Friday

September 30, 2016
Total # Posts: 4,928

**Physics**

A 27.9 kg block (m1) is on a horizontal surface, connected to a 5.3 kg block (m2) by a massless string. The pulley is massless and frictionless. A force of 239.3 N acts on m1 at an angle of 28.9°. The coefficient of kinetic friction between m1 and the surface is 0.181. ...

*October 20, 2014*

**Physics**

Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 700 N, and his speed at the bottom of the pole is 3.4 m/s. How far did he slide down the pole?

*October 19, 2014*

**Spanish Questions?**

For 16 I think you should just do some research on what the games are like then you can find out what's different. Just google Pan American and Olympic Games and look up information on Wikipedia for comparison. The answer to 17 is the theory of natural selection. Darwin ...

*October 17, 2014*

**Algebra**

Well if you look up Cowling's rule it states:fraction of the adult dose obtained by dividing the age of the child at the nearest birthday by 24 (source internet dictionary). So let's let the age of the child be represented by the variable x. so x/24 is the fraction of ...

*October 17, 2014*

**algebra 1**

I think you may have messed up on your signs a tad because you added 18 to both sides instead of subtracting it. 18-3w=4 +3w +3w -4 -4 You can add over the 3w to make it positive and subtract the four from the 18 like so 18-4=3w 18-4 simplifies to 14 so 14=3w now divide by 3 ...

*October 17, 2014*

**Physics**

A marble rolls off a lab table that is 0.92 m high. It rolls off the table with a velocity of 1.66 m/s. How far from the base of the table must the chip be placed so that the marble will hit the chip?

*October 17, 2014*

**Calculus**

Looks good

*October 17, 2014*

**S.S**

You can find the answers to these questions online just by googling them.

*October 17, 2014*

**Physics - Spring Gun**

A toy gun uses a spring to shoot a ball with a mass of 5.0 g. The spring is “loaded” by compressing it 5.0 cm and has a spring constant of 288 N/m. The end of the spring is at the end of the gun (the ball does not travel any distance inside the gun after the spring) ...

*October 13, 2014*

**Soil Science (PAW), HELP!!**

a) If the silty clay loam soil profile is 1 meter deep, how much plant available water (cm) can potentially be held in the upper meter of soil? b) If the silty clay loam profile is 40 inches deep, how many inches of plant available water can potentially be held in the upper 40...

*October 12, 2014*

**pre-calculus**

You are given a pair of equations, one representing a supply curve and the other representing a demand curve, where p is the unit price for x items. 80 p + x - 380 = 0 and 84 p - x - 40 = 0 a. Identify which is the supply curve and demand curve and the appropriate domain. Put ...

*October 10, 2014*

**College Science **

A chandelier is suspended by two identical, vertical chains side by side. The chandelier's mass is m = 5.3 kg. A. If the tension in one chain is represented by T, write an expression for this tension in terms of m and g, the gravitational acceleration on the Earth's ...

*October 9, 2014*

**physics**

a particle is moving in a straight line the particle starts with speed 5ms and accelerates at a constant rate of 2ms for 8s it then decelerates at a constant rate coming to rest in a further 12s find the total distance during 20s it is 230 but i dont understand how

*October 9, 2014*

**Physics**

A block of wood of mass 1.2kg initially at rest is free to slide on a horizontal surface. A bullet of mass 100g travelling at a speed of 780ms^-1 is fired horizontally at the block and becomes embedded in it. Calculate the speed the block and bullet move off at immediately ...

*October 8, 2014*

**Math**

840

*October 8, 2014*

**chemistry 112**

A volume of 60.0mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 19.2mL of 1.50 M H2SO4 was needed? The equation is 2KOH(aq)+H2SO4(aq)→K2SO4(aq)+2H2O(l) Express the ...

*October 7, 2014*

**Social Studies**

It is B Guys

*October 6, 2014*

**Algebra**

the points (1,4), (3,8) and (8,3) lie on the graph whose equation is of the form: y=a|x-b|+c where a,b and c are real numbers. find a,b and c.

*October 5, 2014*

**global studies**

Nobles

*October 5, 2014*

**physics**

The second part of the problem can be solved through the following method: Ki+Ui=Kf+Uf, which indicates that the inital KE+initial PE=final KE+ final PE. Because there is no inital KE or final PE, those values will both be zero. You are then left with just mgh=1/2 mv^2. You ...

*October 2, 2014*

**Biology**

What are some of the reasons why everyone does not have the same pulse rate at rest. I think is would be your age, weight,stress.. but i am not sure

*October 1, 2014*

**Biology**

A 50 year old male who is not overweight and has normal blood cholesterol levels suffers a heart attack. Propose a possible explanation i think the answer would be genetics...

*October 1, 2014*

**Chem (general)**

Thank you so much for the help Dr. Bob222! I was thinking there wouldn't be anything left since it was the limiting reactant but just wanted to make sure . Thanks again!!

*October 1, 2014*

**Chem (general)**

Little confused on how to get part B. A) if 3.00g of hydrosulfuric acid is reacted with 3.00g of silver nitrate, calculate the mass (in g) of solid silver sulfide formed. Which is the limiting reactant? (Hint: the other product is nitric acid). B) calculate the moles of EACH ...

*October 1, 2014*

**math**

write a ratio in 3 ways, comparing the first quantity to the second. A week has 5 school days and 2 weekends. Second question about 1 in 4 people swims at least 6 times each year.

*September 29, 2014*

**geometry**

Obtuse angle

*September 29, 2014*

**physics**

A bullet is fired straight up from a gun with a muzzle velocity of 214 m/s. Neglecting air resistance, what will be its displacement after 8.2 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m

*September 28, 2014*

**Science-HELP?**

thank you ms. sue and damon

*September 26, 2014*

**Science-HELP? **

A map of Florida is an example of a(n) ________. *I researched this a little bit and I thought it might be peninsula. Can someone verify this for me please? There aren't any choices either.

*September 26, 2014*

**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**

the answer is a

*September 24, 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**

i dont understand

*September 15, 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*