Tuesday
May 3, 2016

Posts by haley

Total # Posts: 478

Math
Barbara is playing a game. She jumps forward 5 feet, and then steps backward 2 feet. How many jumps will it take her to reach the finish line, which is 20 feet from where she started? Make a table to show Barbara's position. Barbara will reach 20 feet on jump number _____...
March 1, 2011

Physics
An m = 6.80-kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22.0 m/s and shatters into three pieces, which all fly backward, as shown in the figure. The wall exerts a force on the ball of 2670 N for 0.110 s. One piece of mass m1 = 2.80 kg ...
February 27, 2011

Physics
How many rpm's will a 2'' Nd45 sphere do spinning at 340.29 m/s. Please help me!! =(
February 13, 2011

Physics
How many rpm's will a 2'' Nd45 sphere do spinning at 340.29 m/s. Please help me!! =(
February 13, 2011

english/ grammer
would you say: her aspiration of freedom or her aspiration for freedom ?
February 10, 2011

Math
Why does the division of zero equal one? I just do not understand the process. I've researched it and I have read the responses, but I do not understand them. Can Someone explain it further?
February 3, 2011

Physics
You serve a tennis ball from a height of 2.29 m above the ground. The ball leaves your racket with a speed of 18.7 m/s at an angle of 6.55° above the horizontal. The horizontal distance from the court's baseline to the net is 11.89 m, and the net is 1.07 m high. ...
January 30, 2011

math-precalc
In the shot put, the shot must land within a 40 degree sector. Consider a coordinate system where the vertex of the sector is at the origen, one side lies along the positive x-axis, and the units are meters. If a throw lands at the point with coordinates (16, 12), how far is ...
January 29, 2011

physics
m= .025 kg initial velocity= 27 m/s time= 5.0*10^-4 final velocity= 10 m/s Force*time=mass( final vecolicy - negative initial velocity) F(5.0*10^-4)=(.025)(10-(-27)) F=(.025)(10-(-27))/(5.0*10^-4)
January 25, 2011

The largest Ferris Wheel in the world is the London Eye in England. The height (in metres) of a rider on the London Eye after t minutes can be described by the function h(t) = 67 sin[0.2094(t-30)] + 70 Using this equation i'm supposed to find the diameter, the maximum (top...
January 23, 2011

math formula?
Thank you so much!
January 20, 2011

math formula?
Based on an average cost per year to attend a university or college of your choice, how much should be invested each month to obtain the goal of that amount (the goal is 40,000\$)? Assume 6%/a compounded monthly for 5 years. I don't need the answer, just the formula please!
January 20, 2011

physics
A force of 100 Newtons acts upwards on a mass of 50 kg, another force of 60 newtons acts on the same mass downwards. calculate the accleration in which direction will be the accleration
January 16, 2011

math
How do you find (in radians) the exact value of: tan[pi-(pi/12)]
January 13, 2011

math
solve the first equation for y. 5x-y=-1 subtract 5x from both sides -y=-1-5x divide by -1 y=1+5x now, plug this answer in for y in the second equation. 15x=2y 15x=2(1+5x) 15x=2+10x 5x=2 x=.4 plug this(x=.4) into the equation for y. y=1+5x y=1+5(.4) y=1+2 y=2 therefore, x=.4 ...
January 12, 2011

Math
You can simplify the fraction 14/8 by dividing both the top and the bottom by a common factor. if you divide them both by 2, you get 7/4.
January 12, 2011

Math
thanks. How would you know how to do similar problems? Where should i start when verifying trig equations?
January 12, 2011

Math
verify that the equation is an identity: (1-cosX)/(1+cosX) = (cscX-cotX)^2
January 12, 2011

How to convert 4.65 into a fraction but in simpilest form while showing your work?
January 11, 2011

physics
A tightly stretched "high wire" is 44 m long. It sags 3.8 m when a 56 kg tightrope walker stands at its center. What is the tension in the wire? 1 NIs it possible to increase the tension in the wire so that there is no sag? so far i know you do the inverse sin of (3....
January 9, 2011

Chemistry
The empirical formula of a compound is CH2O and the molecular mass is 180. What is the molecular formula of the compound?
December 14, 2010

Chemistry
What is the total mass of iron in 1.0 mole of FeCO3?
December 14, 2010

Chemistry
A gas has a volume of 1,400 milliliters at a temperature of 20.0 K and a pressure of 101.3 kPa. What will be the volume when the temperature is changed to 40.0 K and the pressure is changed to 50.65 kPa?
December 14, 2010

physics
A hypothetical planet has a radius 2.1 times that of Earth, but has the same mass. What is the acceleration due to gravity near its surface? What equation should i use?
December 13, 2010

algebra
4(3-u)+u=22+2u what does u equal?
December 7, 2010

Math
1. 6,340
December 2, 2010

Math
December 2, 2010

Math
input (f) 5,10,2,8 Output f(x) 22,47,7,37 My question is what is the rule?
December 2, 2010

algebra
because if you only buy five you wont have enough pencils for the whole class that's why you need 6
December 2, 2010

math
There not rectangles!
December 2, 2010

math
Rational
December 2, 2010

help! physics
Two masses (m1 = 532 grams, m2 = 114 grams) are connected with a rope through a frictionless pulley The ramp has an elevation angle θ = 65.3° and a coefficient of friction μ = 0.184. What are Fll and Fperpendicular for m1? What is the normal force on m1?
November 30, 2010

physics
an atwood machine is set up with m1=234 grams and m2=485 grams. the height of m2 above the floor is 137 cm, and the system is released from rest. the pulley is frictionless. what is the acceleration of this system? what is the tension in the string? how long will it take for ...
November 30, 2010

chemistry
Thank you so much!!! We do not know the pressure or temperature of the classroom though. This assignment was given to us for homework. We are to figure out the numbers and send them to our teacher then use them to do the lab in class tomorrow. Should we use a temp and pressure...
November 30, 2010

chemistry
Alright class. Your task is to produce 175mL of carbon dioxide. You many use anything in class. You have 1 class period to produce your product. You can use as much sodium carbonate and 1.0M hydrochloric acid as needed. ( Remember is stoichiometry lab)
November 30, 2010

chemistry
Your task is to produce 175mL of carbon dioxide. You many use anything in class.
November 30, 2010

math
solve 2sin^2 theta-7 sin theta= -3 for theta, where 0<theta<360 degrees
November 26, 2010

math
write the general solution to 2cos^2x+cos x=1
November 26, 2010

physics
two crates, of mass 75 kg and 113 kg, are in contact and at rest on a horizontal surface. A 727 N force is exerted on the 75 kg crate. If the coefficient of kinetic friction is 0.15, calculate the following: a)the acceleration of the system b) the force that each crate exerts ...
November 22, 2010

physics
what is theta, the x component, and the y component if you know the following standard vector notation: 239 m @ 261 degrees magnitude: 239 m navigational angle: 261 quadrant:3
November 14, 2010

in chronicles of narnia whats the word ROW's sentence
November 12, 2010

the speed of the current in Puget Sound is 5 mph. A barge travels with the current 26 miles and returns in 10 and 2/3 hours. what is its speed in still water?
November 3, 2010

math
the speed of the current in Puget Sound is 5 mph. A barge travels with the current 26 miles and returns in 10 and 2/3 hours. what is its speed in still water?
November 3, 2010

algebra
Add parentheses to 9+8•7-6•5+4•3+2 so that the value of the expression is 105
November 3, 2010

physics.
an object travels 219 meters with acceleration 6.43 m/s^2 over an interval of 2.86 seconds. What are Vi and Vf.
October 31, 2010

physics
A skier is accelerating down a 30.0° hill at a = 4.10 m/s2 a) What is the vertical component of her acceleration? b) How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 340 m?
October 31, 2010

physics.
The x component of a certain vector is -86.0 units and the y component is +75.0 units. What is the magnitude of the vector?
October 24, 2010

physics.
A jogger runs 59 m due west, then changes direction and runs 83 m due north. What is the distance the jogger travels?
October 24, 2010

Human Geography
How do I calculate the physiological density of Namibia? I can't find it!! HELP!! :)
October 24, 2010

What are some symbols in 'a journey to the center of the earth' by jules verne
October 24, 2010

physics
Rockets A and B are fired straight upward from rest. Rocket A is launched first and accelerates at 11.2 m/s2. Rocket B is launched 2.10 s after Rocket A and B accelerates at 14.6 m/s2. Solve for the moment in time when the rockets are separated by 484 m. a) how long after ...
October 17, 2010

joslins answer is incorrect jen's is right. 7x^2-9x
October 16, 2010

Calculus III
A particle is moving in R2 according to the law x=t^2, y=t^3 (time is measured in seconds, coordinates in meters). (a) What is the average velocity of the particle over the time interval [1,1.1]? (b) What is the instantaneous velocity of the particle at time t=1?
October 12, 2010

PHYSICS
A flatbed truck of mass 2000kg traveling 20 m/s (about 45mph)carries a load of mass 500kg positioned 3 meters behind the cab. The load is kept on the truck by friction, and the coefficient of friction between the load and the bed of the truck is 0.5. What is the shortest ...
October 12, 2010

Science
What is the hydrologic cycle?
October 7, 2010

Science
Jake was doing a lab to find the density of metal. Here's his data: mass of the metal sample: 45 grams, volume of metal sample: 4.5 mL. Use his data to determine the density of the metal sample. Can you help? I don't get this.
October 7, 2010

Algebra 1 Honors
What Is 45% of 30?
September 23, 2010

describle plasma membrane
September 16, 2010

math (trig)
from the top of a bridge over the burlington canal, maria looks down at a sailboat at an angle of depression 15 degrees.the bridge is 18m above the water. calculate the horizontal distance from the bridge to the sailboat
September 14, 2010

math
Beth drives 55 miles on one hour.she says she will drive a distance of about 830 miles when she drives for 26 hours is Beth's estimate right or wrong?
September 7, 2010

math
A toy manufacturer is introducin g two new dolls, my first baby and my real baby. IN one hour, the company can produce 8 first baby dolls and 20 real baby dolls. Because of demand, the company produces at least twice as many first babies as real babies. The company spends no ...
August 29, 2010

Physics
Using Planck’s constant as h = 6.63 E-34 J*s, what is the wavelength of a proton with a speed of 5.00 E6 m/s? The mass of a proton is 1.66 E-27 kg. Remember to identify your data, show your work, and report the answer using the correct number of significant digits and ...
June 30, 2010

Chemistry
An excess of zinc metal is added to 50.0 mL of a 0.100 M AgNO3 solution in a constant-pressure calorimeter. Assuming that the density of the solution is the same as for water, calculate the mass of the solution.
June 30, 2010

Algebra 2 Honors
no, i need an exact answer
June 6, 2010

Algebra 2 Honors
what is the exact value of tan375degrees
June 6, 2010

science
WHich of the following systems will the endocrine system use to send any of it messaqges? THe circulatory The immune The reproductive The excretory
April 18, 2010

science
Feedback inhibition means that an increase in a substance will what?
April 18, 2010

college math
(x)(x-1)(x+1)
April 15, 2010

college math
(3x)(y + 3y + 2)
April 15, 2010

History
I'm writing a comparison paper on two popes. One of them is Innocent III, but I'm not sure what a good comparison for him would be? The catch is that it has to be within the time period: 1100-1272 Any ideas? Thanks!
April 13, 2010

refer to the frequency table to anwser the questions
April 8, 2010

calculus
A box with a square base and an open top is to have a volume of 68in^3 . Neglect the thickness of the material used to make the box, and find the dimensions of the box that would minimize the amount of material used. The width and length of the box are each ___ in. The height ...
March 30, 2010

which ezpresses 3,571,000 in scientific notation?
March 8, 2010

Chemistry
You are given a jar containing a mixture of three different solid substances. The particles of each substance are larger than 0.5 cm in diameter. All you know about the substances is that each is a pure metal. Describe a method for determining the identities of the metals that...
February 23, 2010

math
suppose a pizza slice is a circle sector with a 24 angle and a radius of 15 inches. If a can of pizza sauce will cover 94 square inches of pizza, how many cans of sauce are needed to cover this slice?
February 18, 2010

math
9497463345x932234524?
February 11, 2010

gr12 chem
Both propane and propene react with bromine. State two ways in which these two hydrocarbons can be distinguished in their reaction with bromine
February 5, 2010

history
what was the situation of african americans in e united states from 1800 to 1860.
February 1, 2010

chemistry
we boiled water in a beaker and put a flask with a small amount of an unknown liquid into the flask then covered it with a lid with a pinhole in it, and we placed this flask in the boiling water bath until the liquid evaporated, then we let it cool and condense.
January 27, 2010

chemistry
during an experiment, if not all of a liquid vaporizes, in a flask with a cap with a pinhole. will the reported molecular weight be too high or low? i was thinking too high because the liquid weighs more.
January 27, 2010

geometry proofs
given: line QO congruent to QN, line NM CONGRUENT TO OP Prove: triangle QMP IS ISOCELES 5. TRIANGLE QNM CONGRUENT TO TRIANGLE QOP WHAT IS THE REASON 7. TRIANGLE QMP IS ISOCELES WHAT IS THE REASON
December 8, 2009

chemistry
We Know that : According to debroglies wavelength : λ = h / mv = 6.627 x 10 -34 J -s / 6.6 x10-24 x 10-3 kg / 1 g x 3.4x 107 mile / hr x 5 793 638.4 m / s / 1 mile / hr = 5.09 x 10-22 m
December 2, 2009

Physics
A 59 g particle is moving to the left at 29 m/s. How much net work must be done on the particle to cause it to move to the right at 38 m/s? .....i have tried two different ways and gotten the wrong answer. Kinetic Energy = 0.5 * Mass * (Change in Velocity)^2. Change in ...
November 29, 2009

government
this item can give a president real leverage in influencing congress?
November 17, 2009

French
Thanks, Ms. Sue. I looked up the spelling, and I've seen it spelled it both ways
November 14, 2009

French
surveilant
November 14, 2009

For Haley
I gave my answer on the question about probability. What's wrong with it? The one about the distributive property, also. I thought that was what he/she meant by "expanding." My bad.
November 14, 2009

For Haley
I'm not sure what you mean by my "last three responses." Please give me some examples of when I had answered incorrectly besides the one about expanding.
November 14, 2009

Probability
The probability that it's a queen would be 1/13, because there are 4 out of 52 cards in the deck that is a queen. 4/52 simplifies to 1/13. The probability that it's a spade would be 1/4, because there are 13 spades out of the 52 cards in the deck. 13/52 reduces to 1/4...
November 14, 2009

probability
Okay, hete is how to solve this problem: Since the probability that Alysha will miss is 0.15, that means that it is 15%, right? So, the probability that Alysha will NOT miss is 100 - 15, which is 85%. So the answer is 0.85 Now for Carla. 0.07 = 7%. 100 - 7 = 93%. So the answer...
November 14, 2009

math g12
If the ^ is a multiplication symbol, and you mean "expand" by using the distributive property, then this is the answer. n(a+b+c) is the same as: n(a) + n(b) + n(c) Which is na+nb+nc Hopefully, you know what this distributive property is, That would be VERY VERY ...
November 14, 2009

Math
The expected probability of rolling a die and landing on any number (1,2,3,4,5,6) would always be 1/6, because there are 6 possible outcomes, but only 1 will happen. I'm not sure i understand the question...
November 14, 2009

social studies)
Florida served as a safe haven for loyalists escaping the fighting of the northern colonies during the Revolutionary War. The British evacuation of loyalists from St. Augustine is well documented.
November 14, 2009

pre algebra
These are my steps: 52 = p + (-41) 52 = p - 41 (same thing) 52(+41) = p - 41 (+ 41) 93 = p
November 13, 2009

math
35, 27, 21, 15
November 13, 2009

science
The first would be distance. The second would be velocity.
November 12, 2009