Monday

November 30, 2015
Total # Posts: 88,535

**Physics**

A uniform electric field exists everywhere in the x, y plane. This electric field has a magnitude of 5600 N/C and is directed in the positive x direction. A point charge -9.6 × 10-9 C is placed at the origin. Find the magnitude of the net electric field at (a) x = -0.20 ...
*September 27, 2015*

**Pre-Algebra**

194
*September 27, 2015*

**math**

An item is on sale at 40% off the regular price. It is taxed at a rate of 6%. If the final sale price including tax is $57.24, then what is the sale price of the item without tax? What was the regular price of the item? The sale price of the item without tax was $________. The...
*September 27, 2015*

**math**

The sum of the ages of Jose and Valerie is 78 years. 9 years ago, Jose's age was 3 times Valerie's age. How old is Jose now? (A) Translate the given information into an equation using the variable x = current age of Jose. Your equation should contain 78, 3, and 9. Do ...
*September 27, 2015*

**math**

Gregory is 2 years older than Esmeralda. In 5 years the sum of their ages will be 42. How old is Esmeralda now? (A) Translate the given information into an equation using the variable x = current age of Esmeralda. Simplify the left side of your equation. __________________= 42...
*September 27, 2015*

**math**

An item is on sale at 40% off the regular price. It is taxed at a rate of 6%. If the final sale price including tax is $57.24, then what is the sale price of the item without tax? What was the regular price of the item? The sale price of the item without tax was_______ $. The ...
*September 27, 2015*

**math**

The sum of the ages of Jose and Valerie is 78 years. 9 years ago, Jose's age was 3 times Valerie's age. How old is Jose now? (A) Translate the given information into an equation using the variable x = current age of Jose. Your equation should contain 78, 3, and 9. Do ...
*September 27, 2015*

**Economics**

None
*September 27, 2015*

**math**

Gregory is 2 years older than Esmeralda. In 5 years the sum of their ages will be 42. How old is Esmeralda now? (A) Translate the given information into an equation using the variable x = current age of Esmeralda. Simplify the left side of your equation. = 42 (B) How old is ...
*September 27, 2015*

**Chemistry**

Find two interesting factoids for ammonium iodide, sodium acetate, silver nitrate, calcium carbonate, lithium carbonate, aluminum chloride, and potassium iodide. What does "factoids" mean? I am still confused with the definition. Does it mean that the information is ...
*September 26, 2015*

**Chemistry**

A 150.0-g sample of a metal at 69.7°C is added to 150.0 g of H2O at 10.5°C. The temperature of the water rises to 13.6°C. Calculate the specific heat capacity of the metal, assuming that all the heat lost by the metal is gained by the water.
*September 26, 2015*

**math**

Gregory is 2 years older than Esmeralda. In 5 years the sum of their ages will be 42. How old is Esmeralda now? (A) Translate the given information into an equation using the variable x = current age of Esmeralda. Simplify the left side of your equation. = 42 (B) How old is ...
*September 26, 2015*

**calculus**

domain of -9/2+t^2 and 1-4t/2+t
*September 26, 2015*

**math**

a swimming pool is 25m by 15m.A 2-m concrete walk is built around the pool.What is the area of the walk?
*September 26, 2015*

**Phsyics**

To ward off oceanic invaders, a cannon is placed 10 meters from the water's edge, pointing out at sea. The cannon is capable of firing a projectile at a maximum velocity of 100m/s. a) what is the maximum firing range of the cannon? b)If the cannon was placed on a cliff ...
*September 26, 2015*

**differential calculus**

then find the domain of its derivative
*September 26, 2015*

**differential calculus**

differentiate g(t)=3/sqrt(t)
*September 26, 2015*

**Physics**

Fnet = F1 + F2+ . . . Fnet =(10.3 N [North])+(19.5 N [South]) - 15.2 N [South] = 14.6 N [North] Fnet = ma a = Fnet/m 14.6 N [North]/(4.06 kg) a = 3.60 m/s/s [North]
*September 26, 2015*

**SS**

Was Phoenicia in Mesopotamia?
*September 26, 2015*

**Calculus**

You are expecting a tax refund of $4,000 in 4 weeks. A tax preparer offers you an "interest-free" loan of $4,000 for a fee of $50 to be repaid by your refund check when it arrives in 4 weeks. Thinking of the fee as interest, what simple interest rate would you be ...
*September 26, 2015*

**Edible playdough**

Hey guys, Does anyone have a website for edible playdough that does not require a heat source(ie. microwave, stove top)? I am doing this for a demonstration speech.
*September 26, 2015*

**AP Chem**

Also... Hg2(2+) + 2e- >> Hg2(2+) +0.92V Mn(2+) + 2e- >> Mn -1.18V
*September 26, 2015*

**AP Chem **

Write the half reactions and the balanced equation for the galvanic cell Hg(ℓ)| Hg2+ 2 (aq)|| MnO− 4 (aq), Mn2+(aq), H +(aq)| Pt(s). What is the smallest possible integer coef- ficient of H+(aq) in the combined balanced equation?
*September 26, 2015*

**Z table**

The extract of a plant native to Taiwan has been tested as a possible treatment for Leukemia. One of the chemical compounds produced from the plant was analyzed for a particular collagen. The collagen amount was found to be normally distributed with a mean of 73 and standard ...
*September 26, 2015*

**Z table**

(1 point) Women's weights are normally distributed with a mean given by μ=143 lb and a standard deviation given by σ=29 lb. Find the fifth decile, D5, which separates the bottom 50% from the top 50%
*September 26, 2015*

**St Teresas College**

What would be the difference between seawater and pure water in terms of osmotic pressure and vapour pressure?
*September 26, 2015*

**chemistry**

The temperature at which crystal will first appear when a solution is cooled from 60°c to 20°c?
*September 26, 2015*

**chemistry**

The temperature at which crystal will first appear when a solution is cooled from 60°c to 20°c?
*September 26, 2015*

**Arithmetic**

A shopper bought 4 pillow cases that cost $4.98 a piece, 2 fitted sheets that cost $8.29 a piece, and 2 flat sheets that cost $8.09 a piece. What was her total bill?
*September 26, 2015*

**math**

A team won 8 of the 24 games it played in one season. What percentage of the games did it win?
*September 26, 2015*

**Arithmetic**

Two sailors traveled by bus from one point to another. The trip took 15 hours, and they left their point of origin at 8am. What time did they arrive at their destination?
*September 26, 2015*

**PHYSICS**

1.)what is the magnitude of the force experienced by a proton moving at 3 km/s inside magnetic field of strength 0.05T 2.)an electron is moving at 2x10^5 m/s through a uniform magnetic field of 1.4x10^-3 T.what is the magnitude of magnetic force if the velocity of the electron...
*September 26, 2015*

**Arithmetic**

A student must walk 2 miles to get to school. If she walks at an average of 3 miles per hour, how many minutes should it take her to walk to school?
*September 26, 2015*

**Arithmetic**

During a sale, CD'S that normally cost $6.98 each were priced at 2 for $12.50.Pete bought 4 CD'S at the sale price. How much money did he save by buying the 4 CDS on sale?
*September 26, 2015*

**Organic Chemistry**

1+2 = 43
*September 26, 2015*

**CBU**

1 mole is 6.022 * 10^23 what is your question? is there an equation that u need to solve?
*September 26, 2015*

**Algebra**

woops, i mean 23/5
*September 26, 2015*

**Algebra**

go to the website wolframalpha (google it) and copy and paste this: [5-(13)/(x-2)] ÷ [(6)/(x-2)-7] im assuming that's what you mean by the equation. if that is how your equation looks like then your answer for x should be x = 23/3 ????? if i got it wrong, try using ...
*September 26, 2015*

**Z table**

jjlkjl
*September 25, 2015*

**Z table**

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). The mean maximum oxygen uptake for elite athletes has been found to be 75 with a standard deviation of 6.3. Assume that the ...
*September 25, 2015*

**Math**

ii need helpp
*September 25, 2015*

**interest**

Find the future value an investment of $4720 at 534% simple interest for 9 years.
*September 25, 2015*

**Z table**

Suppose that the readings on the thermometers are normally distributed with a mean of 0∘ and a standard deviation of 1.00∘C. If 8% of the thermometers are rejected because they have readings that are too high, but all other thermometers are acceptable, find the ...
*September 25, 2015*

**Statistics**

Mean: (36000+2000/8)
*September 25, 2015*

**Statistics**

The mean salary of 8 employees is $36000 and the median is $32000. This highest-paid employee gets a $2000 raise. What is the new mean salary of the 8 employees? median doesn't change. I just can't figure out the mean. I tried (36000+8000/8) but it wasn't right.
*September 25, 2015*

**Statistics**

The mean salary of 8 employees is $36000 and the median is $32000. This highest-paid employee gets a $2000 raise. What is the new mean salary of the 8 employees?
*September 25, 2015*

**Statistics**

The mean salary of 8 employees is $36000 and the median is $32000. This highest-paid employee gets a $2000 raise. What is the new mean salary of the 8 employees? What is the new median salary of the 8 employees?
*September 25, 2015*

**Calculus**

area of window=x*3x+PI*x^2 Perimeter=2*3x+x+PI*r This is hardly calculus.
*September 25, 2015*

**Chemistry 120**

Write the formulas of the compounds formed by Pb4+ with the following anions: NO3−, HCO3−, SO42−, H2PO4
*September 25, 2015*

**Indices**

The power of 2 and power of 4 are seperate questions. So why are we adding the powers?
*September 25, 2015*

**Indices**

If P=(64)^-2 Q=1/(16)^1/3 R=8root2 Express pqr as i) a power of 2 ii) a power of 4
*September 25, 2015*

**Social Studies**

Good job.
*September 25, 2015*

**Maths - coordinate geometry**

So Y= 1/2x+5/2
*September 25, 2015*

**Maths - coordinate geometry **

Find a equation of the line passing through (-1,2) which is parallel to the line with equation 2y=x+4 Thankyou x
*September 25, 2015*

**English**

What are some interesting ideas for a topic sentence about what I want to achieve in an English class?
*September 25, 2015*

**Math**

Mrs. Johnson’s class is having a pizza party. If there are 14 students and 7 pizza’s cut into 8 slices, what answer choice represents the fraction of one pizza that each student receives?(1 point) answer choices 1/3 1/4 1/2 1/8 I chose 1/4..Can you tell me if I'...
*September 25, 2015*

**physics**

How much time does a passerby on the sidewalk below have to move out of the way before the flowerpot hits the ground? Answer in units of s.
*September 25, 2015*

**biology-microscope**

1. should the aperture diaphragm be adjusted to its most open or its least open setting, to begin? 2.where should the stage be set when you first observe the specimen, using the low power objective lens?
*September 25, 2015*

**physics**

A flowerpot falls from a window sill 38.5 m above the sidewalk. What is the velocity of the flowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s.
*September 25, 2015*

**physics**

A tennis ball is thrown vertically upward with an initial velocity of +7.5 m/s. What will the ball’s velocity be when it returns to its starting point? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s.
*September 25, 2015*

**physics**

A robot probe drops a camera off the rim of a 323 m high cliff on Mars, where the free-fall acceleration is 3.7 m/s2 . Find the velocity with which it hits the ground. Answer in units of m/s.
*September 25, 2015*

**calculus**

Find the point on the curve y = x^3 which is nearest the point (4, 0).
*September 25, 2015*

**calculus**

Find the point on the curve y =2/3 〖√(18-x^2 )〗 (first quadrant) where a tangent line may be drawn so that the area of the triangle formed by the tangent line and the coordinate axes is a minimum.
*September 25, 2015*

**calculus**

A rectangular field is to be fenced, one side of which is the edge of a straight river. It is given that the material for the two opposite side costs Php 3.00 per meter and the material for the side opposite the river costs Php 6.00 per meter. If an amount of Php 600.00 is ...
*September 25, 2015*

**calculus**

A manufacturer of a certain brand of appliance estimates that he can sell 5000 units a year at Php 900.00 each and that he can sell 1500 units more per year for each Php 100.00 decrease in price? What price per unit will give the greatest returns?
*September 25, 2015*

**physics**

A certain car is capable of accelerating at a uniform rate of 0.83 m/s2 . What is the magnitude of the car’s displacement as it accelerates uniformly from a speed of 80 km/h to one of 92 km/h?
*September 25, 2015*

**General Chemistry**

how do you do 9*9 to the 69
*September 25, 2015*

**Chemistry**

when I used the second formula I get g.Au? :(
*September 25, 2015*

**Chemistry**

when I used the second formula I get g.Au? :(
*September 25, 2015*

**Chemistry**

sir, when I used the first formula, I get 73.7g. Ag is that correct? or there's something wrong with my calculation?
*September 25, 2015*

**Chemistry**

I tried that formula. I guess it's wrong :(
*September 25, 2015*

**Chemistry**

I tried that formula. I guess it's wrong :(
*September 25, 2015*

**Chemistry**

How many grams silver is added to 13 grams gold to produce 85% gold alloy?
*September 25, 2015*

**Chemistry**

drbob222 I tried that formula bu I guess it's wrong :(
*September 25, 2015*

**Chemistry**

How many grams silver is added to 13 grams gold to produce 85% gold alloy?
*September 25, 2015*

**algebra 2**

jnhfdjhgfhkjgfj
*September 25, 2015*

**geometry**

A small airplane takes off from point A and continues to climb upward in a straight line, as shown in the diagram. What is the plane’s distance from point A when it reaches point C?
*September 25, 2015*

**physics**

A certain car is capable of accelerating at a uniform rate of 0.83 m/s2 . What is the magnitude of the car’s displacement as it accelerates uniformly from a speed of 80 km/h to one of 92 km/h?
*September 25, 2015*

**Physics**

1.28 m/s^2
*September 25, 2015*

**Physics - URGENT**

Four forces are acting on an object in static equilibrium: Force 1 has a magnitude of 46.0 N and is acting at an angle of 52 degrees above the positive x-axis. Force 2 has a magnitude of 29 N and is acting along the positive x-axis. Force 3 has a magnitude of 34.5 N and is ...
*September 25, 2015*

**Physics**

5.185 x 10-5 ohm
*September 25, 2015*

**Algebra**

A school store has1200 pencils in stock, and sells an average of 24 pencils per day. The manager reorders when the number of pencils in stock is 500. In how many days will the manager have to reorder.?
*September 25, 2015*

**biochemistry**

i have another question
*September 24, 2015*

**biochemistry**

i have another question
*September 24, 2015*

**biochemistry**

the date?
*September 24, 2015*

**biochemistry**

it is different!
*September 24, 2015*

**biochemistry**

Based on the mass of lactose that you isolate from 1 ml of skim milk, calculate the percent composition of lactose in skim milk. (If you found protein in the “purified lactose” sample or lactose in your “purified casein” sample, then you need to speak with ...
*September 24, 2015*

**chemistry**

idek how to do it
*September 24, 2015*

**chemistry**

the casein recorded was 0.91 grams
*September 24, 2015*

**chemistry**

it is 16.4%
*September 24, 2015*

**chemistry**

Use the percent composition of total protein in skim milk to determine the percent of the total protein that is due to the casein fraction.
*September 24, 2015*

**chemistry**

0.28/1*100= idek how to do it
*September 24, 2015*

**chemistry**

based on the mass of lactose that you isolate from 1 mL of skim milk, calculate the percent composition of lactose in skim milk. mass of lactose= 0.28 grams
*September 24, 2015*

**Chemistry**

how many gram of Cl are in475g of CaCl
*September 24, 2015*

**Physics**

Three boxes A, B, and C are placed on a frictionless surface as shown in the diagram below. If you push on box A with a force of 8.25 N, find the magnitude of the contact force between each pair of boxes. Here mA = 6.90 kg, mB = 3.80 kg, and mC = 1.50 kg. contact force between...
*September 24, 2015*

**Physics**

A mover has to move a heavy sofa of mass 49.0 kg to the second floor of the house. As he pulls on the rope tied to the sofa, he makes sure that the rope is parallel to the surface of the ramp, which is at 30.0° to the horizontal. If the coefficient of kinetic friction ...
*September 24, 2015*

**Physics**

ou are helping your friend move a new refrigerator into his kitchen. You apply a horizontal force of F = +214i − 171k N to try and move the 64.0-kg refrigerator. The coefficient of static friction is 0.660. (a) How much static frictional force does the floor exert on the...
*September 24, 2015*

**Physics**

Three boxes A, B, and C are placed on a frictionless surface as shown in the diagram below. If you push on box A with a force of 8.25 N, find the magnitude of the contact force between each pair of boxes. Here mA = 6.90 kg, mB = 3.80 kg, and mC = 1.50 kg.
*September 24, 2015*

**English**

What about this one? It isn't as well known. "No doubt the feat was easy to Mr. Utterson; for he was undemonstrative at the best, and even his friendship seemed to be founded in a similar catholicity of good-nature." (Stevenson)
*September 24, 2015*

**English**

Is this passage plagiarized? I think so, because only the author's name is given and not the page number in the in-text citation. "...fathers brought forth on this continent a new nation, conceived in liberty and dedicated to the proposition that all men are created ...
*September 24, 2015*