# Posts by Maria

Total # Posts: 2,003

**Physics**

A racket exerted an average force of 152.0 N on a ball initially at rest. If the ball has a mass of 0.070 kg and was in contact with the racket for 0.030 s, what was the kinetic energy of the ball as it left the racket?

**chemistry**

You are given an organic solution which reacts with most organic solvents. how would you obtain the IR spectrum of it?

**English**

i just took the test 1. C 2. B 3. A 4. D (Turd's Answers are 4/4)

**Chemistry**

What is the equilibrium equation for FeS(s) + 2H3O+(aq) - Fe2+(aq) + H2S(aq) + 2H2O(l) ? Explain if possible !

**physics**

A 15.0cm object is placed 60.0cm from a convex lens which has a focal lenght of 15.0cm use the thin lens equation to find the distance of the image (60)1/15=1/60+1/60(1/15)=1-1+1/d

**math**

Suppose you want to build an outdoor rectangular pen enclosed by fencing for a pet. You want the pen to have an area of 64 square feet. Write and post one set of dimensions that could be used for the pen, along with the perimeter of the pen.

**Physics**

If a 0.50-kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of 8.0 N for a distance of 4 m, then what would be the block's velocity?

**writting skills**

I got Number 11 wrong on that question they said it was not C.

**Math**

Thank you

**Math**

What value of x makes this equation true? 1/3(9x-2)+1=2(4x+1) a) x=-3 b)x=-1/3 c)x=1/3 d)x=3 Please explain. Having a hard time figuring out.

**math**

charlie says that y=2x squared is not a function because the same y-value sometimes corresponds to more than one x-value. Is charlie correct

**Chemistry**

C18H32O2 + 2H2 - C18H3602; oxidized or reduced?

**Algebra**

@Ms.Sue

**Algebra**

1. If m∠1=37º , what is m∠4? a) 53º b) 43º c) 37º d) 27º 2. If m∠1=50º , what is m∠5? a) 50º b) 40º c) 35º d) 25º 3. If m∠4=25º , what is m∠8? a) 105º b) 75º c) 175º d) 25...

**math**

the scale listed on the box containing a model ship is 1 inch to 8 feet. which proportion can be used to find the actual length of the ship if the length of the model is 5 feet

**physics**

You're in an airplane that flies horizontally with speed 830km/h (230m/s ) when an engine falls off. Neglecting air resistance, assume it takes 35s for the engine to hit the ground. Find the height of airplane. Find the horizontal distance that the aircraft engine falls.

**math**

Why wasn't cross multiplication used. Five editors finish a project in 3 1/2 weeks. How many editors are needed to complete the same project in 1 1/6 weeks 5/3.5= x/1.16

**math**

Is there some other way I can explain this to my 8th grader. Five editors finish a project in 3 1/2 weeks. How many editors are needed to complete the same project in 1 1/6 weeks

**math proportions**

Five editors finish a project in 3 1/2 weeks. How many editors are needed to complete the same project in 1 1/6 weeks?

**TMCC**

Donna has scored 73 , 82 , 71 , 79 , and 69 on her previous five tests. What score does she need on her next test so that her average (mean) is 75 ?

**Chemistry**

Thank you!

**Chemistry**

I think I have worked out the answers - the volume of carbon dioxide would be 20dm3 and the volume of oxygen required would be 40dm3. Please let me know if I am incorrect. Thank you.

**Chemistry**

If 20dm3 methane was burned in pure oxygen: CH4(g) + 2O2(g) arrow CO2(g) + 2H2O(l) how do I work out the volume of carbon dioxide made? And what volume of oxygen would be required? Thank you.

**English**

Are you asking if the sentence is a question? If so, then no it isn't a question.....

**application of differential equation**

somebody please help me find the solution totally lost.... An object of mass 100g is thrown vertically upward from a point 60cm above the earths surface with an initial velocity of 150cm/sec. It rises briefly and then falls vertically to the earth, all of which time it is ...

**application of differential equation**

An object of mass 100g is thrown vertically upward from a point 60cm above the earths surface with an initial velocity of 150cm/sec. It rises briefly and then falls vertically to the earth, all of which time it is acted on by air resistance that is numerically equal to 200v (...

**Perimeter**

Lamar made a garden in the shape of a rectangle with an area of 36 square feet. The shorter side of the garden measures 4 feet. Explain how you can find the perimeter of the garden.

**Math 5th grade**

Thank you.

**Math 5th grade**

John brings fruit punch to a school party. He brings 6 gallons of fruit punch but the students only drink 3/4 of it. How much did they drink?

**maths please help and explain**

1.evaluate without using a calculator 2logx+1=log900 2.solve the following equation A. 3log(x-2)=4.714 B. 16^x-3 = 8^2x+1 C.10^2x=1/100

**math**

In 2000, about 51% of the 280,000,000 US citizens were women. Their median age was 36.6. About how many of these women were younger than age 36.6?

**Chemistrhy 110**

How many grams of Na2CO3 must be dissolved in 3.75 L of aqueous solution to yield a molar concentration of 1.75 molar?

**math**

Zusie uses 1/2 to help compare 1/3 to 3/5 and to help in comparing 3/7 with 2/3.explain how 1/2 help determine.wich fraction is greater in each combination

**L.A**

1B 2A 3D 4C hope it helps i got a 100%

**math**

no

**science**

Coefficient of friction is 13.0? Am I correct?

**science**

A body with a mass of 490kg is pulled along a horizontal plane at a constant velocity.the pulling force is 1.2 kN is making an angle of 20degrees with the plane. A.determine the coefficient of friction

**science**

1 . A body with a mass of 490kg is pulled along a horizontal plane at a constant velocity.the pulling force is 1.2 kN is making an angle of 20degrees with the plane. A.determine the coefficient of friction

**Organic Chemistry**

So, eclipsed with the methane on C2 and the rest of the chain (CH2CH3) on C3 in the same relative "position"?

**Organic Chemistry**

Looking down C2-C3 of 2-methylpentane, is the first newman projection staggered or eclipsed?

**Math**

It's an irregular hexagon. The base of the hexagon is 12m, the length of one side is 9m, the length of the other sides are 5m, and 4m, the width of the other sides are 7m and 5m. What is the area of the hexagon ?

**math**

it's an irregular hexagon. the base of the hexagon is 12m, the length of one side is 9m, the length of the other sides are 5m, and 4m, the width of the other sides are 7m and 5m

**math**

it's an irregular hexagon. the base of the hexagon is 12m, the length of one side is 9m, the length of the other sides are 5m, and 4m, the width of the other sides are 7m and 5m

**math**

what is the area of a hexagon with sides 5m, 4m, 5m, 9m, 7m and 12m

**math**

0.6 divided by (0.4 x 0.5)

**math**

In a bag are three red marbles and three green marbles. If two marbles are drawn from the bag at the same time, what is the probability that both marbles will be red?

**math**

explain comparing fractions 21/25?

**physics**

if a 400g ball moving 1.2 m/s [north], receives an impulse that changes its direction and speed to 2.8 m/s [east], what is the change of momentum?

**physics**

a regulation golf ball has a mass of 45.0 grams. a golf ball is dropped from a height of .305 m and it strikes the floor with a velocity of 2.35 m/s [down]. if the velocity of the ball as it leaves the floor is 2.15 m/s [up]. determine the impulse applied to the golf ball.

**Physics**

Two people are holding up the ends of a 4.40-kg wooden board that is l = 1.95 m long. A m = 2.00-kg box sits on the board, 0.50 m from one end, as shown below. What forces do the two people exert?

**science**

If we added more mass to the blocks of wood during these lessons,how would that have changed the experiment?

**Algebra 2**

simplify each expression. rationalize all denominators. assume that all variables are positive (1-sqrt(3x))/(sqrt(6x)) Please show work!!!!

**Algebra 2**

Steve can't teach well

**Algebra 2**

solve each equation. check for extraneous solution. sqrt(3x+4)-sqrt(2x-7)=3 please show work!!!!!

**Algebra 2**

solve each equation. check for extraneous solutions. sqrt(2x+1)+sqrt(2x+6)=5 please show work!!!!!

**math**

Gabe went to the amusement park with $40 to spend. His ticket cost $26.50. Write and solve an inequality to show how much he might spend on souvenirs and snack. Please tell me how you got this answer to this question.

**math**

a service of juice is 250 ml. how many servings are in a doze liters of juice?

**math**

Aaron has 5 pounds of flour. He needs 1/8 of a pound of flour to make a single cupcake. how many cupcakes can he make?

**World History**

So B is the answer?

**Math**

Netta faxed n pages from the library. The library charges $1.50 per page. Later the same day, Netta faxed n more pages from a local copy shop. The copy shop charges $1.25 per page plus a $2 convenience fee. Write and simplify an expression for the amount Netta spent on faxes ...

**Chemistry**

qs, don't we need the concentration of what's left when we use the equation? Or are they the same thing with moles?

**Chemistry**

What will the pH be if 15 mL of 0.1 M HCl are added to the buffer obtained by mixing 70 mL of 0.5 M CH3NH2 and 30 mL of 1.0 M CH3NH3+Cl-? (Kb for CH3NH2 is: 5.2 x 10-4 ) I'm having a hard time figuring out what to do first. is the ICE table come in handy for this? Can you ...

**math**

Susan goes swimming every 4 days, Jackie goes every 6 days and Lisa goes every 10 days. how many days later will they go swimming together

**science**

What are some arguments against extending human life? Please describe at least one objection and one objection from your research and experience.

**Math**

Find the vertex: -1/4x^2+9/5x+2

**Math**

so b) will be g3 and c) will be d represents dollars per gallon and g represent gallons of gas? What else? Can you please check my answers, thank you very much.

**Math**

Mia buys 3 gallons of gas that costs d dollars per gallon. Bob buys g gallons of gas that costs $3 per gallon. a) Write an expression for the amount Mia pays for the gas. b) Write an expression for the amount Bob pays for the gas. c) What do the numeral and the variable ...

**businesss**

what does franchiser and franchisee mean and what are their defintions

**Bussiness**

could you give me the definitions for these two and could tell me the disadvantages and the advantages -franchiser -franchisee

**math**

-1

**ELEMEMTARY MATH**

12 = √4 x √3 2. and because 4 is a square number it can be squared to 2 √12 = 2√3 3. and because 3 can't be square rooted you just leave it so your answer will be √12 = 2√3

**Applied Chemistry Project Help!!!**

Research and describe one current application of the knowledge of the atom. This application can be in any field of your choice. This means the field can be scientific, such as medicine, or nonscientific, such as entertainment. The purpose of this assignment is to learn the ...

**physical science**

For questions #14 – 16, write an equation for the reaction of magnesium oxide with sodium chloride to produce magnesium chloride and sodium oxide. 14. Show the formulas of the reactants. 15. Show the formulas of the products. 16. Write the balanced the equation for this ...

**Finance**

Fjord Luxury Liners has preferred shares outstanding that pay an annual dividend equal to $7 per year. If the current price of Fjord preferred shares is $94, what is the after-tax cost of preferred stock for Fjord?

**math**

A company rents its care for a daily fee, plus an additional charge per miles driven. Trip one is 4 days, 450 miles, and cost $244.50 for the rental. Trip two is 3 days, 200 miles and cost 149.00 for the rental. Find the daily fee, and find the mileage charge. I don't know...

**Math**

a.30

**GEOMETRY**

THE area of circle B is 25 times greater than the area of circle A. The radius of circle A is 3. What is the radius of circle B?

**statistics**

Random sample of 17 HMO was selected. For each HMO the copy's for a doctors visit was recorded as 9,7,10,9,8,12,6,5,5,11,7,6,7,10,12,8,6 with s 95% confidence interval for the mean co payment

**physics**

A weightlifter has a basal metabolic rate of 64.6 W. As he is working out, his metabolic rate increases by about 650 W. (a) How many hours does it take him to work off a 450 Calorie bagel if he stays in bed all day? (b) How long does it take him if he's working out? (c) ...

**College Physics**

Thank you i tried doing it a million different ways but kept making a mistake somewhere i really appreciate it this truly helped me understand.

**College Physics**

A weightlifter has a basal metabolic rate of 64.6 W. As he is working out, his metabolic rate increases by about 650 W. (a) How many hours does it take him to work off a 450 Calorie bagel if he stays in bed all day? (b) How long does it take him if he's working out? (c) ...

**College Physics**

(a) How many hours does it take him to work off a 450 Calorie bagel if he stays in bed all day? (b) How long does it take him if he's working out? 2 h (c) Calculate the amount of mechanical work necessary to lift a 126 kg barbell 2.10 m. 3 J (d) He drops the barbell to the...

**physics**

an ice skater applies a horizontal force to a 20 kg block on frictionless, level ice causing the block to accelerate uniformly at 1.4 m/s^2 to the right. after the skater stops pushing the block it slides onto a region of ice that is covered with a thin layer of sand. the ...

**math**

9i / -3+8i

**Physics**

A sample contains 3.5×1019 radioactive atoms with a half life of 10000 years. How many atoms are expected to decay in the first second? After waiting 10000 years, how many atoms are expected to decay in the next second?

**math**

Find all zeros. Real and Imaginary f(x)= 5x^4 + 16x^2 + 3

**math**

find the inverse. f(x)=√3+4

**math**

Find the inverse f(x)= -2+7

**math**

(2+3i) / (4-2i)

**math**

Find the inverse of f(x) f(x)=3-1/2x

**college algebra**

Find Functions with Given Zeros √2, -√2, 3

**College Algebra**

-6 - radical 10 / 3+8 radical 10

**Math**

The percentage of people not covered by health care insurance in 2003 was 15.6% (Statistical Abstract of the United States, 2006). A congressional committee has been charged with conducting a sample survey to obtain more current information. a. What sample size would you ...

**calculus**

The Voltage v , Current I and Resistance R are related by the equation V=IR. Suppose that V is increasing at a rate of 2 volt/sec, while I is decreasing of the rate of 1/5 (amp/sec ). Let t denote time in seconds. Find the rate at which R is changing when V=40volts and 1=2 amp .

**calculus**

The Voltage v , Current I and Resistance R are related by the equation V=IR. Suppose that V is increasing at a rate of 2 volt/sec, while I is decreasing of the rate of 1/5 (amp/sec ). Let t denote time in seconds. Find the rate at which R is changing when V=40volts and 1=2 amp .

**Six Grade Math**

The answer is 32

**Global terrorism**

What effect has the 1991 gulf war had on current day terrorism ?

**Chemistry**

The ionic compund sometimes called yellow uranium is used to produce colored glazes for ceramics. It is 7.252% sodium, 75.084% uranium, and 17.664% oxygen a. What is the empirical formula for this compound? b. This compound has a molecular mass of 1268.06 g/mol, what is the ...

**chemistry**

The ionic compund sometimes called yellow uranium is used to produce colored glazes for ceramics. It is 7.252% sodium, 75.084% uranium, 17.664% oxygen? a. What is the empirical formula for this compound? b. This compound has a molecular mass of 1268.06 g/mol, what is the ...