Posts by James

Total # Posts: 2,545

math
Is this about a triangle or what?

Chemistry (buffers)
Say, for example, that you had prepared a Buffer C, in which you mixed 8.203 g of sodium acetate, NaC2H3O2, with 100.0 mL of 1.0 M acetic acid. a. What would be the initial pH of Buffer C? HOW???????

math
Write the expression as a logarithm of a single quantity. (4marks) A)3log5a + 4log5b - 2log5c B)3log2 -1/3log(x^2-1)

math
Find the value of each of the following. Leave your answers as fractions where appropriate. Do not change bases. a) log4 (1/8) B)10^(-10log3)<---superscript in brackets c.2log3<-----subscript.9 d.log3<---subscript.3^2x

maths
In slope intercept form as you increase one value of S, T increases by two so the formula can be T=2S+5

math
The length of time that it takes for a pendulum to make one complete swing depends on the length of the pendulum. The time in seconds, T, is related to the length in metres, L, through the equation T=2π√ L/9.8 State the domain and range of this function. (1 mark) ...

math
The length of time that it takes for a pendulum to make one complete swing depends on the length of the pendulum. The time in seconds, T, is related to the length in metres, L, through the equation T=2π√ L/9.8 Write this equation in function notation. (1 mark) State...

Calculus; Limits
The percentage of research articles in a prominent journal written by researchers in the United States can be modeled by A(t) = 26 + (36/1 + 0.8(0.8)^−t'), where t is time in years (t = 0 represents 1983). Numerically estimate lim as t→+infinity A(t). I ...

Math
This problem pertains to Cuisenaire Rods: 1-white 2-red 3-green 4-purple 5-yellow 6-dark green 7-black 8-brown 9-blue 10-orange Question: (a) If an all-brown train is equal in length to an all-orange train, what can be said about the number of brown rods compared to the number...

Networking
I wanted to know if the MAC address is needed to be changed and does the ip address need to change if I move my computer from my home and into my office at work which are not on the same network?

Chemistry
I'm not sure what it's asking. I know I need to write out the aqueous parts and write the charges, but I don't how to do that. Mostly I need help getting it to the Gross Equation.

Chemistry
Yep

Chemistry
Write the Gross and Net Ionic Equations for the following Reactions: LiNO3(aq)+(NH4)3N(aq) => Li3N(s)+ NH4NO3(aq) Al(s)+CuCl2(aq) => AlCl3(aq)+Cu(s)

Physis
A bullet of mass of 30g and travelling at a speed of 200msˉ¹ embeds itself in a wooden block. The bullet penetrates a distance of 12cm into the wood. Using the concepts of work done by a force and kinetic energy, determine the average resistive force acting on the ...

they changed the answers on penn foster

how do you write a fraction as a decimal?

i got it now thanks. its 55/100 12/100 60/100 5/10 75/100

.25 .75 .3 .5 .40 .60 .08 .12 .55 those are the ones I need help on

i still don't geit

how do you write a fraction for a decimal?

science
A 5kg object is resting on top of a 30m building. How much energy does the object have?

Chemistry
I can't figure out a clear way to write out the formatting of the question, but here is a picture. Any help is greatly appreciated. the image is on the website imggur and then then after imgur dot com its /Cus8o

Chemistry
The following reaction exhibits the rate law: Rate = k[NO2]^2[Cl2]. 2NO(g)+Cl2(g)---->2NOCl (g) (a) Explain why the following mechanism is not plausible for this reaction. Fast: NO + Cl2<-->NOCl + Cl Slow: NO + Cl---->NOCl (b) Propose a two-step mechanism involving...

Microbiology
What if you found gas in the Lab tubes but none in the BGLB thow does this affect the EC test

math
a textbook has 50 more than two times the number of pages as a workbook. combined, they have 230 pages. how many pages are in the textbook?

geometry
a ladder is placed against the side of a building at an angle of 50 degree. the ladder's base is 10ft away from the base of the building. How long is the ladder?

Physics
A spring is mounted horizontally. A crate which has a mass of 8.5kg is pressed against the spring with a force of 350N. As a result the spring is compressed a distance of 82.0cm. The mass is then released and is allowed to slide along the horizontal, frictionless surface. What...

math
Gemma is making necklaces. She needs 10 beads for each one. She has 64 beads altogether. how many necklaces can she make?

physics work and energy
A mass of 45kg is sitting at the bottom of an incline plane which is 5.5m long has a coefficient of friction of .65 and which meets the horizontal at an angle of 32deg. A force of 812N is applied to the mass so as to accelerate the mass up the inclined plane. What will be the ...

THERMOCHEMISTRY
An ice hotel that is made of 410 metric tons of ice and 12200 metric tons of snow is being melted. The company is going to siphon the melted water into nearby streams. The company is using large industrial sized acethylene to do the job. Your job is to order the rigth amount ...

calculus
A 33 by 33 square piece of cardboard is to be made into a box by cutting out equal square corners from each side of the square. What size corners should be cut out so that the volume of the box is maximized?

Chemistry
Ok thank-you anyway. I appreciate it.

Chemistry
Look up the solubility of NaCl in both water and ethanol (in the CRC handbook of chemistry which i don't have access to, and any help would be appreciated) Consider the dissolution process, and competing intermolecular forces to account for the observed differences in ...

Chemistry
Look up the solubility of NaCl in both water and ethanol (in the CRC handbook of chemistry which i don't have access to, and any help would be appreciated) Consider the dissolution process, and competing intermolecular forces to account for the observed differences in ...

Chemistry
Acetic acid is a polar molecule and can form hydrogen bonds with water molecules. Therefore, it has high solubility in water. Yet acetic acid is also soluble in benzene (C6H6), a nonpolar solvent that lacks the ability to form hydrogen bonds. A solution of 3.8g of CH3COOH in ...

Chemistry
Hydrogen gas dissolves in palladium with the hydrogen molecules going into the spaces between the metal ions. Determine the molarity, molality, and percent by mass of the H2:Pd solution (d=10.8g/cm)containing 0.94g hydrogen gas dissolved in 215 grams of palladium metal.

Chemistry
THANK YOU!

Chemistry
I am lost about where to start on this. "The idea comes to mind to put some hot rocks in your frozen bath water. What mass of rocks at 220 degrees Celsius needs to be added to 500.0L of frozen bath water at 0 degrees celsius to raise its temperature to 55 degrees celsius...

math
The length of time that it takes for a pendulum to make one complete swing depends on the length of the pendulum. The time in seconds, T, is related to the length in metres, L, through the equation T=2π√ L/9.8

math
A student was given the function f(x) = x2 and asked to write the result of translating this function 1 unit to the left. The student wrote the following: g(x) = (x+1)2. Is this statement correct? Explain.

math
my x and y are in ml not liters..

math
??I got this when I followed steve's steps... optimal solution: c=191/23; x=2750/23; y=3000/23; z=0

AP English Literature
Thank you so much. I really appreciate it.

AP English Literature
E) synecdoche is that the correct answer?

AP English Literature
Can someone please help me? In Jane Eyre in chapter 1 with the quote, "every nerve I had feared him; and every morsel of flesh on my bones shrank when he came near," all the literary devices illustrate all of the following EXCEPT A) parallelism, B) hyperbole C) ...

AP English Literature
"every nerve I had feared him; and every morsel of flesh on my bones shrank when he came near," uses all of the literary devices EXCEPT A) parallelism, B) hyperbole, C) paradox, D) personification, E) synecdoche

MATH
If 2 angles are adjacent, can it also be said they form a linear pair? Why?

physics
If the magnitude of the electric field in air exceeds roughly 3 106 N/C, the air breaks down and a spark forms. For a two-disk capacitor of radius 49 cm with a gap of 1 mm, what is the maximum charge (plus and minus) that can be placed on the disks without a spark forming (...

physics
a spherical gaussian surface of rdius R surrounds a point charge of magnitude +Q. How does the flux through the spherical surface change if the sign of the charge is reversed and the Gaussian sphere is doubled?

GEOMETRY
Is it true that vertical angles must be oriented north-south?

math
john brought a new aquarium. How many gallons of water will john need to fill the tank three quarters of the way full? the tank is 12 inches tall and 19.25 long [1 gallon = 231 cubic inches] the tank is square

chemistry
How many electrons are in the highest occupied energy level of these atoms? Na(sodium) Al (aluminum) F(fluorine) C(carbon)

Physics
if the tangential speed of a ball is 1.2874 . what is the centripetal force ? If the maximum tension the rope can withstand before breaking is 159.9 N, what is the maximum tangential speed the ball can have? Answer in units of m/s

BIOLOGY
Predict which would diffuse faster, briefly explain why. a. Methylene blue or KMnO4 with the same concentration b. 1.0M vs 0.1 M methylene blue solution c. KMnO4 at 0oC and 100oC

Geometry
If x<15, then 5x <75 name the property of inequality

Physics
A hot-air balloon is rising upward with a constant speed of 2.50 m/s. When the balloon is 3.00 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

Math- Algebra
Write the expression in math symbols: the sum of m squared and 8

General Physics Pt.2
A current loop with radius 20 cm and current 2 A is in a uniform magnetic field of 0.5 T. Considering all possible orientations of the loop relative to the field, what is the largest potential energy difference (in Joules) you can find between two orientations?

prealgebra
between which w consecutive numbers would you find the square root of 82

Trigonometry
Find the remaining trigonometric ratios of θ if sin(θ) is given and θ QI sin(θ)=7/sqrt 149 cos= tan= cot= csc= sec=

physics
How much power is required to do 110 J of work on an object in a time of 0.4 s? W How much power is required if the same work is done in 5 s? W

Science
Assuming energy is conserved, gravitational potential energy and kinetic energy 'swap' during a fall, and the numeric values transfer. I would say the answer is 180 - 135 = 45J Kinetic energy = 45J

algebra
The length of a rectangle is 5 inches longer than its width. Its perimeter is 45 inches. Let w equal the width of the rectangle. Write an expression for the length in terms of the width. Use expressions for the length and width to write an equation for the perimeter, on the ...

psy/300
How does sensation and perception affect learning?

physics
find the apparent weight of a 18 cm by 12 cm by 6 cm block of concrete with a mass of 1.82 kg that is submerged under water.

physics 2014
An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 750 m, horizontal distance 19.8 km, and 23.0° south of west. The second aircraft is at altitude 1300 m, horizontal distance 17.8 km, and 18.0° south of west. What is the ...

Mathematics
A shopkeeper mixed coffee powder worth \$2.50 per kg with coffee powder worth \$3.50 per kg, and sold 20 kg of the mixture at \$2.80 per kg. Find the weights of the 2 grades of coffee powder that he mixed together. Explain clearly your steps of solving it.

psy/300
how does sensation and perception affect learning?

algebra
Thanks so much for your help!!

algebra
if one bus stops at the library every 60 minutes, and the other bus stops at the library every 45 minutes, how long will it take for both buses to be at the library at the same time?

math
Bob sets two alarm clocks (battery-powered) to be sure he arises for his Monday 8:00 A.M. accounting exam. There is a 75 percent chance that either clock will wake Bob. (a) What is the probability that Bob will oversleep? (b) If Bob had three clocks, would he have a 99 percent...

Math
Given P(A) = .70, P(B) = .30, and P(A ∩ B) = .00, find (a) P(A ∪ B) and (b) P(A | B). (c) Sketch a Venn diagram and describe it in words

Math
Solve for x: 5x−5>10x+6

Math
It took mike 2 2/5 hours to drive home. His sister drove same distance in 3/8 of mikes time how long did the drive take mikes sister?

Math
It took mike 2 2/5 hours to drive home. His sister drove same distance in 3/8 of mikes time how long did the drive take mikes sister?

Math
Thanks

Math
Put these numbers from least to greatest. -21, 60, -62, 9

algebra
WHAT DO YOU CALL A DUCK THAT STEALS?

pre calculus
Use properties of logarithms to find the exact value of the expression log_7 (343 * 7^15)

pre calculus
Thank you!

pre calculus
Write the expression below as a single logarithm. Need to know how to work this! ln(x-5/x^2 - 1) - ln (x^2 - 2x -15/x + 1)

geometry
Suppose CED = DBC. If m<EDC=63 degrees and m<DBC=82 degrees, what is m<DCE? Possible answers are 63, 82,145 or 35 degrees. GHF = LJK by HL? if so state all of the congruent parts that allow the use of HL. Possible answers Yes, <G= <L, GH=LJ,HF=Jk Yes, <g=<...

geometry
B is the midpoint of AC, D is the midpoint of CE, and Bd=14. find AE. B is the midpoint of AC, D is the midpoint of CE and BD=7. Find AE.

precalulus
use the intermediate value theorem to show that f(x) has a zero in the given interval. f(x) = -x^5 -2x^4 + 5x^3 + 4; [-0.9, -0.8] Stuck!

Physics
Entire esrth

Chemistry
how many moles of chlorine gas are required to react with 164 g of Br

earth
Rocks that become hot enough to melt and flow are referred to as ___ by scientists

stats
using a calculator need p value on a r tailed test if the n=9 and the t is 3.204

math
4 1/2

math
6 x 3/4 =

math
3/5 + 6 2/3 =

chemistry
What mass of calcium carbonate is precipitated out when 2.20 g of ammonium carbonate is added to 25.7 mL of a 4.00 M solution of calcium nitrate?

V/CV OR VC/V PATTERN
is tyrant a v/cv pattern or a vc/v pattern

English
web sites.

Spanish
I think I was suppose to put "A mí" in front of each of the responses, correct?

Spanish
I was asking if I said those parts correctly-

Spanish
I had to post the rest of my homeowrk here because it kept saying there was something wrong when I tried to put all the questions together Thank you very much for helping

Spanish
Tell which body part hurts after doing the activity 1.Listen to too much music Me duelen las orejas. 2.The exam was difficult.Me duele la cabeza. 3. Sat in the sun for 4 hours Me duele el cuerpo. 4.Talked and drank too much yesterday Me duele la garganta. 5.Escribiste Mucho en...

Spanish
I think I was suppose to put "A mí" in front of each of the me duele/me duelen responses or isn't it required? Thank you