Thursday

November 26, 2015
Total # Posts: 88,338

**PHYSICS**

On a banked race track, the smallest circular path on which cars can move has a radius of 114 m, while the largest has a radius of 170 m, as the drawing illustrates. The height of the outer wall is 17.5 m. Find (a) the smallest and (b) the largest speed at which cars can move ...
*October 14, 2015*

**physics**

6. Calculate the gravitational force between you (weight: 140 lb) and your classmate (125 lb) sitting 20 inches apart on a bench. Answer must be in standard metric units. I dont want the answer can you just explain how to put it together and how do I add G Which is 6.67x10^-11
*October 14, 2015*

**Physics**

v=[r*g*tan(theta)]^.5 theta=height/(max radius - min radius) To solve for smallest speed, substitute min radius for "r" in velocity equation. To solve for largest speed, substitute max radius for "r" in velocity equation. Good luck! Greetings from UCF!
*October 14, 2015*

**Physics**

On a banked race track, the smallest circular path on which cars can move has a radius of 114 m, while the largest has a radius of 170 m, as the drawing illustrates. The height of the outer wall is 17.5 m. Find (a) the smallest and (b) the largest speed at which cars can move ...
*October 14, 2015*

**PHYSICS**

Car A uses tires for which the coefficient of static friction is 0.399 on a particular unbanked curve. The maximum speed at which the car can negotiate this curve is 10.4 m/s. Car B uses tires for which the coefficient of static friction is 0.831 on the same curve. What is ...
*October 14, 2015*

**Chemistry**

A 0.179 g sample of a vitamin C tablet was titrated with 0.1000 M NaOH according to the procedure in this experiment. The titration required 7.08 mL of NaOH solution. How many moles of NaOH were used in the titration? How Many moles of Vitamin C were in the sample? What was ...
*October 14, 2015*

**PHYSICS**

At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. People sit in seats facing the axis, their backs against the outer wall. At one instant the outer wall moves at a speed of 3.78 m/s, and an 63.5-kg person feels a 528-N ...
*October 14, 2015*

**Maths**

A polynomial g(x) is given by: g(x) = (x-1)(x+2)(x-a)(x-b) 1) Given that g(0)=4 show that ab=-2 2) given also that g(3)=40 show that a+b=1 3) given that a and b are integers, give possible values for a and b. Thank you
*October 14, 2015*

**Maths**

A polynomial g(x) is given by: g(x) = (x-1)(x+2)(x-a)(x-b) 1) given that a and b are integers, give the possible values for a and b. Thank you
*October 14, 2015*

**Maths**

Find the coefficient of x^2 in the following expansion. (you do not need to expand the brackets in full) (x-4)(x^3+x^2-2x-1) Thank you
*October 14, 2015*

**Maths**

Find the polynomial,P(x) such that x^3+x^2-13x+3 is identical to (x-3) P(x) Thankyou
*October 14, 2015*

**science**

Which variable in the following statement would be placed on the Y-axis of a graph? If the amount of light increases, then the plants will grow taller.
*October 14, 2015*

**english**

what sentence pattern is are there any more cookies in the jar
*October 14, 2015*

**chem**

A hot air balloon with a volume of 3.20 x 103 L and 120 moles of air is at a temperature of 25 °C. The air is heated to 65°C and 250 moles of air is added. What will the new volume of the balloon be?
*October 14, 2015*

**Algebra**

(1/2) b h = 65 bh = 130 But h = b+3 b(b+3)=130 b^2+3b-130=0 (b+13)(b-10)=0 b=10 test answer: (1/2)(10)(13)=65
*October 14, 2015*

**Math**

You make cards and sell them for $2.50 each. It costs $1.15 to print each card. You also pay $50 for supplies. How many cards must you sell to meet the cost for making the cards (you break even)? Round up to the next whole card. A. 20 cards B. 37 cards C. 20.46 cards D. 38 cards
*October 13, 2015*

**Ochem**

Could someone explain this? Thanks! Which of the following is a correct IUPAC name? a. 3-bromo-2-chlorotoluene b. 6-bromo-4-chlorotoluene c. 2-chloro-3-bromotoluene d. 2-chloro-4-bromotoluene
*October 13, 2015*

**Chemistry**

Acetone is an important chemical solvent and is used at homes as a nail polish remover. Chemical analysis shows that acetone is 62.0%C, 10.4%H, and 27.5%O by mass. A. Determine the empirical formula of acetone. B. In a separate experiment, the molecular mass is found to b 58.1...
*October 13, 2015*

**Social Studies( I REALLY NEED HELP!!!)**

Technological advances in agricultural allow early civilizations to develop and sustain themselves over long periods of time by providing new opportunities for growth in the communities. The advances allow the communities to feed more people and people sustain themselves by ...
*October 13, 2015*

**Simple Interest**

Quincy's property tax is $665 and is due on April 25. He does not pay until July 19. The county adds a penalty of 9.9% simple interest on unpaid tax. Find the penalty Quincy will pay. (Assume that there are 365 days in a year. Round to the nearest cent.) The penalty Quincy...
*October 13, 2015*

**Chemistry**

In March 2007 a number of pets were sickened or killed by pet food contaminated with the chemical melamine, which is used in the manufacture of certain plastics. It is thought that the melamine was added to make a pet food additive appear to have more protein than it really ...
*October 13, 2015*

**6 grade math**

20 + 15 =35
*October 13, 2015*

**math**

it is greater than 35 and less than 45 if you add the two digits the sum is 5 write the number word
*October 13, 2015*

**Chemistry**

A compound frequently used as a high-temperature lubricant has the formula MS2, where M represents some metallic element. If this compound is 40.06% sulfur by mass, what is the identity of the metal M? I'm confused on how to figure this out.
*October 13, 2015*

**Chemistry (Check)**

Nitrogen combines with oxygen to form a variety of compounds. One of these compounds is called nitrous oxide or "laughing gas." What is the formula of nitrous oxide if this compound is 63.65% N and 36.35%O by weight? I got N2O
*October 13, 2015*

**Global **

Question: What is the importance of institution on human prehistory? My work so far: DEFINITION: Institution: A long lasting pattern of organization in a community. My Question: What does the definition mean when it says "pattern of organization in a community"?
*October 13, 2015*

**math**

An ant weights about 2*10 to the fifth power pounds. There are about 1*10 to the 15 power ants on Earth. How many pounds of ants are on Earth
*October 13, 2015*

**math**

these marbles are placed in a bag and two of them are randomly drawn what is the probability of drawing two pink marbles if the first one is placed back in the bag before the second draw thebag has 10 marbles.2 yellow.3 pink.5 blue
*October 13, 2015*

**american government**

constitutional scholars have pointed out there is an inconsistency in justice marshall's opinion with respect with what the constitution specifically provided. whats the inconsistency?
*October 13, 2015*

**health**

i mean was that correct for sure?
*October 13, 2015*

**st Francis Methodist math**

26 200correct to 3 significant figures. What is the smallest possible number
*October 13, 2015*

**physics**

a stone is dropped from the top of a cliff. it is seen to hit the ground 3.5 seconds later. how high is the cliff
*October 13, 2015*

**Physics**

What are these angles?
*October 13, 2015*

**Algebra**

RICHARDS age in 15 years will be twice what it was 7 years ago. How old is richard
*October 13, 2015*

**chemistry**

A reaction mixture of 4.0 mL of 0.002 M SCN- and 5.0 mL of 0.002 M Fe3+ is diluted to 10.0 mL with 0.1 M HNO3 to form the blood-red FeNCS2+ complex. The equilibrium molar concentration of the FeNCS2+ determined from a standardization curve is 1.5x10^-4 mol/L. Calculate, in ...
*October 13, 2015*

**Math**

This is reasonable because $15.25 rounds to $20.00, and $4.85 rounds to $5.00. Added up, that would equal $25.00, which is pretty close to $20.00.
*October 12, 2015*

**Math**

How can Steve add 48+34 by making a ten what is the sum
*October 12, 2015*

**Physics**

A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +3.2. What is the magnification when the convex side is used as a mirror, the object remaining the same distance from the mirror? If the object is inverted, then enter...
*October 12, 2015*

**Physics**

An object is placed to the left of a lens, and a real image is formed to the right of the lens. The image is inverted relative to the object and is one-half the size of the object. The distance between the object and the image is 95 cm. (a) How far from the lens is the object...
*October 12, 2015*

**Physics**

Can anyone help me here? I have no idea where to start! Light in a vacuum is incident on a transparent glass slab. The angle of incidence is 35.1°. The slab is then immersed in a pool of liquid. When the angle of incidence for the light striking the slab is 21.1°, the ...
*October 12, 2015*

**History**

Which of the following would not be an example of a vectored disease? A. HIV/AIDS has ravished many people in Sub Sahara Africa B. Malaria has affected many people in Southeast Asia C. Yellow Fever has destroyed the lives of many people in the Caribbean D. Cancer has spread in...
*October 12, 2015*

**SS**

What does it mean for citizens to exercise political power?
*October 12, 2015*

**Louisiana History**

#. B??
*October 12, 2015*

**NON PROFIT ACCTNG**

Three accountants started talking about hospitals. One said he was treated at a not-for-profit hospital, another said she was treated at a county hospital, and the third said he had just returned from the hospital run by the U.S. Veterans Administration. They wondered why ...
*October 12, 2015*

**chemistry**

thanks haha it's a strange question to ask
*October 12, 2015*

**Maths**

Coordinate Geometry A=(7,4) B=(2,0) Gradient of AB = 4/5 Equation of AB in ax+by=0 for is 4x-5y-8=0. The length of AB in surd form is root41. The point C has coordinates (2,t), where t>0 and AC=AB. a) find the value of t. b) without plotting point, find the area of triangle...
*October 12, 2015*

**PHYSICS**

A car travels at a constant speed around a circular track whose radius is 2.82 km. The car goes once around the track in 364 s. What is the magnitude of the centripetal acceleration of the car?
*October 12, 2015*

**anonymous**

In a class 80% students passed in sst ,85% in math ;75%in both subjects .if 40%students failed in both subjects .tell total number of students
*October 12, 2015*

**Accounting**

fifo $1280; LIFO $960
*October 12, 2015*

**Accounting**

,,,,
*October 12, 2015*

**present and past perticiple**

drive
*October 12, 2015*

**Chemistry**

Suppose that atomic masses were based on the assignment of a mass of 12.000 g to 1 mol of carbon, rather than 1 mol of ^12C. What would the atomic mass of oxygen be? (The atomic masses of carbon and oxygen based on the assignment of 12.000 g to 1 mol of ^12C are 12.011 amu and...
*October 11, 2015*

**HELP HELP AP BIOLOGY**

A. Explain the term "concentration gradient". Make sure to discuss the difference between a solution's concentration and a concentration gradient. B. An artificial cell contains 0.2 M FRUCTOSE and 0.8 M glucose, AND 2M SUCROSE. It is placed into a solution ...
*October 11, 2015*

**Chemistry**

Neutron stars are composed of solid nuclear matter, primarily neutrons. Assume the radius of a neutron is approx. 1.0 x 10^-13 cm. Calculate the density of a neutron. [Hint: For a sphere V=(4/3) pi r^3. Assuming that a neutron star has the same density as a neutron, calculate ...
*October 11, 2015*

**Chemistry**

An alpha particle, ^4 He^2+, has a mass of 4.00151 amu. Find the value of its charge-to-mass ratio in C/kg.
*October 11, 2015*

**math**

a flower bed is in the shape of a triangle with one side twice the length of the shortest side, and the third side is 11 feet mre then the length of the shortest side. find the dimmenstions if the perimter is 163feet
*October 11, 2015*

**Finance**

Consider the following income statement and answer the questions that follow: Sales (100 units) $200 Variable costs ($.80 ea) 80 Fixed Costs 20 EBIT 100 Interest Expense 30 EBT 70 Income tax 24 Net Income 46 a. What is the firm’s Breakeven Point in units? b. Draw a ...
*October 11, 2015*

**Physics**

jhfuyj
*October 11, 2015*

**government**

What does it mean to "get on the ballot" and how does one do so?
*October 11, 2015*

**Organic**

since alanine is on the far left side, it is considered the n-terminal amino acid. phe. would be the c-terminal amino acid.
*October 11, 2015*

**finance**

initial deposit 4100 annual interest rate 8% inflation 3% 30 years
*October 11, 2015*

**algebra**

A chemistry lab wants to prepare 300 liters of 25% acid solution. In stock he has 20% and 35% acid solutions. How many liters of each in stock mixture should he mix tp prepare a 300-liter mixture?
*October 11, 2015*

**math**

0.015 N
*October 11, 2015*

**Chemistry**

Why does the height of the precipitate of strontium nitrate and sodium carbonate go up as the volume of strontium nitrate increase?
*October 11, 2015*

**math**

A photograph has been enlarged to three times its previous size. By what percentage has the size of the photograph increased?
*October 11, 2015*

**business**

compare and contrast Rational (formal) model for strategy- emergent strategy
*October 11, 2015*

**english**

which is correct passive voice why was a lie told by you? By why was a lie told by you.
*October 11, 2015*

**english**

Change into passive voice? why did you tell a lie
*October 11, 2015*

**Chemistry**

Hey it's me again, I forgot to type that the "Sucrose is nonvolatile,nionaizing solute in water" and the answer to it was 0.571 but what is the solution or how was that the answer? Please help me :)
*October 11, 2015*

**Chemistry**

determine the vapor pressure lowering at 27 C of a solution of 750g of sucrose, dissolved in 180g of water. The vapor pressure of pure water at 27 C is 26.7 torr. Assume the solution is ideal
*October 11, 2015*

**Math**

Are 5^2+10^2-2*5*10 cos50° and 5^2+10^2-2*5*10 cos130° equal to 7.8 and 13.7?
*October 11, 2015*

**Chemsitry**

A mixture of 10.00 mL of H2SO4 and 30.00 mL of HCl required 20.00 mL of 2.500 M NaOH for complete reaction. When 30.00 mL of H2SO4 and 10.00 mL of HCl were used, 28.00 mL of 2.500 M NaOH were required. What were the concentrations of the acids? [Both were 1.000 M] H2SO4(aq) + ...
*October 11, 2015*

**Chemistry**

A 2.00 g impure sample of MgO (molar mass 40.3 grams) was completely dissolved in 50.0 mL of 1.000 M H2SO4. The excess acid was back-titrated with 25.0 mL of 0.800 M NaOH. Calculate the percent purity of the MgO sample. [80.6 %] MgO(s) + H2SO4(aq) MgSO4(aq) + H2O(l)
*October 11, 2015*

**physics**

R=pL/A R is resistance P is resistivity L is length A is area
*October 10, 2015*

**Msth**

Number 1 should say variable
*October 10, 2015*

**maths**

what is 1/50 x length of new garage?
*October 10, 2015*

**Math**

A parallelogram has an angle of 50 degs and sides of 5 and 10 inches. What are the lengths of the diagonals? Round each to the nearest tenth of an inch.
*October 10, 2015*

**Chemistry**

* From your hint, I arrived at an answer of 3.46 x 10^4 but the answer key says 3.11 x 10^5 Ib. A backyard swimming pool holds 185 cubic yards (yd^3) of water. What is the mass of the water in pounds? DrBob222: 185 yd^3 x (3 ft/yd) x (3 ft/yd) x *3 ft/yd) = ? cubic feet. ...
*October 10, 2015*

**Chemistry**

The single proton that forms the nucleus of the hydrogen atom has a radius of approximately 1.0 x 10^-13 cm. The hydrogen atom itself has a radius of approximately 52.9 pm. What fraction of the space within the atom is occupied by the nucleus.
*October 10, 2015*

**Chemistry**

A backyard swimming pool holds 185 cubic yards (yd^3) of water. What is the mass of the water in pounds?
*October 10, 2015*

**physics**

when starting a foot race a 66 kg sprinter exerts an average force of 640 N backward on the ground for 0.85s. What is his final speed in m/s?
*October 9, 2015*

**math**

thank you is the equation going to be x+9+3x+9=78
*October 9, 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 ...
*October 9, 2015*

**Math**

Skyler is 2 years older than Sonya. In 9 years the sum of their ages will be 50. How old is Sonya now? (A) Translate the given information into an equation using the variable x = current age of Sonya. Simplify the left side of your equation. _____________ = 50 (B) How old is ...
*October 9, 2015*

**bio**

During lab, you are provided with a stock antibody solution (Ab) that has a concentration of 400 μg/μl (Tube 1). It is necessary make the following dilutions.
*October 9, 2015*

**History**

Differences in Similarities between Sweden, Malaysia, and India
*October 9, 2015*

**chemistry**

If 3.15 mL of vinegar needs 42.5 mL of 0.115 M NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.40 qt sample of this vinegar?
*October 9, 2015*

**Maths**

Line L1 has equation 2x -3y+12=0 Gradient of L1 is 2/3x The line L1 crosses the x axis at the point A and the y axis at the point B. The line L2 is perpendicular to L1 and passes through B. A) find and equation of L2 The line L2 crosses the x axis at the point C B) find the ...
*October 9, 2015*

**Maths**

Determine the values of K such that the quadratic equation x^2 + 2Kx - 3K =0 has equal roots Thankyou
*October 9, 2015*

**Algebra**

Molly left home and drove toward the ferry office at an average speed of 27 mph. Mark left two hours later and drove in the same direction but with an average speed of 45 mph. How long did Molly drive before Mark caught up? I am terrible at word problems and this is a review ...
*October 9, 2015*

**Math**

Taiti drank 3/4 glass of orange juice, 1/8 glass of prune juice, and 1/2 glass of milk. How much did she drink all together?
*October 9, 2015*

**statisciscal inference**

The probability that a patient recovers from a delicate heart operation is .0.9. What is the probability that exactly 5 of the next 7 patient having this operation survive?
*October 9, 2015*

**Biology **

I put them in order, but am not sure. Please take a look? Question: Put the following events of the adaptive immune response in the order they occur. (c) You cut yourself and bacteria enter the wound. (f) A dendrite near the cut phagocytizes some bacteria and uses MHC proteins...
*October 9, 2015*

**Microbiology**

Which of the following molecules do you think would make good antigens for recognizing a pathogen? You may choose more than one. 1) a cell wall protein 2) a piece of DNA inside a cell 3) a protein that is part of a flagella 4) a uniquely shaped protein that is part of a virus ...
*October 9, 2015*

**math**

I am trying to get this answer too
*October 9, 2015*

**prasanna high school**

Subject:maths. question: the sum of first 6terms.of an aritmetic progression is 6.the product of 2nd term & 5th term is -80 find the terms of A.P.
*October 9, 2015*

**Maths**

Write in completed square form -x^2 - 3x + 7
*October 9, 2015*

**umuc**

For the reaction HCONH2(g) NH3(g) + CO(g), Kc = 4.84 at 400 K. If ΔH° for this reaction is 29 kJ/mol, find Kc at 500 K.
*October 9, 2015*

**maths **

The sum of first 6 terms of an Arithmetic progression is 6 the product of 2nd term and 5th term is -80 . Find the terms of A.P.
*October 8, 2015*