As defined in physics "work" is

Answer:

can't do it here

Explanation:

can't draw in here sorry dude

Answer:

[tex]a=0.1\ m/s^2[/tex]

Explanation:

Given that,

Initial velocity, u = 0

Final velocity, v = 2 m/s

Time, t = 20 s

We need to find the acceleration of the swimmer. The acceleration of an object is equal to the change in velocity per unit time. It can be given by :

[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{2\ m/s}{20\ s}\\\\a=0.1\ m/s^2[/tex]

So, her average acceleration of the swimmer is [tex]0.1\ m/s^2[/tex].

Answer: a  I guess

Explanation:

I ate a potato with my most pullged for science i tasted it not good

Answer:

As you may know, each element has a "fixed" number of protons and electrons.

These electrons live in elliptical orbits around the nucleus, called valence levels or energy levels.

We know that as further away are the orbits from the nucleus, the more energy has the electrons in it. (And those energies are fixed)

Now, when an electron jumps from a level to another, there is also a jump in energy, and that jump depends only on the levels, then the jump in energy is fixed.

Particularly, when an electron jumps from a more energetic level to a less energetic one, that change in energy must be compensated in some way, and that way is by radiating a photon whose energy is exactly the same as the energy of the jump.

And the energy of a photon is related to the wavelength of the photon, then we can conclude that for a given element, the possible jumps of energy levels are known, meaning that the possible "jumps in energy" are known, which means that the wavelengths of the radiated photons also are known. Then by looking at the colors of the bands (whose depend on the wavelength of the radiated photons) we can know almost exactly what elements are radiating them.

Answer:

I dont know what to answer so im just gonna say ok

Answer:

height =15m

Explanation:

gpe=mgh

750=5×10×x

50x=750

x=15

hope it helps

Answer

D. move a small magnet back and forth within a section of the coiled wire.

Explanation:

i put that for the test and i got it right

Answer:

d

Explanation: got it right

Answer:

Explanation:

Is this a velocity time graph?

Answer:

a) Q = 12600000 [J]

b) t = 4200 [s] or 70 [min]

Explanation:

To solve this problem we must use the following equation that is defined as the heat equation, this equation relates the mass to the specific heat and temperature changes.

Q = m*Cp*(T_f - T_i)

where:

Q = energy as heat [J] (units of Joules)

Cp = specific heat = 4200 [J/Kg * °C]

T_f = final temperature = 60 [°C]

T_i = initial temperature = 10 [°C]

m = mass = 60 [kg]

Q = 60*4200*(60 - 10)

Q = 12600000 [J]

b)

To calculate the time, we know that the power is equal to the energy generated over the given time.

P = Q/t

where:

P = power = 3000 [W]

t = time [s]

t = Q/P

t = 12600000/3000

t = 4200 [s] or 70 [min]

Answer:

D. 6 m/s²

Explanation:

Given parameters:

Initial velocity  = 36m/s

Final velocity  = 0m/s

Time taken = 6s

Unknown:

Acceleration of the car  = ?

Solution:

Acceleration is the rate of change of velocity with time;

 Mathematically;

     Acceleration   = [tex]\frac{v - u}{t}[/tex]

v is the final velocity

u is the initial velocity

t is the time

 Acceleration  = [tex]\frac{0 - 36}{6}[/tex]   = -6m/s

The acceleration of the car must have been 6m/s²

Answer: False

Explanation:  

Answer:

False

Explanation:

Answer:

Ryan Upchurch

For many years I have learned a lot of things about him, Upchurch music, and his crazy aspects of life. And If there was A day then I got a list of things to do with him. First things first or me this is a hard question for a part of me would like to sit down with Ryan in a boardroom and discuss humanitarian ideas and share my opinions with them.

A part of me would like to go back in time and talk with the only person I wanted an autograph from, Katie Noal  I would discuss her concepts in her songs, ask if I could get some pointers, and finally ask her to sing one of her songs.

But then again Ryan does not like her so it would only be fair to spend the day with him., she is amazing and I love her humor. And he is sharp and quick as a whip. My time with him would leave me busting a gut laughing so hard. It would be on my bucket list of things to do.

Now at this time, I would eat some chicken some good fried chicken with some mash potatoes his wife would have made. You know he is just a funny person he has a comedian personality, it would be a joyous time to spend with him. Then we would take a drive and he can show me where he grew up and some crazy memories or life lessons on the way.  And explain some of his songs to me like my favorite ¨Vinyl¨.

I would ask Ryan where he took his plots from and what his aspects are of  life and who inspired him along the way. Or to just do nothing and have almost forgotten how to think; for picturing in his mind, and for writing his songs for all of us to enjoy. A proud man who wanted to become invisible but the accomplished task did not bring him happiness and instead brought him Fame.

I would be especially interested in asking him about “Everlasting country¨. Who was that person or what were the events, which prompted him to create an image of severe, almost help of countless operations in the country and America. However, Upchurch and I would go very soon they forget everything they were taught and… over and over again. If I could spend the day with him I hope that we could go mudding and just enjoy him.

I am always interested in the way that how he writes his songs and express how he feels about America. Now I would love to help him write a song and I would call It ¨Country time love¨. After all that we would sit and enjoy the campfire and eat some Smores :) Or I would ask him when and how he preferred to write, whether his stories were long in the making etc.

And finally, the last question that I would ask Ryan Upchurch is to compare his time with the other singers and analyze if any of his most gloomy predictions have come true about how he see life. Of course, Upchurch will hardly consider the agenda, and modern achievement such high standards for people. After that long day with him, I would think of him for everything we had done for the day. Maybe he would understand how I feel about the way I see life and how he has changed the way I look at life. That he would develop and these events would happen some time so he was able to make a song putting it as me and his song. Cause that would be very exciting! I hope that maybe this day will come and I will get to remember that day and hope that I will get to see him again like go to a concert or just hang out for the day.Therefore If I spent a day with Ryan I would Eat some chicken go mudding and sit by the fire and enjoy some good music.

Explanation:

Answer:

If I were given a chance to meet anybody who has ever lived and spend the whole day talking to that person, I would choose the French Queen Marie Antoinette. The reason for my choice is not her extraordinary talents or achievements; instead, I am interested in how an ordinary woman could have made it through the turmoil of the dark times for the French monarchy, a difficult marital relationship and never lose her sense of dignity.

I admire Marie Antoinette first of all for having endured the challenge of spending all or most of her time in public when she was still the wife of the French dauphine when she had to “on my rouge and wash my hands in front of the whole world” (Wikipedia, 2006). To a certain degree, each of us has to endure the challenge of being in public with one’s thoughts and feelings, and I would ask her how she was able to withstand this trial. I would also ask her how she managed to remain modest and nice to people surrounding her so that Jeanne Louise Henriette Campan in his memoirs remembered of her as “unwilling … to be reminded of her elevation” (Campan, 2004, p. 10).

I would want to see the person who, by will of chance, was lifted to the highest position a woman could command in Europe of those times, yet remained affable and pleasant to her subordinates and unwilling to impress herself on them and humiliate anybody at a time when it was all too common in the nobility.

If we had a chance to talk at length with Marie Antoinette, I would also ask her what she considers to be her mistakes at court and how she would have corrected them if given a chance. She surely had quite a few, but, after all, historian Simon Sebag Montefiore could have been right saying that Marie Antoinette was “a woman more sinned against than sinning” (Wikipedia, 2006). I am interested in learning what she thought of her life when it came to such a disastrous end as the execution in the French Revolution. Did she blame the crowd? Or was she reproaching herself for not having done more to protect her image in the eyes of the people? Marie Antoinette surely could not have averted the revolution that happened because of someone else’s sins, but she perhaps had a chance to appear less self-indulgent to the people.

This is one more thing I could address, as well as ask how she could demonstrate that outstanding courage when she stood on the balcony of the royal palace in Versailles at the point of many guns aimed at her, and how she could have been so strong at the time of the execution. I believe that her strength demonstrates what an ordinary woman can do in the face of danger and teaches us a lot about how one should never lose a human face when challenged in any way. A talk with Marie Antoinette could give me profound insights into the nature of people and reveal many interesting points.

Explanation:

The vertical forces cancel, so only the horizontal forces are included in the net force. If the right is positive and the left is negative, then

50 N + (-20 N) = 30 N

so the net force is (B) 30 N to the right.

Answer:

(B) 30 N to the right.

Explanation:

Answer:

ca is carbon dioxide h20 is water

Explanation:

Answer:

Explanation:

Step one:

given

mass m= 24kg

distance moved= 6m

time taken= 4seconds

Step two:

Required

power

but work done is the force applied at a distance, and the power is the work done time the time taken

Work done= F*D

F=mg

W= mg*D

W=24*9.81*6

W=1412.6J

Power P= work * time

P=1412.6*4

p=5650.5W

P=5.6kW

Answer:

420m

Explanation:

Given parameters:

Time  = 5minutes

Average speed  = 1.4m/s

Unknown:

Distance covered  = ?

Solution:

Speed is the rate of change of distance with time.

 Mathematically;

              Speed  = [tex]\frac{distance}{time}[/tex]  

    Distance  = speed x time

Insert the parameters and solve;

   Convert the time to seconds;

              1 minute = 60s

               5 minute = 5  x 60 = 300s

So,

   Insert the parameters and find the distance;

     Distance  = 300 x 1.4  = 420m

Answer:

yes____________??__________

Answer:

D. Freely moving electrons hold the magnesium atoms together, and

the attraction of opposite charges holds the aluminum and iodine

atoms together.

Explanation:

The chemical bonding between atoms of magnesium (Mg) different  from the chemical bonding is Option D.

The following information should be considered:

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Answer:

2.3s

Explanation:

The total time in flight is 2.3s.

Therefore, the time it takes the canon ball to reach its peak is also the total time of flight is 2.3s.

Answer:

Transverse Wave

Explanation:

Longitudinal: vibrates in the same direction

Propagated: the direction the wave travels (specific to wave type)

Amplitude: from equilibrium to crest or trough

Answer:

Explanation:

Commonly area is a scalar quantity because there is no need of direction to define and also follow the algebrac summation. When we talk about vector there exist a frame of reference with a certain orogin

Answer:

I believe the answer is D or B mostly D

Explanation:

Answer:

SCMaglev, Located in Japan

Explanation:

Answer: answer is in explanation

Explanation:

A doorknob - about 10cm for diameter and the force that causes the torque comes from the person turning the doorknob causing friction. It’s used to open and close doors.

A screwdriver- 2m for diameter and the force that causes the torque comes from the person applying pressure and causing the screwdriver to turn with friction. It’s used to screw a screw into the wall or into an object.

Car wheels- about 12inches in diameter and the force that causes the torque comes from the engine’s chemical force and friction against the road. They’re used to make a car go and stop.

Electric fan- 14 inches in diameter and the force for torque comes from the electricity circulating from the fan making it spin to provide the air coming out of the fan. They’re used to provide people with air as a cooling system.

Pizza cutter- 10cm in diameter and the force for torque comes from the pressure being applied on the handle and the friction between the pizza and the pizza cutter. They’re used to cut pizza.

Winch

Analog clock

Windmill

Water wheel

Skateboard

The different types of wheels that we see very often is doorknob, screwdriver, cartwheels, an electric fan and pizza cutter.

The rotatable counterpart of linear force in mechanics and engineering is torque. Depending on the context of study, it is also known as a moment, point in time of force, rotating force, or turning effect.

A doorknob with a diameter of around 10 cm creates the torque because of friction created by the person twisting the doorknob. Doors are opened and shut with it.

A screwdriver with a diameter of 2 meters produces a torque when someone applies pressure, making the screwdriver turn against resistance. It is employed to fasten a screw to a surface or an item.

Car wheels are roughly 12 inches in diameter, and the torque is produced by the chemical force of the engine and friction with the ground. They are utilized to start and stop vehicles.

Electric fan with a 14-inch diameter; the energy running through the fan causes it to spin, producing the air that flows from the fan. They serve as a conditioning system by providing air to individuals.

Pizza cutter, diameter 10 cm; torque produced by the resistance between the pizza as well as the pizza cutter, as well as pressure applied to the handle. The pizza is cut using these.

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Answer:

C. rollback

Explanation:

The retina of the eye is located inside the eye making it impossible for the retina to roll back. Only the eye itself can rollback.

Answer:

The behavior of an object that has been charged is dependent upon whether the object is made of a conductive or a nonconductive material. Conductors are materials that permit electrons to flow freely from particle to particle. An object made of a conducting material will permit charge to be transferred across the entire surface of the object. If charge is transferred to the object at a given location, that charge is quickly distributed across the entire surface of the object. The distribution of charge is the result of electron movement. Since conductors allow for electrons to be transported from particle to particle, a charged object will always distribute its charge until the overall repulsive forces between excess electrons is minimized. If a charged conductor is touched to another object, the conductor can even transfer its charge to that object. The transfer of charge between objects occurs more readily if the second object is made of a conducting material. Conductors allow for charge transfer through the free movement of electrons.

In contrast to conductors, insulators are materials that impede the free flow of electrons from atom to atom and molecule to molecule. If charge is transferred to an insulator at a given location, the excess charge will remain at the initial location of charging. The particles of the insulator do not permit the free flow of electrons; subsequently charge is seldom distributed evenly across the surface of an insulator.

While insulators are not useful for transferring charge, they do serve a critical role in electrostatic experiments and demonstrations. Conductive objects are often mounted upon insulating objects. This arrangement of a conductor on top of an insulator prevents charge from being transferred from the conductive object to its surroundings. This arrangement also allows for a student (or teacher) to manipulate a conducting object without touching it. The insulator serves as a handle for moving the conductor around on top of a lab table. If charging experiments are performed with aluminum pop cans, then the cans should be mounted on top of Styrofoam cups. The cups serve as insulators, preventing the pop cans from discharging their charge. The cups also serve as handles when it becomes necessary to move the cans around on the table.

Electrical conductors are made up of metals such as, copper, aluminum, etc. These metals are used to make wires. Most wires are made out of copper because it conducts electricity with high flexibility and very little resistance.

"A conductor, or electrical conductor, is a substance or material that allows electricity to flow through it. In a conductor, electrical charge carriers, usually electrons or ions, move easily from atom to atom when voltage is applied."

"Electricity is both a basic part of nature and one of the most widely used forms of energy. The electricity that we use is a secondary energy source because it is produced by converting primary sources of energy such as coal, natural gas, nuclear energy, solar energy, and wind energy, into electrical power."

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Answer:

B

Explanation:

using f=ma

a=f/m

=4000/2000

=2 m/s2