Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 723

**Finance**

Suppose your bank account will be worth $4,200.00 in one year. The interest rate (discount rate) that the bank pays is 5%. What is the present value of your bank account today?

**Physical Chemistry**

Calculate the value of the change in enthalpy(H) when the temperature of 1 mole of a monatomic gas is increased from 25C to 300C.

**algebra**

how to make a 4x4 magic sqaure which equals 18

**Physics**

The string of a conical pendulum is 54.5 cm long and the mass of the bob is 0.22 kg. a) Find the angle between the string and the horizontal when the tension in the string is three times the weight of the bob. b)Under those conditions, what is the period of the pendulum?

**Physics**

A mass m1 on a horizontal shelf is attached by a thin string that passes over a frictionless pulley to a 2.5 kg mass (m2) that hangs over the side of the shelf 1.2 m above the ground. The system is released from rest at t = 0 and the 2.5 kg mass strikes the ground at t = 0.82 ...

**chemistry**

12.2

**Physics**

(b) What is the acceleration of the ball if an upward force of 64 N is applied?

**math**

a shot is released at a height of 1.89m, with a speed of 13m/s and at an angle of 34 degrees. Calculate the maximum height reached and the time at which this occurs, the range and the time of flight, and the optimum projection angle.

**biomechanics**

a shot is released at a height of 1.89m, with a speed of 13m/s and at an angle of 34 degrees. Calculate the maximum height reached and the time at which this occurs, the range and the time of flight, and the optimum projection angle.

**physics**

A tiger leaps horizontally from a 15.0 m high rock with a speed of 7.10 m/s. How far (in meters) from the base of the rock will it land? so using the equation h=1/2 gt^2 and i put in 15 for h and g is 9.8 so i solve for t. is this right and when do i use the 7.10 m/s

**physics**

so does that mean vf is zero, vi is 29.69848481, and g is 9.8

**physics**

A golfer drives a ball with a velocity of 42 m/s at an angle of 45 degrees above the horizontal. What is the maximum height (in meters) of the ball above the level fairway?

**physics**

so h is 15, g is 9.8 15= 4.9t^2 then take the square root of 3.061. then do i multiply by 15?

**physics**

is g negative or positive, because that is what i did and the answer is still wrong!

**goverment**

Federal regulatory agencies have responsibility primarily in the area of

**Physics**

A circular automobile racetrack is banked at an angle theta such that no friction between road and tires is required when a car travels at 28.0 m/s. If the radius of the track is 390 m, determine theta .

**calculus**

Parametrize the curve of intersection of x = -y^2 - z^2 and z = y.

**Chemistry**

What is the empirical formula if given c-.1929 h-.01079 o-.08566 cl-.1898

**chemistry **

The electrochemical cell described by the balanced chemical equation has a standard emf (electromotive force) of -4.05 V. Calculate the maximum electrical work (kJ) the cell has done if 6.8500 mol of F2(g) (Molar Mass - 38.00 g/mol) forms. Round your answer to 3 significant fi...

**Chemistry**

Thank you so much :)

**Chemistry **

If the initial concentration of NH3(g) is 4.643 mol/L, calculate the % of NH3(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kc at 773.0 K is 16.70. The initial concentration of the reaction products is 0 mol/L. 2NH3(g) = N...

**physics**

2.7

**Physics 1**

12000j

**math**

112-49=63 63/(7+7) = 63/14 =4.5 4.5+ (8-2)^2 4.5+ 6^2 40.5 jeeze this was easy,how old are you, 3??

**physics**

you can use the max height for parabloic path equation.look it up on google you lazy bum!

**physics**

the answer is dragonballs....simple as that.

**Science**

When plants die, what happen to carbon dioxide? They would be more co2 or less?

**Math**

Round 50.4 square miles to the nearest Square mile

**Math**

Construct a grouped frequency distribution for the following 28 scores using a class width of 4: 64 63 58 46 52 62 47 49 56 47 43 41 45 51 60 62 51 61 50 55 56 53 54 58 48 48 58 46

**physicsssss**

1- d= 270 2- speed= 73

**physics**

-2.7 cm/s

**Physics 1**

A mass of 5.2 kg lies at the top of a frictionless incline. It is inclined at an angle such that the normal force on the mass is 29 Newtons. If the length of the incline is 78 meters and the mass is originally at rest at the top of the incline and then released, how long does ...

**Physics 1**

A mass of 5 kg lies on a frictionless, horizontal floor. A force of 135 Newtons is applied to the mass at an angle above the positive x axis and a force of 14 Newtons is applied to the mass at an angle of 22.8 degrees below the negative x direction (see sketch). If the angle f...

**chemistry**

What is the specific heat capacity of a metal if it requires 176.1 J to change the temperature of 15.0 g of the metal from 25.00°C to 30.00°C?

**math**

three men and their wives were given $5400. the wives together received $2400. sue had $200 more than jan, and ellen had 200 more then sue. who was married to whom?

**math**

a box of munchkins contains chocolate and glazed donut holes. if Gloria ate 2 chocolate , then 1/11 of the remianing munchkins would be chocolate. if she added 4 glazed to the box, 1/7 of the box would chocolate. how many munchkins are in the original box?

**math**

peg spends $7.50 a week for grapefruit. When grapefruit are out of season, she gets 1 fewer grapefruit than when they are in season. If the price decreases by $3 per dozen in season, how many dollars will it cost her to buy a dozen grapefruit out of season?

**Physics help!**

F= ma= Tension-Weight ma+Weight=Tension (4125kg)(0.0300 * 9.8)+ (4125kg)(9.81)=Tension Calculate and this will give you the answer for maximum force. For part (2) You have to subtract them (ma-weight)

**geometry**

This circle has a circumference of 56. What is the radius of the circle?

**math**

describe all the numbers when rounded to 312,000

**MATH**

USING AM IMAGINARY FIGURE OF $19,250.00 AS AN ANNUAL INCOME FIGURE, HOW MUCH MONEY COULD YOU SAVE A YEAR IF YOU BUDGETED HALF OF 2.4%?

**math**

You have 2 floors, and there are 14 steps inbetween the two floors. you have a cat that can get to the top by either taking one step at a time or two steps. ( at one time going up the cat can take both one or two steps). How many possible combinations are there for the cat to ...

**geometry**

Given ABCD, solve for x.

**geometry**

Line e bisects line xy at m and divides line xy into two equal parts. name a pair of congruent segments.

**chemistry**

sorry. The reaction is: 2 NO(g) + Cl2 ---><--- 2NOCl deltaH is the heat of reaction deltaS is the change in entropy T is temperature in kelvin deltaG is a direct measure of spontaneity DeltaH (kJ/mol) 2NO= 90.29/mol DeltaH (kJ/mol) Cl2= 0 DeltaH (kJ/mol) 2NOCl= 51.71/mol...

**chemistry**

Gibbs free energy What is the equilibrium constant at 25 C? deltaG= deltaH - (T(K)+deltaS) deltaS= -121.1 deltaH= -77.36 so at 25 C deltaG = -77.36 - (298*(-121.1)) deltaG ~ 3.6*(10^4) so my question is: what *is* the equilibrium constant, or perhaps more accurately, how does ...

**rate of reaction (formatted repost)**

I can't get my table to line up so I've surrounded the values in curly brackets. Experiment [SO2]i [O2]i IRD O2 {1} {0.05} {0.05} {7.3*[10^(-2)]} {2} {0.10} {0.05} {2.9*[10^(-2)]} {3} {0.10} {0.15} {2.6*[10^(-1)]} {4} {0.12} {0.12} {?????????????} so overall oreder is ...

**rate of reaction**

What is the initial rate of *appearance* of SO3(g)? a reaction and table are given: reaction: 2S02(g)+O2 -------> 2 SO3(g) Table note: i= initial, IRD= initial rate of disappearance; concentrations given in molarity (M) IRD given in M/s. Experiment [SO2]i [O2]i IRD O2 1 0.0...

**math**

Express the volume of a rectangular solid (box) whose height, width and length are x,2x and 3x, respectively, as a function of its width.

**Psychology **

While all four are definitions of a mental disorder, the correct answer is D.

**physics**

a driver releases an air bubble of volume 2.0 cm^3 from a depth of 15 m below the surface of a lake where the temperature is 70C.

**chemistry**

13.88 mol oxygen

**Education**

So are the answers B, and D

**chemistry**

Is there a relationship between HOMO & LUMO and bonding & antibonding? Explain.

**PHYSICS**

Its actually FFTF, thanks for the help

**PHYSICS**

A) As a wind instrument warms up, the resonant frequencies of the instrument tend to slightly decrease. B) If the air in a concert hall warms up, the resonant frequencies of the string instruments will change precisely the same as the resonant frequencies of the wind instrumen...

**Chemistry**

30g

**Chemistry**

30g

**Chemistry**

30g

**Chemistry**

30g

**calculus**

A rectangular box is to be constructed from two different materials. The box will have a square base and open top. The material for the bottom costs $4.25/m2. The material for the sides costs $2.50/m2. Find the dimensions of the box with the largest volume if the budget is $50...

**math**

A circular pie with a diameter of 9.8 inches is cut into 7 equal slices. What is the approximate area of one slice?

**math**

Denisha used 9 balls of clay and 16 straws to make a solid pyramid.how many faces does the solid have?

**physics**

An object traveling 200 feet per second slows to 50 feet per second in 5 seconds. Calculate the acceleration of the object.

**math**

What is the degree of the 3rd angle if the other two are 68 degrees?

**Math**

20(1/5n - 3/4) + 9n

**physics**

0.35

**coordinate geometry**

all i gotta do is find slope & y intercept this is 6th math

**coordinate geometry**

some smart person solve thiss ;] y-18x+18=4 or help me im confused

**chemistry**

The simple rule “Like dissolves like” is often used to describe the solubility of a substance in different solvents. Write a short paragraph discussing your evidence for this rule. Include in your discussion where you think this rule works best and where it seems to ...

**Physics**

A 55.0 kg girl is roping through the top of a tiny tree. She quickly swings down from her 12.0 m high perch and grabs a 21.0 kg dog as she swings. They barely swing back up to a tree limb. How high is this tree limb?

**physics-mechanics**

A high-speed test track for cars has a curved section — an arc of a circle of radius R = 1440 m. The curved section is banked at angle a = 19.1 degrees from the horizontal to help the cars to stay in the road while moving at high speeds. The acceleration of gravity is 9.8...

**Math**

Need help solving this problem. If there's an equation at the end, need help in how to solve that also. Compounded interest problem. Principal $825. Rate 4%. Compounded Annually. Time 10 years.

**j**

What were the factors that played a significant role in the collapse of Russian control over Eastern Europe?

**arithmetic**

How do I solve these questions? 3 1/3 - 2 2/5= 2.75 + .003 + .158 = 7/20 is equal to ? What is the value of the expression 2x2+ 3xy – 4y2 when x = 2 and y = - 4? 16x - 8 = If 2x – 3(x + 4) = - 5, then x = – 3(5 – 6) – 4(2 – 3) =

**Calculus**

find lim f(x) - lim f(x) x->infinity x->-infinity if f(x)=ln (x+sqrt[x^2+a^2])/(x+sqrt[x^2+b^2]) a and b are real numbers

**Calculus**

find lim f(x) - lim f(x)

**Physical Science**

If a person is traveling at a rate of seventy five miles per hour in a straight line, how far would they travel in three seconds?

**comm**

extra is a adjective right???

**comm**

envelope-adverb credit-adjective spent-adverb

**comm**

came over- adjective frowning- adverb

**comm**

this is the reason why getting a credit card at a young age is not a great idea because you get anxious and want to buy a lot of things when you know you don't have the money.

**comm**

yes i do need help

**comm**

i need help identify adjectives and adverbs:My dad added me as an extra card holder on his credit cards. I was very excited that I could purchase products now and pay for them later. I didn’t realize how much money I was spending. He came over to my house recently, instan...

**physics**

Okay, I have an example problem that I'm trying to solve that comes with the answer; I'm just trying to figure out what to do. A man jogs at a speed of 1.8 m/s. His dog waits 2 s and then takes off running at a speed of 4 m/s to catch the man. How far will they have ea...

**Conductivity**

you are amazing!

**history**

Who were some of the original Texas Wildcatters?

**physics pleaaaaaaaaaaaaaaaaaaaaaaaaaaaaaase I need**

Consider a square ABCD of side 10cm and total mass 10kg. Let O be the center of the sqaure. We cut a square of corners O and C. Find the central mass of the obtained shape after removing the small cutten sqaure. I appreciate your help. thank you

**math/ physics**

Consider a square ABCD of side 10cm and total mass 10kg. Let O be the center of the sqaure. We cut a square of corners O and C. Find the central mass of the obtained shape after removing the small cutten sqaure. I would appreciate your help. thank you

**algebra**

2y-6x=8 2y=6x+8 y=3x+4 please explain this to me

**math**

i was shown example: x+6=-5 6=-5 6--5=x x=-11 please explain to me how they got this

**world history**

What are some characteristics of Greek civilizations?

**Physics**

TH/TC=(1)/(1-0.308)

**physics**

your so stupider than me if you donts know hows to do this problam!

**Europe**

what is the most important advantage og having germany in the European Union?

**math**

Hmm 12 is already an even number! Hence you should not count 12 twice, therefore answer should be 7/15. :)

**social studies**

Hi majenta, In my view a thesis statement is only good if it is properly justified. In this case, you have to clarify what you mean by "important" - which may be subjective (different people may interpret it differently) as well as rather broad. So like what I think ...

**holy name university**

Hi january, Dalton's Law of partial pressures states that P(total) = P(1) + P(2) + P(3) +....+ P(n) where 1, 2 and 3 are gases in the mixture. So applying the law 150kPa = 100kPa + 24kPa + P(oxygen) Hope I helped! (: -J

**chemistry**

Oops, sorry, my apologies for typing in caps. Was just trying to point that out. :)

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