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hannah
Questions and answers by visitors named
hannah
, page 3
Questions (468)
How many innocent South Vietnamese citizens were killed during the Vietnam war?
1 answer
353 views
i need help depicting a poem using literary terms. The poem is Dear Sister and goes:
Do not believe what all you read in the
1 answer
455 views
HELP PLEASE! I don't understand how to do the problem! Please help thanks(:
The problem is: your bike tire has a radius of 14
1 answer
418 views
is increasing the current a valid method to increase the induced voltage when a magnet moves into a solenoid?
1 answer
319 views
As the mass of the particle is increased while the speed of the particles remains the same, would you expect the bending to
4 answers
1,604 views
solve for the equation or formula for the specified variable
x+y-a=b,for y over Z
1 answer
353 views
Cobalt-60 is a strong gamma emitter that has a half-life of 5.26 yr. The cobalt-60 in a radiotherapy unit must be replaced when
4 answers
3,270 views
Each beta particle has an energy of 2.51 10-14 J, and 7.5% of the radiation is absorbed by the person. Assuming that the
2 answers
512 views
The narrator points out that Emily, who has only recently blossomed, struggled with her appearance in the past.
What this means..
1 answer
313 views
the world record for the 100 meter butterfly swim set in 1999 was 51.81 sec. What was the average rate per second? thx:)
1 answer
406 views
Do veterinarians get paid during residency? If so how much?
4 answers
271 views
identify the functional group and indicate polar bonds by assigning partial positive and negative charges.
1) The structure
1 answer
419 views
I am trying to figure out what functional group the compound CH2ClCH3 is in.
I know that it is not a ketone, alcohol, ester,
1 answer
428 views
identify the functional group and indicate polar bonds by assigning partial positive and negative charges.
1) The structure
2 answers
483 views
I am trying to figure out what functional group the compound CH2ClCH3 is in.
I know that it is not a ketone, alcohol, ester,
3 answers
1,025 views
what is the purpose of the labor law- executive order- created in 1965
2 answers
745 views
When is the best time to read review or discussion questions?
A. Immediately after you have finished all of the reading. B. After
2 answers
594 views
(a) When a 4.75-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter (see figure), the
2 answers
606 views
Set up a Hess's law cycle, and use the following information to calculate ÄH°f for aqueous nitric acid, HNO3(aq). You will
3 answers
757 views
Consider the following equations.
N2H4(l) + O2(g) N2(g) + 2 H2O(l) ÄH = -622.2 kJ H2(g) + 1/2 O2(g) H2O(l) ÄH = -258.5 kJ H2(g)
5 answers
1,263 views
Consider the following equations.
N2H4(l) + O2(g) N2(g) + 2 H2O(l) ÄH = -622.2 kJ H2(g) + 1/2 O2(g) H2O(l) ÄH = -258.5 kJ H2(g)
4 answers
787 views
a chemist puts 6 moles of nitrogen gas and 7 moles hydrogen gas into an evacuated 1 liter container. The system reaches
2 answers
916 views
i am writing a literary research paper on the book robinson crusoe. my thesis is In "Robinson Crusoe" Daniel Defoe uses the
2 answers
977 views
A projectile is launched off of a 18.6 m high cliff with a velocity of 12.8 m/s. If the projectile is launched at an angle of
1 answer
532 views
if 3 bananas cost £1.14 how much will 5 of them cost? and how do ypu work it out?
1 answer
308 views
if 3 bananas cost £1.14 how much will 5 of them cost? and how do ypu work it out?
1 answer
297 views
if 3 bananas cost £1.14 how much will 5 of them cost? and how do ypu work it out?
3 answers
910 views
about 7x10 to the power of 3 babies are born each day in the city. about how many babies are born each day in the city?.give the
2 answers
489 views
what is the meaning of fertilization?
4 answers
710 views
a parking meter gives 30 minutes for each quarter and 6 minutes for each nickel. the equation 30x+6y=60 describes the number of
3 answers
2,200 views
why are cultivation practices for pest control not widely used today?
4 answers
441 views
I don't know how to change 1/3 and 2 1/3
into a decimal and still show my work
4 answers
840 views
how did the invention of the microscope help doctors to understand what caused diseases.
1 answer
351 views
please help solved the following fraction
11 13/15 + 3 7/12 = 14 3/4 + 7 + 5 7/8 = Thanks, Hannah
10 answers
209 views
10+2n=8n-8(+8)
1 answer
180 views
NH4HS(s) <-> NH3(g) + H2S(g)
An equilibrium mixture of this reaction at a certain temperature was found to have (NH3)=.268 and
2 answers
1,119 views
NH4HS(s) <-> NH3(g) + H2S(g)
An equilibrium mixture of this reaction at a certain temperature was found to have (NH3)=.268 and
3 answers
661 views
In a thundercloud there may be an electric
charge of 54 C near the top of the cloud and −54 C near the bottom of the cloud. If
4 answers
1,247 views
a bowling lane is 16.5m long. A young bowler throws a strike and hears the pins striking the floor 4.1 seconds after releasing
2 answers
524 views
a bowling lane is 16.5m long. A young bowler throws a strike and hears the pins striking the floor 4.1 seconds after releasing
1 answer
439 views
a flowerpot falls from a window ledge far above the street. Some distance down, phil fizyks observes that the pot takes 0.25
3 answers
735 views
What is atmospheric pressure?
A. Pressure of the air inside the body B. Pressure of the air outside the body C. Pressure of the
3 answers
649 views
Calculate the pH of each of the following strong acid solutions.
0.697 g of HClO3 in 2.97 L of solution. so i convenrted grams to
3 answers
519 views
Calculate [OH- ] and pH for each of the following strong base solutions. (Kw = 1.0 10-14.)
3.155 g of KOH in 460.0 mL of
1 answer
419 views
Phenylacetic acid (C6H5CH2COOH) is one of the substances that accumulates in the blood of people with phenylketonuria, an
4 answers
3,406 views
hi my name is Hannah and I need help with my math homework it is something to do with multiplying trapezoids and triangles?
5 answers
336 views
An ocean wave travels 17.1 m in 6.7 s. The
distance between the two nearest wave crests is 5.1 m. What is the frequency of the
2 answers
967 views
For each of the following reactions, predict whether the equilibrium lies predominantly to the left or to the right.
HCN(aq) +
4 answers
938 views
Ecological ________ - normal, gradual changes that occur in the types of species that live in an area.
Help please and help me
1 answer
401 views
Indicate whether the pH increases, decreases, or remains the same when each of the following is added.
(CH3NH3)Cl to a solution
3 answers
739 views
Acetic acid, CH3CO2H, is the active ingredient in vinegar. It's often abbreviated "HOAc". Vinegar is acidic because acetic acid
5 answers
850 views
What CH3COONa concentration is required to prepare a buffer solution with a pH of 4.80 if [CH3COOH] = 0.150 M? Ka of CH3COOH =
5 answers
797 views
How many grams of NH4Cl must be added to 0.560 L of 1.90 M NH3 solution to yield a buffer solution with a pH of 8.50? Assume no
5 answers
3,419 views
If the intensity of a person’s voice is 3.6×10−7
W/m2 at a distance of 2.1 m, how much sound power does that person
1 answer
673 views
Why is an echo weaker than the original
sound? 1. The echo has a shorter wavelength than the original sound due to the
4 answers
1,645 views
Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 0.080 M NaOH.
chlorous
4 answers
1,552 views
Assume that 35.0 mL of a 0.13 M solution of a weak base B that accepts one proton is titrated with a 0.13 M solution of the
2 answers
1,055 views
Classify each statement as sometimes, always, or never true.
A. 2^(2/3)*4^(4/3)=8*2^(1/3) B. If x>0, then (squareroot
1 answer
397 views
I am doing a research paper on senator Debbie Stabenow and I cant find some information.
What are her years of experience,
4 answers
346 views
Consider the titration of 30.0 mL of 0.050 M NH3 with 0.025 M HCl. Calculate the pH after the following volumes of titrant have
4 answers
6,548 views
The molar solubility of MgF2 at 25°C is 1.2 10-3 mol/L. Calculate Ksp.
i got the euqation ksp= [F-]^2[Mg]2+ and plugged in
2 answers
942 views
Calculate the solubility of Mn(OH)2 in grams per liter when buffered at each of the following.
(a) pH 7.7 (b) pH 9.6 (c) pH 11.3
2 answers
738 views
how did the watergate scandal gain attention? and why was an investigation launched?
1 answer
428 views
In an excess of NH3(aq), Cu2+ ion forms a deep blue complex ion, Cu(NH3)42+, which has a formation constant Kf = 5.6 1011.
6 answers
2,214 views
Which of the following could be added to a solution of sodium acetate to produce a buffer? ?
A) acetic acid only B) acetic acid
3 answers
3,753 views
how do chromosomes move inside a cell during each stage of cell division?
2 answers
901 views
the volume of 0.220 mol of an ideal gas at 34°C is increased isothermally from an initial volume of 12.0 L.
If the final volume
1 answer
466 views
Express the second law of thermodynamics as a mathematical equation. (Select all that apply.)
For a reversible process,
2 answers
560 views
A certain constant-pressure reaction is nonspontaneous at 37°C. The entropy change for the reaction is 83 J/K. What can you
1 answer
905 views
Suppose the Sun is 1.52669 × 108
km from Earth. The speed of light is 2.99792 × 108 m/s. How long does it take for its light to
2 answers
640 views
In a series circuit, the voltage across the resistor has an amplitude of 10 V. Across the inductor it is 25 V and across the
1 answer
348 views
what was the lower courts decision of the terry v.s ohio case?
1 answer
414 views
I am doing the biology ap bacteria DNA transformation lab and I came up with a transformation efficiency of 150,000. I read
1 answer
370 views
ap biology lab -what barriers might hinder the acquisition of plasmids
1 answer
913 views
a 2.00 kg rock is dropped from a bridge to the water 50.0m below. what is the velocity as it hits the water? what is its kinetic
1 answer
342 views
james works an average of 22 hours per week with a standard deviation of 3.5 hours. what percentage of the time does james work
3 answers
635 views
solve the equation a-12/ac=2b solve for a
1 answer
250 views
in what way is the european union creating a new region?
10 answers
611 views
what natural processes spread creating a new region?
16 answers
732 views
why might many of the region's rivers flow toward the north?
6 answers
503 views
A cyclist maintains a constant velocity of
6 m/s headed away from point A. At some initial time, the cyclist is 245 m from point
3 answers
423 views
5. A researcher finds that blood alcohol levels cause progressive damage to the liver. All the mice in his study were fed the
3 answers
812 views
A staging that weighs 350 N supports two painters, one 230 N and the other 440 N. The reading in the left scale is Fl = 480 N
2 answers
555 views
1. Yest Corporation's bonds have a 15-year maturity, a 7% semiannual coupon, and a par value of $1,000. The market interest rate
3 answers
1,737 views
Find an equation of the tangent line to the graph of f(x) = (x3
− 3x2 + 1)(2x4 − 1) at x = −1.
3 answers
481 views
An ice hockey puck is sliding along a straight line so that its position is s(t) =
t3 3 + t2 + t − 7/3 . At which times t is
6 answers
423 views
On January 1, 2013, at a price of x dollars, the demand for a certain product was
D(x) = 300 x2 + 10px thousand units per month.
1 answer
368 views
The cost of producing d hundred plastic toy dinosaurs per day in a small company
is C(d) = 120 + 30d + 1 8d4 dollars. This
4 answers
567 views
Suppose a number is chosen at random from the sample space {3, 4, 5, 6, 7}. Find the probability as a fraction and percent.
1 answer
437 views
Solve the compound inequality.
-3 < 2x - 3 < 5
3 answers
549 views
3(a+5b)-7/2(2b-a)
combine like terms
4 answers
328 views
1/3(x+5=k)
solve for x
3 answers
240 views
3x2 – 12x + 7x – 28 factor the polynomial by grouping
2 answers
564 views
A clothing company uses the expressions that follow to estimate revenue and expenses based on the production of x lots of
1 answer
420 views
On a second report that you reviewed, the team simplified the expression to 4. Show how to simplify the rational expression
1 answer
675 views
A sheep with human genes spliced into it to produce human antibodies is an example of a(n)
3 answers
577 views
4. Using sunscreen and consuming energy drinks involve _____________________.
A. using biological information to make informed
5 answers
1,845 views
B. The rational expression is not defined for any values of
20^2-180/4x^2+36+ 72 for which the denominator equals zero. Find the
4 answers
434 views
how do you simplify
5-x _______ x^2-20 to = 4
4 answers
252 views
A restaurant meal for a group of people cost $85 total. This amount included a 6% tax and an 18% tip, both based on the price of
4 answers
1,602 views
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