Sunday

July 5, 2015

July 5, 2015

Total # Posts: 4,378

**Physics**

An object starts from rest an under a constant acceleration has traveled a displacement of 30.5 meters when it reaches a certain final velocity. The same object starts from rest, but has an acceleration which is a factor of 3.3 times smaller than the original acceleration. If ...
*September 8, 2014*

**government**

Originalists often hold that it is incorrect to use the Equal Protection Clause of the Fourteenth Amendment to strike down laws that discriminate because? 1 it runs contrary to the 10th Amendment. 2 laws that discriminate must be said to reflect the will of the majority. 3 it ...
*September 5, 2014*

**statistics**

Four girls (say I, II, III and IV) are to rank 3 different types of cake (say A, B and C) in a blindfold test. Each girl ranks the three cakes as 1 (for the cake she likes the best), 2 and 3, and then the assigned ranks of each type of cake are summed. Assume that each girl is...
*September 5, 2014*

**statistics**

An urn contains 10 balls of which 6 are white, 3 are red and 1 is green. Two balls are drawn at random from the urn. Find the probability distribution of number of white balls drawn. Hence state the expected number of white balls one can get in such a draw.
*September 5, 2014*

**English 11**

I dont understand how did he disservice American farmers?
*September 4, 2014*

**biology**

How could you explain this statement "An ecosystem is constantly changing ,yet it remains the same."
*September 3, 2014*

**AP Calc. AB**

In general, if lim x->a m(x) does not exist and lim x->a n(x) does not exist, is it true that lim x->a [m(x)+n(x)] does not exist? How about lim x->a [m(x)*n(x)]
*September 3, 2014*

**11 Physics**

my teacher gave me this question for review and i don't know how to do it!! HELP!!! A ball is thrown upwards, from a building. It's height(h), in meters above the ground seconds(t) after being thrown is given by h(t)=-5t^2+15t+50 a) How tall is the building? (explain ...
*September 3, 2014*

**Chemistry**

A container is fabricated from steel having a thickness of 0.500 inch and an average density of 7.85 g/cm3. (You may assume that the container is cylindrical with hemispherical ends.) What is the mass of the filled container, assuming that liquid propane has a density of 0....
*September 3, 2014*

**Science **

The inner planets- Mercury, Venus, Earth and Mars- were formed by a. Supernovas b. repeated collisions of asteroid sized debris (My Answer) ****** c. masses of cold hydrogen and helium d. collisions of large galaxies
*September 2, 2014*

**math**

write 4% as a fraction form
*September 1, 2014*

**Pre-cal **

The equation of the line joining the complex numbers -5 + 4i and 7 + 2i can be expressed in the form az + b*overline{z} = 38 for some complex numbers a and b. Find the product ab. Any help?
*September 1, 2014*

**US History**

then what north american tribes fit in these categories
*August 31, 2014*

**US History**

1.In what ways did groups of natives change the environment they lived in? Use at least 3 examples of tribes in North America. 2. What social, political and economic structures did native tribes set up to help them be successful?
*August 31, 2014*

**Calculus AB**

Does it have an undefined limit.
*August 29, 2014*

**Calculus AB **

Consider the function (4)/(1-2^(1/x)) 1. Estimate the right-hand limit, lim x->0+ f(x). Back up your answer by making an analytic argument about f(x) for values of x that are close to 0 but larger than 0. 2. Estimate the left-hand limit, lim x->0- f(x). Back up your ...
*August 29, 2014*

**algebra**

identify one rational number and one irrational number that are members of the interval (-8,8)
*August 28, 2014*

**science**

When a test charge q0 = 9 nC is placed at the origin, it experiences a force of 8 times 10-4 N in the positive y direction. (c) If this force is due to a charge on the y axis at y = 3 cm, what is the value of that charge? so in a I found E to be 88888.889 in b I found the F on...
*August 28, 2014*

**science**

thanks!I also have a question about this one. When a test charge q0 = 9 nC is placed at the origin, it experiences a force of 8 times 10-4 N in the positive y direction. (c) If this force is due to a charge on the y axis at y = 3 cm, what is the value of that charge? so in a I...
*August 28, 2014*

**science**

A particle beam is made up of many protons each with a kinetic energy of 3.25times 10-15J. A proton has a mass of 1.673times 10-27kg and a charge of +1.602times 10-19C. What is the magnitude of a uniform electric field that will stop these protons in a distance of 2 m? I am ...
*August 28, 2014*

**Math **

Pete is 5.77 cm taller than Kyle. Kyle is 155.09 cm tall. How tall is Pete?
*August 26, 2014*

**Math **

Pete is 5.77 cm taller than Kyle. Kyle is 155.09 cm tall. How tall is Pete?
*August 26, 2014*

**math**

how do you do it without using a calculator?
*August 26, 2014*

**math**

Find two unit vectors that make an angle of 60° with v = <6, 8>
*August 26, 2014*

**Us history**

They started to hate America
*August 20, 2014*

**Chemistry**

Thank you. Thank you. A lot
*August 20, 2014*

**Chemistry**

No that's wrong, it's 28, divide 2, get N2
*August 20, 2014*

**Chemistry**

3.57 moles equals n, so i divide 7.9 by that to get grams per mole, which is 2.2. I divide that by 2 to get Hydrogen, but that's wrong
*August 20, 2014*

**Chemistry**

To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 5.3-L bulb, then filled it with the gas at 1.30atm and 27.0 ∘C and weighed it again. The difference in mass was 7.9g . Identify the gas. Express your answer as a ...
*August 20, 2014*

**Chemistry**

107.95 atm
*August 20, 2014*

**Chemistry**

38.37
*August 20, 2014*

**physics**

calculate the amount of work it takes to increase a cars speed from 10mph to 30 mph and from 50mph to 60mph. Is more work required for 10mph to 30mph?
*August 6, 2014*

**physics**

a man with a 45kg mass dove 12m from a building into 0.32m of water. a)what was his kinetic energy when he hit the water? b)what average net force was exerted on him when he stopped?
*August 6, 2014*

**physics**

a 1.2 kg ball drops vertically onto the floor, hitting with a speed of 25m/s. it rebounds with an initial speed of 10m/s. a) what impulse acts on the ball during the contact? b) if the ball is in contact with the floor for 0.20 s, what is the magnitude of the average force on ...
*August 6, 2014*

**current political issue**

Explain how nurse leaders can use professional organizations to stay aware of political actions in the nursing and health care industry and the importance of doing so
*July 31, 2014*

**Political Issue**

Select a professional organization in the nursing industry. Researching a current political issue addressed through the organization.
*July 31, 2014*

**physics**

a 60g golf ball leaves the face of the club with a velocity of 75m/s. if the club exerted an average force of 3.0x10to the 4th N, what was the time of impact between the club and the ball?
*July 30, 2014*

**physics**

a 50kg box is pushed up a 30 degree plane which is 100m long. what is the speed of the box after being pushed the 100m? Mk=0.1
*July 30, 2014*

**Chemistry**

how would you prepare 250 ml of 0.69m al2(so4)3 solution from a 2.0 al2(so4)3 stock solution
*July 29, 2014*

**Intro to computers**

The command prompt found on Windows 7 and Windows 8 is very similar to the interface of what past operating system?
*July 27, 2014*

**physics**

a baseball is thrown from a mound .833ft above ground level ,to home plat 60.5 feet away. the ball is released horizontally from the pitcher with a velocity of 139ft/s when the pitchers hand is 5.3ft above the mound. a)how long will it take to reach home plate? b) how far did ...
*July 25, 2014*

**Biology/Science**

Which of the following processes produces haploid gametes? A. Meiosis B. Fertilization C. Mitosis D. Invagination I think A
*July 23, 2014*

**physics**

suppose that a 70.0kg box is pulled by a 400.N force at an angle of 30 degrees to the horizontal. the coefficient of sliding friction is 0.500. what is the acceleration of the box?
*July 23, 2014*

**Physics**

Consider an ideal gas enclosed within a container with a moveable piston and a valve through which additional ideal gas can be added to the container. Which one of the following actions may not result in an increase in pressure? Increase the temperature, the volume, and the ...
*July 20, 2014*

**Physics**

Would it be twice the initial pressure?
*July 20, 2014*

**Physics**

An ideal gas is contained within closed box behind a removable wall. The walls of the container are insulated, so that no heat may be transferred from the system. Initially, the gas has an initial pressure P and an initial temperature T. The gas is then allowed to freely ...
*July 20, 2014*

**Physics**

The drawing shows three cylinders that have the same length and cross-sectional areas, but each is made of different material. The cylinders are arranged in series, so that heat is conducted from the left toward the right. The temperatures at the interfaces between the ...
*July 20, 2014*

**Physics**

Three spheres are made from the same material, but each has a different size and temperature. The radii of spheres A, B, and C are 1.5R, R, and 1.25R, respectively. Which of the following choices gives the correct ranking of the spheres in order of least radiant energy emitted...
*July 20, 2014*

**Maths- calculus**

Two ships leave different ports A and B 100 miles apart at 0800 hours, each heading for the opposite port on reciprocal courses. Ship A steams at 20 knots and ship B at 15 knots. calculate: (a) What time are they first 45 miles apart? (b) What time they will pass, and how far ...
*July 9, 2014*

**calc**

I am just suppose to find the surface area. We are studying arc length
*July 6, 2014*

**calc**

Find the exact area of the surface obtained by rotating the curve about the x-axis. 9x = y2 + 36, 4 ≤ x ≤ 8 I keep on getting 4pi (3^(3/2) +1) so I tried to put the answer in that way and also 24.78pi But it is wrong
*July 6, 2014*

**science**

An object with mass 110 kg moved in outer space. When it was at location < 11, -35, -7 > its speed was 17.5 m/s. A single constant force < 230, 420, -230 > N acted on the object while the object moved to location < 16, -41, -13 > m. What is the speed of the ...
*July 6, 2014*

**Algebra**

How do I find x for this equation? I think I should get e^(something). Thanks in advance! 3x^2+4lnx+4=0
*July 3, 2014*

**physics**

The velocity of a ball changes from ‹ 8, −5, 0 › m/s to ‹ 7.88, −5.28, 0 › m/s in 0.04 s, due to the gravitational attraction of the Earth and to air resistance. The mass of the ball is 140 grams. I calculated the acceleration and got <-3,-7,...
*June 28, 2014*

**physics**

A 6 kg box with initial speed 5 m/s slides across the floor and comes to a stop after 1.4 s. a.What is the magnitude of the average net force on the box? b.You put a 3 kg block in the box, so the total mass is now 9 kg, and you launch this heavier box with an initial speed of ...
*June 28, 2014*

**calc**

nevermind! i just forgot the constant
*June 27, 2014*

**calc**

thanks. i wish i could upload a screen shot of what i typed it but i did it exactly as the site gave and it was counted wrong.
*June 27, 2014*

**calc**

integral: sqrt (16 + 6x − x^2) dx
*June 27, 2014*

**math**

what % of 100 is 150? what is the formula for doing this ? Thanks
*June 23, 2014*

**Intro to algebra**

Thank you Ms. Sue.
*June 12, 2014*

**Intro to algebra**

The ratio of the distances a pitching wedge and an 8-iron will drive a golf ball is 4 to 5. If a golfer averages 140 yards with a pitching wedge, how far should she average with an 8-iron?
*June 12, 2014*

**Keith**

The Information Systems Audit and Control Association surveyed office workers to learn about the anticipated usage of office computers for personal holiday shopping. Assume that the number of hours a worker spends doing holiday shopping on an office computer follows an ...
*June 11, 2014*

**Statistics**

The mean cost of domestic airfares in the United States rose to an all-time high of $385 per ticket. Airfares were based on the total ticket value, which consisted of the price charged by the airlines plus any additional taxes and fees. Assume domestic airfares are normally ...
*June 11, 2014*

**calc 1**

fine the slope intercept equation of the tangent line to the curve by the relation 5x^3+10y^2=8x^5+2y at points (1,1)
*June 11, 2014*

**Math**

find the derivative f(x)= (2^x-e^x)/(2^x+e^x)
*June 11, 2014*

**Math**

find the derivative F(x)=tan(ln(5x))
*June 11, 2014*

**physics**

he drawing shows a steel ball rolling along a flat surface at constant velocity from point A to point B. A magnet exerts an attractive force on the ball only for the short time that passes as the ball rolls past point B. Which one of the following trajectories does the ball ...
*June 8, 2014*

**physics**

Two satellites are orbiting the Earth in stable circular orbits. Satellite A has a mass m and is located at a distance 2r from the center of the Earth. Satellite B has a mass 2m and is located at a distance r from the center of the Earth. Which one of the following statements ...
*June 8, 2014*

**physics**

A box containing supplies is vertically lowered at constant speed by a rope from a hovering helicopter. Consider the following forces that arise in this situation: force 1: the force of the earth pulling on the box force 2: the tension force acting on the box force 3: the ...
*June 8, 2014*

**physics**

The drawing shows a steel ball rolling along a flat surface at constant velocity from point A to point B. A magnet exerts an attractive force on the ball only for the short time that passes as the ball rolls past point B. Which one of the following trajectories does the ball ...
*June 8, 2014*

**Physics**

A model airplane is flying in a horizontal circle with a constant speed. The initial radius of the circle is R. The boy holding the cord to which the airplane is attached, then decides to increase the length of the cord so that the radius of the circle increases to 2R. The ...
*June 8, 2014*

**Physics**

A model airplane is flying in a horizontal circle with a constant speed. The initial radius of the circle is R. The boy holding the cord to which the airplane is attached, then decides to increase the length of the cord so that the radius of the circle increases to 2R. The ...
*June 8, 2014*

**Math**

0.145258-0.145258x = x
*June 8, 2014*

**physics**

Gradually increase the angle of the incline, but keep the angle low enough that the block does not slide. Select all the phrases below that would make the following statement true: For this situation, as the angle is increased the maximum possible value of the force of static ...
*June 8, 2014*

**physics**

thank you! and the fourth statement?
*June 8, 2014*

**physics**

Joe pushes horizontally on a heavy box across a rough surface at constant speed. Which one of the following statements concerning this situation is false? If Joe stops pushing on the box, the box will stop sliding eventually. If Joe doubles his force on the box, the speed of ...
*June 8, 2014*

**Physics**

A ball is sitting in a child's wagon and a child is holding the wagon's handle. The ball then rolls to the back of the wagon without anyone touching the ball directly. Which of the following statements according to Newton's first law of motion could describe the ...
*June 8, 2014*

**statistics**

What are the differences between hypothesis testing regarding population means drawn from small and large samples
*June 5, 2014*

**civics **

Which of the following correctly describes an example of how climate affected the settlement in North America ? A. most of the United states settled in the Midwest, where temperatures are less extreme. B.Most of Canada's population lives along the southern border, where ...
*June 4, 2014*

**Physics**

i have a question on thin lens equation how do i know when di is positive or negative? also i have an example: A convex lens has a focal length of 60 cm. A candle is placed 50 cm from the lens. What type of image is formed and how far is the image from the lens? (Is my answer ...
*June 3, 2014*

**intro to computers**

A user calls the help desk and says she cannot install a Windows application on her Windows 8 computer because she is being denied. What is the most likely reason?
*May 31, 2014*

**Physics**

A 50kg mass and a 85kg mass are hung over a frictionless pulley what is the acceleration of the system
*May 26, 2014*

**social studies**

Thank you MS. Sue. There were 4 answers with 1 being incorrect and the other 3 checked out correct but I wasn't 100% sure of this one
*May 22, 2014*

**social studies**

Was the city of Constantinople named after the greek city Byzantium? Or was it just built on that former site with a new name?
*May 22, 2014*

**ELA**

is
*May 20, 2014*

**ELA**

Thank you for always helping
*May 20, 2014*

**ELA**

would it be true? voice is a noun right ?
*May 20, 2014*

**ELA**

That's what I thought. Thank you. In this sentence The Gecko is the only lizard with a true voice. Would the subject be Gecko and verb only ?
*May 20, 2014*

**ELA**

In the sentence Some only have two legs and some are legless. What would the subject and verb be ?
*May 20, 2014*

**Physics**

Calculate the equilibrium position of a third charge of 6.79 x 10^-9 C that is positioned between an 8 x 10^-9 C charge and a 12 x 10^-9 c charge.
*May 19, 2014*

**physics**

Calculate the gravity on a planet using a pendulum that has a period of 2.45 s having a length of 1.25 m.
*May 19, 2014*

**English**

What's a good introduction on this topic? Should the Canadian health-care system be privatized?
*May 19, 2014*

**irsc**

Complete the table to determine the balance A for $12,000 invested at rate r for t years, compounded continuously. (Round your answers to the nearest cent.) r = 1.5% find T1-1.2 T10-2.9 T20-8.4 T30-24.3 T40-70.4 T50-203.9
*May 19, 2014*

**Math**

In triangle RST, angle S is a right angle and cdc R=13/12. What is Tan T? answers: 13/5, 12/13, 12/5, 5/12
*May 19, 2014*

**Algebra 1**

-2x-2y=4 2y=-2x-4 Identify the solution
*May 15, 2014*

**physics**

I was able to do part 1 and part 2. I am stuck on Now you perform an X=(0110) measurement on the qubit at time 0. What is the expected value of your measurement? What if you perform the above measurement at time t=4π3 instead? What is the expected value of your measurement?
*May 15, 2014*

**physics**

Consider the observable M that corresponds to a measurement in the sign basis where the measurement value is 3 if the outcome is + and −2 if the outcome is −. Write M in the standard basis. If M is the Hamiltonian acting on a qubit which is in the state |ψ(0...
*May 15, 2014*

**math**

Valerie plays a game using the spinner shown. During the game she will spin a total of 36 times. Which is the best prediction for the number of times she will get either "lose a turn" or "back 3" on the spinner?
*May 14, 2014*

**math**

Which is the best prediction for the number of times the spinner will stop on white?
*May 14, 2014*

**math**

The table shows the results of a spinner with four colored sections. Use the table to answer the question. The spinner is spun 50 more times. Which is the best prediction for the number of times the spinner will stop on white?
*May 14, 2014*