5. Which best describes electromagnetism?
A. the electrical component of a magnet
B. the flow of electricity between two magnets
C. the interaction between electricity and magnetism
D. the flow of a magnetic field between two electrons

Here is your Answer:-

Conduction is how heat transfers through direct contact with objects that are touching. Any time that two objects or substances touch, the hotter object passes heat to the cooler object. (That hot sand passed the heat energy right into my poor feet)!

Answer:

Conduction is the transfer of thermal energy from one object to another through the movement of molecules. Heat flows from one molecule to another because the particles are in direct contact with one another.

Answer:

As we navigate down a group the atoms get bigger and bigger with more and more electrons. This means the outermost electrons get further and further away from the positively charged nucleus.

Answer:

As we navigate down a group the atoms get bigger and bigger with more and more electrons. This means the outermost electrons get further and further away from the positively charged nucleus

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The image here is not found here but star formation is characterized by clouds of dust where stars are born.

Star formation is a physical phenomenon where molecular clouds in space need to collapse to generate stars.

Stellar evolution is a process that initiates when a star is formed and ends when it dies (formation of a red giant).

Stars can be generated inside clouds of dust which are dispersed in different types of galaxies in the universe.

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The moment of inertia, I, of an object is a measure of its resistance to rotational motion. It depends on both the mass distribution of the object and the axis of rotation. The moment of inertia about an axis passing through the center of mass, I_cm, can be calculated using the parallel axis theorem.

If we have an object with mass, m, and a radius, r, we can express the moment of inertia about the center of mass, I_cm, as:

I_cm = I_com + md^2

where I_com is the moment of inertia about an axis passing through the center of mass and parallel to the original axis, and d is the distance between the original axis and the center of mass.

For a simple object like a uniform rod or disk, the moment of inertia about the center of mass can be calculated using known formulas. For example, for a uniform rod rotating about an axis perpendicular to its length and passing through its center of mass, the moment of inertia is:

I_com = (1/12) * m * L^2

where L is the length of the rod.

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Answer:

An aeroplane is flying with the velocity of V_(1)=800kmph relative to the air towards south.A wind with velocity of V_(2)=15ms^(-1) is blowing from west to east.What is the velocity of the aeroplane with respect of the earth.

Answer:

Beginners should concentrate on muscular endurance because after all, it is endurance. It will allow the person to know where their strength stands at and what they should do to improve it. It will also increase your abilities in different fields, allowing for stronger and healthier muscles.

Answer:

S = V0 t + 1/2 a t^2

a = (V2 - V1) / t = (80 - 20) km/hr / .067 hr = 900 km/hr^2

S = 20 km/hr * 067 hr + 1/2 * 900 * .067^2 km = 3.34 km

Les molécules sont arrangées autrement, ce qui modifie l'aspect ou l'état de l'espèce chimique. Un mélange est une substance composée de plusieurs espèces chimiques qui ne réagissent pas ensemble, au contraire de la transformation chimique. Il s'agit donc d'une transformation physique, qui ne change pas la matière.

Alpha particle - a type of radioactive emission consisting of two protons and two neutrons, with a 2+ charge, and is equivalent to a helium nucleus. It has low penetrating power and is easily stopped by a sheet of paper or the outer layer of skin.

Beta particle - a type of radioactive emission consisting of an electron or a positron, emitted from the nucleus of an atom undergoing radioactive decay. Beta particles have a charge of -1 or +1, and are more penetrating than alpha particles but less than gamma rays.

Gamma ray - a type of electromagnetic radiation emitted by the nucleus of an atom undergoing radioactive decay. Gamma rays have no charge and no mass, and are highly penetrating, requiring several inches of lead or several feet of concrete to shield from them.

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The energy of the high energy neutron is 940.51 MeV.

Speed is nothing but the distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity with the SI unit meter/second.

We know that mass of the neutron m₀ = 939.6 MeV/c²

A high energy neutron is travelling at a speed of 18 million m/s.

Given that, v = 1.8 * 10⁷ m/s

The energy of neutron is calculated with the formula, m₀* c²/√(1 - v²/c²)

⇒ 939.6 * (3* 10⁸)²/√[1 - (1.8 * 10⁷)²/(3* 10⁸)²]

⇒ 940.51 MeV

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To find the average velocity on a velocity-time graph, you need to calculate the slope of the line connecting two points on the graph. The average velocity represents the change in velocity divided by the change in time between those two points.

To calculate the average velocity, you can use the formula:

Average velocity = (change in velocity) / (change in time)

You can determine the change in velocity by finding the difference between the final velocity and the initial velocity. The change in time is the difference in the time coordinates of the two points.

Select two points on the velocity-time graph, typically denoted by (t₁, v₁) and (t₂, v₂), where t represents time and v represents velocity. Then, substitute the values into the formula mentioned above to calculate the average velocity.

It's important to note that the average velocity provides information about the overall change in velocity over a specific time interval, rather than instantaneous velocity at a particular moment.

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Ripping objects generally involves the action of flexion of the fingers.

When we grip an object, our fingers bend inwards towards the palm, which is flexion. This action allows us to grasp and hold onto objects securely. When we rip objects, we typically apply a pulling force with our fingers, which requires a strong grip and a quick flexion of the fingers to tear the object apart.

Extension: This is the opposite of flexion, where the fingers are straightened and extended away from the palm.

Adduction: This refers to the movement of the fingers towards the center of the hand or towards the middle finger.

Abduction: This refers to the movement of the fingers away from the center of the hand or away from the middle finger.

While these finger actions are all important in performing different tasks, ripping objects specifically involves the action of flexion as it requires a strong grip and quick bending motion to tear the object apart.

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Answer:

1500 kg is mass of car

Explanation:

F = ma

F/a = m

4500n / 3 m/s^2 = 1500 kg

Answer:

1911 J

Explanation:

P.E = mgh

P.E= (65)(9.8)(3)

Answer:

First tell what are the directions and what we've to do?? add subtract or multiply??

Answer:

Energy stored in an object due to its position is Potential Energy. · Energy that a moving object has due to its motion is Kinetic Energy.

Explanation:

Answer:

To summarize, potential energy is the energy that is stored in an object due to its position relative to some zero position.

Holding a bow and arrow before shooting, The amount of energy stored before you race on track, And a roller coaster going to it's highest point staying there waiting to come down.

The second law of thermodynamics states that the total entropy of a closed system always increases over time, unless work is done to reverse the process. The third law of thermodynamics states that it is impossible to reach absolute zero temperature through a finite number of finite-volume processes

1) Examples of heat and work in thermodynamics:

- Heat is energy transferred between two systems due to a temperature difference. Examples of heat include the absorption of sunlight by plants, the heat released during combustion, and the heat transfer from a hot stove to a pot of water.

- Work is the energy transferred to or from a system due to a force acting on it through a distance. Examples of work include the work done by an engine to move a car, the work done by an electric motor to spin a fan, and the work done by a weight lifter to lift a barbell.

2) Examples of heat in thermodynamics:

- The heat released during a chemical reaction, such as combustion or respiration

- The heat absorbed or released during phase transitions, such as melting or evaporation

- The heat transfer in a heat exchanger, such as in a refrigerator or air conditioning unit

- The heat transfer between a hot object and a cooler object, such as in cooking or heating a room.

3) Examples of work in thermodynamics:

- The work done by a piston pushing a gas in an engine

- The work done by a pump moving liquid from one place to another

- The work done by an electric motor turning a shaft to spin a machine

- The work done by a crane lifting a heavy object.

4) James Prescott Joule was a British physicist and brewer who lived from 1818 to 1889. He is known for his work in the field of thermodynamics, and for developing the concept of mechanical equivalent of heat. He discovered the relationship between heat and mechanical work, which is now known as Joule's first law. He also made important contributions to the study of the kinetic theory of gases and the nature of energy itself.

5) The formulas for the first, second, and third laws of thermodynamics are:

- First law: ΔU = Q - W, where ΔU is the change in internal energy of the system, Q is the heat added to the system, and W is the work done on the system.

- Second law: ΔS ≥ Q/T, where ΔS is the change in entropy of the system, Q is the heat added to the system, and T is the temperature of the system.

- Third law: As temperature approaches absolute zero, the entropy of a perfect crystalline substance approaches zero.

6) The second law of thermodynamics states that the total entropy of a closed system always increases over time, unless work is done to reverse the process. The third law of thermodynamics states that it is impossible to reach absolute zero temperature through a finite number of finite-volume processes, and thus there is always a minimum residual entropy in the system.

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Part 1: The number of pathways in a circuit determines the possible routes for electric current to flow.

There are maximum of five pathways in this circuit, depending on its complexity and the arrangement of components.

Part 2: Determining whether the circuit is series or parallel requires more information.

In a series circuit, components are connected in a single path, and the current flows through each component sequentially.

If the circuit has only one pathway (zero or one pathway), it suggests a series circuit.

However, if the circuit has multiple pathways (two or more pathways), it indicates a parallel circuit.

To conclusively determine the circuit's nature, we need to analyze the circuit diagram or obtain additional details regarding the component connections and their interactions.

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The statement indicating that 'Gravitation always does negative work' is FALSE.

Gravitation is a fundamental physical force that makes objects attract each other in the Universe.

This force (Gravitation) is required to maintain both constant positions and movement of objects.

In conclusion, the statement indicating that 'Gravitation always does negative work' is FALSE.

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Answer:false

Explanation:

The pressure is too low for hydrogen to be metallic.

Hydrogen exists in a phase known as metallic hydrogen, where it exhibits electrical conductivity. Eugene Wigner and Hillard Bell Huntington made a theoretical prediction about this phase in 1935.

The layer on Saturn is smaller than that of Jupiter because Saturn does not produce the pressure required for metallic hydrogen in as much of its volume as Jupiter does, whereas Uranus and Neptune are too small to generate the pressures required for this layer.

Because they are smaller than Jupiter and Saturn, neither has the deep metallic hydrogen mantles that can be found on those planets. Uranus and Neptune are frequently referred to as Ice Giants to distinguish them from the Gas Giants, Jupiter and Saturn, because they are mostly composed of ices and lack deep hydrogen mantles.

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a) When she is stationary, the distance does not increase/decrease.

-> The line is flat.

We see that the period where the line is flat is 7.5 minutes.

b) The total distance travelled is the distance she travelled away + back from/to home.

-> 25 x 2 = 50km

c) Average speed = Total distance/total time.

-> 20/0.5 = 40(km/h)

They do not transmit sufficient energy to kill cancer cells.  Longer wavelengths than visible light define infrared waves (IR), a kind of electromagnetic radiation.

The electromagnetic radiation known as infrared, also referred to as infrared light, has wavelengths that are longer than those of visible light and shorter than those of radio waves. Wavelength range and sources: between 780 nm and 1 mm. Infrared radiation (IR), commonly referred to as heat radiation, is that region of the electromagnetic spectrum with wavelengths above red visible light, between 780 nm and 1 mm. IR can be divided into three groups: IR-A (780 nm-1.4 m), IR-B (1.4-3 m), and IR-C, commonly known as far-IR (3 m-1 mm).

IR wavelengths range from 700 nanometers (frequency 430 THz), which corresponds to the visible spectrum's notional red edge, to 1 millimeter (300 GHz). Long-term IR exposure, according to medical studies, can harm the lens, cornea, and retina, causing cataracts, corneal ulcers, and retinal burns, respectively. Workers can use gear with IR filters or reflective coating to help prevent long-term IR exposure. Electrical warmers, food-cooking appliances, remote controls, optical fibres, security systems, and thermal imaging cameras that can see individuals in the dark all employ infrared (IR) light. whereas, gamma rays, which have the highest energy (and thus the most penetrating), for instance, have higher frequencies than infrared waves.Gamma rays are the electromagnetic waves with the highest energy, highest frequency (300 EHz), and shortest wavelengths (1 pm) (1,24 MeV) and are used in treating cancer.

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The FIIT plan required for different type of workout is shown in the image attached.

FIIT plan is used to monitor one's workout routine. It also helps to create workout routines that helps one's fitness goal which might differ from each person. It works based on four elements i.e., Frequency, Intensity, Time and Type.

Frequency refers to how often a workout needs to be done. Intensity refers to how hard a workout must be done. Time refers to the amount of time spent on the workout. Type refers to the king of exercise which suits one's final goal.

Therefore, the FIIT plan required for different type of workout is shown in the image attached.

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The value of the resistor is 24Ω.

A resistor is a passive two-terminal electrical component used in circuits to implement electrical resistance. Resistors have a variety of purposes in electronic circuits, including lowering current flow, adjusting signal levels, dividing voltages, biassing active components, and terminating transmission lines.

We are given that,

Voltage = δv =8v

Current = i =6a

So that , the resistance can be calculated by the formula by,

R = Vi

R = 8v × 6a

R = 24 Ω

Therefore , the of resistor would be 24Ω.

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Answer:

9.79

Explanation:

to lazy to explain just go do your homework

The force of friction on the sled is  12.39 N.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Frictional force allows the ball to stay in the hand while muscular force is employed to stop the motion of the ball during catching. Throughout this activity, the Earth's gravitational pull on the ball is constant.

Frictional force = μmg

Frictional force = (.110)(11.5)(9.8)

Frictional force = 12.39

The force of friction on the sled is  12.39 N.

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The uncertainty in your mass is 87.9 ± 0.7 kg.

It is one of the fundamental quantities in Physics and the most basic property of matter. We can define mass as the measure of the amount of matter in a body. The SI unit of mass is Kilogram (kg).

Note: The mass of a body does not change at any time. Only for certain extreme cases when a huge amount of energy is given or taken from a body. For example: in a nuclear reaction, tiny amount of matter is converted into a huge amount of energy, this reduces the mass of the substance.

The uncertainty in your mass (in kilograms) can be calculated as the uncertainty in the bathroom scale reading. The uncertainty in the bathroom scale reading is given as 0.7 kg. Therefore, the uncertainty in your mass is also 0.7 kg.

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Answer:

Explanation: C is the correct one

because A) the current divides into parts for each branch

B)the current doesn't varry in series

D) in parallel the current divides and passes in all branches