# dEE

Most popular questions and responses by dEE-
## physics

An object with mass m1=5.00 kg rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2= 10.0 kg. Find the acceleration of each object and the tension in the cable.

*asked on September 26, 2011* -
## physics

The weight of an object is the same on two different planets. The mass of planet A is only forty-five percent that of planet B. Find the ratio rA/rB of the radii of the planets.

*asked on February 7, 2013* -
## Cal 1

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) (1 + 2x)^1/4 ≈ 1 + 1/2x

*asked on March 7, 2013* -
## Chemistry

Imagine two solutions with the same concentration and the same boiling point.? Imagine two solutions with the same concentration and the same boiling point, but one has ethanol as the solvent and the other has carbon tetrachloride as the solvent. Determine

*asked on March 2, 2013* -
## BUS math

Bari Jay a gown manufacturer received an order for 600 prom dresses from China. Her cost is $35 a gown. If her markup based on selling price is 79%, what is the selling price of each gown? Round to the nearest cent.

*asked on March 31, 2015* -
## chemistry

Gaseous methane CH4 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O . Suppose 0.481 g of methane is mixed with 2.9 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the

*asked on October 3, 2014* -
## Physics

The coefficient of static friction between the 3.00 kg crate and the 35.0 degree incline is .300. What minimum force must be applied to the crate from sliding down the incline?

*asked on September 28, 2011* -
## History

Question 1 In the late nineteenth and early twentieth centuries, European nations formed alliances in order to __________. keep peace on the continent

*asked on November 13, 2015* -
## Physics

Gas is confined in a tank at a pressure of 11 ATM and a temperature of 25 degree Celsius. If 2/3 of the gas is withdrawn and the temperature is raised to 75 degree Celsius, what is the new pressure in the tank?

*asked on November 26, 2011* -
## Physics

Two curves on a highway have the same radii. However, one is unbanked and the other is banked at an angle θ. A car can safely travel along the unbanked curve at a maximum speed v0 under conditions when the coefficient of static friction between the tires

*asked on March 4, 2013* -
## History

12. What effect did technology have on World War I? It enabled nations to defeat their enemies with few casualties. It greatly increased the number of casualties.

*asked on November 13, 2015* -
## Chemistry

Explain, in terms of electronegativity, why an H-F bond is expected to be more polar than an H-I bond.

*asked on January 4, 2011* -
## Physics

During volcanic eruptions, chunks of solid rock can be blasted out of the volcano; these projectiles are called volcanic bombs. (a) At what initial speed would a bomb have to be ejected, at angle 35degrees to the horizontal, from the vent at A in order to

*asked on December 28, 2015* -
## Chemistry

A buffer solution is prepared by mixing 50.0 mL of 0.300 M NH3 with 50 mL of 0.300 NH4Cl. The pKb of NH3 is 4.74. NH3 + H2O-> NH4+ +OH- 7.50 mL of 0.125 M HCl is added to the 100 mL of the buffer solution. Calculate the concentration of NH3 and NH4Cl for

*asked on April 10, 2014* -
## Math

Bill paints murals. He recorded the total amount of white paint that he used for his murals each month in the table below. In April Bill used 2/3 of the amount that housed in May. Fill in the amount of white paint BIll used in April in the table below.

*asked on April 1, 2017* -
## math

find the image (0,0) after two reflections first across y=3 and then across X-axis

*asked on September 18, 2016* -
## math

Anita's, a fast-food chain specializing in hot dogs and garlic fries, keeps track of the proportion of its customers who decide to eat in the restaurant (as opposed to ordering the food "to go"), so it can make decisions regarding the possible construction

*asked on June 11, 2017* -
## chemistry

A major component of gasoline is octane (C8H18). When octane is burned in air it chemically reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). What mass of oxygen gas is consumed by the reaction of 8.17g of octane?.

*asked on December 4, 2016* -
## math

The base of a solid is the region bounded by the parabola x^2 = 8y and y=4. Each cross section perpendicular to the y-axis is an equilateral triangle. Find the volume.

*asked on March 12, 2016* -
## English

What best describes Emily Dickinson's attitude towards death? A.sentimental B.angry C.accepting

*asked on November 19, 2015* -
## English

In terms of style and technique, "Old Ironsides" is __________. distinctive and unique similar to many European poems

*asked on October 30, 2015* -
## Math/ Proportions solve using unit rates

Contestants in a dance-a-thon rest for the same amount of time every hour. A couple rests for 25 minutes in 5 hours. How long did they rest in 8 hours? 25/5=5 8/5= 1 3/8 hours

*asked on November 11, 2015* -
## Math

If h is hours and n is the number of radios remaining, complete the equation: n= ____ x h = ____

*asked on January 20, 2016* -
## Math

Suppose that Ramos contributes $6000/year into a traditional IRA earning interest at the rate of 2%/year compounded annually, every year after 35 until his retirement age at age 65. At the same time, his wife Vanessa deposits $4900/year into a Roth IRA

*asked on March 22, 2014* -
## Math

Please help me with the following. Write a word phrase to represent the numerical expression below. 5 + ( 17 - 8 )

*asked on December 5, 2017* -
## chemistry

When disaccharide beta is hydrolyzed, which monosaccharide units are produced?

*asked on December 16, 2012* -
## Physics 2

A 10 g bullet is fired into, and embeds itself in, a 2 kg block attached to a spring with a force constant of 19.6 n/m and whose mass is negligible. How far is the spring compressed if the bullet has a speed of 300 m/s just before it strikes the block and

*asked on January 20, 2012* -
## math

a rectangle has a length of 10 3/16 inches and a width of 6 7/8 inches. nwhat is the perimeter of the rectangle

*asked on May 29, 2013* -
## geometry

the measures of the interior angles of a pentagon are 2x, 6x, 4x-6, 2x-16 and 6x+2. What is the measure of the largest angle

*asked on April 26, 2010* -
## Chemistry

Explain how you would prepare 100.0 mL of 0.500 M NaCl solution. Include the appropriate glassware and calculations.

*asked on February 25, 2013* -
## Physics

Starting from rest, a 5.00 kg block slides 2.50 m down a rough 30.0 degree incline. The coefficient of kinetic friction between block and the incline is .436. Determine the work done by the friction force between block and incline and the work done on the

*asked on October 12, 2011* -
## Chemistry

The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in the solution? Show work. A) 0.69 B) 0.32 C) 0.13 D)

*asked on February 27, 2013* -
## uah

Assume you are performing the calibration step of Experiment 8 and you begin with 70 g of water at 20 oC and 70 g of water at 80 oC. After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment,

*asked on March 8, 2010* -
## college finite math

A product may be made using Machine I or Machine II. The manufacturer estimates that the monthly fixed costs of using Machine I are $17,000, whereas the monthly fixed costs of using Machine II are $14,000. The variable costs of manufacturing 1 unit of the

*asked on January 19, 2014* -
## Calculus

At 2:00pm a car's speedometer reads 60mph, and at 2:10pm it reads 65mph. Use the Mean Value Theorem to find an acceleration the car must achieve. Answer( in mi/h2):

*asked on February 8, 2015* -
## Chemistry

A solution contains Cr3+ ion and Mg2+ ion. The addition of 1.00 L of 1.55M NaF solution is required to cause the complete precipitation of these ions as CrF3(s) and MgF2(s). The total mass of the precipitate is 49.9g .Find the mass of Cr3+ in the original

*asked on October 1, 2014* -
## Math

Lisa, Beth, and Tim painted their grandparent's house. • The amount of time Lisa painted can be represented by x. • The amount of time Beth painted is 1 3 5 times the amount Lisa painted • The amount of time Tim painted is 1 2 3 times the amount Lisa

*asked on October 30, 2018* -
## college algebra

An isotope of lead, 201Pb, has a half-life of 8.4 hours. How many hours ago was there 40% more of the substance? (Round your answer to one decimal place.) ____hr

*asked on November 17, 2013* -
## chemistry

If 8.00g of methane is burned with 6.00g of oxygen. How much methane,oxygen,carbon dioxide,and water remain after the reaction is complete in grams?

*asked on November 12, 2012* -
## Geometry

An unsharpened pencil is in the shape of a hexagonal prism, in which the face edge is 4 millimeters and the length is 170 millimeters. What is the lateral area of the pencil?

*asked on May 1, 2013* -
## Math

I run 1 3/4 miles each day. my friend runs 4 times as far as I do. how far does she run ?

*asked on February 23, 2017* -
## Chemistry

The dosage of technetium -99m for a lung scan is 20 uci/ kg of body weight. How many millicuries should be given to a 50.kg patient (1 mci=1000uci)

*asked on March 2, 2015* -
## college math HELP!!!!!

The quantity demanded x each month of Russo Espresso Makers is 250 when the unit price p is $180; the quantity demanded each month is 1000 when the unit price is $150. The suppliers will market 750 espresso makers if the unit price is $80. At a unit price

*asked on January 19, 2014* -
## English/Grammar

Having trouble finding the simple predicates in the follwing sentences.. 1.They have destroyed some buildings. 2.The insects bodies can turn wood into food. 3.The insects damage property. 4. These insects eat wood. 5. Most of the insects are workers or

*asked on September 30, 2007* -
## math

monica keeps a supply of dimes and quarters in her car for highway tolls.A week's supply of toll coins contains 10 more dimes than quarters and totals $11.50. How many quarters does monica spend on highway tolls in one week? F. 26 G. 30 H. 36 I. 40

*asked on February 25, 2010* -
## Math

An architect designs a house that is 12 m wide. The rafters holding up the roof are equal length and meet at an angle of 68°. The rafters extend 0.6 m beyond the supporting wall. How long are the rafters? Hi - I was wondering if you could help me with

*asked on August 21, 2011* -
## chemistry

a piece of metallic iron (10 moles) was dissolved in concentrated hydrochloric acid. the reaction formed iron (II) chloride and hydrogen gas. how many moles of iron (II) chloride were formed?

*asked on March 26, 2014* -
## Chemistry

When disaccharide alpha is hydrolyzed, which monosaccharide units are produced? A) D-glucose and D-fructose monosaccharide units B) two D-fructose monosaccharide units C) two D-glucose monosaccharide units

*asked on December 16, 2012* -
## college finite math

Cowling's Rule is a method for calculating pediatric drug dosages. If a denotes the adult dosage (in milligrams) and if t is the child's age (in years), then the child's dosage is given by D(t) = (t + 1/24)a (a) Show that D is a linear function of t. Hint:

*asked on January 19, 2014* -
## Physics

A 2000 kg car is slowed down uniformly from 18.0 m/s to 5.00 m/s in 4.20 s. (a) What average total force acted on the car during that time? (b) How far did the car travel during that time?

*asked on October 5, 2012* -
## physics

A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a speed of 16.1 m/s at an angle of 41.1° above the horizontal. It rises to its maximum height and then falls down to the green.

*asked on January 31, 2013* -
## Algebra

Kevin stuffs shrimp in his job as a seafood chef. He can stuff 1200 shrimp in 4 hours. When his sister helps him, they can stuff 1200 shrimp in 3 hours. If kevin gets sick, how long will it take his sister to stuff 600 shrimp?

*asked on September 5, 2013* -
## College math HELP!!!!!

A financier plans to invest up to $450,000 in two projects. Project A yields a return of 10% on the investment, whereas Project B yields a return of 15% on the investment. Because the investment in Project B is riskier than the investment in Project A, the

*asked on February 22, 2014* -
## Chemistry

Isoamyl salicylate (м = 208.25 g/mol) has a pleasant aroma and is used in perfumes and soaps. Which of the following combinations gives a 0.75 m solution of isoamyl salicylate in ethyl alcohol (d = 0.7893 g/mL)

*asked on February 27, 2013* -
## physics

A copper cube, 0.31 m on a side, is subjected to two shearing forces, each which has a magnitude F = 6.40 106 N (see the drawing). Find the angle θ (in degrees), which is one measure of how the shape of the block has been altered by shear deformation.

*asked on April 3, 2013* -
## physics

Tarzan wights 820N, swings from a cliff at the end of a 20m vine that hangs from a high tree limb and initially makes an angle of 22 degrees with the vertical. Immediately after Tarzan steps off the cliff the tension in the cine is 760N. Choose a

*asked on November 25, 2006* -
## college finite math

Cowling's Rule is a method for calculating pediatric drug dosages. If a denotes the adult dosage (in milligrams) and if t is the child's age (in years), then the child's dosage is given by D(t) = (t + 1/24)a (a) Show that D is a linear function of t. Hint:

*asked on January 19, 2014* -
## Chemistry

A solution is made by mixing 37.0 mL of ethanol, C2H6O, and 63.0 mL of water.? Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C? ethanol: 0.789 g/mL 43.9 torr water : 0.998 g/mL 17.5 torr

*asked on March 2, 2013* -
## Chemistry

Use the data from this table of thermodynamic properties to calculate the maximum amount of work that can be obtained from the combustion of 1.00 moles of ethane, CH3CH3(g), at 25 °C and standard conditions. I absolutely have no idea what to do, please

*asked on April 30, 2013* -
## Physics

a cylinder of gas is at a room temp (20 c) the air conditioner breaks down and the tempture rises to 58c what is the new pressure of the gas relative to its initial pressure?

*asked on July 30, 2013* -
## physics

A navy jet with a weight of 231 kN requires an airspeed of 85 m/s for liftoff. The engine develops a maximum force of 107 kN, but that is insufficient for reaching takeoff speed in the 90 m runway available on an aircraft carrier. What minimum force

*asked on November 26, 2006* -
## math

The demand function for the Sicard wristwatch is given by the following function where d(x) (measured in units of a thousand) is the quantity demanded per week and x is the unit price in dollars. d(x) = 50 0.01x2 + 1 (0 ≤ x ≤ 20) (a) Find d'(x). d'(x)

*asked on February 6, 2015* -
## Math

I have a 3 part question that I have the answers for but I am still having issues understanding it. Looking for help with the explanation / steps on how you would get the answer. Question 1) The width of a rectangular field is 3h yards and it's length is 3

*asked on December 6, 2017* -
## Math

Needing help with the formula to be able to prove these answers to be correct. What are the steps ? Moesha's is ( 3G + 1 ) years old and Shanti is twice Moesha's age. A ) Find the sum of the ages of Moesha's and Shanti in2 years time. Answer The sum of

*asked on December 6, 2017* -
## Math

An airplane in Australia is flying at a constant altitude of 2 miles and a constant speed of 600 miles per hour on a straight course that will take it directly over a kangaroo on the ground. How fast is the angle of elevation of the kangaroo's line of

*asked on February 1, 2015* -
## math

Suppose the cost function associated with a product is C(x) = cx + F dollars and the revenue function is R(x) = sx, where c denotes the unit cost of production, s the unit selling price, F the fixed cost incurred by the firm, and x the level of production

*asked on May 7, 2011* -
## Physics

In a vacuum, two particles have charges of q1 and q2, where q1 = +3.7 µC. They are separated by a distance of 0.22 m, and particle 1 experiences an attractive force of 3.5 N. What is q2 (magnitude and sign)?

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

An electric heater used to boil small amounts of water consists of a 25-Ω coil that is immersed directly in the water. It operates from a 60-V socket. How much time is required for this heater to raise the temperature of 0.50 kg of water from 29° C to

*asked on January 27, 2014* -
## science

what is the mole ratio of C5H12-> C5H8 + 2H2?

*asked on March 9, 2011* -
## geometry

Find the weight to the nearest kg, of the cement block. Cement weighs 1700 kg/m3. 12cm x 10cm and 40cm x 20 cm x 20cm.

*asked on April 20, 2013* -
## MATH

A REGULAR PENTAGON ABCDE AND A SQUARE ABFG ARE FORMED ON OPPOSITE SIDE OF AB. FIND ANGLE BCF..

*asked on May 1, 2017* -
## College Algebra

A bank credit card charges interest at the rate of 23% per year, compounded monthly. If a senior in college charges $1,700 to pay for college expenses, and intends to pay it in one year, what will she have to pay?

*asked on October 28, 2013* -
## college algebra

In 4 years, 30% of a radioactive element decays. Find its half-life. (Round your answer to one decimal place.) _____ yr

*asked on November 17, 2013* -
## Physics

A ladder (L = 7.80 m) of weight WL = 360 N leans against a smooth vertical wall. The term "smooth" means that the wall can exert only a normal force directed perpendicular to the wall and cannot exert a frictional force parallel to it. A firefighter, whose

*asked on March 4, 2013* -
## Taxation

"Sally W. Emanual had the following dividends and interest during the current year. Acorn Corporation bond interest $700 City of Boston bongs interest 1,000 Camp Bank interest 1,250 Jet Corporation dividend(Qualified) 1,300 North Mutual fund Capital gain

*asked on December 10, 2010* -
## us history

"Although the economic growth of the United States between 1860 and 1900 has been attributed to a governmental policy of laissez-faire, it was in fact encouraged and sustained by direct government intervention." Assess the validity of this statement. What

*asked on January 13, 2011* -
## math

1. Put these rational numbers in order from smallest to largest. 3/4= 0.75, 2/7=0.287, 2/10=0.2, 5/8= 0.66, 8/4=2 2/10, 2/7, 5/8, 3/4, 8/4 ? 2. Order the numbers from least to greatest. 1.5, 3.25, 1.66, 3.33, 2.4 A)1.5, 1.66, 2.4, 3.25, 3.33

*asked on October 29, 2015* -
## Calculus

Using f(x), determine a formula for the Riemann Sum S_n obtained by dividing the interval [0, 4] into n equal sub-intervals and using the right-hand endpoint for each c_k. f(x)= 5x+2 Now compute the limit as n goes to infinity S_n to compute the area under

*asked on April 7, 2014* -
## college math HELP!!!!!

CalJuice Company has decided to introduce three fruit juices made from blending two or more concentrates. These juices will be packaged in 2-qt (64-oz) cartons. One carton of pineapple-orange juice requires 8 oz each of pineapple and orange juice

*asked on February 22, 2014* -
## Chemistry

I need another hypothesis: Mom and I were baking a cake for my brother's birthday. We didn't have any baking powder. The recipe said to add one teaspoon of baking powder to the cake batter. Since that's such a small amount we baked the cake anyway. We were

*asked on August 31, 2009* -
## MATHS

A REGULAR PENTAGON AND A SQUARE ABFG ARE FORMED ON OPPOSITE SIDE OF AB FIND ANGLE BCF.

*asked on May 1, 2017* -
## physics

An object with mass m1=5.00 kg rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2= 10.0 kg. Find the acceleration of each object and the tension in the cable.

*asked on September 26, 2011* -
## math/geometry

A pentagon with the a perimeter of 45 feet , what is the area

*asked on May 17, 2010* -
## Chemistry

Theoretically how many grams of malachite should be formed when 1.5 moles of Copper Sulphate reacts with an excess of sodium carbonate?

*asked on July 12, 2016* -
## Math

Translate the phrase into an expression: 8 times the sum of 7 and y

*asked on September 26, 2019* -
## social studies

what kind of landform covers the central part of North America

*asked on September 26, 2010* -
## Physics

The drawing shows a sulfur dioxide molecule. It consists of two oxygen atoms and a sulfur atom. A sulfur atom is twice as massive as an oxygen atom. Using this information and the data provided in the drawing, find (a) the x coordinate and (b) the y

*asked on April 1, 2013* -
## Physics

Two objects with masses of 3.00 kg are connected by a light string that passes over a frictionless pulley.what is the distance each object will move in the first second of motion if both objects start from rest.

*asked on September 28, 2011* -
## mat 116/algebra

A cylinder has a radius of 5 in. If the volume of the cylinder is 250ƒà in.3, what is the height of the cylinder? [Hint: The volume of a cylinder is given by V = ƒàr2h.] I think I wrote it wrong the first time. The volume of a cylinder is pi r^2 h.

*asked on May 13, 2007* -
## english

According to Dickinson, what is the character of Nature? Nature divides people from each other Nature is intentionally heartless Nature offers inspiration and meaning A or probably B.

*asked on November 19, 2015* -
## math

Forty-eight sheep live on the farm. Thirty-six cows also live on the farm. What is the ratio of sheep to cows

*asked on April 25, 2017* -
## Chemistry

How many grams of magnesium oxide could be formed from the reaction of .248g of magnesium metal?

*asked on September 14, 2015* -
## Social Studies

What was the main belief of Enlightenment thinkers? (A) That government power should be limited. (B) That a republic was the best form of government. (C) That the use of reason was vital to improving society. (D) That a government should be strong enough

*asked on August 27, 2019* -
## Geometry (check answer)

Prove that the triangles with the given vertices are congruent. A(3, 1), B(4, 5), C(2, 3) D(-1, -3), E(-5, -4), F(-3, -2) a The triangle are congruent because triangle ABC can be mapped to triangle DEF by a rotation. (x,y)--->(y, -x) Followed by a

*asked on December 9, 2017* -
## Jewelry markings

I have a diamond ring with the marks "KOBI 14K" inside. I know what the 14K stands for; but, what does the "KOBI" mean?

*asked on December 21, 2007* -
## college math

CalJuice Company has decided to introduce three fruit juices made from blending two or more concentrates. These juices will be packaged in 2-qt (64-oz) cartons. One carton of pineapple-orange juice requires 8 oz each of pineapple and orange juice

*asked on February 23, 2014* -
## Algebra 2

The heights of 200 kindergarten students are normally distributed with a mean of 40 and a standard deviation of 1.8 inches. Approximately how many students have a height between 37.3 inches and 44.5 inches?

*asked on January 18, 2017* -
## Math

What ratio represents the probability of drawing a red card from a standard deck of 52 cards?

*asked on April 24, 2010* -
## Finite Math

Find the effective rate of interest corresponding to a nominal rate of 6%/year compounded annually, semiannually, quarterly, and monthly. (Round your answers to two decimal places.)

*asked on May 6, 2011* -
## physics

Two curves on a highway have the same radii. However, one is unbanked and the other is banked at an angle θ. A car can safely travel along the unbanked curve at a maximum speed v0 under conditions when the coefficient of static friction between the tires

*asked on February 28, 2013*