Thursday

April 24, 2014

April 24, 2014

Total # Posts: 473

**pyhsics**

A cannonball is shot (from ground level) with an initial horizontal velocity of 36.0 m/s and an initial vertical velocity of 21.0 m/s. 1) What is the initial speed of the cannonball? 2) What is the initial angle θ of the cannonball with respect to the ground? 3) What is t...

**physics**

A red ball is thrown down with an initial speed of 1.2 m/s from a height of 25.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 22.9 m/s, from a height of 0.8 meters above the ground. The force of ...

**college**

A blue ball is thrown upward with an initial speed of 19.8 m/s, from a height of 0.5 meters above the ground. 2.4 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 7.9 m/s from a height of 22.5 meters above the ground. The force of grav...

**maths**

in a boy's school,5/8 of the boys play football and 4/7 play rugby.if every boy play atleast one of the two games,ind the fraction of the boys who play both ?

**English**

A

**bond**

Assume an investor with 5 years investment horizon is considering purchasing a 7 years 6% coupon selling at par. The investor expects to reinvest the coupon at 5% and that the bond will be selling to offer a yield to maturity of 4% in five years. What is the expect total retur...

**physical science**

A train sounding its horn is approaching an observer. The pitch of the horn's sound relative to its normal pitch is???

**KSU**

At 3 P.M, ship A is 150 km west of ship B. Ship A is sailing east at 35 km/h and ship B is sailing north at 25 km/h. How fast is the distance between the ships changing at 7 P.M.? (Round your answer to one decimal place.)

**Math**

Thank You

**Math**

11+2*(6+11)

**Chemistry**

In the following experiment, a coffee-cup calorimeter containing 100 \rm mL of \rm H_2O is used. The initial temperature of the calorimeter is 23.0 \rm ^{\circ}C. If 9.80 g of \rm CaCl_2 is added to the calorimeter, what will be the final temperature of the solution in the cal...

**Biology**

Which of the following are three common characteristics of echinoderms? A tube feet, circulatory system, body symmetry B marine-dwellers, endoskeletons, water-vascular system C bilateral symmetry, ossicles, respiratory system D mouths, protosomes, body symmetry is it C? ------...

**geography**

Southwest Asia can best be characterized as A) an area with few resources. B) a desert with an arid and semiarid climate. C) a region of forests. D) an area of forests and grasslands. I think it's B, just checking! thanks in advance

**business**

Is the correct answer D?

**Physiology**

if someone is infected with the common cold virus, which type of nonspecific immune response would attempt to deal with the invader? A) T cells B) b cells C) antibodies D) none of these

**Math**

how do you subtract hundreds?

**Chemistry**

1.) What are the equilibrium partial pressures of CO and CO2 if co is the gas present initially, at a partial pressure of .912 atm. Kp = 19.9 Fe2O3 + 3CO <--> 2Fe + 3CO2 I'm trying to find partial pressure of both CO and CO2 by calculating for "x" in the eq...

**statistics**

a set of maths exame score mean is 70 and variance is 8. a set of english score has mean is 74 and variance is 16. for which exame whould a score of x=78 have a higher standing?

**calcalus**

Water is leaking out of an inverted conical tank at a rate of 12200 cubic centimeters per minute at the same time that water is being pumped into the tank at a constant rate. The tank has height 15 meters and the diameter at the top is 65 meters. If the water level is rising a...

**Chemistry**

KMno4+NaHso3

**physics**

A 40N force applied at an angle of 37 degrees above the horizontal pulls a 5kg box on a horizontal floor. the acceleration of the box is 3meter per second square. how large a frictional force must be retarding the motion of the box. a.50N b.13N c.17N d.25N

**physics**

a 2kg and a 4kg hang freely at opposite end of a light in-extensible string which passes over a small and light pulley fixed to a rigid support.calculate the acceleration of the system. a.3.3M/S square b.2.67m/s square c.4.41m/s square d.2.67m/s square.

**physics**

a 2kg and a 4kg hang freely at opposite end of a light in-extensible string which passes over a small and light pulley fixed to a rigid support.calculate the acceleration of the system.

**Thermodynamics**

Suppose an enzyme lowers the activation energy by an order of magnitude. What is the ratio of catalyzed rate to the uncatalyzed rate at at 25 °C? at 37 °C?

**Honors Chemistry**

1. 5 2. 1.0 x 10^-5 3. 2.5 4. 12 5. 1.26 x 10^-9

**math**

The perimeter of a rectangular pool is 84 feet. The width of the pool is half the length. What are the measurements of the rectangular pool?

**trig**

if cot(x-10)=tan(4x) what does x equal?

**chemistry**

how do you do electron dot diagrams?

**Math**

4*10=40 slices of bread. 18 ppl eat 2 slices each, making 36 eaten 36/40 slices were eaten

**Chemistry--Plz HELP!**

How would i go about balancing the following equation? My teacher said something about the charges: Silver Nitrate + Sodium Phosphate = Silver Phosphate + Sodium Nitrate

**Chemistry-Stoichiometry**

A 1.146 mixture of the solid salts Na2SO4 and Pb(No3)2 forms an aqueous solutionwith the precipitation of PbSO4. The precipitate was found to weigh 0.672g. The limiting reactant is Na2SO4. What is the percent by mass of each salt in the mixture?

**math 2nd grade**

simon ate 3/2 slices of an apple. Did he eat less than a whole apple or more than the whole apple. Draw a picture to show your answer

**Econnomics**

junanita has 6000 in a two year certificate of deposit (CD) money supply definitions

**MATH - area question **

I need help on where to begin with this problem. You are installing a new deck around your pool. The pool is rectangular with the dimensions 8m by 4m. The deck will surround the pool and will have a width by 2m. What is the area of the deck? I know that A=LxW and that the Area...

**Math (Area)**

I need help on where to begin with this problem. You are installing a new deck around your pool. The pool is rectangular with the dimensions 8m by 4m. The deck will surround the pool and will have a width by 2m. What is the area of the deck? I know that A=LxW and that the Area...

**math**

lisette drew a rectangle and divided it into fourths. She colored the whole rectangle. How many fourths were colored?

**math**

simon ate 3/2 slices of an apple. Did he eat less than a whole apple, the whole apple or more than a whole apple. Draw a picture to show the answer.

**MATH**

what addition fact can help you find 14-4? explain

**english**

what does this question mean?

**english**

also how does she describe her feelings as she waits for him?

**english**

ROMEO AND JULIET what are juliets feelings towards romeo in act 3 scene 2 from lines 1-35?

**chemistry**

Sketch one face of a simple cubic unit cell of side a for the case when the maximum fraction of the lattice in volume is filled with atoms, and each atom is approximated by a hard sphere. (ii) What is the radius of each atom in terms of a? (iii) What is the volume of each atom...

**engineering**

Sketch one face of a simple cubic unit cell of side a for the case when the maximum fraction of the lattice in volume is filled with atoms, and each atom is approximated by a hard sphere. (ii) What is the radius of each atom in terms of a? (iii) What is the volume of each atom...

**math**

for every 20 math books a school buys, they they get 7 aditional books for free. The school needs 297 math books. What is the total number of math books the school must buy in order to receive 297 math books in all?

**Dynamics**

A quarterback throws a football with a velocity vo at an angle of 45o with the horizontal. At the same instant a receiver standing 20 ft in front starts running down the field at 15 ft/s and catches the ball. What is the distance of the receiver from the quarterback when the b...

**math**

Thank You so much Ms. Sue,

**math**

3rd grade create an algorithm that has a difference of 20

**Math**

what is the scientific notation of 1,890,000

**physics**

A stone is launched straight up by a slingshot. Its initial speed is 20.1 m/s and the stone is 1.30 m above the ground when launched. Assume g = 9.80 m/s2. (a) How high above the ground does the stone rise? (b) How much time elapses before the stone hits the ground?

**calculus **

reverse the order of integration integration 1-e integration 0-lnx dy dx

**English**

ok thank you

**English**

I do not know I do think its situational though

**English**

Situational? I do not know I'm not very good at irony.

**English**

"Out of spite, the human being pretended not to believe that it was Snowball who had destroyed the windmill…The animals knew that this was not the case." What kind of Irony is this?, Situational,Dramatic, or Verbal

**Learning skills**

Explain the SQR3 OF READING.

**Learning skills**

What are the advantages of study reading?

**history**

Thanks again

**history**

How did the use of advanced technology make World War II the most devastating war in history?

**Science**

thank you sooooo much!

**Science**

Was Daniel Bernoulli for the atomic theory or against it and explain why?

**english**

can anyone help me with explicationg act 3 scene 1 (setting) (charcater) (plot) (theme) of macbeth?

**math**

The force F (in Newtons) required to move a box of mass m kg in motion by pulling on an attached rope is F(x) = f m g/(cos(x))+ f (sin(x)) where x is the angle between the rope and the horizontal, f is the coefficient of static friction and g = 9.8 m/s^2. Find the angle x that...

**Calculus**

The answer might be easy if you told us the minimum height requirement. Since the ceiling is cheaper, the lower the height, the cheaper it will be. Once we know that, the squarer the building, As equal as possible in length & width, the smaller the perimeter and therefore the ...

**Finance**

Trying to figure out how to do problems like these. So confused! 1. The receivables turnover for 2009 is 10 times. 2. All sales are on account. 3. The profit margin for 2009 is 14.5%. 4. Return on assets is 22% for 2009. 5. The current ratio on December 31, 2009, is 3.0. 6. Th...

**calculus**

Differentiate the function. h(x)= ln(x+ sqrt(x^2 -4))

**chemistry**

A student measures 0.2452 g of a monoprotic solid acid, and dissolves the solid in water to make 100.0 mL of solution. the entire solution is titrated to a phenolphthalein endpoint with 45.06mL of 0.1725M KOH. A. what is the molarity of the acid solution? B. what is the molar ...

**Calculator Help**

1. The csc^-1(1.23) I got 1.061 in radian mode 2. Cot^-1(-2.26) I got 0.8240 in radians 3. Cos^-1(-0.84) I got 2.568 Are these correct?

**Physics**

Sam, whose mass is 72.0 kg, takes off down a 51.0 m high, 11.0^\circ slope on his jet-powered skis. The skis have a thrust of 180 N. Sam's speed at the bottom is 43.0 {\rm m/s}. What is the coefficient of kinetic friction of his skis on snow?

**algebra **

Susie has a budget of $92 to spend on clothes. The shorts she wants to buy are on sale for $14 each. The shirts are on sale for $12 each. If Susie purchases four shorts, what is the maximum number of shirts she can buy to go with the shorts?

**science**

How much work does it take to raise a 3kg object 5m into the air? (a) What is the potential energy of the object when it is 5m in the air? (b) What does this tell you about the potential energy you get when you do work to lift an object? (c) If you drop the object, how fast is...

**reading strategies**

reading titles and headings,and trying to get an overview of what lies ahead in reading passageis called

**science**

A 4kg block is sitting on the floor. (a) How much potential energy does it have? (b) How much kinetic energy does it have? (c) The block is raised to 2m high. How much potential energy does it have? (d) The block is raised to 4m high. How much potential energy does it have? (e...

**physics**

as a baseball player strikes the ball with his batt the 1kg bat applies an average force of 250N on the .15kg baseball for .2 seconds. A) what is the force applied by the baseball on the bat? what is the acceleration of the baseball? C) what is the speed of the baseball at the...

**physics**

Standing on a balcony, you throw your keys to a friend standing on the ground below. 1.2 seconds after you release the keys, they have an instantaneous velocity of 15.4 m/s, directed 60° below the horizontal. What initial velocity did you give them?

**History**

what were 5 new weapons used in world war 1?

**calculus**

lim (9x^4+2x+1)^1/2/(3x^2+1) as x->-infinity

**physics **

A cube of aluminum is 4cm on each side.find the mass of the cube. (Density of aluminum is 2.7g/cm3

**math**

regroup 22: 2 tens, 2 ones; 1 ten, 12 ones Name the word that describes what was done to show the number in different ways.

**math**

write three number sentences where difference is 50.

**science**

Steel expands 1 part in 100 000 for each 1°C increase in temperature. If the 1.5km main span of steel suspension bridge had no expansion joints, how much longer would it be for a temperature increase of 20°C?

**chemistry**

194

**trig**

A space shuttle 200 miles above the earth is orbiting the. Earth once every 6 hours. how far does the shuttle travel in one hour? Note the radius of earth about 4000 miles.

**Math**

around 55% exactly .5472

**marketing**

For business marketing, we are planning to make and sell soap, with our target audience as teenagers. What do you think we need to do in order to attract lots of customers and for them to sell?

**science fair ideas**

thank you both!

**science fair ideas**

What are some really good/cool science fair ideas?

**physical science**

I talked too my teacher over the this morning and he said that his question is written correctly but after i tried to tell him thats what proves the plate tectonic theory he said that i needed to research it more and re-evaluate my answer

**physical science**

One observation that regards the magnetic stipes on the ocean floor that would disprove the theory of platetectonics would be?

**science**

please help!

**science**

One observation that regards the magnetic stipes on the ocean floor that would disprove the theory of platetectonics would be?

**alegbra**

it may be a division as a one is overtop so the posibility is that the answer may be 6.5

**math**

i am good at math i go to school every day i love school so much i love my teacher and my school is name is sonoran sky

**english **

sir explain me about question tags..?

**Biology**

What is the primary focus on all biological studies?

**math**

A furniture store receives an invoice dated Sept. 27 for 5 bedroom sets at $3,000 each. The invoice indicated a trade discount of 5/8/3. The seller of the furniture prepaid the freight of $200. Terms were 2/10 EOM. Assuming Mel pays on Nov. 2, what amount would be paid. (Be su...

**statistics**

You want to estimate the grades of st2%atistics students who gets grades of C or better. How many students should you survey to be 95% confident that the sample percentage is off by no more than 2 percentage points.

**world history**

How is the historical event of the 1981 Springbok Tour is, or was, of significance to New Zealanders.

**chemistry**

When magnesium is burnt completely in air the totol mass of the product was found to be grater than the original mass of the piece of magnesium.explain

**statistics**

A certain geneticist is interested in the proportion of males and females in the population that have a certain minor blood disorder. In a random sample of 1500 males, 75 are found to have disorder, whereas 80 of 2000 females appear to have disorder. Find a 90% confidence inte...

**statistics**

It is claimed that an automobile is driven on the average more than 20,000 kilometers per year. Random sample of 10 automobile owners are asked to keep a record of the kilometers they travel. If the sample mean and standard deviation of automobile driven are found to be 23,500...

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