Tuesday

October 6, 2015
Total # Posts: 869

**physics**

In lacrosse, a ball is thrown from a net on the end of stick by rotating the stick and forearm about the elbow. If the angular velocity of the ball about the elbow joint is 30.3 rad / s and the ball is 1.35 m from the elbow joint, what is the velocity of the ball?
*October 5, 2015*

**physics**

Only two forces act on an object (mass=4.41 kg), as in the drawing. Find (a) the magnitude and (b) the direction (relative to the x axis) of the acceleration of the object.
*October 1, 2015*

**physics**

Two forces A and B are applied to an object whose mass is 12.3 kg. The larger force is A . When both forces point due east, the object's acceleration has a magnitude of 0.443 m/s2. However, when A points due east and B points due west, the acceleration is 0.280 m/s2, due ...
*October 1, 2015*

**math**

Assume you have a basket full of socks, which have the following properties: 6 of the socks have blue stripes 8 of the socks have red polka dots 16 of the socks have blue polka dots 10 of the socks have red stripes (a). If you take one sock out of the basket, what is the ...
*September 24, 2015*

**math**

A student takes a multiple choice quiz with 12 questions and 5 alternatives per question. Unfortunately, this student has no idea what any of the answers are, so he randomly selects an alternative for each question on the exam. Using this “blind guessing” strategy, ...
*September 24, 2015*

**Math **

The radius of a sphere is 3 cm . the radius is increased by a linear scale factor of 5:2 . calculate the surface area of the new sphere
*September 22, 2015*

**Chemistry**

a 7.83g sample of hydrocyanic acid contains 0.290g and 4.06g of nitrogen. Find the mass of carbonin a sample of HCN with a mass of 3.37g.
*September 13, 2015*

**physics**

A cannon is mounted on a tower above a wide, level field. The barrel of the cannon is 20 m above the ground below. A cannonball is fired horizontally with an initial speed of 900 m/s. Assuming air resistance can be neglected, approximately how long will the cannonball be in ...
*September 9, 2015*

**Physics**

An initially motionless test car is accelerated uniformly to 135 km/h in 8.08 seconds before striking a simulated deer. The car is in contact with the faux fawn for 0.695 seconds, after which the car is measured to be traveling at 87.5 km/h. What is the magnitude of the ...
*September 8, 2015*

**Chemistry**

A 2.20 g-sample of a compound containing carbon, hydrogen, and oxygen is burned and it produces 4.61 g CO2 and 0.94 g H2O. What is the empirical formula of this compound? (i.e., C2H4O) I found the mass of Carbon (4.61/44g)*(1 mol C/1 mol CO2)=.1047 I found the mass of Hydrogen...
*September 8, 2015*

**physics**

An unsuspecting bird is coasting along in an easterly direction at 4.00 mph when a strong wind from the south imparts a constant acceleration of 0.300 m/s2. If the acceleration from the wind lasts for 2.70 s, find the magnitude, r, and direction, θ, of the bird\'s ...
*September 8, 2015*

**physics**

35 m
*September 8, 2015*

**physics**

On the Moon, the acceleration due to gravity is 1.62 m/s^2. How far would a 19 g rock fall from rest in 6.5 seconds if the only force acting on it was the gravitational force due to the Moon?
*September 8, 2015*

**Chemistry**

A 2.20 g-sample of a compound containing carbon, hydrogen, and oxygen is burned and it produces 4.61 g CO2 and 0.94 g H2O. What is the empirical formula of this compound?
*September 7, 2015*

**physics**

You throw a baseball directly upward at time t = 0 at an initial speed of 13.3 m/s. What is the maximum height the ball reaches above where it leaves your hand? At what times does the ball pass through half the maximum height? Ignore air resistance and take g = 9.80 m/s2.
*September 7, 2015*

**physics**

12.06 for speed 2.01 for time
*September 7, 2015*

**physics**

While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 7.65 m/s. The stone subsequently falls to the ground, which is 11.1 m below the point where the stone leaves your hand. At what speed does the stone impact the ground? How ...
*September 7, 2015*

**Math**

How do I solve for the limit of ((x^500)-1)/(x-1)?
*September 2, 2015*

**Math**

How do I find the vertical asymptote of f(x) ={x^4}/{x^2 + 8}?
*September 2, 2015*

**Math**

Nevermind I found the answer by graphing
*August 31, 2015*

**Math**

The definition of the derivative, applied to f(x) = 7^x, results in the formula f'(x) = k \cdot 7^x where k = lim of ((7^h-1)/(h) h approaches 0 The value of the constant k cannot be determined using the usual tricks for evaluating limits. Using your calculator, ...
*August 31, 2015*

**Science**

What elements have the highest ionization energy and why?
*August 30, 2015*

**Chemistry**

How many atoms are present in 0.3333 mol of CO2? I know I need to use the conversion factor of 6.021x10^23 but do I just multiply that times .3333? =2.007?
*August 30, 2015*

**Chemistry**

The mineral cassiterite is a compound of tin and oxygen. Chemical analysis of cassiterite shows that the mass percentages of tin, Sn, and oxygen, O, are 78.8% and 21.2%, respectively. Determine the formula of this compound. I found the molar mass and correct equation SnO4. Sn-...
*August 30, 2015*

**Chemistry**

A compound is found to contain 50.05 % sulfur and 49.95 % oxygen by mass. What is the simplest (empirical) formula for this compound? They said to assume that it is 100 grams. I found the molar mass. S- 32.06 0-16.00 But now I don't know what to do. Please help. Thank you!
*August 27, 2015*

**math**

2/5-2/15+3/10
*August 26, 2015*

**Chemistry**

What is a good website to practice limiting reagent problems?
*August 25, 2015*

**Math **

what is a good website to practice limits?
*August 25, 2015*

**Math**

How do I know if a graph has removable continuity, jump, or infinite? What is the difference?
*August 19, 2015*

**Science**

The combustion of a compound which contains only C and H yields 2.58 g of CO2 and 0.53 g of H2O. What is the empirical formula of the compound? Molar mass of CO2= 44.01 Molar mass of H20= 18.01 2.58g/44.01=0.586 mol CO2 .53g/18.01=.0294 mol H2O I Don't know where I went ...
*August 19, 2015*

**math**

A room is 12 feet long and 10.5 feet wide. A scale model of the room is 3.5 feet wide. What is the area of the scale model? 10.3 square feet 14 square feet 36 square feet 122.5 square feet
*July 20, 2015*

**Geometry **

If mADC = 7x+3 and mDCB = 5x+9, then mDAB = ?
*May 14, 2015*

**SOLVE -MATH**

A physics exam consists of 9 multiple choice questions and 6 open-ended problems in which all work must be shown.If an examinee must answer 6 of the multiple- choice questions and 3 of the open-ended problems, in how many ways can the questions and problems be chosen?
*April 30, 2015*

**Algebra 2/Statistics**

From a squad of 12 cheerleaders, 10 will assemble themselves into a 4-level pyramid at the Homecoming rally. 1.) How many different combinations of cheerleaders can be used to build the pyramid? For this I got 12C10=66......Right or Wrong? 2.) The coach decides that Alexis ...
*April 30, 2015*

**Algebra 2/statistics**

On a fair 6-sided die, each number has an equal probability p of being rolled. when a fair die is rolled n times, the most likely outcome (the mean) is that each number will be rolled NP times, with a standard deviation of sqrt NP(1-P). Brandon rolls a die 200 times. He will ...
*April 30, 2015*

**maths**

One number is greater than another by 4, their sum is 32. What are the two numbers? Write a function which could solve this for any two numbers (x and y) with any difference between them.
*April 20, 2015*

**Science**

Actually that's perfect. Haha Thank You Rykr :D
*April 2, 2015*

**Science**

What is the effect of the slope of an incline of a surface on an object’s speed?” PLEASE do not answer...I just need help understanding it. Thank You
*April 2, 2015*

**Math**

How do you find the surface area of a triangular prism?
*March 24, 2015*

**excel**

what formula would be used to calculate the calories from fat for food items which is equal to the grams of fat multiplied by 9
*March 19, 2015*

**Math**

The opposite sides of a square, a rectangle, a parallelogram, and a rhombus are what type of triangle?
*March 17, 2015*

**biology**

Hello, I am having trouble with a question on my homework. Even after reading through my notes and textbook I am still not sure what the answer is. I think the answer is the new paramecium is able to reproduce sexually and asexually.Here is the question: After sexual ...
*March 15, 2015*

**calculus**

If 3x^2 + y^2 = 7 then evaluate the second derivative of y with respect to x when x = 1 and y = 2. Round your answer to 2 decimal places.
*March 10, 2015*

**Accounting**

On December 31, 2013, Ruby Inc. issued 3,000 $1,000 par value bonds with a stated rate of 6% and a 10-year maturity. Interest is payable semiannually on June 30 and December 31.
*March 8, 2015*

**Calculus 2**

Let a thing rod of length a have a density distribution function p(x)+10e^(-.1x), where x is measured in cm and p in grams per centimeter. A) if the mass of the rod is 30 g, what is the value of a? B) For the 30g rod, will the center of mass lie at its midpoint, to the left, ...
*February 23, 2015*

**Physics**

A certain force gives mass m1 an acceleration of 13.0 m/s2 and mass m2 an acceleration of 3.6 m/s2. 1) What acceleration would the force give to an object with a mass of (m2-m1)? 2) A certain force gives mass m1 an acceleration of 13.0 m/s2 and mass m2 an acceleration of 3.6 m...
*February 21, 2015*

**Physics**

A 5.0- kg concrete block rests on a level table. A 3.7- kg mass is attached to the block by a string passing over a light, frictionless pulley. If the acceleration of the block is measured to be 1.0 m/s2, what is the coefficient of friction between the block and the table?
*February 21, 2015*

**Physics**

Two boxes, A and B, are connected to each end of a light vertical rope. A constant upward force 90.0N is applied to box A. Starting from rest, box B descends 11.0m in 3.50s . The tension in the rope connecting the two boxes is 30.0N a) What is the mass of box A? b) What is the...
*February 17, 2015*

**AP European History**

How did medieval Europe lay the groundwork for the rebirth of Europe (Renaissance)? What conditions existed that allowed Europe to evolve out of medieval conditions?
*February 11, 2015*

**Physics**

Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 68.5 N, Jill pulls with 61.3 N in the northeast direction, and Jane pulls to the southeast with 111 N. (Since the donkey is involved with such uncoordinated people, who can blame it for ...
*January 31, 2015*

**Math**

Leena bakes a loaf of bread. She eats 1/8 loaf of bread and give 1/6 of it each of her 3 friends. What fraction of the loaf of bread is left?
*January 27, 2015*

**health**

It's considered to be an advantage to have lungs with increased capacity, because with increased capacity A. anaerobic exercise is easier. B. the lungs can better exchange oxygen and waste products in the blood. C. the chest looks more "buff." D. the lungs will ...
*December 28, 2014*

**english**

During the long afternoon, Daryl searched for his car keys. He searched under the bed, beneath the sofa cushions, and emptied his jacket pockets. soryy..
*December 14, 2014*

**english**

Which one of the following words is not an object of a preposition? A. afternoon B. cushions C. pockets D. bed c?
*December 14, 2014*

**english**

Which one of the following words represents an object of a preposition? A. afternoon B. Daryl C. sofa D. trouser b?
*December 14, 2014*

**English**

(1) Brenda would have liked to have taken her vacation at the beach. (2) However, the weather forecast on the television called for rain. (3) Also, her fiancé, Max, wanted to vacation in the mountains. (4) After a heated discussion, Brenda and Max decided to compromise...
*December 14, 2014*

**English**

Thanks :P
*December 14, 2014*

**English**

In which one of these sentences does an adverb modify a verb? A. Lucy quickly hid behind the tree. B. The dress was terribly old. C. Jacob was a very smart boy. D. Mr. Dodge moved in an extremely slow manner. I think it's A?
*December 14, 2014*

**History**

Two methods used to control annual floods were ______________
*December 11, 2014*

**math**

12 3/4 feet long by 11 1/2 feet wide is how many square feet
*December 8, 2014*

**math h**

Darcy, Jason and Maria share $268. Jason has $20 more than Darcy and Maria has twice as much money as Jason. How much money do Darcy and Jason have altogether?
*November 19, 2014*

**math **

Gerry had a total of 30 pens and pencils. He decided to trade with his friends all of his pens and pencils. If he traded every pen for 2 pencils, he would have 48 pencils in all. How many pens and how many pencils did he have before the trade?
*November 19, 2014*

**math **

Juan and rachel have the same number of marbles. Rachel gives away 10 marbles and Juan gives away 22 marbles. Rachel then has 3 times as many marbles as Juan. How many marbles did each of them have at first
*November 19, 2014*

**math **

Add the hundredths. 4 hundredths + 7 hundredths = ____ hundredths. Regroup the hundredths.
*November 17, 2014*

**Chemistry**

What is the minimum amount of 6.0M H2SO4 necessary to produce 19.0g of H2(g) according to the reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g)
*November 14, 2014*

**math **

Mr. Sims has 198 oranges. he packs them into 5 crates. Use rounding to estimate the number of oranges in each crate.
*November 12, 2014*

**math**

A basket with 12 apples has a mass of 3105 grams. The same basket with 7 apples has a mass of 1980 grams. Each apple has the same mass. What is the mass of the basket?
*November 12, 2014*

**math**

Sally and Marta had the same number of postcards. After Sally sold 18 of her postcards, Marta had 4 times as many postcards as Sally. How many postcards did each girl have to begin with?
*November 12, 2014*

**Chemistry**

2 moles of ideal gas at 300K, initial volume 25 L, are compressed under an external pressure at 3600 torr. Assuming the temp and the internal energy of gas do not change, what is the entropy change of the gas? (Assume the heat flow is reversible)
*November 4, 2014*

**java programming**

Create a java program that will calculate the current grade in a classroom. The program should ask for 5 grades as well as total point value per grade available.
*November 3, 2014*

**computer science**

I would like to create a class for finding the voltages of 1, 2 or even 4 batteries. The Class can be called BatteryVoltage with a default voltage value of 1.5 (AA Battery) Must allow the user to find the total voltage of batteries when installed as a single,double, or ...
*October 28, 2014*

**Java**

I would like to create a class for finding the voltages of 1, 2 or even 4 batteries. The Class can be called BatteryVoltage with a default voltage value of 1.5 (AA Battery) Must allow the user to find the total voltage of batteries when installed as a single,double, or ...
*October 28, 2014*

**math**

A sticker is 1.2 cm wide how many stickers will fit edge to edge on a strip of paper that is 108 Centimeters long
*October 28, 2014*

**Physics**

A 2.32 kg block slide down a ramp from a height of 4.19 m. The block has a speed of 3.25 m/s when it reaches the bottom. There is friction. What is the work (in J) done by gravity? What is the work done by friction? I found the work of friction already. KE= .5m(v^2) KE= .5(2....
*October 27, 2014*

**Java**

NEED HELP! I would like to create a class for finding the voltages of 1, 2 or even 4 batteries. The Class can be called BatteryVoltage with a default voltage value of 1.5 (AA Battery) Must allow the user to find the total voltage of batteries when installed as a single,double...
*October 26, 2014*

**JAVA PROGRAMMING**

NEED HELP! I would like to create a class for finding the voltages of 1, 2 or even 4 batteries. The Class can be called BatteryVoltage with a default voltage value of 1.5 (AA Battery) Must allow the user to find the total voltage of batteries when installed as a single,double...
*October 25, 2014*

**physics**

In a game of shuffleboard, a disk with an initial speed travels of 3.2m/s travels 6.0m (a) what is the acceleration of the disk? (b) what is the coefficient of friction between the floor and the disk? So far I've gotten to the equation vf^2 - vi^2 = 2a(xf-xi) because time ...
*October 19, 2014*

**Algebra**

Algrbra evaluate each expression when n = 75 12n 36n 28n 56n 87n is that mutiplication?
*October 8, 2014*

**algb**

We must be taking the same class but different levels. I do not know a Devian or Amber.
*October 1, 2014*

**math**

I do not know Devian or Amber?
*October 1, 2014*

**Math-G7 Help please**

Write a system of equations to match each of these problems. Then solve the equations using the method... Substitution, or linear combinations. _____________________________________ 1. Dan is 4 years older than his brother Gabriel. Together their ages equal 22. How old is ...
*October 1, 2014*

**Math! URGENT**

i calculate one solution through -2(x-1) = 2x-2 expand the brackets giving you 2x-2 -2(x) makes 2x then -1 x -2 = -2 add the equation together gives you 2x-2
*September 25, 2014*

**physics**

a trolley of mass 40kg us pushed up a hill of height 10m at an angle of 20 degree. calculate the force required to reach this height. how do i complete this question?
*September 25, 2014*

**Science**

1.590
*September 23, 2014*

**vocabulary **

the animals in the drought area traveled for many miles to reach a body of water where they could blank their thirst
*September 22, 2014*

**math**

Each of their six water bottles holds 8 gallons. How many gallons of water did they take?
*September 21, 2014*

**science**

Yes mam
*September 18, 2014*

**science**

Can there be 2 full moons?
*September 18, 2014*

**programming**

Could you give me an idea of how to do this? I'm lost
*September 12, 2014*

**programming**

create a program using java that calculates the current grade in a classroom. the program should ask for 5 grades as well as the total point value per grade available.
*September 12, 2014*

**JAVA PROGRAMMING **

Create a java program that will calculate the current grade in a classroom. The program should ask for 5 grades as well as total point value per grade available.
*September 12, 2014*

**AP English 11**

Can "as if" be used in a simile similarly to the singular "as" or "like"? Would this example be considered a simile comparing children's eligibility to have recess compared to a carrot impending over head: "As if physical activity were a ...
*August 31, 2014*

**AP English 11**

I have researched each term repeatedly and have a simple understanding of the meaning of each term, however, I am still not comfortable with my answers. Are the following sentences either paradox, parallelism, oxymoron, or juxtaposition. 1. "She liked to be with people, ...
*August 31, 2014*

**English 11 AP**

I have researched each term repeatedly and have a simple understanding of the meaning of each term, however, I am still not comfortable with my answers. Are the following sentences either paradox, parallelism, oxymoron, or juxtaposition. 1. "She liked to be with people, ...
*August 31, 2014*

**English 11 AP**

Are you indicating that the following sentence is a simile? The comparison would be children's eligibility to have recess to a carrot dangling over someone who is attempting to grasp it.
*August 31, 2014*

**English 11 AP**

Can "as if" be used in a simile similarly to the singular "as" or "like"? For example: "As if physical activity were a carrot to dangle as a reward or yank away as a punishment."
*August 31, 2014*

**English**

I believe that the following is an example of parallelism, am I correct? "They made friends. They ran free."
*August 31, 2014*