Friday
January 30, 2015

Posts by BOB


Total # Posts: 2,529

physicss
A 0.145 kg baseball pitched at 44.0 m/s is hit on a horizontal line drive straight back toward the pitcher at 52.0 m/s. If the contact time between bat and ball is 3.00 ✕ 10-3 s, calculate the average force between the ball and bat during contact.
January 29, 2015

Physics
A spring with an unstrained length of 0.075 m and a spring constant of 2.7 N/m hangs vertically downward from the ceiling. A uniform electric field directed vertically upward fills the region containing the spring. A sphere with a mass of 4.84 10-3 kg and a net charge of +7.0...
January 28, 2015

physics
SOMEONE HELP ME PLEASE
January 27, 2015

physics
A boy on a 2.2 kg skateboard initially at rest tosses a(n) 8.4 kg jug of water in the forward direction. If the jug has a speed of 3.0 m/s relative to the ground and the boy and skateboard move in the opposite direction at 0.60 m/s, find the boy’s mass. Answer in units of kg
January 27, 2015

English
I have to pick a topic for an argumentative research paper, but when I think about different topics I realize that all of my ideas and support on the subjects are from other people's ideas that I have read or heard. So how do I come up with original ideas for a topic ...
January 27, 2015

Math
Samuel and Jason 3/4 of the combined earnings from Wednesday to buy a gift. how much do they spend? Is there enough left over from Wednesday's earnings to buy a card that costs $3.25?
January 22, 2015

math
repost find unknown number in the equation 9/10 - x = 1/5
January 21, 2015

math
find unknown number in the following equation 9/10 - x +1/5 what is x
January 21, 2015

math
the wheel of a bicycle has a diameterof 72 cm and are rotating with an angular velocity of 12 rad/s. determine how much time the bicycle takes to travel 100m.
January 21, 2015

Math
First week sells 6 chairs for $80 each. Next week, if chair is not sold, it will sell for 0.85 times previous week's price. Store needs to sell 6 chairs for total of $270 to make a profit. what is the last week in which all 6 chairs could be sold so that the store makes a ...
January 20, 2015

English help
I think it's hard news article.
January 7, 2015

LANGUAGE ARTS !! 8TH GRADE
YOU ARE WRONG OMFG WHY WHY WHY WHY WHY WHYW HYW LIESSSSSSSSSSSSSSSSSSSSSSS
January 6, 2015

physics
By the way, the equation is: Fg = GM/r^2 Where G = Gravitational Constant (6.67 * 10^-11) M = Earth's mass r = Earth's radius The givens are: Earth's mass = 5.98 * 10^24 kg Earth's radius = 6.38 * 10^6 m
January 5, 2015

physics
What is the distance from the earth's center to a point where your weight would be 1/25 of what you weigh at the surface?
January 5, 2015

Quick Question
When you have to pay for something weekly, does that mean every end of the week?
January 3, 2015

economics
Mutual funds are attractive to small investors because (a) the funds offer a guaranteed return on investment (b) the funds are insured by an agency of the US government (c) the funds offer the opportunity to share in an investment in a variety of stocks and bonds (d) investors...
December 21, 2014

math
t(n)
December 17, 2014

math
the third term of a geometric sequence is 25 and the eighth term is 25/32. find a, r, and t
December 17, 2014

math
that's dumb is there a different way to do it? with a formula?
December 17, 2014

math
an employee is paid $3600 for the first month. she is paid an additional 1% at the end of the second month, which means a total of $3636. she continues to receive a 1% raise each month for a full year. what is her total salary at the end of the year?
December 17, 2014

Stat
Assume that a procedure yields a binomial distribution with a trial repeated n times. Use a binomial probabilities table to find the probability of x successes given the probability p of the success on a given trial N=9 X=0 p=0.30
December 17, 2014

math help
thank you !
December 16, 2014

chemistry. please help drboz222
Calculate the oxygen ppm concentration of a 3.50 kg sample of lake water that comtains 2.34 mg of dissolved oxygen
December 16, 2014

Economics
What are two reasons why the values of corporations fluctuate? Explain. My answer: Competition and events in the world
December 15, 2014

language arts
GG, your lack of grammar and intelligence is very amusing.
December 15, 2014

Math
A fence 12ft high runs parallel to a tall building at a distance of 2ft from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
December 13, 2014

Algebra
James, Karen, and Lou are hiking. Lou forgot to bring any water. James brought 2 gallons of water and Karen brought 1 and 3/4 gallons of water. The three of them agree to divide all the water equally among them. Lou gives $2 for the water he receives, which James and Karen ...
December 11, 2014

Algebra
Our basketball team has finished 80% of its season, during which we won 40% of the games we played. What percent of the remainder of our games must we win in order to finish the season with the same number of wins as losses?
December 7, 2014

ratio and rates
Gina's art teacher mixes 9 pints of yellow paint with 6 pints of blue paint to create green paint. Gina mixes 4 pints of yellow paint with 3 pints of blue paint.
December 7, 2014

math
no
December 7, 2014

physics
Three blocks A, B, and C are connected by two massless strings passing over smooth pulleys as shown below, with the 3.4-kg block on a smooth horizontal surface. Calculate the tension in the strings connecting A and B, and, B and C.
December 5, 2014

Chemistry
Kc is 1.67 × 1020 at 25°C for the formation of iron(III) oxalate complex ion: Fe3+(aq) + 3 C2O42-(aq) [Fe(C2O4)3]3-(aq). If 0.0200 M Fe3+ is initially mixed with 1.00 M oxalate ion, what is the concentration of Fe3+ ion at equilibrium?
December 2, 2014

Chemistry
The equilibrium constant, Kp, equals 3.40 for the isomerization reaction: cis-2-butene trans-2-butene. If a flask initially contains 0.250 atm of cis-2-butene and 0.145 atm of trans-2-butene, what is the equilibrium pressure of each gas?
December 2, 2014

Algebra
(7.8*10 to the 12th power)*800=(7.8*10 to the 10th power)*80,000 Directions:tell whether each equation is true or false. if false, write the inequality in like terms I don't remember how to start multiplying.
November 30, 2014

Math
ASHLEY BORROWED 3 BOOKS FROM THE LIBRARY. THIS WAS 25% SHE CHECKED OUT. HOW MANY BOOKS DID SHE CHECK OUT
November 26, 2014

Physics
A 85-Kg firefighter climbs up a ladder at a constant speed of 2.5 m/s. What average power does the firefighter expend to overcome gravity?
November 25, 2014

math
what are the steps in determining how to maximize the area of a rectangle given a specific perimeter?
November 23, 2014

math
what is 1/3 divide 5/8
November 22, 2014

physics
A solid disk rotates in the horizontal plane at an angular velocity of 0.040 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.13 kg·m2. From above, sand is dropped straight down onto this rotating disk, so ...
November 16, 2014

Chemistry Buffers
Write reactions showing how each of the following buffers would neutralize added HCl. HF and NaF Express your answer as a balanced chemical equation. Identify all of the phases in your answer. HC2H3O2 and KC2H3O2 Express your answer as a balanced chemical equation. Identify ...
November 16, 2014

physics
A ball with radius 12cm rolls on a level surface, and the translational speed of the center of mass is 0.35 m/s. What is the angular speed about the center of mass if the ball rolls without slipping?
November 16, 2014

math fractions
•math - Ms. Sue, Sunday, November 16, 2014 at 12:39pm 12 •math - bob, Sunday, November 16, 2014 at 12:56pm Ms. Sue can you tell me how you got that answer please. •math - Ms. Sue, Sunday, November 16, 2014 at 1:09pm Multiples of 6: 6, 12, 18, 24 Multiples of 4: ...
November 16, 2014

math
thanks mrs. sue. I understand now how I should get the lcm but how do I figure out how many pounds of meat will be in the meat loaf? when I multiply do I work the problem like this.... 3/4 *5/6 =9/12*10/12 =90/12 =7 6/12 =7 1/2 is this correct?
November 16, 2014

math
Ms. Sue can you tell me how you got that answer please.
November 16, 2014

math
Tom is making meatloaf with 3/4 pound of turkey and 5/6 pound of ground beef. What is the LCM he should use to find the total number of pounds of meat? How many pounds of meat will be in the meat loaf? Show your work Completely.
November 16, 2014

physics
A piece of putty of mass m = 0.75 kg and velocity v = 2.5 m/s moves on a horizontal frictionless surface. It collides with and sticks to a rod of mass M = 2 kg and length L = 0.9 m which pivots about a fixed vertical axis at the opposite end of the rod as shown. What fration ...
November 14, 2014

algebra
Andy hit three less field goals than three times the number of field goals Gary hit. Together, they scored 17 field goals. Write and Solve an equation to find how many field goals Gary and Andy scored.
November 11, 2014

Chemistry
What is the approximate ΔH in kJ for the following reaction as written: 2NH3(g) --> 3H2(g) + N2(g) Careful, what kind of bond does the nitrogen molecule make?
November 10, 2014

Chemistry
Arrange the following diatomic molecules in order of weakest to strongest bond: HF, HCl, HBr, and HI.
November 10, 2014

Chemistry
Which of the following ionic compounds has the highest melting point? Help: Lattice energy Select one: a. Cs2O b. K2O c. BeO d. SrO e. LiF f. CsI
November 10, 2014

physics
Sum of forces is F=mg-2.3N F=9.8*2.7N-2.3N F= 26.46-2.3 F=24.16 But F=ma 24.16N=2.7kg*a a= 8.96m/s^2
November 8, 2014

chemistry
How many atoms of oxygen are there in 5.00g of copper(II) sulfate pentahydrate?
November 4, 2014

Engineering
Have a new tutor who has failed to teach us most of his assignment, I've finally got stuck on derivation of the formula G=E/2(1+v). any help would be much appreciated!
November 3, 2014

Chemistry
If ununseptium (element 117) reacts with oxygen what would be equation of the product? Thanks so much!
November 2, 2014

Math
5/6=1/3-x
November 1, 2014

engineering
I've answered it myself i think. The liquid is being compressed therefore the change in volume should be negative. if someone could verify that'd be great
November 1, 2014

engineering
should my calculated bulk modulus of a liquid be (-)? the lookup tables i'm comparing the results too have positive values, or is it written without the (-) as a negative bulk modulus is impossible?
November 1, 2014

English
substitute the given words in and see if it makes sense the answer is when
November 1, 2014

Math
21
October 29, 2014

math
Try setting up a proportion.
October 27, 2014

math
Why would you add 2+5?
October 27, 2014

math
Where did you get the 7 from? Check again. I'll be glad to check your work.
October 27, 2014

algebra
The slope of a horizontal line is 1. The equation of the horizontal line passing through (4, 5)is _______?
October 24, 2014

algebra
Find an equation of the line that satisfies the given conditions. Through (5, 3) and (4, 7)
October 24, 2014

calc
A water trough is 7 m long and has a cross-section in the shape of an isosceles trapezoid that is 40 cm wide at the bottom, 100 cm wide at the top, and has height 60 cm. If the trough is being filled with water at the rate of 0.3 m3/min how fast is the water level rising when ...
October 23, 2014

stats
The probability that a football game will go into overtime is 18%. In 140 randomly selected football games, what is the mean and the standard deviation of the number that went into overtime?
October 21, 2014

Science
xciojiovjeio
October 21, 2014

Math
Suppose that water is pouring into a swimming pool in the shape of a right circular cylinder at a constant rate of 3 cubic feet per minute. If the pool has radius 6 feet and height 10 feet, what is the rate of change of the height of the water in the pool when the depth of the...
October 21, 2014

Physics
A car drives straight down toward the bottom of a valley and up the other side on a road whose bottom has a radius of curvature of 100m . At the very bottom, the normal force on the driver is twice his weight. At what speed was the car traveling?
October 20, 2014

Math
A sphere has a volume of 200m3 . What is the volume of the smallest cube that this sphere would fit inside of? (Hint: try drawing a diagram of a side or top view of this situation)
October 14, 2014

pre cal
i;fo:OI jfiiejf ;soiej ;si edjis s;i ijd;si s;id dji s;ijaiwej faiw f ;wijf ;aeij fiaejd ;aie ; eiwfj ;awie eij;ije aweinrr r fkr rr;IEJR JREI rjir; rj W JIRJ R;RJ RF ZIRJ F; ZERJIFSE; TS GDR H SR TH RYHSRTHB DFV dfvszdf dv svsf vefv zf Figure out my code...-_- ...
October 13, 2014

pre cal
How fast is the tire traveling in mph if it does 2 rotations in 2 seconds with a diameter of 27 inches for the tire?
October 13, 2014

statistics
.4332
October 12, 2014

statistics
A congressional committie has of 8 senators and 7 representatives. How many ways can a subcomittie of 6 be formed from the full committee if exactly 5 of the members must be senators?
October 10, 2014

Math
A cylinder has a surface area of 250cm2 . The height is twice as big as the radius. What is the height of the cylinder?
October 3, 2014

algebra
5 (x + 10) + x ?? 6x + 15 5x + 15 6x + 50 4x - 50
October 1, 2014

chemistry
A solution contains an unknown amount of dissolved magnesium. Addition of 5.34×10−2mol of Na2CO3 causes complete precipitation of all of the magnesium. What mass of magnesium was dissolved in the solution.
September 30, 2014

biology
there just fill in a blank questions
September 30, 2014

biology
_______ is the tendency for the fluids to resist flow.______________ water is more vicious than warmer water, allowing floating organisms to use less energy to keep from sinking.
September 30, 2014

history
They all how a part in reform. I would have to change to Plessy v. Ferguson because of it was just between the races and not everyone
September 27, 2014

history
Muckrackers
September 27, 2014

history
There were many examples that inspired the reform-minded spirit after 1900. Which was not an example? Muckrakers Plessy v. Ferguson Triangle Shirtwaist Factory fire The Jungle
September 27, 2014

Trigonometry
The wheels of a scooter have a diameter of 4.5 inches. If the person riding the scooter is traveling down hill at 15.0 mph. what is the approximate angular speed of the wheels in radians per second
September 25, 2014

chemistry
A mothball, composed of naphthalene (C10H8), has a mass of 1.10g
September 24, 2014

chemistry
A helium balloon contains 0.30g of helium. Given the molecular weight of helium is 4.0 g/mol, how many moles of helium does it contain?
September 24, 2014

Physics
A projectile of mass 0.377 kg is shot from a cannon, at height 6.6 m, as shown in the figure, with an initial velocity vi having a horizontal component of 6.1 m/s. The projectile rises to a maximum height of y above the end of the cannon’s barrel and strikes the ...
September 23, 2014

Physics
An ice skater skates 13.3 m southwest, then 26.6 m east, and finally 39.9 m in a direction 51.5◦ north of east. Find the magnitude of the displacement required to bring the skater back to her starting point. Answer in units of m
September 22, 2014

math
pee pee poo
September 22, 2014

physics
A child rides a toboggan down a hill that descends at an angle of 20.7◦ to the horizontal. The hill is 18.2 m long. What is the horizontal component of the child’s displacement?
September 21, 2014

math
thank you so much i get it now !! :)
September 13, 2014

math
simplify and state any restrictions: 1. x+3/x^2+11x+24 - 2x+10/x^2+11x+30 answer: -x-10/(x+8)(x+6) 2. x-4/x^2-8x+16 + 3x+21/x^2+12x+35 answer: 4x-7/(x-4)(x+5) i dont uderstand how to do it. can you please show me the steps. thanks
September 13, 2014

math
-10+8=8+(-10) name the property illustrated
September 12, 2014

algebra
mr darwin who is found of gardening is pushing a wheelbarrow with a force of 5.0 newtons. there are 11.4 newtons worth of horse manure in the wheelbarrow. the length from the wheel to the end of the handles is 1.6m and the length of the wheel to the center of the bucket is 0....
September 10, 2014

Math
mr darwin who is found of gardening is pushing a wheelbarrow with a force of 5.0 newtons. there are 11.4 newtons worth of horse manure in the wheelbarrow. the length from the wheel to the end of the handles is 1.6m and the length of the wheel to the center of the bucket is 0....
September 9, 2014

government
Judges espousing a philosophy of original understanding maintain that school desegregation cases decided on the basis of the Fourteenth Amendment were wrongly decided because? 1 he original intent of the framers was to defer to the will of legislative bodies. 2 we do not know ...
September 5, 2014

government
laws that discriminate must be said to reflect the will of the majority.
September 5, 2014

government
Originalists often hold that it is incorrect to use the Equal Protection Clause of the Fourteenth Amendment to strike down laws that discriminate because
September 5, 2014

Math
A recipe that makes 4 servings calls for 3 / 4 cup of apple juice and 2 / 3 cup of cranberry juice. How many cups of juice are there per serving?
September 4, 2014

Math
Perfect, well done!
August 31, 2014

statstics
a report says 65% of vechiles sold were SUV's. A random sample of 100 vechiles sold in last month is taken. Use the central limit theorem, find the probability that most 70% of the vechiles in the sample were SUV's
August 25, 2014

Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Members