Select the correct answer from each drop-down
Two magnets are placed as shown in the
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D
between the poles B and
. And the force of
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Answer:

B H2O.

Explanation:

Because H2O stands for hydrogen, which has the amount of 2. And O stands for oxygen, which is by itself. When you put that together it makes H2O.

Answer:

It is due to the effect of temperature on our taste receptors.

Explanation:

Answer:

Explanation:

According to ohm's law

The current flowing through the wire is directly proportional to the potential difference applied across its ends , provided the temperature and other physical conditions of the wire like stresses and strains remains constant .

Final answer:

The centripetal force on the sensor is 2544.06 N.

Explanation:

To calculate the centripetal force of on the sensor attached at the end of the wind turbine blade, we can use the formula:

F = m * r * ω²

Where F is the centripetal force, m is the mass of the sensor, r is the radius of the wind turbine blade, and ω is the angular velocity.

Substituting the given values, we have: F = 4.5 kg * 90.0 m * (2π rad/s).

After calculating, we get the centripetal force on the sensor to be 2544.06 N.

Answer:12.28m/s

Explanation:

momentum of baseball =mass of baseball x velocity of baseball

Momentum of baseball =0.31x21

Momentum of baseball =6.51kgm/s

For a softball to have same momentum with the baseball we can say :momentum of baseball =mass of softball x velocity of softball

6.51=0.53 x velocity of softball

Velocity of softball =6.51/0.53

Velocity of softball =12.28m/s

The velocity of the softball that must be equal to the momentum of the baseball is 12.28 m/s.

The given parameters;

Apply the principle of conservation of linear momentum to determine the velocity of the softball;

[tex]m_1u_1 = m_2 u_2\\\\u_1 = \frac{m_2 u_2}{m_1} \\\\u_1 = \frac{0.31 \times 21}{0.53} \\\\u_1 = 12.28 \ m/s[/tex]

Thus, the velocity of the softball that must be equal to the momentum of the baseball is 12.28 m/s.

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A. It spins the opposite direction of most planets

Explanation:

Answer:

(A) Mitosis

Explanation:

Answer:the child is moving at a constant velocity

Answer:

122.5 m

Explanation:

Given:

Time taken by apple to reach ground (t) = 5 s

Acceleration of the apple is due to gravity (g) = 9.8 m/s²

The displacement of the apple is equal to the height of window (h) = ?

As the apple is dropped, the initial velocity is, [tex]u=0\ m/s[/tex]

Now, using Newton's equation of motion along the vertical direction that relates displacement, initial velocity, acceleration and time taken, we have:

[tex]h=ut+\frac{1}{2}gt^2[/tex]

Plug in the given values and solve for 'h'. This gives,

[tex]h=0+\frac{1}{2}\times 9.8\times 5^2\\\\h=4.9\times 25=122.5\ m[/tex]

Therefore, the height of the window above the ground is 122.5 m.

The power required is 1.6 kW.

Answer:

Explanation:

Power is defined as the amount of work done on any object for a given time interval. In other words, power is the amount of force required to move an object in a given period of time.

Power = Work done / time taken for that work done.

Here the force is given as 800 N and the displacement is given as 2.5 m, while the time required for the displacement is given as 1.22 seconds.

So the power will be ratio of the  product of force acting on the weightlifter, displacement of the weight to the time taken for that displacement.

Power = (800×2.5)/1.22 =1639 W

So the power required is 1.6 kW.

Explanation:

the answer is true....maybe

Flexibility Leaders can able to adapt changes in circumstances and modify the way of approaching. Hence, the option A is correct.

Flexibility in leadership is the important quality for the leaders. It helps the leaders to adapt changes in their leadership style and serves the best for their team.

Flexible leaders can modify their style and way of approaching the situations. Those leaders can earn the trust of the people and encourage new ideas to increase productivity.

They can approach the situations in creative manner and incorporate new innovation and overcome the challenges.  Flexible leaders enhance the sustainable growth and profit.

Hence, Flexibility is a key characteristic for all leadership styles is True.

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Answer:

The law of conservation of energy applies to eating your favorite food in that the energy contained in the food is being converted to energy usable for the body system after the final digestion(Glucose or simple sugar, amino acid, etc)

Examples of transformation of energy include

(1) Transformation from Chemical energy in battery to light energy in bulb

(2) Transformation of Electrical energy to thermal/Heat energy in electric stove.

Explanation:

The law of conservation of energy states that energy can neither be created or distroy. It can only by converted from one form to another.

Final answer:

The Law of Conservation of Energy states that energy cannot be created or destroyed, but can be transformed. When eating your favorite meal, the chemical energy in the food is transformed into mechanical energy (chewing) and thermal energy (digestion).

Explanation:

The Law of Conservation of Energy states that energy cannot be created or destroyed, but it can be transformed from one form to another. This applies to eating your favorite meal because the food you eat contains chemical energy, which is then converted into other forms of energy as your body digests and metabolizes the food. Two examples of energy transformations in the process of eating your favorite meal are:

1. Chemical to Mechanical Energy: When you chew your food, the muscles in your jaw contract and expand, converting the chemical energy in the food into mechanical energy.

2. Chemical to Thermal Energy: As your body breaks down the food, chemical reactions take place, releasing heat energy in the form of thermal energy.

Answer: The Force exerted on the student by crate will be 100 N.

Explanation: As per the given Question student is trying to push the crate in right direction with the force of 100N.

And we know that, Newton's third law states that every action has equal and opposite reaction.

So from the Newton's 3rd law of motion it is very clear the student must be experiencing the same amount of force which he is applying.

Answer:

C

Explanation:

i dont know im just guessing im way too young for this stuff

the time over which a periodic wave repeats describes as a time period.

A wave with a recurrent pattern that controls its wavelength and frequency is called a periodic wave. The time it takes for a waveform to complete one cycle is referred to as a period, and the frequency is the number of cycles per second of time. It has amplitude, period, and frequency characteristics.

Frequency:

Frequency is the number of occurrences of a repeating event per unit of time.

Wavelength:

A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in consecutive cycles.

Amplitude (A):

The maximum displacement of a wave on either side of its mean position is called Amplitude.

Time Period (T):

The time taken to complete one vibration is called the Time period.

therefore, period describes the time over which a periodic wave repeats.

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Answer: Gravitational force

Explanation:

A non contact force can be described as a force applied to an object by another body that is not in direct contact with it.

For example, an object thrown upwards will return back due to the force of gravity acting on it. So, it means Gravitational force is acting on the body without necessarily being in contact with that body.

Answer:

volume

Explanation:

Another term for amplitude is height. The maximum displacement that a longitudinal wave, like the sound wave.

The greatest movement of any point existing just on string from its location when the string would be at rest is used to determine the amplitude of a transverse wave, like the wave on such a string that's also plucked there. The maximum displacement that a longitudinal wave, like the sound wave, may make from its equilibrium position is used to determine the wave's amplitude.

A sound is a type of energy that's also created when objects vibrate. In most cases, a medium is necessary for the propagation of sound. As a result, we may conclude that sound cannot travel in a vacuum because there is nothing for the sound waves to travel through. Another term for amplitude is height.

Therefore, another term for amplitude is height.

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Explanation:

a) Potential energy is weight times height.

PE = mgh

PE = (10.0 kg) (9.8 m/s²) (20.0 m)

PE = 1960 J

b) Energy is conserved.  As the block falls, potential energy is converted to kinetic energy.  Just before the block lands, all of the potential energy has been converted to kinetic energy.

KE = 1960 J

c) When the block has fallen half the distance, half the potential energy has been converted to kinetic energy.

KE = 1960 J / 2

KE = 980. J

d) Kinetic energy equals half the mass times the square of the velocity.

KE = ½ mv²

980. J = ½ (10.0 kg) v²

v = 14.0 m/s

Answer:

What are the choices?

Answer:

The big bang is a example of  scientific theory

Explanation:

The Big Bang is an example of a scientific theory about the origins and evolution of the universe. It has been substantiated through numerous tests and observations, specifically those related to the cosmic microwave background radiation and the expansion of the universe.

The 'Big Bang' is an example of a scientific theory. A scientific theory is an explanation for a range of phenomena that has been substantiated through repeated testing and observation. In this case, the Big Bang theory explains the origins and evolution of the universe. According to this theory, the universe originated from a singularity, a point of infinite density and temperature, about 13.8 billion years ago, and it has been expanding ever since. This theory is based on a wide range of observations, including those related to the cosmic microwave background radiation and the expansion of the universe.

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The velocity of the object is zero (the object is at rest)

Explanation:

A position vs time graph represents the motion of an object; in particular:

For a position-time graph, the slope of the graph is given by

[tex]m=\frac{\Delta x}{\Delta t}[/tex]

where

[tex]\Delta x[/tex] is the change in position

[tex]\Delta t[/tex] is the change in time

However, we see that this is equivalent to the definition of velocity:

[tex]v=\frac{\Delta x}{\Delta t}[/tex]

Therefore, the slope of  a position-time graph is equivalent to the velocity of the object.

And so, a horizontal segment on a position vs time graph means that the object has zero velocity (because the slope is zero).

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A 2-kg toy car accelerates from 5 to 10 m/s in 2 seconds. Find the applied force.

Force applied is [tex]5\frac {kgm} {s^2}[/tex].

Force is defined as something which changes or tends to change the velocity of a body. And acceleration is defined as the rate of change of velocity of a body per time. Both of them are vector quantities.

The initial velocity of the body = 5 m/s.

The final velocity of the body = 10 m/s.

So the change in velocity = 10 - 5 m/s = 5m/s.

Time period = 2 seconds.

So acceleration =[tex]\frac52 m/s^2[/tex]= [tex]2.5 m/s^2[/tex]

The force is defined as the product of mass and acceleration of the body.

Mass of body = 2 kg.

So, force applied =  [tex]2 \times 2.5 kgm/s^2[/tex]. =[tex]5kgm/s^2[/tex].

Answer:

carbon dioxide

Explanation:

Answer: small cars can stop and go fast big trucks can not

Explanation:

Answer:

The Milky Way is about 1,000,000,000,000,000,000 km (about 100,000 light years or about 30 kpc) across. The Sun does not lie near the center of our Galaxy. It lies about 8 kpc from the center on what is known as the Orion Arm of the Milky Way.

Mechanical waves are categorized into transverse, longitudinal, and surface waves. Transverse waves have disturbances perpendicular to wave direction, longitudinal waves have parallel disturbances, and surface waves are a combination of both.

Mechanical waves can be classified based on the type of motion involved in the wave's propagation. There are mainly two categories of mechanical waves, namely transverse waves and longitudinal waves. However, there is also a third category known as surface waves, which is a combination of both transverse and longitudinal motions.

Transverse waves are characterized by a disturbance that moves perpendicular to the direction of wave propagation. An example of a transverse wave is a wave on a string or an electromagnetic wave, such as visible light. Whereas, longitudinal waves have disturbances that move parallel to the direction of propagation, like sound waves in air or water.

Surface waves are typically observed in fluids, like water waves in the ocean, where the motion of the particles at the surface follows a circular path, thus involving both longitudinal and transverse motions.

Therefore, when considering the types of mechanical waves, the answer would be all of the above as it includes transverse waves, longitudinal waves, and surface waves.

a) The work done by the gravitational force on the flat surface is zero

b) The work done by the gravitational force on the ramp is -634 J

c) The work done by the applied force on the flat surface is 500 J

d) The work done by the applied force on up along the ramp is 500 J

Explanation:

a)

The work done by a force is given by the equation

[tex]W=Fdcos \theta[/tex]

where

F is the magnitude of the force

d is the dispalcement of the object

[tex]\theta[/tex] is the angle between the direction of the force and of the displacement

In this problem, we want to calculate the work done by the gravitational force as the box is pushed across the flat ground.

We immediately notice that the gravitational force acts downward, while the displacement is horizontal: therefore, the angle between force and displacement is [tex]90^{\circ}[/tex]; this means that [tex]cos 90^{\circ}=0[/tex], and therefore, the work done is zero:

[tex]W=0[/tex]

b)

In this case, the box is pushed along the ramp. We have:

[tex]F=mg=(50.0)(9.8)=490 N[/tex] is the magnitude of the force of gravity, where

m = 50.0 kg is the mass of the box

[tex]g=9.8 m/s^2[/tex] is the acceleration of gravity

d = 5.00 m is the displacement of the box along the ramp

The ramp is inclined to the horizontal by [tex]15.0^{\circ}[/tex], therefore the angle between the force of gravity and the displacement of the box (moving up along the ramp) is:

[tex]\theta=90^{\circ}+15^{\circ}=105^{\circ}[/tex]

Therefore, the work done by gravity in this case is:

[tex]W=(490)(5.00)(cos 105^{\circ})=-634 J[/tex]

c)

In this case, we want to calculate the work done by the force you apply as the box is pushed across the flat ground.

Here we have:

F = 100.0 N (force applied)

d = 5.00 m (displacement of the box)

[tex]\theta=0^{\circ}[/tex] (the force is applied parallel to the flat surface, therefore force and displacement have same direction)

Therefore, the work done by the force you apply on the flat ground is:

[tex]W=(100.0)(5.00)(cos 0^{\circ})=500 J[/tex]

d)

In this last case, we want to calculate the work done by the force you apply as the box is pushed up along the ramp.

This time we have:

F = 100.0 N (force applied is the same)

d = 5.00 m (displacement of the box is also the same)

[tex]\theta=0^{\circ}[/tex] (the force is applied parallel to the ramp, therefore force and displacement have again same direction)

Therefore, the work done by the force you apply while pushing the box along the ramp is:

[tex]W=(100.0)(5.00)(cos 0^{\circ})=500 J[/tex]

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Answer:

it false, APEX, i just did this one

Explanation:

Answer:

False

Explanation:

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another.

Answer:

12 m

Explanation:

Work = change in energy

W = ΔE

Fd = ΔE

(4.0 N) d = 61 J

d = 15.25 m

Rounded to two significant figures, the distance the force would have to act over is 15 m, which is 12 m more than the 3.0 m it traveled.

Final answer:

To calculate the additional distance needed for the block to have 61 J of kinetic energy, we used the work-energy theorem and found that after applying a force of 4 N over 3 m, the kinetic energy is 12 J. An additional 49 J is needed, resulting in a requirement of an additional 12.25 m for the force to act upon.

Explanation:

To determine how much farther the force would have to act for the block to have 61 J of kinetic energy, we'll first use the work-energy theorem, which states that the work done on an object is equal to the change in its kinetic energy (KE). Initially, the block has 0 J of kinetic energy since it's at rest, and the work done by a constant force is W = F * d, where F is the force and d is the distance the force is applied over.

Since 4 N of force is applied over 3 m, the work done is:

W = 4 N * 3 m = 12 J

This means the kinetic energy of the block is now 12 J after the force has been applied for 3 m. To reach 61 J of kinetic energy, the block needs an additional:

KEneeded = 61 J - 12 J = 49 J

Now, we can find the additional distance (dadditional) required using the same work done equation:

49 J = 4 N * dadditional

dadditional = 49 J / 4 N = 12.25 m

Therefore, the force would have to act over an additional 12.25 m to give the block 61 J of kinetic energy.

Answer:

It needs attractive force from the strong nuclear interaction to counter the electrostatic repulsion between the protons.

Explanation:

It has to counter

Final answer:

Other elements apart from hydrogen need at least one neutron in their nuclei to stabilize the electrostatic repulsion between protons. Neutrons add to the atomic mass and contribute to the stability of atoms. The varying number of neutrons leads to different isotopes of an element which is an essential factor in the structure and behavior of elements.

Explanation:

Neutrons play a key role in the stability of an atom. While hydrogen, with an atomic number of 1, can exist without neutrons in its nucleus, other elements require neutrons to offset the electrostatic repulsion between protons, which are all positively charged. The presence of neutrons in the nucleus contributes to the atomic mass and helps to maintain the stability of atoms as it keeps the protons from repelling each other and breaking the nucleus apart.

Isotopes are versions of the same element with a different number of neutrons, leading to variations in their atomic mass. For example, helium has an atomic number of 2 and an atomic mass of 4 because it has two neutrons in addition to two protons. As we move across the periodic table, the ratio of neutrons to protons in the nucleus generally increases, aiding in the stability of heavier elements.

The atomic mass of an element is not simply its atomic number (the number of protons) but the combination of the number of protons and neutrons. Protons and neutrons have nearly identical masses, and each contributes significantly to the mass of an atom. This concept is integral when considering the structure and behavior of elements and in understanding the composition of the human body, which is largely made up of elements like oxygen, carbon, and hydrogen.

Answer: D!

It is the option with the greatest amplitude.

Answer: The graph with the highest density of air.

Explanation: The graphs are missing, but il try to explain this problem anyways.

Soundwaves are mechanical waves, that need a medium to move (commonly, the medium is the air)

As those mechanical waves affect the air, the density of air in some areas increase and in others decrease, and when that "wave of air" impacts a receptor, like your ear, you receive the information of the sound, like pitch and intensity.

As more air impacts the receptor, more "loud" is the noise, and as you may know, density = mass/volume, so as biggest is the density of air in a point, this means that we have more mass of air at that point, which is directly related to the intensity or loudness of the sound wave at that point