# Posts by john

Total # Posts: 8,330

**Chemistry**

How many grams of iron at 200.0 c must be placed in 200.0 g of water at 18.0 c so that the temp of both will be 30.0 c ? Okay so the SH of iron = .106 This is what I have set up.. Not sure if I'm going at this the right way.. (.106) (m) (170.0) = (1.0) (200.0) (12.0) I don...

**English**

What is the archetype in By the Waters Of Babylon for The Quest to Know who you are, with an example from the book

**algebra**

Solve y=kx for k

**Georgia History**

thank you

**Georgia History**

which of the following immigrant group came to Georgia unwillingly. A.Quakers B.Scots-Irish C.slaves D.Puritans I think C

**PROBABILITY PLEASE HELP**

A tourist bureau survey showed that 80% of those who seek information about the state actually come to visit. The office received 7 request for information. What is the probability that all will visit? What is the probability that at least one will? I've tried to figure ...

**physics**

A 0.19 kg hockey puck has a velocity of 2.1 m/s toward the east (the +x direction) as it slides over the frictionless surface of an ice hockey rink. What are the (a) magnitude and (b) direction of the constant net force that must act on the puck during a 0.36 s time interval ...

**Waka sss**

The oxidation number of sulphur in CUSO4.5H2O IS

**science**

what is the half-life of the nuclide

**Chemistry**

When 0.100 g of calcium oxide is added to 125 g of water at 23.6°C in a coffee cup calorimeter, this reaction occurs: CaO (s) + H2O(l) -> Ca(OH)2 (aq) ∆H = -81.9kJ/mol If the specific heat capacity of water is 4.184 J g-1 °C-1, what is the final temperature of...

**algebra**

solve the system by substitution x+y=9000 .06x+.15y=1215 .06x+.15(x-9000)=1215 .06x+.15x-1350=1215 .21x-1350=1215 x-1350+1214.79 x+2564.79 don't look right? where did I go wrong

**Physics**

A rifle bullet, traveling at "v1" strikes a large tree an penetrates to a depth of "d". the mass of the bullet is "m". assume the de-acceleration is constant as it penetrates the tree. a) the time required to stop. b) the de-acceleration of the ...

**physics**

if two forces 10N and 20N are inclined at angle 60degree to each other. Find the resultant force.

**programming ,object oriented**

The Parasol Insurance Group sells a variety of insurance policy types. Design a flowchart for a program that accepts a client’s name and “Y’ or “N’ string answers to questions about whether the client wants each of the following policy types: ...

**Algebra**

A phone company offers two monthly charge plans. In Plan A, the customer pays a monthly fee of $5 and then an additional 4 cents per minute of use. In Plan B, there is no monthly fee, but the customer pays 6 cents per minute of use. For what amounts of monthly phone use will ...

**preschool**

They don't really know. They just do.

**english**

thank you Reed. For question #2, is it B? Wearing a warm coat, I walked to the store.

**english**

My favorite hobby in high school was showing horses in community horse shows. Which of the following is the simple subject? a. High school b. Horses c. Shows d. Hobby i think the answer is d.) hobby 2. Which of the following sentences is written correctly? a. I found the shoe ...

**ohs**

Sara is six years older than Ben. Five years ago, Sara was one and a half times ad old ad Ben. What is Sara's current age? How did the teacher come up with Sara's current age of 23? I have no idea

**Math(HELP!!!) PLEASE**

How would you convert 1.5 square iles to dm^2?? I don't know how to show my work for this particular one.

**Math (GOT IT!)**

I think I got it I went from cm^3 to L to gal to qts to pints and multiplied then divide from there.

**Math**

I'm not sure how to arrive at my answer. Convert 1.745 * 10 ^-5 m^3 to pints How would you show the work for that because my conversion are wrong.

**Math (vector addition)**

A bridge member is exerting a force of 500lbs on a joint. The member is connected to the bridge at an angle of 50 degrees. Calculate the x and y components.

**Math (vector addition)**

A plane is traveling toward the southwest at 200 km/h. Calculate the westward and southward components of the velocity.

**Biology**

What is the phase where chromatin condenses to form chromosomes

**Math**

What is 7,560 in scientific notation

**Algebra**

Working together, Sandy and Carol can pack a storage unit in 4 hours. If they work alone, it takes Sandy 6 hours longer than it takes Carol. How long would it take Carol to pack the storage unit alone?

**physics**

Convert the resultant vector into its x and y components. 225 N at 12 degrees A.(222.3 N, 37.4 N) B(201.1 N, 10.8 N) C.(45.8 N, 201.1 N) D.(220.1 N, 46.8 N)

**physics**

When a 0.106 kg mass is suspended at rest from a certain spring, the spring stretches 3.50 cm. Find the instantaneous acceleration of the mass when it is raised 5.20 cm, compressing the spring 1.70 cm.

**American History**

Throughout the 17th and 18th centuries the colonists underwent a gradual transformation---they became less Anglo-American and more uniquely American. Discuss four elements responsible for this slow metamorphosis. (To merely list the elements is not enough, you must show how ...

**P6 maths**

At a concert, tickets were sold at $12 , $30 and $50. The sales of $12 tickets made up 25% of the total amout of money collected. The sales of $30 tickets made up of 60% of the total amount . Given that 5 more $12 tickets were sold than the $30 tickets , how many $50 tickets ...

**P6 maths**

Thank you!

**P6 maths**

Mrs Wong baked some pizzas for her students. The boy received twice as many pizzas as the girls. There were as many girls as boys in the class. Each girl ate 4/9 of a pizza and they finished all pizzas that were given to them. Each bot ate 3/4 of a pizza and they had 3 3/4 ...

**math**

Hello. I will clarify it a little better. 11/14 rosebuds either bloomed today or will bloom. 2/5 of 11/14 (2/5*11/4) is 22/70. Then, 3/14 (bloomed yesterday) = 15/70. Then add 15/70+22/70. You get 37/70. This means that 33/70 = 66 rosebuds not bloomed yet. Then, divide 33/70 ...

**Chemistry**

i don't get what atmospheric is supposed to mean, i under stand at room temp, but not atmospheric. i don't know the answers.

**Chemistry**

what is the following's states at atmospheric temperature? 1. diamond 2. mercury 3. oxygen 4. clay 5 cooking oil 6. neon

**Math**

So 10.25=0.05n+0.1d+0.25q n=3d q=4*d+1 Substitute d and q to the top equation So 10.25=0.05(3d)+0.1d+0.25(4*d+1) Distribute 10.25=0.15d+0.1d+1d+0.25 Simplify 10.25=1.25d+0.25 10.25-0.25=1.25d --> 10/1.25=d--> d=8 plug 8 back into the equations 3*8=n --> n=24 4*8+1=q...

**Algebra 2**

Can someone help me simplify this exponential expression? (a-4)/(a^6) The answer I got was (a^5)- 4/a^6. Is this correct and if not where did I go wrong?

**Chemistry**

How many grams of rust are produced from the oxidation of 10.0 lb of iron?

**Chemistry**

would it be 10? since it takes double the amount of Fe to make rust. 5.0g of rust is .0313 moles, you would multiply it by 2?

**Chemistry**

How many grams of iron must be oxidized to produce 5.0g of rust? (Fe2O3) I have no idea how to solve this!

**Math**

Romain,fabien,lise,jen and adrien stand in a single row.romain is after lise.fabien is before romain and just after jennifer.jennifer is before lise but she is not d first.where iS adrien?

**algebra**

.879

**math**

1.4 divided by 36.96

**math/science**

t = 0 in 1982 t = 8 in 1990 that is 8 years later. C = 3440 *(3/4)^0 = 3440 C = 3340 * (3/4)^8 = _____ Take the ratio of the ans for 1990 divided by the ans for 1985

**Psychology**

The indep. variable is the drug and it has 3 levels - placebo, 10 mg and 20 mg. the response to the drug is the dependent variable because the values are dependent on the amount of drug given.

**math**

x = amount at 14% y = amount at 8% x + y =60000 .14x + .08y = 6780 Most people will multiply the second equation by 100 to get rid of the decimals. x + y = 60000 14x + 8y = 67800 if you eliminate the y's you will be left with x = the value invested at 14% Multiply the top ...

**math/science**

divide the surface area of land by earth 5.73/1.97 10^7/10^8 2.91 x 10^-1 = .291

**Math**

think about 6 divided by ____ = 2 How would you solve this problem? divide 6 by 2 to get 3 It is true that 6 divided by 3 = 2 do the same thing here- -1/2 divided by -7/3 Instead of dividing fractions we multiply by the reciprocal -1/2 times -3/7 Multiply the numerators and ...

**physics**

Distance = rate x time 21.8 min /60 min/hour = ___ hours 13.1 min/60 Min/hr = ___ hours After converting all times to hours, multiply those times b the speed given in km/hr Of course lunch and buying gas gets multiplied by zero because you are stopped. Sum all of your other ...

**Geology**

formula for rate of change is like the slope formula from math. It is rise/run which is vertical distance/horizontal distance

**Neuroscience**

I'm struggling with the following question: The opening of chloride selective channels by a neurotransmitter X will drive membrane potential toward the chloride equilibrium potential. Assume that early during cell development, Cl is pumped into the cell for a concentration...

**Physics**

acceleration = 17m/s^2 take the anti derivative twice to get distance P = 17/2t^2 + Ct + D We know its at rest so it has no initial velocity, C = 0 and you can calculate it relative to a null position D = 0 Thus P = (17/2)t^2 plug in time of 11s

**algebra**

Lauren wants to purchase custom-made bumper stickers to advertise her business. Two websites offer different deals: Website A: Pay a fee of $80.00, plus $0.35 per bumper sticker or Website B: Pay a fee of $49.25, plus $0.50 per bumper sticker Website B is the cheaper option if...

**Math**

Romain,fabien,lise,jen and adrien stand in a single row.romain is after lise.fabien is before romain and just after jennifer.jennifer is before lise but she is not d first.where iS adrien?

**Math**

How many digits are needed to write down all from 1-100?

**math**

The number of digits used to write all the page in a book is 35. How many pages has the book?

**algebra**

Algebra-Ms.Sue that isn't a answer choice

**Physics- Relativity**

A lighthouse sweeps its beam of light around in a circle once every 7.2 s. To an observer in a spaceship moving away from Earth, the beam of light completes one full circle every 9 s. What is the speed of the spaceship relative to Earth

**finite**

20P0=

**finite**

suppose that 2 cards are randomly selected from a standard 52 card deck. A) whats the probability the first card is a club and the second is a club if the sampling is done without replacement? B) if both cards are clubs but it is done with replacement?

**finite math**

Among 26 to 31 year olds 35% say they have driven a car while under the influence of peer pressure. suppose 2 26 to 31 year olds are selected at random. A)the probability that at least 1 has not driven under the influence? B)the probability that at least 1 of the 2 adults has ...

**problem solving**

for a parallel structure of identical components, the system can succeed if at least 1 of the components succeeds. Assume that components fail independently of each other and that each component has a 0.19 probability of failure. A) unusual to see 1 component fail? B) unusual ...

**finite**

The probability that a randomly selected 2 year old feral cat will live to be 3 years old is 0.73877. A) what is the probability that 2 randomly selected 2 year old cats will live to be 3? B) what is the probability that 7 will live to be 3?

**baseball**

A baseball player hit 59 home runs in a season. Of the 59 home runs 18 went to right field, 16 went to right center, 8 went to center field, 12 went to left center field, and 5 went to left field. A) What is the probability that a randomly selected home run was hit to left ...

**statistics**

According to a certain country's department of education 39.6% of 3-year olds are enrolled in day care. What is the probability that a randomly selected 3-year old is enrolled in day care?

**stats**

Suppose you toss a coin 100 times and get 82 heads and 18 tails. Based on these results, what is the probability the next flip will be a tails?

**Chemistry**

For the combustion of 100. gm of methane, how much heat would be generated?

**chemistry**

It took 20 seconds for a certain volume of oxygen to effuse through an orifice(small opening) at 298K. How long will it take the same volume of each of the following gases to effuse through the same orifice at the same temperature?. The gases are hydrogen, helium, and chlorine...

**Algebra**

A

**calculus**

a colony of bacteria living on a petri dish under optimal conditions doubles in size every ten minutes. At noon on a certain day, the Petri dish completely covered with bacteria. At what times (to the nearest hour, minute and second) was the percentage of the plate covered by ...

**finite**

the probability that a randomly selected 4 year old male feral cat will live to be 5 years old is 0.87886. (a)what is the probability that two randomly selected male 4 yr old cats will live to be 5.(b) what is the probability that six randomly selected male cats will live to ...

**Science**

You have 75.0 mL of a 2.50 M solution of Na2CrO4 (aq). You also have 125 mL of a 2.15 M solution of AgNO3 (aq). Calculate the concentration of NO3 when the two solutions are added together.

**Geometry**

how do you solve this step by step im stuck

**Quadratics/ Algebra**

a fraction is such that the numerator is seven less than the square of the denominator. if six is added to the numerator and on to the denominator the result is 2. Find the fraction

**le**

a fraction is such that the numerator is seven less than the square of the denominator. if six is added to the numerator and on to the denominator the result is 2. Find the fraction

**english**

idea

**Algebra**

Factor completely: X^3n+y^3n Do I factor it as a cube? Can't figure it out

**Entrepreneurs**

If switching to fast replenishment compared to holding inventory in a dc (distribution center). Is this: Operational? Tactical? or Strategic?

**Chemistry**

I read that site before coming here, I still didn't understand it

**Chemistry**

Can someone explain to me what an intermediate product is and give me and example?

**algebra**

Find the dimensions of the rectangle meeting the specified conditions

**algebra**

The perimeter is 38.8 millimeters and the length is 2.4 times the width. (Round your answers to one decimal place.

**computer programming**

Boardman College maintains two files—one for Sociology majors and another for Anthropology majors. Each file contains students' ID numbers, last names, first names, and grade point averages. Each file is in student ID number order. The college is merging the two ...

**Physics**

so i need to calculate the moment of inertia of the pulley and the angular acceleration of the pulley. mass A = 9kg Mass B = 15kg Inner pulley= Mass 3kg R= 6cm Outerpulley= mass 7kg R=12cm both are disks glued together. it is a composite pulley with two masses hanging. Mass A ...

**Physic**

so i need to calculate the moment of inertia of the pulley and the angular acceleration of the pulley. mass A = 9kg Mass B = 15kg Inner pulley= Mass 3kg R= 6cm Outerpulley= mass 7kg R=12cm it is a composite pulley with two masses hanging. Mass A on the outer pulley held by a ...

**Statistics**

Suppose a multiple-choice test has 10 questions each with 5 choices. If a student guesses randomly. What is the probability that they get an B or better. ( they get at least a 80% on the exam) make sure to declare a binomial random variable and show all work

**life science**

Investigation to determine whether expired air contains carbon dioxide how should state the method,step by step for the experiment

**informatic**

Flow chart

**Chem**

At 1 atm, how much energy is required to heat 37.0g of H2O at -24.0 C to H2O at 155.0 C?

**History**

27

**History**

How many amendments were originally proposed and submitted to Congress as the initial draft of the Bill of Rights? • A. 12 B. 8 C. 15 D. 10 what will be the answer

**History**

Under most domestic search warrants what legal standard must be established before a warrant will be issued? A. Reasonable suspicion B. Reasonable cause C. Certiorari D. Probable cause any one sure of the answer

**Calculus**

Can someone explain how cos(X)/ square root (sin (X)) is 2 square root sin(x) +c Thanks!

**Geometry**

Determine whether a tangent line is shown in the diagram, for AB = 7, OB = 3.75, and AO = 8. Explain your reasoning. (The figure is not drawn to scale.)

**math**

10 23/99 I do this by taking the 23/100 and subtracting 1 from the denominator to get 23/99. If you had 10.33333 I would put 3/10 minus 1 from denominator to get 3/9 or 1/3.

**physics**

A student is thrown in a lake by his teacher, the student has a mass of 70 kg and a volume of 80,000 cm^3. Would the student sink or float? What is the net force on the student? What is the density of an object that has a mass of 2000 kg and a volume of 1.5 m^3? Would it sink ...

**physics**

A picture hangs on the wall suspended by two strings, as shown in the figure, with θ = 65°. The tension in string 1 is 1.3 N. (a)Is the tension in string 2 greater than, less than, or equal to the tension in string 1? Explain. (b) Verify your answer to part (a) by ...

**physics**

A baseball player slides into third base with an initial speed of 7.75 m/s. If the coefficient of kinetic friction between the player and the ground is 0.45, how far does the player slide before coming to rest?

**physics**

A 320 N bench is 2.40m long. The legs are .30m from each end and weigh 15.0 N each. If 3 persons weighing in order ,500 N, 750N, and 1000N sit .40m, 1.20m, and 2m respectively from one end of the bench, what downward force must each set of legs exert on the floor?