Wednesday

October 7, 2015
Total # Posts: 85,610

**AP Physics**

Question Part Points Submissions Used The drawing below shows a person who, starting from rest at the top of a cliff, swings down at the end of a rope, releases it, and falls into the water below. There are two paths by which the person can enter the water. Suppose he enters ...
*October 1, 2015*

**SCI/220**

these relatives do not share the same genetic predisposition for heart disease
*October 1, 2015*

**SCI/220**

You have two relatives both 55 years old and both have always eaten a diet of primarily fast food. One of these relatives has severe heart disease and the other has low cholesterol levels and no sign of heart disease. What is the best explanation for this? these relatives have...
*October 1, 2015*

**Chemistry**

Determine the total grams of Potassium Iodate solution
*October 1, 2015*

**Physics**

n vs. v^2
*October 1, 2015*

**Physics**

897 kg
*October 1, 2015*

**physics **

A 5 kg magnet exerts a constant force of 3 N on a 0.25 kg magnet. What force will the smaller magnet exert on the larger magnet?
*October 1, 2015*

**Anonymous**

1) An open sentence can be either true or false depending on what values are used. [Source: Mathisfun] 2) An equation can be made to predict what comes next in a sequence. Suppose y=2x. Y (the term in a sequence) is twice of each value of x we put (1,2,3). From this, we can ...
*October 1, 2015*

**Math**

annie has save $27 of her allowance. she needs $50 to register for a skateboard event this summer . Express the fraction of the registration fee that she has saved as a decimal.
*October 1, 2015*

**filling procedue**

tme wdk uladj jmjm
*October 1, 2015*

**Technology**

Using eireless phones to call people
*October 1, 2015*

**Technology**

Which of the following is an example of a recent development in technology
*October 1, 2015*

**math**

If you have 4,358 students at one school and another school has 3times that many students, how many students are there?
*October 1, 2015*

**Tech**

1-d 2-b 3-a
*October 1, 2015*

**Tech**

Are you serious? Awe, i'm sorry. Questions like these can be so idiotic! I would think these were all right!
*October 1, 2015*

**chemistry**

Oxidizing agents remove electrons. Reducing agents donate electrons. Cl takes away electrons from Ca as seen in the product.
*October 1, 2015*

**Physics**

Oh, I'm sorry. I didn't consider that it was 'sound' I'm working on it. What do I need to find first?
*October 1, 2015*

**Physics**

In air, the distance traveled by a sound wave is 140 meters during 400 vibrations. If the frequency of the tuning fork is 500 Hz, find the velocity of sound in air. Here's what I did: Wavelength= 140/400=0.35 So, velocity= 500*0.35= 175 m/s Am I right?
*October 1, 2015*

**Chemistry**

you are a public health officer in the water treatment facility for a city of 50,000 people . A concentration of 1.0 ppm of fluoride in the drinking water is sufficient for the purpose of helping to prevent tooth decay. The compund normally chosen for fluoridation is the same ...
*October 1, 2015*

**physics**

A superhero flies 172 m from the top of a tall building at an angle of 23 ◦ below the horizontal. What is the horizontal component of the superhero’s displacement? Answer in units of m.
*October 1, 2015*

**physics**

A truck travels up a hill with a 13◦ incline. The truck has a constant speed of 18 m/s. What is the horizontal component of the truck’s velocity? Answer in units of m/s
*October 1, 2015*

**physics**

While following the directions on a treasure map, a pirate walks 37.8 m north, then turns and walks 5.2 m east. What is the magnitude of the single straight-line displacement that the pirate could have taken to reach the treasure? Answer in units of m. 004 (part 2 of 2) 10.0 ...
*October 1, 2015*

**physics**

At what angle with the north would he have to walk? Answer in units of ◦ .
*October 1, 2015*

**physics**

While following the directions on a treasure map, a pirate walks 37.8 m north, then turns and walks 5.2 m east. What is the magnitude of the single straight-line displacement that the pirate could have taken to reach the treasure? Answer in units of m.
*October 1, 2015*

**chemistery**

a balloon contains 3.86 L of argon at a temperature of 45 Celsius, what would the volume at 80 celsius
*October 1, 2015*

**Math**

Which one is greater! 59.875 or 59.78 Which symbol? (>,<, or =)
*October 1, 2015*

**Math**

particles move at x=2sin(t), y=3cos(t),z=t at any t>0. What is the accelaration and jerk
*October 1, 2015*

**Math**

joe needs to construct a fence that is 75 yards long and 40 yards wide the arra also needs to be divided into 3 equal sections how many yards of fencing will be needed?
*October 1, 2015*

**sat**

A fence consist of sections built in a row. the figure above shows the first two sections of the fence. each section is identical and consists of two horizontal boards between consecutive vertical posts. each post cost $ 8 and each board coat $6. If the total cost of the ...
*September 30, 2015*

**Physic**

A Coast Guard ship is traveling at a constant velocity of 4.13 m/s, due east, relative to the water. On his radar screen the navigator detects an object that is moving at a constant velocity. The object is located at a distance of 3900 m with respect to the ship, in a ...
*September 30, 2015*

**Chemistry**

But it is saying the soecifc gravity of 25.0 mL of the liquid so the density changes. That's what threw me off... It wouldn't equal the density
*September 30, 2015*

**Chemistry **

Suppose the density of 100.0 mL of some liquid was found to be .78 g/mL . What would be the specific gravity of 25.0 mL of the liquid?
*September 30, 2015*

**Chemistry **

Mary was determining the density of a metal cylinder. When recording the diameter, she mistakenly recorded a number that was too small. Will her calculated value for density be too high or too low? Explain
*September 30, 2015*

**math for managers**

Cost analysis Te owner of a small construction busi-ness needs a new truck. He can buy a diesel truck for $38,000 and it will cost him $0.24 per mile to operate. He can buy a gas engine truck for $35,600 and it will cost him $0.30 per mile to operate. Find the number of miles ...
*September 30, 2015*

**Biology**

Synthesis means the process by which simple compounds are united to form more complex materials. Dehydration means loss of water. Explain why chemists refer to the joining of monosaccharide molecules to form disacchardies as dehydration synthesis reaction
*September 30, 2015*

**math**

Kim has a balance of -20.59 in her account. Her bank requires a minimum balance of 40.00 How much does kim need to deposit in order to have a 40.00 balance
*September 30, 2015*

**Physics**

A "swing" ride at a carnival consists of chairs that are swung in a circle by 17.4 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 291 kg. (a) Determine the tension in the cable attached to ...
*September 30, 2015*

**Multivariable calculus**

Find dy/dx x=te^t y=t+sint
*September 30, 2015*

**Physics**

In the design of a rapid transit system, it is necessary to balance the average speed of a train against the distance between station stops. The more stops there are, the slower the train's average speed. To get an idea of this problem, calculate the time it takes a train ...
*September 30, 2015*

**History**

summarize the differences and a way to understand the similarities between gnp and gdp and gni
*September 30, 2015*

**english**

a personal narrative is like an autobiography in that it
*September 30, 2015*

**Geometry**

Are all horizontal lines parallel Use slope to explain how you know I put yes
*September 30, 2015*

**physics**

in a slap shot,a hockey player accelerates the puck from a velocity of 5.5m/s to 36m/s. if the shot take 3.16*10^-2, find the distance
*September 30, 2015*

**physics**

Calculate the change in energy of an atom that emits a photon of wavelength 2.21 meters. (Planck’s constant is 6.626 x 10-34 joule seconds, the speed of light is 2.998 x 108 m/s)
*September 30, 2015*

**math**

abel,belle and cindy have $408. belle has 7$ more than cindy and $5 more than abel, how much does abel have?
*September 30, 2015*

**Math Answer Check**

For #4, why did you take the square root of 3720 when r^2 = 3721?
*September 30, 2015*

**Math Answer Check**

1. cos^-1((-sqrt3)/2) 5pi/6 2. arccos(cos7pi/2) -pi/2 3. sin^-1(sin7pi/4) -pi/4 4. csc(arctan11/60) 61/11
*September 30, 2015*

**Advanced function**

Thank you:)
*September 30, 2015*

**english**

you, should bring
*September 30, 2015*

**english**

Select the letter of the answer that correctly identifies the subject and complete verb in each sentence. You should bring a change of clothes to the beach a. you, bring b. you, should bring c. clothes, bring
*September 30, 2015*

**math **

so if a car goes east 30mph and th other car was going 60mph south for one hour how far will they be from each other
*September 30, 2015*

**english**

No, they have not been defined.
*September 30, 2015*

**english**

true or false 1.The "bottoms up" proofreading technique involves reading a paper one sentence at a time, from the beginning to the end. 2.Writers who make many mistakes should concentrate finding the worst errors.
*September 30, 2015*

**mathematics**

i am greater than a hundred. if you divide me by 25,you will get 5.
*September 30, 2015*

**Algebra II**

Thank you for the explanation Steve! I understand why I was confused and get the problem now. Again, thanks!
*September 29, 2015*

**Algebra II**

By the way, I've gotten to x^20 = x^a, but don't know what to do from here.
*September 29, 2015*

**Algebra II**

Hey all. I'm trying to solve this question, but don't really understand how to do it: If (x^4)^5 = x^a for all values of 'x', what is the value of 'a'? Any help is much appreciated, thanks!
*September 29, 2015*

**Math**

What is a counters to show a group that is greater
*September 29, 2015*

**Chemistry (check)**

Are the following names correct? CN- cyanide ion H2O dihydrogen monoxide ClO2 chlorite ClO4- perchlorate N2O dinitrogen monoxide GeF4 germanium tetrafluoride SO32- sulfite IF3 iodine trifluoride PO33- phosphite NH3 nitrogen dihydrogen ICl3 iodine trichloride SF4 sulfur ...
*September 29, 2015*

**math**

Jim's backyard is a rectangle that is 15 5/6 yards long and 10 2/5 yards wide. jim buys sod in pieces that are 1 1/3 yards wide. How many pieces of sod will Jim need to buy to cover his backyard with sod?
*September 29, 2015*

**what is the defination and example of ethics and m**

what comes to mind when you think of ethic or morality what is a example of a ethical belief and explain the the reason.
*September 29, 2015*

**Calculus 1**

f'(x) = 2x +2y + 2xdy/dx - 2ydy/dx + 1 = 0 2xdy/dx - 2ydy/dx = -2x - 2y -1 dy/dx = (-2x - 2y - 1)/ (2x - 2y) the tangent passes through (2,4) m = dy/dx = (-2(2) - 2(4) -1 ) ------------------ (2(2) - 2(4)) m = 13/4 the equation of the tangent line through (2,4); y = mx + c...
*September 29, 2015*

**maths**

compound interest, A = p (1 + (r/n) )^(nt) where p=pricipal, r=rate, n=number of compounding periods t=years A = 12800 ( 1 + (0.075/2))^2 A = 13778
*September 29, 2015*

**maths**

amount =14792 ci=1992
*September 29, 2015*

**Algebra**

How did you get 2/8's
*September 29, 2015*

**Algebra**

1\8(3d-2)=1/4(d+5)
*September 29, 2015*

**Chemistry**

TiCl4+2H2O=TiO2+4HCl
*September 29, 2015*

**Chemistry**

30g of TiCl4 is mixed with 18g of water to from TiO2 and HCl. Write the chemical reaction and balance it.How much TiO2 is produced. my answer: TiCl4+2H2O= TiO2+4HCl
*September 29, 2015*

**math help**

3x^2-6x-9 State the coordinates of the x-intercepts show work.
*September 29, 2015*

**General Chemistry**

An experiment calls for you to use 100 mL of 0.65 M HNO3 solution. All you have available is a bottle of 2.7 M HNO3. How many milliliters of the 2.7 M HNO3 solution do you need to prepare the desired solution?
*September 29, 2015*

**LA**

They are both used to look up things, and they are both sturdy resources to use. A dictionary is used to look up a definition, but a thesaurus is used to find the synonyms and the antonyms of a word
*September 29, 2015*

**english**

Concise language
*September 29, 2015*

**english**

thank you
*September 29, 2015*

**english**

concise language
*September 29, 2015*

**english**

consistency
*September 29, 2015*

**english**

Soap has existed since ancient times long ago? a. consistency b. parallelism c. concise language
*September 29, 2015*

**english**

No sir
*September 29, 2015*

**english**

which sentence is the best revision? a. My niece is a ballet dancer. b. My niece is a ballet dancer who performs both solo ballets and as a member of the ballet corps. c. My niece is a ballet dancer and I always enjoy attending performances.
*September 29, 2015*

**Calculus**

Find the antiderivatives. 1. f(x)= x sin (x^2) 2. f(x)= x sin x
*September 29, 2015*

**Indices**

Why am i using numbers 3and2. R is 8root2
*September 29, 2015*

**Indices**

The first one 4x2^3/2^3 =4
*September 29, 2015*

**Indices**

Acutally the second one as 4^3/2^4
*September 29, 2015*

**Indices**

Erm the first one?
*September 29, 2015*

**Indices**

P=(64)^-2 Q=1/16^(1/3) R=8root2 Express pqr as a power of 4 P=4^(-6) Q=4^(-2/3) R= ???????? How can i find R? *please show me the method for future reference* Thankyou
*September 29, 2015*

**physics**

draw the figure. right triangle, hypotenuse 10, opposite side 6. theta upstream=arcsin6/10
*September 29, 2015*

**Math**

the sum of the ages of rex, ben and alfred is 36 years, two years ago, ben was 3 times as old as rex was then, 8 years from now, alfred will be twice as old as ben will be then. find their present age.
*September 29, 2015*

**Science**

ayu
*September 28, 2015*

**Math**

5+2x=8
*September 28, 2015*

**Geometry**

Two lines are cut by a transversal such that a pair of alternate interior angles are right angles are the two lines parallel
*September 28, 2015*

**physics**

A block of mass M rests on a block of mass M1 = 5.00 kg which is on a tabletop. A light string passes over a frictionless peg and connects the blocks. The coefficient of kinetic friction mk at both surfaces equals 0.330. A force of 60.0 N pulls the upper block to the left and ...
*September 28, 2015*

**Writing**

I'm trying to make a list of the consequences of pollution. I know about public health and the environment. What else? Also, how can I relate pollution to politics?
*September 28, 2015*

**math**

Jeremy enlarged a picture.The length of the original picture is 8cm and the width is 5cm.The length of the enlarged picture is 10cm and the width is 7cm. A.What percent is the 10cm length of 8cm length? B.What is the area of each picture?By what percet is the area changed? Pls...
*September 28, 2015*

**Physics**

A small crack occurs at the base of a 13.5 m high dam. The effective crack area through which water leaves is 1.55 10-3 m2. (a) Ignoring viscous losses, what is the speed of water flowing through the crack?
*September 28, 2015*

**Physics**

A small crack occurs at the base of a 13.5 m high dam. The effective crack area through which water leaves is 1.55 10-3 m2. (a) Ignoring viscous losses, what is the speed of water flowing through the crack?
*September 28, 2015*

**Physics**

A small crack occurs at the base of a 13.5 m high dam. The effective crack area through which water leaves is 1.55 10-3 m2. (a) Ignoring viscous losses, what is the speed of water flowing through the crack?
*September 28, 2015*

**Chemistry**

1. Write 86,400 s in exponential notation. My answer: 8.6400 x 10^4 s 2. Write 0.15 ns using exponential notation with units of s. My answer: 0.15 x 10^-9 3. 141000 g =? kg My answer: 141 kg 4. Write 1.4 Mg using exponential notation with units of g. My answer: 1.4 x 10^6 g 5...
*September 28, 2015*

**pre-algebra**

-8-5y=12-9y
*September 28, 2015*