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Kristin
Questions and answers by
Kristin
Questions (111)
A coiled Hookean spring is stretched 10 cm when a 1.5kg mass is hung from it. Suppose a 4 kg mass hangs from the spring and is
4 answers
3,474 views
I'm taking AP US History so I have a summer assignment. I'm supposed to read The Metaphysical Cub by Louis Menand and write a
1 answer
782 views
I need short definitions for these words be 4 2morrow.
proton- neutron- electron- nucleus- atom- periodic table- atomic number-
1 answer
484 views
Where in the Constitution are judicial nominations described?
What language is used to describe the roll of the Senate in Supreme
4 answers
1,379 views
I am having difficulty writing my essay with collective thoughts that aren't so jumbbled as to the: thesis statement keeping the
1 answer
409 views
I am having difficulty writing my essay with collective thoughts that aren't so jumbbled as to the: thesis statement keeping the
1 answer
475 views
Describe the three key concerns that Washington had for the future of the U.S. Explain how the country has progressed in each
1 answer
522 views
If you were running for President, how might the Sedition Act impact your campaign?
How would YOU answer this question? You might
2 answers
580 views
What is the direct object, indirect object, predicate nomnitive or predicate adjective in the following 2 senteces? 1.It is a
9 answers
688 views
What is the difference in volume (due only to pressure changes, not temperature or other factors) between 1000 kg of water at
2 answers
548 views
Suppose Fred's Computers advertises that their new computer comes with exactly 1,200 megabytes of RAM in main memory. Why is
6 answers
518 views
A rocket with a mass M moves along an x axis at the constant speed vi=40 m/s. A small explosion separates the rocket into a rear
2 answers
1,242 views
does anyone know what the ap exam for gov and pol is like?
1 answer
287 views
is the sentence:
slough is very prominent in many households that are in the slums gramatically correct? how do i use slough in a
7 answers
447 views
Hi, again. I need help with this word
decorum. the def is ADJ proper; seemly correct how do i use this in a sentence?
11 answers
522 views
We are trying to raise money in our high school for children with cancer. Do you have any suggestions as to what we should do?
-D
1 answer
403 views
What did scientist learn from studying Supernova 1987A?
2 answers
498 views
what 2 substances found in my home that could conduct electricity and explain why?
4 answers
463 views
What are the parts of speech to each word in this sentence: I like the movie Clueless its based on Jane Austens novel Emma.
2 answers
970 views
what might be the cause of onset of social fobia in a 19 year old boy?
3 answers
352 views
If an arrow is fired at 200km/h horizontally, about how long will it take to strike a target 30 meters away?
1 answer
423 views
A tennis ball is dropped from the top of a building. It falls for 2.5 seconds before it hits the ground. (a) What velocity is
4 answers
891 views
If you see a lightening bolt, then count 4 seconds until you hear thunder, about how far away was the lightening strike?
3 answers
505 views
Can someone help me solve the following problems using the substituion method? I need to find the ordered pairs and I do not get
6 answers
897 views
Elimination Method....I am not understanding this method either and need some help here is what I am working on:
1) x+8y=33
4 answers
788 views
can someone please help me with this elimination methods problem?
0.05x+0.25y=11 0.15x+0.05y=12 solve using the elimination
3 answers
806 views
1)
6m+n=47 m-4n=12 can someone help me solve using substitution method?
2 answers
674 views
1)
x+8y=33 -x+4y=3 I need help solving this one using the elimination method!
1 answer
433 views
The solubility of compounds containing the carboxylic acid group can be increased by reaction with
a) sulfuric acid b) nitric
2 answers
624 views
The solubility of compounds containing the carboxylic acid group can be increased by reaction with
a) sulfuric acid b) nitric
4 answers
2,066 views
I'm trying to find the solubility of Ca(OH)2 in .0125 mol/L aqueous NaOH. Here is my data:
Vol of solution used per titration:
6 answers
2,763 views
Directions: We recently watched the movie "Schindler's List," and now we have to write an essay. So I chose to write it based on
10 answers
643 views
The informant, who will not be named, called in a tip last night informing police officers about an attempted robbery.
The cold,
1 answer
323 views
The standard enthalpies of formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of zero to H
4 answers
1,343 views
Explain the Difference during the Roman Empire on what Augustus says about himself and what Tacitus says about Augustus
6 answers
537 views
An urn holds 13 identical balls except that 2 are white, 4 are black, and 7 are red. An experiment consists of selecting two
2 answers
1,182 views
An urn holds 13 identical balls except that 2 are white, 4 are black, and 7 are red. An experiment consists of selecting two
1 answer
732 views
I don't understand how you know what state designation things are in a chemical equation. For example this is given:
2 (NH4)3PO4
1 answer
464 views
Find a rule that gives the third number from the first two numbers. Fill in the blanks.....10, 4, 5, ? 15, 7,7, ? 19,9,?
1 answer
463 views
at 1 atm how much energy is required to heat 67 grams of H2O(s) at -22 degrees C to H2O(g) at 159 degrees C
2 answers
510 views
The function f is continuous on the closed interval [0,6] and has values that are given in the table below.
x |0|2|4|6
4 answers
6,809 views
you have 47 mL of a 2 M stock solution that must be diluted to .5 M how much water should you add
1 answer
442 views
write the balanced equation for the ionization of the weak base pyridine, C5H5N, in water
8 answers
35,459 views
An intrepid explorer takes 400 g of ice from the cold Siberian environment, where the temperature is –40 degrees and places it
2 answers
1,096 views
When 0.100 mol of carbon is burned in a close vessel with 8.00g of oxygen, how many grams of carbon dioxide can form?
1 answer
428 views
Bethany has 40 apples. Write a subtraction story about the apples that would require regrouping. Then write the answer in a
5 answers
803 views
To subtract 91 from 99, do you need to regroup? Explain
4 answers
806 views
To subtract 91 from 99, do you need to regroup? Explain
1 answer
418 views
The position vector r of a particle moving in an xy plane is given by [r = (6t^3-3t)i + (4-1t^4)j] with r in meters and t in
1 answer
1,156 views
find the coordinates of the terminal point on the unit circle determined by t=9pt/7 to two decimal places
4 answers
1,352 views
If solution A had a pH of 8, and solution B had 1,000 times this hydrogen ion concentration what would be the pH of solution B,
3 answers
1,483 views
Suppose D=(w+2)(w-3)(w+6).For what three values of w will D have a value of 0?
1 answer
413 views
suppose you have 2 cars, and the larger one is twice as massive as the smaller one. If you and a friend push on them so that
4 answers
860 views
What is the transfer mechanism of energy, momentum, and angular momentum?
1 answer
362 views
This is part of a marathon problem, we have to identify the five compunds of H, N, and O described below. For each compound, I
2 answers
644 views
A driver in a car traveling at a speed of 56.0 mi/h sees a deer 116 m away on the road. Calculate the minimum constant
2 answers
565 views
X^2-4x=0
1 answer
238 views
Factor 15x^2 - 8x - 16
2 answers
504 views
If a projectile is launched from Earth with a speed equal to the escape speed, how high above the Earth's surface is it when its
2 answers
1,112 views
A 3.30-kN piano is lifted by three workers at a constant speed to an apartment 28.8 m above the street using a pulley system
3 answers
1,184 views
If you reclaim 0.250g Ag from AgNO3, how much AgNO3 did you have to begin with?
1 answer
404 views
I am having trouble with a question.
In order to get an idea of significant subject areas in a chapter, it is best to read the.
4 answers
472 views
100 ml of 0.01N HCl is added to 0.9L of distilled water. What would the final pH of the solution be?
1 answer
415 views
A rock sample contains only Sb2S3 and FeS. If 835g of the sample contains 11.2% antimony, what is the mass percent of the Sb2S3
2 answers
665 views
Suppose that a tour bus business incurred implicit costs of $600,000 and explicit costs of $7 million in a specific year. If the
1 answer
527 views
2. If a firm increases all of its inputs by 60 percent and its output increases by 90 percent, then you know that:
A) it is
1 answer
523 views
How did england change after its war with spain? and How did this change played a role and part in history by analyzing the
1 answer
436 views
The average temperature in households is 67.6 degrees F. The standard deviation is 4.2 degrees F. A random sample of 51
2 answers
495 views
Jack has the following scores on exams in his math class.
81, 87, 93, 89, 61, 81 If he wants to make his performance sound as
38 answers
7,640 views
Patsy has cheerleading practice on every fourth school day. She wants to be in the school play, but they have practice on every
6 answers
1,374 views
The focal length of the objective of a telescope is 0.2 m and the eyepiece has a focal length of 1.6 m. What is the length of
2 answers
876 views
Caculate the volume of CO2 gas given off at 756 mm Hg and 23C when 150 kg of limestone(CaCO3) is heated until it decomposes
3 answers
589 views
Meg's pension plan is an annuity with a guaranteed return of 4% per year (compounded quarterly). She would like to retire with a
1 answer
899 views
a. How many atoms of hydrogen are in 25.0 g of ammonia (NH3)? Use the format 6.02E+23 for 6.02 x 1023
b. How many atoms of
1 answer
476 views
What mass of copper(II) nitrate would be produced from the complete reaction of 65.3 g of copper, according to the chemical
2 answers
765 views
Anhydrous aluminum oxide can be reduced to aluminum according to thisa chemical equation: 2 Al2O3 (s) ---> 4 Al (l) + 3 O2 (g)
3 answers
587 views
Two 75 kg hockey players skating at 5.50 m per s collide and stick together. if the angle between their initial directions was
3 answers
1,462 views
If you put me into 7 equal groups with 3 in each group and 5 are left over, what number am I?
1 answer
470 views
XYZ has vertices X(5,6), Y(9,12), and Z(12,8). it is translated right 8 units and up 3 units. What are the coordinates of X',
6 answers
2,789 views
The point Q(x,y) is reflected in the origin. Use arrow notation to describe the original point and its reflection.
I chose this:
4 answers
569 views
Is the proportional?
x: 1 3 4 6 y: -4 -12 -16 -24 I think it is. Am I correct?
1 answer
308 views
A movie complex has eight different movie theaters. The manager of the complex wants to conduct a survey to determine which
4 answers
1,510 views
Find the volume of the solid generated by rotating about the y axis the area in the first quadrant bounded by the following
4 answers
2,767 views
A fragment of bone is discovered to contain 20% of the usual carbon-14 concentration. Estimate the age of the bone to the
4 answers
1,415 views
1/X by first principles
5 answers
512 views
find the co-ordinates
y=x(2-x) where the gradient is 2
3 answers
367 views
2x
-------- (x-2)(x+2) using partial fractions That's supposed to be a division sign of some sort
1 answer
436 views
(7x^2+3x+9)+(2x^2+5x-2)
1 answer
302 views
Mallory has a credit score of 680 and she is offered and interest rate of 8.3%. is this a good offer? Explain your answer.
1 answer
359 views
A 0.205 kg bird flying along at 7.8 m/s sees a 0.029 kg insect heading straight toward it with a speed of 15 m/s (as measured by
2 answers
651 views
The ethylammonium ion, CH3CH2NH3+, has a pKa of 10.81. It reacts with water to form ethylamine, CH3CH2NH2 and H3O+.
Which of the
3 answers
2,013 views
The Ka for the reaction of acetic acid and water is 1.8 x 10-5.
Which of the following statements is true at pH 7? A.) there is
2 answers
720 views
Four sets of conjugate acid/base pairs and Ka of the acid are given. Which pair would be the best to form a buffer at pH = 9.2?
4 answers
628 views
How many moles of chlorine are there in 16.0 mL of 0.450 M CaCl2?
0.0072 mol 0.0144 mol 0.0216 mol 0.0375 mol none of the above I
4 answers
566 views
What is the pH of a solution which has hydroxide concentration, [OH-], equal to 7.6 x 10-4 M?
0.88 3.12 10.9 13.1 none of the
1 answer
444 views
Calculate the hydronium ion concentration of blood which has a pH of 7.24.
7.17 x 10-4 M 5.75 x 10-8 M 1.15 x 10-7 M 0.86 M none
4 answers
1,522 views
In a solution of a weak acid and its conjugate base, which condition has to be true for pH to equal pKa?
The concentration of
4 answers
486 views
You attach one end of a spring with a force constant
k = 893 N/m to a wall and the other end to a mass m = 2.02 kg and set the
4 answers
1,891 views
The top of a tree makes angles s and t with Points K and L on the ground, respectively, such that the angles are complementary.
4 answers
4,781 views
A block of mass 8.60 kg is pulled along a horizontal frictionless surface by a cord that exerts a force of 33 N at an angle
2 answers
509 views
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