Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 1,513

**Physics**

A cart initially at rest on a horizontal floor requires a 365N horizontal force to set it in motion. We know that the coefficient of static friction is 0.64. What is the mass of the cart?

**physics**

problem says that a cannon ball is fired at a 30 degree angle off a 10 meter high wall at 80 m/s. Use work and energy to find it's impact speed. I worked out this out with the equation: (1/2)(mass)(initial velocity)^2 + mgy = (1/2)(mass) (final velocity)^2 + mg(y final) i ...

**physics**

A hydraulic lift has two connected pistons with cross-sectional areas 5 cm2 and 350 cm2. It is filled with oil of density 740 kg/m3. a) What mass must be placed on the small piston to support a car of mass 1400 kg at equal fluid levels? 20 OK HELP: The pressure is constant at ...

**PHYSICS HELP**

The maximum lift force on a bat is proportional to the square of its flying speed v. For the hoary bat (Lasiurus cinereus), the magnitude of the lift force is given by FL (0.021 N·s2/m2)v2 The bat can fly in a horizontal circle by "banking" its wings at an ang...

**Physics**

How do I know v^2? for a)

**Physics**

The maximum lift force on a bat is proportional to the square of its flying speed v. For the hoary bat (Lasiurus cinereus), the magnitude of the lift force is given by FL (0.021 N·s2/m2)v2 The bat can fly in a horizontal circle by "banking" its wings at an ang...

**physics please hep**

Suppose that the graph of force vs. time for a very unusual spring has only straight lines. The cart hits the spring at t = 3.00 s, so force F = 0 up to that point. Then, after t = 3.00 s, the force increases linearly until it reaches a maximum at Fmax = 6.74 N at time t = 3.5...

**Math**

log base 2 (3r+5)= 5

**Math**

the 2 is the base...sorry!

**Math**

I don't understand how to solve equations with logarithms very well...can you help please? here is one im stuck on: log (3r+5)= 5 2 Thanks!!

**math**

But what is the work

**math**

If a circle is divided into 12 equal parts what is the degree measure for each of the 12 angles formed

**math**

What do they call bowling in hawaii

**math**

x/4+2x/3+x/6=1/2

**English**

How do I write my essay in third person? Just want some examples. Thanks!

**Chemistry**

Concentration of OH- left in a solution made by mixing 16.0 g of NaOH and 80.0 mL of 0.170M HNO3?

**Chemistry**

Chemical analysis of a gas shows that it contains one carbon atom for every one hydrogen atom. The densiry ofthis gas is 1.161 g/l at STP. What is the minimus oxygen volume needed at STP for the complete combustion of .500 mol of this gas?

**Physical Science**

I don't know?

**Physical Science**

I don't know?

**pre-algebra**

thanks!

**pre-algebra**

when i tried to simplify more, i came out with -1w...so i think so.

**pre-algebra**

can I simplify -4w/4 <--anymore than that?

**pre-algebra**

thanks!

**pre-algebra**

simplify: (-8)(x/-2) i know that -8/-2=4, but does it come out as 4x or 4=x?

**college**

find domain of f(x)=3/x+5 + 2radical x-1

**math**

if t is 30% of u and u is 60% of v, what is the percent of v is t?

**math-College Algebra**

1.8 minutes

**physics grade 11**

A car launches itself off a 20° ramp at the top of a 25m cliff travelling at 35 m/s. How long will it be in the air for and how far from the base of the cliff will it land?

**chemistry II**

What are the steps to balancing Redox reactions using the Valence method. thanks> ex problem: NH3+O2 -->H2O +NO

**english**

What do you think are the similarities between Cathy Freeman, Deriba Merga and Oprah Winfrey? Please explain to me in details..

**Math**

3/4=x/236 cross multiply 3 and 236 and drop down the 4and x to get 4x=708 and divide 4/4 and 708/4 and get 177

**physics**

I have two equations: #1) Tcos(theta)- 6.86=0 #2) Tsin(theta) = mass X acceleration I know that my acceleration is velociy squared/ radius (my given radius is 40cm) I'm supposed to solve for T and angular acceleration. I know I'd be able to do that if I could find what...

**i dnt get it**

63

**English**

metaphors are used to relate something we don't know to something we do. we use them all the time. "Life is a journey" would be an example of a metaphor. I'm comparing the concept of life to something I'm already familiar with.

**health**

what type of structure would indicate areas of responsibility and lead to the most efficient operation of a facility?

**health **

what is the function of the CDC, WHO & local health departments?

**health**

what are the major types of hospitals and how do they differ?

**9th grade**

15.5

**physics**

A student librarian picks up a 2.2 kg book from the floor to a height of 1.10 m. He carries the book 7.8 m to the stacks and places the book on a shelf that is 0.35 m above the floor. How much work does he do on the book?

**physics**

A 5.2 kg box is on a frictionless 36 degree slope and is connected via a mass less string over a mass less, frictionless pulley to a hanging 2.1 kg weight. What is the tension in the string if the 5.2 kg box is held in place, so that it cannot move?

**Communication**

Well, theoretically they could all be correct answers depending on what kind of quirks the employer has; but B is the answer you'd want to use.

**Physics**

I'm assuming by mu you mean the coefficient of friction, u(subk) to find it just sum your forces in the x and y directions and solve for u(subk) use the formula sum of the forces = mass x acceleration

**english **

Grammar and literature.

**english **

I need a website that will help me with my english because im making a C and i dont get any of the stuff in english 2 i need lots of help. Like stuff to study.

**physical science**

Calculate (to the nearest 0.1 u) the formula mass of these compounds. (a) rubidium nitrate, RbNO3 u (b) aluminum peroxide, Al2(O2)3 u (c) water, H2O u

**physical science**

Volcanoes emit much hydrogen sulfide gas, H2S, which reacts with the oxygen in the air to form water and sulfur dioxide, SO2. Every 69 tons of H2S reacts with 97 tons of oxygen and forms 37 tons of water. How many tons of SO2 are formed

**social history hs (poverty)**

I'll check them out. I think I can work with the first site Thank you.

**social history hs (poverty)**

I can't seem to find a good website on the history of child poverty in america. I couldn't really find a good enough website that discusses the history of poverty in america. can you help me?

**algebra) **

i dont know ask google

**Chemistry**

A solution is prepared by adding 300 mL of 0.500 M NH3 and 100 mL of 0.500 M HCl. Assuming that the volumes are additive, what is the pH of the resulting mixture? Kb for ammonia is 1.8 x10 -5

**french**

I don't understand this. Can anyone help me out? Thanks! Les pronoms employes avec les verbes de communication. Remplace le nom de la personne (ou le pronom) par le pronum correct. 1) Vous demandez a votre mere de vous attendre. Vous ______ demandez de vous attendre. 2) No...

**Physics**

A 4kg wooden block is placed on a wooden table, so the coeficent of friction would be 0.2. There is a string connected to both sides of the wooden block with a pulley system at the end of the table to go off and then each string has a different weight attached to it. On the le...

**science**

how are the biosphere and the cryosphere the same or similiar

**English**

What writing techniques reinforce the message? :)

**English**

For the poem, "Remember?" by Alice Walker, What is poem's message?

**ecology**

thank you!!!!!!

**ecology**

what is a long-term change that takes place in two species because of their close interactions with each other?

**english**

Read the poem Remember ? by Alice Walker and answer the questions. -> Why is the title effective? -> What metaphor is used in the poem and what other two poetic techniques does Alice Walker use?

**probability**

A box of 6 coins (penny, nickel, dime or quarter) worth $0.67 is shaken. What is the probability that a nickel is drawn first and then a quarter? Assume no replacement and that all coins are equally likely.

**probability**

The letters of the word Mississippi are placed in a hat. What is the probability that the first two letters drawn are both i if the first letter drawn is not replaced?

**College Chemistry**

Pb^2+(aq)+SO4^2-(aq) --> PbSO4(s)

**1th phyics**

A car traveling at 7.5 m/s accelerates 3.4m/s2 to reach a speed of 15.0 m/s. How long does it take for this acceleration to occur?

**11th phyics**

An automobile with an initial speed of 4.56 m/s accelerates uniformly at the rate of 2.4 m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s

**social services hs**

phew! thanks :)

**social services hs**

I was wondering how someone could qualify for SRS services? SRS is social rehabilitation services... like food stamps, drug or alcohol rehab, finding child care, disability services, finding mental health services...etc I was going to call my local srs office but its too late ...

**11th grade**

An automobile with an initial speed of 4.56 m/s accelerates uniformly at the rate of 2.4 m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s. (part 2 of 2) Find the displacement of the car after 4.4 s. Answer in units of m.

**11th grade**

11th grade phyics

**11th grade**

An automobile with an initial speed of 4.56m/s accelerates uniformly at the rate of 2.4m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s.

**11th grade**

When Maggie applies the brakes of her car,the car slows uniformly from 15.4 m/s to 0m/s in 2.41 s.How far ahead of a stop sign must she apply her brakes in order to stop at the sign?Answer in units of m.

**11th grade**

When the shuttle bus comes to a sudden stop to avoid hitting a dog, it decelerates uniformly at 3.8 m/s2 as it slows from 8.8 m/s to 0 m/s. Find the time interval of acceleration for the bus. Answer in units of s.

**11th grade**

When Maggie applies the brakes of her car, the car slows uniformly from 15.4 m/s to 0 m/s in 2.41 s. How far ahead of a stop sign must she apply her brakes in order to stop at the sign? Answer in units of m.

**11th grade**

When the shuttle bus comes to a sudden stop to avoid hitting a dog, it decelerates uniformly at 3.8 m/s2 as it slows from 8.8 m/s to 0 m/s. Find the time interval of acceleration for the bus. Answer in units of s.

**11th grade**

A flowerpot falls from a window sill 38.8 m above the sidewalk. What is the velocity of the flowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s. How much time does a passerby on the side- walk below have to move out of the wa...

**11th grade**

The total trip on the bus took 6.66 h The average velociity was 60km/h

**11th grade**

A bus travel 250km south along a straight path with the average velocity of 84km/h to the the bus stop for 26 min. Then in it travel 240km with avrage 70km/h to the south.How long long did the hold trip take? What is the average velocity of the trip?

**physics**

A bus travels 250 km south along a straightpath with an average velocity of 84 km/h to the south. The bus stops for 26 min, then it travels 240 km south with an average velocity of 70 km/h to the south. How long does the total trip last?

**science**

which is higher 10degrees north or 65 degrees north?

**science weather**

would you expect to find a greater variety of climates on a hill at 11degreesN or at 65degreesN? whyyy? :)

**Chemistry**

5.00 g is equal to how many pounds?

**western civilization**

Describe the rise of Louis Napoleon and explain why and how he was able to have such an influence on France at the middle of the 19th century?

**english**

Reply to writearcher: Umm...north America, USA

**english**

Hey, I have to wright a SA on what I want to learn in English language arts this year. It's a full page SA and I'm in 7th grade. Please help me, Ive ben working on it bacicaly ever since I got home. I need help, PLEASE!!!

**physics**

A car starts from rest and travels for 4.9 s with a uniform acceleration of +1.8 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.7 m/s2. The breaks are applied for 1.50 s. 1) How fast is the car going at the end of the breaking period? 2) How far...

**world history**

Over the next two years I will be writing a 4000 word essay on a narrowly focused topic of my choice. I would prefer to do something in history, although there are plenty of other catagories in which my research question may be submitted. I would greatly appreciate any ideas f...

**MATH**

MACHO ATE 125 HOT DOGS OVER A FIVE DAY PERIOD. EACH DAY HE AT SEVEN MORE HOT DOGS THAN ON THE PREVIOUS DAY. HOW MANY HOT DOGS DID HE EAT ON THE FIRST DAY?

**Science**

A model rocket is launched straight upward with an initial speed of 30.0 m/s. It accelerates with a constant upward acceleration of 2.50 m/s2 until its engines stop at an altitude of 160 m. A. what is the maximum height reached by the rocket? B. how long does the rocket stay i...

**6th grade**

MACHO ATE 125 HOT DOGS OVER A FIVE DAY PERIOD. EACH DAY HE ATE SEVEN MORE HOTS THAN ON THE PREVIOUS DAY HOW MAY HOT DOGS DI HE EAT ON THE FIRST DAT

**Management**

Does anyone have a historical example of an ethical dilemma that deals with global business. Any example will be helpful and I can then google the details. Thx!

**11th grade**

the measure of an angle is 8 degrees less than 3 times the measure of the angle's supplement. find the measure of each angle

**algebra and trigonometry**

if 9<1/2X how do you graph that on a number line?

**chemistry**

Is this the answer? .737g/mL*1mL/0.000264...gal*12.9 gal=36012.5

**english**

What is the figurative language for this phrase? " I want a lodge that is round like the sun and the path of the stars. I want a lodge that is like the good things that have no end."

**MATH HELP!!!**

thank you so much.. it really helped but i have one more, The hypotenuse of a right triangle is 5 inches. If one leg is 2 inches, find the degree measure of each angle. A. 42.4° and 47.6° B.12.2° and 77.8° C. 23.6° and 66.4° D.16.7° and 73.2°

**MATH HELP!!!**

Given a right triangle with a side of length 4 and a hypotenuse of length 7, find the measure of the two acute angles. (Round to the nearest hundredth.)

**Math**

Find all integer roots of f(x). Identify any double roots. f(x) = 3x4 - 16x3 + 31x2 - 26x + 8

**Math**

Find all integer roots of f(x). Identify any double roots. f(x) = 2x4 + 11x3 + 13x2 - 11x - 15

**Chemistry**

Calculate Delta H for 4NH3 + 5O2 --> 4NO + 6H2O using: N2 +O2 --> 2NO DH= -180.5 kJ N2 + 3H2 --> 2NH3 DH= -91.8 kJ 2H2 + O2 --> 2H2O DH= -483.6 kJ

**MATH**

Which function Is even? a. f(x) = √x - 3 b.f(x) = 3√x c. f(x) = |x| + 4 I keep getting neither even or odd. HELP PLEASE...

**English**

oh, and by the way, LOTF stands for Lord of the Flies, and AF is Animal Farm :p

**English**

Tomorrow for my english exam we are expected to write an in class comparative essay on LOTF vs. AF. We have to compare the similarities between the two. The similar aspect I have chosen to write about is fear, and how it is used for control. For my first two paragraphs I have ...

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