please I'm so hurry
What is it answer this question ?

A disk rotates with rotational kinetic energy is 70J and the angular momentum is 30 kg.m2/s .what is the value moment of inertia the disk?
A) 6.4 kg.m2
C) 40 kg.m2
B) 2.3 kg.m2
D) 0.43 kg.m2​

The ostrich and dolphin are tied for the fastest, with a speed of 20 m/s, while the swallow is slower with a speed of 17 m/s.

To compare the speeds of the ostrich, dolphin, and swallow, we need to convert their speeds to the same units. Let's convert all speeds to meters per second (m/s):

Now that we have all speeds in the same units, we can compare them directly. We can see that both the ostrich and dolphin have a speed of 20 m/s, while the swallow has a speed of 17 m/s.

Therefore, the ostrich and dolphin are tied for the fastest, with a speed of 20 m/s, while the swallow is slower with a speed of 17 m/s.

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Conduction: One example of a situation where heat flowed through conduction in the last 24 hours is when I held a hot mug of tea. As I grasped the mug, the heat from the hot liquid transferred to the ceramic material and then to my hand through direct contact.

This heat transfer occurred due to the conduction of thermal energy from the higher temperature object (the tea) to the lower temperature object (my hand) via physical contact. Convection: An example of heat flowing through convection in the last 24 hours is when I used a fan to cool down a room. As the fan circulated the air in the room, it facilitated convective heat transfer. The fan helped displace the warmer air near me and replaced it with cooler air, creating a convection current that carried away the excess heat and promoted a cooling effect.  Radiation: Throughout the day, I experienced heat flowing through radiation when I stood under the sun. The Sun emitted radiant energy, including visible light and infrared radiation. As these electromagnetic waves reached the Earth, they transferred heat energy to my body without the need for direct contact or a medium. The sensation of warmth on my skin was a result of the thermal energy absorbed from the Sun's radiation.

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The velocity of the money at the given price, and amount of money in the time frame is 6.75.

The velocity of money is a measurement of the rate at which money is exchanged in an economy.

It is the number of times that money moves from one entity to another.

It also refers to how much a unit of currency is used in a given period of time.

MV = PY

V = PY/M

where;

Substitute the given parameters and solve for velocity;

V = (2.25 x 6000) / 2000

V = 6.75

Thus, the velocity of the money at the given price, and amount of money in the time frame is 6.75.

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The rest energy of the carbon nucleus is \(1.49 * 10^-^1^0 joules\).

The rest energy of a particle is given by the famous equation of Albert Einstein, \(E = mc^2\), where E is the energy, m is the mass, and c is the speed of light.

Given the mass of the carbon nucleus, we can calculate its rest energy as follows:

\(E = mc^2\)

\(E = (1.66 * 10^-^2^7 kg) * (299,792,458 m/s)^2\)

\(E = 1.49 * 10^-^1^0 J\)

Therefore, the rest energy of the carbon nucleus is \(1.49 * 10^-^1^0 joules\).

This result demonstrates the enormous amount of energy contained within the mass of even a small nucleus.

The rest energy of a nucleus is often released or absorbed in nuclear reactions, such as in nuclear power plants, nuclear weapons, and natural phenomena like radioactive decay.

The relationship between mass and energy is a fundamental concept in modern physics and has far-reaching implications in fields such as particle physics, cosmology, and astrophysics.

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\(\huge\mathfrak\red{answer}\)

Jake was playing making a paper airplane, after making he kept it on the table and went to have food.

Suddenly his brother saw the plane and threw it in the air, The airplane kept flying for about 3m/s and it hit his mother and due to the force the plane stopped.

{kept in on the table>rest

brother threw the plane>moving

it hit his mother>force that stopped it}

(mark me brainliest if you're satisfied with my answer)

\(\large\sf\red{thank \: you}\)

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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Answer:

The natural amount of ozone layer present is enough to block the UV rays coming from the sun. A change in its amount means that there's a portion in that layer where those harmful UV rays could enter since it lacks the required amount of ozone to block it.

The UV rays from the sun are sufficiently blocked by the ozone layer's natural presence. A change in its concentration indicates that there is a spot in that layer where those dangerous UV rays could enter, since it doesn't have enough ozone to stop it.

The presence of airborne gases such as carbon dioxide, methane, and vapor causes the greenhouse effect, which warms both the surface and troposphere. Water vapor seems to have the greatest impact of these so-called greenhouse gases.

The atmosphere allows the majority of the sun's visible light to pass through this and reach the surface of the Earth. When the Earth's surface becomes heated by sunlight, some of this energy is radiated back into space as infrared. In contrast to visible light, this radiation has a tendency to be collected by the green house gases, increasing its temperature.

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The car alarm has to reach at least 75 sound units for people to perceive it as louder.

The Weber-Fechner law states that a noticeable increase in the intensity of a stimulus is proportional to the logarithm of the increase in the physical intensity. When it comes to sound, the law says that if a sound gets louder, people will only notice a difference if the change in volume is big enough.

To calculate the minimum increase in the volume required for a sound to be perceived as noticeably louder, we can use the formula for the Weber-Fechner law: V' = V * 10^(1/10) where,

Let's say that a car alarm is sounding off at 60 units of volume. To find the minimum increase in the volume required for the car alarm to be perceived as noticeably louder, we can plug in the initial volume into the formula:

V' = 60 * 10^(1/10)

= 60 * 1.25992105

= 75

So, according to the Weber-Fechner law, the car alarm would have to reach at least 75 units of volume for people to perceive it as noticeably louder.

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The distance between the two buses is 48km.

Let us assume that the velocity of the first bus is 36 km/h and that of the second bus is 108 km/h.

To find the distance between them, we will consider that both buses move in opposite directions.

Distance travelled by bus 1 in 20 minutes = 36 km/h × 20 min ÷ 60 min/h = 12 km

Distance travelled by bus 2 in 20 minutes = 108 km/h × 20 min ÷ 60 min/h = 36 km

Total distance between them = distance travelled by bus 1 + distance travelled by bus 2= 12 km + 36 km= 48 km

Therefore, the distance between them in 20 minutes is 48 km.

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Explanation:

T=1/f

So if frequency increases the period will decrease

Answer:

44.13015

Explanation:

use the 9.8067 newtons to 1 kg conversion

The force exerted on the bucket by the rope is  44.1 N.

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. A spring balance can be used to calculate the Force. The Newton is the SI unit of force.

Given parameters:

weighs  of the bucket: M = 4.50 kg.

We know that acceleration due to gravity: g = 9.8 m/s².

Hence, gravitational force acting on the bucket in downwards = Mg

= 4.50 kg × 9.8 m/s²

= 44.1 N.

Hence, pulling up a bucket at a constant speed, the person have to exert 44.1 N force on the bucket by the rope  so that it can nullify gravitational force acting on the bucket in downwards.

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When Fez engages in team activities such as running or passing the ball, they are maintaining tension with an equal force on all sides.

Any physical object that is in contact with another one can apply forces to that object. The pulling force transmitted axially by a string, cable, chain, or other similar object, or by each end of a rod, truss member, or other similar three-dimensional object is referred to as tension. The action-reaction pair of forces acting at each end of said elements can also be referred to as tension.

The force produced when a load is applied at one or more of the ends of a material in a direction away from the material's cross-section is known as the tension force. It's common to describe a tension force as a "pulling" force. To exert a tension force on the material, the load must be applied axially.

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Explanation:

In short, when we switch off a branch, the remaining branch still forms a complete circuit with the battery, so electricity still pass through the remaining branch.

Technically speaking, the voltage in each branch is the same, and the resistance of the light bulb remains unchanged (neglect effect of temp.) by V=IR, the current should remain unchanged after switching off the other branch.

A common activity like cooking a meal can use many natural Ingredients

Ingredients are substances combined to make a particular mixture such as a meal. most of the ingredients used for the preparation of a meal are sourced naturally.

In cooking different recipes of a meal the use of specific ingredients for each recipe differentiates the recipes.

Therefore we can conclude that cooking a meal requires the use of natural ingredients.

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The depth of a thermocline is directly influenced by all the following factors except a. wave action. A thermocline is the layer of water where temperature changes rapidly. It separates the upper mixed layer from the deep water of the ocean.

Below the thermocline, the water temperature decreases more slowly with depth.A thermocline is a distinct layer in a large body of water, like a lake or ocean. The depth of a thermocline is determined by several factors, including the input of solar radiation, the influx of water, and wind speed. When solar radiation enters a body of water, it heats the surface water, creating a warm layer on top. As water evaporates from the surface, it cools and becomes denser. The denser water sinks, and a vertical circulation pattern is established, creating a thermocline.

Thermoclines are important for marine life. Many fish and marine animals live in the upper mixed layer and need to access the surface to breathe. Other animals, like whales and dolphins, dive deeper to find food. Understanding the depth and location of the thermocline is important for managing marine resources and understanding the impact of human activities on the ocean. The depth of a thermocline is directly influenced by all the following factors except a. wave action.

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A) The contact area between each tire and the road is 7.50 m².

B) The answer is: Increase.

C) The gauge pressure is 6.49 lb/in².

Given information:

A) Gauge pressure of the car tire, p = 43.5 lb/in2

The mass of the car, m = 1250 kg

Contact area, A = ?

Pressure required to get contact area, p₁ = ?

The formula for calculating the contact area between the tire and the road is:

A = (2*m*g)/(p*d) Where,

g = acceleration due to gravity = 9.8 m/s²

d = number of tires = 4

From the formula,

B) Contact area between each tire and the road is:

A = (2*m*g)/(p*d)

  = (2*1250*9.8)/(43.5*4)

  = 7.50 m²

The contact area between the tire and the road increases when the gauge pressure is increased.

C)  To calculate the gauge pressure required to give each tire a contact area of 114 cm², we have:

114 cm² = 114/10,000

            = 0.0114 m².

A = (2*m*g)/(p*d)

=> p = (2*m*g)/(A*d)

Gauge pressure required to give each tire a contact area of 114 cm² is:

p₁ = (2*m*g)/(A*d)

   = (2*1250*9.8)/(0.0114*4)

   = 4,480,284.03 Pa

   = 6.49 lb/in².

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To find the work Hector does to stop the boat with passengers aboard, we can use the work-energy principle, which states that the work done is equal to the change in kinetic energy. In this case, Hector needs to do 1.728 kJ of work to stop the boat.


1. Calculate the initial kinetic energy of the boat using the formula: KE = 0.5 * m * v^2
  where KE is kinetic energy, m is mass (2400 kg), and v is velocity (1.2 m/s).

  KE_initial = 0.5 * 2400 * (1.2)^2
  KE_initial = 0.5 * 2400 * 1.44
  KE_initial = 1728 J (joules)

2. The final kinetic energy of the boat is zero since it is stopped.

3. The work done by Hector to stop the boat is the change in kinetic energy, which can be found by subtracting the final kinetic energy from the initial kinetic energy:
  Work = KE_initial - KE_final
  Work = 1728 J - 0 J
  Work = 1728 J

4. Convert the work done from joules to kilojoules by dividing by 1000:
  Work_kJ = 1728 J / 1000
  Work_kJ = 1.728 kJ

Hector needs to do 1.728 kJ of work to slow down and bring the boat with passengers aboard to a stop.

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Answer:

3.6

Explanation:

plz mark brainliest | (• ◡•)|

A flywheel of mass 3. 0g consist of a flat uniform disc of radius 0. 40m. It pivots about central axis perpendicular to its plane, moment of inertia: 2.4 x 10⁻⁴ kg m².

A) To calculate the moment of inertia of a flat uniform disc, we use the formula: I = (1/2) * M * R², where I is the moment of inertia, M is the mass, and R is the radius.

Given the flywheel's mass (3.0g) and radius (0.40m), first convert the mass to kilograms: 3.0g = 0.003 kg. Then, plug the values into the formula: I = (1/2) * 0.003 kg * (0.40m)².

The moment of inertia of the flywheel is approximately 2.4 x 10⁻⁴ kg m².

B) When a torque of 6.8 Nm acts on the flywheel, it causes angular acceleration, which can be calculated using the formula: τ = I * α, where τ is the torque, I is the moment of inertia, and α is the angular acceleration.

Rearrange the formula to find α: α = τ / I. Plugging in the values, we get: α = 6.8 Nm / (2.4 x 10⁻⁴ kg m²). The angular acceleration of the flywheel is approximately 2.83 x 10⁻⁴ rad/s². This means the flywheel will experience a significant increase in angular velocity due to the applied torque.

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The tension in each arm of the boy is 240.1 N.

Tension force is the force developed when force is applied on one or more ends of some material. E.g string, rope, or wire.

The Tension in each arm of the boy can be calculated using the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1.

Hence, The tension in each arm of the boy is 240.1 N.

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Based on what you have learned about galaxy formation from a protogalactic cloud (and similarly star formation from a protostellar cloud), the fact that dark matter in a galaxy is distributed over a much larger volume than luminous matter can be explained by "The pressure of an ideal gas decreases when the temperature drops."

(II)How is this true?

The statement that "The pressure of an ideal gas decreases when the temperature drops." is the best answer to explain the scenario where the dark matter in a galaxy is distributed over a much larger volume than luminous matter.

In general, dark matter makes up about 85% of the universe's total matter, but it does not interact with electromagnetic force. As a result, it cannot be seen directly. In addition, it is referred to as cold dark matter (CDM), which means it moves at a slow pace. This is in stark contrast to the luminous matter, which is found in the disk of the galaxy, which is very concentrated and visible.

Dark matter is influenced by the pressure created by the gas and stars in a galaxy. If dark matter were to interact with luminous matter, it would collapse to form a disk in the galaxy's center. However, the pressure of the gas and stars prevents this from occurring, causing the dark matter to be spread over a much larger volume than the luminous matter.

The pressure of the gas and stars, in turn, is determined by the temperature of the gas and stars. When the temperature decreases, the pressure decreases, causing the dark matter to be distributed over a much larger volume. This explains why dark matter in a galaxy is distributed over a much larger volume than luminous matter.

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The magnitude of force exerted on the woman by the floor when the lift is accelerating is 150 Newton.

Given the following data:

To calculate the force exerted on the woman by the floor when the lift is accelerating, we would apply Newton's Second Law of Motion:

Mathematically, Newton's Second Law of Motion is given by this formula;

\(Force = mass \times acceleration\)

Substituting the given parameters into the formula, we have;

\(Force = 60 \times 2.5\)

Force = 150 Newton.

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The angle at which a 2.20 µm wide slit produces its first minimum for 410 nm violet light can be calculated using the equation for the first minimum in a single slit diffraction pattern. The equation is given by:

sinθ = (m * λ) / w

Where:
θ is the angle of the first minimum
m is the order of the minimum (in this case, m = 1 for the first minimum)
λ is the wavelength of the light (410 nm, which is equal to 410 * 10^(-9) m)
w is the width of the slit (2.20 µm, which is equal to 2.20 * 10^(-6) m)

we have:

sinθ = (1 * 410 * 10^(-9)) / (2.20 * 10^(-6))

Calculating this expression, we find:

sinθ ≈ 0.1864

To find the angle θ, we can take the inverse sine (sin^(-1)) of 0.1864:

θ ≈ sin^(-1)(0.1864)

Using a calculator, we find:

θ ≈ 10.7°

Therefore, the angle at which the 2.20 µm wide slit produces its first minimum for 410 nm violet light is approximately 10.7°.

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Rounding this value to the nearest 0.1°, the angle at which the first minimum occurs for the 2.20 µm wide slit with 410 nm violet light is approximately 93.2°.

Explanation :

The angle at which the first minimum occurs for a slit can be calculated using the formula:

θ = λ / (2 * a)

Where θ is the angle, λ is the wavelength of the light, and a is the width of the slit.

Given that the width of the slit is 2.20 µm and the wavelength of the violet light is 410 nm (or 410 x 10^-9 m), we can substitute these values into the formula:

θ = (410 x 10^-9) / (2 * 2.20 x 10^-6)

Simplifying this expression:

θ = 0.00041 / 0.0000044

θ = 93.18 degrees

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The absence of net filtration pressure (NFP)can impact the filtration of substances, toxins in the blood, and urine composition.

a) A net filtration pressure of O is low since it indicates no pressure gradient favoring filtration. Ideally, the NFP should be positive to facilitate the filtration process.

b) With a NFP of O, the filtration of substances out of the blood would be impaired. Normally, a positive NFP helps drive fluid and solutes across the filtration membrane, allowing filtration to occur.

c) In terms of toxins in the blood, a NFP of O would result in higher levels of toxins since filtration is not effectively removing them from the blood. Without a positive pressure gradient to promote filtration, toxins may accumulate in the bloodstream.

d) The urine of this person would likely show higher levels of toxins and waste products. With a lack of filtration due to the absence of NFP, these substances would remain in the bloodstream and eventually be excreted in the urine.

e) There can be several reasons leading to a NFP of O, including kidney dysfunction, obstruction in the filtration pathway, or low blood pressure. Any condition or factor that disrupts the normal filtration mechanisms or compromises the pressure gradient can result in a NFP of O.

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For the given statement the Electric flux through the surface is 0.54 N m 2 /C.

Note: we are considering the distance between two charges to be 0.1 m

Electric flux in electromagnetism is a measurement of the electric field passing through a certain surface. The SI unit for the scalar quantity known as electric flux is newton-meters squared per coulomb (N m 2 /C). N · m 2 /C )

The electric flux passing through a surface can be calculated using the equation:

Φ = E * A = (k * q1 + k * q2) / r^2 * A

k = Coulomb's constant = 8.99 x 10^9 N * m^2 / C^2

r = distance between the charges = 0.1 m

A = surface area = 0.1 m * 0.1 m = 0.01 m^2

Now if we calculate:

Φ = (k * q1 + k * q2) / r^2 * A =  [(0.01 m^2)]* [(8.99 x 10^9 N * m^2 / C^2) *( 6.8 x 10^-12 C)] + [(8.99 x 10^9 N * m^2 / C^2) * (2 x 10^-12 C)] / (0.1 m)^2 = 0.54 N * m^2 / C.

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Answer:    

   1. The death penalty should be abolished.

   2. Human cloning should be legalized.

   3. All drugs should be legalized.

   4. Animal testing should be banned.

   5. Juveniles should be tried and treated as adults.

   6. Climate change is the greatest threat facing humanity today.

   7.  Is There Life After Death?

   8. Is Evolution or Creationism the Truth?

Explanation:

A circular loop of wire is lying flat on a horizontal table in an external magnetic field, and you are looking down at it. There is an induced clockwise current in the loop. If the external field is directed upward toward you, then what is happening to the magnitude of this external field is that it is increasing. (Option A)

A changing magnetic field causes an induced current. The induced current is accompanied by an induced emf. A current can be generated in the absence of a battery in the circuit. The induced emf is described by Faraday's law of induction.

The generation of an electromotive force across an electrical conductor in a changing magnetic field is known as magnetic induction. Induction was discovered in 1831 by Michael Faraday, and James Clerk Maxwell mathematically characterized it as Faraday's law of induction.

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Full Question:

A circular loop of wire is lying flat on a horizontal table in an external magnetic field, and you are looking down at it. There is an induced clockwise current in the loop. If the external field is directed upward toward you, then what is happening to the magnitude of this external field?

A. Increasing

B. Decreasing

C. Not changing

D. Not enough information given

E. None of the above