/D is the lift-to-drag ratio of the seed

Substituting the given values in the formula, we get:

d = (v²/g) × (L/D) × ln(1 + [v² × (L/D) / g) ]

d = (15.7 × 10⁶ m/s)² / (2 × 9.81 m/s²) × 4.0 × ln(1 + [(15.7 × 10⁶ m/s)² × 4.0 / (2 × 9.81 m/s²)]

d = 60.3 m

Therefore, the greatest horizontal distance it can go from the point of release is about 60m.

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Complete question is:

Consider a gliding seed similar to that of alsomitra macrocarpa. the seed has a mass of 250 mg., a functional lift-to-drag ratio of 4.0, a lift coefficient under the same conditions of 0.3, and a wing area of 5000 mm2. the seed is released 15 m above the ground and reaches its final velocity essentially immediately. in still air, the greatest horizontal distance it can go from the point of release is about:

6m

600m

60m

Answer:

The sun is located in the Milky Way Galaxy.

The principle whereby any single cone system is colorblind, in the sense that different combinations of wavelength and intensity can result in the same response from the cone system, is known as color constancy.

The cone system refers to one of the two photoreceptor systems in the human eye responsible for color vision. Cones are specialized cells in the retina that respond to different wavelengths of light and allow us to perceive color. The cone system is responsible for our ability to see fine detail and color in bright light conditions.

There are three types of cones, each sensitive to a different part of the color spectrum, which combine to allow us to see a wide range of colors. The cone system is most effective in daylight conditions and is responsible for our ability to see color in detail. In dim light conditions, the rod system takes over, allowing us to see in low light but without the ability to perceive color or fine detail.

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All of the below contribute to an increase in carbon levels except D. Photosynthesis.

Carbon is an essential component of life on earth, and its role is crucial in maintaining the balance in the atmosphere. However, increased carbon levels, mainly carbon dioxide (CO₂), pose a threat to our planet and all the living beings on it. Burning fossil fuels, deforestation, and industrial processes are the major contributors to the increased levels of CO₂ in the atmosphere. Hence, humans play a significant role in climate change. However, the process of photosynthesis can reduce the carbon levels in the atmosphere as it involves absorbing CO₂ from the air and converting it into oxygen (O₂) and glucose.

Breathing is the process where humans and animals take in oxygen and release CO₂ into the atmosphere. Although breathing increases the levels of CO₂ in the atmosphere, it is not considered a significant contributor to the increased carbon levels. Decay of vegetation contributes to the increase in carbon levels as it releases CO₂ into the atmosphere during the process. Petrol burning releases CO₂ into the atmosphere and contributes significantly to climate change. Therefore, the correct answer to this question is option D, photosynthesis

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In the case of a paramecium moving at a constant speed, there is no net force acting on it.

The paramecium's cilia exerts a force on water that is equal to the force that the water exerts on the paramecium's cilia, according to Newton's third law.

The strength of the viscous force the water is exerting on the paramecium will be equal to the strength of the force the paramecium's cilia are exerting on the water.

How does Paramecium use cilia?

Cilia, or tiny strands like hair, cover the whole surface of parasites like cilia, which beat rhythmically to move them and guide bacteria and other food particles into their mouths.

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Answer:

b i. The curve would be less steep than both of the graphs.

c. The temperature was the same at the start of the experiment so that the only variable changed in the experiment would be the thickness of the walls and the change in temperature can be measured from the same starting temperature, ensuring a fair experiment.

Explanation:

b i. Since you know that a thicker wall conducts heat from the inside room to the surroundings slower (based on my previous answer ;)), heat from the room would be conducted to the surroundings by the thicker wall slower and the temperature change will be less drastic and the graph would be less steep.

c. In an experiment, only one independent variable can be changed and we would normally record the dependent variable to get a conclusion for the experiment as the dependent variable is the variable that is affected by the independent variable. We should not change any other variable in the experiment, such as the starting temperature of the experiment.

For e.g. If you want to find out how the amount of water affects a plant's growth, the amount of water would be the independent variable and that would be the only thing you would change in that experiment. During the experiment, you would record the dependent variable, which is the height of the plant. The type of plants used and the type of soil..etc should be kept the same/constant so that it is a fair experiment, as a better type of soil may make the plant grow taller.