Posts by sam

Total # Posts: 5,286

grammar
Have you seen my sister Karla around here today?

College Physics
A.) Q1' = (Q total/r total)*r1 = (7/3r)*r = 7/3 = 2.33 nC B.) Q2' = (Q total/r total)*r1 = (7/3r)*2r = 14/3 = 4.67 nC

College Physics
A.) Q1' = (Q total/r total)*r1 = (5/3r)*r = 5/3 = 2.33 nC B.) Q2' = (Q total/r total)*r1 = (5/3r)*2r = 10/3 = 4.67 nC

science
wow i just cant explain Iun ur amazing at helping us out! thx!!

calculus
Determine whether the given series converges or diverges, and find the sum if it converges. I don't understand, help!! Thnx! 1) 20+5+(5/4)+(5/16)+...

physics
The gravitational field strength at 35700km above earth is .225N/kg. what is the tangental velocity of a 100000kg communication satellite? mass of earth = 5.98E24kg and radius of earth = 6.37E6m

physics
a 2000kg car approaches a 1000m radius curve. If the amount of friction is 1800 N and it have velocity of 30m/sec will the car be able to make the turn?

physics
how fast must a .11kg toy car travel at the top of a loop in toy track not to fall off if the radius of the loop is .15m?

science
Why can an array of smaller interferometers have a better angular resolution than one large interferometer?

Chem
The mass of a golf ball is 45.9g g . If it leaves the tee with a speed of 70.0m/s m/s , what is its corresponding wavelength?

Trigonometric Functions
Given the equation y=3sin(3x-180)-2 state the domain, range, amplitude, period, and phase shift of the cycle.

Trigonometric Functions
The average depth of the water in a port on a tidal river is 4m. At low tide, the depth of the water is 2m. One cycle is completed approximately every 12h. a)Find an equation of the depth, d(t)metres, with respect to the average depth, as a function of the time, t hours, after...

science
b

physics
A climber stands on a ledge on one side of a valley. He claps his hands and hears an echo from the opposite side of the valley 1.6 s later. How wide is the valley?

trig
On a typical day at an ocean port, the water has a maximum depth of 18m at 6:00 am. The minimum depth of 9m occurs 6.8 hours later. Write an equation to describe the relationship between the depth and time.

algebra
x5−8x4+28x3−56x2+64x−32=0

Math
A six sided die is tossed. What is the probability that it shows a prime number if you know the following? a. It shows an even number. b. It shows a number less than 5. c. It does not show a 6. d. It shows 1 or 2/ e. It shows an even number less than 4. f. It shows a number ...

Physics
Please explain to me how to do this question!!!!!!! A beam consists of singly ionised neon-20 atoms all travelling at the same speed, 3*10^5 m/s, through a vacuum. As the beam passes through the magnetic field it follows a circular path of radius 0.125m. The force on each of ...

physics
The planet Jupiter has a satellite, Io, which travels in an orbit of radius 4.220×108 m with a period of 1.77 days. Calculate the mass of Jupiter from this information.

Probability
It should be <= 319.9955

Probability
It should be 319

math
Reggie knows the length and width of a rectangle. How can he find the perimeter of the rectangle

Probability
b=0.471

Chemistry-need help ASAP
again don't know where to start, really just want a step by step so I can do the rest of my homework

Chemistry-need help ASAP
15 ml of 3.0 M NaOH are added to the following: 500.0 ml of pure water 500.0 ml of 0.1 M formic acid 500.0 ml of 0.1 M formate of potassium 500.0 ml of a solution containing 0.1 M formic acid and 0.1 M formate of potassium. Calculate the difference of pH resulting from the ...

Chemistry
i don't even know where to start, I'm really confused on this topic in chemistry, I just want to see at step by step way to solvethis problem.

Chemistry
Titration of 50.0 ml of acetic acid reaches equivalence after delivery of 22.5 ml of standardized NaOH 0.21 M. What is the initial concentration of acetic acid and what is the pH of the solution? What is the pH at equivalence? What is the pH after addition of 20.0 ml of NaOH? ...

physics
A staging that weighs 210 N supports two painters, one 310 N and the other 440 N. The reading in the left scale is Fℓ = 320 N. What is the reading Fr in the right hand scale? Answer in units of N

English III
Could you post the answers you got after turning in the assignment

physics
these are the choices for the answer: Consider the rotational motion of two compact discs (CD). Disc A undergoes a rotation of 540 degrees in 1.50 secs, and disc B undergoes a rotation of π radians in 3.00 secs. a) Angular speed (A) = 4π radians/sec Angular speed (B...

Probability
4b. ((1-p)*(5*p-1))/(4*p)

reading
what general statement you make about Babe Didrikson and women athletes?

physics113
Heat can be defined as in phy113

phy113
What mass of ice is needed to cool 60g of water from 43oC to 20oC

phy113
An ungraduated mercury thermometer attached to a millimeter scale reads 22.8 mm in ice and 242mm in steam at standard pressure. What will the millimeter read when the temperature is. 20oC?

chemistry
Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent. When 2.50 g of quinine is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 6.43 °C. ...

math
CALCULATE if 1/3of the candles are pink 3/8 are yellow and 1/4 is blue remaining 2 are white

Physics
A doubly charged ion is accelerated to an energy of 33.0 keV by the electric field between two parallel conducting plates separated by 1.70 cm. What is the electric field strength between the plates?

Physics
Two parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts. (a) What is the electric field strength between them, if the potential 8.50 cm from the zero volt plate (and 1.50 cm from the other) is 540 V? (b) What is the voltage between...

Science**updated asnwers**
Ms.Sue I know I am not part of this but I hope you know that there are a lot of kids on this site and I don't think you should be saying you have been using drugs. This is not a good influence on younger kids.

PHysiscs
Four acrobats of mass 83.5 kg, 68.0 kg, 62.0 kg, and 55.0 kg form a human tower, with each acrobat standing on the shoulders of another acrobat. The 83.5-kg acrobat is at the bottom of the tower. (a) What is the normal force acting on the 83.5-kg acrobat?

Algebra
1. (1,3) 2. maximum 3. 42 feet 4. 11, -11 5. -7, -1 6. -6, 4 7. 0, 5/2 8. 3.33 I got 8/8 with this

Physics
A truck with 0.100 m radius tires travels at 24.0 m/s. At how many radians per second are the tires rotating? What is this in rpm?

Physics
An automobile with 0.310 m radius tires travels 85,000 km before wearing them out. How many revolutions do the tires make, neglecting any backing up and any change in radius due to wear?

Physics
In lacrosse, a ball is thrown from a net on the end of a stick by rotating the stick and forearm about the elbow. If the angular velocity of the ball about the elbow joint is 30.0 rad/s and the ball is 1.05 m from the elbow joint, what is the velocity of the ball?

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 ...

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 ...

math
S0rry i meant to say idid this befofe i asked for help. It didn't 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?

Spelling
iam helping my 4th graders with spelling/reading

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

please check(Social studies)
5 is D in case anyone is interested

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 ...

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

math 3
4 layers

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 don't 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 don't know if they are correct. example...

Social Studies--Check My Answers Please--
shia is 100

Social Studies
anonymous is 100%

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?

Science
I think it's A but I'm not sure

math
thank you

math
sorry i still don't 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.

Statistics
Its x~Bin(32,.98) since were looking for when it WILL operate and x = 32.

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

Social Studies--Check My Answers Please--
100% thanks Diana!

science
Southeaster

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 ...

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 ...

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(...

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

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