# Posts by Jack

Total # Posts: 1,773

trig
The height should be somewhere around 4.5

trig
In this problem use Sin functions to solve. Sin(90) / 5 and set that equal to... Sin(65) / x and see what you come up with

chemistry
I would love help on trying to start this problem?

chemistry
okay thank you very much for helping me and everyone else that asks questions on here I think you did a really good job answering my questions and I will keep what you said about the molar mass and the atomic masses in mind for next time. Again I can't thank you enough.

chemistry
Is that the correct answers?

chemistry
okay I think I got, I got 7.1 x 10^-7 for part a, and I got for part b that they should be the same, and for part c I got 3.7 x 10^4, and finally for part d I got since 1.1 x 10^-8 is greater than 5.0 x 10^-13 a precip will form.

chemistry
so in the ICE box when you are solving for "x" am I supposed to use the Ksp for the solid

chemistry
Okay thank you

chemistry
I don't understand how to set it up and get started on the problem and this is a problem that our teacher gave us for practice for the AP Chem exam

chemistry
Several reactions are carried out using AgBr, a cream-colored silver salt for which the value of the solubility product constant, Ksp, is 5.0 x 10-13 at 298 K. a) Calculate the value of [Ag+] in 50.0 mL of a saturated solution of AgBr at 298 K. b) A 50.0 mL sample of distilled...

Science
A is right

math
If Someone estimatesthat their book bag weighs 8.5 pounds and actually weighs 11 pounds what is the percentage error

Science
It was c wasn't it

math
-230 this is because any numbers absolute value is that number with nothing els so a negitive is not a negitive it is positive and a positive is still positive

biochemistry
How to prepare 2L of 5.5M HCL solutions from scratch

math
First of all, lets note what the formula is. A=bh or lw 25 is the width so lets plug it in. 25w=150+175t Next, you evaluate that by Isolating the "w". Divide the 25 by 25 and divide 150+175t to get 6+7t Get rekt noob........

physics
bobpursley answer is correct for the first one but for b there is a vertical force of 9.81 because of the gravitational force

Social Studies
The people of Brazil can best be decribed as A Primarily indigenous in descent B largely of the white European ancestry C mestizos with shared-indigenous heritages <--- c is my answer D mixed race with native, African, and European roots.

Social Studies
The people of Brazil can best be decribed as A Primarily indigenous in descent B largely of the white European ancestry C mestizos with shared-indigenous heritages <--- c is my answer D mixed race with native, African, and European roots.

biology
hi, I am studying for an exam and I am trying to really understand the processes of things. So, in a cardiac muscle (everything else normal) what would happen if sympathetic stimulation does not lead to the phosphorylation of Troponin-I? I am asking specifically in regards to ...

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

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...

Algebra
1. C 2. B 3. A 4. D 5. D 6. A 7. D 8. The area of the shaded region will be the area of the rectangle minus the area of the white square inside of it: ((x+10)(2x+5)) - ((x+1)(x+1)) First, FOIL both of the areas separately: (2x^2 + 5x + 20x + 50) - (x^2 + x + x + 1) Simplify ...

social studies
What are some advantages and disadvantages of a reorganized family

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?

Physics
12.4

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.

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 ...

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

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?

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

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, ...

math
Karen collects local and foreign coins. Of the coins in her collection, 1 4 are foreign coins. Of the foreign coins, 2 5 are from Mexico. What fraction of the collection are foreign coins that are not from Mexico?

Socials Studies
Toussaint Louverture was immortalized in sonnet by the British poet Wordsworth

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

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?

math
why do you always mind this person's business ms.sue?

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?

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/...

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 ...

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

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...

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?

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

Math Help!
2/3(k+8)=52

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.

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 ...

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

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

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?

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

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.

science
which of the following is true about the magnetic field diagram below

English
i hope that helps

English
somebody help i am new's answers are correct i got them all right

math
21

math
the product of my digits is an even number the sum of my digits is < 100

statistics
VGFIHTRNHKJ

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

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?

Science
I AM A CHEESE PIE

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

Science
WTF does that mean, I would agree you said, yes or no,?

Trigonometry
158

Materials Science
can you share the source of this question?

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.)

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

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 ...

Algebra 1
EXCELLENT. Thanks much.

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.

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

Algebra 1
Can you PLEASE elaborate ?

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

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

science
I think it's pronounced You're

science
By the way the answer is B

science
Ms.Sue um are you ok

Math
How many tenths are there in 4/5?

History
Ms.Sue, You are extremely unhelpful. You're also quite rude, Please do go back to mannerism school.

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...

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 ...

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

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

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 ...

math
15

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

Math
Convert from AUD to EUR, than EUR to USD.

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.

physics
Well i put generators and television for electricity & magnetism

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.

English
#2

English
#1

English
#3

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

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?

mathematics
Write down algebraic expression for thabo's age in 6 year's time

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?

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 ...

Calc