Friday

April 29, 2016
Total # Posts: 3,312

**Physics -- check answers please (new)**

1. Which of the following best shows the transfer of heat by radiation? a) the hot sand in very painful to step on with bare feet b)the soup pot boils from the bottom towards the top c)the wood stove is painted a flat black colour for maximum heating effect d)the use of fossil...
*March 4, 2014*

**Physics -- check answers please**

1. Which of the following best shows the transfer of heat by radiation? my answer: c 2. Which of the following best shows the transfer of heat by convection? my answer: b 3. Water has specific heat of 4200 J per kilogram per degree celsius. This means that 2 kg of water will ...
*March 4, 2014*

**US history **

1. In the early years of the war, all reports coming to the USA had to be “cleared” through England. 2. In the 1916 presidential election, Republicans used the slogan “He kept us out of war” against Wilson. 3.Wilson’s Fourteen Points called for self-...
*March 4, 2014*

**Economics**

A clinic has $1 million in revenues and $950,000 in costs. What is its operating margin? My answer is 5% However the second question is if the clinic invested $400,000. What is the return on investment and is it adequate. Not sure how I calculate that. Would I take the 5% of $...
*March 4, 2014*

**Physics -- check answers please**

1. what is 67 K equivalent to in Celsius? answer: -206.15 C 2. what is 458.9 Celsius in K? answer: 732.05 3. heat is closely related to: a)temperature b)thermal energy c)force d)convection currents answer: b 4. What does a low efficiency score reveal about a home in terms of ...
*March 3, 2014*

**Mathmatics**

Create a program that uses the same formula above to output the result; this time, however, prompt the user for the values a, b, x, and y. Use appropriate variable names and naming conventions.
*March 3, 2014*

**Chemistry**

Oh okay, thankyou!
*March 2, 2014*

**Chemistry**

I know I'm suppose to use 3.86934 as the first volume and 10 kPa as the second pressure, but what am I suppose to use as the first pressure? Am I suppose to use 20.0 km?
*March 2, 2014*

**Chemistry**

A weather balloon with a volume of 3.86934 L is released from Earth’s surface at sea level.What volume will the balloon occupy at an altitude of 20.0 km, where the air pressure is 10 kPa? Answer in units of L
*March 2, 2014*

**Physics -- check answers please**

1. what is 67 K equivalent to in Celsius? answer: -206.15 C 2. what is 458.9 Celsius in K? answer: 732.05 3. heat is closely related to: a)temperature b)thermal energy c)force d)convection currents answer: b 4. What does a low efficiency score reveal about a home in terms of ...
*March 2, 2014*

**science**

unscramble rorpsfgnloaedeasi
*March 1, 2014*

**Social studies**

Help me to write an acrostic about motion.
*February 27, 2014*

**Economics Supply and Demand**

The demand function is Q=600-P with P being the price paid by consumer. I know the first P is $400 and Pnet is 160. There is 40% co insurance,. How do I figure out the quantity demanded? Our instructor said it was 440 but how do you get to that number?
*February 27, 2014*

**IFSM 300**

The sales department tells management that they can increase revenue by 20 percent by increasing sales 20 percent, but the production department says that to achieve that number of units, they will have to buy a new piece of equipment that will add $200,000 to the appropriate ...
*February 26, 2014*

**IFSM 300**

The sales department tells management that they can increase revenue by 20 percent by increasing sales 20 percent, but the production department says that to achieve that number of units, they will have to buy a new piece of equipment that will add $200,000 to the appropriate ...
*February 26, 2014*

**Stats**

0.2845 0.6984
*February 25, 2014*

**Economics/Forecasting**

If you anticipate that volume will increase at your clinics by 4% next year. Forecast visits for each clinic, and explain what assumptions underline your forecast. Can someone give me an example please not sure what it is asking.
*February 25, 2014*

**Physics-check answer please (multiple choice)**

1. A 2.5 kg mass at rest on a horizontal surface is acted upon by an applied horizontal force of 150 N. A frictional force of 100 N acts on the mass. How much work is done on the mass? my answer: would the work be 0? 2. When a rock is thrown straight up in the air, after it ...
*February 24, 2014*

**math**

Each user has a password 6 characters long where each character is an uppercase letter, a lowercase letter, or a digit. Each password must contain at least one digit. How long will it take to check every possible character combination, if each check takes one unit of time.
*February 24, 2014*

**Physics -- check answers please**

1. In moving an object of mass 10 kg through a distance of 8.0 m, 40 J of work is done. The average force exerted is? my answer: 320N 2. What is the kinetic energy of a 20 kg object moving at a speed of 10 m/s? my answer: 1000J 3. the gravitational potential energy of a bird ...
*February 23, 2014*

**physics**

how far does a wave travel in one period?
*February 23, 2014*

**Physics -- check answers**

1. In moving an object of mass 10 kg through a distance of 8.0 m, 40 J of work is done. The average force exerted is? my answer: 320N 2. What is the kinetic energy of a 20 kg object moving at a speed of 10 m/s? my answer: 1000J 3. the gravitational potential energy of a bird ...
*February 23, 2014*

**chemistry**

Electronegativity is a concept that is useful along with other concepts in predicting the polarity of a bond deciding how many electrons are involved in a bond formulating a statement of the octet rule determining the charge on a polyatomic ion
*February 23, 2014*

**Chemistry**

which of the following sets of elements is arranged in order of decresing electronegativity? O,S,As Cl, B, CL Br, Cl, P Be, C, O please explain correct answer
*February 23, 2014*

**chemistry**

what is the geometry of the molecular compound formed by the reaction of sulfur with hydrogen? linear angular trigonal planar tetrahedral please explain the correct answer
*February 23, 2014*

**chemistry**

VSEPR theory predicts that the geometry of AsH3 molecule is which of the following. linear trigonal planar trigonal pyramidal tetrahedral please explain the correct answer
*February 23, 2014*

**math**

convert 20 pounds to kilograms then round to the nearest tenth
*February 23, 2014*

**american government**

McCulloch v Maryland is an important case because it was one of the cases whereby the Supreme Court (Points : 1) asserted the supreme authority of Congress. asserted national authority over the states. upheld states’ rights. affirmed Maryland’s right to tax national...
*February 21, 2014*

**american government**

In Gibbons v. Ogden, the Supreme Court held that (Points : 1) states’ rights to regulate may not trample on powers specifically reserved for Congress. states’ rights supersede national authority. the national government does not have interstate commerce authority. ...
*February 21, 2014*

**advanced functions**

=the height in metres of a weather ballon above the ground after t seconds can be modelled by the function h(t)=-2t^3+3t^2+149, for 0<t<10. when is the ballon exactly 980 m above the ground?
*February 20, 2014*

**Math**

A killer whale has eaten 75 pounds of fish today. It needs to eat at least 140 pounds of fish each day. A bucket holds 15 pounds of fish. Write and solve an inequality that represents how many more buckets of fish the whale needs to eat?
*February 20, 2014*

**Chemistry URGENT**

Please show how N and O are combined to make NO^+2 in Lewis dot structure. I'm having a hard time. Thanks
*February 19, 2014*

**Chemistry**

three separate questions 1. An empty graduated cylinder weighs 82.450 g. When filled to 50.0 mL, with an unknown liquid it weighs 110.810 g. What is the density of the unknown liquid? 2. It is valuable to know that 1 milliliter (mL) equals 1 cubic centimeter (cm^3) or cc.). ...
*February 11, 2014*

**Economics**

It takes a phlebotomist 15 minutes to complete a blood draw. The supplies for each draw cost $4, and the phlebotomist earns $20 per hour. The phlebotomy lab is designed to accommodate 20,000 draws per year. What are the average and incremental costs of a blood draw when the ...
*February 10, 2014*

**statistics**

Provide the Z score and the critical value. Raw score of 112, population mean 89, Std. of the population (22.8)
*February 10, 2014*

**statistics**

The test scores of students in a class test have a mean of 65 and with a standard deviation of 8. What is the probable percentage of students scored more than 70?
*February 10, 2014*

**chemistry**

In which of the following pairs of compounds are both members of the pair ionic compounds? Explain a. Pl3 and HBr b. H2S and NCl3 c. LiF and H20 d. LiI and NiO DrBob222 you said you would choose the answer d and I should know how to figure this out. I don't understand the ...
*February 9, 2014*

**chemistry**

the correct formula for the ionic compound containing Tl^3+ and Te^2- ions would be: a. TlTe b. Tl3Te2 c. Tl2Te3 d. Tl2Te
*February 9, 2014*

**Chemistry**

6 separate questions. I have figured out the other 20 questions I am stuck. Please help Thanks The correct name for the ionic compound Al2Se3 is? The correct name for the ionic compound Fe2Se3 is? the Roman numerall III in the name Iron(III)oxice indicates what? Which of the ...
*February 9, 2014*

**chemistry**

In which of the following pairs of compounds are both members of the pair ionic compounds? Explain a. Pl3 and HBr b. H2S and NCl3 c. LiF and H20 d. LiI and NiO
*February 9, 2014*

**chemistry**

the correct formula for the ionic compound containing Tl^3+ and Te^2- ions would be: Please show. thank you
*February 9, 2014*

**Healthcare Economics**

Your president bought two acres of land for $200,000 ten years ago. Although it is zoned for commercial use, it currently houses eight small, single-family houses. A property management fir that wants to continue leasing the eight houses has offered you $400,000 for the ...
*February 8, 2014*

**math**

a train leave Chicago at a 115 miles per hour towards Denver another train leaves Denver 105 miles per hour towards Chicago if the distance between the two cities is 1200 miles how long would it take before the two trains meet?
*February 7, 2014*

**algebraic expressions**

What is the algebraic expression for the following word phrase the product of 2 and y
*February 6, 2014*

**calculus**

If limit as delta x approaches 0 of tan(0+Δx)-tan(0)/Δx =1 which of the following is false: d/dx [tanx]=1 the slope of y = tan(x) at x = 0 is 1 y = tan(x) is continuous at x = 0 y = tan(x) is differentiable at x = 0
*February 6, 2014*

**calculus**

Suppose h(x) = f (g(x)) and the graphs of f and g are shown below. Describe the continuity of h at x = 0. how would you do this if you were given two graphs: F--- discontinuity at -2,0; point at -1,1; and point at 0,0 (to make a parabola) then discontinuity at 0,-1; and then ...
*February 6, 2014*

**clalc**

and the answer options are h is continuous at x = 0. h is discontinuous at x = 0 since h(0) is undefined. h is discontinuous at x = 0 since the limit of h(x) as x approaches 0 does not exist h is discontinuous at x = 0 since the limit of h(x) as x approaches 0 does not equal 0
*February 6, 2014*

**clalc**

Suppose h(x) = f (g(x)) and the graphs of f and g are shown below. Describe the continuity of h at x = 0. how would you do this if you were given two graphs: F--- discontinuity at -2,0; point at -1,1; and point at 0,0 (to make a parabola) then discontinuity at 0,-1; and then ...
*February 6, 2014*

**calculus**

Which of the following best describes the limit as x approaches 4 of the quotient of 2 times x divided by the quantity negative 2 plus square root of x ? It exists and equals 4 It fails to exist because it is unbounded. It fails to exist because its one-sided limits are not ...
*February 5, 2014*

**chemistry**

6 part question 1. describe the appearance of a Bunsen flame that is getting insufficient air? 2. describe the appearance of a Bunsen flame that is getting too much air. 3. When inserting glass tubing into a rubber stopper, how far from the stopper should you hold the tubing? ...
*February 5, 2014*

**chemistry**

Two naturally occurring isotopes exist for the hypothetical element dippium. 25.0 percent of dippium atoms have a relative mass of 17.0 amu and 75.0 percent a relative mass of 21.3 amu. What is the atomic mass of dippium? Please show the work thanks
*February 4, 2014*

**Physics **

An airplane moves away from a stationary observer at 125 m/s and emits a frequency of 595 Hz on a day where the temperature is 25.0°C. What frequency does the observer hear?
*February 3, 2014*

**CHEMISTRY**

The grams of protein in 1 cup of soup that has 110 Cal{\rm Cal} with 7 g{\rm g} of fat and 9 g{\rm g} of carbohydrate. Express your answer using one significant figure.
*February 1, 2014*

**math**

1563.75
*January 30, 2014*

**Science**

A 15.3 kg object is dropped from an initial height of 33.5m above the ground. Find the speed when it hits the ground.
*January 28, 2014*

**Finance**

Kim Davis is in the 40% personal tax bracket. She is considering investing in HCA (taxable) bonds that carry a 12% interest rate. a. What is her after-tax yield (interest rate) on the bonds? b. Suppose Twin Cities Memorial has issued tax exempt bonds that have an interest rate...
*January 27, 2014*

**ashford**

All of the following are true of what typically occurs when first meeting someone EXCEPT: (Points : 1) First impressions are based mostly on facial appearance. We form our impressions of others within less than a second of meeting them. We form conclusions about a person’...
*January 25, 2014*

**math**

A car company charges $35 per day plus 20 cents per mile to rent a car. Write an equation to express the average cost per x mile.
*January 24, 2014*

**Chemistry**

-8995.14 J I believe. q= 177g (.385 J/g C) (-132 C)
*January 23, 2014*

**math**

Find a function that models weekly profit in terms of price per feeder.
*January 23, 2014*

**Chemistry**

Hey can anyone help me solve these questions 1. Balance K2Cr2O7 +H2C2O42H2O --> K[Cr(CrC2O4)2(H2O)2]2H2O +CO2+ H2O 2. Calculate the theoretical yield of the reaction mentioned above 3.What is the theoretical percentage by weight of Cr in the reaction mentioned above 4. Why ...
*January 17, 2014*

**Physics**

A cubical block of wood 0.100 m on a side and with a density 550 kg/m^3 of floats in a jar of water. Oil with a density of 750 kg/m^3 is poured on the water until the top of the oil layer is 0.035 m below the top of the block. 1. How deep is the oil layer? Please tell me the ...
*January 17, 2014*

**Integral Calculus**

A jeepney's velocity over time in ft/sec as it moves along the x-axis is governed by the function v(t)=3t^2-10t+15. If the jeep's position at t= 1 second is 8ft, what is the total displacement made by the jeepney from t=0 to t=5sec? please I need help, i just need the ...
*January 12, 2014*

**physics**

A satellite is placed in orbit 100 km above the surface of the earth (radius = 6370 km, mass = 5.98 x 1024 kg). What is the value of the acceleration of gravity at that altitude as a percentage of the acceleration at the surface of the earth?
*January 10, 2014*

**Physics Please check my answer**

Thank You!
*January 10, 2014*

**Physics Please check my answer**

How much work is done by the centripetal force (in this case, the friction between the tires and the road) on a 1200 kg car moving on a circular track of radius 50 meters at a constant speed of 31.4 m/s? A. 7.4 • 10^6 J B. 19.7 J <--- C. 2136.7 J D. 117,600 J E. 0 J
*January 10, 2014*

**scice help!?!?!?!**

11. D 12. I believe that this one is either D or B. I'm pretty sure this one is D too, though.
*January 10, 2014*

**Physics**

A billiard ball traveling at 6.25 m/s collides with a second stationary ball of equal size and shape causing the second ball to move at an angle of 25º with respect to the horizontal at a speed of 3.0 m/s.Both balls have a mass of .210kg. What is the impulse of both balls...
*January 10, 2014*

**Physics**

I really need help with this problem. A billiard ball traveling at 6.25 m/s collides with a second stationary ball of equal size and shape causing the second ball to move at an angle of 25º with respect to the horizontal at a speed of 3.0 m/s.Both balls have a mass of ....
*January 4, 2014*

**Physics **

A billiard ball traveling at 6.25 m/s collides with a second stationary ball of equal size and shape causing the second ball to move at an angle of 25º with respect to the horizontal at a speed of 3.0 m/s.Both balls have a mass of .210kg. What is the impulse of both balls...
*January 4, 2014*

**MATH**

Owen has 20% more marbles than Danny. Danny has 40% less marbles than Connie. Owen has 21 marbles less than Connie. How many marbles does Danny have?
*December 30, 2013*

**math**

A tank contains 4L of water at first. Tap A is turned on and water from tap A flows into the container at the rate of 8L per minute. After 3 minutes, Tap B is turned on. Both taps are turned off together after another 5 minutes. If the total amount of water in the container is...
*December 30, 2013*

**SENTENCE SKILLS**

B
*December 17, 2013*

**Math**

Recall that the equation for the horizontal distance h in feet of a projectile with initial velocity v0 and initial angle theta is given by h=v0^2/16 sin theta cos theta . a. Assume the initial velocity is 60 ft/second. What initial angle will you need to ensure that the ...
*December 6, 2013*

**Ashford**

According to to scholars what is one way the advent of talking pictures changed the behavior of movie audiences
*December 1, 2013*

**Astride university**

What is the correct technical name for the music that plays in the background of a scene while the action takes place
*December 1, 2013*

**biology**

silent
*November 25, 2013*

**finance**

Find the amount of periodic payment necessary for the deposit to a sinking fund: A=50,000 n=semiannually , r=13%, t=15 yrs.
*November 23, 2013*

**Statistics**

Many dairy cows now receive injections of BST, a hormone intended to spur greater milk production. A group of 53 Jersey cows increased average milk production from 43 to 52 pounds per day, with a standard deviation of 4.8 lbs. Is this evidence that the hormone maybe effective ...
*November 21, 2013*

**Statistics**

If the cases selected for one sample have no influence upon the cases selected for a second sample, then the samples are said to be: A) independent B) inconsistent C) dependent D) consistent A
*November 21, 2013*

**math**

I got it wrong. I don't understand why.
*November 21, 2013*

**math**

I have a question I have been working on since yesterday and I am not making this up. I couldn't get the right answer. If sin theta = -2/3, which of the following are possible? A: cos theta= -the sqr rt of 5/3 and tan theta =2/3. B: sec theta = 3/the sqr rt of 5 and tan ...
*November 21, 2013*

**Intro to trigonometry**

sorry I forgot to put my name.
*November 20, 2013*

**Intro to trigonometry **

If sin(theta) < 0 and tan(theta) > 0 then: in degrees. Ok I need help with this I couldn't understand the lesson and want to know how to do problems like this. Please help me by showing me step by step! Thank u in advance.
*November 20, 2013*

**chemistry**

if the %m/m of a solution of NaCl is 22%, how may grams of NaCl are present in 250g of solution?
*November 19, 2013*

**Pre-Calc**

A wrecking ball attached to a crane swings back and forth. The distance that the ball moves to the left and right of its resting position with respect to time is represented by the following graph.
*November 15, 2013*

**Social Studies**

WWI: Why would the Canadiens( Francophone) and the Maritime provinces be less interested in going to war in Europe than those Canadians of British heritage?
*November 14, 2013*

**math**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 4.9 * 10^2 µm. Find this earthquake's magnitude.
*November 11, 2013*

**algebra**

The atmospheric pressure P in pounds per square inch (psi) is given by P = 14.7 e^−0.21 a where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 12.17 psi, what is its altitude?
*November 11, 2013*

**Stat**

A bank is testing a new method for getting delinquent customers to pay their past-due credit card bills. The standard way was to send a letter (costing about $0.45) asking the customer to pay. That worked 30% of the time. The bank wants to test a new method that involves ...
*November 11, 2013*

**algebra**

Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.42 * 10^5 watts cm^2 what is the db?
*November 11, 2013*

**math**

solve: 2 ln e= ln sqrt of 7/x-2 ln e what would be x?
*November 11, 2013*

**algebra 2 Please help**

8x/6y divide by 2x/3y
*November 10, 2013*

**math**

2 ln e = ln sq rt. 7/x-2 ln e
*November 10, 2013*

**math**

is the answer 933?
*November 10, 2013*

**math**

An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount a spent on advertising (in dollars) by the following formula: N = 1,500 + 300 ln a (a ≥ 1) How many units are sold after spending $1,000?
*November 10, 2013*

**math**

Bob has 22 stamps. this is 6 times as many as Joe has. Bob makes a model to compare the number of stamps they have
*November 9, 2013*

**algebra 2 help please would appreciate **

4/x+5/y divide 3/x+7/y simplify complex fraction thank you show work
*November 9, 2013*

**algebra 2 help please would appreciate **

3+(2x/x+4) divide x/x+4 please simplify the complex fraction thank you show work
*November 9, 2013*

**Algebra 2 help please would appreciate **

8x/6y divide 2x/3y simply fraction show work thank you
*November 9, 2013*