Monday
October 20, 2014

Posts by Bob


Total # Posts: 2,428

physics
A ball is thrown up onto a roof, landing 4.50 s later at height h = 20.0 m above the release level. The ball's path just before landing is angled at θ = 54.0˚ with the roof. (a) Find the horizontal distance d it travels. What are the (b) magnitude and (c) angle (...
February 23, 2011

math
Find the expected value of a $1 bet in six-spot keno if three winning spots pays $1 (but you pay $1 to play, so you actually break even), four winning spots pays $3 (but you pay $1 to play, so you profit $2), five pays $100, and six pays $2,600.
February 22, 2011

geometry
what does 44 feet by 9 feet by 8 feet mean
February 22, 2011

physics
7.84*10^10
February 22, 2011

Calculus - Functions?
a billion
February 21, 2011

Science
What type of plate boundary is located at the Juan de Fuca plate and Washington state on the north American plate?
February 21, 2011

math
(radical d)!=24
February 20, 2011

The United States Until 1877
We actually do not have a book. It comes from in class lectures that we take notes on. however, missing one note that you might not write down throws you off alot.
February 20, 2011

The United States Until 1877
I am completely clueless on where to start. Its for a study guide to help us prepare for a test.
February 20, 2011

The United States Until 1877
Compare and Contrast the development of the New England, Middle, Chesapeake, and Southern Colonies. Discuss the economic, religious, and social development of each from first settlement by the British to 1750.
February 20, 2011

us history until 1877
By 1700 the British colonies on the North American mainland were remarkably different, and in many ways isolated from one another. As late as 1760 Benjamin Franklin declared that a union of the colonies was “not merely improbable, it is impossible,” because the ...
February 20, 2011

physics
bob
February 18, 2011

pre-algebra
a bag contains 5 green marbles 2 white marbles 8 blue marbles 9 red marbles and 6 black marbles what is the probability of drawing a white marble replacing it and then drawing a green marble? Answer choices A 1/6 B 1/15 C 1/87 D 1/90 I think its D, but I am not sure and how ...
February 17, 2011

geometry
idk...
February 13, 2011

math
draw pattern block with a total of 22 sides
February 13, 2011

Math
What is the length of a rectangular lot that has a perimeter of 1400 m and a width of 100 m?
February 13, 2011

physics
A ball of mass m = 0.75 kg is thrown straight upward with an initial speed of 8.9 m/s. Plot the gravitational potential energy of the block from its launch height, y = 0, to the height y = 5.0 m. Let U = 0 correspond to y = 0. Determine the turning point (maximum height) of ...
February 13, 2011

physics
A ball of mass m = 0.75 kg is thrown straight upward with an initial speed of 8.9 m/s. Plot the gravitational potential energy of the block from its launch height, y = 0, to the height y = 5.0 m. Let U = 0 correspond to y = 0. Determine the turning point (maximum height) of ...
February 13, 2011

geometry
What Is The Area Of A Circle If The Radius Is 10 Inches?
February 11, 2011

art101
1. CheckPoint: Greek and Roman Architecture • Resource: Ch. 15 of A World of Art • Write a summary comparing the characteristics and innovations of each Greek and Roman architecture in 200 to 300 words. • Provide two representative examples of architecture for ...
February 11, 2011

College Electric Physics
(a) What is the electric potential energy in joules of two electrons separated by 1.98 nm? (b) What would be it be if the separation was doubled?
February 11, 2011

Physics
A sprinter accelerates at 4 m/s2 for 3 seconds, and then runs the rest of the race at a constant speed. If the race is 100 m, how much time does the sprinter take to fi nish the race?
February 11, 2011

Algebra
What is the area of a circle whose diameter is given by the expression 10x?
February 8, 2011

math
Forrest Lumber uses the function S(t) = -75t + 375 to determine the salvage value S(t), in dollars, of a table saw t years after its purchase. How long will it take the saw to depreciate completely?
February 7, 2011

math
Samantha can ride her bike to work in 2/3 of an hour. When she drives to work it takes 1/3 of an hour. If she drives 12 miles per hour faster than she rides her bike, how fast does she ride her bike?
February 7, 2011

English 1
tgfrvh,ki
February 5, 2011

English 1
do your own work
February 5, 2011

math
two girls caught 25 frogs. lisa caught four times as many as jen did. how many frogs did jen catch
February 3, 2011

MATH
a golf ball dropped onto a hard surface rebounds exactly 1/3 of the height from which it falls. how far will it rebound after hitting the surface for the third time if it initially dropped from a height of 18 feet
February 3, 2011

math
two girls caught 25 frogs. Lisa caught four times as many as Jen did. how many frogs did Jen catch
February 3, 2011

math
company claims 10% are green. suppose that candies are packaged randomly into samll bags of 50. school children studying percent open several bags, count colors and find the proportion that are green. a. is the Normal model appropriate here? explain b. where is the center? ...
February 2, 2011

Science
the candy nerds
February 2, 2011

Science
what about nerds
February 2, 2011

math
51/17
February 2, 2011

algebra 1
5m-m+8+=0
February 2, 2011

Physics
idk
February 1, 2011

Math
simplify: 5-s(4-7)+3s show steps
January 30, 2011

Chemistry
If Kc = 0.143 at 25°C for this reaction, find the equilibrium concentrations of C6H12 and CH3C5H9 if the initial concentrations are 0.200 M and 0.075 M, respectively. a. [C6H12] = 0.041 M, [CH3C5H9] = 0.041 M b. [C6H12] = 0.159 M, [CH3C5H9] = 0.116 M c. [C6H12] = 0.241 M...
January 30, 2011

Pre-Algebra
I don't get it because the choices are A. 25 mins B. 35 mins C. 85 mins D. 1500 mins
January 30, 2011

Pre-Algebra
Cheng drives 25 miles on a highway at a constant rate of 60 miles per hours. Jow much time does the trip take?
January 30, 2011

math
n + (n + 1) + (n + 2) =45
January 29, 2011

computers
When you press the power button on your computer, it doesn’t turn on. There is nothing…silence…absolute zero. There are no beeps, no whistles, nothing. The monitor is getting power and the power strip is turned on. 1.Draw a diagram of the wiring scheme based on ...
January 27, 2011

algebra
The force of gravity is inversely proportional to the square of the center of the earth. if you weigh 120 lbs on the surface of the earth, how much would you weigh 250 miles above the surface? (Earth's radius = 4000 miles)
January 27, 2011

4th grade math
38 is the answer
January 26, 2011

science
object weighs 40 N on earth's surface. it would weight on 10 N when its distance from earth's center is doubled halved tripled or quadrupled thankyou
January 25, 2011

science
object weighs 40 N on earth's surface. it would weight on 10 N when its distance from earth's center is doubled halved tripled or quadrupled thankyou
January 25, 2011

Math
3p^2+4P^2=63
January 23, 2011

Math
3p^2+4P^2=63
January 23, 2011

math
3p^2+4P^2=63
January 23, 2011

Math
The distance between the points (14,-18) and (15,-8) is? The point (a,b) is such that (14,-18) is the midpoint of the segment from (15,-8) to (a,b). Then a and =?
January 23, 2011

chemistry
Nevermind, the correct answer was at the top of the next page so I didn't see it.
January 21, 2011

chemistry
Nope, it was 10 degrees C, which is why I'm stumped. I didn't think any of the answer choices were right, either.
January 21, 2011

chemistry
Which of the following constants are needed to calculate the change in enthalpy (H) for heating a sample of liquid water at 10C to steam at 150C. I) the heat capacity of water II) the enthalpy of fusion of water III) the heat capacity of ice IV) the enthalpy of ...
January 21, 2011

chemistry
thanks
January 21, 2011

chemistry
I think that's what I'm looking for.
January 21, 2011

chemistry
I, IV and V only 005 10.0 points When a chemical reaction comes to equilibrium, both the forward and the reverse reactions continue, but their rates are equal. For such a system at equilibrium at 300 K and 1.00 atm pressure, the change in Gibbs free energy as the forward ...
January 21, 2011

math
if a triangle has side lengths of 6cm, 9cm and x cm, what are possible values for x?
January 20, 2011

physics
I'm sorry I meant 1.5J
January 18, 2011

physics
The answer is 15J
January 18, 2011

MATH
A is the midpoint of BC. BA=2x+5 and BC=5x-3. solve for x and find the length of BC
January 16, 2011

physics
20
January 16, 2011

honors chemistry
no, that is what i meant to type, that's just the question on my homework
January 13, 2011

honors chemistry
Which gas has solubility in water (at STP) of 3.39 L at 10.0°C?
January 13, 2011

9th grade alegbra
The sum of two numbers is 90.their difference is 18.find the numbers.
January 11, 2011

science
if earth is one astronomical unit from the sun and has a period of 1 year, approximately how far is planet X form the sun if it has a period of 26 yearS
January 11, 2011

Iron and Sulphur reaction
iron+sulfur(or sulphur)=FeS
January 10, 2011

math
Dents and Dings Auto Body buys paint with a list price of $29,000. If the supplier extends trade discounts of 30/35/20, what is the trade discount amount?
January 9, 2011

chemistry
In one mole of the compound nitrogen diox- ide, what fraction of the total number of ions is the nitrogen ion?
January 9, 2011

Math
write a formula that gives you the number of regions formed when x points are placed on a circle and all possible chords are drawn. ex. 2pts has 2 regions, 3pts has 4 regions, 5pts has 17 regions
January 7, 2011

math
??????
January 5, 2011

Physics
A 10 kg crate is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling force is 86 N parallel to the incline, which makes an angle of 30 ° with the horizontal. Assuming the coefficient of kinetic friction is 0.4 and the crate is pulled a distance of 7.5 ...
January 5, 2011

trig
what is the value of the discriminant x^2-9
January 5, 2011

Physics 12th Grade
Two girls with masses of 50.0 kg and 70.0 kg are at rest on frictionless in-line skates. the larger girl pushes the smaller girl so that the latter rolls away at a speed of 10.0 m/s. What is the effect of the action on the larger girl? What is the impulse that each girl exerts...
January 5, 2011

chemistry
A solution of ethanol (C2H5OH) in water is prepared by dissolving 87.4 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
January 3, 2011

Geometry
Find the surface area of a right octagonal pyramid with height 2.5 yards, and its base has apothem length 1.5 yards.
December 30, 2010

Physics
990 N
December 29, 2010

GENERAL ART
HOW DO YOU DRAW 3 D BOXES
December 21, 2010

7th Pre-Algebra Word Problem
Thanks
December 20, 2010

7th Pre-Algebra Word Problem
Approximately one-seventh of the people in the United States are left-handed. The population of the United States is about 300 million. Write and solve an equation to estimate howmany people in the United States are left handed.
December 20, 2010

Physics
Two brothers are jogging, Josh and Drake. Josh has 1/2 the KE of Drake. Also, he is twice the mass of Drake. Plus, Josh had to increase his speed by 1.35 meters/second to achieve the same kinetic energy of Drake. What is the initial velocity?
December 18, 2010

Math
prove that two triangles are congruent if they have 2 equal adjacent angles and the side inbetween them is also the same.
December 17, 2010

math
find three rational numbers between the negtive square root of 26 and the negtive square root of 15 and explain how you got the answer
December 17, 2010

Math
prove that two triangles are congruent if they have 2 equal adjacent angles and the side inbetween them is also the same.
December 16, 2010

math
Find the range of possible measures if each set of expressions represents measures of the sides of a triangle:x 2x+10, x+8
December 16, 2010

Language arts
Figurative language
December 15, 2010

geometry
Write and solve an inequality to find the calues of x for which the area of the rectangle is greater than the are of the triangle
December 15, 2010

11th grade
20xsquared+40 x+15=0
December 13, 2010

algebra
Thanks
December 13, 2010

algebra
10-d=19 What is d? I think it is -9.
December 13, 2010

math
how do you solove I=$440 P=??? R=7% T=4 years
December 9, 2010

7th grade
i need help with another I=$440,P=??,R=5%,T=4 years what is p
December 9, 2010

7th grade
thank you
December 9, 2010

7th grade
I=$440 P??? R=7% T=4years this is simple interest
December 9, 2010

7th grade
i need help with simple interest math homework.NOW!
December 9, 2010

History
dont go down really dont go i mean it
December 9, 2010

Finance
The extent to which inventory financing may be used depends on
December 9, 2010

finance
At age 5, how much would you have to save per month to have $1 million in your account at age 65, if your investment rate was 10% per year? Assume no taxes and compounding on a monthly basis.
December 9, 2010

trig
solving radical equations... help! 5+¡în+1= n+4
December 8, 2010

Honors Biology - URGENT!!!
idk
December 8, 2010

Math
12 Quarters 7 Dimes 3 Nickels
December 7, 2010

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