A dead body floats in water with its head immersed why?​

Answer:

\(part \: \to a \: \\ \boxed{\gamma = 1.17 { \times 10}^{ - 6} \: m}

\\ \\ part \to\: b \\ \boxed{the \: ans = 355,102,030.67 \: or \: 3.55 { \times 10}^{8} \: times}\)

Explanation:

\(\boxed{part \: a.} \\ let \: the \: radio \: wave \: length \: be \to \gamma _{r} \: \\ given \to \: v = f \gamma _{r} \: \\ the \: wave \: length \: \boxed{\gamma _{r} } \: is \to \: \frac{v}{f} \\ \gamma _{r} = \frac{v}{f} = \frac{350}{3 { \times 10}^{8} } = 1.1666667 { \times 10}^{ - 6} \\ \boxed{\gamma _{r} = 1.17 { \times 10}^{ - 6} \: m} \\ \\ \boxed{part \: b.}\\ let \: the \: water \: wave \: length \: be \to \gamma _{w} \: \\ to \: answer \: the \: second \: question : \\ first \: we \: find \: the\: frequency \: of \: the \\ \: water \: wave \to \\ \: if \: \to \: v = f\gamma _{w} \\ f = \frac{v}{ \gamma _{w}} \\ but \:\gamma _{w} \: is \: 1\% \: of \: \gamma _{r} \\ \gamma _{w} = \frac{1}{100} \times 1.1666667 { \times 10}^{ - 6} \\ \gamma _{w} = \underline{ 1.1666667 { \times 10}^{ - 8}}m \\ hence \to \\ f_{w} = \frac{v}{ \gamma _{r}} = \frac{1450}{1.1666667 { \times 10}^{ - 8}} \\ = \boxed{part \: a.} \\ let \: the \: radio \: wave \: length \: be \to \gamma _{r} \: \\ given \to \: v = f \gamma _{r} \: \\ the \: wave \: length \: \boxed{\gamma _{r} } \: is \to \: \frac{v}{f} \\ \gamma _{r} = \frac{v}{f} = \frac{350}{3 { \times 10}^{8} } = 1.1666667 { \times 10}^{ - 6} \\ \boxed{\gamma _{r} = 1.17 { \times 10}^{ - 6} \: m} \\ \\ \boxed{part \: b.}\\ let \: the \: water \: wave \: length \: be \to \gamma _{w} \: \\ to \: answer \: the \: second \: question : \\ first \: we \: find \: the\: frequency \: of \: the \\ \: water \: wave \to \\ \: if \: \to \: v = f\gamma _{w} \\ f = \frac{v}{ \gamma _{w}} \\ but \:\gamma _{w} \: is \: 1\% \: of \: \gamma _{r} \\ \gamma _{w} = \frac{1}{100} \times 1.1666667 { \times 10}^{ - 6} \\ \gamma _{w} = \underline{ 1.1666667 { \times 10}^{ - 8}}m \\ hence \to \\ f_{w} = \frac{v}{ \gamma _{r}} = \frac{1450}{1.1666667 { \times 10}^{ - 8}} \\ \boxed{f_{w} = 124,285,710,735} \\now \: thier \: frequency \: ratio \: is \to \\ \frac{f_{w}}{f_{r}} = \frac{124,285,710,735}{350} = 355,102,030.67 \\ \boxed{the \: ans = 355,102,030.67 \: or \: 3.55 { \times 10}^{8} \: times}\)

The speed of the rocket alpha when observed from rocket bravo is 1.42c.

The rocket alpha is moving with a speed of 0.90c and the rocket named bravo is travelling with a speed of 0.52c.

Both the rockets are moving with a same line towards a head on collision.

Both the speed of the rocket is observed from the frame of earth,

when the frame of reference is the rocket bravo,

So, the rocket bravo is moving itself and the rocket alpha will appear towards it with a greater velocity.

So, if V₁ is the speed of Rocket alpha and V₂ is the speed of the rocket bravo,

So, V₁₂ is the speed of rocket alpha from rocket bravo,

V₁₂ = 0.52-(-0.90)

V₁₂ = 1.42c

So, the speed of the rocket alpha from rocket bravo is 1.42c.

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Pressing a lever in the box's corner is the sole method to get rid of the shocks. The rat picks up pressing the lever quite quickly. This is an illustration of negative reinforcement.

The technique of negative reinforcement can be applied to aid in teaching particular actions.

When something unpleasant or uncomfortable is taken away in response to a stimulus, this is known as negative reinforcement.

Target behavior should gradually grow better with the hope that the unpleasant item will go away.

A rat is placed in an environment where the floor gives the rat small electric shocks. The only way to get rid of the shocks is to press a lever in the corner of the box.

The rat quickly learns to press the lever. This is an example of  negative reinforcement

Hence the given condition is an example of negative reinforcement.

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Answer: The particles of a solid are [generally] closest together while those of a gas are farthest apart

Explanation:

The car can take this curve without skidding to the outside of the curve with a speed of 23.47 m/s.

Given that,

Radius of the track r = 44 m

Inclination θ = 16°

Mass of car m = 1563 kg

Coefficient of kinetic friction μ = 0.72

By analysing the free body diagram, we get,

N cos θ - fr - m g = 0  ----(1)

where, N is normal reaction

fr is friction

N cos θ + fr cos θ = mv²/r  ----(2)

fr = μ N ----(3)

From (1), (2) and (3) we get maximum velocity without skidding as,

v = √(g r ) × √( tanθ +μ )/(1 - μ tanθ) = √(9.8× 44 ) ×√( tan 16°+ 0.72)/(1 - 0.72 tan 16°) = 20.77 × √1.007/0.79 = 20.77 × 1.13 = 23.47 m/s

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The kinetic energy would be 96 J, for the car moving at 4m/s and with 3kg mass.

The kinetic energy (Ek) of the toy car is given by Ek = ½ mv2, where m is the mass of the car (3 kg) and v is the velocity (4 m/s). Thus, the kinetic energy of the car is 24 J. If the car were moving twice as fast (8 m/s), the kinetic energy would be 96 J. The units are Joules (J).

Kinetic energy is the energy of a body or system due to its motion. It is the energy that an object has due to its motion. Kinetic energy is equal to one half of the mass of the object multiplied by the square of its velocity.

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The ball will travel a horizontal distance is 79.7 ft before before it hits the ground.

What is horizontal distance?
An object to which we provide an initial velocity is called a projectile, and gravity has an impact on it. The length of the horizontal axis is a projectile's horizontal range. In addition, it would move before returning to the original vertical position. The horizontal range then depends on the launch angle θ, the acceleration brought on by gravity, and the beginning velocity V₀. Meters are the horizontal range's unit (m).

The ball will travel a horizontal distance of 105.6*cos(36.9) = 79.7 ft before it hits the ground.

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If an electron is passing through a field but no force is acting on it, it must be moving in a direction perpendicular to the direction of the field.

In the case of an electric field, the electron must be moving perpendicular to the field lines. This is because the force experienced by a charged particle in an electric field is proportional to the strength of the field and the charge of the particle, and acts in the direction of the field lines. If the electron is moving perpendicular to the field lines, there will be no force acting on it.

In the case of a magnetic field, the electron must be moving parallel to the field lines. This is because the force experienced by a charged particle in a magnetic field is proportional to the strength of the field, the charge of the particle, and the velocity of the particle, and acts perpendicular to both the field lines and the velocity of the particle. If the electron is moving parallel to the field lines, there will be no force acting on it.

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The full question is:
An electron is passing through a field but no force is acting on it. Under what conditions is it possible, if the motion of the electron be in the (i) electric field (ii) magnetic field?

One unusual aspect of asteroid Bennu compared to larger asteroids is its extremely rough and rocky surface. This is due to its small size (only about 500 meters in diameter), which means it doesn't have enough gravity to smooth out the boulders and rocks that make up its surface.

Additionally, Bennu has a very low density, which suggests that it is made up of porous materials rather than solid rock like larger asteroids. This unique composition makes Bennu an interesting target for scientific study and exploration.

Asteroid Bennu is unusual compared to larger asteroids primarily due to its relatively small size, rapid rotation, and its potential Earth impact hazard. While larger asteroids may have more stable rotation rates and less chance of Earth impact, Bennu's smaller size makes it more susceptible to the Yarkovsky effect, which alters its orbit due to the way it absorbs and re-emits sunlight as thermal radiation.

This effect, along with its rapid rotation, increases the probability of a future Earth impact, making it a point of interest for scientists and researchers.

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Answer:

all I know is C

are there more questions? anyone?

-KARL IS STOOPID

Explanation:

Answer:

Amorphous solids are composed of atoms or molecules that are in no particular order. Each particle is in a particular spot, but the particles are in no organized pattern. Examples include rubber and wax. Crystalline solids have a very orderly, three-dimensional arrangement of atoms or molecules

Explanation:

Answer:

The higher the amplitude, the higher the energy. To summarise, waves carry energy. The amount of energy they carry is related to their frequency and their amplitude. The higher the frequency, the more energy, and the higher the amplitude, the more energy.

To determine the reading on the pressure gauge, we can apply Bernoulli's equation for incompressible and frictionless flow. Bernoulli's equation states that the total mechanical energy per unit mass is conserved along a streamline. It can be written as:

P + 0.5ρv^2 + ρgh = constant,

where P is the pressure, ρ is the density of the fluid, v is the velocity of the fluid, g is the acceleration due to gravity, and h is the height above some reference point.

In this case, the fluid flows out of a nozzle and strikes a vertical plate. Since the plate is held in place with a horizontal force, the flow exerts an equal and opposite force on the plate. The force exerted by the fluid on the plate is given by the equation:

Force = Pressure × Area,

where the area is the surface area of the plate that the fluid strikes.

From the given information, we know that the force required to hold the plate in place is 12 N. By equating this force to the pressure multiplied by the plate area, we can solve for the pressure.

Pressure × Area = 12 N.

Therefore, the reading on the pressure gauge is 12 N divided by the area of the plate that the fluid strikes.

Regarding the second part of the question, there is no specific information provided about the power needed to satisfy the condition. Therefore, it is not possible to calculate the net power without additional information.

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Answer:

12

Explanation:

----------------............

From the analysis, it can be concluded that planet A has the strongest gravitational field, followed by planet C, and planets B and D have the same gravitational field strength.

The gravitational force acting on various masses is measured on different planets. The table shows the measured values for the forces acting on the corresponding masses:Planet Force (N) Mass (kg)A 8.0 0.50B 30 3.0C 45 3.0D 60 6.0

Method for comparing the gravitational field strengths on the different planets:First, we can use the formula for calculating gravitational force: \(`F = G (m_1m_2 / r^2)`\)where G is the universal gravitational constant `\(6.67 * 10^{-11 }Nm^2/kg^2\), m1 and m2 are the masses of the two objects in kg, and r is the distance between the centers of the objects in meters.

We know that the force is proportional to mass (F = ma). So we can calculate the acceleration due to gravity (g) on each planet by dividing the force by the mass. Therefore, we can use the formula: `g = F / m`.

Comparing the gravitational field strengths on the different planets:We will calculate the acceleration due to gravity (g) on each planet.

For planet A: `

g = F / m

= 8.0 N / 0.50 kg

= 16 \(m/s^2\)`

For planet B: `g = F / m

= 30 N / 3.0 kg

= 10 \(m/s^2\)

For planet C: `g = F / m

= 45 N / 3.0 kg

= 15 \(m/s^2\)

For planet D: `g = F / m

= 60 N / 6.0 kg

= 10 \(m/s^2\)

`So we see that planet A has the strongest gravitational field, followed by planet C, then planet B and planet D have the same gravitational field strength.

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Answer:

8.5 kg

Explanation:

F = ma

34 N = m(4.0m/s^2)

m = 8.5 kg

When discussing Newton's laws of motion, people most likely use the terms "action" and "reaction" when talking about Newton's third law of motion.

Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that whenever one object exerts a force on another object, the second object exerts an equal and opposite force back on the first object.

In other words, if object A pushes or pulls on object B with a certain force, then object B will push or pull back on object A with an equal and opposite force. This law applies to all types of forces, whether they are contact forces or non-contact forces, such as gravitational or electromagnetic forces.

This law is important in understanding how forces work in the physical world. It helps explain why things don't just keep accelerating indefinitely when a force is applied, and why forces always come in pairs. It also plays a crucial role in understanding the behavior of systems like rockets, airplanes, and cars.

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The change in temperature of the wire is 60.2°C.

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The RMS value of the magnetic field (B) will also be doubled when the RMS value of the electric field (E) is doubled. The factor by which the magnetic field changes is 2.

To provide a detailed explanation, when the RMS value of the electric field in an electromagnetic wave is doubled, the RMS value of the magnetic field also changes. The relationship between the electric and magnetic fields in an electromagnetic wave is governed by Maxwell's equations. These equations state that the electric and magnetic fields are perpendicular to each other and vary in intensity in a synchronized way.

In an electromagnetic wave, the intensity of the electric field and the magnetic field are related by a constant known as the impedance of free space. This constant determines the strength of the magnetic field for a given strength of the electric field. Therefore, if the RMS value of the electric field is doubled, the RMS value of the magnetic field will also double. This means that the strength of both fields increases proportionally.

To solve this mathematically, we first need to understand the relationship between the electric field (E) and the magnetic field (B) in an electromagnetic wave. This relationship is given by the formula:

E = c * B

where E is the RMS value of the electric field, B is the RMS value of the magnetic field, and c is the speed of light in a vacuum.

Now, if the RMS value of the electric field (E) is doubled, we have:
2E = c * B'

where B' is the new RMS value of the magnetic field. We can now express B' in terms of the original magnetic field B:
2E = c * B'
2(c * B) = c * B'
2B = B'

Hence, the RMS value of the magnetic field (B) will also be doubled when the RMS value of the electric field (E) is doubled. The factor by which the magnetic field changes is 2.

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The image is formed 6 cm in front of the concave mirror.Thus, option C is the correct answer.

Here, we can use the mirror formula:

1/f = 1/u + 1/v

where,

f = focal length

u = object distance from the mirror

v = image distance from the mirror

f = 18 cm  

u = -6 cm (object is placed 6.0 cm in front of the mirror)

Let's plug in the values,

1/f = 1/u + 1/v

1/18 = 1/-6 + 1/v

Multiplying the equation with -18v, we get,-v = -3 + v

So, the image is formed 6 cm in front of the mirror.Thus, option C is the correct answer.

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Answer:

A light-year is the distance light travels in one year. How far is that? Multiply the number of seconds in one year by the number of miles or kilometers that light travels in one second, and there you have it: one light-year. It's about 5.88 trillion miles (9.5 trillion km).

Explanation:

Answer:

Amiodarone

Explanation:

Answer:

disturbance,energy

Explanation:

Waves are a disturbance that transfer energy from one place to another.

;)

When a fragment of bone containing carbon-14 isotopes of the element carbon is discovered during an archaeological dig, and it is estimated to be approximately 23,000 years old, one can calculate the proportion of the carbon-14 isotopes that remains.

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Matching the quote about working in government to the correct branch will give us:

The second bubble describes the power of the executive branch

The third bubble describes the power of the judicial branch

The first bubble describes the power of the legislative branch

The power of the Executive Branch is vested in the President of the United States, who also acts as head of state and Commander-in-Chief of the armed forces.

The executive branch or is the part of government that enforces law, and has responsibility for the governance of a state.

In political systems based on the principle of separation of powers, authority is distributed among several branches (executive, legislative, judicial)—an attempt to prevent the concentration of power in the hands of a single group of people.

The executive enforces the law as written by the legislature and interpreted by the judiciary.

The executive can be the source of certain types of law, such as a decree or executive order. Executive bureaucracies are commonly the source of regulations.

The third branch of government is the Judicial branch. The Judiciary is made up of courts -- Supreme, Circuit, the magistrate (local) and municipal (city) courts. The Judicial branch interprets the laws.

The state judges are elected by the citizens rather than being appointed. They also run for their office as members of a political party.

The judiciary is the system of courts that interprets, defends, and applies the law in the name of the state. The judiciary can also be thought of as the mechanism for the resolution of disputes.

In many jurisdictions, the judicial branch has the power to change laws through the process of judicial review.

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The wavelength of the wave of speed 35 m/s is 1.75 m.

Wavelength is the distance taken by a wave to cover one complete cycle.

To calculate the wavelength of the wave, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the wavelength of the  wave is 1.75 m.

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1. The relationship between lightning and electricity was made clear by Franklin's experiment.2.  He submitted a plan for an experiment in which a lightning rod would be used to attempt to capture an electrical charge. 3,4. Some scientists and historians doubt this story because it's highly unlikely that lightning struck a key while Franklin was flying a kite because he would have most likely perished5. . Noone else try repeating this experiment

Do you think that Franklin actually performed this experiment?

The experiment was not carried out by Franklin to demonstrate the presence of electricity. Furthermore, it's highly unlikely that lightning struck a key while Franklin was flying a kite because he would have most likely perished.

He submitted a plan for an experiment in which a lightning rod would be used to attempt to capture an electrical charge in a "leyden jar," a container for storing electrical charges, proving that lightning was a type of electricity. Noone else try repeating this experiment.

Franklin established that lighting was an electrical discharge through the kite experiment and discovered that it could be charged into the ground over a conductor, offering a secure alternate route and reducing the possibility of fatal fires.

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Of the options listed, only the following statement is correct: Secondary batteries must be rechargeable.

Secondary batteries are rechargeable batteries that can be recharged and used multiple times. They are also known as storage batteries, rechargeable batteries or accumulators. They operate by converting chemical energy into electrical energy and vice versa. The chemical reactions in secondary batteries are reversible, allowing them to be recharged by applying a current to reverse the reaction.

Secondary batteries do not need to consist of exactly two species or metals, nor do they need to generate current spontaneously. They also do not necessarily need to contain a cathode and anode in separate cells, as some types of secondary batteries, such as lithium-ion batteries, use a single cell design.

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The power required to move the automobile to the top of the hill is 130,666.67 watts or 175.41 horsepower.

The power required to move an object can be calculated using the formula: power = work / time.

First, let's calculate the work done in lifting the automobile to the top of the hill. The work done against gravity is given by the formula: work = force × distance.

The force required to lift the automobile is equal to its weight. The weight of an object is given by the formula: weight = mass × acceleration due to gravity.

Substituting the given values, we have: weight = 2,000 kg × 9.8 m/s^2 (acceleration due to gravity) = 19,600 N.

The distance the automobile is lifted is 100 meters.

Therefore, the work done against gravity is: work = 19,600 N × 100 m = 1,960,000 J (joules).

The time taken to reach the top of the hill is given as 15.0 seconds.

Now, we can calculate the power using the formula: power = work / time.

power = 1,960,000 J / 15.0 s = 130,666.67 W (watts).

To convert watts to horsepower, divide the power in watts by 746 (1 horsepower = 746 watts).

power in horsepower = 130,666.67 W / 746 = 175.41 hp (horsepower).

Rounding to two decimal places, the power required to move the automobile to the top of the hill is approximately 130,666.67 watts or 175.41 horsepower.

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The  to problem of calculating the power required to move a 2,000-kilogram automobile to the top of a 100-meter hill in 15.0 seconds is given

Given, Mass of the automobile, m = 2000 knight of the hill, h = 100 time, t = 15.0 the gravitational potential energy of the automobile when at the bottom of the hill is equal to the work done in lifting it up the hill

.W = mgh= (2000 kg) (9.81 m/s²)

(100 m)= 1,962,000 J

Power is defined as the rate at which work is done, or the work per unit time. Therefore,

Power = Work / Time= 1,962,000 J / 15.0 s

= 130,800 WIn horsepower, Power = (130,800 W) / (746 W/hp)

= 175.3 hp

Therefore, the required power to move a 2,000-kilogram automobile to the top of a 100-meter hill in 15.0 seconds is 130,800 W or 175.3 hp.

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