# Posts by jj

Total # Posts: 1,046

**3rd grade math**

12

*March 29, 2011*

**5th grade math**

960 divided by 8

*March 29, 2011*

**math**

The mean weight of 75 2nd graders is 55.7 lbs and the mean weight of 25 1st graders is 42.6 lb. What is the mean weight of the 100 children

*March 28, 2011*

**computers**

A relational database for a real-world client what would be the example ?

*March 25, 2011*

**Physics**

soorry i was wrong it is 1.2

*March 20, 2011*

**Physics**

8.0x10-11

*March 20, 2011*

**math**

solve this problem using the power rule (10x^8) x (10x^10) =

*March 8, 2011*

**geometry regular polygon**

302.4cm^2

*March 6, 2011*

**ap chemistry**

methanol and ethanol are common organic solvents. if the mole fraction of CH3OH in a mixture of the two solvents is 0.4 what is the mole fraction of methanol in the vapor in equilibrium wih the liquid mixture at room temperature 25 celius. the vapor pressure ofmethanol and ...

*February 23, 2011*

**physics**

Vector vector A has a magnitude of 27 units and points in the positive y-direction. When vector vector B is added to vector A , the resultant vector vector A + vector B points in the negative y-direction with a magnitude of 18 units. Find the magnitude of vector B ?

*February 10, 2011*

**physics**

1.403

*February 1, 2011*

**stats**

40.13

*January 29, 2011*

**Language Art**

How to write goalie in a possesive form sentence

*January 25, 2011*

**java programming**

This is the code what i tried but its not thw thing i want import javax.swing.*; public class Letter { private String sendername; private String recipientname; private String bodyletter; public static void sender (String nsender) { String name= "a"; } public static ...

*January 20, 2011*

**java programming**

Provide a class called Letter for authoring a simple letter. The letter class has three data fields, the name of the sender, the name of the recipient, a body of the letter. 1. Supply the class constructors (default , and overloaded ) 2. Supply a method. Public void addLine (...

*January 20, 2011*

**Physics**

east - 12.04 north - 8.43

*January 19, 2011*

**Physics**

$53,240.597

*January 18, 2011*

**Physical Science**

A 15 Kg object that is free falling has a total mechanical energy of 13,230 Joules. (A) From what height was the object dropped? (B) What is the velocity of the object when it hits the ground? (C) How long does the object fall?

*January 8, 2011*

**Biology**

Suppose in a breeding experiment, you combined 7,000 AA individuals and 3,000 aa individuals, and they mated randomly. After the first generation, what would be the value of p2 (p squared) ? of q2 (q squared)? of 2 pq? what would be the value after the second generation if the...

*January 4, 2011*

**Programming Java**

I have to create an analog clock..What methods should i use

*December 22, 2010*

**Chemisrty**

Kate has 35 grams of xenon gas in a 15 liter tank at 11 degrees celsius and 250 atmospheres. If she heats the gas in the tank up to 2500 degrees celsius, what will its pressure be, in Kilopascals?

*December 19, 2010*

**Physics**

A puddle holds 150 g of water. If 0.50 g of water evaporates from the surface, what is the approximate temperature change of the remaining water? (Lv = 540 cal/g)

*December 19, 2010*

**Physics**

If a 1000-kg car was moving at 30 m/s, what would be its kinetic energy expressed in the unusual (for kinetic energy) units of calories? (1 cal = 4.186 J)

*December 19, 2010*

**Physics**

A 2.00-kg block of ice is at STP (0°C, 1 atm) while it melts completely to water. What is its change in entropy? (For ice, Lf = 3.34 ´ 105 J/kg)

*December 19, 2010*

**Physics**

A heat engine exhausts 3 000 J of heat while performing 1 500 J of useful work. What is the efficiency of the engine?

*December 19, 2010*

**Physics**

A 10-kg piece of aluminum (which has a specific heat of 900 J/kg×°C) is warmed so that its temperature increases by 5.0 C°. How much heat was transferred into it?

*December 19, 2010*

**physics**

Ok thank you

*December 19, 2010*

**physics**

This is my work :) (50miles/hr)x(1.609km/1mile)x(1000m/1km)x(1meter/60sec)x(1hour/60 min) =22.35 meter per second.

*December 18, 2010*

**physics**

what is 50 miles per hour in meters per second ?

*December 18, 2010*

**physics**

what is 50 miles per hour in meters per second?

*December 18, 2010*

**Physics**

(6.5 ft) x(1meter/3.281ft) =1.98 meters. Is this a correct way ?

*December 18, 2010*

**Physics**

A player height is 6.5 ft.What is his height in meters ?( 1m = 3.281ft)

*December 18, 2010*

**computer**

I have to write a researh paper on Intel Core i3 processor ? I need some ideas

*December 17, 2010*

**Algebra**

thank u sooo much!!!!!!!:)

*December 14, 2010*

**Algebra**

Kevin has $6.45 in coins in his cash box. The numbers of quarters is one less than twice the number of dimes. The number of nickels is one less than twice the number of quarters. The value of the pennies is the same as the value of the nickels. How many of each Type of coin ...

*December 14, 2010*

**computer architecture**

How many bits does a word of storage contain on the IBM-PC?

*December 12, 2010*

**java programming**

Enhance bank account class by adding preconditions for the constructor and the deposit method that require the amount parameter to be atleast zero, and a precondition for the withdraw method that requires amount to be a value between 0 and the current balance.Use assertions to...

*December 9, 2010*

**MATHS**

A man is 2 years younger than his wife.Their current ages both are prime numbers. Next year his wife age will be a multiple of 11.And the husband will be the product of two consecutives. How old are both ?

*December 1, 2010*

**physics**

3.8x10^-8

*December 1, 2010*

**physics**

What is the magnetic force acting on an electron if its speed is 3.0 × 106 meters/second and the direction is perpendicular to a magnetic field of 0.020 teslas? The value of q = -1.6 × 10-19 coulombs.

*November 30, 2010*

**Physics**

A player is 6.5 ft tall.What is the player’s height in meters?

*November 29, 2010*

**english**

well thanks but i need 3 sources and i have to descibe my applications in detail and i cant find all the applications in just 3 sources

*November 28, 2010*

**english**

Sap is known as System Application and product. It creates same database where it can run all the applications in a company. Basically it is software which allows the people in businesses to keep track and updates of their customers and business communications and dealings. It...

*November 28, 2010*

**english**

i have to write a research paper on SAP Applications and i need some authentic websites ?

*November 28, 2010*

**english**

is it right when we say am confused or i am in confusion or confused ?

*November 25, 2010*

**Calculus**

Compute the derivatives of : f(x)= x^7 + 7^x+ 7^7

*November 22, 2010*

**PHYSICS**

What is the reaction effect of the following action effects? a) Earth orbits the sun b) Ball accelerates downward Thank YOu.

*November 21, 2010*

**PHYSICS**

What is the reaction effect of the following action effects? a) Earth orbits the sun b) Ball accelerates downward Thank YOu.

*November 21, 2010*

**PHYSICS**

Indentify the direction of the netforce in each of the following situations. A marble moves in a circular path inside a paper plate at a constant speed. The moon orbits the earth. An air hockey puck moves smoothly across the air hockey table after being struck. A rocket is ...

*November 20, 2010*

**PHYSICS**

Indentify the direction of the netforce in each of the following situations. A marble moves in a circular path inside a paper plate at a constant speed. The moon orbits the earth. An air hockey puck moves smoothly across the air hockey table after being struck. A rocket is ...

*November 19, 2010*

**math**

Use a linear approximation (or differentials) to estimate the given number. e^-0.01

*November 17, 2010*

**Physics**

I think it's the first person because in order to finish something faster, it will require more work. For example in a race. The person who finishes first has to run faster.

*November 15, 2010*

**PHYSICS**

If a goalie faces an 80mph slap shot hit from 40 feet away, how much time is there before puck arrives at the net (5280ft= 1 mile) If the goalie requires half of the above time to complete his move to deflect the puck, how much time does the goalie have to react?

*November 15, 2010*

**Chem**

Determine the number of moles of silver chloride formed when three moles of sodium chloride are reacted completely with silver nitrate

*November 15, 2010*

**Calculus**

The length of a rectangle is increasing at a rate of 9 cm/s and its width is increasing at a rate of 7 cm/s. When the length is 15 cm and the width is 10 cm, how fast is the area of the rectangle increasing?

*November 9, 2010*

**cal**

Differentiate the function. f(x) = sin(7 ln x)

*November 9, 2010*

**10th grade**

BC=3x+2 and CD= 5x-10. Solve for x.

*October 30, 2010*

**social studies**

1. What was the first PERMANENT European colony in North America? hope someone can help!!

*October 27, 2010*

**Accounting**

That would be 200,000 times the future value of a single sum factor (which is found in the tables) 6% at 5 years which is 1.33823. So 200,000(1.33823)=267,646 the answer is C.

*October 26, 2010*

**Please Algebra 1**

Roberta sold fifty tickets for the school play. Roberta sold ten more student tickets than adult tickets. How many student tickets did Roberta sell? From this result, if the total cost of a student ticket was three-fourths the cost of an adult ticket, and Roberta collected a ...

*October 17, 2010*

**math**

its 10

*October 12, 2010*

**PreCalc**

The decibel (dB) is defined as dB= 10log (P2/P1), where P2 is the power of a particular signal. P1 is the power of some reference signal. In the case of sounds, the reference signal is a sound level that is just barely audible.How many dBs does a sound have if its power is 665...

*October 9, 2010*

**physics**

This is what I found.... When the car is at the top of the track the centripetal force consists of the full weight of the car. mv2/r = mg Applying the conservation of energy between the bottom and the top of the track gives (1/2)mv^2 + mg(2r) = (1/2)mv0^2 Using both of the ...

*October 8, 2010*

**Math**

Sheila's age is two years more than twice Nicole's age. The sum of their ages is the same as Steven's age. If Steven's age is ten years less than five times Nicole's age, ,find the age of each. Write a verbal model!

*October 6, 2010*

**english**

Examples of personal interaction with a friend or family member about personal finance or credit cards. This is an emergency!!! Help please

*September 24, 2010*

**6th grade science**

Science - kk, Friday, January 2, 2015 at 2:38pm 1. a 2. d 3. a 4. a those are the correct answers i got 4/4 with them

*September 17, 2010*

**geometry**

raise pq and qr are perpendicular point s lies in the interior of angle pqr if measure of the angle pqs equals 4=7a and the measure of angle sqr = 9+4a find the measure of angle pqs and sqr

*September 8, 2010*

**Anatomy and Physiology**

Each nerve impulse begins in the dendrites of a neuron's. the impulse move rapidly toward the neuron's cell body and then down the axon until it reaches the axon tip. a nerve impulse travels along the neuron in the form of electrical and chemical signals. Acetylcholine...

*July 31, 2010*

**Calculus**

Application of Derivatives and Integrals: A sign 3 feet high is placed on a wall with its base 2 feet above the eye level of a woman attempting to read it. How far from the wall should she stand to get the best view of the sign, that is, so that the angle subtended at the ...

*July 11, 2010*

**Calculus**

A sign 3 feet high is placed on a wall with its base 2 feet above the eye level of a woman attempting to read it. How far from the wall should she stand to get the best view of the sign, that is, so that the angle subtended at the woman’s eye by the sign is a maximum?

*July 11, 2010*

**math**

Thanks for the help!

*June 2, 2010*

**math**

Solve for x= x^2 + 45= 6x

*June 2, 2010*

**Information Science**

how do I begin the project

*June 1, 2010*

**Math**

Simple interest investment made for a period of 4years to R7800 with an initial investment of R4000 for this investment

*May 29, 2010*

**Compters and software in a bussiness**

How are computers and software aplications utilized in a bussiness setting to solve bussiness problems?

*May 21, 2010*

**Geo**

For questions 33 and 34, write the equations for the lines parallel and perpendicular to the given line through the given point (one point for each equation). x - 3y = 9 through (2, -1)

*May 21, 2010*

**intermidate alegebra**

ac Method 15t^ -17t-4 ac=15*4=60 This the ac Method can you help me finished this problem

*May 12, 2010*

**math**

y X 8 = 72

*May 10, 2010*

**english**

Did you know that Paul Revere rode through the countryside calling men to arms class? where does the comma belong? how can i rewrite this sentence with a comma?

*May 10, 2010*

**Chemistry**

How do you find pKa?

*May 5, 2010*

**algebra**

-21+3z/2 divide 121z-847/4

*May 4, 2010*

**algebra**

Thank you so much!

*May 3, 2010*

**algebra**

Bob mosw his lawn in 3 hours, Jane can mow the same lawn in 5 hours. How much time would it take for them to mow the lawn together?

*May 3, 2010*

**Pre-algebra**

Factor the expression 14+21c

*April 21, 2010*

**commas and run on sentences**

You got it

*April 21, 2010*

**Physics**

a basketball player is trying to make a half-court ump shot and releases the ball at the height of the basket. assuming that the ball is launched at 51 degrees, 14 m from the basket, what speed must the player give the ball?

*April 18, 2010*

**college**

Answer the problems below and show or explain how you arrived at your final answer. 1. You sell premium toasters and are making a pricing decision. At a price of $100 (or “p = $100”) you predict that you can sell 30 of these premium toasters at your Scottsdale, ...

*April 13, 2010*

**Algebra1**

a company sells brass and steel machine parts. One shipment contain 3 brass and 10 steel parts and cost 48.00. A second shipment contain 7 brass and 4 steel parts and cost 54.00. Find the cost of each type of machine part. How much would a shipment containing 10 brass and 13 ...

*April 10, 2010*

**math 156**

Indicate whether the sequence is arithmetic, geometric or neither 10,12,22,32,42.....

*April 7, 2010*

**calculus-limits??**

i keep on doing something wrong on this problem,i guess im forgetting to add or subtract some number. use f'(x)=lim h-->0 f(x+h)-f(x)/h to find the limit: lim h-->0 sin^(3)4(x+h)-sin^(3)4x/h

*March 24, 2010*

**math**

What are the number in the magic square of 4 by 4 if the magic number is 38?

*March 16, 2010*

**Chemistry**

Christ lover, you're a life saver!!!

*February 15, 2010*

**Art history**

Can you tell me if these sculptures have open or closed contour? I can't post the link but if you search the name and the numbers it should show up. Sculpture 1: Mother and Child [1979.206.121] Sculpture 2: Virgin and Child [33.23]

*February 3, 2010*

**Intro to art history**

I have to write a paper comparing two art sculptures. I have write if it's an open or closed contour but I don't know what that means.

*February 3, 2010*

**Accounting**

What kind of companies (industries) have negative cash flow from investing activities? And what kind of companies have positive cash flow from investing activities?

*January 26, 2010*

**chemistry**

describe the general characteristics of metals, nonmetals, and metalloids.

*January 24, 2010*

**Algebra**

Thank you for your help.

*January 21, 2010*

**Algebra**

John's insurance company will replace his car if repair costs exceed 80% of the car's value. The car recently sustained $8000 worth of damage, but it was not replaced. What was the value of his car?

*January 21, 2010*

**physics**

A tin can is filled with water to a depth of 30 cm. A hole 11 cm above the bottom of the can produces a stream of water that is directed at an angle of 34° above the horizontal. (a) Find the range of this stream of water. (b) Find the maximum height of this stream of water.

*January 14, 2010*

**physics**

Water flows in a cylindrical, horizontal pipe. As the pipe widens to twice its initial diameter the pressure in the pipe changes. Calculate the change in pressure between the wide and narrow regions of the pipe. Give your answer as an expression in terms of the density of ...

*January 14, 2010*