Monday
July 28, 2014

Posts by sam


Total # Posts: 3,940

Physics
A basketball player is running at 5.00 m/s directly toward the basket when he jumps into the air to dunk the ball. He maintains his horizontal velocity. (a) What vertical velocity does he need to rise 0.750 meters above the floor? (b) How far from the basket (measured in the h...

Physics
An archer shoots an arrow at a 78.0 m distant target, the bull's-eye of which is at same height as the release height of the arrow. (a) At what angle must the arrow be released to hit the bull's-eye if its initial speed is 34.0 m/s? (Although neglected here, the atmosp...

math
S0rry i meant to say idid this befofe i asked for help. It didnt seem right to me but now the way you did it , i get it

math
THANK YOU . Idid 2000 * 29 / 100 =580

math
In a recent poll of 2000 households, 29% had pets. How many households did not have pets?

math
Thanks i got the same answer in a different way

math
Fabric costs14.00 per yard. If you buy 5 yards or more ,you can get 20% off. how much would 5 yards cost on sale?

math
how do you do 33 1/3% of 200.oo? the 1/3 is throwing me off. Thank you

math
got it . Thank you

math
Pete saved 24.00 of the 60 .oo dollars he earned. What percentage of his earnings did he save ?

math
Thanks everyone for the help

math
John bought 3 of the same shirt and paid 63.00 after the 30% discount.What was the original price of one of the shirts ? Not sure at all how to do this. Thank you

math
how to use a common denominator to write an equivalent fraction for each fraction?

math
I need help on how to use a common denominator to write an equivalent fraction for each fraction?number 1 is 1/2,1/3 and number 2 is 7/8,3/10 please help

chem
what are the type of chemical reactions for the below (synthesis, double/single displacement or decomposition) 2Na+2H2O->2NaOH+H2 2FeS2+3O2->Fe2O2+2SO2 CaCO3->CO2+CaO 2H2S+2KOH->K2S+2HOH 2Ca+4HOH->2Ca(OH)2+H2

chemistry
what is the chemical reactions for these... 2Na+2H2O->2NaOH+H2 2FeS2+3O2->Fe2O2+2SO2 CaCO3->CO2+CaO

Chemistry
how do i name this chemical? S(ClO3)2

Chemistry
how do i name this chemical? Fe(NO3)2

chemistry
i don't know how to write it into a chemical formula

chemistry
i need help with writing nomenclature for the formula and the compounds examples: Sodium bisulphate hydroiodic acid ammonium dihydrogen phosphate Zn(HCrO4)2 Calcium metal ferrous bromide sodium carbide phosphate radical liquid mercury plumbic oxide auric carbonite sodium hydro...

Algebra
just curious what grade is this math

Chemistry check and help
what is ... Sodium bisulphate hydroiodic acid ammonium dihydrogen phosphate Zn(HCrO4)2 Calcium metal ferrous bromide sodium carbide phosphate radical Check... sodium bicarbonate NaHCO3

math studies
A rhombus has diagonals of lenth 12 cm and 7 cm respectively. Find the larger angle of the rhombus

Chemistry
I am learning the different types of chemical reactions synthesis, decomposition, single displacement, and double displacement I am also learning skeletal equations word equations and balancing the equations I know how to balance equations if I am given the formula in symbols ...

cHEMISTRY
i dont know how to write chemical formulas is it like nomenclature because i need to balance equations (which i know how if the equation is given to me the symbols type but not in words), i need to write skeletal equations but i dont know if they are correct. example: 2H2+O2-&...

Calculus
q = f(p) = 10300e^−0.34p a) Find the number of products sold when the price of the product is $5. (Round your answer to the nearest whole number.) Number of products sold: b) Find a formula for the rate of change in the number of products sold when the price is p dollars...

Physics
A horse pulls a cart with a force of 180.0 N at and angle of 33.0° with respect to the horizontal and moves along at a speed of 11.0 km/hr. How much work does the horse do in 8.6 min? What is the average power of the horse?

SCIENCE
do mass containe capcity

physics
A force of 1.24 N pushes against an object with a mass of 0.16 kg for 4.00 min. The object does not move. What is the work done on the object by the force?

math
thank you

math
sorry i still dont understand .What do i cross multiply?

math
A store finds out that 5 out of every 9 customers prefer new extra crunch peanut butter. If the store sells 90,000 jars or regular peanut butter, how many jars of new x crunch should it produce ,and how many of regular should it produce ? Have no idea how to do this. please help

physics
A block weighing 71.5 N rests on a plane inclined at 24.1° to the horizontal. The coefficient of the static and kinetic frictions are 0.26 and 0.13 respectively. What is the minimum magnitude of the force F, parallel to the plane, that will prevent the block from slipping?

chemistry
How much heat is released when 28.95g of water is frozen?

math
A colony of bacteria is growing in a petri dish which has a maximum capacity of 100mg. The mass of bacteria is increasing at a rate given by the logistic equation. Initially there is 2mg of bacteria and the rate of increase is 1mg per day.

Math
Mandy scores b points in a basketball game. Jay scores 3 points less than Mandy. Kareem scores 2 times as many points as Mandy. Find the number of points that Jay scores in terms of b.

Chemistry
how do i figure out the valences for elements in the transition elements section in the periodic table of elements (i need it for doing nomenclature) and how do i figure out the valences if i don't have the periodic table of elements examples: Zn Cu Ni Co Fe Mn Cr V Ti Sc

statistics
Suppose that each unit of a system is up with probability 2/3 and down with probability 1/3. Different units are independent. For each one of the systems shown below, calculate the probability that the whole system is up (that is, that there exists a path from the left end to ...

Math
Perimeter of rectangle = 2*l+b. Area = l*b. If l = 1m, b = 55cm. Find area and perimeter

Chemistry check and help
so for all the chemical formulas if there is no subscript (for the valency of the element) does it mean it is a one or do i have to find the valency on the periodic table of elements? ex. P02 the P for Phosphorus doesn't have a number does it mean it is a one then ex.SO3 e...

Chemistry
so for all the chemical formulas if there is no subscript (for the valency of the element) does it mean it is a one or do i have to find the valency on the periodic table of elements? ex. P02 the P for Phosphorus doesn't have a number does it mean it is a one then ex.SO3 e...

Chemistry
i need to write to chemical formula for sulphur(II)iodide but both are non metals what do i do and i get confused sometimes cause i don't know when the metal/non metal gets a one charge (for the valences) ex. NiO =Ni1O2 =Ni2O =Nickel(I)Oxide ex. NiF2 =Ni1F2 =Ni2F =Nickel(I...

math
Thank you for working with me on math problems

math
So would it be 100 x 8 / 16 =50 lbs ?

math
How many pounds of nails will be needed to fill 100 boxes with 8oz. of nails in each?

Chemistry
I am supposed to name this using IUPAC method for binary compounds (i think) arsenic(111) sulfide silicon tetraiodide antimony (111)bromide ammonia gas lead(11) and the things in the brackets are supposed to be the roman numerals

physics
After falling from rest at a height of 31.5 m, a 0.564 kg ball rebounds upward, reaching a height of 20.2 m. If the contact between ball and ground lasted 1.80 ms, what average force was exerted on the ball?

physics
The initial velocity of a 1.55 kg block sliding down a frictionless inclined plane is found to be 1.27 m/s. Then 1.07 s later, it has a velocity of 5.37 m/s. What is the angle of the plane with respect to the horizontal?

Random
Why is society unfair?

math-fractions
Thank you

math-fractions
I have to tell the answer in terms of fractions. My doubt is whether it is 9/12 + 6/12 = 15/12 or 15/24 ?

math-fractions
Each band member had 12 tickets to sell, Jamie sold 9 of his tickets Matt sold 6 of his tickets. Using fractions find the total number of tickets sold by Jamie & Matt

Social Studies
10. Which of the following was Daniel Webster speaking of when he declared, "Liberty and Union, now and forever, on and inseparable!"? A) regional differences*** B) international differences C) improved transportation D) improved industry Is my answer correct?

Science
yeah

Social Studies
THANK YOU SO MUCH! THIS HELPS!

Social Studies
What did the Monroe Doctrine hope to accomplish?

Social Studies
Oh.. umm thanks

Social Studies
Is my answer correct?

Social Studies
During the early 1800s, the United States tried to make peace with other countries in order to grow and develop. Give an example of one of these peace efforts and briefly explain what it hoped to accomplish. An example of one of the peace efforts was the Missouri Compromise. I...

Writing
Thanks! :)

Writing
Which sentence is punctuated correctly? (To see that it's italicized, I quoted it in *) A. The article called "A Persistent Rebel" in *American History* magazine told about Elizabeth Blackwell. B. The article called *A Persistent Rebel* in *American History* maga...

Science
Which Of the following differs when comparing the deep ocean to the intertidal zone?? A) Need for Energy B) Salinity C) The amount of sunlight* D) Reliance on phytoplankton

EARTH SCIENCE
When the water level of a stream or river exceeds its natural banks, it has reached its

URGENT PHYSICS
A hammer thrower accelerates the hammer (mass = 7.30 kg) from rest within four full turns (revolutions) and releases it at a speed of 21.0 m/s. Assuming a uniform rate of increase in angular velocity and a radius of 0.80 m, calculate the angle of this force with respect to the...

Politics
Considers the senate opinion

English
Thanks a bunch!! :D

English
Which of the sentences below is punctuated correctly? A. "You know," Steven said, "I've never been to the zoo." B. . "You know" Steven said, "I've never been to the zoo." C. "You know," Stephen said, "I've neve...

math
The blue line of best fit for boys intersects the vertical axis at 20 inches and the point (12.5, 25). Which equation best describes the boy's line of best fit?

physics
A)Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. After leaving the end of the ski ramp, he lands downhill at a point that is displaced 53.0 m horizontally from the edge of the ramp. His velocity just before landing is 26.0 m/s and points...

algebra
Determine the equation of g (x) that results from translating the function f(x)=x^2+5 upward 13 units.

Math
Two minor league basebal players got a total of 396 hits. Washington has 8 more hits than sanchez. Find the number of hits for each player. Please help!

Math
Mr Townes created a 2foot wide garden path around a circular garden. The radius of the garden is 7 feet. He wants to cover the path in stones. If mr. Townes needs 1 bag of stones for every 5 square feet of path, how many bags of stones will he need to cover his garden path?

Algebra
A rectangular dog pen has a perimeter of 10 yd and a width of 2yd. What is its area?

college physics
To tighten a bolt, you push with a force of 76N at the end of a wrench handle that is 0.26m from the axis of the bolt. What torque are you exerting?

math
A ladder is 2 m long. It leans against a wall so that it is 90 cm from the base of the wall. How far up the wall does the ladder reach? Put your answer in m. Round to 3 sig fig.

Chemistry
How did you get -.52?

Chemistry
Colligative Properties The freezing point of distilled water was determined by recording a thermogram: -0.176 degrees Celsius. The freezing point of a 0.200 m (molality) solution containing an unknown, ionic compound was determined by recording a second thermogram: -.904 degre...

chemistry
calculate the percentages by mass of the component element in sodium trioxonitrate(v)

Chemistry
The freezing point of a .200m solution: -.904 degrees Celsius.

Chemistry
Colligative Properties The freezing point of distilled water was determined by recording a thermogram: -0.176. The freezing point of a 0.200 m (molality) solution containing an unknown, ionic compound was determined by recording a second thermogram. a. Determine the freezing p...

Physics
A baggage carousel at an airport is rotating with an angular speed of 0.397 rad/s when the baggage begins to be loaded onto it. The moment of inertia of the carousel is 2440 kg·m2. Ten pieces of baggage with an average mass of 16.5 kg each are dropped vertically onto th...

Physics
A stationary bicycle is raised off the ground, and its front wheel (m = 1.70 kg) is rotating at an angular velocity of 21.9 rad/s (see the figure). The front brake is then applied for 1.35 s, and the wheel slows down to 4.47 rad/s. Assume that all the mass of the wheel is conc...

algebra
thanks steve

algebra
suppose a ball is thrown upward from a height of 4.5 feet with an initial velocity of 21 feet per second. write an equation relating the time t and height h of the ball

English
the answer is b

English
the answer is b

English
no b

Steve
How do I find the vertex?

Damon
Sorry you were right my unit was wrong, thanks!

steve
As my final answer do I use ft or m ?

Damon
yes

Damon
Okay this time my answer came to be 39.4 m but it still says incorrect. Did I not do my calculations correctly?

Damon
When I did that My answer came to be .501 but it was marked wrong. Was that the answer I was supposed to get?

physics
A lighthouse that rises h1 = 47.0 ft above the surface of the water sits on a rocky cliff that extends d = 17.4 ft from its base, as shown in the figure below. A sailor on the deck of a ship sights the top of the lighthouse at an angle of theta = 29.3 degree above the horizont...

Damon
I know but which values do I plug in?

Damon
For part E which x and y do I plug in?

physics
Data: theta_1 = 44.9 theta_2 = 146.1 A = 4.8 cm B = 8.7 cm A)What is the x component of vector A? B)What is the y component of vector A? C)What is the x component of vector B? D)What is the y component of vector B? E)What is the magnitude of vector (A + B)?

Damon
yes in terms of vf. we are asked to combine different kinematic equations to drive xf. I believe the equation v=vo+at^2 can sub for vo. does this make sense?

Physics
A hot-air balloon is rising upward with a constant speed of 2.20 m/s. When the balloon is 2.50 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

math
16 times 4 which equals 64 so the length of the rope was 64 inches

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