What part of a motor causes its electromagnet to turn in the same direction
consistently, transforming electrical energy into mechanical energy?
A. Commutator
B. Loop of wire
C. Permanent magnets
D. Battery


PLS HELP

Answer:

Evaluate the solution.

Explanation:

A technological design is designed as the design and study of a solution that can be provided from the solution by identifying the root cause or problem and trying to solve by various means.

A good technological design requires the minimum effort and resources while meeting the requirement of the problem.

The steps involved in the technological design are :

1. search and identify the problem or need.

2. design a solution

3. Implement a solution.

4. Evaluate the solution.

Therefore, the final step or the fourth step in the process of a technological design is " evaluating or communicating the final design solution".

Answer:

160,934.4 cm or in other words *160,934*

Explanation:

1 mile = 5280 ft.

5280 ft. = 63360 in.

63360 in. = 160934.4

Answer: When an object is moving, the friction is proportional and perpendicular to the normal force (N)

Friction is independent of the area of contact so long as there is an area of contact.

The coefficient of static friction is slightly greater than the coefficient of kinetic friction.

Within rather large limits, kinetic friction is independent of velocity.

Friction depends upon the nature of the surfaces in contact.

It is false that peripheral vision is what you see when you turn your head to the left or right.

The statement is false. Peripheral vision is the ability to see objects and movement outside of the direct line of vision, without having to turn the head or move the eyes. It is part of our vision that extends beyond the center of our gaze and is crucial for detecting motion and objects in our surroundings. When we turn our head to the left or right, we are actually using our central vision to focus on objects in our new line of sight, not our peripheral vision. Our central vision is responsible for providing detail and color vision, while our peripheral vision is more sensitive to movement and changes in light and dark. So, when we turn our head, we are using both our central and peripheral vision to perceive our surroundings.

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Answer:

sun is the main source while the other object reflect light on the sun

Explanation:

nasa libro yans

Answer:

See below

Explanation:

Things generally expand when heated ....so volume increases while mass remains the same .....this will cause the value of density to decrease  

Answer: 1 degree

Explanation:  I looked it up.

Answer:

I'm soooooooo happy you asked the answer is yes

Radii is a vital feature of the elements, and it can be useful in determining the characteristics of elements in various chemical and physical processes. The radii of atoms and ions of the same element differ due to their various charge and mass characteristics.

Atomic and ionic radii increase as you move down a group on the periodic table, and decrease as you move across a period from left to right due to increased nuclear charge, making the electrons closer to the nucleus. The size of an atom and ion also changes due to the number of electrons charge, and electronic configuration.In order of increasing radius, the arrangement of \(Ne, F-, O2-, Br-, Rb\) is given as follows:

\(Ne < F- < O2- < Br- < Rb+\)

Rb+ has the smallest radius due to its large nuclear charge and fewer electrons in the valence shell.

As a result, they are larger than Rb+. O2- has more electrons than Ne and is the largest among the given ions and atoms. It is important to note that in certain conditions, the trends in radii may not be valid because of hybridization and other factors. Nonetheless, this arrangement is valid for the given ions and atoms.

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Answer:

False

Explanation:

The formula of force that exists between two charges is expressed as;

F = kq1q2/r²

If two charges separated by one meter exert a 9 N force on each other, the;

9 = kq1q2/1²

9 = kq1q2 ..... 1

If the charges are pushed to a 3 meter separation, then;

F =  kq1q2/3²

F =  kq1q2/9 .... 2

Divide both equations;

9/F = (kq1q2)/ kq1q2/9

9/F =  kq1q2 * 9/ kq1q2

9/F = 9

F = 9/9

F = 1N

Hence if the charges are pushed to a 3 meter separation, then the force on EACH charge will be 1N. Hence the answer is False

The correct answer about density is 2.91 g/mL.

Density = Mass / Volume

Density = 58.2 g / 20 mL

Density = 2.91 g/mL

Thus, we can conclude that by dividing mass of the object by volume of the object, we will find the density of the object.

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Answer:

the amount of the force i learned it from my teacher

The amount of force is referred to as the magnitude of a force. Hence, option B is correct.

A force is an action that has the ability to alter an object's motion. An object can be caused by a force, which can also accelerate an item. To describe force, a push or a pull, makes intuitive sense. Forces have had both direction and magnitude, since they are vector quantities. It is measured in newtons that use the SI system (N). The symbol for force is the letter F.

An entity's net force equals the rate at which its momentum is changing over time, according to the original formulation of Newton's second law.

Objects' velocities can be changed by the concepts of push, drag, and torque. Thrust causes an item to move faster, whereas torque allows an object to move slower. Each part of an extended body typically exerts forces on its adjacent sections; the internal mechanical stress in the body is the result of the distribution of these forces.

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Ultrasonic transducers are used to produce and receive ultrasonic waves. The principles behind the functioning of ultrasonic sensors are that they use the ultrasonic waves that are produced by the sensor to detect any obstacles or measures any distance in the environment.

The working principle can be explained as follows:

Working principles of ultrasonic transducers:

When an alternating current is applied to a piezoelectric crystal, it undergoes a physical deformation or produces a mechanical vibration.
The crystal deforms or vibrates at the same frequency as the applied electrical signal. This phenomenon is known as the piezoelectric effect.

Calculation of the transmission speed of sound through air at 0°C, 20°C, 30°C, and 100°C:

The transmission speed of sound through air is dependent on the temperature of the air. The formula for the calculation of the transmission speed of sound is given as:

V = 331.4 + 0.6T

Where V is the speed of sound in m/s

T is the temperature of the air in Celsius.

The calculated values are as follows:

At 0°C, V = 331.4 + 0.6(0) = 331.4 m/s

At 20°C, V = 331.4 + 0.6(20) = 343.4 m/s

At 30°C,V = 331.4 + 0.6(30) = 347.4 m/s

At 100°C, V = 331.4 + 0.6(100) = 393.4 m/s

The transmission speed of sound through air at 0°C, 20°C, 30°C, and 100°C is 331.4 m/s, 343.4 m/s, 347.4 m/s, and 393.4 m/s, respectively.

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Answer:

Explanation:

A. The bird flew real far and fast.

"far" and "fast" describe the type of motion.

Answer: C, supplements and drugs both undergo stringent government testing.

Explanation: took the unit test.

hope this helps :)

Answer:

C

Explanation:

Answer: GPE = MGH

Explanation:

M = Mass

G = Gravitational acceleration(9.8m/s^2 on Earth)

H = Height

Answer:

GPE=mgh

Explanation:

m - mass

g - gravitational force

h - height

One of the best ways to protect yourself from excessive exposure to radiation is to avoid unnecessary exposure. If possible, avoid getting X-rays or other types of radiation when they are not medically necessary. However, if you do need to get an X-ray, make sure it is done by a licensed professional who will take the necessary precautions to limit your exposure.

Radiation can be harmful to the human body, and exposure to excessive radiation can lead to serious health problems such as cancer and radiation sickness. Therefore, it is essential to protect yourself from excessive exposure to radiation.

Finally, increasing your distance from the source of radiation can also help protect you from excessive exposure. The further away you are from the source of radiation, the less exposure you will receive. Therefore, if you work in an environment where you are exposed to radiation, try to keep as much distance between yourself and the source as possible.

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By contrasting a substance's melting point with the melting points of other known chemicals, melting point determination can be used to identify a substance.

The temperature at which a substance transitions from a solid to a liquid form is known as the melting point of that substance. A pure substance has a sharp melting point and melts at a specific temperature, whereas an impure substance has a lower melting point and melts over a wider temperature range.

Precautions to be taken while using a melting point apparatus are -

1. To find the melting point of a sample, use a dry, powdered sample.

2. Maintain a level distance between the thermometer and the lower end of the capillary tube.

3. There shouldn't be any significant air spaces between the solid particles and the powder during packing.

4. To keep a constant temperature, the bath should be gradually heated and stirred often.

5. Neither the bottom of the beaker nor the sides of the thermometer's bulb or the capillary attached to it should contact.

6. When connecting the capillary tube to the thermometer, avoid using rubber bands.

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False. The statement that the resistances measured in the experiment are very small and less than 1 Ω cannot be determined solely based on the information provided.

The values of resistance in an experiment can vary widely depending on the specific setup and components used.

Resistances can range from very small values (less than 1 Ω) to extremely large values, depending on the context and purpose of the experiment. Additional information about the specific experiment and its components would be needed to make a definitive statement about the resistances being measured.

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Kepler was the first astronomer to look at the planet’s orbital paths. He discovered that these had a/an elliptical shape.

The heliocentric model is actually just a model for the solar system, not our entire universe.

Answer:

The amount of gravitational potential energy an object has depends on its height and mass. The heavier the object and the higher it is above the ground, the more gravitational potential energy it holds. Gravitational potential energy increases as weight and height increases. 

Answer:

A rock and a drilled nail

Explanation:

Both objects are not moving potential energy means no movement no energy and both objects never move

A hurricane is a big rotating storm system that forms over warm ocean waters and often moves toward the western coast of the United States.

A tropical storm is a hurricane in the northern Pacific Ocean or the Atlantic Ocean.

A hurricane is a big rotating storm system that forms over warm ocean waters and often moves toward the western coast of the United States. Hurricanes are either classified as tropical storms or hurricanes, depending on the greatest sustained wind speeds. Tropical storms have winds between 39 and 73 mph, whereas hurricanes have winds of 74 mph or greater.

When a hurricane makes landfall, storm surges, powerful winds, and copious amounts of rain can cause flooding. Storm surge refers to the rise in sea level that occurs as a cyclone approaches shore.

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The expression for the pressure of a system of independent bosons and independent fermions is given below

\(KT NkTP=t Σn[1±exp(β(μ-ε,)]Vs=1\)

Where t is the sum over all states, and the plus sign and minus sign in the brackets correspond to bosons and fermions, respectively. The negative sign of kT implies that energy tends to decrease as the temperature rises. The summation is bounded, and the square brackets are non-negative, with the upper bound being 1 for bosons and 0 for fermions. Since there are N particles in total, the first term in the bracket is multiplied by N to obtain the total number of particles. Then, the sum is rearranged and simplified as follows:For bosons:

\(KT NkTP=t Σn[1-exp(-β(ε_n-μ))]Vs\\=1KT NkT|P|≤Nexp(βμ) Σn exp(-βε_n)V\)

For fermions:\(KT NkTP=t Σn[1-exp(-β(ε_n-μ))]Vs=1KT NkT|P|≤Nexp(βμ) Σn exp(-βε_n)V\)In each case, the sum is bounded and non-negative. As a result, both the expressions have a non-negative value. This implies that pressure is always positive or zero.Since the number of particles is constant, the second term is the chemical potential multiplied by the total number of particles. For bosons, chemical potential is always less than zero, whereas for fermions, chemical potential is always greater than zero. This implies that the bosonic pressure is greater than the fermionic pressure if the number of particles is constant. Hence, P_(B) > P_(F). From the great partition function, the expression for pressure of a system of independent bosons and fermions is given as,

\(KT NkTP=t Σn[1±exp(β(μ-ε,)]Vs=1\)

where t is the sum over all states, and the plus sign and minus sign in the brackets correspond to bosons and fermions, respectively. The negative sign of kT implies that energy tends to decrease as the temperature rises. The summation is bounded, and the square brackets are non-negative, with the upper bound being 1 for bosons and 0 for fermions. Since there are N particles in total, the first term in the bracket is multiplied by N to obtain the total number of particles. The expressions can be written as:

For bosons\(:KT NkTP=t Σn[1-exp(-β(ε_n-μ))]Vs=1KT NkT|P|≤Nexp(βμ) Σn exp(-βε_n)V\)For fermions:\(KT NkTP=t Σn[1+exp(-β(ε_n-μ))]Vs=1KT NkT|P|≤Nexp(βμ) Σn exp(-βε_n)V\)In each case, the sum is bounded and non-negative. This implies that pressure is always positive or zero. Since the number of particles is constant, the second term is the chemical potential multiplied by the total number of particles. For bosons, chemical potential is always less than zero, whereas for fermions, chemical potential is always greater than zero. Hence, P_(B) > P_(F)

Thus, we can conclude that for a system of N independent bosons and one of independent fermions, the pressure is given by \(KT NkTP=t Σn[1±exp(β(μ-ε,)]Vs=1\)where the plus sign and minus sign in the brackets correspond to bosons and fermions, respectively. The summation is bounded and non-negative. This implies that pressure is always positive or zero. The bosonic pressure is greater than the fermionic pressure if the number of particles is constant.

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Answer:

a piece of equipment with moving parts that does work when it is given power from electricity, gasoline, etc.

Explanation:

Have A Wonderful Day !!

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 69 × 2

We have the final answer as

Hope this helps you

Answer: inertia

Explanation:

he glass of water has inertia — it will not move unless a big enough force acts on it. The force in this activity pulling on the glass of water is the friction between the tablecloth and the glass.

Hope it helps.

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If a car, starting from rest, accelerates at 4.0 m / sec², then its velocity at the end of 8.0 seconds would be 32.0 meters per second.

The rate of change of the velocity with respect to time is known as the acceleration of the object.

As given in the problem if a car, starting from rest, accelerates at 4.0 m / sec ² , then we have to find its velocity at the end of 8.0 seconds,

By using the first equation of the motion to calculate the velocity of the car after 8.0 seconds.

v = u + a × t

  = 0 + 4.0 × 8.0

  = 0 + 32.0

   = 32.0 m / s

Thus, If a car, starting from rest, accelerates at 4.0 m / sec², then its velocity at the end of 8.0 seconds would be 32.0 meters per second.

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Answer:

v = -\frac{n \ m}{M} \ v'

for the man to return to the ship he must throw the balls in the opposite direction of the ship

Explanation:

For this exercise we can use the conservation of momentum. Let's form a system made up of man and baseballs.

Initial instant. Before throwing the balls

     p₀ = 0

Final moment. After throwing the balls

     \(p_{f}\) = M v + n m v '

where M is the mass of the man, m is the mass of each ball and n is the number of balls , v isthe speed man and v' is the speed ball

Since the forces are internal, the momentum of the system is conserved

     p₀ = p_{f}

      0 = M v + n m v ’

      \(v =- \frac{n \ m}{M} \ v'\)

If we analyze this expression, for the man to return to the ship he must throw the balls in the opposite direction of the ship

The impulse will be increased by 4 times, if the force acting on the object and the time of impact, both are doubled.

Impulse is defined as the change in momentum of an object. We know that time rate of change of momentum is equal to the exerted force.

Force = change in momentum(Δp)/time(t)

Also, Impulse = change in momentum(Δp)

So Impulse(I) = change in momentum =  F × t

So impulse is also defined as the product of force and the time of the impact.

I = F × t

if force and time are doubled then,

I₂ = 2F × 2t

I₂ = 4 F × t

I₂ = 4 × I

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The economic boom that followed World War II contributed to a blurring of the lines between the middle class and the working class through several key factors.

Firstly, the post-war economic prosperity led to increased job opportunities and higher wages for many workers. This resulted in an upward mobility for some working-class individuals, as they were able to attain higher-paying jobs and improve their standard of living. This upward mobility allowed them to enter the middle-class bracket.

Secondly, the expansion of the manufacturing and service sectors created a demand for a skilled workforce. This led to the growth of white-collar jobs that required specialized knowledge and education. As working-class individuals acquired the necessary skills and qualifications, they were able to secure these higher-paying white-collar positions, blurring the traditional boundaries between the middle class and the working class.

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