# Posts by richard

Total # Posts: 302

**Math**

A salesperson sold 4 cars for a total value of 54,000 dollars. Her co-worker sold 8 cars for a total the value of d dollars. Write an algebraic expression that represents the combined value of the cars sold by the salesperson and her co-worker?

**Physics**

whoops, I noticed I used 3.4 seconds not 3.14 y= .5*9.8* 3.14^2= 48.31

**Physics**

If ball1 has been dropping for 3.4 seconds, then ball1 has dropped: y= vo*t+(1/2)*g t^2 where vo= 0.0 since is was "dropped", not thrown. or y=.5*9.8*3.49^2= 59.68meters

**terminal velocity**

A que ball dropped from a third floor window will reach what speed/velocity? Is that high enough to reach terminal velocity?

**math**

Do the equations x = 5y + 3 and x = 5y – 3 have the same solution? How might you explain your answer to someone who has not learned algebra? 200 words or better

**Government**

If you asked the same question about an upcoming election to many people,you would be conducting a? A.Scientific poll B.Straw Vote C.Public Agenda D.Representative Sample

**Physics**

It's all good to say that Brandon but the fact is you googled as well and came to this link. Hahahahaha

**Science**

I need help in Science Project. The topic is called "How does the size affect the force of magnetism". I didn't see any procedure in how to do this particular topic can you help me?

**Statistics**

The Deborah Heart Institute performs many open-heart surgery procedures. Recently research physicians at the Institute developed a new heart bypass procedure that they believe reduces the average length of recovery. The hospital board will not adopt the procedure unless there ...

**science**

t will not change. It will continue in the same direction at the same speed.. Science Fusion Houghton Mifflin Harcourt.

**Maths**

14 metres of rope costs €9.52. If Joe bought 21 metres, how much change out of €20.00 do Joe get? Is there a shorter way of doing this other than dividing, multiplying and then subtracting?

**algebra**

4r - 10r + 24

**PHYSICS**

Mass on moon = mg. = 70 kg × 0.17 =11.9 N.

**algebra**

The solution to this i believe is no solution need help. -2x+2>-2x-3

**chemistry**

Oh reacts with Ca which decreases [Ca] and pushes reaction right CaC2O4<>Ca+C2O4

**History**

thank you

**History**

Both were a cry for independence and freedom. Is that correct

**History**

How was the writing of the Grito de Dolores similar to the writing of the petition by the First Continental Congress?

**Algebra**

(8.1 . 10^8) . (4.2 . 10^3)

**FRATION**

12/345

**Math-Statistics**

Find a confidence interval for ƒÊ assuming that each sample is from a normal population. a. P x = 14, ƒÐ = 4, n = 5, 90 percent confidence b. P x = 37, ƒÐ = 5, n = 15, 99 percent confidence c. P x = 121, ƒÐ = 15, n = 25, ...

**physics**

What minimum strength of magnetic field is required to balance the gravitational force on a proton moving at speed 6 106 m/s?

**Physics**

What minimum strength of magnetic field is required to balance the gravitational force on a proton moving at speed 6*10^6 m/s?

**Physics**

If Galileo and his assistant were 16 km apart, how long would it take light to make the round-trip? How does this time compare with reaction times of about 0.4 s?

**Retired 71 years old**

If I borrowed $78,000 from a bank and had perfect credit; How much interest would I have to pay in Dollars and cents? The loan is for 7 years

**English**

Rewrite the passage below correcting any errors of grammar and usage The mechanic drove out the car to Joe that was lubricated. As a matter of fact, he has not done enough on it as Joe has expected. But whatever it was he decides to take it like that. The experience with the ...

**geometry**

What happened when two fruit companies merged?

**Geometry**

Name the properties that justify the steps taken. AB=EF; thereforeAB+CD=EF+CD

**Physics**

What is the fundamental frequency for a 62 cm banjo string if the speed of waves on the string is 470 m/s?

**Physics**

How long is a wavelength of infrasound with a frequency of 4 Hz?

**Physics**

Radio waves travel at the speed of light, which is 3.00 108 m/s. What is the wavelength for a FM station broadcasting at 105.9 MHz (the prefix M is "mega" and means 106)?

**Physics**

What is the maximum total force exerted on a 78 kg astronaut by her seat during the launch of the Space Shuttle?

**statistics**

the mean is based off of 3 months. multiply it out to get the mean for a correct time period (1.5x4=6). I use the Poisson function in excel. Mean is equal to 6 and x is equal to 12 and 0. True is up to a certain number (up to 12) and false is exactly a certain number (exactly ...

**Chemistry**

Well Kae, 3KOH + Fe(NO3)3 -> 3KNO3 + Fe(OH)3

**physics**

A student of weight 990 N was sent to another planet called Nerdland. If Nerdland has a mass that is three times the mass of the earth and a radius that is half the radius of the earth, what would be the mass in kg of the student when on Nerdland?

**math**

a 4 digit number my 2 nd digitis twice my 3 digit the sum of all my digits is 3 times greater than my last digit the productof my 3rd and 4th digits is 12 times greater than the ratio of my 2nd to 3rd whats my number?

**math**

solve by the elimination method: 9x-9y=18 7y-3x=-8 please solve step by step thank you for your help

**chemistry**

Calculate the number of moles of FeSO4 in 25cm3 of a 0.2mol dm3 solution

**Chemistry**

A gas has a volume of 50.0 cm3 at a temperature of -73°C. What volume would the gas occupy at a temperature of -123°C if the pressure stays constant

**math**

The best answer is D - 6. The two negatives cancel each other out, making the sum 18 divided by 3, equaling 6.

**college chem**

The cation M2+ reacts with NH3 to form a series of complex ions as follows: M2+ + NH3 M(NH3)2+ K1 = 102 M(NH3)2+ + NH3 M(NH3)2 2+ K2 = 103 M(NH3)2 2+ + NH3 M(NH3)3 2+ K3 = 102 A 1.0 × 10–3 mol sample of M(NO3)2 is added to 1.0 L of 15.0 M NH3 (Kb = 1.8 × 10&#...

**physics**

What is the average current through a conductor that carries 4 375C during a 2 min time period?

**english**

What opinion might they have of the author? What could you as a writer do to prevent this problem?

**english**

How might readers react if the topic sentences in an essay did not coincide with the supporting points, and why would their reaction be justified?

**business**

Direct verse indirect cost Estep Construction Company is composed of two divisions: (1) Home Construction and (2) Commercial Construction .The Home Construction Division is in the process of building 12 houses and the Commercial Division is working on 3 projects. Cost items of...

**chem101**

propyl Bromide reacts with Mg, Propanone, H+ to yeild what?

**chem101**

Hydrogen gas can be produced in the lab by the reaction of magnesium metal and hydrochloric acid. Mg + 2 HC -> MgCl2 + H2 How many grams of hydrogen gas will be produce if 5.00 g of magnesium metal is dissolved in excess acid.

**Chemistry-102**

so whats the answer,

**The world History**

where are the questions to assignments 1-5 world history number007678

**chem**

What is the [OH-] for a solution at 25°C that has [H3O+] = 8.23 × 10-2 M?

**Chemistry**

What volume of dry hydrogen would be produced under standard consitions when 0.250g of magnesium reacts with excess HCl?

**Math**

The surface area of a cylinder is 200cm. The diameter is equal to the height. Find the radius.

**Math**

The surface area of a cylinder is 200cm. The diameter is equal to the height. Find the radius.

**Math**

Do the equations x = 5y + 3 and x = 5y – 3 have the same solution? How might you explain your answer to someone who has not learned algebra?

**algebra**

what are the coordinates of the points at which the slope of the function with the equation y = x^4 - 8x^2 is equal to zero ?

**physics**

Two boxes are similar. The larger box has a volume that is 64 times the volume of the smaller box. What is the ratio of the larger box's height to the smaller box's height? write the fraction as a decimal

**3rd grade**

What is a number sentence that shows the same product as the product of 9 and 2

**chem class**

A 25.00-mL sample of 0.723 M HClO4 is titrated with a 0.273 M KOH solution. The H3O+ concentration after the addition of 10.0 mL of KOH is ???? M.

**comp**

what is the verb tense in this sentence? Education is contributing a good role of successful financial planning.

**Microeconomics**

opportunity cost of taking this trip is tavel accomandations

**5th gr ade social studies**

each european group that set up colonies settled in a specific part of americas fact

**answer**

1/m-m/2=6X+5/12

**Physics Lab I**

Let's say you measure an average acceleration to be 0.4134 ms-2. What is the height (in centimeters) of the riser block? Assume the legs of the track span 1.0000 m and that there is neither friction nor drag. Also assume the block is under one of the legs. ?? cm Use three ...

**Chemistry check my answer?**

Hi! is my answer correct? Consider the following chemical reaction: H2 (g) + I2 (g) <> 2HI (g) At equilibrium in a particular experiment, the concentrations of H2, I2, and HI were 0.15 M, 0.033 M, and 0.55 M, respectively. The value ofKeq for this reaction is I solved by...

**adult education**

we have a ring that has an indian head marking on the inside of the ring, do you know what it means, who made it, how old it is, or what its actually called so we can search the meaning ?

**5th grade**

what are 4 possible tune-ups to help you keep a postive attitude?

**math**

f(x)=ax+b f(-2)=27 and f(1)=15 find the value of x when f(x)=-5 how do you work this out?? thanks so much

**9th grade**

A square made by a length of string 8 cm long is reshaped into a circle. What is the circumference of the circle

**Real Estate Management**

$34,500

**Physics**

Wha?

**Physics**

A chain composed of four identical links is suspended by a rope and does not move. What are the forces on each chain? (include where they come from)

**accounting**

There is also a lot of companies that report their federal taxes using the accrual basis and their state taxes on the cash method. Why do you think a company would want to do this?

**college physical science**

how much would a 80.0kg person weigh on earth where the acceleration of gravity is 1.63m/s2

**college physical science**

how much would a 80.0kg person weigh on mars if the acceleration of gravity is 3.93m/s2

**college physical science**

According to table 1.3, what volume of iron would be needed to balance a 1.00cm3 sample of lead on a two pan laboratory balance? Table 1.3 shows densities g/cm3 such as iron=7.87g/cm3 and lead is 11.4g/cm3

**Physical Science**

A cubic tank holds 1,000kg of water. What are the dimensions of the tank in meters. Explain your reasoning.

**Physics**

Describe alpha, beta, and gamma rays. What exactly is each ray composed of? What are their characteristic radiation characteristics?

**Physics**

The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom. The diameter of the atom is proportional to n2, where n=1 labels the lowest or “ground” state, n=3 is the third state, and so on. If the atom’s diameter is 1x10-10m in...

**Chemistry**

A buffer prepared by mixing equal amounts of the salts Na2HPo4 and NaH2PO4 to give a total phosphate concentration of 0.1M. What is the concentration of Na ions? I believe it is 0.3M but am having trouble understanding why when I write out the dissociation of the Na2HPo4 and ...

**Chemistry**

A buffer prepared by mixing equal amounts of the salts Na2HPo4 and NaH2PO4 to give a total phosphate concentration of 0.1M. What is the concentration of Na ions? I believe it is 0.3M but am having trouble understanding why when I write out the dissociation of the Na2HPo4 and ...

**Physics**

How does one Coulomb of charge compare to the charge on an electron? How do you think such a large difference arose historically?

**Physics**

Where should most of the mass be for an industrial fly wheel? Why? can't find any thing about this in my book. need help answering this.

**math**

Hi, the £ is pound sterling and p is pence, so can be swapped for $ and c/

**math**

I am an odd multiple of 50p. My number of £s is double 18. What am I?

**Physics/ Science**

How does a derivation differ from an experiment or a theory?

**Physics**

Having trouble determ the formulas for the follow problems. 2. If an automobile travels at 30 km/hr. for 2 hours, how far does it go? 60 km 3. At time = 0 an automobile already traveling at 30 km/hr. accelerates at 3m/s2 for 2 seconds. During these two seconds, how far does it...

**physics**

An object 7.25 cm high is placed 15.1 cm from a convex mirror of radius 55.2cm. (a) What is the image distance?

**math**

3/5 + 1/10=? i got 7/10 or 12/20, which one is correct?

**music**

2. What role did Totalitarianism play in the creation of music particularly in Germany and the Soviet Union during the twentieth-century? Which composers were most affected by totalitarianism? How did affect their lives?

**reply to Q " Physics hard... can't get it right"**

kk this is what i did V=strt(3*k=8.31*T=1365)/m=5.32*10^-26

**Physics hard... can't get it right**

oo ok let me try that also can you tell me the distinction like when to use gas constant and boltzmann constant

**Physics hard... can't get it right**

strt(3 * k=8.31 * T=1365)/ m = 5.32*10^-26

**Physics hard... can't get it right**

A cylinder of compressed Oxygen is carried on a spacecraft headed for Mars. The compressed gas cylinder has a volume of 10,000 L and is filled to a pressure of 200 atm at 273 K. The maximum pressure the cylinder can hold is 1000 atm. The molar mass of Oxygen is 32 g/mol. ...

**Physics hard...**

Young's Modulus (Y) 20 X 1010 N/m2 Shear Modulus (S) 8.1 X 1010 N/m2 Bulk Modulus (B) 16 X 1010 N/m2 The table to the above represents various properties of steel. You have steel wire 4.9 meters in length that stretches 0.16 cm when subjected to a force of 400 N. What ...

**physics**

A cylinder of compressed Oxygen is carried on a spacecraft headed for Mars. The compressed gas cylinder has a volume of 10,000 L and is filled to a pressure of 200 atm at 273 K. The maximum pressure the cylinder can hold is 1000 atm. The molar mass of Oxygen is 32 g/mol. ...

**trig**

Graph three periods of the function. (identify period and phase shift and intercepts) y = f(x) = √3/2 sin(2x) - 1/2 cos(2x) if you can't graph it can you at least get it into that simpler form which is graph able.

**trig1 more question**

it is always true that if -1 ≤ x ≤ 1 then cos(Arccos(x)) = x Give an example showing that Arccos(cos(x))= x need NOT be true for all x

**Trigonometry**

Find all solutions for the following equation in the interval 0 ≤ x <2pi 3cos(3x)=6 i got cos3x=2, don't know how to go further i think it would be no solution but just want to confirm.

**physics**

20meters

**Government**

How can the actions of urban elites help explain the Great Recession?