Saturday

April 19, 2014

April 19, 2014

Total # Posts: 149

**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 axis is 0.800 MR2. Fri...

**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

**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

**Medical Billing and Coding**

A. 434.91, 438.21, 438.12, 250.00 305.1, 88.91, 93.39, 93.72

**Medical Billing and Coding**

B. 434.91, 342.91, 784.59, 250.00, 305.1, 88.91, 93.39, 93.74

**physics**

9.816

**Physics**

1c please

**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?

**Statistics**

.0288

**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?

**Physical Science**

The transfer of heat that takes place because of the density difference in fluids is

**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)

**math**

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

**Statistics**

10.12

**Math**

A line has a slope of 6/7 and a y-intercept of -5. Which of the following is the equation of the line? 7x - 6y = -35 7x - 6y = -5 6x - 7y = 35 6x - 7y = -35 I'm honestly not sure with this, I'm thinking that it's 7x - 6y = -5.. Not sure though. Also, could you expl...

**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 the next month, and t...

**trig**

what is 7pi/3 in degree .13pi/3 in degree

**physics**

ml

**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 of the region bounded...

**Chem**

Great! Thank you!

**Chem**

thanks! all i did for a was change 2.4 by converting it in the manner they said, from feet to inches, inches to centimeters. same with 19.3. i changes it from grams to pounds.

**Chemistry**

actually, thats not the right answer. you end up getting .21 which is wrong for some reason.

**Chemistry**

thanks. i wanted the actual way to get it, but whatever.

**Chemistry**

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

**science**

does anyone know?

**science**

I am thinking a, if they mean adaptive radiation...

**science**

a. Evolution of human and bat forelimbs was adaptive, but not for whales. b. Humans and bats evolved by natural selection and whales evolved by Lamarckian mechanisms. c. Whales are not properly defined as mammals. d. Natural selection in an aquatic environment resulted in sig...

**science**

Analysis of forelimb anatomy of humans, bats, and whales shows that humans and bats have fairly similar skeletal structures, while whales have diverged considerably in the shapes and proportions of their bones. However, analysis of several genes in these species suggests that ...

**SCIENCE**

Celsius, grams, liters, and meters, if you mean the metric system

**math**

2.78 (rounded to the nearest 100th)x 10^3

**Math**

Any help would be appreciated! What is 38.896/5.1 + 509.15 to the correct number of significant figures? 516.78 What is (154+8446.1)/54 to the correct number of significant figures? 159.261 Thanks!

**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.

**Pre-Calc**

Hello! I'm stuck on how to do this problem and would appreciate some help! Choose a non-zero complex number c for f(z) = z2+ c. Find a complex number v that is in the escape set. Find a complex number w that is in the prisoner set. Graph the first five iterations of both v...

**Art**

Yes, that makes sense. Thank you!

**Art**

Well if that is not the answer then it would have to be A because C and D kind of go hand and hand.

**Art**

Can you help with one more thing? The features of mosaic art include the following EXCEPT: A)background is naturalistic B)figures usually have stiff and stylized gestures C)outlines are made clear and bold D)the overlapping of figures is avoided B

**Art**

Great! Thank you!

**Art **

Any help is appreciated! What are Pendentives? A)Free standing pillars B)Semicircular arches C)Octagonal lintels D)Hemispherical dome I'm not sure about this one. They are not A because they were not freestanding. D could be right because I've seen them described in su...

**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. by becoming consc...

**Chemistry**

Thank You!

**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 equilibrium part...

**language**

does a type sketch always have to be written negatively? Can one write a type sketch from a positive point of view? Instead of pointing out vices or folly, can one point out good attributes? Thanks

**math**

The length of A'B is '18.12' For sure it's the right answer.

**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 rate constant in un...

**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.

**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, what amount would b...

**Chemistry!!**

Calculate the pH of 10.00 mL of 0.40 mol/L of hydrochloric acid.

**algebra**

Can u traslate the following into words 3+w 8x 40-p

**Math - 5th grade**

Hmmmmm u better ask your mom for answers!!!!!!!!!!!! cheat cheat cheat!!! use the easy way out!

**Science**

20 sec

**social study**

Suppose the president vetoed a bill passed by Congress. According to the information, which of the following? actions by Congress would most likely ensure that the bill will become? 1) let the veto stand 2) reintroduce the same legislation 3) try to override the veto with a tw...

**Physics**

The net external force on the propeller of a 3.6 kg model airplane is 8.4 N forward. What is the acceleration of the airplane? Answer in units of m/s 2

**chemistry**

What is the equilibrium constant "Kp" at 200 C for the reaction below: P4(s) + 6 Cl2(g) --><-- 4 PCL3(l) Given the following at 200 C P4(s)+ 10 Cl2(g) --><-- 4 PCl5(s) Kc=8.12 PCl3(l)+ Cl2(g) --><-- PCl5(s) Kc=0.771 Answer: 6.7*[10^(-9)] not sure wh...

**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) ---><--- NH4HS(s) Answer: 1.0*[10(-2)] Not sure what to do here; I ...

**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) ---><--- NH4HS(s) Answer: 1.0*[10(-2)] Not sure what to do here; I ...

**science****

The relationship of algae, moth, and sloth would be classified as?

**science****

The relationship of algae, moth, and sloth would be classified as?

**8th grade algebra: radicals**

Answer to number 3 is wrong. (didn't realise it was x+4 to the power of two thirds. Sorry):

**8th grade algebra: radicals**

Answer to number 3: 2/3(x+4) = 8 2(x+4) = 24 2x+8 = 24 2x = 16 x = 8

**Math**

1. 8k=6k-26 2k = -26 k = -13 2. 5/8a +6 = 6/8a 6 = 1/8a 48 = a 3. 3/12n +10 = 8/12n 10 = 5/12n 120 = 5n 24 = n 4. 20 - 2/10d = 3/10d +16 4 = 1/2d 8 = d (I think. You should check.)

**com/220**

when do you normally find information for topics that interest you? how do you know when sources are reliable.

**Statistics**

50%

**calculus**

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

**math**

principal is $750.00 rate is 9 1/2% for 200 days using a 360 day calendar year what's the interest?

**Nursing**

How many calories can 1L of TPN contain?

**chemistry**

4900

**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.

**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.

**Chemistry**

6.2%

**Chemistry**

Okay I'm doing a lab report, and I need to find the average of two trials. Can someone show me step-by-step how do find the uncertainty for this average: (4.32g+4.17g)/2 =4.25 The values I used and their uncertainties: 4.32g +/- 0.02 4.17g +/- 0.02

**Chemistry**

Okay I'm doing a lab report, and I need to find the average of two trials. Can someone show me step-by-step how do find the uncertainty for this average: (4.32g+4.17g)/2 =4.25 The values I used and their uncertainties: 4.32g +/- 0.02 4.17g +/- 0.02

**math**

The mean is calculated with this general formula: mean= (sum of numbers in a set)/(# of numbers) You know that for a set of 36: Mean=27 # of numbers=36 So: 27=(sum of numbers in a set)/36 which can be rearranged as: sum of numbers in a set=27*36 sum of numbers in a set=972 The...

**math**

Make an equation to help you solve! We know that: Side1=16cm Side2=Side3 Let's name Side1 x, and Side2 and Side3 (Because they are the same) y. Perimeter=Side1+Side2+Side3 Perimeter=x+y+y Perimeter=x+2y Sub in your value for x: P=16+2y Now, we also know that: 2P=(Side1+24c...

**math**

Hm, it's not clear as to what it means by 'why', but if you calculate what 3 pencils would cost, and do the math as if you didn't buy those three pencils, the change will be 3.58. So perhaps with 'why' you could say that the cashier forgot to include th...

**Social Studies**

It does charge for complete articles, but it does have a short brief which is free. For a very general idea of what you are looking for, the Encyclopedia Britannica is fine. Sra's suggestions are very good, though.

**Social Studies**

A lot of these can't really be 'defined', but a very good website where you can find a general idea of what these things are is the Enyclopaedia Britannica website. I hope this helps (:

**Chemistry**

I'm not entirely sure what you mean, but after a thorough search through notes I think I might get it... correct me if I'm wrong? I need to use relative uncertainties, and then use the relative uncertainty to find the uncertainty? (I know how to do both of those, I jus...

**Chemistry**

When finding uncertainties in measurements, I know that if you are adding or subtracting, you must add the uncertainties of the two values. But what do I do if I multiply/divide?

**algebra**

For a, you are given the number of minutes, which is represented by x. Simply substitute your value of x (25) into the equation (y=35+0.8x) to find the value of y, which is the distance of the sports car from Flint. For b, you are given the distance of the sports car from Flin...

**spanish**

i need 10 interrogative sentences in spanish talking about being on vacation.

**Calculus - integration**

Integral of (2x+5sin(x))^2 dx i didnt know how to start this question so i expand the squre first and then did the rest but its wrong and i dont think my method is right. thank you.

**Calculus - integration**

Thank you so much!!!

**Calculus - integration**

Q. ¡ò(15^x/3^x) dx i know that the ¡ò(a^x) dx = a^x/lna +c but i dont know how to solve this question. thank you

**8th grade science**

Neuclear waste products emit radioactivity. Radiation can change genetic stuff so it can give living things health problems like cancer.

**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?

**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 ball push against the w...

**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?

**economics i really need help plzzz anyone**

the government in mortorania buys $20 million in goods and services,collects $15 million in taxes,and borrows the remaining $5 million.its taxes produce no dead weight costs.what is the cost of government in mortorania?

**can someone plzzz answer this ? for me plzzzzzzz**

the government in mortorania buys $20 million in goods and services,collects $15 million in taxes,and borrows the remaining $5 million.its taxes produce no dead weight costs.what is the cost of government in mortorania?

**economics can someone answer this ? plzzz**

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 laid-off worker

**economics can someone answer this ? plzzz**

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

**i really need help with my hw**

can someone plzzz help me

**economics(simple question plzz answer it**

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

**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 laid-off worker

**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?

**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?

**economics**

the government in mortorania buys $20 million in goods and services,collects $15 million in taxes,and borrows the remaining $5 million.its taxes produce no dead weight costs.what is the cost of government in mortorania?

**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 laid-off worker

**economics**

the local city gave $500 worth of clothing to all the poor families in town.therefore, these families will have $500 more clothing than before."is this correct?