Wednesday

October 26, 2016
Total # Posts: 820

**Math**

Why do you have to use estimation to find the number of triangles you need for the string? I was wondering why this question is quite confusing and i was wondering if you can explain it to me in a way i can understand it. I'm not looking for an answer just a more simpler ...

*October 21, 2016*

**Chemistry**

0.5g of MG ribbon is reacted with 100ml of 1M HCL. The initial temperature of HCL is 20.4 degrees celsius. After the reaction the highest recorded temperature is 40.7 degrees celsius. Calculate the molar enthalpy of MG. I tried to find mol from HCl and then use nH=mcdeltat. ...

*October 17, 2016*

**science**

no B

*September 30, 2016*

**science **

1. What is the main difference between mechanical and electromagnetic waves A. Mechanical waves involve transfer of energy; electromagnetic waves do not. B. Mechanical waves require a medium to travel in; electromagnetic waves do not. C. Mechanical waves have amplitude and ...

*September 30, 2016*

**MATHS**

The square of a number is 3 more than half the number.find the possible values of the number.

*September 28, 2016*

**English**

Yes kickass is right! 20/20

*September 23, 2016*

**Algebra **

Solve the system by elimination. X+y=4 X-y=-2 I can't figure this out please help

*September 18, 2016*

**Algebra**

Yes I got it now. Thanks so much for the help.

*September 14, 2016*

**Algebra**

The surface of the Grand Lake is at an elevation of 648 feet. During the current drought, the water level is dropping at a rate of 3 inches per day. If this trend continues, write an equation that gives the elevation in feet of the surface of Grand Lake after x days. I am ...

*September 14, 2016*

**Math**

If the perimeter of a rectangle is 70 feet what is the height to length of a ratio of 4:5

*September 14, 2016*

**Math**

A car leaves town traveling at 35 MPH. A 2nd Car leaves Town 2 hours later traveling in the same direction. In how many hours will the 2nd car be passing the first.

*September 7, 2016*

**Math**

A car leaves town traveling 35 MPH. Two hours later a 2nd car leaves, in the same direction traveling 55 MPH.In how many hours will the 2nd car be passing the first?

*September 7, 2016*

**Math**

A farmer had sheep and end.altogether 124 legs, how many sheep and hens

*September 5, 2016*

**physics**

A vertical container with base area measuring 12.3 cm by 13.7 cm is being filled with identical pieces of candy, each with a volume of 50.0 mm^3 and a mass of 0.0200 g. Assume that the volume of the empty spaces between the candies is negligible. If the height of the candies ...

*August 24, 2016*

**Thermodynamics physics **

A lead bullet moving at 204 m/s is stopped in a block of wood. All of the kinetic energy goes into heating the bullet. The initial temperature of the bullet is 25 degrees C. What is the final temperature of the bullet in degrees C

*June 16, 2016*

**leadership development**

1.Even though Mike is a great basketball player, he tries with just half effort on drills during practice. This is an example of A wasting talent B getting distracted C allowing others to set goals 2.Jim would like to get a summer internship, but his dad thinks he should work ...

*June 11, 2016*

**la language arts **

Joe magarac, Man of steel 8. In section 1, what does the author mean when he says joe magarac is a folk hero? A. Joe was a real man who spent his whole life in the steel mills of Pittsburgh. B. Joe was a mysterious figure who vanished without a trace.* C. Joe was a legend ...

*May 25, 2016*

**Chemistry **

Which of the following statements is true? All spontaneous processes are exothermic All non-spontaneous processes are exothermic All spontaneous processes release free energy*** Entropy always increases in a spontaneous process

*May 16, 2016*

**Chemistry**

The rate of a chemical reaction normally decreases as temperature increases is slowed down by a catalyst increases as reactant concentration increases*** decreases as reactant concentration increases

*May 16, 2016*

**Chemistry**

I meant to mark B as my answer sorry

*May 16, 2016*

**Chemistry**

Activation energy is the heat released in a reaction the energy barrier between reactants and products the energy given off when reactants collide*** generally very high for a reaction that takes place rapidly

*May 16, 2016*

**Health**

Both anorexia and bulimia can be treated by specific medications targeting eating disorders physiological therapy*** dieting personal trainers

*May 7, 2016*

**Health**

People who experience episodes of _______ are not eating out of hunger; they are acting out of behaviors associated with bulimia and depression anorexia starvation dieting binge eating*** fasting

*May 7, 2016*

**Health**

Which eating disorder might be discovered by a dentist anorexia bulimia*** starvation diet obesity

*May 7, 2016*

**Health**

Bulimia can be difficult to discover because most sufferers hide there condition and they tend to be a normal weight, sometimes overweight*** severely underweight slightly underweight obese

*May 7, 2016*

**Health**

_______ is a psychological eating disorder in which a person will binge eat and then purge there are no options for this one. I think it's bulimia but i'm not sure

*May 7, 2016*

**Health**

_________ commonly over-exercise, abuse laxatives, and refuse to eat in order to lose weight Bulimics Binge-eaters Anorexics*** Perfectionists

*May 7, 2016*

**Health**

Anorexia is considered a _______ disorder physical social predatory psychological***

*May 7, 2016*

**Health**

Individuals suffering from anorexia suffer extreme weight loss, usually _____ below the person's normal body weight 5% 8% 10%**** 15%

*May 7, 2016*

**Health**

Anorexia is a type of eating disorder that usually begins with young people with obese parents around the onset of puberty*** around the time they graduate high school who watch too much tv

*May 7, 2016*

**physics**

A typical red blood cell subtends an angle of only 1.7×10−5 rad when viewed at a person's near-point distance of 25 cm. Suppose a red blood cell is examined with a compound microscope in which the objective and eyepiece are separated by a distance of 13.0 cm . ...

*April 21, 2016*

**math**

Glenn raced his motorcycle 30 times last season. He finished first 12 times, second 5 times, and crashed in 9 races. What percent of the races did he finish second ? Set up as a proportion and solve

*April 19, 2016*

**AR**

How many 5-pound bags of apples can be made from 400 apples, each weighing ¼ pound?

*April 11, 2016*

**science**

i need someone to check my answers pless

*April 11, 2016*

**science**

anyone

*April 11, 2016*

**science**

Here are all the word you can use chemical property mixture heatcapasity homogeneous viscosity sublimitation physicalproperty compound chemicalformula substance density mass tempurature pressure heterogenerous A _________ property of matter describes its ability to change into...

*April 11, 2016*

**physics**

The lightbulb in the circuit shown in the figure has a resistance of 14 Ω and consumes 4.2 W of power; the rod is 1.18 m long and moves to the left with a constant speed of 2.9 m/s . The strength of the magnetic field is 2.2 T . Find the current that flows in the circuit...

*April 8, 2016*

**Algebra, Mathematics**

A $40 000 car depreciates at a rate of 13% per year. a) Write an equation to represent this situation. b) Find the value of the car in 3 years. c) How long does it take for the car to be worth half it's value?

*April 7, 2016*

**Physics (light)**

A soap film is viewed in white light. If the film is much thinner than the wavelength of blue light, what is the appearance of the film? The soap film appears totally transparent because it reflects no visible light. The soap film appears blue because all others colors are ...

*April 5, 2016*

**math **

The grass of a lawn grows slower the larger it gets. The length of the grass L is expressed in cm and the growth of the grass W in mm/day. If the grass is 2.7 cm tall at the end of day X, than it will be taller than 4cm 20 days later (assuming it will not be cut). this is a ...

*April 3, 2016*

**Chemistry**

using a 6.0M stock solution and a 2.5M stock solution, create two 0.01M solutions of hydrochloric acid with a 250mL volume

*March 25, 2016*

**math **

if 50,000 tons of freight imports came from japan and 200,000 came from the USA. Can you show the difference between the two in a percent? it says the the 50,000 tons from Japan is 30% less than what was imported from the USA which is 200000. But i can't seem to calculate ...

*March 20, 2016*

**Math **

at the end of 1999 you bought shares in a company for 100 euro. During 2000 the shares increase in value by 10%. During the 2001 the shares decreased in value by 10%. how much were the shares at the end of 2001?

*March 18, 2016*

**math. **

In Mrs. Harrington’s history class, 80% of the students speak English and 60% speak German. There are 30 students who can speak only one language. What is the maximum number of students who may speak both English and German in her class? so I think i'm supposed to ...

*March 16, 2016*

**PHYSICS**

Nate the Skate was an avid physics student whose main non-physics interest in life was high-speed skateboarding. In particular, Nate would often don a protective suit of Bounce-Tex, which he invented, and after working up a high speed on his skateboard, would collide with some...

*March 12, 2016*

**Physics**

An unfortunate astronaut loses his grip during a spacewalk and finds himself floating away from the space station, carrying only a rope and a bag of tools. First he tries to throw a rope to his fellow astronaut, but the rope is too short. In a last ditch effort, the astronaut ...

*March 12, 2016*

**Math**

William rode his bike 20 miles in 2 hours. Lorie rode her bike 30 miles in 2.5 hours. If they both continue at the same rate, how many more miles will lorie travel in 4.5 hours than William?

*March 7, 2016*

**math algebra**

Can someone help me with this question? A can in the shape of a right circular cylinder is required to have a volume of 1,000 cubic centimeters. The top and bottom are made up of a material that costs 10¢ per square centimeter, while the sides are made of material that ...

*February 22, 2016*

**history**

What r the answers to the test

*February 19, 2016*

**math**

135

*January 26, 2016*

**calculus**

Suppose f is a function of x. 1) find d/dx f^2 2)use the result to find the integral ∫ lnx/xdx. I did 1), and I got 2fdf, but im confused about number 2.

*January 11, 2016*

**Maths**

A Piece Of Cloth Costs Birr 200. If The Piece Was 5m Longer, And The Cost Of Each Metre Of Cloth Was Birr 2 less,the Cost Of The Piece Would Have Remained Unchanged. How Long Is The Piece And What Is Its Orginal Price Per Metre?

*January 6, 2016*

**biology**

what are the main similarties and differences between the three main food groups,carbohydrate,proteins and fats?

*January 1, 2016*

**Maths**

In A Two Digit Number, The Sum Of The Digits Is 14. Twice The Tens Digit Exceeds The Units Digit By One.Find the Numbers.

*December 9, 2015*

**Physics Help**

A dumbbell has a mass m on either end of a rod of length 2a. The center of the dumbbell is a distance r from the center of the Earth, and the dumbbell is aligned radially. If r≫a, the difference in the gravitational force exerted on the two masses by the Earth is ...

*December 7, 2015*

**organic chemistry**

Because alcohol protons are reasonably acidic and easily undergo exchange, it is important that the base be matched to the appropriate solvent. Explain why it would be virtually impossible to sort out the factors the size of the base or the stability of the alkenes formed if a...

*December 3, 2015*

**Social Studies (Help!)**

Yea

*December 1, 2015*

**Physics**

order the acceleration from least to greatest. a) 30<-object ->50 b) 20<-object c) 20<-object->40 d) 10<-object->30 I think the answer is "dcba" but that isn't right

*November 29, 2015*

**math**

An airplane can fly 625 miles with the wind in the same amount of time as it can fly 425 miles against the wind. If the wind speed is 50 mph, find the speed of the plane in still air. (Round your answer to the nearest whole number.)

*November 24, 2015*

**Math**

A ladder of mass M and length L leans against a wall as shown. There is no friction with the wall but there is friction with the ground. What is the maximum distance along the ladder that someone with mass m can climb without the ladder slipping?

*November 23, 2015*

**Math**

How many different arrays can you make with a total of 6counters?

*November 5, 2015*

**Physics**

A knight sits on a castle wall during a siege.To while away the time, he notes that boulders catapulted from below land on the top of his wall with a vertical velocity of 5.7 m/s. If he is 45 m above the catapult, what is the initial velocity of the boulders? The acceleration ...

*November 4, 2015*

**NEED HELP for homeschool**

Ask the college that you would want to go as to what would be a good alternative to the classes other students are taking in high school.

*November 4, 2015*

**Physics**

The tallest volcano in the solar system is the 29 km tall Martian volcano, Olympus Mons. An astronaut drops a ball off the rim of the crater and that the free fall acceleration of the ball remains constant throughout the ball’s 29 km fall at a value of 4.4 m/s 2. (We ...

*November 4, 2015*

**math**

C PPPPPPPPPPPP C PPPPPPPPPPPP C PPPPPPPPPPPP C PPPPPPPPPPPP This could be a diagram.

*November 4, 2015*

**ALGEBRA**

CHLOR PURCHASED A BOTTLE OF PERFUME FOR $1.60 PER 0.01 ONUNCE. WHAT IS THE UNIT C0ST OF THE PERFUME 1.60 DIVIDED BY 0.01=

*November 3, 2015*

**Pre calculus**

A plane is headed due south with an airspeed of 190 mph. A wind from the direction of S 40 degrees W is blowing at 30 mph. Find the groundspeed of the plane, rounded to the nearest whole number

*October 30, 2015*

**Physics**

A person 1.90 m tall walks on a horizontal icy surface. The coefficient of friction between the surface of the ice and the person's shoe sole is μ = 0.33 and the length of the person's legs are 1/2 of the person's height. Determine the maximum step length the ...

*October 4, 2015*

**Physics**

A person 1.90 m tall walks on a horizontal icy surface. The coefficient of friction between the surface of the ice and the person's shoe sole is μ = 0.33 and the length of the person's legs are 1/2 of the person's height. Determine the maximum step length the ...

*October 3, 2015*

**Physics**

A bullet shot horizontally strikes the ground with a velocity of 150.0km/h (10 degrees below the horizontal), determine the height from which it was fired.

*October 1, 2015*

**Physics**

If a ball is thrown at an initial speed of 8.0m/s at an angle of 35 degrees above the ground, what is the speed of the ball when it returns to its original height?

*September 13, 2015*

**Algebra**

3w-8d. Just distribute the negative sign without more information that is the only thing you can do.

*September 9, 2015*

**Pre-Calc**

Look up the unit circle online and it will help you. Go to google and you type calculus unit circle. The answer provided was correct. But make sure it's just (1/2,-sqrt(3)/2) don't have the 2 with the square root.

*September 9, 2015*

**Heat Transfer**

The inside wall of a furnace needs to be designed such that it transmits a maximum heat flux of 600 W/m2 . The inside wall temperature will be 1100°C and the outside temperature will be 150°C. We have two different types of bricks from which we can make the wall: Type...

*September 9, 2015*

**math**

Imagine if you have hot(+) bricks. If you add 2 hot bricks with 2 other hot bricks, you will have 4 hotness in total. Now let's say you have some cold(-) bricks. If you have the 4 hot bricks and add the two cold ones 4 + (-2) = 2 The cold bricks substrated from the overall...

*September 9, 2015*

**Math**

dumb butt

*August 26, 2015*

**math**

ur dumb

*August 26, 2015*

**ss**

HELP PLEASE

*August 24, 2015*

**ss**

Multiple Choice 1. What is the main advantage of using money instead of bartering? (1 point) Many more people today use money than bartering to get goods and services. Not all countries use the same types of money in their economies. Money comes in many ...

*August 24, 2015*

**physics**

A, DUE NORTH from start position B, 90 degrees East C, 37 degrees south east

*August 14, 2015*

**physics**

A football player runs the pattern given in the drawing by the three displacement vectors , , and . The magnitudes of these vectors are A = 4.00 m, B = 15.0 m, and C = 18.0 m. Using the component method, find the (a) magnitude and (b)direction of the resultant vector + + . ...

*August 14, 2015*

**Math Functions**

Write two equations to represent the same exponential function with a y-intercept of 5 and an asymptote at y=3 . Investigate whether other exponential functions have the same properties. Use the transformations to explain your observations.

*July 26, 2015*

**english**

A prepositional phrase modifies a word and relates that word to the preposition's _____.

*June 18, 2015*

**Chemistry**

What intermolecular forces are present in CSH2??

*June 13, 2015*

**math**

a cylindrical container has a diameter of 14cm and a height of 20cm and is full of water. The water is poured into another cylinder which has a diameter of 20cm. How deep is the water in the second cylinder?

*June 6, 2015*

**Math**

Prime factorize the following using factor tree method: 66, 99, 20, 108, 37 and 450

*June 4, 2015*

**Algebra 2 **

- Simplify: x^2+6x+8/x^2-2x-8 . Identify any excluded values - Simplify : x^2-36/x^2+6x * x^3+4x^2/x^2-4x-12

*May 28, 2015*

**english**

can i get a quiz check Question 1.1. Choose the sentence that is punctuated correctly. (Points : 1) =====-> Many people are afraid of bold futuristic inventions Why did you spend all your money on expensive trendy clothes that you'll only wear a month or so? Oh, no, Mom...

*May 27, 2015*

**math**

which fraction is between 0 and 2/4 !!!!!!!!!!!

*May 20, 2015*

**Algebra 1**

A teacher graded the tests for each of her students. She calculated a mean grade of 80 and a standard deviation of 3. One of her students, Katrina, had a z-score of 2. What grade did Katrina get on the test?

*May 10, 2015*

**Chemisrty**

To what volume must 1.0 l of a 6.0 m solution of hcl be diluted in order to prepare a 0.2 m solution? I just need to find wht steps i need to take to get the answer

*April 27, 2015*

**math**

local students were surveyed about adding stoplights at the corner of Main Street and Perry Avenue. Determine whether each survey question may be biased. Explain A) are stoplights needed at the intersection of Main and Perry? B) should stoplights be installed at the corner of ...

*April 20, 2015*

**physics**

Calculate the range of the projectile using the initial speed and angle. Use g = 9.8m/s your calculation. Initial speed is 18m/s Angle is 75 Help please !!

*April 13, 2015*

**Spanish**

What is UOLSRRSEDELO unscrambled? The word is a spanish word and is written as: _ _ _(space) _ _ _ _ _ _ _ _ _ Thanks!

*March 25, 2015*

**Physics**

There 46.5J of elastic potential energy stored in a spring. How far is the spring stretched if the spring constant is 455N/m

*March 24, 2015*

**l.a**

yes

*March 12, 2015*

**l.a**

put the worlds in order trellis,treasure,trestle,treason,treble

*March 12, 2015*

**Math**

find the area in the first quadrant bounded above by y=sinx, below by the x-axis, and to the right by x=pi/2 is divided into two equal parts by the line x=a. Find a.

*March 1, 2015*