The only sure test for polarity is attraction. True/false​

Buoyant force acts in the opposite direction as the force of

Gravity

If a 71.5 kg gymnast climbs the rope at a constant speed, the tension in the rope is 701.315 N.

To calculate the tension in the rope when a 71.5 kg gymnast climbs at a constant speed, you need to consider the forces acting on the gymnast.

1. Identify the forces acting on the gymnast. In this case, there are two forces: gravity (downward force) and tension (upward force). Since the gymnast is climbing at a constant speed, the net force on her is zero, meaning the forces are balanced.

2. Calculate the gravitational force. Gravitational force (weight) is calculated using the formula: F(gravity) = m * g, where m is the mass of the gymnast (71.5 kg) and g is the acceleration due to gravity (approximately 9.81 m/s²).

F(gravity) = 71.5 kg * 9.81 m/s² = 701.315 N (rounded to 3 decimal places).

3. Determine the tension in the rope. Since the gymnast is climbing at a constant speed and the forces are balanced, the tension in the rope is equal to the gravitational force acting on the gymnast.

Tension = F(gravity) = 701.315 N.

In conclusion, when the 71.5 kg gymnast climbs the rope at a constant speed, the tension in the rope is 701.315 N.

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Answer:

densest: blue; medium dense: clear; least dense: red

Explanation:

i've done this question before :)

Answer:

your getting in the water causes it to make a giant wave

Explanation:

(c) absorb the digested food

Explanation:

It is called villi' in case of human beings.. That's it..

The finger-like outgrowths in the human intestine are called villi, and their main function is to absorb the digested food. Therefore, the option is (c) absorb the digested food.

The villi in the human intestine increase the surface area for absorption, allowing for more efficient uptake of nutrients from the digested food. They contain blood vessels and lymphatic vessels that absorb nutrients such as sugars, amino acids, and fatty acids. The nutrients are then transported to the liver and other parts of the body for use.

The function of villi in humans is to increase the surface area of the small intestine, which allows for more efficient absorption of nutrients from digested food.

Villi are finger-like projections that line the walls of the small intestine, and they are covered in tiny microvilli that further increase the surface area. The villi contain blood vessels and lymphatic vessels that absorb nutrients such as sugars, amino acids, and fatty acids from the digested food.

These nutrients are then transported to the liver and other parts of the body for use. Without villi, the surface area of the small intestine would be much smaller, and the body would not be able to absorb nutrients as efficiently. Hence, option C is correct.

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Answer:

Inertia

Explanation:

The term for the tendency is inertia.

The inertia of a body is the tendency of the body to remain unmoved when at rest and the tendency to keep moving when in motion. In other words, it is the tendency of a body to remain in a state of rest or motion.

A static body will remain in a state of perpetual rest if no force acts on it and a moving body will keep moving in the same direction if no force acts on it. The force that needs to be overcome in order to change the state of the object is otherwise known as inertia force.

The amount of heat transferred from the ocean to the atmosphere as latent heat than sensible heat will be 10 times as much.

Latent heat and sensible heat are defined as follows:

Thus, the amount of heat transferred from the ocean to the atmosphere as latent heat than sensible heat will be 10 times as much.

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ω-transaminase is more selective in the synthesis of amino acid, while normal transaminase is less selective.

Transaminase is an enzyme that transfers an amine group from an amino acid to an α-keto acid, resulting in the conversion of an amino acid to a different amino acid. The ω-transaminase differs from normal transaminase in the selectivity of amino acids synthesized.ω-transaminase is a narrow-range enzyme and is often used to synthesize enantiomerically pure amino acids. Normal transaminase is less selective, synthesizing a variety of amino acids in the reaction.

Way of production of ω-transaminase and normal transaminase: The ω-transaminase and normal transaminase are often produced using genetic engineering techniques. Production methods include mutation, immobilization, or in vitro recombination.

Mutation: Genetic mutations can be introduced to generate ω-transaminase from normal transaminase.Immobilization: Both ω-transaminase and normal transaminase can be immobilized in the matrix to facilitate recovery and reuse of enzymes.

In vitro recombination: In vitro recombination can also be used to produce ω-transaminase.

ω-transaminase is more selective than normal transaminase in the synthesis of amino acids. Both enzymes can be produced through genetic engineering techniques such as mutation, immobilization, or in vitro recombination.

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The pH of the solution is approximately 4.26.

The pH scale is a logarithmic scale that measures the acidity or alkalinity of a solution. It is based on the concentration of hydronium ions ([H3O+]) in the solution. The formula to calculate pH is:

pH = -log[H3O+]

In your case, the concentration of hydronium ions is given as [H3O+] = 5.45 × 10^(-5) M.

To find the pH, we need to take the negative logarithm (base 10) of the hydronium ion concentration. Using a scientific calculator or logarithmic tables, we can calculate:

pH = -log(5.45 × 10^(-5))

The negative sign is included in the formula because the pH scale is defined as the negative logarithm of the hydronium ion concentration.

Evaluating the logarithm, we find:

pH ≈ -(-4.261)

The double negative sign cancels out, resulting in:

pH ≈ 4.261

Therefore, the pH of the solution is approximately 4.261. This indicates that the solution is acidic since a pH below 7 is considered acidic on the pH scale.

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Answer:

2.13 x 10^-5

Explanation:

light travels at 3.00 x 10^8 m/s

it's like if someone asks how long would it take for a car to go 100 miles if it's traveling 50 miles per hour

you would do

100 ÷ 50

6.4 x 10^3 ÷ 3.00 x 10^8

2.13 x 10^-5

The displacement current through the 1-cm^2 area perpendicular to the uniform electric field is 1.33 × 10^-19 A.

The displacement current is given by the equation:

I_d = ε_0 * dΦ_E/dt

Where ε_0 is the permittivity of free space, Φ_E is the electric flux through the area, and dΦ_E/dt is the rate of change of electric flux through the area.

In this case, we have a uniform electric field that is increasing at the rate of 1.5(V/M)/us. The electric flux through a 1-cm^2 area perpendicular to the field is simply the product of the field strength and the area:

Φ_E = E * A

Where E is the electric field strength and A is the area.

Substituting the given values, we have:

Φ_E = (1.5 V/m/us) * (1 cm^2)

Φ_E = 0.015 V/us

Now, we can calculate the displacement current:

I_d = ε_0 * dΦ_E/dt

I_d = (8.85 × 10^-12 F/m) * (0.015 V/us)/(1 × 10^-6 s)

I_d = 1.33 × 10^-19 A

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Take into account that the Newton Second law is given by the following formula:

F = m·a

if you solve the previous formula for a, you obtain:

a = (1/m)·F

In the graph, you can notice that acceleration a is function of force F, just as in the previous formulation. The slope of the lines of the graph is 1/m, where m is the mass.

As you can notice in the formula for a, if m is greater, the slope is smaller.

Then, the blue line belongs to the smallest mass, the gray line belongs to the greatest mass, and the orange line is the middle mass.

Hence, you have:

- blue line - 40 kg

- gray line - 200 kg

- orange line - 100 kg

The maximum percentage of error in the measurement of X is 10%.

So, the correct option is (c) 10%.

To find the maximum percentage of error in the measurement of X, we need to determine how the errors in the measurements of A, B, C, and D affect the calculation of X.

Let's assume that X is calculated using the formula:

X = A + B - C × D

To find the maximum percentage of error in X, we need to consider the worst-case scenario where all the errors add up in the same direction.

Let's calculate the maximum percentage of error step by step:

Percentage error in A = 1%

Percentage error in B = 2%

Percentage error in C = 3%

Percentage error in D = 4%

To calculate the maximum percentage error in X, we'll add up the absolute values of the errors:

Maximum percentage error in X = |1%| + |2%| + |3%| + |4%|

= 1% + 2% + 3% + 4%

= 10%

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True. Electromagnetic waves are a type of energy that can travel through space at the speed of light.

These waves have different wavelengths and frequencies, which determine their properties and behavior. The electromagnetic spectrum includes radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays, each with its own unique frequency and wavelength. The different wavelengths and frequencies of electromagnetic waves give them different properties and uses in various fields, such as communication, medicine, and astronomy. The ability to manipulate electromagnetic waves by adjusting their wavelength and frequency is a fundamental principle behind many modern technologies. Therefore, it is true that electromagnetic waves come in many wavelengths and frequencies.

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Answer:

See explanation

Explanation:

A pure sample is known to give one spot on a chromatogram. This is the first indication that the substance is a pure substance. Since the student saw a single spot, the unknown substance is pure.

Subsequently, the substance can be boiled since it is a liquid. Impure substances boil over a range of temperatures. If the substance is pure, it will have a sharp boiling point which can be compared with boiling points of known substances recorded in literature hence the substance can be correctly identified.

The given unknown material or compound is a pure compound - yes, it has only one spot.

In the given TLC plate there is only one single spot found thus we can say it is the pure compound as If an impurity is present along with the major compound then there we could observe more spots other than the major compound.

The verification of the purity of the sample can be tested by a general procedure

Thus, The given unknown material or compound is a pure compound - yes, it has only one spot.

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Scenario 119 in relation to the question is not provided. In an AC circuit, the formula to determine the power is given as:P = V x I x cos θwhere: P is the power in watts, V is the voltage in volts, I is the current in amperes, and cos θ is the power factor.

However, the voltage is given in the question, which is 480 V, and there is no current or power factor provided in the question. Hence, the answer will be a  which is equal to the power of the boiler in watts when it is connected to a 480-volt circuit.

In an AC circuit, power is defined as:P = V x I x cos θFor this question, the voltage (V) is given as 480V. However, the current (I) and the power factor (cos θ) are not provided. Hence, we cannot directly calculate the power from the equation given above.

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A material that does not conduct electricity is known as an insulator

A material which conducts electricity is called conductor whereas, the materials that does not conduct electricity is called insulators.

There are three types of materials based on the conductivity of them namely conductors, semiconductors and insulators. Conductors are those which conduct thermally and electrically. Materials such as metals are good conductors.

Semiconductors are materials which does not conduct at room temperature but partially conducts at higher temperatures or through doping with other materials. For example silicon, germanium etc.

Materials that does not conduct electricity at all conduct electricity is called insulators. Electrons are unable delocalize through these materials and cannot be made conductive at normal conditions. eg: wood, plastic etc.

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The example that represents the missing organizational level is B. Heart.

Cells are the smallest unit of life and are the basic structural and functional unit of all living organisms. Tissues are groups of cells that work together to perform a specific function.

Organs are made up of tissues that work together to perform a specific function. This is the missing organization level in the given diagram and an example of an organ is the heart.

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If the lead can be extracted with 92.5 efficiency, the mass of ore is required to make a lead sphere with a 7.00 cm radius is 17.707 kg.

To find the mass of ore, the given values are,

The radius of the lead sphere is r = 7.0 cm,

The lead can be extracted with, η = 92.5% = 0.925 efficiency.

Density is the substance's mass per unit of volume.

We know the density of lead as,

⇒ p = 11.4 g/cm³ .

The volume of the lead sphere is,

V = 4/3πr³

   = 4/3π(7)³

V = 1436.7 cm³.

Mass of the lead present in the lead sphere is,

m = p . V

    = 11.4  × 1436.7

    = 16379 g

m = 16.379 kg

From the expression of efficiency, we calculate the mass of the ore,

η = Mass of lead obtained / Mass of the ore to be taken

0.925 = 16.379 kg / Mass of the ore to be taken

Mass of the ore to be taken = 17.707 kg

If the lead can be extracted with 92.5 efficiency, the mass of ore is required to make a lead sphere with a 7.00 cm radius is 17.707 kg.

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User identity refers to the unique characteristics, attributes, and information associated with an individual user within a particular context or system. It typically includes both personal and digital elements that help distinguish and identify the user in various interactions, transactions, or online platforms.

Five authentication factors that can be used to authenticate a user's identity. These factors are:

1. Knowledge: This factor refers to something the user knows, such as a password, PIN (Personal Identification Number), or the answer to a security question.

2. Possession: This factor involves something the user possesses, like a physical token, smart card, or mobile device. It can also include software-based tokens or virtual tokens generated by an authentication application.

3. Inherence: This factor relates to something inherent to the user, typically based on biometric characteristics. Examples of biometric factors include fingerprint scans, iris or retinal scans, voice recognition, or facial recognition.

4. Location: This factor takes into account the user's physical location or the network from which they are accessing a system. It can involve IP address geolocation, GPS coordinates, or proximity to a particular network or device.

5. Time: This factor considers the specific time or time-based criteria for authentication. It can involve time-limited passwords or temporary access codes that expire after a certain duration.

These authentication factors can be used individually or in combination, depending on the level of security required and the specific authentication mechanisms implemented by an organization or system. Different systems may have different requirements and may employ different combinations of these factors to verify a user's identity.

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Answer:

your answer is A

Explanation:

brainliest plzzzz

Answer:

c is the correct answer

The mass of Deimos is approximately 9.52 x 10^15 kg.

To find the mass of Deimos, we can use the formula for gravitational force:F = G * (m1 * m2) / r^2. where F is the gravitational force between two objects, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between their centers of mass.

In this problem, we know the radius of Deimos (r = 6.3 km = 6.3 x 10^3 m), the mass of the rock on its surface (m1 = 3.0 kg), and the gravitational force between them (F = 2.5 x 10^-2 N). We can also look up the value of G: G = 6.674 x 10^-11 N(m/kg)^2.

We want to solve for the mass of Deimos (m2). Rearranging the formula, we get: m2 = (F * r^2) / (G * m1). Substituting the given values, we get: m2 = (2.5 x 10^-2 N) * (6.3 x 10^3 m)^2 / (6.674 x 10^-11 N(m/kg)^2 * 3.0 kg). m2 = 9.52 x 10^15 kg.Therefore, the mass of Deimos is approximately 9.52 x 10^15 kg.

It is worth noting that this calculation assumes that the rock on Deimos' surface is not affecting its orbit significantly. In reality, the gravitational force between the rock and Deimos would cause some perturbations in Deimos' orbit, but they are likely to be very small due to the small mass of the rock compared to Deimos.

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To find the mass of Deimos, we can use the gravitational force formula:
F = G * (m1 * m2) / r^2

Where F is the gravitational force (2.5 * 10^(-2) N), G is the gravitational constant (6.674 * 10^(-11) Nm^2/kg^2), m1 is the mass of Deimos (which we want to find), m2 is the mass of the rock (3.0 kg), and r is the distance between their centers, which is equal to Deimos' radius (6.3 km or 6300 m).

Rearranging the formula to solve for m1 (the mass of Deimos):

m1 = (F * r^2) / (G * m2)

m1 = (2.5 * 10^(-2) N * (6300 m)^2) / (6.674 * 10^(-11) Nm^2/kg^2 * 3.0 kg)

After calculating, we find that the mass of Deimos is approximately 1.0 * 10^15 kg.

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NASA estimates that a white dwarf's surface has 350,000 times as much gravity as Earth has.

If the mass is too enormous (more than 1.4 solar masses, known as the Chandrasekhar limit), a white dwarf star will no longer be in equilibrium between gravity and degeneracy pressure.

Sirius B is smaller than Earth at 7,500 miles (12,000 kilometers) in diameter, but it is more denser. A 150-pound individual would weigh 50 million pounds standing on its surface due to the star's strong gravitational field, which is 350,000 times stronger than Earth's.

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cant really answer here with text but at the top of the slide it should br positives and towards the bottom its negative.

This is because you go faster at the top of the slide than the bottom and when your at the bottom you slow down

Answer:

1) 100 ...unb. and accelerate

2) 7...unb. and accelerate

The analogous dam or canal that controls and directs the flow of passions like a river is referred to as virtue.

When the passions are compared to a river, the general notion is that they are flowing, overflowing and quite strong.They may become dangerous or beneficial. A canal or dam is used to control the water flow of the river in the same way virtue is used to control and direct the flow of our passions. Virtue provides guidance, which can help a person take control of their life and passions.

It can help you to maintain balance and to understand what your desires mean and to guide them in a more positive and constructive direction. Virtue . Virtue is the control and canal that directs the passions’ flow.

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The wavelength of an electron with a velocity of 1.04 x 10^3 m/s is 7.00 x 10^-10 m.

The wavelength of an electron having a velocity of 1.04 \times 10^3 \text{ m s}^{-1}1.04×10 3m s−1 can be calculated as follows :

De Broglie’s relationship states that the wavelength (λ) of a particle is given by λ = h/p, where h is Planck's constant and p is the momentum of the particle. For an electron with a velocity of 1.04 x 10^3 m/s, we can calculate its momentum using the formula p = mv, where m is the mass of the electron. The mass of an electron is 9.10938356 x 10^-31 kg. Therefore,

p = (9.10938356 x 10^-31 kg) x (1.04 x 10^3 m/s) = 9.47 x 10^-28 kg m/s

Now we can use De Broglie’s relationship to calculate the wavelength:

λ = h/p = (6.62607015 x 10^-34 J s)/(9.47 x 10^-28 kg m/s) = 7.00 x 10^-10 m

Therefore, the wavelength of an electron with a velocity of 1.04 x 10^3 m/s is 7.00 x 10^-10 m.

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Answer:

An example of a first class lever in the human body is the head and neck during neck extension. The fulcrum (atlanto-occipital joint) is in between the load (front of the skull) and the effort (neck extensor muscles). The muscles are attached to the posterior part of the skull to allow for the greatest effort arm.

Explanation:

hope this helps. Thank you

Answer:

.98m

Explanation:

Vf=Vi+2at

(V F)^2+2 ( change in distance )

X f= i ( change in V & T )

EK=1/2Mv^2,EG=mgh

This question involves the concepts of the law of conservation of energy, work done, Newton's Second law of motion, and equation of motion.

The box stops at a distance of "1.02 m".

First, we will use the law of conservation of energy to find out the final velocity when the box reaches the flat part.

\(Loss\ of\ Potential\ Energy=Gain\ in\ Potential\ Energy\\mgh=\frac{1}{2}mv^2\\\\2gh=v\\v=\sqrt{2gh}\)

where,

v = speed = ?

g = 9.81 m/s²

h = height = 2 m

Therefore,

\(v=\sqrt{(2)(9.81\ m/s^2)(2\ m)}\)

v = 6.26 m/s

Now, we will use the formula of work done to find out the force applied to the box to stop the motion:

\(W = Fd\)

where,

W = Work Done = 100 J

F = Force applied = ?

d = displacement = 1 m

Therefore,

\(100\ J = F(1\ m)\\F = 100\ N\\\)

Now, we will use Newton's Second Law of Motion to find out the deceleration of the person:

\(F=ma\)

where,

m = mass = 5 kg

a = decceleration =?

Therefore,

\(100\ N = (5\ kg)a\\\\a=\frac{100\ N}{5\ kg}\\\\a = - 20\ m/s^2\)

negative sign shows deceleration.

Now, we will use the third equation of motion to find the distance at which the box stops.

\(2as=v_f^2-v_i^2\\2(-20\ m/s^2)s=(0\ m/s)^2-(6.26\ m/s)^2\\\\s=\frac{40\ m/s^2}{39.24\ m^2/s^2}\)

s = 1.02 m

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The attached picture shows the equations of motion in the horizontal and vertical directions.