Friday
May 27, 2016

Posts by Jose

Total # Posts: 430

College Chemistry
For each trial, enter the amount of heat lost by the calorimeter, qcalorimeter. Be careful of the algebraic sign here and remember that the change in temperature is equal to the final temperature minus the initial temperature. Report your answer using 4 digits. Note, this is 1...
April 12, 2013

ece
Primary classroom rely more on----------- assessment than do preschool classroom
April 12, 2013

College Chemistry
For each trial, enter the amount of heat lost by the calorimeter, qcalorimeter. Be careful of the algebraic sign here and remember that the change in temperature is equal to the final temperature minus the initial temperature. Report your answer using 4 digits. Note, this is 1...
April 9, 2013

Math-Statistics
Assume that 60% of community college students are female. 1) If we pick 10 students at random justify why we can or cannot model this using a normal model. 2) Find the probability that 8 of the 10 students selected are female. 3) Find the probability that 8 of more of the 10 ...
April 8, 2013

Statistics
A study of two groups of children since early childhood: One group of 62 attended preschool. A control group of 61 children from the same area and similar backgrounds did not attend preschool. Over 10 year period as adults, 38 of the preschool sample and 49 of the control ...
April 8, 2013

Chemistry
1. Which metal is the most easily oxidized? A.) highly active metal *B.) moderately active metal C.) slightly active metal D.) an inactive metal 2. What happens in a voltaic cell? *A.) Chemical energy is changed to a electrical energy. B.) Electrical energy is changed to ...
March 27, 2013

math
joe draws a line segment 2 1/4 inches long. then he makes the line segment 1 1/2 inches longer. how long is the line segment now?
March 21, 2013

Physics please help!!
Assume a circular orbit. If a planet's distance from it star is multiplied by 25 times, then by how many times is its orbital period T multiplied ?
March 4, 2013

Physics please help!!
A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.23 hours. What is density of the planet? Assume that the planet has a uniform density.
March 4, 2013

Physics
I'm Try a But the b is: ((sigma*x)/(2*epsilon_0))*(1/(sqrt(x^2+R_1^2))-1/(sqrt(x^2+R_2^2)))
February 25, 2013

halp!
what do I use for a and k in this situation? i tried taking the derivative but no answers i come up make sense based on the problem.
February 24, 2013

Calculus
The number, N, of people who have heard a rumor spread by mass media by time, t, is given by N(t)=a(1−e−kt). There are 6 million people in the population, who hear the rumor eventually. If 5% of them heard it on the first day, find the percentage of the population ...
February 24, 2013

Math
The number, N, of people who have heard a rumor spread by mass media by time, t, is given by N(t)=a(1−e−kt). There are 6 million people in the population, who hear the rumor eventually. If 5% of them heard it on the first day, find the percentage of the population ...
February 24, 2013

Physics
(x*Q)/(4*pi*epsilon_0*((R)^2+(x)^2)^(3/2))
February 21, 2013

Physics
and the 2) (B) is 0.5
February 21, 2013

Physics
b) 1283994.39504
February 21, 2013

Physics
c) 46.244
February 21, 2013

Physics
The First is -7.901. Just this in the moment.
February 21, 2013

Physics
A 8.38g bullet is fired into a 4.60kg block suspended as in the figure. The bullet stops in the block, which rises 15.0cm above its initial position. Find initial speed of the bullet.
February 13, 2013

haematology
discuss how the body manages to maintain the cellular components whithin the reference range in an a healthy individual
February 13, 2013

Humanities
What are peer reviewed articles/journals?
February 12, 2013

algebra
what is a subponent
February 10, 2013

Chemistry
well i think it will be 183g
February 6, 2013

algebra
How do you go about solving for x in x/2 + x/3 > 5 ?
January 31, 2013

AP Chemistry
In a fit of boredom, a chemistry teaching assistant swallows a small piece of solid dry ice (CO2). The 8.9 g of dry ice are converted very quickly into gas at 311 K. Assuming the TA’s stomach has a volume of 1.5 L, what pressure is exerted on his stomach?
January 16, 2013

math
if a house square feet is 3,546 sq what is the perimeter of the house
December 19, 2012

trigonometry
5.Find the complete exact solution of sin x = -√3/2. 10. Solve cos 2x – 3sin x cos 2x = 0 for the principal value(s) to two decimal places. 12. Solve tan^2x + tan x – 1 = 0 for the principal value(s) to two decimal places. 19.Prove that tan^2a – 1 + cos^2a...
December 16, 2012

accounting
1,200;300
December 13, 2012

geometry
in DEF, DE=5 and M,D=55. find the nearest tenth
December 10, 2012

physics
20m
December 9, 2012

chemistry
please explain How % errors would affected the mass/moles of substances in lab?
December 9, 2012

SCI/275
Compare and contrast the western world view with the deep ecology world view. Challenge one of the world views presented in Visualizing Environmental Science. Which world view is closest to your own? Why?
December 6, 2012

social studies
What were the three major cities in the Islamic world?how did each develop and grow to become important?
December 3, 2012

problem solving
An average-size female spider and a large spider can lay a total of 2100 eggs at one time. the large spider lays 20times the number of eggs as the average-size spider. how many eggs does the average sized spider lay
November 13, 2012

Algebra
5-(7/6x)> 7 Subtract both sides by 5 -(7/6x) > 7-5 -(7/6x) > 2 Multiple both sides by -(7/6x) < 2-(6/7) (1/x) < -12/7 x < -7/12 Correction
November 9, 2012

Algebra
5-(7/6x)> 7 Subtract both sides by 5 -(7/6x) > 7-5 -(7/6x) > 2 Multiple both sides by -(7/6x) < 2-(6/7) (1/x) > -12/7 x > -7/12
November 9, 2012

college algebra
The answer is 3. Since the y = -√(x+2) - 9 (-) means reflect by x-axis -9 means 9 units down +2 means shift left 2 units The sign makes a difference For shift if its negative it shift right and positive left.
November 9, 2012

chem
why is hydrogen gas placed in the 1A column of the periodic table?
November 8, 2012

math
Jack and Jill wash a car at the same rate . Working together it takes them an hour and 10 minutes to wash a car. One day jack started washing a car by himself at 2:30 p m. When he was half way done , Jill joined him . What time did they finish washing the car?
November 7, 2012

math
- Juwan and Jake both have money in their pockets. If Juwan gave Jake 15 cent then they both would have the same amount of money. However, if Jake gave Juwan 15 cent , then Juwan would have 5 times as much money as Jake would have. How much money do Juwan and Jake have ...
November 7, 2012

Math
17x*3 =75
October 17, 2012

math
Wat is the number sequence for 16 18 20 22 24 26 28 30 32 34 36 38 40 42
October 16, 2012

math
i got b. and got it wrong
October 15, 2012

math
The scatter plot shows the study times and test scores for a number of students. How long did the person who scored 81 study? A. 50 minutes B. 81 minutes C. 16 minutes D. 100 minutes helppppppp!!!!!
October 15, 2012

Math
Can someone help me with this math problem? 14 divided by 2 1/3
October 9, 2012

Physics
For mass 1, Set up your x coordinate so that Tension is in the positive, and so that the Force of Friction and the x component of weight is in the negative. No other forces exist in the x. Set up your y coordinate perpendicular to the surface of the ramp. Make the normal force...
September 26, 2012

math
on the 1st problem i dont understand how x is being added when the sign is subtraction
September 25, 2012

math
d+3(d-4)=20 please explain
September 25, 2012

math
x-(12-x)=38 please explain
September 25, 2012

math
A college bookstore ordered six boxes of red pens. The store sold 32 red pens last week and 35 red pens this week. Five pens were left on the shelf. How many pens were in each box?
September 24, 2012

algebra
18
August 9, 2012

math
draw a box-and-whisker plot for the following set of data. 62,76,41,87,60,42,47,69,65.
July 22, 2012

ALGEBRA
Yolanda is 180 centimeters tall. How many meters tall is that?
July 2, 2012

mechanics
if a man moves up the escalator and the escalator moves down he has, for example, Vm/g=2stair/s and the escalator has Ve/g =1stair/s, so we have resultant velocity =3stairs/s. Now, assume that as the escalator is not moving man´s Vm/g moving up is 20stairs/s. So the man&...
July 1, 2012

CHEMISTRY
HOW MANY GRAMS OF ice at 0oc can be melted into water at 0oc by the additon of 75.0 of heat ? hfus = 6.01 kj/mo
May 31, 2012

angular momentum
a 8.20 kg particle P has a position vector of magnitude 6.90 m and angle θ1 = 42.0° and a velocity vector of magnitude 6.70 m/s and angle θ2 = 25.0°. Force , of magnitude 8.90 N and angle θ3 = 28.0° acts on P. All three vectors lie in the xy plane. ...
May 30, 2012

chemistry
the volume of a gas is 250 mL at 350 kPa pressure. what will the volume be when the pressure is reduced to 50 kPa, assuming the temperature remains constant?
May 30, 2012

math
three coins, a half-dollar, quarter, nickel are tossed at the same time. to say that there is an outcome xyz means that the half-dollar, landed x, the quarter landed y, and the nickel landed z. the eight equally likely possibilites can be listed as follows: HHH HHT HTH HTT THH...
May 14, 2012

science-biology
what do cells do?
May 12, 2012

Psyc Research Methods
Yes, there is
May 2, 2012

Physics
The acceleration should come out as 0.1g actually. So, v = sqrt(2*a*s) = sqrt(2*0.1g*1) = 1.40m/s
April 18, 2012

Applied physics
two men are carrying a 12m uniform ladder on their shoulders. Man A is 1.0m from one end, and man B is 3.0m from the other end. If the beam has a mass of 200kg, determine the load supported by each man.
March 31, 2012

chemistry
Jessica's teacher has asked her to bring her 0.40 moles of sodium chloride to the laboratory. She should bring approximately _______ grams.
March 29, 2012

Biology
Spermatozoa and Oocytes... I thnk it should be that..
March 24, 2012

Math
For a particular mass of gas, the volume (Vcm^3) and pressure (Pcm) of mecury (Hg) are related by P=kV^n, where k and n are constants. Reduce the relation to a linear one and determine the values of k and n given that when v=110cm^3, P=50.3cm and when V=230cm^3, P=18.6cm
March 24, 2012

Math
For a particular mass of gas, the volume (Vcm^3) and pressure (Pcm) of mecury (Hg) are related by P=kV^n, where k and n are constants. Reduce the relation to a linear one and determine the values of k and n given that when v=110cm^3, P=50.3cm and when V=230cm^3, P=18.6cm
March 24, 2012

Physics
A car starts from rest and accelerates uniformly to a speed of 50km/h in 18s. If the wheels of the car are 70cm in diameter. Calculate; a.The final angular velocity of the wheels b.angular acceleration
March 22, 2012

Physics
A mass m=400g hangs from the rim of a wheel of radius r=15cm. When released from rest, the mass falls 2.0m in 6.5sec. Find the moment of inertia of the wheel
March 21, 2012

applied physics
you are standing on a 100m tall buiding above a street and your friend is standing vertically below the building. When you drop a stone, your friend simultaneously throws the identical stone as yours at a speed of 50m/s in the same straight line. Calculate the time taken for ...
March 18, 2012

Geometry
A grid shows the positions of a subway stop and your house. The subway stop is located at (7, -6) and your house is located at (-9, 5). What is the distance, to the nearest unit, between your house and the subway stop
March 14, 2012

physics
a girl lifts a 160-n load a height of 1 m in a time of 0.5 s. what power does the girl produce
March 14, 2012

applied math
Sorry Orbital speed
March 13, 2012

applied math
if the mean radius of the moon is 1.73x10^6m and its mass is 7.35x10^22kg.determin the average speed?
March 13, 2012

applied chemistry
a 69.3g sample of oxalic ac acid, H2C2O4, was dissolved in 1.000L of solution. How would yo prepare 1.00L of 0.150M H2C2O4 from this solution?
March 8, 2012

applied chemistry
M = 0.0285 mols/0.050 L M = 0.57 mols/L thanks i now know the formular bt hey how would u define Molarity and in what part of living does it apply? Am trying to understand it.
March 7, 2012

applied chemistry
A 50.0mL volume of AgNO3, solution contains 0.0285 mol AgNO3 (SILVER NITRATE). What is the molarity of the solution?
March 7, 2012

MATH
So the answer is X=67
February 20, 2012

Math
Find the volume of the solid generated by revolving the region bounded by y= 5 cosh (x) and y= 5 sinh (x) between x = 0 and x = 1 about the x-axis
February 10, 2012

Language arts and writing
The first compact microwave ovens were sold in 1960. Everybody didn't use them until the 1980's.
February 6, 2012

chemistry
Hey, if all hope is lost try this...let me know if it makes sense.... use stoicheometry. (287 amu of Li/ 1 )*( 1 mol/ 6.02 x 10^23) * ( 6.94g Li/ 1 mol) this makes more clearer as fractions on paper....hope this helps. i did this and got 3.31 x 10^-21. (numbers may vary ...
January 3, 2012

Math
X=x^2+3x-10. Graphed as a parabola Include the x,y table please. And line of symmetry.
December 7, 2011

Math
4x^2-4 radical3x +3=0 Using quadratic formula
December 4, 2011

physics
im not even good
December 3, 2011

Math
9t^2-3t=0. Solve using quadratic formula
December 1, 2011

geometry
If AC is 50 feet, and AB is 40 feet, which is the length of BC?
November 29, 2011

algebra
the volume of a cylindrical tank is V(h)= pi(h^3+6h^2+9h) The volume of a tank can be modeled by V(L)= L(L-3.2)(L+6.8)
November 12, 2011

calculus
Why do we end up with f(x) instead of f(t) on the second fundamental theorem of calculus?
November 7, 2011

calculus
Why do we end up with f(x) instead of f(t) on the Second Fundamental Theorem of Calculus?
November 7, 2011

algebra
b) The sales representative later indicates that there are two and one quarter as many homes available with the first floor plan than the second. Write an equation that illustrates this situation. Use the same variables you used in part a. Express the answer with decimal ...
October 30, 2011

Physics
For mass 1, Set up your x coordinate so that Tension is in the positive, and so that the Force of Friction and the x component of weight is in the negative. No other forces exist in the x. Set up your y coordinate perpendicular to the surface of the ramp. Make the normal force...
October 12, 2011

Physics
dafuq
October 1, 2011

Physics
A 61 kg skateboarder wants to just make it to the upper edge of a "quarter pipe", a track that is one-quarter of a circle with a radius of 2.89 m. What speed does he need at the bottom?
September 29, 2011

physics
A driver traveling at 25 mph in a school zone can brake to an emergency stop in 8 ft. Under similar conditions, what would be the braking distance if the car were traveling at 40 mph?
September 12, 2011

Math
How to find the missing values 0.38=(3*0.1)+(_*_)
September 6, 2011

verbs
thanks
August 2, 2011

verbs
enjoys
August 2, 2011

verbs
what are the verbs
August 2, 2011

verbs
kris enjoys action movies at the theatre
August 2, 2011

chemistry
Calculate the relative molecular mass of a gas if a 500cm3 sample at 20¢ªC and 1 atomic mass of 0.66g
June 21, 2011

government
idk
June 14, 2011

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