# Operating Systems

**Geometry**

Historically, why is the Cartesian Coordinate System unique? The system is unique because it's concept of using a pair of axes in a three dimensional format

**chemistry**

If the average volume of all the blood in a human body is 4700 mL, what is the molarity of DNA in the human blood system?

**Chemistry**

A buffer system contains 0.30 M NH4+ and 0.15 M NH3. pKa of NH4+ is 9.25. How many moles of NaOH must be added to 1.00 L of this solution to increase the pH to 9.25? Hint: What is the (NH3) / (NH4+) when the pH=pKa?

**Check my answers? Science**

The order of events and ages of rocks by examining positions is *relative dating*. Gaps in rock layers are called *unconformities*. What uses properties of atoms to find ages of rocks? *Absolute Dating*. A life form in Precambrian Time was *Cyanobacteria*. What signaled the ...

**P.E**

1. Air pollutants can do all of the following EXCEPT: A. damage the respiratory system. B. enter the bloodstream and harm other parts of the body. C. cause discoloration to your hair. D. reduce your protection from the sun's radiation.*** 2. True or False Biodegradable waste ...

**Geometry**

Which ordered pair is the solution to the system of equations below? {3x-7y=-10 {5x-y=-6 A system of equations is shown below 2x+y=7 3x-2y=0 What is the solution to the system?

**Education technology**

1. which of the following is an example of tangible property? A method for creating ice cream that you friend thought of An idea for an invention that your dad mentioned briefly but did not write down•• Song lyrics printed in a songbook A quicker system of washing a car ...

**Math**

X-3y=1 4x+5y=4 Solve the system of equations.

**Math**

A 100 point test contains a total of 20 questions. The multiple choice questions are worth 3 points each and the short response answer questions are worth 8 pints each. Write a system of linear equations that represents this situation, my answer is to correlate the 3 points ...

**social studies**

1. The Himalayas separate _________. (1 point) Pakistan and India the Indian subcontinent from the rest of Asia Afghanistan from the rest of South Asia northern and southern India 2. What impact do monsoon winds most have on South Asia? (1 point) Monsoon winds carry plenty of ...

**MATH HELP PLZ!**

Two cell phone companies have different rate plans. Runfast has monthly charges $25 plus $10 per gig of data. B A &D’s monthly charge is $18 plus 15 per gig of data. Your task is to determine under what circumstances each company has the better pricing. You will derive and ...

**Algebra 2**

1. What is the determinant of the matrix? [5 6] [2 9] a. -33 b. 6 c. -6 d. 33 <---- my answer 2. What is the determinant of the matrix? [-4 -5] [ 2 -6] a. -14 b. -34 c. 14 d. 34 <---- my answer 3. Which expression gives the x-coordinate of the solution of the system? 2x+...

**physics**

A bag of cement of weight 325N hangs from wires as Shawn. Two of the wires make angels al=60 degrees a2=50 degrees with the horizontal. If the system is in equilibrium find the tension T1, T2 and T3 in the wires.

**Math (Mrs. Sue, please help?)**

A system of equations is given below: y = 3x + 4 2x + 3y = 10 Which of the following steps could be used to solve by substitution? (4 points) 3x + 4 = 2x + 3y 2x + 3(3x + 4) = 10 2(3x + 4) + 3y = 10 3(y = 3x + 4) (I don't understand this at all and I've read through the module...

**Psychology**

5.Regarding the trichromatic theory of color vision, which statement is most accurate? A. The theory maintains that receptor cells are grouped in pairs, such as black-white. B. Specialized cells in the retina engage in a process called feature detection. C. Specialized cells ...

**Chemistry**

Consider the reaction N2(g)+3H2<-->2NH3(g). What is the effect of decreasing the volume on the contained gases The reaction shifts toward the product gas The system reacts by increasing the number of gas molecules*** the pressure on the gases decreases momentarily ...

**History**

5.)why would americans free states want slaves state to remain part of the united states as opposed to just letting them leave the union? A.)Federal trade laws, unequal taxation, and slavery B.)Cotton processing, the slave trade, and the federal banking system C.)Slavery, self...

**Math**

Solve the system of equations algebraically . show all your steps. Y=x^2+2x Y=3x+20

**Math**

Solve the system of equations algebraically. Show all of your steps. Y=x^2+2x y=3x+20

**Social Studies (please check Ms. Sue)**

Please check this. Thanks!!! 1. How did President John F. Kennedy most support civil rights? a. He favored voting rights laws.*** b. He organized a march. c. He established the Peace Corps. d. He rode "freedom buses." 2. Which of the following was a result of the Civil Rights ...

**math 1324**

a natural history museum borrowed $2,000,000 at simple annual interest to purchase new exhibits. Some of the money was borowed at 7%, some at 8.5%, and some at 9.5%. Use a system of linear equations to determine how much was borrowed at each rate if the total annual interest ...

**Science**

In a heat engine, if 700 J of heat enters the system, and the piston does 400 J of work, what is the final internal (thermal) energy of the system if the initial energy is 1,200 J?

**health and physical**

your digestive system has three main functions:digestion, absorption and elimination. in which organ dose absorption begin? a. mouth*** b.stomach c.small intestine d.gallbladder i think a.mouth

**health**

without this system in the body you would get really sick because toxins and waste would build up. 1. cardiovascular 2. excretory 3.integumentary 4. muscular

**health and physical**

the noise diaphragm and lungs are part of the _____ system A. circulatory B. excretory C.nervous D.respiratory

**health**

The peripheral nervous system (select all that apply) Is made up of the brain and spinal cord Links the body to the brain and spinal cord Is made up of sensory and motor neurons Is responsible for thought and reasoning I think it could be b and c?

**pre-algebra**

Directions: Follow the instructions below to design a fair race for the new video game Animal Tracks. 1. Choose two animals with different speeds. You can choose from the chart that starts at the bottom of this page or do research to choose your own. 2. Design a fair race in ...

**history**

1. How did president John F. Kennedy most support civil rights? a. He favored voting rights laws ** b. He organized a march c. He established the peace corps d. He rode “freedom buses” 2. Which of the following was a result of the civil rights act of 1964 a. Civil rights ...

**Earth science**

What is an example of a stable system? How were you able to determine whether or not this system is stable? Please don't attach files, my parents do not allow me to click on any attached files!

**Science**

What is an example of a stable system? How were you able to determine whether or not this system is stable? I really appreciate your help!

**Accounting**

Aunt Rhea Corporation Income Statement For the Year Ended December 31, 2015 Service Revenue $ 900,000 Operating Expenses 700,000 Net Income before Income Tax $ 200,000 Gain on Investment Sale 10,000 Net income Before Income Taxes $ 210,000 Income Tax Expense 90,000 Net Income...

**Physics**

A 1.8 kg piece of a metal initially at a temperature of 180oC is dropped into the water with mass of 14 kg. The water is in a container made of the same metal with mass 3.6 kg. The initial temperature of the water and container is 16.0oC, and the final temperature of the ...

**health and PE**

The brain and spinal cord make up the reflex pathway. peripheral nervous system. central nervous system. the fight-or-flight response is it b?

**HEALTH PLZ HELP**

1.Which organization would be the most helpful on providing you with information on how to stop using tobacco? A. American kidney foundation B. American cancer society C. American Legacy*** D. American Society of non-Smokers 2. In nature nicotine acts as a(n) A. Growing agent ...

**history please help**

1. Select a new deal program that helped improve the lives of south Carolinians. Explain what the program improved and how it helped the people of South Carolina 2. Explain how rationing affected the people on the home front during world war II. how did this behavior help the ...

**College Algebra Help?!**

If a customer purchases a new stereo system during the spring sale, he may choose any 4 CDs from 20 classical and 32 jazz selections. In how many ways can the customer choose 2 of each?

**Math, Please help.**

1. Choose two animals with different speeds. You can choose from the chart that starts at the bottom of this page or do research to choose your own. 2. Design a fair race in which the two animals have an equal chance of winning if they race at their top speed. Here are a few ...

**Biology 9th grade**

I am stuck on a question on The Integumentary System, the question is Water molecules in the blood pass through the walls of the (blank) into the sweat glands. I am not sure, can someone help me, thanks.

**life sciences**

Genetic and Gregor Mendel's with nervous system

**Math**

I am just stating, I do not want people to give me the answers to this, I would just like to have someone walk through it with me. Just making that clear, thank you. Directions: Follow the instructions below to design a fair race for the new video game Animal Tracks. 1. Choose...

**Social Studies, are they all right?**

1. In a typical rural village in Mexico, you might expect to find that most people living on farms get their food by a. growing their own. b. buying what they need at large supermarkets. c. buying what they need at small supermarkets. d. gathering nuts and wild berries. 2. ...

**8th grade math - system of equations**

I'm not sure how to solve these. Solve using any method (substitution or elimination) 23. The sum of two numbers is 27. The larger number is three more than the smaller number. What are the two numbers? Ans: l = large; s = small l + s =27 and l = 3S 3s + s =27 4s =27 4s/4 = 27...

**chemistry**

A student designs an ammeter (a device that measures electrical current) that is based on the electrolysis of water into hydrogen and oxygen gases. When electrical current of unknown magnitude is run through the device for 1.00 min , 15.4 mL of water-saturated H2(g) is ...

**Math**

Directions: Follow the instructions below to design a fair race for the new video game Animal Tracks. 1. Choose two animals with different speeds. You can choose from the chart that starts at the bottom of this page or do research to choose your own. (I chose elephant which is...

**U.S. History (Check, Please!)(REED)**

1. What was the Doolittle Raid? A: The Doolittle Raid was the first air raid by the United States on the Japanese capital Tokyo during WWII. Led by Lieutenant Colonel James Doolittle, this raid had to be executed twelve hours early due to the U.S. carriers being discovered by ...

**Physics**

Many hot-water heating systems have a reservoir tank connected directly to the pipeline, so as to allow for expansion when the water becomes hot. The heating system of a house has 57.4 m of copper pipe whose inside radius is 7.52 x 10- 3 m. When the water and pipe are heated ...

**Biology**

1. Fill in the five levels of human body organization. AND 2. Place the five examples below in order from largest to smallest: You, Stomach, Epithelial Tissue, Digestive System, Parietal cells. ~~~~~~~ I don't know the first one but I think that the second one is: You...

**Chemistry**

What is the internal energy if system absorbs 100J of heat and does 50J of work on the surrounding?

**physics**

Four point masses, each of mass 2.0 $kg$ are placed at the corners of a square of side 1.4 $m$. Find the moment of inertia of this system about an axis that is perpendicular to the plane of the square and passes through one of the masses. The system is set rotating about the ...

**academic and communicative skills**

a speech on health care delivery system on a nose dive

**Writing Sentences and Paragraphs**

As an individual with experience performing office clerical duties and educated as a Library Technician, I am excited to apply for the position of Data Entry Clerk as advertised on the DC Comics website. I consider that my experience and skills match ver well with your ...

**Technology**

What do you think a counterweight does for a mine winding system

**Social Studies**

which of the following were significant features of jimmy carter's political career? 1.he appointed many african americans to political office 2.he was the first president to come from georgia 3.he only held one political office in his career 4. he beat Ronald Regan in the ...

**Physics2**

Three capacitors, each of capacitance 120 pF, are each charged to 500 V and then connected in series. Determine (a) the potential difference between the end plates, (b) the charge on each capacitor, and (c) the energy stored in the system

**Phys1**

A 2μF capacitor is charged to 50V and then connected in parallel with a 4μF capacitor charged to 100 V.? Determine (a) the charge and potential difference of the system, (b) the charge on each capacitor of the system, (c) the energy stored in the system, (d) the ...

**Phys**

Three capacitors, each of capacitance 120 pF, are each charged to 500 V and then connected in series. Determine (a) the potential difference between the end plates, (b) the charge on each capacitor, and (c) the energy stored in the system.

**Physics**

Question Three capacitors, each of capacitance 120 pF, are each charged to 500 V and then connected in series. Determine (a) the potential difference between the end plates, (b) the charge on each capacitor, and (c) the energy stored in the system.

**Physics**

two particles of mass m1=1.5 kg, and m2=3.5 kg undergo a 1-dimensional head-on collision. Their velocities along x are V1i=12 m/s, and V2i=-7.5 m/s. The 2 particles stick together after the collision. a.) Find the velocity after the collision. b.) How much kinetic energy is ...

**Chemistry**

A reaction between gaseous sulfur dioxide and oxygen gas to produce gaseous sulfur trioxide takes place at 600◦C. At that temperature, the concentration of SO2 is found to be 1.14 mol/L, the concentration of O2 is 1.39 mol/L, and the concentration of SO3 is 3.18 mol/L. ...

**Math**

Solve the system below: Y= x^2-4 Y= -4 A. 0, -4 B. -4, 0 C. 0, -4)(-4,0 D. No solution

**algebra!!!!**

Solve the system below. y=x2-2x-6 y=4x+10 A. (-2, 2) B. (8, 42) C. (-2, 2) (8, 42) D. There is no real solution

**Technology**

What is the machanical advantage of this system?

**math**

Two cell phone companies have different rate plans.Runfast has monthly charges $25 plus $10 per gig of data.B A&D’s monthly charge is $18 plus 15 per gig of data. Your task is to determine under what circumstances each company has the better pricing. You will derive and ...

**math**

Two cell phone companies have different rate plans.Runfast has monthly charges $25 plus $10 per gig of data.B A&D’s monthly charge is $18 plus 15 per gig of data. Your task is to determine under what circumstances each company has the better pricing. You will derive and ...

**Social Studies (please check ms. sue)**

1. Why did farm prices fall in the 1950’s? a. Farmers bought new expensive machinery b. Farmers produced more than they could sell*** c. Farmers could not sell their products in Europe d. Farmers saw their government subsidies reduced 2. What shortage was created by the-...

**science**

write down the possible terms of one electron system corresponding to n=2

**Physics**

Suppose you have a system of two masses strung over a pulley. Mass 1 (6.5 kg) hangs on the right side of the pulley suspended over the ground at height 1 m. Mass 2 (2.2 kg) hangs over the left side of the pulley and rests on the ground. The pulley is a uniform disk of mass m ...

**Physics**

A hoop of radius 1.4 m and mass 11.5 kg has a small ball stuck to its inside surface. The ball has a radius of one quarter that of the hoop, and twice the hoop’s mass. The hoop may roll freely, without slipping. Similarly, the ball may roll along the inside of the hoop ...

**Physics**

Calculate the distance, in m, of the centre of mass of the Earth-Moon system from the centre of the Earth. Note: the mass of the Moon is 7.35x10 22kg, the mass of the Earth is 5.98x10 24kg, and their separation is 3.85x10 8m.

**physics**

The drawing shows an outstretched arm (0.61 m in length) that is parallel to the floor. The arm is pulling downward against the ring attached to the pulley system, in order to hold the 126-N weight stationary. To pull the arm downward, the latissimus dorsi muscle applies the ...

**Bio**

What is an advantage of using an organism's scientific name rather then its common name? A.The scientific name is always given in the native language B.The scientific name is based upon the organism's kingdom and phylum C.The scientific name does not depend on any ...

**english**

describe how the us justice system effects children who are people of color versus white kids.

**math**

length of a piece of wood must measure between 15 and 17 centimeters and the width must measure between 9 and 11 centimeters. write a system of linear inequalities to represent the possible dimensions of the wood,in inches,given that 1 inch equals 2.54 centimeters. plz do help...

**history please help**

1. Why did farm prices fall in the 1950’s? a. Farmers bought new expensive machinery b. Farmers produced more than they could sell** c. Farmers could not sell their products in Europe d. Farmers saw their government subsidies reduced 2. What shortage was created by the-world...

**Math**

Solve the system. 3x^2+4x-y=8 y+3=2x^2+4x

**History**

What was the Columbian Exchange? A. The exchange of new goods globally as a result of European exploration B. A trading post established by Christopher Columbus C. An economic system set up by Christopher Columbus in the Americas D. The trading of goods from Columbia to North ...

**World History**

Can somebody check over my answers my answers are : B;C;B;A;D;C;A;B;D;C;A;B;B;B;C;D;A;A;B;C;… C;D;1. Trench warfare caused the immobilization of troops on the (1 point)Western Front.Middle Eastern desert.Eastern Front.mountains in Russia.2. After the war, Britain ...

**Physics**

The Atwood Machine consists of two masses suspended form a fixed pulley. If the first mass is 0.55kg and 0.8kg, (a) what is the acceleration of the system? (b) What is the magnitude of the tension in the string? (consider the pulley to be frictionless and the masses of the ...

**math**

Directions: Follow the instructions below to design a fair race for the new video game Animal Tracks. 1. Choose two animals with different speeds. You can choose from the chart that starts at the bottom of this page or do research to choose your own. 2. Design a fair race in ...

**physics**

A capacitor A1B1 of capacitance C1=2microF is charged under a voltage U1=20V and then isolated. a) Calculate the voltage U (A1B1) between its plates, and it's charge Q1 and energy W1. b) The plates A1 and B1 are connected to those A2 and B2 of an uncharged capacitor of ...

**Algebra**

Directions: Follow the instructions below to design a fair race for the new video game Animal Tracks. 1. Choose two animals with different speeds. You can choose from the chart that starts at the bottom of this page or do research to choose your own. 2. Design a fair race in ...

**Math**

Directions: Follow the instructions below to design a fair race for the new video game Animal Tracks. 1. Choose two animals with different speeds. You can choose from the chart that starts at the bottom of this page or do research to choose your own. 2. Design a fair race in ...

**Math**

So I'm doing solving system of equations, 2x+y=5 4x+2y=10 I found no solution that would fit it therefore they are parallel to each other. Am I correct?

**Math Help Please!**

Solve the system of equations algebraically. Show all of your steps. y=x^2+2x y=3x+20 Can someone please explain to me how to do this? I want to actually learn it, please. Thanks! :)

**chemistry**

Consider the equilibrium reaction CO(g)+H2O(g)⇋CO2(g)+H2(g) Determine how each change in the left-hand column will stress the system and in which direction the equilibrium reaction will shift in response.

**physics**

Two bodies a and b masses 4kg and 2kg move towards each other with velocities 3m/s and 2m/s and collide. If the collision is perfectly inelastic, find the velocity of the 2 bodies after collision. Find the tolal kinetic energy of the system before and after collision, hence ...

**physics**

a helium nuclide of mass M1 moving with initial velocity V is incident on a stationary of mass M1. After collision M1 was deflected through an angle x and M2 an angle y. If the velocities of the nuclides after collision were V1 and V2 respectively, show that for an elastic ...

**science**

a helium nuclide of mass M1 moving with a velocity Vo is incident on a stationary nuclide of mass M2. After collision M1 was deflected through an angle x and M2 an angle y. If the velocities of the nuclides after collision were V1 and V2 respectively show that for an elastic ...

**PHYSICSSS emergency**

= 1.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 60 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.4 kg that hangs vertically. The system starts from rest with the spring unextended b) ...

**physics!**

In its search for flying insects, a bat uses an echolocating system based on pulses of high frequency sound. These pulses are 2.0 ms in duration, have a frequency of 50 kHz, and an intensity level of 100 dB at 1.0 m from the bat’s mouth. Assume the bat produces acoustic ...

**Math**

ABC Game store sells new games, n, for $19 and used games, u, for $9. The store earned $7500 in revenue last month. The store sold 4 times as many used games as new games. Write a system of equations that represents this scenario.

**math**

Write a matrix that represents the system of equations below. 7x – 3y = 21 5x – y = 85

**science help pls pls pls**

A new object, Object Y, was discovered outside our solar system. Object Y is small and rocky, is not a satellite of any other object, and it does not have enough gravity to clear away smaller objects near its orbit. The characteristics of Object Y most closely resemble those ...

**Psychology**

What kind of disorder does this person. I think he have schriozophenia. Mr. Jameson is a white 42-years old man who has never been married and is currently unemployed. He was brought to the emergency room by the police for striking an elderly woman in his apartment building. ...

**PHYSICS PLS HELP ME EVERYONE**

m1 = 1.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 60 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.4 kg that hangs vertically. The system starts from rest with the spring unextended ...

**Math**

Genny babysits for two different families. One family paints her $6 an hour and a bonus of $20 at the end of the night. The other family pays her $3 every half hour and a bonus of $25 at the end of the night. Write and solve the system of equations that represent this ...

**Social Studies**

In Athens the system of government became a direct democracy, in which the people participated directly in government. In the Roman republic, citizens participated in government A.in the identical way B.through meetings held in the marketplace C.by taking turns serving as ...

**science**

10 students whose combined mass is 700 kg ride down 30 m in a elevator. How much thermal energy is produced in the elevator system by the loss in gravitational potential energy of the students

**Chemistry**

For the reaction: 2NO(g) + H2(g) <=> N2O(g) + H2O(g) + energy Write the equilibrium constant expression for the reaction. I wrote: [N2O][H2O] / [NO]2 [H2] This reaction takes place at 25°C. At this temperature the concentration of NO is found to be 1.75 mol/L, the ...

**Science**

For the reaction: 2NO(g) + H2(g) <=> N2O(g) + H2O(g) + energy Write the equilibrium constant expression for the reaction. This reaction takes place at 25°C. At this temperature the concentration of NO is found to be 1.75 mol/L, the concentration of H2 is 3.00 mol/L, the...