Thursday
February 26, 2015

Posts by JACK


Total # Posts: 1,382

chemistry
PLZ help me understand the way of solving this equation quick A 0.07 mol sample of octane C8H18 absorbed 3.5*10^3 j of energy. calculate the temperature increase of octane if the molar heat capacity of octane is 254.0 j/k*mol
February 21, 2015

biology
I need help on the following: Imagine that a motor unit, with its nerve intact, is placed in a solution that is calcium-free (but has the proper ionic strength – don’t worry how). Further imagine that the ends of the muscle fibers in the motor unit are held such that...
February 13, 2015

social studies
What are some advantages and disadvantages of a reorganized family
February 11, 2015

Icp
A student is helping her teacher move a 9.5 kg box of books. What net sideways force must she exert on the box to slide it across the floor so that it accelerates at 1.0 m/s2?
February 11, 2015

Physics
A bowling ball of mass 3.5 kg moves in a straight line at 4.48 m/s. How fast must a Ping-Pong ball of mass 3.456 g move in a straight line so that the two balls have the same momentum? Answer in units of m/s.
February 6, 2015

physics
A wheel has a rotational velocity of 18·rad/s counterclockwise. You place you hand against the wheel and the friction between your hand and the rim stops it. (a) If it takes 4·s to stop the wheel, what is its rotational acceleration? rad/s2 (b) How far does the ...
February 6, 2015

Socials Studies
what did the monarch who replaced napoleon in 1813 want to revive how did it affect the people of france
January 20, 2015

Socials Studies
What was the outcome of the five year war between France and Spain and What country did Spanish troops ally with to fight napoleon's grand armee?
January 20, 2015

physics
A ball is thrown straight up and reaches a maximum height of 6.57 m . What was its initial speed? The accelera- tion of gravity is 9.8 m/s2 . Answer in units of m/s
January 15, 2015

physics
A 25.7 kg mass attached to a spring scale rests on a smooth, horizontal surface. The spring scale, attached to the front end of a boxcar, reads T = 47.6 N when the car is in motion. If the spring scale reads zero when the car is at rest, determine the acceleration of the car, ...
January 15, 2015

Socials Studies
Toussaint Louverture was immortalized in sonnet by the British poet Wordsworth
January 12, 2015

chemistry
What volume of 1.34 mol/L hydrochloric acid, HCI, is expected to react completely with 6.89 g of calcium?
January 12, 2015

Math
Eighty metres of fencing are available to enclose a rectangular area. What are the dimensions that enclose the max area. What is max area?
January 2, 2015

math
why do you always mind this person's business ms.sue?
December 26, 2014

Physics
A 2.13 kg mass is suspended from a string which is pulled upward. The mass accelerates upwards with an acceleration of 3.10m/s2. What is the tension in the string?
December 16, 2014

Physics
A 1250 kg car traveling at 20 m/s suddenly runs out of gas while approaching the valley shown in the figure below. What will be the car's speed as it coasts into the gas station on the other side of the valley? (Assume that no energy is loss to friction.) file://dd-s-1/...
December 10, 2014

Physics
A weight of 690 N is held by two cables. The left-hand cable had tension T2 and makes an angle of 41◦ with the ceiling. The right-hand cable had tension T1 and makes an angle of 42◦ with the ceiling. What is the tension in the cable labeled T1 slanted at an angle ...
December 8, 2014

english
Lennie thinks Crooks is trying to scare him and gets becomes defensive saying "George will come back"
December 8, 2014

physics
A ball player hits a home run, and the baseball just clears a wall 17.6 m high located 122.0 m from home plate. The ball is hit an an angle of 35° to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1.1 m above the ground. (a) What is...
November 24, 2014

Physics
A 0.118 kg baseball traveling with a horizontal speed of 3.14 m/s is hit by a bat and then moves with a speed of 33.7 m/s in the opposite direction. What is the magnitude of the change in the ball's momentum?
November 23, 2014

math
Two sides of a rectangular fence are 5 5/8 feet long The other two sides are 6 1/4 feet long. what is the perimeter
November 23, 2014

Math Help!
2/3(k+8)=52
November 19, 2014

math
What is the GCF of 8 and 24? What is the LCM of 8 and 24?Write the sum of 8 + 24 as the product of its GCF and another sum.
November 16, 2014

Physics
Mary if riding her bike at a constant velocity of 10.2m/s. Suddenly someone jumps in front of her, 6 meters ahead of her. The coefficient of friction is 0.35, and her total mass is 130kg. She slams the breaks with 800N of force. Will she be able to stop in time? I heard that ...
November 13, 2014

L.A.Help!!!!!!
the answers for the whole quiz is 1. c 2. d. 3. b
November 13, 2014

EDTECH
UNIT 4 lesson 4 All of this information is part of a ___ in a database. a. record b. row c. column d. field What other information do you need to add to complete the database above? a. cell fill color b. fields c. field names d. borders
November 13, 2014

science
What would you need to know to determine the total amount of photosynthesis going on in the canopy and near the forest floor? Why?
November 7, 2014

language arts
according to harriet tubman, what was thomas garrett's role in the underground railroad
November 6, 2014

Algebra
Angle A is three times the measure of angle B. The sum of their measures is 128 degrees. Angle B is (x + 2) degrees. Find the value of x.
October 30, 2014

science
which of the following is true about the magnetic field diagram below
October 27, 2014

English
i hope that helps
October 26, 2014

English
somebody help i am new's answers are correct i got them all right
October 26, 2014

math
the product of my digits is an even number the sum of my digits is < 100
October 20, 2014

statistics
VGFIHTRNHKJ
October 20, 2014

Biology
For yogurt, draw a representative molecule of amino acids it contains.
October 20, 2014

Biology
Yogurt contains fats, cholesterols, carbohydrates(fibre, sugar and starch) and protein. For each of the nutrients that this food contains: Explain how the molecule's structure fits it function?
October 20, 2014

Physics
An apple falls from a tree and hits the ground 8.83 m below. With what speed will it hit the ground? The acceleration of gravity is 9.8 m/s2 . Answer in units of m/s
October 9, 2014

algebra
HEY IM FROM GERMANY!!!!!! YYAAAAAhhhahhahahhahahahh
October 6, 2014

physics
A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 19.0m/s when the hand is 1.50m above the ground. How long is the ball in the air before it hits the ground? (The student moves her hand out of the way.)
September 26, 2014

Algebra 1
A student reads an average of 34 pages per day. The number of pages she reads per day varies from the average by up to 8 pages. a. Write an absolute value inequality that represents the range of the number of pages she reads per day. b. Solve your inequality
September 25, 2014

Algebra
In a sports poll, 53% of those surveyed believe their high school football team will win the state championship. The poll shows a margin of error of +-5 percentage points. Write and solve an absolute value inequality to find the least and the greatest percent of people that ...
September 25, 2014

Algebra 1
EXCELLENT. Thanks much.
September 25, 2014

Algebra 1
In order to earn an A in a class, your test scores must average at least 92%. On the first 6 tests, you have an average of 91%. What score do you need to get on the last test to earn an A? Show your work.
September 25, 2014

Algebra 1
Sorry but how do you know to include 80 and 90. Just cannot understand that part. Thanks much.
September 25, 2014

Algebra 1
Can you PLEASE elaborate ?
September 25, 2014

Algebra 1
I think you are saying option c. But real answer is d. Not sure why.
September 25, 2014

Algebra 1
A teacher knows that 80% of her students will score no more than 5 points above or below the class average, 85%, on the test. Which inequality represents the test scores of 80% of her students? a. 75<A<85 b. 85<=A<=90 c. 80<A<90 d. 80<=A<=90
September 25, 2014

Math
How many tenths are there in 4/5?
September 21, 2014

Finanal
using the maximum ratios for a conventional mortgage, how big a monthly payment could the Burton family afford if their gross (before-tax) monthly income amounted to $3500? Would it make any difference if they were already making monthly installment loan payments totaling $750...
September 18, 2014

physics
A river flows with a uniform velocity v. A person in a motorboat travels 1.11km upstream, at which time she passes a log floating by. Always with the same throttle setting, the boater continues to travel upstream for another 58.8min and then returns downstream to her starting ...
September 14, 2014

math
flossie has $62.05. In quarters, she has 3 more than twice the number of half dollars, and 10 more dimes than quarters. how many of each coin does she have
August 30, 2014

calculus
Not sure what you mean. It says it's in the first quadrant.
August 27, 2014

calculus
1. Let S be the region in the first quadrant bounded by the graphs of y = e^(-x^2) y = 2x^2, and the y axis. y x = 2 , and the y-axis. a) Find the area of the region S. So when I integrate, is it from 0 to .5325? I found where they intersect on the calculator. Is this the ...
August 27, 2014

math
15
August 27, 2014

Math
By the way, you converted AUD to EUR, than apparently EUR back to AUD, yet you have different numbers for AUD...
August 27, 2014

Math
Convert from AUD to EUR, than EUR to USD.
August 27, 2014

physics
Some of the branches of physics that you will study in this course investigate motion, the properties of materials, sound, light, electricity and magnetism, properties of atoms, and nuclear reactions. Give at least one example of an application of each branch.
August 25, 2014

physics
Well i put generators and television for electricity & magnetism
August 25, 2014

physics
Some of the branches of physics that you will study in this course investigate motion, the properties of materials, sound, light, electricity and magnetism, properties of atoms, and nuclear reactions. Give at least one example of an application of each branch.
August 25, 2014

English
#2
August 25, 2014

English
#1
August 25, 2014

English
#3
August 25, 2014

algebra
That's what I tried, but it's wrong. Idk why.
August 22, 2014

algebra
What is the maximum value of c such that the graph of the parabola y = (1/3)x^2 has at most one point of intersection with the line y = x+c?
August 22, 2014

physics
Ok I actually understand part of it now, but why is sin (θ1) used instead of cos? Wouldn't using cos give the horizontal component of F2?
July 21, 2014

physics
Three balanced forces pull on a ring that is centered over a force table. Two forces F1 and F2 are due to weights hanging from pulleys. A frictionless pulley changes the direction of a force without altering its magnitude. The third force F3 is applied by a string that passes ...
July 21, 2014

Reading
we are working togather...Thank you.
July 3, 2014

Reading
Thank you Ms. Sue
July 3, 2014

english
Words to choose from: Credible, Cursory, Designate, Deviate, Improvise, Interim, Latent, Secular, Shun, Simulate…… I remember so well the time my mother’s back injury prevented her from going to church with my brother and me. For five weeks, we were supposed to ...
July 2, 2014

math
Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -6x2 + 3x + 3.
June 19, 2014

Math
The average weight of 3 boys is 53 pounds. Not one of these boys weighs less than 51 pounds. What is the maximum possible weight in pounds, of any one boy?
June 8, 2014

Reading
I was not _______(e)d with athletic ability; mortified or detract
June 4, 2014

CHEMISTRY
given this balance equation, C2H5OH+3O2=3H2O+2CO2 HOW MANY GRAMS OF CO2 ARE PRODUCED FROM 18.5 GRAMS OF OXYGEN GAS?
May 24, 2014

algebra1
did you take the unit test for connexus ?
May 19, 2014

algebra1
Please Help me out if you know this... Simplify. x/7x+x^2 A. 1/7+x; Where x does not equal -7 B. 1/7x; Where x does not equal 0 C. 1/7+x; Where x does not equal 0,-7 D. 1/7
May 19, 2014

Biology
Examining an animal showing juvenile somatic characteristics and sexual maturity, how can you tell if this is the result of progenesisor neoteny?
May 8, 2014

Chemistry
If the solubility constant for Ag2CO3 is equal to 8.1x10^-12 how many grams of Ag2CO3 will dissolve in a .0001 M solution of Na2CO3?
April 17, 2014

Social Studies
What characteristic did the Mauryan and Mughal empires share? -Both helped spread Buddhism -Both helped spread Islam -Both embraced the idea of religious tolerance -Both were begun by Aryan people
April 12, 2014

chemistry
A 4.70 g sample of a certain gas occupies 530. mL at STP. What mass of the same gas is present in a 1.15 L container at 40.5°C and 785 mm Hg?
April 10, 2014

math
simplify 8g^7h^-3 over (like a fraction) 2g^4h^8 a. g³ over 4h^5 b. 4g³ over h^11 c. 4g³h^5 d. 4h^11 over g³ thank you for your help!
April 10, 2014

Physics
A turntable rotates counterclockwise at 63 rpm. A speck of dust on the turntable is at θ = 0.57 rad at t = 0 s. What is the angle of the speck at t = 9.5 s? Your answer should be between 0 and 2π rad.
April 3, 2014

science(check answers)
5 is false
March 31, 2014

science
actually all are correct i got 7/7 correct
March 22, 2014

Math: Thinking Mathematically
Never Mind... I Just figured it out. Thanks Steve for help!!! :D
March 21, 2014

Math: Thinking Mathematically
Hey Steve, I'm also stuck on this problem too. I understand the part about the height being 12 yards since the three cables are attached 4 yards below the top. I can't figure out how you ended up with 15 yards. When you say that the other leg is 9 yards, are you ...
March 21, 2014

Global studies
The indigenous people of British Columbia are famous for carving __________, or tall poles containing the symbols of a particular group, family, or clan. a. monuments b. family pillars c. totem poles *** d. animal columns
March 12, 2014

Algebra
Long Divide: (x^2 + 3x + 5)/ (x + 3) Thanks.
March 4, 2014

Science -Check Answers-
Damon 4 is inertia
March 3, 2014

Finance
2,238.87
February 25, 2014

6th grade social studies
I need help unscrambling these letters to form two words: inenidj tcain They go along with the phrase ______ _____and Persia.
February 24, 2014

Chemistry
If the surface area of a human body is 17,500 square centimeters, what is the total weight of the atmosphere on a human body expressed in pounds?
February 14, 2014

math
Wandy and Paul are saving to buy their home. Wandy saved $16 390 while paul has save $18 000. how more has paul saved. how much altogether?
February 13, 2014

Physics
A football is kicked at ground level with a speed of 17.9m/s at an angle of 39.0∘ to the horizontal. How much later does it hit the ground?
February 5, 2014

spanish
I need hep unscrambling these words can anyone help? 1)GJAUDRO 2)ARBCUE 3)EUPQIO 4)MCLICISO 5)PEASRA 6)NEIST
January 31, 2014

Language Arts (Check answer)
because the story is written as a series of dated reports, we can see that the story is structures according to a. Cause and effect b. Chronological order c. Comparison and contrast d. Problem and solution ***
January 31, 2014

social studies(check answers)
These are all wrong
January 30, 2014

Educational tech (Please check my answers)
Thank you
January 30, 2014

Educational tech (Please check my answers)
Which of the following is an example of safe behavior online? A.) Chatting with someone you have not met before B.) Providing your email address when asked in an IM C.) Leaving your computer open at a public library D.) Communicating with friends on secure websites *** What is...
January 30, 2014

physics
in a experiment to measure the speed of sound in glass, a pulse of sound is sent into a glass rod, 14 m in length. the reflected sound is detected after 5.6 ms (0.0056 s). calculate the speed of sound in glass.
January 19, 2014

physics
thx man
January 18, 2014

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