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Erika
Questions and answers by
Erika
, page 2
Questions (211)
Suppose that bicycles are produced by a perfectly competitive, constant cost industry. Which of the following will have a larger
1 answer
928 views
you pull a sled along a horizontal surface by applying a force of 620 N at an angle of 42.0 degrees aboce the horizontal. How
2 answers
736 views
Write a program that reads test scores up to 30 into an array. sentinel will stop when -1 is entered.
Write functions that: 1.
2 answers
525 views
The variables arr1 and arr2 have been declared as pointers to integers. An array of 10 elements has been allocated, its pointer
3 answers
1,557 views
Suppose that 2,000 scientists compute 90% confidence
intervals for parameters they are interested in. How many of these intervals
1 answer
807 views
The length of a rectangle in 18 inches. What is the perimeter of the rectangle if the length is 7 incheslonger than the width?
4 answers
333 views
How do Plate tectonics affect the Atmosphere, Hydrosphere, Geosphere, and Biosphere? Thanks SO much in advance!:D
2 answers
682 views
If 2 blocks have the same mass which one has the greater acceleration?
1 answer
268 views
When people buy astronomical telescopes, they have an option to buy a set of eyepieces to go with it. If Fred bought a telescope
1 answer
425 views
What is one way in which Noble Gases are different from other elements?
a. Noble Gases have low boiling points b. Noble gases
2 answers
701 views
The placement of metal and non-metal elements in the periodic table makes it possible to predict the formation of compounds.
1 answer
506 views
A student answered the following skill-testing question to try and win a prize:
(-4)^3-(-2)^4/2^2+5^2*7^0 The students answer was
1 answer
405 views
Find the horizontal and vertical components of the velocity of a cannonball 4 seconds after being fired horizontally at 400 m/s
3 answers
612 views
A heat engine has a hot reservoir of 680°C and a cold reservoir of 220°C. What is the efficiency of the engine?
2 answers
530 views
how many moles of Cl in 2.7 mol CaCl2
2 answers
915 views
An object with a mass of 50 kg is being dragged along a horizontal floor by a horizontal force of 30 N. If the friction force
2 answers
525 views
An arrow is shot at an angle such that it's horizontal velocity is 40 m/s and it's vertical velocity is 20 m/s. Find the
1 answer
479 views
An arrow is shot at an angle such that it's horizontal velocity is 40 m/s and it's vertical velocity is 20 m/s. Find the
2 answers
1,175 views
A 50.0 Kg ball rolling at 10.0 m/s eastward (on a frictionless surface) collides with a 20.0 Kg ball rolling westward at 20.0
1 answer
417 views
Initially 1.200 mol of an ideal gas in a container occupies a volume of 3.50 l at a pressure of 3.30 atm with an internal energy
2 answers
534 views
A heat engine operates between two reservoirs at temperatures of 19.7oC and 294oC. What is the maximum efficiency possible for
2 answers
575 views
The maximum possible efficiency of a heat engine which exhaust its heat at a temperature of 46.0o is 39.0 percent. What is the
1 answer
1,129 views
A roller coaster is initially at a height of 40 m above the ground and has an initial velocity of 15 m/s. Using conservation of
1 answer
350 views
Should environmental policy focus on developing more oil resources or on developing renewable energy sources? Or, is there
3 answers
372 views
Should environmental policy focus on developing more oil resources or on developing renewable energy sources? Or, is there
3 answers
374 views
Explain what the terms chiral atom and chiral molecule mean.
write in three sentences.thanks
2 answers
993 views
figure 1
HO- ######## # # # # # # # # # # HO-# # # #-CH=CH-NH2 # # # ###### # # # ######## BENZENE RING what is the name of this
3 answers
402 views
what is the gravitational potential energy of an object to its weight multiplied by its what?
1 answer
448 views
When did the First Crusade start & end? Like as in the exact date? I can't seem to find it in any of my information books or
3 answers
453 views
A sound wave has a frequency of 686 Hz in air and a wavelength of 0.50 m. What is the temperature of the air?
1 answer
1,016 views
A sound wave has a frequency of 686 Hz in air and a wavelength of 0.50 m. What is the temperature of the air?
-Find wavelengths
1 answer
503 views
The range of human hearing extends from approximately 20 Hz to 20,000 Hz. Find the wavelengths of these extremes at a
1 answer
671 views
A group of hikers hears an echo 2.50 s after shouting. If the temperature is 20.0°C, how far away is the mountain that
2 answers
689 views
It takes pipe A 14 days to fill the fish pond. It takes pipe B 18 days to fill the same pond. Find out how pond it takes both
2 answers
714 views
Just a quick question...
how do you do futur proche in French?
4 answers
435 views
Hello!
Could someone please read this report on my trip to Paris, and correct it? Thank you! Mon voyage en France était très
4 answers
559 views
Can you check this please
i'm not sure why it's wrong .__. 1) indefinite integral of 1/t *ln(t) dt the t*ln(t) is altogether on
6 answers
451 views
Find f'(x): (abs(((x^2)*((3x+2) ^(1/3)))/((2x-3)^3))
So I thought I should split it into two parts: A and B. A) (x^2)/((2x-3)^2)
3 answers
497 views
find the indefinite integral of
(1/x)*(e^(-2log[ 3,x])) dx where 3 is base of the log i cannot even figure out where to start :(
3 answers
2,354 views
What is the English translation of:
Que veut dire VTT?
7 answers
600 views
What is the translation of "Comment s'appelle ce terrain de camping"? I know that the literal translation is, "How do you call
6 answers
521 views
How do you translate:
"May I ask some questions?" into French with correct grammar?
2 answers
751 views
I'm doing a French crossword puzzle, and I'm stuck on one of the words.
It's a four letter word like: _a_d And it fits in the
7 answers
595 views
Jon makes a bar graph that shows the number of dogs owned by members of his class. if the smallest number is 1 and the largest
1 answer
443 views
a compound containing
1 answer
251 views
I'm using chromatography to identify compounds in a leaf extract for a lab, and one of the evaluation questions is 'Suggest a
3 answers
479 views
Pleistocene mammoth bone from La Brea Tar Pits of Los Angeles, California. Age: 12,200 ± 35 years
2 answers
565 views
How would you start and finish these questions by a step by step process? Does Amp equal to Joules?
1. How many grams of aluminum
2 answers
548 views
Next year (sophomore year) I'm taking the following courses:
Honors Algebra II/Trig Spanish III Health AP Biology Honors English
4 answers
763 views
In what size populations might you expect it to be relatively common for alleles to become fixed? Why?
I think that larger
3 answers
583 views
You swing a 2.40kg stone in a circle, using the full length of a thin 60.0cm rope.
2 answers
719 views
A1 Helicopter in flight with unbalanced stores
A helicopter in forward flight is shown in Figure 1. The helicopter in forward
2 answers
601 views
Randy had a sheep that started eating more and more as each day passed. on the first day, Tandy's sheep ate 5 carrots. On the
2 answers
591 views
Find the remainder when 3^997
is divided by 5. n=1 3n/5=3/5 n=2 3^2=9/25 n=3 3^3=27/5 n=4 3^4=81/5 n=5 3^5=243/5
3 answers
428 views
In a group of 9 coins, one is fake and weighs slightly less. What is the fewest number of times you need to use a pan balance to
2 answers
578 views
What is 100^2-99^2+98^2-97^2+96^2-95^2 +...+ 4^2-3^2+2^2-1^2 ?
(Find an expression where n is the largest number being squared,
1 answer
401 views
Pick what age you would like to be (may be your actual age if you like). Add 10.
Multiply the result by 4. Add 200. Divide by 4.
3 answers
543 views
Find all pairs of integers such that when they are added they equal 100, and when they are multiplied they are at least 2000.
2 answers
981 views
Explain why the product of any two consecutive natural numbers is even. Prove your conjecture.
2 answers
804 views
If a field has perimeter P, what shape maximizes the area? Justify your reasoning.
5 answers
396 views
A jet pilot is making a 1000 mile trip in her military Tomcat. She flies 800 mph for one hour and decides she wants to finish
4 answers
459 views
A mixture is 20% red paint, 35% yellow paint, and 45% water. If 5 quarts of red paint are added to 20 quarts of the mixture,
4 answers
1,336 views
Suppose in the early 1900s the levels of CO2 in the atmosphere was only 64% of the levels of CO2 today. What percentage more is
4 answers
536 views
Suppose in a town three-fourths of the men are married to one-half of the women. What is the ratio of men to women in this town?
1 answer
483 views
A 6 story building has stairs between equally spaced doors. How many times higher is the climb from the first to the sixth floor
1 answer
472 views
Three boxes each contain a number of billiard balls. One box contains only even-numbered balls, one box contains only odd
4 answers
1,431 views
After dinner, three friends at a restaurant paid their bill and noticed a bowl of mints on the front counter. Sean took
4 answers
asked by
Erika
4,838 views
John and Miles each had some money. First Miles gave John a quarter. Then John gave Miles one-third of his money. Then Miles
1 answer
431 views
Pick any single digit number. Multipy it by 12,345,679. Then multiply the result by 9. What happens? Explain why this works.
1 answer
487 views
morgan saw 10 blue cars 8 red cars and 42 white cars drive by her house in 1 hour what is the experimental probability that the
7 answers
3,535 views
evaluate the number of carbon for the ffg. pairs by writing G if greater, L if less than or E if equal
1. butene E sym
1 answer
421 views
isobutyl tert pentyl acetylene has how many hyrogen atoms?
iso=2 butyl=4 tert=4 pentyl=5 acetylene=2 28 h atoms? can you please
1 answer
455 views
I've been try to solve this equation and I can't seem to get far. Do you add 3 to both sides? If not please explain to me how
1 answer
320 views
I'm trying to find the sum of this geometric series but I can't find a common ratio. How do I find it?
1+1/5+1/25+...
3 answers
444 views
I'm trying to find the sum of this geometric series but I can't find a common ratio. How do I find it?
1+1/5+1/25+...
2 answers
712 views
A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 17.0 m/s when the
2 answers
810 views
How do you find the Ka1 and Ka2 of oxalic acid when it is in a solution that is 1.05 M H2C2O4 and has a pH of 0.67. [C2O4^2-] =
3 answers
2,190 views
A pot containing 500 g of water at 100 degrees Celsius would require how much energy to boil off completely
1 answer
439 views
How many grams do 6.2×1024 atoms of argon
weigh? Answer in units of g.
3 answers
818 views
How many molecules are contained in 1.30
mol O2? Answer in units of molec.
3 answers
798 views
How many molecules are in 0.0700 mol NH3?
Answer in units of molec.
4 answers
554 views
How many molecules are in 24.0 g NO2?
Answer in units of molec.
2 answers
589 views
How many formula units are in 1.31 mg of
hydrogen peroxide (H2O2)? Answer in units of formula units. For 508 g of butadiene
2 answers
1,295 views
Write a balanced equation for the double-replacement precipitation reaction described, using the smallest possible integer
2 answers
997 views
Let r'(t) represent the rate of growth of a dog in pounds per year. What does r(t) represent?
What does integral of 2 to 6 r'(t)
4 answers
2,724 views
Find the average value of the function over [1,3] and all values of x in the interval for which the function:
f(x)= 4(x^2+1)/x^2
1 answer
469 views
Use the second fundamental theorem of calculus to find F'(x)
F(x)=The integral from 0 -> x^2 (Sin(x)^2)dx
2 answers
805 views
Evaluate the following integral using a geometric formula
Integral of -2 to 6: |x-1|dx
1 answer
395 views
If you can measure the length and width of a rectangle correct within .1cm then the calculateday area will be correct .1cm as
1 answer
447 views
What are the equivalent fraction and decimal for 33 1/3%?
A. 1/33 and 0.3 B. 1/33 and 3 C. 3 1/3 and 0.333333 D. 1/33 and
6 answers
1,374 views
For what value of k will x+k/x have a relative max at x=-2
2 answers
805 views
Sinx=e^y , 0 <x <pi, what is dy/dx in terms of x?
3 answers
669 views
4) Which of the following did not account for the development of the cattle industry in the 1870s & 1880s?
a) growth of a
3 answers
905 views
Physics
A scientific instrument weighing 98 pounds on the Earth is transported to another planet whose mass is 1.7 Earth masses
2 answers
496 views
The mutual gravitational attraction between two masses in space is 686 Newtons. What is the new gravitational force between
2 answers
543 views
PLEASE TELL ME THE ANSWER TO "blank 569 divided by 6 is about 400!!!!!!!!"
WHAT IS THE BLANK?!!?!?!?
3 answers
852 views
please if anyone could help me with this
question: 1. A class paid $20 for a cake and $4 per child for one slice of cheese pizza.
4 answers
570 views
T/F
The absorption lines of neon occur at slightly different wavelengths than its emission lines.
3 answers
550 views
T/F
The absorption lines of neon occur at slightly different wavelengths than its emission lines. My answer: I thought that they
2 answers
574 views
Help!!!!! What does the Quote "In winter I plot and plan, In spring I move" mean.
2 answers
868 views
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