Saturday
July 26, 2014

Posts by Bob


Total # Posts: 2,412

12th Grade English
wow poetry in motion

Chemistry
1e-7

calculus
Coroners estimate time of death using the rule of thumb that a body cools about 2 degrees F during the first hour after death and about 1 degree F for each additional hour. Assuming an air temperature of 78 degrees F and a living body temperature of 98.6 degrees F, the tempera...

C programming
Help would be grately apreciated on this problem thank you! Backgound The employees can be any one of the two types: 1) Full-Time Salaried (FTS) and 2) Part-Time Hourly (PTH). Currently, there are totally 1050 FTS employees and 274 PTH employees in a company. The company plans...

Computers C
Backgound The employees can be any one of the two types: 1) Full-Time Salaried (FTS) and 2) Part-Time Hourly (PTH). Currently, there are totally 1050 FTS employees and 274 PTH employees in a company. The company plans to add up to 50 new employees FTS employees are paid in a f...

calculus
f(x,y)=x^2+2y^2 use the gradient vector Þf(5, 1) to find the tangent line to the level curve f(x, y) = 27 at the point (5, 1). answer choices: 1. 10x + 4y = 27 2. 2x + 4y = 27 3. 5x + 2y = 27 4. 10x − 4y = 27 5. 5x − 2y = 27

calculus
Use differentials to estimate the amount of tin in a closed tin can with diameter 6 cm and height 14 cm if the tin is 0.046 cm thick.

arithmetic
dude why do you put su hard question on here and nobody can do it

geometry
draw an acute scalene triangle ABC in the center of your paper with sides approximately 8cm 10cm and 16cm

Math
5 mins.

4th grade math
31 X 19 in expanded algorithm

chem
let's say that an average egg has a mass of 48 g. What mass would a mole of eggs have?

chemistry
Surface tension explains which of the follow- ing phenomena? I) A piece of aluminum foil floating on a lake II) A bowling ball sinking more slowly through molasses than through water III) Separating ethanol from water by distillation IV) Water beading on a windshield during th...

Physics
you use the mg-(2.3E2*cos21)for fnormal...bobpursley you really should check your work before...

economics
drop in output

geomtry
Figure it out

physics
How much spring elasticity would be needed to make a 50 pound child jump higher

Physics
17.4

physics
A bus traveling 85 km/hr is brought to a stop in 135 m. If the mass of the bus is 2250 kg, what was the retarding force provided by the brakes? Formula please

Algebra
Thank you

Algebra
why 32?

Algebra
4a/16 + a/16 =?

1st grade
the girls past was bad

physics
A man pushes on a piano of mass 180 so that it slides at a constant velocity of 12.0 down a ramp that is inclined at 11.0 above the horizontal. No appreciable friction is acting on the piano. Calculate the magnitude and direction of this push A. if the man pushes parallel to t...

chemistry
A propane barbeque is used to heat up 400g of water in an aluminum pot until it is boiling. Using the following information, calculate the molar enthalpy of propane. You can assume the temperature of the water and the temperature of the aluminum pot are always the same. Initia...

chemistry
A 10.0 g sample of liquid gallium metal, at its melting point, is added to 50.0g of water. The initital temperature of the water is 24.0 degrees C. If the molar enthalpy of freezing gallium is -5.54 kj/mol, what is the final temperature of the water? Thanks

PHILOSOPHY
What was William of Ockham's position on predestination? Where is a good sight to find imformation on this subject?

math
What are the measures of the angles of a right triangle with side lengths of 1, 2, and sqroot of 2? please show/explain work

MATH
a ball of radius 1 is dropped into a V-shaped gutter. The ball touches the gutter's sides at the ball's equator. If the shortest distance from the surface of the ball to the vertex of teh gutter is 1, what is the angle formed by the sides of the gutter?

math
a ball of radius 1 is dropped into a V-shaped gutter. The ball touches the gutter's sides at the ball's equator. If the shortest distance from the surface of the ball to the vertex of teh gutter is 1, what is the angle formed by the sides of the gutter?

math algebra
how would i do this problem elina and teresa raced on their bikes to the library after school. they both left at 3:00 pm and bicycled along the same trail elina rode at the speed of 12 miles an hour and teresa rode at the speed of 9 mph. elina got there 15minutes before teresa...

calculus
A rectangle is constructed with its base on the diameter of a semicircle with radius 5 cm and with two vertices on the semicircle. What are the dimensions of the rectangle with maximum area?

calculus
A square-based, box-shaped shipping crate is designed to have a volume of 16ft^3. The material used to make the base costs twice as much (per ft^2) as the material in the sides, and the material used to make the top costs half as much (per ft^2) as the material in the sides. W...

chem
A scuba diver's tank contains .25 kg of oxygen compressed into a volume of 4.3 L (for oxygen, 32g = 1 mole) Calculate the gas pressure inside the tank at 9 degrees Celsius What volume would this occupy at 26 degrees Celsius and .95 atmospheres? can someone tell me how many...

chemisty help please
I still don't get it.. lol

chemistry
I looked at that guys and i still dont get it.

chemistry
A scuba diver's tank contains .25 kg of oxygen compressed into a volume of 4.3 L (for oxygen, 32g = 1 mole) Calculate the gas pressure inside the tank at 9 degrees Celsius What volume would this occupy at 26 degrees Celsius and .95 atmospheres?

Algebra
Hot Java Coffee Company adverties their decaffeinated coffee as 97% caffeine free as compared to their regular caffeinated coffee. If a cup of coffee is 8 ounces, how many ounces of decaffeinated coffee would you have to drink to get the equivalent amount of caffeine found in ...

chemistry
What volume of HCl gas is produced by the reaction of 2.4 liters of H2 gas with 1.5 liters of Cl2 gas? (Volumes are at the same T and P.) 1. 3.0 liters 2. 4.8 liters 3. 0.75 liters 4. 2.4 liters 5. 1.5 liters

Word within the Word Analogy Help
how fast can you answer??

chemistry
Thanks, I thought I could use Boyle's Law, but it seemed too easy.

chemistry
Two gases are contained in gas bulbs connected by a valve. Gas A is present in a 56 L bulb at a pressure of 213 torr. Gas B exerts a pressure of 683 torr in a 74 L bulb. What is the partial pressure of gas B after they equilibrate once the valve has been opened? Answer in unit...

chemistry
Calculate the number of carbon atoms in 0.75 L of acetone (CH3COCH3). (density = 1.3 g/mL and boiling point = 48.5 degrees Celsius)

chemistry
CaCN2

chemistry
Consider the following reaction: CaCN2 + 3H2O ¨ CaCO3 + 2NH3 105.0 g CaCN2 and 78.0 g H2O are reacted. Assuming 100% efficiency, which reactant is in excess and how much is leftover? The molar mass of CaCN2 is 80.11 g/mol. The molar mass of CaCO3 is 100.09 g/mol. 1. ...

poetry
Can someone explain what the poem is trying to tell in "Ode to the West Wind" I read from other sites but I don't understand it... I believe that it is talking about death...

biochemistry
wfwfrgffdgbhyujhyujb

chemistry
89.8%

physics
find the force exerted by the rope on the car when the angle is 2.9 degrees and you are pulling with a force of 384 N but the car does not move

calculus
Find parametric equations for the line through the point P(2, 9, 4) that is parallel to the plane x + y + z = 6 and perpendicular to the line x = 5 + t , y = 5 − t , z = 5t . Answer Choices: 1. x = 2 + 6t, y = 9 + 4t, z = 4 + t 2. x = 2 + t, y = a + t, z = 4 − 2t ...

calculus
Find an equation for the surface consisting of all points P(x, y, z) equidistant from the point P(0, 1, 0) and the plane x = 3. Answer Choices: 1. y2 + z2 − 6x + 2y − 8 = 0 2. x2 + z2 + 6y − 2z − 8 = 0 3. y2 + z2 + 6x − 2y − 8 = 0 4. x2 + z2...

calculus
If a is a vector parallel to the xy-plane and b is a vector parallel to k, determine |a ~ b| when |a| = 3 and |b| = 2. 1. |a ~ b| = −6 2. |a ~ b| = −3ã2 3. |a ~ b| = 3 4. |a ~ b| = 3ã2 5. |a ~ b| = 0 6. ...

Statistics
z = 50

physics
fail...

physics
You are given a vector in the xy plane that has a magnitude of 84.0 units and a y component of -49.0 units. Assuming the x component is known to be positive, specify the vector V which, if you add it to the original one, would give a resultant vector that is 71.0 units long an...

physics
NVM!

physics
When Mary is 22 m from the finish line, she has a speed of 4.0 m/s and is 5.0 m behind Sally, who has a speed of 5.0 m/s. Sally thinks she has an easy win and so, during the remaining portion of the race, decelerates at a constant rate of 0.51 m/s^2 to the finish line. What c...

american studies
henry hudson

Physics
If a car starts from rest and travels for 5.0 seconds with a uniform acceleration of +1.5 m/s2. The driver then applies the brakes for 3.0 seconds, causing a uniform acceleration of - 2.1 m/s2.

physics
isnt it 9.81 m/s^2?

math
wolfram alpha!

physics
it was a stupid format and i ran out of tries. Basically it wanted me to divide .707 by .293. The worst part is that it was worth a lot =[ o well

physics
In the vertical jump, an Kobe Bryant starts from a crouch and jumps upward to reach as high as possible. Even the best athletes spend little more than 1.00 s in the air (their "hang time"). Treat Kobe as a particle and let ymax be his maximum height above the floor. ...

physics
so i get v(t)=-(13*5)/t

physics
I would know how to solve this problem if i were to understand the whole t/t_0 thing. I dont know how to integrate something like that. Could you please explain how to get it started

physics
The velocity of a particle constrained to move along the x-axis as a function of time t is given by: v(t)=-(13/t_0) sin(t/t_0). a)If the particle is at x=4 m when t = 0, what is its position at t = 5t_0. You will not need the value of t_0 to solve any part of this problem. b)D...

physics
What angle does the tangent to the curve y(x)=sin^2(x/9)+16sin(x/9) at x=9\pi make with the x-axis?

physics
E^2/(e^(E/T)-1)Evaluate dn/dE at fixed T and enter it below.

College Chemisty
Al

Math [Interest]
Okay, so I've been away from school for three weeks, and we have a math test tomorrow. I only just found out, and my friend emailed me the review questions. If someone could help me out, and show me how to do this, I'd appreciate it. No, I do not want someone to do my ...

math
it is impossible

spanish
what does que te encatanda mas,el chocolate o la pizza mean

Physical Science
Would the change be a negative number?

Physical Science
A 1.0 kg glass bowl at 37 °C is placed in a freezer. How much heat will the freezer have to remove from the bowl to take it to 0 °C? (cglass = 0.2 cal/deg-gm)

Trig
If b=5 , the angle C=50 and the angle A=50 find the other angle B and the remaining sides and . Give your answer to at least 3 decimal places.

engineering
Using mechanics of materials principles, (i.e. equations of mechanical equilibrium applied to a free-body diagram), derive the following equations: s’ = s cos2q = s[(1+ cos 2q) / 2] t' = s sinq cosq = s [sin 2q / 2] s=sigma, q=theta, t=tau I have looked in "Theor...

Math Algebra
kassie an kesya are dividing $39 into two parts in order that the sum of 2/3 of one part and 3/4 of the other part is $28. What are the parts?

PLEASE HELP
WOULD IT BE 13 OVER 30

PLEASE HELP
PLEASE ANSWER THE FRACTION 14 OVER 15 - THE FRACTION 1 OVER 2. HURRY!

calc
(e^x + e^-x)/2=1

Math
so the answer is 7/12?

history
i know how to write an essay, it's this topic that i need help with, like what can you learn from it? and was it neccesary or not?

history
explain reign of terror face in the french revoloution. discuss robesperre's involvement and evolution of \his political views. do u think it was neccessary in the revolution? what lessons can be learned from this event? i have to write an essay on this please give me any ...

math
wouldnt the distance be 3 miles though if the one mile train must travel 1 mile (distance of itsself) plus the distance of the other train which is 2 miles?

math
a freight train that is 1 mile long is traveling at 60mph. a second train that is 2 miles long is traveling 40mph. the trains are moving in opposite directions on parallel tracks. how many seconds does it take between the time their locomotives meet and their cabooses fully pa...

math
find a such that f(x)= ax2-4x+3 has a maximum value of 12

math
find a such that f(x)= ax2-4x+3 has a maximum value of 12

calculus
Find the area of the region lying inside the polar curve r = 2(1 − cos theta) and outside the polar curve r + 4 cos(theta)= 0.

calculus
Find the area of the region lying inside the polar curve r = 2(1 − cos theta) and outside the polar curve r + 4 cos(theta)= 0.

calculus
find the area of the region bounded by the polar curve r=sqrt(6ln(theta)+3 as well as the rays theta=1 and theta=e

Algebra 2
Let (x1,y1) be a solution, other than (0,0), of a direct variation equation. Write an second direct variation equation whosegraph is perpindicular to the graph of the first equation.

Physics
Two identical point charges are fixed to diagonally opposite corners of a square that is .5m on a side. Each charge is 3.0E-6 C. How much work is done by the electric force as one of the charges moves to an empty corner?

12th grade
Explain the process by which hrothgar wins power and fame?

Science
A mixture of 10.902 g if iron(II) oxide and 6.524 g of aluminum metal is placed in a crucible and heated in a high temperature oven, where a reduction of the oxide takes place: 3 FeO(s) + 2Al(ℓ) ! 3 Fe(ℓ) + Al2O3(s) . What is the limiting reactant? What is the maxi...

Chemistry
1.19 atm

chemistry
express liquid pentanol and gaseous oxygen as a chemical reaction

math
andy has 23 coins worth 3.65 consisting of only quarters and dimes.how manydimes does he have?

VESPR theory
But is a molecule with an electronic geometry of tetraheydral and a molecular geometry of bent the only one like that? Why doesn't a square pyramidal have <120 degree angles when it has a lone pair? Or does it? I feel like more of the bond angles should be less than the...

VESPR theory
On one of my pages of notes, it lists all the different shapes and the bond angles that go along with them. Next to bent (2 lone pairs, 2 bonds), it says <109.5 degrees for bond angles. I don't understand why that one is less than 109.5, when a trigonal pyramidal isn...

VESPR theory
Is a bent tetraheydral the only shape that doesn't have a precise angle (as in it's less than 109.5 degrees)?

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