Saturday
November 22, 2014

Posts by josh


Total # Posts: 1,529

biology
Yes there still would have been a source of carbon dioxide being introduced into the water. "Carbon Dioxide is present in water in the form of a dissolved gas.Surface waters normally contain less than 10 ppm free carbon dioxide, while some ground waters may easily exceed ...
October 28, 2010

Chemistry
Is it still a single displacement reaction? can you walk me thru predicting the reaction and then balancing it. I'm lost.
October 27, 2010

Chemistry
Can anyone tell me why the answer that I got here is not correct? Pb(s) + AgNO3(aq) yields Ag(s) + PbNO3(s)
October 27, 2010

3rd grade shurley english
what does s, f,scs, scv mean when indentifying(labeling) sentences thanks
October 26, 2010

Signals
I have the following information: H(jw) = (3+jw)/(e^(2jw)) f(t) = e^(-3t)u(t) Therefore, F(w) = 1/(3+jw) Y(w) = H(w)*F(w) = 1/(e^(2jw)) I have to find y(t), but I am having troubling finding.
October 22, 2010

physics
A model rocket is constructed with a motor that can provide a total impulse of 25.5 N · s. The mass of the rocket is 0.213 kg. What is the speed that this rocket achieves when launched from rest? Neglect the effects of gravity and air resistance.
October 21, 2010

chemistry
how many atoms are in 26 moles of Ag
October 21, 2010

algebra
I don;t know how to solve the following equation. 9+6x=-6x+105 I have -6x +6x -105 -105 -96=12x 12 12 x=8
October 21, 2010

algebra
I don;t know how to solve the following equation. 9+6x=-6x+105 I have -6x +6x -105 -105 -96=12x 12 12 x=8
October 21, 2010

math
how do you solve 0.32/8.64=
October 18, 2010

math
write an expression.there were22 students in the clsass but some were absent
October 18, 2010

math
find the value of expression 5+2+6 (8-7)+1 6-(3+1)
October 18, 2010

11th grade
vix = 4.33 viy = 2.5 vx = 4.33 viy = -2.5 vix= 5 * cos(30) viy= 5 * sin (30) vx= the same because no force is acting on it vy= -viy because nature of parabolic motion and ball is travelling down
October 17, 2010

maths
a fasrmer has 46 animals.He has fewer 6 sheep than pigs. how many pigs does he have?
October 16, 2010

Organic Chemistry Lab
The solid pellet will contain the waxes, cellulose, and salt crystals. The supernatant will contain the pigments, water, sugars,and starch.
October 12, 2010

6th grade math
Add one set of parentheses to the expression - 7 * x + 3 + 8 * x + 3 * x + 8 - 9 so that it is equivalent to 2(9x + 10)
October 11, 2010

us history
Distinguish between "older culture" and "new culture" present in 18th century colonial America, and discuss the value conflict that emerged between the two.
October 11, 2010

organic chem
7. An unknown compound, C8H14, is optically active. Hydrogenation of the unknown yields 4-methylheptane. Ozonolysis of the unknown yields ethanol and 2- methylpropandial. Suggest a structure for the unknown consistent with the above date. please help
October 11, 2010

physics
A boat initially traveling at 10 meters per second accelerates uniformly at the rate of 5.0 meters per second squared for 10 seconds. How far does the boat travel during this time?
October 8, 2010

Chemistry
The law of conservation of mass states that no change is observed in the total mass of the substances involved in a chemical change. Thus the mass of the sulfur dioxide produced is the same amount as the sulfur and oxygen that went in. Does this sound correct to answer my ...
October 5, 2010

Chem
Is this on the right track?.....mass cannot be created/destroyed, although it may be rearranged in space, and changed into different types of particles. This implies that for any chemical process in a closed system, the mass of the reactants must equal the mass of the products.
October 5, 2010

Chem
Sulfur burns in the presence of oxygen to produce sulfur dioxide. Explain how the mass of sulfur dioxide produced compares to the combined mass of sulfur and oxygen.
October 5, 2010

physics/ math
Water flows (v approx. 0) over a dam at the rate of 660 kg/s and falls vertically 86 m before striking the turbine blades. Calculate the rate at which mechanical energy is transferred to the turbine blades, assuming 53% efficiency.
October 5, 2010

physics
A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate?
October 5, 2010

math
explain how you could show five less than a number using an expression
October 4, 2010

Chemistry 20
If 40. kJ of energy are absorbed by 450 g of water at 16 oC, what is the final temperature of the water?
October 4, 2010

Related Rates Problem
your kind of really bad at this
October 1, 2010

grammar
what is the simple predicate in The insects bodies can turn wood into food?
September 28, 2010

algebra
the equation is f(x) = (1/sq. root of 1-x^2) 1. f(x) is never zero. 2. 0 is in the domain of f 3. All negative real numbers are in the domain of f 4. All positive real numbers are in the domain of f 5. 1 is in the domain of f 6. f(x) is never negative 7. f(x) is never positive...
September 24, 2010

math
r=13.14
September 22, 2010

math
-3.38=r-9.76
September 22, 2010

science
Water, Oil, and sediment
September 20, 2010

German
This was a worksheet and the instruction said to fill in the adjective endings, since the underlines wouldn’t show I put the spaces to be filled as parenthesis. The (-) means I think it does not need an ending and the (?) means im confused and not sure if it needs an ...
September 19, 2010

Physics
It should have read Physics as subject- I mistyped it-Please help me understand this
September 18, 2010

Physcis
An airplane flying at 120km/h due west moves into a region where the wind is blowing at 40km/h due east. If the plane's original vecotr velocity is Vplane, what is the expression for the plane's resulting velocity in terms of Vplane. a. 1/3 >Vplane b. 2/3>Vplane ...
September 18, 2010

Chemistry
A 279 lb fullback runs the 40 yd dash at a speed of 18.5 ± 0.1 mi/h.(a) What is his de broglie wavelength (in meters)?(b)what is the uncertainty of his position?
September 17, 2010

Physics
I have a problem with an atwood's machine problem. i have three tensions where T1 and T2 are on the left and T3 is on the right. Bottom left corner is block 2kg with T1 then another block 2kg with T2 on the left side. On the right side i have a block of 7kg with T3. I am ...
September 16, 2010

Physics
This is what i've done: (i) T3sin 47 = mg (ii) 37 = T3cos 47 so i said T3 = 54.2523 N 54.25(sin47)/g = m m = 3.96776 kg
September 15, 2010

Physics
In the figure below the left hand calbe has a tension T1 and makes an angle of 42 with the horizontal. the right hand calbe as a tension T3 and makes an angle of 47 with the horizontal. The horizontal cable connecting the two masses has a tension of 37 N. Determine the mass M2.
September 15, 2010

Algebra
What is the problem precisely? What is the question?
September 15, 2010

Algebra
I think the question is asking you if the function f(x) equals 8 WHEN x equals 8; true of false? since the function is f(x)= x + 8 the answer is false because 8+10=18
September 15, 2010

PHYSICS
Since average a= delta v/ delta t 340(.05)= delta v v=17 m/s Furthermore this launch velocity has the angle of 51 degrees. You then use your handy dandy trigonometric skills to find the horizontal and vertical components of the launch velocity. 17cos(51)= horizontal find the ...
September 15, 2010

math
if a^2 + b^2 = c^2 *equation for right triangles and c in your case is 32 meters and because the obj. is a squared the sides are equal to each other therefore: 2x^2 = 32^2 x = side of square AREA= x^2 therefore : x^2 = (32^2) / 2
September 15, 2010

physics
You need an initial velocity
September 14, 2010

9TH GRADE MATH
21=5-3=7-9*2=
September 13, 2010

Anatomy
If you stand with your arms down at your sides and lift them up to shoulder height is that Adduction or Flexion?
September 9, 2010

science
what is the scientific notation for 280 mm?
September 8, 2010

geometry
Rays PQ and QR are perpindicular. Point S lies on the interior of angle PQR. If m<PQS=4+7a adn m<SQR = 9+4a, find m<PQS and m<SQR
September 8, 2010

math
One year, China consumed 4 times as much energy as Brazil.Define a variable and write an expression for the amount of energy China used that year.I don't get the variable part and expression. Not the same person.
September 8, 2010

math
One year, China consumed 4 times as much energy as Brazil.Define a variable and write an expression for the amount of energy China used that year.I don't get the variable part and expression. Not the same person.
September 8, 2010

college
a rock is dropped off a bridge. How fast is it moving when it hits the water 2.5s later?
September 7, 2010

math
(17-5)(6+5) Do you know what's an expression is? Can you teach me how to do it?
August 31, 2010

math
(17-5)(6+5)
August 31, 2010

math
It means 14 divide by 2
August 31, 2010

math
14/2+3(5)
August 31, 2010

math
so, what's the right problem??????????
August 31, 2010

Math
Dave has quarters, dimes and nickles in his bank. He has 3 more dimes than quarters and 6 less nickles than quarters. There are 63 total coins. How many are quarters?
August 26, 2010

8th grade
what is a root word
August 24, 2010

PHYSICS LEC
please help...i need this immediately.. rolling friction. two bicycles are set rolling with the same initial speed of 3.50m/s on a long, straight road, and the distance each travels before its speed is reduced by half is measured. One tire is inflated to a pressure of 40psi ...
August 16, 2010

geometry
The length of a rectagle is 9 centimeters more than half the width. Find the legth if the perimeter is 60 centimeters.
August 14, 2010

chemistry
What mass of solute is needed to prepare 140 mL of 0.560 M KCl? how do i work this out?
August 14, 2010

PHYSICS LAB
a gold ball is hit with an initial velocity v0 = 53m/s at an angle of 50degrees above the horizontal. a)how high the ball go? b)what is the total time the ball is in the air? c)how far will the ball travel horizontally before it hits the ground?
August 10, 2010

physics
A long, vertical, straight wire carries a current I going upwards. The wire is perpendicular to the plane of a circular metal loop and passes through the center of the loop. The loop is allowed to fall and maintains its orientation with respect to the straight wire while doing...
July 28, 2010

physics
thanks, Bob!
July 28, 2010

physics
A step-down transformer has a turns ratio of 1:10 and its primary is connected across the terminals of a standard 120 V wall socket. A 330 ohm resistor is connected across the secondary of this transformer. What power P is dissipated in the resistor?
July 28, 2010

physics
The primary coil of a transformer is connected to a standard wall socket. A resistance R is connected across hte secondary coil. The resistance across the secondary coil is increased. What happens to the current in the primary coil, and what happens to the power being supplied...
July 28, 2010

PHYSICS
if by some suitable mechanism the falling body had been given an initial downward push instead of just being released, would the resulting value of (g) acceleration due to gravity have been different?why? tnx....please answer it...
July 26, 2010

PHYSICS
a)speed is the magnitude of instantaneous velocity. Is the average speed equal to the magnitude of the average velocity? Justify b)under what condition is the average equal to instantaneous velocity? c)a car travels 40 mph for 2 hrs and 60 mph for 3hrs.what is the average speed?
July 26, 2010

Eth 125
Ms. Sue. If you are uneducated enough as to refer to the concept of orientalism as people from asian countries. Please check your facts before posting answers. Orientalism clearly defined is answer C
July 21, 2010

ETH 125
B
July 21, 2010

physics
the forces on the table act on a ring but are said to be concurrent. if the cords were rigidly to the ring would the forces necessarily be concurrent?? will you please give me some explanation answers about this...thanks a lot..
July 20, 2010

pHysics
yeah...tnx drwls...you're the best...how can you answer all those questions in just one click... i hope to have that kind of knowledge too.. tnx again
July 20, 2010

pHysics
a rope 26 ft long is attached to two points A and B, 20 ft apart at the same level. A load of 250lb is carried at the middle of the rope. what force is exerted on A. please answer this immediately i need it...thanks a lot...
July 20, 2010

physics
a brick is dropped (0 initial speed) from the top of a building. the brick strikes the ground in 2.5 seconds. you may ignore air resistant so the brick is in free fall. A)how tall in meters is the building? B) what is the magnitude of the brick's velocity just before it ...
July 18, 2010

college
a ball is thrown vertically upward from the ground with the velocity of 30m/s, a)how long will it take to rise to its highest point? b)how high does the ball rise? c)how long after projection will the ball have the velocity of 10m/s upward? tnx
July 16, 2010

Geometry
An antique dealer visited three shops. She spent $25 at the first shop. At the second shop, she spent half of her remaining money. At the third shop, she spent one third of her remaining money and had $60 left. How much money did the dealer have originally?
July 12, 2010

Geometry
Larry, Lionel, and Lester painted a fence. Larry painted the first 1/3 of the fence. Lionel painted 3/5 of what rtemained. Lester painted the final 40 ft. How long is the fence?
July 12, 2010

geometry
A snail is crawling along a meter stick. At a certain point the snail stops. The snail needs to crawl three times as far as it has already crawled in order to be 4 cm from the end. How far has the snail already crawled?
July 12, 2010

physics
A person with mass 70 kg is climbing a ladder (length 6m, mass 20 kg) that leans against a smooth wall (no friction). A frictional force fs between the ladder and the floor keeps it from slipping. The angle between the ladder and the wall is 30 degrees. What is the magnitude ...
July 7, 2010

physics
Two identical loudspeakers are 2 m apart. A person stands 4.6 m from one speaker and 3.4 m from the other. What is the lowest frequency at which destructive interference will occur at this point?
July 4, 2010

physics
A 1210 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1820 N crate hangs from the far end of the beam. The angle between the beam and the horizontal is 30 degrees upwards and the angle between the horizontal and ...
June 28, 2010

physics
your approach makes a lot of sense. thanks for your help!
June 27, 2010

physics
a 20 g bullet strikes a 0.7 kg block attached to a fixed horizontal spring whose spring costant is 5600 N/m and sets it into vibration with an amplitude of 25 cm. What was the speed of the bullet before impact if the two objects move together after impact?
June 27, 2010

algerbra
i cant solve this can someone help me. 19.6 + X^2/2 ={(.007852*X /.001285)^2}/2 i know the answer is 1.01 but how do i get that
June 23, 2010

physics
how fast does the level of water in a full 2m high, 10cm diameter tank reduces when a 4cm diameter hole is opened at the bottom?
June 23, 2010

college physics
how fast does the level of water in a full 2m high, 10cm diameter tank reduces when a 4cm diameter hole is opened at the bottom?
June 22, 2010

college physics
find the weight of a piece of wood with a density of .5 g/cm cubed. which when attached to a 5kg stone in water it will sink. the density of the stone is 3g/cm cubed
June 22, 2010

Psychology
Post Hypnotic suggestions are best represented by which of the following Cocercive statements commands new ideas for self improvement Criticisms
June 16, 2010

Psychology
Either nightmares, night terrors, daydreams, or archetypical dreams
June 16, 2010

Psychology
What are dreams that contain symbolic characters and appear surreal?
June 16, 2010

health
The primary goal of wellness is the ability to achieve A.freedom from disease. B.a multicultural view of health. C.the highest possible quality of life. D.greater control over lifestyle decisions.
June 11, 2010

Science
using filtration??
June 11, 2010

Chemistry
LOL
June 11, 2010

college physics
find the frictional force exerted on a 20kg block pulled slowly over a horizontal floor using a rope which makes a 30 degree angle over the horizontal. the pulling force is 100N??? i found the Fn to be 146 N what do i do from there?
June 10, 2010

philosophy
What are key differences between the ontological, teleological, and cosmological arguments? Identify the philosopher who you think best supports his or her argument. Explain your answer briefly.
May 26, 2010

physics
a sled is pulled at a velocity across a horizontal snow surface. if a force of 8.0x10 to the first power N is being applied to a sled rope at an angle of 53 degrees to the ground, what is the magnitude force of friction
May 24, 2010

10th grade
the circle is circumscribed by the pentagon as shown (not drawn to scale). If QZ=10, YX=9, XW=9, UW=17, and SU=10, find the perimeter of the pentagon.
May 20, 2010

englsh 3
we are doing conjuction and compound sentences in class, and i need help diagraming this sentence: Little Red Ridinghood and her mother packed her basket witk cookies for her grandma.
May 19, 2010

Government
Which of the following is not a long term trend marking the expansion of suffrage in the United States?
May 19, 2010

5th grade math
Thanks! It was hard when I wasnt thinking that way! Now, I am able to do the rest of my homework without any trouble! Thanks for explaining it!
May 14, 2010

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