# l

Most popular questions and responses by l-
## Precal, please help asap!

How many solutions does a triangle with values a = 42, A = 117 degrees, and b = 34 have

*asked on May 28, 2014* -
## Chemistry

Complete and balance the molecular equation, including phases, for the reaction of aqueous iron(III) nitrate, Fe(NO3)3 and aqueous lithium hydroxide, LiOH Enter the balanced net ionic equation, including phases, for this reaction.

*asked on March 5, 2015* -
## English

1. Choose the answer that best matches the word in italics. Samantha tried to look IMPASSIVE when they announced her essay as a finalist in the competition. (1 point) surprised*** unemotional unsure vibrant 2. Choose the answer that best matches the

*asked on September 28, 2016* -
## Chemistry

The Kp for the following equilibrium system is 4.31 x 10‒4 at 375°C : N2(g) + 3H2(g) ↔ 2NH3(g). If 0.862 atm of N2 and 0.373 atm of H2 were mixed in a constant-volume flask and heated to 375°C, which of the following would be closest to the

*asked on April 26, 2012* -
## Chemistry

Complete the following acid-base reaction with balanced molecular, total ionic and net ionic equations: calcium hydroxide (aq) + acetic acid (aq) ----> ? I know that calcium hydroxide is ca(OH)2 and that acetic acid is CH3COOH. I also know that one of the

*asked on November 2, 2009* -
## Chemistry

What is the concentration of the resulting solution when 250 mL of 0.1 M K3PO4 and 300 ml of 0.5 M K3PO4 are mixed?

*asked on June 10, 2013* -
## Physics

In the figure below, the CG of the pole held by the pole vaulter is 1.54 m from the left hand, and the hands are 0.653 m apart. (Assume the vaulting pole has a mass of 3.72 kg.) -Calculate the force (in N) exerted by his right hand. (Enter the magnitude.)

*asked on October 31, 2017* -
## Chemistry

To what pH should you adjust a standard hydrogen electrode to get an electrode potential of -0.122 V ? (Assume that the partial pressure of hydrogen gas remains at 1 atm.)

*asked on November 21, 2016* -
## Precal, TRUE OR FALSE

TRUE OR FALSE The motion of a pendulum for which the maximum displacement from equilibrium varies is an example of simple harmonic motion.

*asked on May 28, 2014* -
## chemistry

When surface water dissolves carbon dioxide, carbonic acid (H2CO3) is formed. When the water moves underground through limestone formations, the limestone dissolves and caves are sometimes produced. CaCO3(s) + H2CO3(aq) Ca(HCO3)2(aq) What mass of limestone

*asked on February 6, 2010* -
## physics

A solid uniform 45.0 kg ball of diameter 32.0 cm is supported against a vertical frictionless wall using a thin 30 cm wire of negligible mass. (a) make a free body diagram for the ball and use it to find the tension in the wire and (b) how hard does the

*asked on June 11, 2010* -
## PRECAL MULTIPLE CHOICE

If a triangle ABC has A = 52 degrees, side a = 178, and side b = 234, then what is the measure of B? B= 62.3 or 117.7 B = 62.3 B = 117.7 there is no solution

*asked on May 28, 2014* -
## world history

Which of the following statements is true of the Gulf of Tonkin affair? A. Johnson told Congress to pass the Gulf of Tonkin Resolution to let him expand the war. B. Congress was divided and only reluctantly passed the Gulf of Tonkin Resolution. C. The

*asked on July 30, 2014* -
## Precal, please help asap!

The angles of elevation theta and alpha to an airplane from the airport control tower and from an observation post 2 miles away are being continuously monitored. If theta is 42 degrees when alpha is 81 degrees, how far is the plane from the observation

*asked on May 26, 2014* -
## Physics

An object is thrown vertically upward at 18m/s from a window and hits the ground 1.6s later. What is the height of the window above the ground?(air resistance is negligible)

*asked on December 29, 2012* -
## Physics

A toy car mass 0.05 kg ,on a ramp with no friction , begins at 0.7 meters high. At the bottom it collides inelastically with a toy truck mass 0.2 kg, at rest. After the collision the car is at rest, what is the final velocity of the truck?

*asked on October 26, 2017* -
## College Physics

A 50 dB sound wave strikes an eardrum whose area is 5.0 x 10^-5 m^2. A.)How much energy is absorbed by the eardrum per second? B.) At this rate, how long would it take your eardrum to receive a total energy of 1.0 Joule?

*asked on May 6, 2010* -
## Chemistry

Predict the product(s) and write a balanced equation for the following redox reaction: pentane (C5H12) + oxygen ---->

*asked on November 6, 2009* -
## Math

Find the Maximum area for the given perimeter of a rectangle. State the length and width of the rectangle. 28 inches Well, finally a calculus problem. Ok, we know that the area for a rectangle is A=l*w and the perimeter is P=2(l+w) In this problem P= 28,

*asked on August 31, 2006* -
## Physics

a toy car of mass 0.01 kg, gets into an elastic collision with a toy train mass 0.35 kg. if the train is at rest and the car is moving at 2 m/s initially. how fast is the train moving after the collision? Use the equation ((2*m)/(m+t))*v

*asked on November 1, 2017* -
## Chemistry

In the equilibrium system CH3COOH(aq) + H2O(l) —> — H3O+ CH3COO-(aq) .

*asked on January 21, 2018* -
## Chemistry

if NaCl is added to this equation: [Co(OH2)6]2+ + 4 Cl- + heat ->(supposed to be double arrow) [CoCl4]2- + 6 H2O would the equilibrium shift right or left? also same question for the addition of AgNO3.

*asked on April 15, 2009* -
## physics

A (10.25) kg bowling ball is hung on a (11.50) m long rope. It is then pulled back until the rope makes an angle of (39.0) degrees with the vertical and released. Find the speed of the ball is at the lowest point. Give your answer in m/s and with 3

*asked on February 25, 2017* -
## Finance

Here is a forecast of sales by National Bromide for the first 4 months of 2012 (figures in thousands of dollars): Month: 1 2 3 4 Cash sales 19 28 22 18 Sales-on-crdt 140 160 130 110 On average, 40% of credit sales are paid for in the current month, 20% in

*asked on October 10, 2012* -
## Physics

A baseball pitcher throws the ball in a motion where there is rotation of the forearm about the elbow joint as well as other movements. If the linear velocity of the ball relative to the elbow joint is 15.0 m/s at a distance of 0.410 m from the joint and

*asked on November 8, 2017* -
## math

Write two expressions that show that increasing a quantity by 4% is the same as multiplying that quantity by 1.04.

*asked on December 5, 2012* -
## History

The new morals and manners of the 1920s were reflected in A. women's fashion B. the great migration C. the new factory jobs D. Politics Americans responded to the Selective Service Act A. with enthusiasm B. with antiwar riots C. by refusing to register D.

*asked on May 7, 2012* -
## Physics

A satellite experiences a gravitational force of 228 N at an altitude of 4.0xE7 m above Earth. What is the mass of this satellite ?

*asked on June 14, 2016* -
## Chemistry

What volume (in milliliters) of 0.170 M NaOH should be added to a 0.140 L solution of 0.021 M glycine hydrochloride (pKa1 = 2.350, pKa2 = 9.778) to adjust the pH to 2.84? I tried using the Henderson- Hasselbalch equation but I am confused about what to do

*asked on February 28, 2016* -
## Precal

Can someone please help me with the last 4 questions in this paragraph? Suppose that Tiger hit a golf ball with an initial velocity of 150 ft/sec at an angle of elevation of 30°. Write the parametric equations to represent the flight of the ball. How long

*asked on May 26, 2014* -
## chemistry

Explain why using a Büchner funnel with vacuum to filter hot fluid will result in clogging. What is the result of reduced pressure on a hot volatile solvent? How does this affect the amount of solute that is dissolved? Where would the funnel become

*asked on September 30, 2015* -
## BRAINTEASERS

T NO PLH I A SWAA I found the answer by Googling "t no plh" Apparently, someone else posted the same question on a puzzles forum website. To no Please Help I Am SWAAT

*asked on September 20, 2006* -
## chemistry

How can you tell which mobile phase is more polar in TLC? (hexane/ethyl acetate/ethanol vs. isopropanol/ammonia)? the hexane/ethyl acetate/ethanol travelled up the TLC faster, does this make it more polar?

*asked on September 28, 2009* -
## precal help asap

If a triangle ABC has A = 52 degrees, side a = 178, and side b = 234, then what is the measure of B?

*asked on May 28, 2014* -
## Chemistry

So the Ksp for silver chloride is 1.8*10^-10, how could I find the concentration of silver ions in this saturated solution. Then how I find the total ion concentration? AgCl ==> Ag^+ + Cl^- Let AgCl solubility is x. Then (Ag^+) is x and (Cl^-) is x Ksp =

*asked on May 17, 2007* -
## Statistics

a sample of n=25 scores has a mean of M=65 and an estimated standard error of 2 points. What is the sample variance

*asked on June 22, 2016* -
## Physics

a toy car of mass 0.01 kg, gets into an elastic collision with a toy train mass 0.35 kg. if the train is at rest and the car is moving at 2 m/s initially. how fast is the train moving after the collision?

*asked on October 30, 2017* -
## Calc

The region bounded by y=2.5x^2 and y=4x is to be rotated about both axes and the volume generated calculated by both the washer and the shell methods. 1)The volume of the region bounded by y=2.5x^2 and y=4x, when rotated about the x-axis is? 2) The volume

*asked on September 16, 2012* -
## business math

Mel’s Furniture received an invoice dated September 27 for five bedroom sets at $3,000 each. The invoice indicated a trade discount of 5/8/3. The seller of the furniture prepaid the freight of $200. Terms were 2/10 EOM. Assuming Mel pays on November 2,

*asked on December 27, 2011* -
## Physics

Which method of sliding a block of ice requires less force—(a) pushing or (b) pulling at the same angle above the horizontal?

*asked on October 8, 2014* -
## Environmental

Is there an effective way for coal-fired plants to effectively dispose of used scrubber solution after wet scrubbing?

*asked on March 5, 2019* -
## physics

Written in scientific notation, with three significant digits, the number 0.01050 is_______?______ x 10?

*asked on July 31, 2014* -
## math

Events A and B are dependent events. The probability that event A occurs is 20%. The probability that events A and B both occur is 8%. What is the probability that event B occurs given that event A occurs? Explain how you found your answer.

*asked on June 9, 2017* -
## Finance

Juan and Rachel Burpo plan to buy a time-share in six years of $16,860. In order to have adequate funds to do so, the Burpo want to make a deposit to their money market fund today. Assume that they will be able to earn an investment rate of 5.75%,

*asked on February 7, 2016* -
## Chemistry

A bug is observed to travel 72 cm in 7.5 seconds. What is the bug's speed in miles per hour?

*asked on September 11, 2012* -
## College Physics

A raft is made of wood with a density of 404 kg/m^3. It is 42 cm thick and its square area is 3.0x3.0 m^2. It is floating in seawater (density = 1025 kg/m^3). How many people of 68 kilogram can the raft hold before they start getting their feet wet?

*asked on April 19, 2010* -
## Chemistry

Elemental sulfur occurs as octatomic molecules, S8. What mass of fluorine gas is needed to react completely with 19.0g of sulfur to form sulfur hexafluoride?

*asked on October 20, 2009* -
## Chemistry

Gunpowder is a mixture of potassium nitrate, sulfur and carbon in the proportion by mass of 6:1:1 (KNO3:S:C). A typical rifle shell contains 3.0g of gunpowder. How many moles of each component are there in our sample of gunpowder?

*asked on October 20, 2009* -
## chemistry

Radioactive materials are often used in biological studies. A radiation biologist studies the rate of decomposition of a certain substance and obtains the following data: Time(days) 0 4.0 8.0 12.0 16.0 Mass (μg) 15.50 10.90 7.67 5.39 3.79 Determine the

*asked on February 4, 2012* -
## chemistry

What is the equilibrium constant "Kp" at 200 C for the reaction below: P4(s) + 6 Cl2(g) -->

*asked on July 20, 2011* -
## DBQ Essay

How long does the thesis usually have to be? Will 4 sentences suffice?

*asked on October 19, 2008* -
## MATH

Write a mathematical sentence to compare each pair of measures. GB and GF Please help. I don't understand. I don't understand either. You'll need to supply more details. Ordinarily, a measure is any function that assigns non-negative values to objects,

*asked on September 4, 2006* -
## Physics

A 620 kg satellite orbits the earth where the acceleration due to gravity is 0.233 m/s^2. What is the kinetic energy of this orbiting satellite?

*asked on June 14, 2016* -
## Math-unit rate

Molly walks 1 1/2 miles in 3/5 hour. What is the walking rate?

*asked on August 19, 2015* -
## Algebra

Remove the parentheses from the following expression, and combine like terms: (2x + 3y – 4z) – (x – y – z) A.3x +4y+5z B. 3x + 4y – 3z C.x +4y–3z D. x + 2y – 5z

*asked on November 15, 2013* -
## Math/Algebra

Please help me with this, below is a question I have to answer…below that is my answer…did I do, or answer this correctly? Post a response of at least 50 words to the following: Explain how to graph linear equations using the x- and y-intercepts.

*asked on December 2, 2009* -
## Accounting

During its first year of operations, Maria Rose set up Roseland Inc. and invested $25,000 in the corporation. The company earned $68,000 of revenues and incurred $32,000 of expenses. At the end of the year, the company owed $24,000 to its creditors. A cash

*asked on July 13, 2014* -
## Microeconomics

For a downward-sloping demand curve, marginal revenue decreases as quantity sold increases. True or False?

*asked on April 6, 2010* -
## Chemistry

A 500.0-mL sodium iodide (NaI) solution was prepared by dissolving 37.7g of solid NaI in water. Chlorine gas was bubbled through a 100.0-mL sample of this solution until the reaction was complete. How many grams of molecular iodine were produced?

*asked on November 6, 2009* -
## math

what is 72.5 divided by 1.25

*asked on October 8, 2009* -
## physics

Starting from rest, a student pulls a (34) kg box a distance of (13.50) m across the floor using a (161) N force applied at 35.0 degrees above horizontal. The coefficient of kinetic friction is 0.220 between the floor and the box. Find the work done by the

*asked on February 21, 2017* -
## Math

In the triangle ABC given, side AB is twice as long as side AC. We have: m

*asked on June 13, 2016* -
## math

the green paint jar is 4/8 full. The purple paint jar is 4/6 full. Which paint jar is less full?

*asked on February 22, 2016* -
## algebra

What is the first step you should take to solve the following expression: 2 – 16 ÷ 4 × (3 + 2)2 + 1 ? A. 16 ÷ 4 B. 2 – 16 C. 3 + 2 D. 22

*asked on November 15, 2013* -
## Maths-Trigonometry

a kite is attached to a string that is 15m long. If the string makes an angle of 26 degrees to the horizontal the height of the kite is.

*asked on July 28, 2012* -
## College Physics**

A student goes to planet x and wants to determine the gravity there. The student knows from physics lab that they can use Atwood's machine to determine gravity. The student places a 100g mass and a 110g mass at the end of a string and hangs it over a

*asked on March 9, 2010* -
## Chem

How many moles of ions are released when this sample is dissolved in water? 3.55*10^18 formula units of Ba(OH)2*8H2O? So far I know to divide this by avogadro's number (/6.022*10^23) which equals .590*10^-5 mol. Don't know what to do from here. Please

*asked on November 6, 2009* -
## chemistry

How can you tell which mobile phase is more polar in TLC? (hexane/ethyl acetate/ethanol vs. isopropanol/ammonia)? the hexane/ethyl acetate/ethanol travelled up the TLC faster, does this make it more polar? The TLC is silica gel!

*asked on September 28, 2009* -
## physics

A student pulls a (34) kg box a distance of (13.50) m up a ramp set at 25.8o using a force of (181) N applied parallel to the ramp. Find the efficiency of the ramp. Give your answer in percent (%) and with 3 significant figures.

*asked on March 2, 2017* -
## MATH

WRITE A WORD PROBLEM FOR THE EQUATION 12N-45=504.

*asked on May 16, 2015* -
## Physics

An object that starts from rest completes 7 revs in 3 seconds. What is angular accel. in rad/s2?

*asked on October 4, 2014* -
## physics

A snail moved 0.14 m between two cabbages in 3.0 minutes. The average speed of the snail is

*asked on July 31, 2014* -
## Precal

A distress flare is shot straight up from a ship’s bridge 75 ft above the water with an initial velocity of 76 ft/sec. a) Write a set of parametric equations for the path of the flare. ______________________________ ______________________________ What

*asked on May 26, 2014* -
## chemistry

What is the pressure change for the reaction below at 25 C in the process of reaching equilibrium if there is initially enough ammonium hydrogen sulfide to reach equilibrium? Kp= 4.0*(10^4) NH3(g)+H2S(g) --->

*asked on July 20, 2011* -
## Calculus - integration

Integral of (2x+5sin(x))^2 dx i didn't know how to start this question so i expand the squre first and then did the rest but its wrong and i don't think my method is right. thank you.

*asked on November 2, 2010* -
## economics

if the government gives $1,000 of food stamps to a poor family,will the family now have $1,000 more food than before?

*asked on April 21, 2010* -
## physics

A 22.0 kg box is sliding down on an incline set at (44) degrees up from horizontal. The coefficient of kinetic friction between the box and the incline is (.27). Find the acceleration of the box. Give your answer in m/s2 and with 3 significant figures.

*asked on February 21, 2017* -
## precal help asap

solutions to the equation tan^2x - 3 = 0 ( there can be more than one) 2pi/3 pi -pi/3 5pi/3

*asked on May 28, 2014* -
## calculus

The number N of bacteria in a culture is given by the model N=250e^kt where t is the time (in hours). If N=280 when t=10 estimate the time for the population to double in size.

*asked on December 20, 2010* -
## Precalc

The number N of bacteria in a culture is given by the model N=250e^kt where t is the time (in hours). If N=280 when t=10 estimate the time for the population to double in size.

*asked on December 20, 2010* -
## psy

I was asked to define independant and dependant variables without defing, but buy using an example...would this be one...two digging dogs, one never corrected for digging(IV) and one corrected by a loud noise(DV), or would that be classical conditioning?

*asked on August 30, 2010* -
## college algebra

an inlet pipe can fill a large water tank in 3 hours. an outlet pipe can empty the same tank in 5 hours. given an empty tank, at 8pm, activate both pipes. what time on the clock will it be before the tank is completely filled?

*asked on September 30, 2009* -
## math

The only perfect number of the form x^n + y^n

*asked on October 28, 2007* -
## World HIstory

Is iceland part of the British Isles? No, just Great Britian and Ireland are part of the British isles. oops. I meant Ireland instead of iceland. Thanks though. It asnwered my question !

*asked on September 3, 2006* -
## M

Find an equation of the linear function f having a slope of -2 if f(1)=3. My teacher never taught us this, please help.

*asked on September 17, 2014* -
## Math 4th grade

9,924 9 is the underline digit round each digit... I think it's 10,000

*asked on September 8, 2014* -
## physics

A bus traveled 10.0 km from the north end of the city to the south in 10.0 minutes. The average speed of the bus was

*asked on July 31, 2014* -
## Physics

A wheel with a weight of 395N comes off a moving truck and rolls without slipping along a highway. At the bottom of a hill it is rotating at an angular velocity of 23.0rad/s . The radius of the wheel is 0.607m and its moment of inertia about its rotation

*asked on April 11, 2014* -
## algebra

In a class of 50 students, the number of women is 2 more than five times the number of men. How many women are in the class?

*asked on March 19, 2013* -
## math

juanita planted 2 flower gardens in similar square shapes. what are the measures of all the angles in each garden? explain how you know.

*asked on January 3, 2012* -
## pressure change

What is the pressure change for the reaction below at 25 C in the process of reaching equilibrium if there is initially enough ammonium hydrogen sulfide to reach equilibrium? Kp= 4.0*(10^4) NH3(g)+H2S(g) --->

*asked on July 20, 2011* -
## calculus

f(x)=x^2-3x+1/x^2

*asked on February 17, 2011* -
## Calculus - integration

Q. ¡ò(15^x/3^x) dx i know that the ¡ò(a^x) dx = a^x/lna +c but i don't know how to solve this question. thank you

*asked on November 1, 2010* -
## economics

which of the following are government purchases of goods and services and which are government transfer payments?a.the apollo,b.subsidy to agriculture and industry,c.social security,d.salary received by federal employee,e.unemployment benefits paid to a

*asked on April 22, 2010* -
## economics

in the nation of mortorania,taxpayer A earns $40,000 and pays $40,000 in taxes while taxpayer B earns $80,000 and pays 6,000 in taxes.is the tax system of mortorania progressive, proportional (flat), or regressive?

*asked on April 22, 2010* -
## Chemistry

A 3.26g sample of metallic sodium is added to 200mL of water. How many moles of NaOH are produced?

*asked on November 2, 2009* -
## physics

block of dry ice resting on a table is given a brief push. a moment later, which of the following forces act on the block?

*asked on October 20, 2009* -
## Social 30

So I have to write an essay test on this question: "To what extent should political decision-making be restricted to a specific group in society?" I'm having a lot of trouble on what to say, I'm terrible at essay writing, so if someone could help that

*asked on October 11, 2006* -
## math

Suppose the area of a rectangle is 36 square inches. Find the Minimum perimeter for a rectangle with this area. Please help asap. Thank you! (so much) We know that A=l*w=36 and P=2(l+w) From the area formula we see that l=36/w Putting this into the

*asked on August 31, 2006* -
## math

Pete recently bought whiteboard supplies for employees in his office. He spent $140 on whiteboards, markers, and erasers. The markers came in packs of 5, which cost $6 per pack. One (1) eraser was 1/3 of the cost of 1 pack of markers and 1 whiteboard was 5

*asked on May 17, 2018*

## Pages

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