# Posts by Joe

Total # Posts: 2,609

physics
there is a massless rope that is pulled over a frictionless pulley that is suspended high above the ground one end of the rope is tied to a heavy block with a mass of 483 kg the free end is climbed by a person with a mass of 102 kg who starts from rest. If during the time of ...

physics
At a track-and-field meet, the best long jump is measured as 8.00 m. The jumper took off at an angle of 46° to the horizontal. (a) What was the jumper’s initial speed? (Neglect air resistance.) 1 m/s (b) If there were another meet on the Moon and the same jumper could...

Physics
A car starts from rest and accelerates unifomly at 3m/s^2. A second car starts from rest 6 seconds later at the same point and accelerates uniformly at 5m/s^2. How long does it take the second car to over take the first car?

chemistry
S is Positive

Chemistry
What mass of NaCl is needed to precipitate all the silver ions from 20.0 mL of 0.100 M AgNO3 solution?

geometry
in the diagram below of triangle abc, de is a midsegment of triangle abc, de=7, ab=10, and bc=13.find the perimeter

Science
how much heat is required to change 5 grams of iron to 10c

physics
Mars has a mass of about 6.8 × 1023 kg, and its moon Phobos has a mass of about 9.5 × 1015 kg. If the magnitude of the gravitational force between the two bodies is 4.66 × 1015 N, how far apart are Mars and Phobos?

Math (Translate each sentance into a equation)
the product of Mike's age and 4 is 52

American Gov
Family

physics
ham

CIS 115
Can someone post an actual answer to this question either with paint or visual logic please?

trig
evaluate the expression below at t=4 p=\$400 and r=-9% round youre answer 2 decimal place

ochem
at room temperature is caffeine soluble in water or dichloromethane

Calculus
If f(x)=[(x−1)/(1+5x)], there are two points on the graph of y=f(x) at which the tangent lines are parallel to the line x−2y=2. Type in the x values of these points. Type the smaller number first, then the larger number.

science
Tight junctions prevent the movement of the extracellular matrix between cells. A) True B) False Which one is it please :)

science
Tight junctions prevent the movement of the extracellular matrix between cells. A) True B) False Which one is it please :)

calculus
Piecewise f(x) = { (x^2, x<=2) (mx + b, x>2) I am not sure what the graph would look like for the 2nd function. Any tips on drawing functions like this would be of great help.

chemistry
A foundry releases 6.0 tons of gas into the atmosphere every day. The gas mixture contains 2.5% sulfur dioxide (SO2) by wieght. How many pounds of SO2 are released in one week?

Physics
A 1596 kg car traveling at 24.91 m/s skids to a halt. What is the change in the combined thermal energy of the car and the road surface?

Physics
A 1596 kg car traveling at 24.91 m/s skids to a halt. What is the change in the combined thermal energy of the car and the road surface?

Physics
A 50 g ice cube can slide without friction up and down a 32° slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 10.16 cm. The spring constant is 22 N/m. When the ice cube is released, what distance will it travel up the slope...

Physics
A 50 g ice cube can slide without friction up and down a 32° slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 10.16 cm. The spring constant is 22 N/m. When the ice cube is released, what distance will it travel up the slope...

math

math
what is 2+2 equal to?

Math 124
There are several ways you might think you could enter numbers in WebAssign, that would not be interpreted as numbers. N.B. There may be hints in RED!!! You cannot have commas in numbers. You cannot have a space in a number. You cannot substitute the letter O for zero or the ...

physics
Use kinematics to find the time it will take the rock to fall to the ground. (delta)x = V(initial)(time) + .5at^2 (delta)x = 0 + .5(-9.8)t^2 First term drops out because initial velocity is zero. Acceleration is that due to gravity. Negative sign is because it is accelerating ...

AP Physics
By Snell's law, n(incident)sin(theta(incident)) = n(refracted)sin(theta(refracted)) or n(1)sin(theta(1)) = n(2)sin(theta(2)) Solving for theta(2) sin(theta(2)) = [n(1)sin(theta(1))]/n(2) Theta(2) = arcsin [n(1)sin(theta(1))]/n(2) Theta(2) = arcsin ((1)(sin(33.5))/1.33 or ...

physics
some massive butt mud

Dynamics
39.22 m/s

math
john's high score on the asteroid game was 326,700. mike's high score was 418,200. rebecca just plated the game and her high score was halfway between john's and mike's. what was rebecca's score?

Thank you for all your help

1.If I had a picture of a family having fun in the snow-I'm not sure how to say that-- a.La familia divertirse en la nieve b.La familia se divertir en la nieve c.La familia diviertese en la nieve d.La familia se divierte en la nieve I think it is (a) 2. If a muchacho is ...

Spanish
Could you please check these -thank you 1.How do you say I am going to wake up early I think it is "Yo me voy a despertar temprano" 2. What is another way of saying "Voy a secarme el pelo. Is it "Me voy a secar el pello.

PHYSICS

Physics
The acceleration due to gravity on the moon is about one sixth its value on earth. If a baseball reaches a height of 62 m when thrown upward by someone on the earth, what height would it reach when thrown in the same way on the surface of the moon? Answer in units of m

algebra
you rent a car for \$55.00 a day. .20 cents a mile , and you pay \$80.00 at the end of the day. how many miles did you drive

statistics
You ask a neighbor to water a sickly plant while you are on vacation. Without water the plant will die with probability 0.8. With water it will die with probability 0.4. You are 87 % certain the neighbor will remember to water the plant. You come back from the vacation and the...

Physics
A ball is thrown straight up and rises to a maximum height of 24 m above the ground. At what height is the speed of the ball equal to half of its initial value? Assume that the ball starts at a height of 1.9 m above the ground.

turdy truck

Chem 151
23, 54

Chem
A mass spectrum of phosporus atoms shows only a single peak at a mass of 31 what can you conclude from this observation?

psycology
nisa has grown up in a small villegein the foothills. There was no electricity and water had to be hand pumped.they seldom saw people from the outside.when she entered school the bus had to pick her up

Chemistry
Beryllium Chromate Pentahydrate

Chemistry
Use Boyles law P1V1 = P2V2 Answer 112 kPa (850)(x)=(1700)(56) <--- Equation

Use density to find the mass Density * Volume = Mass of Coolant Make sure to convert 26.5 to ml or take 1.11 g/ml to 1.11 g/L.

algebra 1

algebra 1
Distribute the 5 9+105x

Math
Fair Coins*

Math
1. When four fan coins are flipped what is the probability of getting either exactly two heads of exactly two tails? 2. Solve for x 3x-x√3=-6 3. In the figure below ABCD is a rectangle and DE=DC. Given Ad= 5 and BE=3 find DE Thanks!

Bio
How much NaC3H5O3 (in grams) is needed to create a 1000 ml volume of Ringer’s lactate solution?

science
idk

arithmetic
What is the sum of the arithmetic sequence 22, 13, 4 … if there are 28 terms?

algebra
select T.branch_name from branch T, branch S where T.assets > S.assets and S.branch_city = "Brooklyn" Write an efficient relational algebra expression that is equivalent to this above query. Here is my answer: á T.branch_name (T.assets > S.assets v S....

math
select T.branch_name from branch T, branch S where T.assets > S.assets and S.branch_city = "Brooklyn" Write an efficient relational algebra expression that is equivalent to this query. Here is my answer: á T.branch_name (T.assets > S.assets v S....

Physics
A dog runs 50 m 30¢ª south of east and then turns and runs 75 m 45¢ª north of east. Determine the dog's resultant displacement

English
What is the meaning of validity, truth, and soundness as they relate to logical syllogisms

physics
9.4

Math
An angle θ, in standard position, has its terminal side in Quadrant IV on the line 12x + 5y = 0. Find the exact values of sin θ and cos θ.

math
write an inequality for the p (in dollars)described. Price start at \$12.99

math
Suppose you have a 64 gigabyte flash storage system, with a 4096 byte page size. How big would the flash translation table be, assuming each page has a 32 bit address, and the table is stored as an array. I think the answer is 20 pages, does that sound about right?

Math

Math
Find the quotient a^2x^3 + (5a^2b+ab)x^2 + (ab^3+5ab^2)x + b^4 divided by ax + b ^ symbolize power so a^2x^3 means a squared times x cubed.

math
I know its hard to see, but the triangle looks like this /_| with the legs on the right and bottom with the hypotenuse on the left. They give you y for the right leg and x for the bottom leg, no hypotneuse. o is the bottom right angle and a is the top right angle. So I don'...

math
Given the triangle shown, describe the function values in term of the triangle's two legs /| /a| y / | /o__| x Find: sec a Find: csc o

statistics
In a preliminary study, the sample standard deviation for the duration of a particular back pain suffered by patients was 18.0 months. How large a random sample is needed to construct a 90% confidence interval so that an estimate can be made within 2 months of the actual duratio

PreCalc - Sequence
A ball is dropped from a height of 20 ft and always rebounds 1/4 of the distance fallen. A. write a sequence for the first 3 rebound heights B. How high is the 6th rebound? C. Find the sum of all possible rebounds. I keep getting numbers that are too high. I don't think I ...

math
X+(1/6)=(1/3) get X by itself by subtracting 1/6th from both sides. x(+1/6)-(1/6)=(1/3)-(1/6) x=(1/3)-(1/6) x=(1/6) These operations of getting the variable(s) on one side will be the basis of many of your future calculations as you progress through mathematics.

math
help solve x + 1/6= 1/3 thanks

math
solve by substitution method. 5m+n=36 m-5n=54 the everton college store paid 1,859.00 for an order of 49 caculators the store paid 11.00 for each scientific calculator. the others ,all graphing caculators, cost the store 55.00 each. how many of each type of caculators was ...

Pre Cal/Vectors
Can someone show the steps involved in figuring out this type of problem? Given the magnitudes of vectors u and v and the angle Ό between them, find the magnitude of the sum u + v to the nearest tenth and the angle that the sum vector makes with u to the nearest degree. /...

Vectors
If /U/=9, /V/=11, and theta = 43 deg (angle between), find the magnitude of U+V and give the direction that the that the resultant makes with U.

structured query language math
Display a list of all instructors, showing their ID, name, and the number of sections that they have taught. Make sure to show the number of sections as 0 for instructors who have not taught any section. Your query should use an outerjoin, and should not use scalar subqueries...

math write in sql
Display the list of all departments, with the total number of instructors in each department, without using scalar subqueries. make sure to correctly handle departments with no instructors. Is this the right answer: select department.dept_name from department natural left ...

math write in sql
I have this question i need to know how to do for a test coming up this week. a)Display the list of all course sections offered in Spring 2010, along with the names of the instructors teaching the section. If a section has more than one instructor, it should appear as many ...

SQL
Im am running oracle. Here is what i have for the first query:select ID, name, from instructor natural left outer join section where sec_id >= 0.

SQL
This is a practice problem that the book has no answer for and needed to see how these two problems are done so i can be prepared for a test next week. The both need to be written in structured query langauge.

SQL
Display a list of all instructors, showing their ID, name, and the number of sections that they have taught. Make sure to show the number of sections as 0 for instructors who have not taught any section. Your query should use an outerjoin, and should not use scalar subqueries...

trig
Given that SIN Theta = -1/sqrt(10) and theta is in quadrant 4, find sin2theta and cos2theta. I'm not sure how to properly square the -1/sqrt10 and keep an exact answer other than decimal. Otherwise, my final answer is Sin2Theta = -.7255970691 and cos2theta = 1.632455533

Pre-Calculus
Given that SIN Theta = -1/sqrt(10) and theta is in quadrant 4, find sin2theta and cos2theta. I'm not sure how to properly square the -1/sqrt10 and keep an exact answer other than decimal. Otherwise, my final answer is 1.632455533

Calculus
positive 5.47

Calculus
-13.67?? ...

Calculus
The altitude of a triangle is increasing at a rate of 3000 centimeters/minute while the area of the triangle is increasing at a rate of 1500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 9500 centimeters and the area is 87000...

algebra
simplify by removing the factors of 1 p^2-4/(p+2)^2

algebra
simplify by removing the factors of 1 p^2-4/(p+2)^2

English
Lying in a Hammock at William Duffy's Farm in Pine Island, Minnesota? What is the significance of this poem? What does the author mean by the last line? I don't understand what this poem is about and any help would be greatly appreciated! Over my head, I see the bronze...

chemistry
If 10 calories of heat are added to two grams of liquid water what is the temperature of the water

COLLEGE ALGEBRA
Sue, a recent retiree, requires \$6,000 per year in extra income. She has \$50,000 to invest and can invest in B-rated bonds paying 15% per year or in a certificate of deposit (CD) paying 7% per year. How much money should be invested in each to realize exactly \$6,000 in ...

math
What formula would you use to figure out this word problem? A rectangular pen for a pet is 8 feet longer than it is wide. Give possible values for the width W of the pen if its area must be between 180 and 825 square feet, inclusively.

Algebra
James has saved \$50. He wants to buy a DVD player for \$149 in about 5 months. To find out how much he should save each week he wrote 50+20x=149. Explain his equation.

math
if i made \$65,000 a year and got a \$3000 raise. what would be the precent increase rounded to the nearest tenth

COLLEGE ALGEBRA
.7638

physics
ya get it 69

physics
...

physics
...

physics
fist you take 100 and then *2 to get 200 then do3.275 * 40 and get 131 then all you need to do is 200-131... and get______________________________________________

Math
7yd 2ft 3in - 2yd 2ft 9 in

Math
A pyramid is inscribed in a cube whose volume is 52(pi) cm^3. The volume of a sphere is equal to the volume of this pyramid. Find the volume of a second cube whose edge is equal to the radius of the sphere.

math
sorry i don't understand the question

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