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2. To leave the gravitational ﬁeld of a planet, a space rocket must be launched at an escape velocity of:ve =r2GM r , where G
1. 3 answers
2. 666 views
Explain 1 External and 1 Internal conflict From the book Found by: Margret Peterson Haddix. Make sure it includes: who it
1. 2 answers
2. 547 views
1. Which of the following traits is acquired?A.) The number of petals that grow in a plants flower B.) the wing shape of a wild
1. 5 answers
2. 1,694 views
Explain 1 External and 1 Internal conflict From the book Found by: Margret Peterson Haddix. Make sure it includes: who it
1. 3 answers
2. 423 views
What are the major stars of Gemini?? Name 4 of them...Explain the myth behind the constellation "the twin"
1. 1 answer
2. 468 views
-list some of George Washington precedent-describe Thomas Jefferson achievement before becoming president of the United States -
1. 2 answers
2. 719 views
Find the domain of the given function f. (Enter your answer using interval notation.)f(x) = 1/(x2 − 8x + 16)
1. 1 answer
2. 1,574 views
A right triangle is drawn on a coordinate plane. Its base is the line segment between(2, 2) and (9, 2). The hypotenuse is a line
1. 1 answer
2. 897 views
Find every point on the horizontal liney = 5 that is a distance of 5 units away from the point (6, 1).
1. 1 answer
2. 700 views
are these sentences correctJ'ai mangé des pâtes delicieuses J'ai mangé de delicieuses pâtes
1. 1 answer
2. 469 views
Should cellphone be used at school everyday!!!Why or why not...
1. 1 answer
2. 308 views
Show that the gravitational potential at the surface of the Earth is -64 MJ kg-1, given the surface gravitational feild strength
1. 1 answer
2. 485 views
At pH 9 what will the ratio of ammonium to ammonia be? The pKa of ammonium is 9.24?
1. 0 answers
2. 395 views
A teacher is showing her class how to fold a square piece of paper to create a paper cup. One of the steps is shown below.
1. 1 answer
2. 614 views
A cookie recipe calls for 2/3 of a cup of flour and makes half a dozen cookies. How many cookies can you make if you have 9 cups
1. 1 answer
2. 1,891 views
The record for the fastest speed on a bicycle is 133 kilometers per hour. How long would it take a person traveling at this
1. 8 answers
2. 1,277 views
Assume the truck is going at v0 = 25 m/s, and you're 20 m behind the truck. You decide to accelerate at a = 1.0 m/s2 to pass the
1. 2 answers
2. 2,783 views
A 0.15kg bullet is fired into a 1.85kg block that is hanging from a 45cm string. What minimum initial bullet speed is required
1. 6 answers
2. 818 views
describe a situation where a trend line would be useful
1. 1 answer
2. 347 views
log2(-3sinx)=2log2(cosx)+1 solve for x
1. 2 answers
2. 889 views
Compound X contains only carbon, hydrogen, nitrogen, and chlorine. When 1.00 g of X is dissolved in water and allowed to react
1. 1 answer
2. 1,094 views
A contractor buys 14 yd of nylon carpet and 20 yd of wool carpet for $1738. A second purchase, at the same prices, includes 16
1. 1 answer
2. 1,007 views
Suppose that 16% of the CD's that are distributed are defective. If you choose 5 CD's randomly, what is the probability that at
1. 2 answers
2. 443 views
How do integrate this with respect to x?integral of ((x^y)/y!)e^(-2x) from 0 to infinity The e is an exponential. The answer is
1. 1 answer
2. 364 views
c//d,<7 and< are= corresponding angles
1. 1 answer
2. 460 views
a 5.000ml aqueous sample containing hydrogen peroxide as diluted to 25ml and analyzed by titration with permanganate.2MnO4- +
1. 2 answers
2. 1,232 views
describe the impact the french and Indian war had on Florida?
1. 1 answer
2. 727 views
Is it true that the higher the boing point, the higher the vapor pressure?
1. 1 answer
2. 511 views
Rank the following in order of decreasing vapor pressure, and briefly explain the observed trend in vapor pressure:Acetic Acid
1. 1 answer
2. 710 views
Would copper (II) phosphate be nonpolar?
1. 1 answer
2. 621 views
The distance a bicycle travels with each turn of its wheels is about 3 1/7 times the tire diameter. The tires on Mike's bicycle
1. 3 answers
2. 2,063 views
How can you tell if a compound is polar or nonpolar? Is it just by lewis structures? what would copper (II) phosphate be?
1. 0 answers
2. 483 views
When given different elements and asked for the highest boiling point, do you figure out the molar mass and pick the highest one
1. 3 answers
2. 581 views
Describe the role of shariah in Islam. What types of laws would one expect to find within Islamic governments, and how are they
1. 1 answer
2. 510 views
Automotive airbags inflate when sodium azide, NaN3, rapidly decomposes to its constituent elements according to the chemical
1. 2 answers
2. 2,414 views
Convert x''+ sin(x) = 0 into a first order system of equations. (x'' refers to the second derivative of x).I tried: y1 = sin(x)
1. 1 answer
2. 465 views
1. determine whether the equation represents a direct variation , if it does find the constant of the vartion2y=5x+1
1. 2 answers
2. 2,173 views
Calculate the pressure of 4.80g of ozone, O3, in a 2.45 L flask at 25 degrees C. Assume that the ozone completely decomposes to
1. 4 answers
2. 817 views
What is the volume of the gas in a balloon at -195 degrees C if the balloon has been filled to a volume of 5.0L at 25 degrees C?
1. 3 answers
2. 441 views
Calculate the density of methane gas, CH4, in kilograms per cubic meter at 25 degrees C and 956 mmHg.I got .8252 g/L but am
1. 2 answers
2. 1,096 views
Calculate the pressure in an evacuated 250mL container at 0 degrees C when the O2 in 1.00 cm^3 of liquid oxygen evaporates.
1. 1 answer
2. 460 views
I have to write a two page paper about a journal article. The article is "Beware the Next Big Thing" published in the Harvard
1. 1 answer
2. 590 views
Isomers are compounds that have the same number and kinds of atoms but have a different arrangement of the atoms. The enthalpies
1. 1 answer
2. 578 views
Nitrogen and oxygen can react directly with one anotheer to produce nitrogen dioxide according toN2(g) + 2O2(g) --> 2NO2(g) The
1. 2 answers
2. 1,352 views
Oxyacetylene torches are fueled by the combustion of acetylene, C2H2.2C2H2(g) + 5O2(g) --> 4 CO2(g) + 2H2O(g) If the enthalpy
1. 1 answer
2. 1,860 views
In what ways were diverse people from the Arabian Peninsula through the Middle East, North Africa, and into Spain united? What
1. 3 answers
2. 599 views
Why are the two words "alkaline" and "earth" used to name the group 2 metals?
1. 0 answers
2. 472 views
Which of the following nitrogen-containing compounds would supply the most nitrogen per gram of fertilizer?a. iron azide,
1. 1 answer
2. 731 views
2. Consider the ball example in the introduction when a ball is dropped from 3 meters. After the ball bounces, it raises to a
1. 1 answer
2. 4,821 views
Describe how you would prepare 500 mL of a 0.10 M solution of HCl from a 12.0 M solution of HCl.
1. 3 answers
2. 1,204 views
Mg+2HCl--->MgCl2+H2Using the balanced equation, how many moles of H2 will you make if you start with .00082 moles of Mg solid?
1. 1 answer
2. 807 views
A curling stone with a mass of 18 kg slides 38m across a sheet of ice in 8.0 s before it stops because of friction. What is the
1. 2 answers
2. 5,272 views
An object initially at rest experiences an acceleration of 9.8 m/s^2. How much time will it take to achieve a velocity of 58
1. 1 answer
2. 1,142 views
A chemistry student used the symbol "sx" to represent an s orbital that lies along the x-axis. Is this reasonable. Justify your
1. 1 answer
2. 526 views
What information about an electron in an atom is given by the following quantum numbers?2px+1/2 Answer? (idk if this is right) :
1. 1 answer
2. 490 views
Solve the system of linear equations and check any solutions algebraically. (If there is no solution, enter NO SOLUTION. If the
1. 2 answers
2. 895 views
The drawing shows four point charges. The value of q is 1.4 μC, and the distance d is 0.86 m. Find the total potential at the
1. 1 answer
2. 790 views
I'm just looking for some ideas for an essay on a Tale of Two Cities.... it can be anything related to the book... and I'm not
1. 1 answer
2. 628 views
When 22.3 mL of 1.00 M AgNO3 is mixed with 21.7 mL of 1.50 M NaCl, the temperature of the mixture rises for 21.6 degrees C to
1. 3 answers
2. 781 views
A train leaves New York for Boston, 200 miles away, at 3:00 P.M. and averages 70 mph. Another train leaves Boston for New York
1. 3 answers
2. 916 views
A hypothetical element has two main isotopes with mass numbers of 56 and 59. If 61.00% of the isotopes have a mass number of 56
1. 1 answer
2. 1,206 views
Complete the table assuming continuously compounded interest. (Round your answers to two decimal places.)Initial Investment:
1. 3 answers
2. 4,614 views
Determine a polynomial function of degree 3 with real coefficients whose zeros areƒ{2, 1+i .
1. 1 answer
2. 527 views
When 22.3 mL of 1.00 M AgNO3 is mixed with 21.7 mL of 1.50 M NaCl, the temperature of the mixture rises for 21.6 degrees C to
1. 4 answers
2. 474 views
In phylogenetics, we use the terms monophyletic, polyphyletic, and paraphyletic. What do each of these terms mean? How might the
1. 0 answers
2. 596 views
What are the three conditions that must be met for natural selection to occur? What should happen if those three conditions are
1. 1 answer
2. 1,098 views
Why is the Hardy-Weinberg Theorem useful for studying evolutionary change? What are the assumptions of this model? How does it
1. 0 answers
2. 519 views
A 52 in. board is cut into two pieces. One piece is three times the length of the other. Find the length of the other piece.
1. 1 answer
2. 539 views
A ball of mass 0.6 kg, initially at rest, is kicked directly toward a fence from a point 20 m away.The velocity of the ball as
1. 0 answers
2. 1,088 views
A 0.1592g sample of a hydrocarbon upon combustion analysis produces 0.5008g CO2. Its molar mass is found in another experiment
1. 3 answers
2. 700 views
I have to write a paper about the the similarities and differences of Ancient China and Persia. Anyone know any good websites I
1. 3 answers
2. 572 views
A luxury car rental company charges $150 per day in addition to a flat fee of $50 for insurance.Write an equation that
1. 2 answers
2. 1,268 views
4.760 g of a substance (containing only C, H, and O) is burned in a combustion analysis apparatus.The mass of CO2 produced is
1. 1 answer
2. 562 views
Let u=f(r) and r=|x|=((x1)^2 +···|(xn)^2)^1/2.Show that􏰀 ∑ (∂u/∂xj)^2 = (f′(r))^2 Please help! it's an assignment
1. 1 answer
2. 591 views
Q: 26.30mL of 0.1105 mol/L H3PO4 solution is neutralized by 139.50 mL of KOH.Calculate the mass of solid KOH required to prepare
1. 1 answer
2. 692 views
An incline is divided into 6 equal lengths. Starting from rest a ball accelerates down the incline. It takes 0.21 seconds to
1. 1 answer
2. 407 views
A student drops a rock from a bridge to the water 12.0 meters below. With what speed does the rock hit the water?
1. 3 answers
2. 2,611 views
Two hikers are climbing up a mountain and one throws a first aid kit up to another at an initial velocity of 11 m/s and at an
1. 1 answer
2. 422 views
Examples of natural rights in declaration of independence!Please Help
1. 14 answers
2. 871 views
Is this correct grammar? Sarah has 6 oranges. Ted has 7 oranges. How many oranges do they have altogether?
1. 1 answer
2. 485 views
The number of moles and the mass of oxygen formed by the decomposition of 1.252 g of mercury(II) oxide.I don't understand how to
1. 0 answers
2. 597 views
A medical rescue helicopter is flying at an average speed of 172 miles per hour toward its base hospital. At 2:42 p.m., the
1. 0 answers
2. 1,259 views
Lockers are numbered with consecutive positive integers beginning with 1, and the digit 2 is used exactly 106 times (including
1. 3 answers
2. 2,460 views
What is the mass of 225ml of a liquid that has a density of 0.880g/ml
1. 1 answer
2. 1,987 views
A 70-kg man and a 50-kg woman are in a 60-kg boat when its motor fails. The man dives into the water with a horizontal speed of
1. 0 answers
2. 503 views
A list of transactions contains 100 numbers: 60 gains and 40 losses. The gains are positive numbers and the the losses are
1. 0 answers
2. 548 views
I'm having trouble with knowing the relations between quantum numbers n, l, m(sub l), and m(sub s). Could you please explain?
1. 1 answer
2. 432 views
Can someone help me answer this questions?Why did a totalitarian regime rise in Germany in the 1930s? Explain at least three
1. 3 answers
2. 592 views
sapphire island is open 7 days a week the park has 8 ticket booth and each booth has a ticket seller from 10:00 AM to 5:00 PM on
1. 6 answers
2. 2,182 views
how did the Europeans perceive themselves in the world during the1450s through the 1700s
1. 5 answers
2. 496 views
Find the inverse function of f(x)=5 + \sqrt[3]{x}.so f^-1(x) equals...? I'm not sure how to approach this problem.
1. 1 answer
2. 391 views
You have 75.0 mL of a 2.50 M solution of Na2CrO4 (aq). You also have 125 mL of a 2.15 M solution of AgNO3 (aq). Calculate the
1. 1 answer
2. 3,714 views
When Bruce started bowling, he won 1/4 of the games he played. Within six months, he was winning 7/16 of his games. If he
1. 5 answers
2. 1,055 views
sin(arctan(-3pi/4))
1. 1 answer
2. 414 views
You are standing at the peak of a mountain that is 14000 feet above sea level. The angle of depression from this peak to a
1. 2 answers
2. 2,079 views
There's a question I've been having difficulty solving, and I would really appreciate if you can show he steps to how I can
1. 1 answer
2. 516 views
There's a question I've been having difficulty solving, and I would really appreciate it if you can explain to me how I can
1. 1 answer
2. 562 views
How do you multiply 2 square roots?
1. 1 answer
2. 379 views
Hi so I read the book The Impossible Rescue by Martin Sandler and I need 3 main ideas and 3 pieces of evidence for each can
1. 2 answers
2. 462 views
25cm^3 H2SO4 is neutralized by 40 cm^3 of 0.03 mol/dm^3 KOH. What is the molar concentration of H2SO4?
1. 2 answers
2. 521 views

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