Saturday

October 22, 2016
Total # Posts: 2,353

**physics**

The system in the Figure is in equilibrium. A mass M1 = 242.0 kg hangs from the end of a uniform strut which is held at an angle theta = 41.0o with respect to the horizontal. The cable supporting the strut is at angle alpha = 27.0o with respect to the horizontal. The strut has...

*April 10, 2012*

**physics**

The weightless horizontal bar in the figure below is in equilibrium. Scale B reads 4.00 kg (N.B. as you know, the scale should read N, but no one told the manufacturer). The distances in the figure (which is not to scale) are: D1 = 9.0 cm, D2 = 8.0 cm, and D3 = 6.5 cm. The ...

*April 10, 2012*

**math**

Jane needs to fill her pool with water. Ace said it will take them 40 minutes to fill the pool. Ben said it will take them 60 minutes to fill the pool. How long it will take for both Ace and Ben to fill the pool at the same time?

*April 6, 2012*

**chemistry**

16.67ml

*March 28, 2012*

**Math**

Based on the data, of 40% Reading and 25% Math, Out of 240 students, how many would choose reading or math as their favorite subject?

*March 27, 2012*

**Chemistry**

The Energy from glucose is obtained from the oxidation reaction C6H12O6 + 6O2 --> 6CO2 + 6H2O How would a similar reaction look for Sucrose? I am trying to find an equation about how the body uses a compound, in this case sucrose. I'm just not sure how different that ...

*March 22, 2012*

**Physics**

0.17meter

*March 20, 2012*

**math**

If (x – 3) divides evenly into x3 – x2 – kx + k, find k. (2 marks)

*March 20, 2012*

**math**

Complete the square to find the vertex of each quadratic function. State the vertex. (10 marks) A) f(x) = x2 + 8x – 3 B) f(x) = x2 – 5x + 8 C) f(x) = 2x2 – 12x + 1 D) f(x) = 3x2 + 2x – 5

*March 20, 2012*

**math**

Determine the remainder of the following polynomial divisions: (2 marks) A) (4x4 + 3x2 - x + 3) ÷ (x + 1) B) (3x2 + 2x - 7) ÷ (2x - 1)

*March 20, 2012*

**math**

Solve for x in the following equations. (4 marks) log3(x - 5) + log3(x + 3) = 2 <--- both log3.. 3 is subscript log7x + log7(x - 1) = log72x <--- all log7.. 7 is subscript.

*March 19, 2012*

**math**

log(27) / log(1/3) log(3^3) / log(3^-1) 3 log(3)/-1 log(3) -3

*March 19, 2012*

**math**

a) Log2(x^2 – 9/x^3)^3 <----- log2 2 is subscript. b)loga 5a^4 <---- loga a is subscript.

*March 19, 2012*

**math**

On the outside of what kind of triangle? right triangle or what? If you copy and paste the picture it might help or go more in depth with details please. Is that the entire question? Help me help you hahaha

*March 15, 2012*

**math**

I want to help but i feel as though i don't have all the info i need. Are angle 1 and 3 perpenticular or suppose to be similar or on the inside of a triangle?

*March 15, 2012*

**math**

Is this about a triangle or what?

*March 15, 2012*

**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???????

*March 15, 2012*

**math**

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

*March 15, 2012*

**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

*March 15, 2012*

**maths**

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

*March 15, 2012*

**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) ...

*March 13, 2012*

**Calculus (Definite Integrals - Force) Please Help**

Answer is B 6120

*March 12, 2012*

**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...

*March 12, 2012*

**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 ...

*March 11, 2012*

**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...

*March 10, 2012*

**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?

*March 9, 2012*

**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.

*March 8, 2012*

**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)

*March 8, 2012*

**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 ...

*March 8, 2012*

**business**

they changed the answers on penn foster

*March 7, 2012*

**please answer this Ms. Sue**

how do you write a fraction as a decimal?

*March 6, 2012*

**MS. SUE PLEASE ANSWER**

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

*March 6, 2012*

**MS. SUE PLEASE ANSWER**

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

*March 6, 2012*

**MS. SUE PLEASE ANSWER**

i still don't geit

*March 6, 2012*

**MS. SUE PLEASE ANSWER**

how do you write a fraction for a decimal?

*March 6, 2012*

**science**

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

*March 5, 2012*

**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

*March 1, 2012*

**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...

*March 1, 2012*

**Microbiology**

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

*February 29, 2012*

**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?

*February 29, 2012*

**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?

*February 28, 2012*

**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...

*February 26, 2012*

**math**

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

*February 26, 2012*

**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 ...

*February 25, 2012*

**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 ...

*February 21, 2012*

**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?

*February 20, 2012*

**Chemistry**

Ok thank-you anyway. I appreciate it.

*February 18, 2012*

**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 ...

*February 18, 2012*

**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 ...

*February 17, 2012*

**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 ...

*February 17, 2012*

**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.

*February 17, 2012*

**Chemistry**

THANK YOU!

*February 17, 2012*

**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...

*February 17, 2012*

**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

*February 15, 2012*

**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.

*February 15, 2012*

**math**

my x and y are in ml not liters..

*February 15, 2012*

**math**

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

*February 15, 2012*

**AP English Literature**

Thank you so much. I really appreciate it.

*February 13, 2012*

**AP English Literature**

E) synecdoche is that the correct answer?

*February 13, 2012*

**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) ...

*February 13, 2012*

**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

*February 13, 2012*

**MATH**

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

*February 12, 2012*

**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 (...

*February 10, 2012*

**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?

*February 10, 2012*

**GEOMETRY**

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

*February 9, 2012*

**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

*February 9, 2012*

**chemistry**

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

*February 8, 2012*

**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

*February 7, 2012*

**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

*February 2, 2012*

**Geometry**

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

*February 2, 2012*

**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?

*February 1, 2012*

**Math- Algebra**

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

*January 31, 2012*

**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?

*January 29, 2012*

**prealgebra**

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

*January 28, 2012*

**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=

*January 27, 2012*

**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

*January 23, 2012*

**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

*January 19, 2012*

**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 ...

*January 19, 2012*

**psy/300**

How does sensation and perception affect learning?

*January 19, 2012*

**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.

*January 18, 2012*

**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 ...

*January 15, 2012*

**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.

*January 15, 2012*

**psy/300**

how does sensation and perception affect learning?

*January 14, 2012*

**algebra**

Thanks so much for your help!!

*January 12, 2012*

**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?

*January 12, 2012*

**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...

*January 8, 2012*

**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

*January 8, 2012*

**Math**

Solve for x: 5x−5>10x+6

*December 31, 2011*

**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?

*December 30, 2011*

**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?

*December 30, 2011*

**Math**

Thanks

*December 30, 2011*

**Math**

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

*December 30, 2011*

**algebra**

WHAT DO YOU CALL A DUCK THAT STEALS?

*December 19, 2011*

**pre calculus**

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

*December 17, 2011*

**pre calculus**

Thank you!

*December 17, 2011*

**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)

*December 17, 2011*

**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=<...

*December 11, 2011*

**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.

*December 11, 2011*