Monday

October 24, 2016
Total # Posts: 2,476

**Physics**

An air-hockey puck of mass m floats across the table essentially frictionless on a cushion of air. This puck bumps nearly head-on into a second puck that has 3 times the mass, moving in the opposite direction but with the same speed, v i , as the lighter puck. Immediately ...

*August 6, 2012*

**math**

a diving board is 4 feet above a pool that is 15 feet deep. The total length of a person's dive is 10 feet. How many feet below the surfac of the water did the person dive

*August 6, 2012*

**Earth Science**

I need help with the following Lab due tonight, 7/30/12, as I feel completely lost and would appreciate the help. The lab goes as follows: Design an experiment that illustrates the determination of the density of a cylindrical object found in the Lab Kit. Prepare a dynamic ...

*July 30, 2012*

**physics**

If an engine produces a (mass flow rate) of 100kg/s of thrust, what is the force in Newtons?

*July 19, 2012*

**Chemistry**

For the reaction 2NH3(g) 3H2(g) N2(g) at 472oC equilibrium is established when [H2] =0.0200M, [N2] = 0.0100M and [NH3] = 5.37x10^_8 M. What is the equilibrium constant for the reverse reaction?

*July 16, 2012*

**Physics**

A ball (mass m = 250 g) on the end of an ideal string is moving in a circular motion as a conical pendulum. The length L of the string is 1.84 m and the angle with the vertical is 37 degrees. a) What is the magnitude of the torque (N m) exerted on the ball about the support ...

*July 11, 2012*

**Physics**

Any idea how I was hung up on 2nd one?

*July 11, 2012*

**Physics**

A ball (mass m = 250 g) on the end of an ideal string is moving in a circular motion as a conical pendulum. The length L of the string is 1.84 m and the angle with the vertical is 37 degrees. a) What is the magnitude of the torque (N m) exerted on the ball about the support ...

*July 11, 2012*

**Trig**

Given y=2-4cos(3x-pi/4), find each of the following, giving the general representation of the location of all minimums. Also provide the graph of two full cycles, labeling everything. Domain = Range = Amplitude = Period = Ph. Shft. = Interval for one Complete cycle = ...

*July 9, 2012*

**pre cal**

verify identity (sinx-cosx)^2=1-sin(2x)

*June 30, 2012*

**Chem!**

20.4

*June 28, 2012*

**Algebra 1 (Scientific Notation)**

4.3 x109

*June 28, 2012*

**5 grade math**

Min's fish are sick,and she wants to add medicine to the tank. The base of the fish tank measures 40 cm by 25 cm.The tank is filled with water to a height of about 20 cm.How many drops of medicine should Min add to her tank? Reminder:1L=1,000cm squared

*June 23, 2012*

**math**

Min's fish are sick,and she wants to add medicine to the tank. The base of the fish tank measures 40 cm by 25 cm.The tank is filled with water to a height of about 20 cm.How many drops of medicine should Min add to her tank? Reminder:1L=1,000cm squared

*June 23, 2012*

**chem**

How many moles of C6H12O6 are formed when 0.250 mole of CO2 is consumed in the reaction 6 CO2 + 6 H2O C6H12O6 + 6 O2?

*June 20, 2012*

**Physics - Center of Mass**

The density of a 5.0-m long rod can be described by the linear density function λ(x) = 145 g/m + 14.2x g/m2. One end of the rod is positioned at x = 0 and the other at x = 5 m. a) Determine the total mass of the rod. b) Determine the center-of-mass coordinate.

*June 16, 2012*

**math**

j costs twice as much as b. b costs twice as much as k. all three letters together cost 17.50. what is the price of each letter?

*June 6, 2012*

**world history**

the evolution of the socio political milieu during colonial period, including protestant, christinity impact on colonial social life

*May 25, 2012*

**math**

solve csc^2x - cscx + 9 =11

*May 19, 2012*

**National Junior Honor Society Essay Check**

Nice essay

*May 15, 2012*

**algebra**

If the sales tax is 6.5%, how much tax will you pay on a jacket that costs $48?

*May 15, 2012*

**math**

When Ms. Jackson told her students that the circumference of a circle divided by the diameter of the circle is ð, Jarrod asked how this could be true for all circles. Of the following, which provides the best basis for explaining why this is true for all circles?

*May 11, 2012*

**english**

would this be a clause

*May 10, 2012*

**english**

thank you and the last one is We hit a snag while rowing to shore. and the italicized phrase is (while rowing )

*May 10, 2012*

**english**

past participle ?

*May 10, 2012*

**english**

so it can be one of these: past participial phrase noun clause adverb clause nominative absolute ellipitical clause but its not a clause

*May 10, 2012*

**english**

its confused and sign

*May 10, 2012*

**english**

plz help fast

*May 10, 2012*

**english**

(confused) is italizied

*May 10, 2012*

**english**

What type of clause or phrase is italicized in the sentence below? The driver, confused by the sign, made a wrong turn.

*May 10, 2012*

**statistics**

psychologist wants to interview subjects with IQ scores are normally distributed with mean of 100 and standard deviation of 15. find the score that separating the top of IQ frin the bottom 90%

*May 9, 2012*

**mathematics - sinusoidal curves**

Arnab means rabbit lol

*May 5, 2012*

**english/check please**

I have to change the sentences on the top by adding an interjection and put a punctuation. I need to know did I use the correct interjections and the right punctuations too forget about the spaces before each exclamation . please just correct my interjection words and the ...

*May 2, 2012*

**english/check please**

Add an interjection to each of these sentences. Be sure to punctuate correctly. 1- Isn't that beautiful? - Ah! isn't that beautiful ? 2-We're having a test . - My goodness ! Were having a test ! 3- That hurts. - Ouch ! That hurts ! 4- I ripped my best shirt. -Wow...

*May 2, 2012*

**english**

Write whether a sentence is simple, compound, complex, or compound-complex. 5-The day of the party arrived, and everyone showed up at the Huang's house in costume. Compound 6-Kim wanted a new watch for a graduation gift. Simple 7-Because she was swimmer,she wanted one that...

*May 1, 2012*

**english**

Write whether a sentence is simple, compound, complex, or compound-complex. 1-Mrs. Huang planned a party for Kim because she was graduating from high school. Complex 2=She invited Lisa,Elena,and Enrique to the party. Simple 3-Mr. Huang thought that kim's friends should ...

*May 1, 2012*

**english**

A complex sentence made from independent clause and dependent clause joined together

*May 1, 2012*

**english**

5-complex

*May 1, 2012*

**english**

1-compound 2-complex 3-complex 5-compound

*May 1, 2012*

**english**

Write if the sentence is simple, compound,or complex. 1-I'd like to help you ;however,I am very busy today. complex 2-Do you know what Willie said.simple 3-I think that I've seen that movie before.simple 4-The person in the middle of the line is my brother Willie....

*May 1, 2012*

**english/help me**

Ralph,who is a student,also has a part-time job. 1)What is the independent clause in this sentence? who is a student,also has a part-time job. 2)What kind of dependent clause is( who is a student) in this sentence? Is it a noun, adjective,or adverb clause? Adjective clause I ...

*May 1, 2012*

**english**

Ralph,also has a part time job is the independent

*May 1, 2012*

**english/writeteacher**

Ralph,who is a student,also has a part-time job. 1)What is the independent clause in this sentence? also has a part-time 2)What kind of dependent clause is( who is a student) in this sentence? Is it a noun, adjective,or adverb clause? -a noun 1) who is a student,also has a ...

*May 1, 2012*

**english**

1) who is a student,also has a part-time job. Is the independent. hope is right.

*May 1, 2012*

**english**

1) 2) is an adjective clause. It describe a word or a group of words in another clause.

*May 1, 2012*

**english**

1) Ralph,who is a student. Is the independent 2)Adveb clause

*May 1, 2012*

**english**

Ralph,who is a student,also has a part-time job. 1)What is the independent clause in this sentence? also has a part-time 2)What kind of dependent clause is( who is a student) in this sentence? Is it a noun, adjective,or adverb clause? -a noun

*May 1, 2012*

**english/check please**

1)Mrs King said ," I want a new putter."

*May 1, 2012*

**english/check please**

Change each of these indirect quotations to direct quotations.Punctuate your quotation properly. examples: - Mrs king said,"I enjoyed our golf game" _Mrs king said that she enjoyed the golf game. 1)Mrs.King said that she wants a new putter. -Mrs King said," I ...

*May 1, 2012*

**english/check please**

4)ok, it has to be compound ? But in my question I have only 2 choices either complex or compound-complex

*April 30, 2012*

**english/check please**

the sentence is complex

*April 30, 2012*

**english/check please**

4)Because of bad weather,the game was canceled,(ind)but it will be played tomorrow.(dep) and is compound complex IS it better now?

*April 30, 2012*

**english/check please**

2)dep clause, complex 4)what is wrong in 4is it all tell me where? 5)both of us know (ind)that we must study hard,(dep)or we will not get into good colleges,(ind) is compound complex

*April 30, 2012*

**english/check please**

Find the independent clauses and the dependent clauses.Write wether it is complex or compound-complex 1)Mr and Mrs Johnson play golf(ind) when the weather is warm.(dep)complex 2)What I would like is a vacation. independent,complex 3)Alicia works at the daycare center that is ...

*April 30, 2012*

**english /help **

label the subject and the verb of each of each clause. Then write whether the sentence is simple or complex. 1)Every afternoon the baseball team practices. subject: the baseball team verb: practices simple sentence 2)When practice is over, the players are tired. subject:...

*April 30, 2012*

**english/Writeacher**

Subjects: 1-team 2-players 3-they 4-baseball did I miss anything ?how about the verbs and sentence (simple, complex ) ?

*April 30, 2012*

**english/check please**

Subjects: 1-team 2-players 3-they 5-baseball did I miss anything ?how about the verbs and sentence (simple, complex ) ?

*April 30, 2012*

**english/check please**

label the subject and the verb of each of each clause. Then write whether the sentence is simple or complex. 1)Every afternoon the baseball team practices. subject: the baseball team verb: practices simple sentence 2)When practice is over, the players are tired. subject:...

*April 30, 2012*

**Desktop publishing- Illistrations**

1.c

*April 28, 2012*

**physics**

(a) What is the frequency of a photon whose energy is 3.5 times the rest energy of an electron? (b) What would be the linear momentum of the photon?

*April 27, 2012*

**math**

(8x to the 3rd power) (4x to the 2nd power) simplifi

*April 26, 2012*

**Physics**

Janet jumps off a high diving platform with a horizontal velocity of 1.73 m/s and lands in the water 1.8 s later. How high is the platform? The acceleration of gravity is 9.8 m/s2 . Answer in units of m

*April 22, 2012*

**life orientation**

ENVIRONMENTAL PROBLM

*April 20, 2012*

**Physics**

On a frictionless, horizontal air track, a glider oscillates at the end of an ideal spring of force constant 2.30 N/cm. The graph in the figure shows the acceleration of the glider as a function of time. Find the mass of the glider. Find the maximum displacement of the glider ...

*April 19, 2012*

**chem**

Calculate the molarity of a solution made by dissolving 0.150 in enough water to form exactly 730 of solution

*April 18, 2012*

**Physics**

A mass is oscillating with amplitude A at the end of a spring. How far (in terms of A) is this mass from the equilibrium position of the spring when the elastic potential energy equals the kinetic energy?

*April 18, 2012*

**Geometry.**

A park has a circular swimming pool. The diameter of the pool is 18 ft. What is the distance traveled if you swim around the edge of the pool once? Use pi = 3.14 A) 36 ft B) 169.65 ft C) 113.10 ft D) 56.52 ft I think it is [D] but I'm not sure.

*April 15, 2012*

**Geometry!**

The distance around the equator of Saturn is about 378,675 km. What is the equatorial diameter of Saturn? Use pi = 3.14. A) 241,209 B) 241,194 C) 120,584 D) 120,597 I think it is [D] but I'm not sure.

*April 15, 2012*

**Geometry**

Given that circle Q has a radius of 42, and radii line QR and line QS form an angle of 180, find the exact length of arc RS.

*April 15, 2012*

**Geometry**

Point A is 5 feet from the center of the circle and 11 feet from point B. Line AB is tangent to circle O at A. Find OB to the nearest tenth.

*April 15, 2012*

**Math**

For the following data... 1. Provide evidence as to whether this data set if Gaussian or non Gaussian. 2. Determine the normal reference range. 3. Define a cut-off. Describe how a ROC curve can be used to determine such. 95 95 81 95 98 79 88 98 84 79 98 84 81 96 102 86 90 101 ...

*April 12, 2012*

**Physics**

A satellite used in a cellular telephone network has a mass of 2160 kg and is in a circular orbit at a height of 670 km above the surface of the earth. What is the gravitational force Fgrav on the satellite? Take the gravitational constant to be = 6.67×10−11 N*m^2/...

*April 12, 2012*

**Physics**

Four identical masses of mass 900 kg each are placed at the corners of a square whose side lengths are 15.0 cm. What is the magnitude of the net gravitational force on one of the masses, due to the other three?

*April 12, 2012*

**Physics**

At what distance above the surface of the earth is the acceleration due to the earth's gravity 0.790 m/s^2 if the acceleration due to gravity at the surface has magnitude .

*April 12, 2012*

**Statistics**

18. Suppose that the scores of architects on a particular creativity test are normally distributed. Using a normal curve table, what percentage of architects have Z scores: Above .10? Below .10? Above .20? Below .20? Above 1.10? Below 1.10? Above -.10? Below -.10? You need to ...

*April 9, 2012*

**Math**

Brandon's bedroom floor is 12ft by 8ft. How many square feet of carpet are needed to replace his old carpet?

*April 8, 2012*

**Math**

June rides the 15 foot tall ferris wheel at the city fair. She enters the ride at the bottom. If the ride makes 8 complete rotations before stopping, what is the total distance that June travels?

*April 8, 2012*

**math**

2x+2y=1 This one is obvious. Just divide the coefficients by each other, and take any inequalities and subtract them by themselves. 3x-y=6 This one is a bit tougher. First, you need to square everything. Then add 4, subtract 7, and take the square root of it all. It may not ...

*April 7, 2012*

**Physics. PLEASE HELP!!**

6 m/s

*April 7, 2012*

**Physics**

A stiff uniform wire of mass M_0 and length L_0 is cut, bent, and the parts soldered together so that it forms a circular wheel having four identical spokes coming out from the center. None of the wire is wasted, and you can neglect the mass of the solder. What is the moment ...

*April 5, 2012*

**Physics**

A 5.80 kg ball is dropped from a height of 14.5 m above one end of a uniform bar that pivots at its center. The bar has mass 9.00 kg and is 6.40 m in length. At the other end of the bar sits another 5.30 kg ball, unattached to the bar. The dropped ball sticks to the bar after ...

*April 5, 2012*

**physics**

What is the density of nitrogen gas (molecular mass = 28 u) at a pressure of 1.2 atmospheres and a temperature of 284 K?

*April 3, 2012*

**Physics**

A bowling ball rolls without slipping up a ramp that slopes upward at an angle (beta) to the horizontal. Treat the ball as a uniform, solid sphere, ignoring the finger holes. What is the acceleration of the center of mass of the ball? Express your answer in terms of the ...

*April 3, 2012*

**programming**

you should probably mention the language its in.

*April 3, 2012*

**Calculus**

Use linear approximation, i.e. the tangent line, to approximate (1/0.504) as follows: Find the equation of the tangent line to f(x)=1/x at a "nice" point near 0.504. Then use this to approximate (1/0.504).

*April 3, 2012*

**Calculus**

i havent posted 7 questions...

*April 3, 2012*

**Calculus**

A 12 foot ladder is leaning against a wall. If the top slips down the wall at a rate of 4 ft/s, how fast will the foot be moving away from the wall when the top is 8 feet above the ground?

*April 3, 2012*

**Calculus**

Water is leaking out of an inverted right conical tank at a rate of 0.0115 m^3/min. At the same time water is being pumped into the tank at a constant rate. The tank has height 11 meters and the diameter at the top is 7 meters. If the water level is rising at a rate of 0.17 m/...

*April 3, 2012*

**Calculus**

A water tank is shaped like an inverted right circular cone with a base radius of 14 feet and a height of 25 feet high. If water flows into the tank at a rate of 20 ft^3/min, how fast is the depth of the water increasing when the water is 18 feet deep?

*April 3, 2012*

**Calculus**

A boat is pulled into a dock by means of a rope attached to a pulley on the dock. The rope is attached to the front of the boat, which is 7 feet below the level of the pulley. If the rope is pulled through the pulley at a rate of 18 ft/min, at what rate will the boat be ...

*April 3, 2012*

**Calculus**

A spherical snowball is melting so that its diameter is decreasing at rate of 0.1 cm/min. At what is the rate is the volume of the snowball changing when the diameter is 12 cm?

*April 3, 2012*

**Calculus**

A street light is at the top of a 19 foot tall pole. A 6 foot tall woman walks away from the pole with a speed of 7 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 30 feet from the base of the pole?

*April 3, 2012*

**AP CHEM **

When 0.03 moles of lead(II) nitrate are dissolved in enough water to make 266 milliliters of solution, what is the molar concentration of nitrate ions? Answer in units of M I already tried moles per liter and it says it is wrong.

*April 1, 2012*

**Chemistry**

Yeah I'm referring to the phase diagram and the Solid/Liquid line

*March 29, 2012*

**Chemistry**

I think the negative sign implies that the slope between S and L is negative so as you increase Pressure you will get a small T. But what formula did you use to find delta T.

*March 29, 2012*

**Fantel**

The heat of vaporization of water is 40.66 kJ/mol. Assuming sweat is 100% water, how much heat is removed from your body through the evaporation of 3.50 g of sweat?

*March 28, 2012*

**math**

hi if the second term of a sequence is root(2) and the seventh term is 8 what is the nth term equation(Geometric sequence) thanks

*March 26, 2012*

**statistics**

Elesha.. I don't understand your answers

*March 26, 2012*

**Math**

the volume of a rectangular prism is 256 cubic centimeters. What is the volume of a similar rectangular prism that has edge lengths one fourth as long as the edge lengths of the original prism?

*March 26, 2012*

**science**

a 2000 kg sedan is traveling west at 25m/s. How would the sedan's momentum change if it slowed down to 10 m/s?

*March 25, 2012*