Thursday

March 26, 2015

March 26, 2015

Total # Posts: 4,319

**Physics**

Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 1.9-kg projectile from rest to a speed of 5.1 × 103 m/s. The net force accelerating the projectile is 8.6 × 105 N. ...
*September 25, 2014*

**Math**

Scores on a marketing exam are known to be normally distribute with mean and standard deviation of 60 and 20, respectively. The syllabus suggests that the top 15% of the students will get an A in the course. What is the minimum score required to get an A?
*September 25, 2014*

**Oceans**

(I think I'm supposed to use residence time?) About 30,000 years ago, during the last glacial maximum, glaciers and ice sheets stored enough water to decrease the sea level by 120 m. Presently, there are about 3.05x106 km3 of ice contained within the Greenland glacial ...
*September 25, 2014*

**SAT Math **

A student states that for any positive integer n is the sum of n successive integers is always divisible by n. Which of the following can be used to disprove the student's statement? Please provide answer and how you got it! A) 1+2=3 B) 1+2+3=2x3 C) 1+2+3+4+5=3x5 D) p+(p+1...
*September 24, 2014*

**math**

John can build 7 birdhouses in 5 hours, write an equation that will allow john to calculate the time it will take to build any given number of houses. HOW MANY HOUSES in 40 hours? #2 How long will it take to build 35 houses?
*September 24, 2014*

**math**

Thank you, once again.
*September 23, 2014*

**math**

A recipe for fruit salad serves 4 people. It calls for 2 oranges and 16 grapes. You want to serve 10 people. How many oranges and how many grapes will you need?
*September 23, 2014*

**Math**

Solve the given quadratic equation exactly using the quadratic formula. Write the solutions in its simplest form. Using a calculator, determine all irrational solutions to the nearest thousandth. Separate the solutions with a comma and list the smaller one first. For the ...
*September 23, 2014*

**Chemistry**

How many grams of sodium carbonate are in a sodium carbonate sample that contains 1.773x10^17 carbon atoms? How do I work this out?
*September 22, 2014*

**Chemistry**

How many protons are contained in a circular puddle of mercury that is 8.5 inches wide and .25 inches deep?
*September 22, 2014*

**science**

THANK YOU MS. SUE
*September 22, 2014*

**science**

what is another path that a scientist might follow using the data from an experiment that did not support the hypothesis .
*September 22, 2014*

**college physics**

A 52.2 kg parachutist lands moving straight downward with a speed of 3.75 m/s. If the parachutist comes to rest with constant acceleration over a distance of 0.794 m, what force does the ground exert on her?
*September 22, 2014*

**Math-HElP PLEASE??**

On a certain hot summer's day, 300 people used the public swimming pool. The daily prices are $1.75 for children and $2.25 for adults. The recipients for admissions totaled $613.50. How many children and how many adults swam at the public pool that day? There were ___ ...
*September 21, 2014*

**chemistry**

Calculate the volume in liters of a M copper(II) sulfate solution that contains of copper(II) sulfate . Round your answer to significant digits.
*September 21, 2014*

**math**

Bananas are $0.59/pound. What is the constant of proportionality?
*September 19, 2014*

**Math**

A is correct in my condition
*September 18, 2014*

**math**

Line through (0,b) and (10,-5) is perpendicular to the line through (a,0) and (-6,-3). If all ordered pairs (a,b) which make the first sentence of this problem true are graphed, they all lie on a line. Find the equation of this line.
*September 17, 2014*

**Math**

THANK YOU DAMON VERY MUCH, YOU WERE VERY HELPFUL :)
*September 16, 2014*

**Math**

A number and its absolute value are equal. if you subtract 2 from the number, the new number and its absolute value are not equal.What do you do about the number?What is possible number that satisfies these conditions?
*September 16, 2014*

**Math-PLEASE help me**

Ohhhh, ok. I understand now. Thank you Mia so much! You've been most helpful. :D Goodnight.
*September 15, 2014*

**Math-PLEASE help me**

I was just about to reply and tell you that I subtracted when I was suppose to add but you replied first. :P So when I added them together I got 0. But you said my math was correct. I'm confused. >_<
*September 15, 2014*

**Math-PLEASE help me**

ok, so i drew a number line and the distance I got was -5.56. Is this correct?
*September 15, 2014*

**Math-PLEASE help me**

If the absolute value of a negative number is 2.78, what is the distance on the number line between the number and its absolute value? Explain your answer.
*September 15, 2014*

**French**

Yes, always. & no problem. :)
*September 15, 2014*

**French**

I don't see why it wouldn't be acceptable. It's an informal letter, not a business letter. if it was a formal letter you would say, " Bonjour Madame *insert name here*! But with an informal letter, it should be okay to exclude a name.
*September 15, 2014*

**Math**

If the absolute value of a negative number is 2.78, what is the distance on the number line between the number and its absolute value? Explain your answer. **I think it would be 2.78 because isn't the absolute value the distance from zero? So wouldn't it be the same? I...
*September 15, 2014*

**math**

THANK YOU SO MUCH, FOR ALL YOUR HELP. I get it know.
*September 15, 2014*

**math**

how would you get what x and k would equal?
*September 15, 2014*

**math**

find the values of the variables 32 40 96 120 112 x 144 180 k 230 how do you do this? what is the formula? Thank you
*September 15, 2014*

**physics**

A helicopter weighs 3920 newtons, caculated the force on it if it is ascending up at a rate of 2m/s squre ,what wil b force on helicopter if it is moving up with the constant speed of 4m/s .
*September 15, 2014*

**Algebra help. ms. sue, steve**

is it true?
*September 12, 2014*

**Algebra**

is it true or false?
*September 12, 2014*

**Algebra **

For all real numbers a and b, 2a • b = a^2 + b^2
*September 12, 2014*

**Math-PLEASE check my answers**

Ok, thank you Ms. Sue, once again! :)
*September 11, 2014*

**Math-PLEASE check my answers**

What types of problems can be solved using the greatest common factor? What types of problems can be solved using the least common multiple? Complete the explanation. *** Use the words 'same' and 'different' to complete the following sentences.*** Problems in ...
*September 11, 2014*

**Math**

CAN SOMEONE CHECK MY ANSWERS PLEASE? What types of problems can be solved using the greatest common factor? What types of problems can be solved using the least common multiple? Complete the explanation. *** Use the words 'same' and 'different' to complete the ...
*September 11, 2014*

**Math**

Zero is greater than negative 2? Yes.
*September 10, 2014*

**Math**

Enter the sum of numbers as a product of their GCF. 27 + 36 The sum of the numbers as a product of their GCF is ____ * (____ +_____).
*September 10, 2014*

**math**

Enter the sum of numbers as a product of their GCF. 27 + 36 The sum of the numbers as a product of their GCF is ____ * (____ +_____).
*September 10, 2014*

**math**

Juanita runs every seventh day and swims every fifth day. If Juanita runs and swims today, in how many days will she run and swim again on the same day? She will run and swim again in ____ days.
*September 10, 2014*

**math**

ok, thank you so much!! :)
*September 10, 2014*

**math**

Juanita runs every seventh day and swims every fifth day. If Juanita runs and swims today, in how many days will she run and swim again on the same day?
*September 10, 2014*

**math**

Find the unit rate. Run 400 meters in 1 min 32 s. Have no idea, please help.
*September 10, 2014*

**government**

Which statement BEST describes the philosophy of Sir Robert Filmer? A. Kings derive their power from the consent of their subjects. B. Kings have a divine right to absolute authority over their subjects. C. Government’s principle duty is to protect the individual rights ...
*September 8, 2014*

**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*

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