Monday

July 28, 2014

July 28, 2014

Total # Posts: 244

**Physics**

It says top of the ball, so you need to minus both of the heights by 8cm. h1 = 0.8 -0.08 = 0.72 It is given that kinetic energy before striking the surface is 0.75 J. So you just nid to use potential energy formula(mgh) to calculate the mass of the ball . h2 = 0.45 - 0.08 = 0....

**Math**

Oh I see what I did yes I got 256 thank you

**Math**

448*

**Math**

Thank you. but how did you get 256? I tried plugging it back into the original h(4)=-16t+128t but I got 446

**Math**

Two kids are building a rocket for science class. once the rocket is launched its height in feet, h(t) can be found using the function h(t)=-16t^2+128t where t represents time in seconds. They record the time from the moment the rocket launches until it falls to the ground. (I...

**Chemistry**

1)(750psi)(625cm3)/293k=(v)(750psi)/193k

**Chemistry**

519 cm3 and 775 torr?

**Chemistry**

Help please? 1)A sample of propane gas occupies 625 cm3 at 20.0 °C and 750 torr. What is the final volume in cubic centimeters at -80.0 °C and 750 torr? 2)If oxygen gas is collected over water at 25 °C and 775 torr, what is the partial pressure of the O2? The vapor...

**chemistry**

How would I figure out the pressure?

**chemistry**

If 1.50mol of oxygen gas exerts a pressure of 1500mmHg at 20∘C, what is the volume in liters?

**physics**

An infinitely long thin metal strip of width w=12cm carries a current of I=10A that is uniformly distributed across its cross section. What is the magnetic field at point P a distance a=3cm above the center of the strip as shown? This one requires some integration! I suggest y...

**chemistry **

PLS HELP ME AND THANK YOU:) What is the molarity if 2.18 grams of CO(NO3)2.6H2O dissolved in 50.00ml of solution?

**Math**

A shirt is on sale for 40% off. The sale price is $12. What was the original price? What was the amount of the discount?

**Math (help)**

Nikki made 2 gallons of punch with fruit juice and ginger ale. The recipe requires 1 gallons of ginger ale. What percent of the total recipe is fruit juice? A- 50% B- 33 1/3% C- 25% D- 10% I got 50% because u need 1/2 more but the answer is 25 please explain

**physics **

The Achilles tendon is attached to the rear of the foot as shown in (Figure 1) . A person elevates himself just barely off the floor on the "ball of one foot." Assume the person has a mass of 80kg and D is twice as long as d.Find the tension FT in the Achilles tendon...

**math;)**

a kitchen is shaped like a rectangle with dimensions of 11 1/2 ft. by 9 1/2 ft. the floor of the room is made of square tiles with a side length of 1.2 ft. What is the number of tiles that will cover the kitchen floor?

**MATH?!!?**

where did you get 1.4 and .75? please explain.

**math**

is 4x4=16

**Algebra**

A boat can go 20 miles against a current in the same times that it can go 60 miles with the current. The current is 4 miles per hour. Find the speed of the boat with no current.

**Algebra 1**

22x+70=17x-95

**Algebra 1**

8x+2x=15x-10

**ENGLISH STORY **

What i the story of the last butterfly ?

**Math**

Rachel spend $1.20 on her drink. She has now 1/3 of the amount of money that she had before she bought the drink. How much money did she have before she bought a drink?

**Chemistry**

Would the VSEPR notation of CH3Cl be AX4?

**chemistry**

what would the volume of the gas produced be at a pressure of 700mmHg and a temperature of 30degrees of C

**chemistry**

hydrogen gas can be produced by reacting aluminum with sulfuric acid .How many L hydrogen gas are produced by reacting 15.0 mol of sulfuric acid with 15.0 mol of aluminum at STP?

**math**

A sphere and cone have equal radii and equal volume. Find the relation between the radius and the height of the cone

**aig math**

When 306 stamps were shared among Pat, Kyle, and Ryan, Pat got twice as many stamps as what Kyle and Ryan got together. If Kyle got 18 stamps more than Ryan, how many stamps did Ryan get? Don't forget to show your work.

**AIG MATH**

i posted it again

**aig math**

A bookshop had 60 boxes of pencils. Each box contained 85 pencils. Half of the pencils were packed into packets of 25 pencils and the rest were packed into packets of 20. How many packets of pencils were there altogether? My answer is 229 am i right? How many pencils were left...

**math**

Mia gave 1/3 of her 24 marbles to david. how many did daviv get? I said 8

**chemistry**

mass of the metal 7.26g volume of water in the calorimeter 10mL initial temp of water in calorimeter 21.5 degrees C initial temp of metal 95.5 d C final temp in mixture in calorimeter 23.8 D C question: calculate the energy lost by the metal taking into consideration that it i...

**math**

Peter has twice many stickers as Ali. Ali has 40 more stickers than Carlos. They have 300 stickers altogether. How many stickers does Peter have?

**chemistry**

Silicon carbide is one of the hardest materials known. It is often known commercially as carborundum. Silicon carbide is used primarily as an abrasive for sandpaper and is manufactured by heating common sand (silicon dioxide, SiO2) with carbon. - What mass of SiC should result...

**chemistry**

2KI+Pb(NO3)2=2KNO3+PbI2 suppose a solution containing 1.25g of KI is combined with a solution containing 2.42g Pb(NO3)2 _what mass of the yellow PbI would result what is the limiting reactant How much in grams of the excess reactant was used how much in grams of the excess rea...

**AIG MATH**

A fruit seller has an equal number of apples and oranges.He sold 109 oranges and 45 apples.The number of apples left is 5 times the number of oranges left.What is the total number of fruit he had at first?

**math**

A fruit seller has an equal number of apples and oranges. He sold 109 oranges and 45 apples.The number of apples left is 5 times the number of oranges left. What is the total number of fruit he had first?

**Calculus**

Determine the line through which the planes in each pair intersect. a) 3x+2y+5z=4 4x-3y+z=-1

**aig math(Ms.Sue)**

Both Todd and Zack earn the same salary. Todd spent $716 and Zack spent $128. Then Zack had 4 times the amount of money Todd had left. How much is their salary? Please tell me how and what your answer is?

**aig math**

Fill in the missing sign to make the equation true. 125 _ 5 _ 12 _ 2 = 1

**social studies**

what are advantages and disadvantages of dynastic rule in ancient Egypt

**chemistry**

mass of evaporating dish 22.34 mass of evaporating dish +hydrate 24.64 mass of evaporating dish +anhydrous salt 23.85 CuS04XH2O=CuSO4+XH2O 1.determine the mass of the water lost 2.determine the number of moles of the water lost

**math**

thanks Ms. Sue

**math**

Nina can make 8 glasses of juice drink from one can of juice. If she will have 35 visitors, how many cans of juice should she buy?

**english**

the chimney sweeper poem the children were very badly treated by masters who only cared about money. discuss the methods you would use to protest

**aig math**

please show your work

**aig math**

Jenny,Bob and Paul share a sum of money. Jenny received 2/5 of the money, Bob received 1/4 of the money and Paul received the rest of the money. If Paul received $1.50 more than Bob, how much more money did Jenny receive than Paul.

**AIG MATH**

The weight of Meg's dog is 2 1/2 times more than that of her cat. If both animals weight 42 lbs, find the weight of each animal?Please show your work.

**science**

Most of the eastern United States and the West Coast have a climate that is- F)mountain H)desert G)polar J)temperate My answer is temperate, am i right if not please tell me why?

**science**

Sandy walked to school this morning because it was nice and warm outside.When school let out, a cold front was moving through. What was the weather most likely as she walked home? A)warmer C)the same B)cooler D)it is unpredictable my answer is A),am i right if not please tell ...

**EOG science**

Okay i took some time studying the question is the answer C)?

**EOG science**

is the answer A)?

**EOG science**

Javier lives on the west coast of the U.S near San Francisco. What are the temperatures most likely like where he lives? A)the temperature is always hot. B)the temperature is always below freezing. C)the temperature is moderate and doesn't change much. D)the temperature fl...

**Chemistry**

Please do not answer this question until after 5pm. Thank you.

**Chemistry**

A buffer was prepared by dissolving 22.61g of NaCLO2 into 0.100L of 4.00M aqueous HCLO2. Calculate the pH of the original Chlorous acid/chlorite ion buffer. Ka= 1.1 x 10^-2.

**Math**

You decide to make a scale drawing of your bedroom. YOur bedroom measures 12 ft. wide by 20 ft. long. If you are using an 8.5" x 11" paper, whate scale will you use. Explain.

**Chemistry**

What is the pH of a 0.350M HBrO Solution? HBrO, Ka=2.3 x 10^-9

**science**

what will cold air moving over a warm body of water create? A)a rain shadow affect B)lake effect snow C)an urban heat island D)higher temp. My answer is B, am i right of not please tell me your answer

**aig math**

David has 120 stamps. He gave 36 stamps to Maria and some to Alice. After that he had 5/8 of the stamps left. How many stamps did he give to Alice? My answer is 9, am i right if not please tell me why and how you got your answer.

**aig **

Please solve. Use order of operations. 320-(17+3)-5 = My answer is 323, am i right or not? if not please tell me your answer and how you got it.

**science**

what does low pressure over land and high pressure over water form? A)a sea breeze C)global wind B)a land breeze D)a front My answer is A), am i right? if not please tell me why and your answer.

**Math**

The Height of a ski jumper, 'h' in meters is given by the equation h=-4.9t^(2)+0.5vt+8 where 't' is measured in seconds after leaping from the ramp and 'v' is his/her speed at the time of the jump. a)If the jumpers' maximum height is reached is 16 m...

**math(please help)**

Allison, Ashley, and Becky weigh 124 kg altogether. Allison and Becky weigh 102 kg altogether. Allison and Ashley weigh 86 kg altogether. How much does each person weigh? please show your work.

**science(please help)**

Which of the following has the greatest effect on the formation of rain or snow? A)cloud cover C)air pressure B)humidity D)temperature My answer is C) am i right, if not please tell me what you got.

**math**

20.46 * 4 = 81.86 Round the answer to 1 decimal place what is the answer? My answer is 81.8 if not please tell me why and how?

**algebra**

You may ignore this question, i think i figured it out.

**algebra**

If you could please help show me the steps so i can continue on with my assignment i would be very appreciative: Problem 9 - p/4 = 5

**physics**

A peregrine falcon dives at a pigeon. The falcon starts downward from rest with free-fall acceleration. If the pigeon is 53.0 m below the initial position of the falcon, how long does the falcon take to reach the pigeon? Assume that the pigeon remains at rest.

**Economics**

Classical macroeconomics theory concludes that ultimately A. Fiscal policy generates only quantity effects B. erratic investment causes long business cycles C. Functional finance cures excessive budget deficits D. Natural state of the economy is at full employment

**Economics**

An increase in the amount of money circulating in the econmomy, ceterics pair bus will result in which of the following A. Demand side inflation B. supply side deflation C. Supply side inflation D. Demand side deflation

**Economics**

According to the aggregate expenditure function, as the price level decreases, it is reasonable to expect that A the automonos and induced expenditures increase B only the autonomous expenditures increase C only hie induced expenditures decrese C. The autonomous and induced e...

**Physics**

100 degree celcius because melting point of water is 100 degree celcius

**Maths**

Thanks

**Maths**

Express 175.0cm3 in litres (dm3)

**Chemistry**

1?

**Chemistry**

How many cm3 are there in 1.0 litre?

**British Literature 2**

In Rosencrantz and Guildenstern are Dead, how do other characters define isolation (compared to Rosencrantz and Guildenstern) and how does it effect their actions? For example, how does Hamlet's sense of isolation from the court differ from the isolation the Player feels w...

**British Literature**

In Rosencrantz and Guildenstern are Dead, Guil and Ros constantly seem like outsiders in the play. Why are they so alienated from the rest of the cast? What factors lead to their isolation?

**chemistry**

Calculate the minimum number of moles of Pb(NO3)2 required to start precipitation in 50.0mL of 0.15M ZnI2

**chemistry**

Calculate the minimum number of moles of Pb(NO3)2 required to start precipitation in 50.0mL of 0.15M ZnI2

**Algebra**

y=x^2-3x-10, Find the y-intercept and any x-intercept

**Biology **

How did Watson and crick's model explain why their are equal amounts of thymine and adenine in DNA?

**MAT 116**

Find the slope-intercept equation of the line that has the given characteristics. Slope 8.7 and y-intercept (0,-6)

**Math Problem Solving**

I am so lost, please help. The length of a rectangle is x inches and its width is 4 inches more than two thirds of its length. What is the perimeter of the rectangle in inches?

**Algebra**

the length of a rectangle is x inches and its width is 4 inches more than two thirds of its length. What is the perimeter of the rectangle in inches?

**math**

150 * 41 = 6150

**mathh**

22x-1+5=15 22x+4=15 22x=15-4 22x=11 22x/22=11/22 x=1/2 check: 22(1/2)-1+5=15 11-1+5=15 10+5=15 15=15

**algebra**

what are the x and y intersepts of the equation 50x+ 20y= 20,000

**physics**

A rubber band of relaxed length 6.3 cm stretches to 10.2 cm under a force of 1.0 N, and to 16.5 cm under a force of 2.0 N. Does this rubber band obey Hooke's Law?

**Science**

A crate of mass 2000 kg is hanging from a crane at the end of a cable 12 m long. If we attach a horizontal rope to this crate and gradually apply a pull of 1800 N, what angle will the cable finally make with the vertical?

**math**

a bird is a type of animal, you idiot.

**grammar**

the answer is number 3

**English----Novel**

I am looking for a novel that's set in the 1980--1999 in Zimbabwe. Any recommendation is appreciated.

**stat**

Musical styles other than rock and pop are becoming more popular. A survey of college students finds that 34% like country music, 32% like gospel music, and 12% like both. What is the conditional probability (±0.01) that a student likes gospel music, given that he or sh...

**Stat**

An instant lottery game gives you probability 0.02 of winning on any one play. Plays are independent of each other. If you play 4 times, the probability (±0.0001) that you win on none of your plays is about

**calculus**

how do you separate these variables dy/dx=4sqrt(y)lnx/x, y(e)=9

**separation of variables**

how do you separate these variables dy/dx=1/y^2, y(0)=4

**Physics**

Suppose a cube that measures 0.020 m on each side were made of water. Find its volume, mass, and weight.

**physics**

You take your backpack out of the car, hike to the top of a nearby mountain, and return with your backpack to your car at the bottom. Have you changed the amount of your backpack's mechanical energy?

**algebra**

What is the midpoint of the line segment connecting the points (2,- 3)and (4,9)?