Friday
November 21, 2014

Posts by bob


Total # Posts: 2,477

physics
A 640-kg racing car completes one lap in 14.3 s around a circular track with a radius of 45.0 m. The car moves at constant speed. (a) What is the acceleration of the car? m/s2 (b) What force must the track exert on the tires to produce this acceleration?
January 6, 2012

Physics
65
December 20, 2011

Physics
A 18 kg object and a 26 kg object are connected by a massless compressed spring and rest on a frictionless table. After the spring is released, the object with the smaller mass has a velocity of 2 m/s to the left. What is the velocity of the object with the larger mass?
December 20, 2011

Math
Five employees at the Wild Fowl Publishing Company each come to work by a different one of five means: car, railroad, subway, and walking. They hold these positions at the company: art director, editor, publisher, receptionist, and secretary. Two of them are men named Finch ...
December 15, 2011

math
A popular new secretary at the law firm of Farnsworth, Newman, O’Malley, Price, and Reynolds, is taken to lunch by a different one of those five men on each of her first week on the job. Each man took her to eat at a different one of these five types of food: Chinese, ...
December 15, 2011

chem
How many grams are in 3.6 moles of agcl2?
December 15, 2011

math
what is equivalent to 98% o.49 or 100/98 or o.98 or 49/100
December 15, 2011

6 th grade Math
You can find the total number of different 4-digit numbers of choices for each digit (9) to the number of digits (4), or 9 to the 4th power. Based on this pattern, how many different 5-digit numbers could you make from the digits 1 through 8?
December 14, 2011

math 6th grade
How to write out 10 the negative 6?
December 14, 2011

math 6th grade
How to write out 10 to the negetive two?
December 14, 2011

math 6th grade
(1/2) to the 5th power= Need to know how to write this?
December 14, 2011

chemistry
Atom X has atomic mass (A) = 40 and atomic number (Z) = 20. Atom Y has A = 42 and Z = 20. How are these two atoms related?
December 12, 2011

Math Grade 3
You move the decimal to the left for example: 123 divide by 10 is 12.3
December 12, 2011

chemistry
. Compound C (MW = 550) is provided at a concentration of 25g/100mL. 1mL is taken and compound D is to be added (MW = 1025, concentration = 75mM) to give a final ratio of compound C:D of 4:1 moles ratio. What volume of compound D is to be added? ***Dr BOB222 THE 4:1 RATIO IS ...
December 11, 2011

chemistry
6. Compound C (MW = 550) is provided at a concentration of 25g/100mL. 1mL is taken and compound D is to be added (MW = 1025, concentration = 75mM) to give a final ratio of compound C:D of 4:1 moles ratio. What volume of compound D is to be added?
December 11, 2011

chemistry
6. Compound C (MW = 550) is provided at a concentration of 25g/100mL. 1mL is taken and compound D is to be added (MW = 1025, concentration = 75mM) to give a final ratio of compound C:D of 4:1 moles ratio. What volume of compound D is to be added?
December 11, 2011

chemistry
by moles
December 11, 2011

chemistry
6. Compound C (MW = 550) is provided at a concentration of 25g/100mL. 1mL is taken and compound D is to be added (MW = 1025, concentration = 75mM) to give a final ratio of compound C:D of 4:1 moles ratio. What volume of compound D is to be added?
December 11, 2011

can you please look over my answers? clauses
Select the abbreviation that tells how the italicized noun clause is used. S-subject, DO-direct object, SC-subject complement, OP-object of preposition A lecture on cleanliness was not what the children wanted to hear.
December 11, 2011

trig
The manufacturer of a propeller for a small aircraft mandates a maximum operating angular velocity of 300 rad/s. Determine whether it is safe to install this propeller whose aircraft whose engine is expected to run at a maximum of 2800 rpm
December 10, 2011

chemistry
the ratio is moles
December 10, 2011

chemistry
Compound C (MW = 550) is provided at a concentration of 25g/100mL. 1mL is taken and compound D is to be added (MW = 1025, concentration = 75mM) to give a final ratio of compound C:D of 4:1. What volume of compound D is to be added?
December 10, 2011

help!!!!
A navy destroyer is exactly 68 miles North of an aircraft carrier, which is travelling West 21 degrees North at 18 mph. what speed and bearing must the destroyer maintain if it is to reach the aircraft carrier in exactly 3 hrs? is it 226mph?
December 8, 2011

pre calc
each of three circles touches the other 2.circle A has a radius of 8 cm. circle B has a radius of 4 cm.circle C has a radius of 1 cm.a triangle is formed by connecting the centers of the 3 triangles. determine the largest angle for the triangle and in which circle is the ...
December 8, 2011

pre calc
you are 7 miles north and 4 miles west of a cabin.how far are you from the cabin? on what bearing must you walk to reach the cabin?
December 8, 2011

math
find all solutions on 0 is greater than or equal to theta < 2pi cos theta= 2sqrt3/3 4-1/2sin theta= (-16+sqrt3)/4 3(sqrt3)= -3cot theta -2=-1-2sin theta
December 8, 2011

math
the hour hand of a clock is 5 inches long and the minute hand is 6 inches long. determine the distance between the tips of the hands at 11:40 pm????
December 8, 2011

science
Is melting ice a physical or chemical change? I think it is a physical change. Am I correct?
December 8, 2011

geometry
do ur own homework
December 8, 2011

la poetry
i need help with narrative soccer
December 7, 2011

physics
An 77 person stands on a uniform ladder 4.0 long, that weighs 100 , as shown in the figure . The floor is rough; hence, it exerts both a normal force, , and a frictional force, , on the ladder. The wall, on the other hand, is frictionless; it exerts only a normal force, . the ...
December 7, 2011

Physics
A 86.0 kg diver falls from rest into a swimming pool from a height of 6.3 m. It takes 1.44 s for the diver to stop after entering the water. Find the magnitude of the average net force exerted on the diver during that time.
December 6, 2011

physics
Gas is confined in a tank at a pressure of 10 atm and a temperature of 14◦C. If 58 percent of the gas is withdrawn and the temperature is raised to 50◦C, what is the new pressure in the tank?
December 5, 2011

chemistry
4.89 atmospheres
December 5, 2011

Math
Rewrite cos(arcsin(v)) as an algebraic expression in v. i know that the answer is squroot of 1-v^2 but i dont know the process of how to come to this answer. Thanks for the help!
December 4, 2011

10th grade World History
fdsgdfgdfgsdf
December 3, 2011

physics
A spaceship of mass m travels from the Earth to the Moon along a line that passes through the center of the Earth and the center of the Moon. (a) At what distance from the center of the Earth is the force due to the Earth three times the magnitude of the force due to the Moon?
December 2, 2011

math
WAZUPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP NMY FRIEND HAHA
December 2, 2011

math
HIHIHIH
December 2, 2011

calculus
What is the area under each of the given curves? y=e^x/2 ; x=0 x=1
December 1, 2011

English 7 Essay: Rosa Parks (Ms. Sue)
hi
December 1, 2011

Calculus
for the function F(t)=ln(t^2), let f(t)=F'(t). Write the integral from a to b of f(t) dt and evaluate it with the fundamental theorem of calculus. the integral from 1 to 3 ___ dt= __
November 30, 2011

Economics
Suppose that some firms in a competitive industry are earning zero economic profits, while others are experiencing losses. All else equal, in the long run, we would expect the number of firms in the industry to A. increase. B. decrease. C. remain the same. D. We do not have ...
November 29, 2011

Economics
If the market price falls below $4.50, the firm will earn A. positive economic profits in the short run. B. negative economic profits in the short run but remain in business. C. negative economic profits in the short run and shut down. D. zero economic profits in the short run.
November 29, 2011

Economics
A long-run supply curve is flatter than a short-run supply curve because A. firms can enter and exit a market more easily in the long run than in the short run. B. long-run supply curves are sometimes downward sloping. C. competitive firms have more control over demand in the ...
November 29, 2011

math
what is 2 times 5
November 28, 2011

Physics
Four particles in the xy plane have the following masses and coordinates: 1 kg at (3 m, 3 m), 2 kg at (-2 m, 4 m), 3 kg at (3 m, -2 m) and 4 kg at (-3 m, -4 m). Find the total moment of inertia about: x-axis? y-axis? z-axis?
November 28, 2011

history
where can i get facts about winchester cathedral
November 20, 2011

Chemistry
Rank the following atoms in terms of decreasing atomic radius. 1. Na, N, O, Mg, F 2. F, O, N, Mg, Na 3. F, Mg, Na, O, N 4. Na, Mg, N, O, F 5. F, O, N, Na, Mg
November 18, 2011

ELA
Those were great :D But do you have anymore ideas? We need to write at least a full page
November 17, 2011

ELA
Not that kind of funny but like its from this book and here was an example Don't bite your fingernails because the nails will look nasty. But the real reason not to bite your nails is cause when you take off a nail and it goes on the floor it will grow on the floor and it ...
November 17, 2011

ELA
I have to do this project and I have to say what funny stuff could happen if I cleaned my room. I dont know anything funny that could happen. so help me? :D
November 17, 2011

math
i dont know
November 16, 2011

physics
nkkn
November 15, 2011

Physics
(3kg)(8m/s)+ (5kg)(0m/s) 24kg*m/s = (3kg+5kg)vf (8kg)vf 24kg*m/s=(8kg)vf vf=3m/s
November 15, 2011

Physics
150kg*m/s
November 15, 2011

Math
what up
November 15, 2011

Math, Please Help!!!
an engineer designs a satellite dish with a parabolic cross section. The dish is 15 ft wide at the opening and the focus is placed 4 ft from the vertex. find an equation of the parabola. I know how to work this problem, but how do I know that I use the equation y^2 = 4px ...
November 15, 2011

READING
Which line in the poem contains an example of onomatopoeia? A. Line 6 B. Line 7 C. Line 14 D. Line 15 Line 6: and you'll forget all about that broccoli you chop Line 7: Rock candy looks like beautiful glass Line 14: but spinach tastes all gritty and sandy Line 15: Taffy is...
November 14, 2011

Reading
Is it LINE 15?
November 14, 2011

Reading
Which line in the poem contains an example of onomatopoeia? A. Line 6 B. Line 7 C. Line 14 D. Line 15 Line 6: and you'll forget all about that broccoli you chop Line 7: Rock candy looks like beautiful glass Line 14: but spinach tastes all gritty and sandy Line 15: Taffy is...
November 14, 2011

Chemistry
When non-polar materials suddenly become polarized the most likely reason is due to:
November 14, 2011

Reading
WAIT no line 15
November 14, 2011

Reading
Which line in the poem contains an example of onomatopoeia? A. Line 6 B. Line 7 C. Line 14 D. Line 15 Line 6: and you'll forget all about that broccoli you chop Line 7: Rock candy looks like beautiful glass Line 14: but spinach tastes all gritty and sandy Line 15: Taffy is...
November 14, 2011

Reading
Since the 1st line ends with me and the next line ends with disagree The first line is A and the next line is B?? Then the third line ends with true and the next line ends with chew so its AABB?
November 14, 2011

Reading
Does me and disagree rhyme? it doesn't right?
November 14, 2011

Reading
Ok heres some of it Mom says that vegetables are good for me, but I am afraid I must disagree. Candy is better. I just know it's true! Because bubble gum helps me learn how to chew
November 14, 2011

Reading
What is the rhyme scheme of "Great Glorious Gobs"? A. ABAB B. BBBA C. AABB D. AABA
November 14, 2011

Calculus- rates
5
November 13, 2011

Calculus- rates
5
November 13, 2011

Social Studies
what is your primary duty if you are at electoral college
November 12, 2011

trig/math
If A is between 270degrees and 360degrees, and cos A=12/13, find the exact value of: sin2a, cos2a, sin1/2a, cos1/2a
November 11, 2011

Math, Please Help!!!
a hot air balloon is rising vertically 10 ft/sec while the wind is blowing horizontally 5ft/sec. Find the speed of the balloon and the angle x that it makes with the horizontal. I know that the speed of the balloon is the square root of (10)^2 + (5)^2, but I was wondering if ...
November 10, 2011

6th grade Math
Light travels about 1 mile in 0.000005 seconds. If a spacecraft could travel at this speed, it would travel almost 10 to the 6th power miles in 5 seconds. About how far would this spacecraft travel in 50 seconds?
November 9, 2011

algebra
s^2-4/(s+2) Simplyby removing factors of 1
November 8, 2011

Science
What are they asking in this question? Which is an alternative source of energy?
November 8, 2011

Science
What are they asking in this question? Which is an alternative source of energy?
November 8, 2011

Science
I think its corn fields but im not sure
November 8, 2011

Science
corn fields?
November 8, 2011

Science
Which source is not a source for fossil fuels? coal mine ancient swamps ancient living organisms corn fields
November 8, 2011

Science
What uses wind to generate electricity?
November 8, 2011

Science
Can you explain it?
November 8, 2011

Science
Different kinds of sedimentary rocks exist because A. they were formed in different places B. their formation took different lengths of time C. they were formed by sediments from different rocks D. they have been cut differently I THINK ITS C is that right?
November 8, 2011

geometry
Question 14: The following circle has a radius of 8 feet: What is the total area of the shaded regions?
November 4, 2011

calculus
I hate calculus
November 4, 2011

statistics
A density graph for all the possible speeds between 0 mph and 320 mph is in the shape of a triangle. What is the height of the triangle?
November 3, 2011

Chem!!
Consider the dissolution of CaCl2: CaCl2(s) -----------> Ca2+(aq) + 2Cl-(aq) ΔH=-81.5 kJ/mol An 11.0 gram sample of CaCl2 is dissolved in 125 g water with both substances at 25.0 °C. Calculate the final temperature of the solution assuming the solution has no heat ...
November 2, 2011

Science
What is the source of energy in fossil fuels?
November 2, 2011

PREDICT
In 1955 each farm worker in the United States produced enough food to feed 20 people. By 1960 farming methods had improved, and one worker could supply 25 people. By 1965 that number became 40 people. In 1970 it was 45 people.In 1975 it increased to 60 people. In 1980 one ...
November 1, 2011

Predict
In 1955 each farm worker in the United States produced enough food to feed 20 people. By 1960 farming methods had improved, and one worker could supply 25 people. By 1965 that number became 40 people. In 1970 it was 45 people.In 1975 it increased to 60 people. In 1980 one farm...
November 1, 2011

Math Logic
If there are as many rational numbers as there are irrational numbers then the set of all irrational numbers is infinite
October 30, 2011

statistics
so you look like mixed toast ha ha
October 27, 2011

Math
Which group names all the whole number factors of a composite number? A) 2,3,12,24 B) 1,5,10 C) 1,3,5,15 D) 1,31
October 27, 2011

Math
How high will a baseball that is thrown up into the air at 48 feet per second go if it starts its flight at a height 10 feet above the ground?
October 26, 2011

Language
It is b because a platypus is a platyhhelminthes, and a worm is a marsupial
October 26, 2011

Math
k thanks
October 26, 2011

Math
what does 4 _____ 6 equal
October 26, 2011

Math
what does 4 - 6 equal?
October 26, 2011

Physics
what is g
October 26, 2011

chemistry
If 25 ml of 0.11 M sucrose is added to 10 ml of 0.52 M sucrose, what will be the resulting Molarity?
October 24, 2011

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