Friday

January 30, 2015

January 30, 2015

Total # Posts: 848

**Physics**

By accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor, with v1 = 2.75 m/s and v2 = 1.65 m/s. As the plate falls, its momentum has only a vertical component, and no component parallel to the floor. After the collision, ...
*October 22, 2012*

**Physics**

A 0.014 kg bullet is fired straight up at a falling wooden block that has a mass of 4.0 kg. The bullet has a speed of 760 m/s when it strikes the block. The block originally was dropped from rest from the top of a building and had been falling for a time t when the collision ...
*October 22, 2012*

**Physics**

The lead female character in the movie Diamonds Are Forever is standing at the edge of an offshore oil rig. As she fires a gun, she is driven back over the edge and into the sea. Suppose the mass of a bullet is 0.015 kg, and its velocity is +726 m/s. Her mass (including the ...
*October 22, 2012*

**Physics**

A 42.4-kg boy, riding a 2.29-kg skateboard at a velocity of +5.37 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.30 m/s, 9.09° above the horizontal. Ignore any ...
*October 22, 2012*

**Physics**

In a science fiction novel two enemies, Bonzo and Ender, are fighting in outer space. From stationary positions they push against each other. Bonzo flies off with a velocity of +1.7 m/s, while Ender recoils with a velocity of −2.7 m/s. (b) Determine the ratio mBonzo/...
*October 22, 2012*

**Physics**

A volleyball is spiked so that its incoming velocity of +3.6 m/s is changed to an outgoing velocity of -16 m/s. The mass of the volleyball is 0.27 kg. What impulse does the player apply to the ball? Answer will be in kg*m/s
*October 22, 2012*

**Physics**

Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by seven-time-winner Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass. (a) How much work does he do during a 145-km race in ...
*October 20, 2012*

**Physics**

The cheetah is one of the fastest-accelerating animals, because it can go from rest to 18.2 m/s (about 41 mi/h) in 2.7 s. If its mass is 114 kg, determine the average power developed by the cheetah during the acceleration phase of its motion. Express your answer in the ...
*October 20, 2012*

**Physics**

A semitrailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway-truck ramp that is inclined at an angle of 10.0° above the horizontal. The semitrailer coasts to a stop after traveling 137 m along the ramp. What was the ...
*October 20, 2012*

**Physics**

hmm this isnt the write answer, i wonder what went wrong?
*October 20, 2012*

**Physics**

The model airplane in figure below is flying at a speed of 21 m/s on a horizontal circle of radius 18 m. The mass of the plane is 0.82 kg. The person holding the guideline pulls it in until the radius becomes 11 m. The plane speeds up, and the tension in the guideline becomes ...
*October 20, 2012*

**Calculus HELP PLEASE!!!**

Find all extrema for the function y=x^5-2x^3+3 on the interval [-10...10]
*October 18, 2012*

**Calculus HELP PLEASE!!!**

Find all extrema for the function y=x^5-2x^3+3 on the interval [-10...10]
*October 18, 2012*

**Word usage**

1-c 2-b 3-a 4-b5-b6-b7-a8-c9-d10-b11-a12-b13-b14-a15-b16-a17-b18-d19-b20-c
*October 17, 2012*

**physics...PLZ HELP! =)**

A constant force acts on a moving object. The object makes a fixed magnitude of displacement in some direction. In general, in what direction is the displacement that will result in the object traveling with the least kinetic energy after the displacement occurs? A.The same ...
*October 16, 2012*

**physics..help PLZ!!**

An object undergoes a displacement while being acted on by a constant force directed to the north. The work done on this object by the force is positive during the displacement. Which statement is necessarily true about the average velocity of the object during the ...
*October 16, 2012*

**calculus**

suppose f(x) is a function such that f(3)=5, f'(3)=0, and f''(3)=3. Is the point (3, 5) a relative maximum, minimum or inflection point?
*October 15, 2012*

**Calculus**

A metal cylindrical container with an open top is to hold 1 cubic foot. If there is no waste in construction, find the dimensions which will require the least amount of material.
*October 13, 2012*

**english**

2. According to the Pardoner, what is the best way to collect money from people? (1 point) appealing to their sense of piety openly condemning avarice and greed scaring them with prospects of divine punishment
*October 6, 2012*

**art 101**

According to the author, a. the interpretation of a work of art is objective. b. a work of art may fall into more than one theme. c. it doesn’t make sense to compare art from different cultures. d. all of these are the case: the interpretation of art is objective; a work ...
*October 5, 2012*

**Physics**

A 200 block on a 54 -long string swings in a circle on a horizontal, frictionless table at 90 A) What is the speed of the block? B) What is the tension in the string?
*October 3, 2012*

**10th Grade Literary Essay**

What does F. Scott Fitzgerald suggest about the state of the American Dream, the people who pursue it, and the impact of that pursuit through his depiction of Jay Gatsby and the people in Gatsby’s life? Include specific examples, quotations, and supporting details from ...
*September 28, 2012*

**math**

i need help in math but i dont get it
*September 26, 2012*

**Calculus**

A hot air balloon headed due east at a speed of 20 miles per hour and at a constant altitude of 180 feet passes directly over an intersection. Find an expression for the balloon's distance d (measured in feet) from the intersection t minutes later.
*September 26, 2012*

**english**

The letter is written by Max. I have to identify the simple & complete subject and verb in this sentence. Along with the verb. I am very confused.
*September 16, 2012*

**Spanish**

Letters are: a m i a t a m t d r s Need to unscramble to come up with a "member of the family" Thanks!
*September 11, 2012*

**math**

y – (–19) = 25 i'm in sixth grade
*September 10, 2012*

**physics**

A motor boat heads east across a river at 5.1 m/s. The river flows south at 2.1 m/s. Calculate the resultant speed.
*September 3, 2012*

**physics**

A plane flies south at 220 km/h and is blown west by a 90. km/h wind. Calculate the resultant speed.
*September 3, 2012*

**physics**

A boat heads directly west across a river at 8.0 m/s while the river flows directly north at 2.0 m/s. Find VR.
*September 3, 2012*

**physics**

A 26 N force and a 42 N force act concurrently at point P. The larger force is directed north and the other acts toward the east. Calculate the resultant force acting on point P.
*September 3, 2012*

**physics**

A plane is moving east at 100. km/h while the air around it moves at 30. km/h east. Find VR and draw a vector sketch.
*September 3, 2012*

**physics**

A westward force of 12 N acting simultaneously with another westward force of 4.0 N. Find FR and show a vector sketch
*September 3, 2012*

**math**

with each array write the factor pair. Rember that the # of row in the array are one factor and that the # of columns in the array is the other factor. Continue to build every possible array until you have all the possible factors of the number. 14 is the number, list the factors
*August 29, 2012*

**math**

Is the product of 9 and twice m translated 9(2m) or 9(m+m)?
*August 23, 2012*

**Math**

Its basically just fractions times each other 1/2 x 1/2 x 1/2 = 1/8 Its 1 eighth probability So 0.125 Or 12.5% Or 1/8
*August 7, 2012*

**Literature**

#11 is not correct the answer would be- realism
*August 4, 2012*

**Calculus **

Use newtons method and the function f(x)=x^2-a to derive the mechanics rule. Mechanics Rule for approaching sqrt(a), a>0, is Xn+1=1/2(Xn+a/Xn), n=1,2,3,...
*July 20, 2012*

**Calculus**

Thanks!
*July 18, 2012*

**Calculus**

Find the point on the graph of function that is closest to the point. f(x)=x^2 (2,1/2)
*July 18, 2012*

**Epidemiology**

Can anyone answer this question? The prevalence of undetected diabetes in a population to be screen ed is approximately 1.5% and it is assumed that 10,000 persons will be screened. The screening test will measure blood serum glucose content. A value of 180mg% or higher is ...
*July 12, 2012*

**Calculus**

Find the critical numbers of y=x(4-x)^1/2. The answer is x=8/3 but I got x=7/2.
*July 11, 2012*

**economics**

people are more likely to vote....when?
*July 8, 2012*

**sports**

hi the questions are based on the National Governing bodies of sports development we were give a list to chose from and i picked NGB they were some of the questions
*June 21, 2012*

**sports**

hi i am having problems with a essay on national governing bodies. can you help me with-- 1. who awards it 2. how do you achieve it. 3. what are strenghts in terms of improving quality of sports development opportunities for participants 4. and weeknessess as in question 3. I ...
*June 21, 2012*

**sports**

hello can you help??? swim 21 --- how will it be measured to see if it is -- was it -- will it be a success. thanks
*June 18, 2012*

**Physics**

v = Sqrt(v1^2 + v2^2) v = sqrt(98^2 + 100^2) V = 140.01 V = 1.4 * 10^2
*June 15, 2012*

**Tangent Line Approximation**

Given that f(−0.5) = 2 fŒ(−0.5) = 4 , using a tangent line approximation you would estimate f(0) to be?
*June 5, 2012*

**Science/Physics**

Explain why a rapidly spinning gyroscope, mounted in a frame that allows it to rotate in any direction independently of the frame’s rotation, tends to maintain its axis pointed in the same direction in space. I just am not getting this!
*June 3, 2012*

**Chemistry**

Help!
*June 2, 2012*

**Chemistry**

Just to add, salicylic acid reacts with methanol to produce methyl salicylate and water.
*June 2, 2012*

**Chemistry**

In the presence of an acid catalyst, salicylic acid reacts with methanol to produce oil of wintergreen and water. If water is added to the solution, a precipitate is formed. Identify the precipitate and explain why it is formed. Don't understand...!
*June 2, 2012*

**Calculus**

What is the limit of the following equation? Limit as x approaches infinity of ((e^x) - ln(x)) / (x^3)
*May 31, 2012*

**Health**

The 2010 Dietary Guidelines for Americans recommends that in managing one’s weight, a person should balance calories with…? A. Healthy eating B. Physical activity C. Educating oneself about health and wellness D. Community involvement c
*May 24, 2012*

**Health**

The 2010 Dietary Guidelines for Americans recommends that in managing one’s weight, a person should balance calories with…? A. Healthy eating B. Physical activity C. Educating oneself about health and wellness D. Community involvement c
*May 22, 2012*

**physics**

A tennis ball is thrown horizontally at a speed of 10 m/s from the top of a building 78.4 meters high. How long does it take the ball to hit the street?
*May 22, 2012*

**Math**

f(x) = 4 ; x = -3, -2, -1, 0, 1, 2, 3 how do i solve this?
*May 20, 2012*

**Math**

what is the slope and y intercept of this equation? x+2=0
*May 20, 2012*

**Algebra**

give the domain of the function: f(t)= 3t²+5t+2
*May 17, 2012*

**honors chemistry**

SWS fan?
*May 17, 2012*

**honors chemistry**

The term "halogen" means "salt-former" and compounds containing halogens are called "salts". All halogens have 7 electrons in their outer shells, giving them an oxidation number of -1. The halogens exist, at room temperature, in all three states ...
*May 17, 2012*

**honors chemistry**

Their oxidation number of 0 prevents the noble gases from forming compounds readily. All noble gases have the maximum number of electrons possible in their outer shell (2 for Helium, 8 for all others), making them stable.
*May 17, 2012*

**math**

Give the slope and y-intercept of the given line. 1.2x-3y=6 2. y=-2x 3. y=3 4. x+2=0 Find the slope of the line that is a) parallel and b) perpendicular to the given line. 1. x=-8 2. y=10
*May 10, 2012*

**Homework Help**

A ruling of the FTC requires that every used car must display a(n) ________ spelling out the warranty terms under which the vehicle is offered for sale. A. vehicle identification chart B. agreement C. option chart D. buyer's guide
*May 9, 2012*

**math**

after noon would be 4 hours not 7.
*May 7, 2012*

**chemistry**

They are actually found in aqueous solutions, though they are not always written down because they form naturally. In reactions in acidic and basic equations, they are written down. The presence of hydrogen ions are actually measured by pH. They are found with hydronium ion = ...
*May 7, 2012*

**chemistry**

HCN(aq) + SO4-2(aq) HSO4-(aq) + CN -(aq) a. What is the Bronsted - Lowry acid in this equation? b. What is the Bronsted - Lowry base in this equation? c. What is the conjugate acid in this equation? d. What is the conjugate base in this equation?
*May 7, 2012*

**Honors Chemistry**

I need someone to check these questions. I know its a lot of questions. 2NH3 + Ag+ Ag(NH3)2+ a. What is the Lewis acid in this equation? [Ag+] b. What is the Lewis base in this equation? [NH3] Given H2SO4 is sulfuric acid, HNO3 is nitric acid, and H3PO4 is phosphoric acid, ...
*May 7, 2012*

**math**

A rectangular prism has 2 ends and 4 sides. Opposite sides have the same area. The surface area is the sum of the areas of all six sides. Find the area of two sides (Length*Height)*2 sides Find the area of adjacent sides (Width*Height)*2 sides Find the area of ends (Length*...
*May 7, 2012*

**Chemisrty**

How many grams of lithium metal would be produced if 0.500g of magnesium was added to a solution of lithium chloride?
*May 5, 2012*

**Chemisrty**

How many L of carbon dioxide gas will be produced from the decomposition of 5.0g of sodium hydrogen cardonate?
*May 5, 2012*

**Calculus**

Breathing is cyclic and a full respiratory cycle from the beginning of inhalation to the end of exhalation takes about 5 seconds. The maximum rate of air flow into the lungs is about 0.5 L/s. This explains, in part, why the function f(t)=(1/2)sin((2pi*t)/5) has often been used...
*April 27, 2012*

**calculus**

In a certain city the temperature (in degrees Fahrenheit) t hours after 9 a.m. was approximated by the function T(t) = 50 + 14sin((pi*t)/12). Find the average temperature (in degrees Fahrenheit) during the period from 9 a.m. to 9 p.m. I got (1/12)((12/pi)(50(12)-14cos((pi)))+(...
*April 27, 2012*

**sociology**

Explain the concept of socialization and highlight one agent of socialization that can be impactful on your life, stating how and why.
*April 26, 2012*

**Chemistry**

Using the solution: NaOH + HCl yields NaCl + H20 What mass of H20 would be produced by combining 10.0 mL of each reagent? Thanks for any help; it's greatly appreciated!
*April 25, 2012*

**Child Development**

When both parents believe that men are capable of nurturing infants a. mothers devote time to caregiving b. fathers devote less time to caregiving c. fathers devote more time to caregiving d. the marital relationship tends to suffer, particulary when me spend little time in ...
*April 23, 2012*

**Child Development**

thank you
*April 23, 2012*

**Child Development**

So then it is Roles maybe This lesson is kicking my butt
*April 23, 2012*

**Child Development**

Dean associates certain activies, roles, and traits as being typical for either males or females. His associations conform to cultural stereotypes and encompass many gender-linked responses. This is an example of gender A.Atypicality B.roles C.typing D.identity I think it is A...
*April 23, 2012*

**math**

m= y2 - y1/ x2-x1 m being slope
*April 23, 2012*

**Chemistry**

Solubility Rules: 1. Salts of group 1 and ammonia are soluble. 2. Acetates and nitrates are soluble. 3. Binary compounds of group 17, except F, are soluble with metals, except Ag, Hg+, and Pb. 4. All sulfates are soluble, except those of Ba, Sr, Pb, Ca, Ag, and Hg+ . 5. Except...
*April 23, 2012*

**Algebra2**

If f (x) = x² + 3 and g (x) = 3x - 1 then find the following: 1. (f/g)(x) 2. (f o g)(x) 3. (f o g)(1) 4. (g o f)(x)
*April 23, 2012*

**Algebra2**

If f (x) = x² + 3 and g (x) = 3x - 1 then find the following: 1a. (f+g)(x) 1b. (f+g)(3) 1c. (f-g)(x) 1d. (fg)(x) 1e. (fg)(-1)
*April 23, 2012*

**Life orientation**

Critically discuss 8 1ays in which the environment problem impact on the within your community or any other community whitin south Africa
*April 17, 2012*

**Algebra 2**

how do you find the slope and y intercept of: x= -3
*April 12, 2012*

**Spanish**

i need help translating these sentences. only using the verb "estar" 1. My grandfather took my brother to the university. 2. My best friend is my work colleague. 3. It's my boyfriends necktie. 4. My female cat is in the garden. 5. My male cousin and I had a ...
*April 9, 2012*

**Chemistry**

What are the rules to determine the solubility of salts?
*April 6, 2012*

**Chemistry**

1. How many molecules does 36.0 grams of water represent? Change the following masses to number of particles by: A) dividing by the molar mass to get the number of moles, and then B) multiplying number of moles by Avogadros number
*April 5, 2012*

**Chemistry**

Identify which element is being oxidized and which is being reduced Mg (s) + 2H2O (g) = Mg(OH)2 (s) + H2 (g)
*April 4, 2012*

**Geometry**

A spherical water tank has a diameter of 10 feet. How much water does it hold when half full ? ( use 3.14 )
*March 28, 2012*

**Chemistry**

Predict the characteristic of the solutions of the following salts. 1.CrBr3 2.NH4ClO4 3.NaCl 4.NiSO4 5.GaI3 6.MgC4H4O5 7.K2CO3
*March 27, 2012*

**Intermediate Algebra**

12y^4
*March 27, 2012*

**Intermediate Algebra**

1.8 * 10^6
*March 27, 2012*

**language arts**

Hi. Do you know of any poems about holidays that include word play or puns? Thanks!
*March 26, 2012*

**Algebra 2**

If f(x)= x^2 + 3 and g(x) = 3x - 1 then find the following: 1a. (f+g)(x) 1b. (f+g)(3) 1c. (f-g)(x) 1d. (fg)(x) 1e. (fg)(-1) 1f. (f/g)(x) 1g. (f o g)(x) 1h. (f o g)(1) 1i. (g o f)(x)
*March 26, 2012*

**physics**

A 3.00x10^-3 kg lead bullet enters a target with a speed of 2.00x10^2 m/s and comes to rest within the target. Calculate the rise in temperature of the bullet assuming that 80.0% of the heat produced is absorbed by the bullet. The Specific heat of lead is 1.30x10^2 J/kg K
*March 25, 2012*

**physics**

directly across from one of the speakers
*March 18, 2012*

**physics**

A student sets up two speakers spaced 2.5 meters apart, each playing the same tone of a single frequency. She stands at point P, at an equal distance from each speaker and hears the tone playing loudly. She walks towards point Q, directly opposite one speaker, and when she ...
*March 18, 2012*

**Mathematics**

A garrison of 1200 men has sufficient ratios for 25 days at the rate of 2400g per man per day. If 300 man join them and the ratios are reduced to 2000g per man per day,how long will the road last all of them? Thank you :)
*March 13, 2012*

**computers**

Which of the following html tags would you use after a table? A. </p> B. </table> C. </html> D. </end> i say b.
*February 29, 2012*

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