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Ethan
Questions and answers by visitors named
Ethan
Questions (221)
A certain diving bell for use in the ocean has a square window measuring 0.250 m on each side. The inside of the bell is
2 answers
732 views
When copper(II) nitrate reacts with sodium hydroxide, copper (II) hydroxide is produced. How many grams of Cu(OH)2 can be
5 answers
2,713 views
Complete and balance the following equation:
Cr2O7{2-}(aq)+CH3OH(aq)-->HCO2H(aq)+Cr{3+}(aq) Any feedback would be great, thank
2 answers
1,001 views
Acute angle W has sinW=4/sqrt97 and tanW=4/9. Which are values of cscW and cotW?
cscW=9/sqrt97 and cotW=4/sqrt97 cscW=sqrt97/4
4 answers
406 views
1. Present Values. Compute the present value of a $100 cash flow for the following combinations of discount rates and times.
a. r
3 answers
589 views
given two containers, one holding 4 gal. and the other holding 3 gal. how does one measure out two gal.?
Fill the 3 gal, pour it
1 answer
1,024 views
Which of the following argues in favor of using Gross Domestic Product as a measure of economic well-being?
1 answer
431 views
Question on study guide that i don't get.
Bill O’Really of OX News observed that poultry (chicken and turkey) consumption in
2 answers
721 views
f(x) = x + 7 if x < or equal to 5
F(x) = 7 if x >5 what is the limit as x is approaching 5 from the left side????? I know that
1 answer
411 views
What is the limit as x approaches -1
of x - 5 --------------------- 4x(squared)-6x+ 3
1 answer
390 views
x(squared)+8x+17 if x < or = -4
Let f(x)= 2 if x= -4 -x(squared)-8x-15 if x > -4 Show that f(x) has a removable discontinuity at
1 answer
414 views
Where does clay come from?
1 answer
398 views
how do i find the inverse of f(x)= (3x+7)/(x-2)
3 answers
306 views
Sodium phosphate, Na3PO4, reacts with HCl to form H3PO4 and NaCl. How many liters of 0.1 M HCl are required to react with 0.1
4 answers
2,339 views
you buy a bottle of juice for $1.00. The juice costs 90 cents more than the empty bottle. How much does the empty bottle cost?
7 answers
1,358 views
Which of the following would be the limiting reagent in the reaction shown below? There are 50 molecules of O2 and 50 molecules
4 answers
2,425 views
For the reaction 2Na(s) + Cl(g) �¨2NaCl(s), how many grams of NaCl could be produced from 103.0 g of Na and 13.0 L of Cl (at
1 answer
454 views
I have no idea how to do this activity..can someone please help!?
In this activity you will investigate how chemical reactions
3 answers
565 views
How would I find three different quotients that equal 5 to the negative 7th
2 answers
981 views
Where is the adverb located in the following sentence?
"Timothy was not so sure that he liked Ethan as much now that he was being
3 answers
368 views
y+2x=3, y+2x=-4
1 answer
260 views
What are some good intepretive discussion questions for the book This Boy's Life by Tobias Wolff
1 answer
853 views
Homework Help!!! (Books)?
I have a homework assignment and I really need help. I'll be very thankful and pleased if anyone can
3 answers
550 views
What would a good essay title be if I'm writing an essay about a character in a book who is torn between two conflicting forces?
5 answers
569 views
A precipitate of calcium phosphate is formed when aqueous solutions of sodium phosphate and excess calcium chloride are mixed.
2 answers
1,377 views
I need to draw a diagram showing delta, oxalate, tributary and meander.
I also need to draw a diagram showing water table, zone
2 answers
539 views
Describe situations where no work is done and situations where work would be done?
1 answer
349 views
When an object is thrown into the air, relate it's mechanical energy to kinetic and gravitational energy.
1 answer
420 views
A unit of area often used in measuring land areas is the hectare, defined as 104 m2. An open-pit coal mine consumes 99 hectares
2 answers
1,109 views
Because Earth's rotation is gradually slowing, the length of each day increases: The day at the end of 1.0 century is 1.0 ms
4 answers
1,433 views
A hot-air balloon is ascending at the rate of 13 m/s and is 62 m above the ground when a package is dropped over the side. (a)
2 answers
661 views
During a hard sneeze, your eyes might shut for 0.58 s. If you are driving a car at 92 km/h during such a sneeze, how far does
3 answers
737 views
A startled armadillo leaps upward, rising 0.515 m in the first 0.203 s. (a) What is its initial speed as it leaves the ground?
3 answers
1,116 views
A car travels up a hill at a constant speed of 33 km/h and returns down the hill at a constant speed of 60 km/h. Calculate the
3 answers
504 views
(a) If the position of a particle is given by x = 16t - 7t3, where t is in seconds and x is in meters, when is the particle's
2 answers
808 views
An electric vehicle starts from rest and accelerates at a rate of 2.3 m/s2 in a straight line until it reaches a speed of 17
2 answers
1,170 views
An electron moving along the x axis has a position given by x = 14 te-t m, where t is in seconds. How far is the electron from
1 answer
1,090 views
The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May it cost her $410 to drive 300 mi
3 answers
1,002 views
factor 6x^2-1
1 answer
237 views
factor 7x+42
1 answer
290 views
If a ball is thrown in the air with a velocity 44 ft/s, its height in feet t seconds later is given by y = 44t - 16t2. (Round
6 answers
9,469 views
I have to write an outline on The Sun Also Rises by Ernest Hemingway, and I can't seem to find an appropriate thesis statement
2 answers
514 views
take the first definition then double one letter to spell a word
Example Slang word for a police officer - cop A place wher
3 answers
392 views
If B is added to C = 6.5i + 4.6j, the result is a vector in the positive direction of the y axis, with a magnitude equal to that
2 answers
546 views
If a - b = 2.4c, a + b = 5.8c, and c = 1.3i + 4.9j, then what are (a) the x component of a, (b) the y component of a, (c) the x
1 answer
322 views
Only two horizontal forces act on a 9.1 kg body. One force is 5.3 N, acting due east, and the other is 1.6 N, acting 56° north
2 answers
542 views
What is the length of the midsegment of the trapezoid made by the vertices A(0, 5), B(3, 3), C(5, -2) and D(-1, 2). Show
2 answers
1,072 views
H(x)= 0.002x^2+0.005x-0.029 where x is the speed of the car in miles per hour.
How can I rewrite the function so that x represe
1 answer
1,100 views
H(x)= 0.002x^2+0.005x-0.029 where x is the speed of the car in miles per hour.
How can I rewrite the function so that x represe
1 answer
344 views
What would the function
H(x)=0.002x^2+0.005x-0.029 look like?
3 answers
403 views
I am a number between 20 and 30.When you put me into 6 equal groups,there is an even number in each group and 1 left over. i
1 answer
418 views
A chain is held on a frictionless table with 1/3 of its length hanging over the edge. If the chain has length L = 33 cm and mass
4 answers
989 views
what is the rule of a table with x numbers of 1, 4, 8, and 9 and y numbers of 5, 14, 26, and 29
1 answer
276 views
Use the product rule to find the derivative of (2x^2 + 3)(3x + 5).
1 answer
343 views
Use the product rule to find the derivative of (2x^2 + 3)(3x + 5).
3 answers
845 views
lim sin2x
x->0 ----- x How do I get rid of the x on the bottom in order to solve this problem? Thanks!
1 answer
402 views
At a county fair, a boy takes his teddy bear on the giant Ferris wheel. Unfortunately, at the top of the ride, he accidentally
3 answers
1,099 views
insert grouping symbols into 2x3^3+4 to get it to equal 4374 and 279,936.
1 answer
347 views
350.ml of .25M KOH is reacted with 250.ml of .30M H3PO4. Determine which is the limiting reagent, the molarity of the salt
3 answers
568 views
the measure of an angle is 7 less than 10 times its supplement
4 answers
716 views
given the graph of f(x) = x sinx, 0<=x<=2pi
assuming that a quantity y changes at a rate of y' = xsinx, find by how much it will
2 answers
592 views
given the graph of f(x) = x sinx, 0<=x<=2pi
assuming that a quantity y changes at a rate of y' = xsinx, find by how much it will
2 answers
957 views
given the graph of f(x) = x sinx, 0<=x<=2pi
assuming that a quantity y changes at a rate of y' = xsinx, find by how much it will
1 answer
376 views
Expand [1+x^2(1+x)]^7 in ascending powers of x as the term in x^8.
3 answers
560 views
Janice said that if you cut a cube into two parts you form 2 smaller cubes. Ling said that 2 rectangular prisms are formed. Who
1 answer
401 views
The widths (in meters) of a kidney-shaped swimming pool were measured at 3-meter intervals as indicated in the figure. Use the
3 answers
2,377 views
In 69 games, a player blocks 234 shots, what is his blocks per ratio?
1 answer
339 views
Need a lot of help!
Specific gravity of a drug is 0.9815. How many cc of this drug should be administered for a dose of 215mg?
5 answers
361 views
When a particle is located a distance x meters from the origin, a force of cos(x/4) newtons acts on it. How much work W is done
3 answers
556 views
Can you please give me a example of a - and + multi step equation
1 answer
318 views
An 845-N sled is pulled a distance of 190 m. The task requires 1.70 104 J of work and is done by pulling on a rope with a force
3 answers
458 views
Karen has a mass of 62.60 kg and she rides the up escalator at Woodley Park Station of the Washington D.C. Metro. Karen rode a
2 answers
924 views
A 40.7kg wagon is towed up a hill inclined at 18.1 degrees with respect to the horizontal. The tow rope is parallel to the
1 answer
954 views
The tension in a string from which a 5.4kg object is suspended in an elevator is equal to 53.02N. What is magnitude of the
2 answers
528 views
A figure skater begins spinning counterclockwise at an angular speed of 4.6π rad/s. During a 4.6s interval, she slowly pulls
3 answers
1,641 views
A girl sitting on a merry-go-round moves
counterclockwise through an arc length of 3.36m. If the girl’s angular displacement is
2 answers
1,355 views
A diver performing a double somersault spins at an angular speed of 4.5 π rad/s precisely 0.70s after leaving the platform.
Assu
3 answers
1,490 views
Cytochrome, a complicated molecule that we will represent as CyFe2+, reacts with the air we breathe to supply energy required to
1 answer
660 views
Consider the voltaic cell
Zn(s) + Cu{2+}(aq)--> Zn{2+}(aq)+Cu(s) {}=charge Under standard conditions, what is the maximum
4 answers
7,290 views
A voltaic cell utilizes the following reaction and operates at 298K
3Ce{4+}(aq)+Cr(s)--->3Ce{3+}(aq)+Cr{3+}(aq) {}=Charge What is
1 answer
641 views
A voltaic cell utilizes the following reaction and operates at 298K
3Ce{4+}(aq)+Cr(s)--->3Ce{3+}(aq)+Cr{3+}(aq) {}=Charge What is
4 answers
3,041 views
Calculate the cell potential for this voltaic cell at 298K if it is constructed using solutions of .25M Ni(NO3)2 and .01M
2 answers
640 views
Jim begins a job with a starting salary of 27000 dollars. she is guaranteed a raise of 4.75% each year. Sarah also starts a job
3 answers
529 views
An external force F is holding a bob of mass 725 g in a stationary position. The angle that the massless rope makes with the
4 answers
882 views
graph each set of lines to form a triangle. find the area and perimeter.
y=2, x=5 , and y=x Answer is Area = 4.5 units Perimeter
4 answers
1,492 views
This is a projectile motion question.
A ball with a mass of .4 kg, initially at rest is kicked directly toward a 3 meter fence
2 answers
565 views
In a 1.0× 10–4 M solution of HClO(aq), identify the relative molar amounts of these species from most to least: HClO, OCl,
1 answer
798 views
An object is dropped from rest.
What is its instantaneous speed when it has been in motion for 7 s? The acceleration of gravity
3 answers
662 views
Can you help
1 answer
259 views
A cylindrical slime tank is placed so that the axis of the cylinder is horizontal. Find the fluid force on a circular end of the
4 answers
755 views
A spherical oil tank with a radius of 10 feet is half full of oil that weighs 60 pounds per cubic foot. Its top is 6 feet
1 answer
484 views
In guinea pig, short hair (L) is dominant to long hair (l) and the heterozygous condition for yellow coat (Y) and white coat (y)
4 answers
2,053 views
Two stars are 4.40 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of
2 answers
572 views
Calculate the momentum of a 0.1 kg rifle bullet traveling 500 m/s. Answer in units of kg•m/s
1 answer
454 views
What is the value of w (work) when 1.3 moles
of H2 expands from 25 liters to 50 liters against a constant external pressure of 1
2 answers
803 views
Calculate the entropy change when 4.88 g of H2 reacts with O2 according to the
reaction 2H2(g) + O2(g)→2H2O(ℓ)at 298 K and 1
2 answers
606 views
Calculate the pH of a 0.44 M aqueous solution
of NH4Cl. Kb = 1.8 × 10−5 . I've tried used the Ka=Kw/Kb equation then used the
4 answers
1,557 views
Calculate the pH of a 0.44 M aqueous solution
of NH4Cl. Kb = 1.8 × 10−5 . I've tried used the Ka=Kw/Kb equation then used the
7 answers
838 views
What was the purpose of the Adams-Onis Treaty?
Can some help me answer this question?? Ms. Sue??
2 answers
661 views
Calculate the concentration of H3O
+ present in 0.377 M H2CO3. Answer in units of mol/L I know the Ka of H2CO3 is 4.3E-7. But I
5 answers
751 views
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