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Most Popular Questions

Hi.Is PO4(3-) polar or non-polar? Why or why not? Thanks! Look up the electronegativity of P and O. I think I remember that O is
1. 12 answers
2. asked by Sally
3. 19,138 views
An industry currently has 100 firms, all of which have fixed costs of $16 and avg. variable cost as follows:Q Avg. Variable Cost
1. 5 answers
2. asked by Maggie
3. 17,909 views
let f(x)=square root x. if the rate of change of at x=c is twice its rate of change at x=1, then c=?what???? i don't get get it.
1. 3 answers
2. asked by david
3. 16,150 views
In a lab, we added NH3(aq) to CuSO4(aq), and the solution turned dark blue with a precipitate.The problem is that the products (
1. 3 answers
2. asked by Karl
3. 13,683 views
Identify the area of physics that is most relevant to each of the following situations. Explain your reasoning.a. a high school
1. 4 answers
2. asked by Anonymous
3. 13,585 views
1) What Physical properties, other than specific heat, could you use to help identify unknown metals?2) Why is water an
1. 5 answers
2. asked by K.
3. 12,439 views
THree blocks of masses 3m, 2m and m are connected to strings A,B, and C. The blocks are pulled along a rough surface by a force
1. 1 answer
2. asked by me
3. 11,507 views
Which element listed should have chemical properties similar to fluorine (F)A.Li B.Si C.Br D.Ne Br, along with F, a halogen
1. 5 answers
2. asked by Brian
3. 11,203 views
The line that is normal to the curve x^2=2xy-3y^2=0 at(1,1) intersects the curve at what other point?Please help. Thanks in
1. 3 answers
2. asked by Jen
3. 11,017 views
If 5 fishermen catch 5 fish in 5 minutes, how many minutes will it take 50 fishermen to catch 50 fish?If 5 fishermen catch 5
1. 11 answers
2. asked by Sam
3. 10,889 views
It takes 208.4 kJ of energy to remove 1 mole of electrons from an atom on the surface of rubidium metal. What is the maximum
1. 1 answer
2. asked by Rossi
3. 10,708 views
A student holds one end of a string in a fixed position. A ball of mass .2 kg attached to the other end of the string moves in a
1. 2 answers
2. asked by me
3. 9,983 views
hi um could you help me i have to do a music assignment and i to talk to my class about a piece of music from my fave artist
1. 1 answer
2. asked by ashley
3. 9,778 views
you are hired as the consultant to a monopolistically competitive firm. The firm reports the following information about its
1. 5 answers
2. asked by Sally
3. 9,706 views
A car travels forward with constant velocity. It goes over a small stone, which gets stuck in the groove of a tire. The initial
1. 3 answers
2. asked by me
3. 9,451 views
Question: Two substances, A and B, have the same melting point. how can you determine if they are the same without using any
1. 1 answer
2. asked by Sheryl
3. 9,449 views
A 50.0 g silver spoon at 20.0 degrees Celsius is placed in a cup of coffee at 90.0 degrees C. How much heat does the spoon
1. 2 answers
2. asked by Erica
3. 8,984 views
name a chemical sometimes used to make the specimen visible on a microscope. answer needs to be 5 letersstain thank you tell me
1. 7 answers
2. asked by jenna
3. 8,757 views
1. While following the directions on a treasure map, a pirate walks 45.0 m north, then turns and walks 7.5 m east. What single
1. 1 answer
2. asked by Anonymous
3. 8,570 views
A net torque applied to a rigid object always tends to produce?a)translational acceleration b) rotational equilibrium c)
1. 2 answers
2. asked by Diane
3. 8,240 views
Can someone help me with prime and composite numbers?Prime numbers are counting numbers that can be divided evenly bt only two
1. 20 answers
2. asked by haylo
3. 7,977 views
An object with an initial speed of 4.0 meters per second accelerates uniformly at 2.0 meters per second2 in the direction of its
1. 2 answers
2. asked by Katelyn
3. 7,881 views
page # D-76What Relation Is a Doorstep to a Doormat? Both are stepped on. no You didn't put any parameters on this and I think
1. 17 answers
2. asked by Adam
3. 7,841 views
Use linear approximation, i.e. the tangent line, to approximate 1/0.104 as follows: Let f(x)=1/x and find the equation of the
1. 1 answer
2. asked by Jojo
3. 7,629 views
Question: A student spots an unknown sample on a TLC plate and develops it in dichloromethane solvent. Only one spot, for which
1. 4 answers
2. asked by Sheryl
3. 7,588 views
Write out the net ionic equation for:Cd(NO3)2 + Na2S -----> 2NaNO3 + CdS ----- thanks!! Write out the net ionic equation for:
1. 1 answer
2. asked by Tessa
3. 7,522 views
The formula D= 5e ^-0.4h can be used to find the number of milligrams D of a certain drug that is in a patient's bloodstream h
1. 1 answer
2. asked by Erica
3. 7,458 views
Give two examples of ways that physicists model the physical world.I was wondering if this would be an effective answer for
1. 1 answer
2. asked by Anonymous
3. 7,281 views
Please check.1. Which of the following quantities are scalars, and which are vectors? a. the acceleration of a plane as it takes
1. 1 answer
2. asked by Anonymous
3. 7,114 views
What is the electronic configuration of carbide C-4?Thought it was 1s2 2s2 sp2. Thanks from Sheryl C is atomic number 6.
1. 0 answers
2. asked by Sheryl
3. 6,855 views
When aqueous copper(II)chloride reacts with aqueous ammonium phosphate, soluble ammonium chloride forms and copper(II) phosphate
1. 2 answers
2. asked by chrissy
3. 6,460 views
which element has 16 protons, 17 neutrons, and 16 electrons?Look on the periodic table. It is element number 16 since that is
1. 0 answers
2. asked by lop
3. 6,365 views
A salesperson contacts eight potential customers per day. From past experience, we know that the probability of a potentail
1. 1 answer
2. asked by Janice
3. 6,311 views
2Na3PO4 + 3CaCl2 ----> Ca3 (PO4)2 + 6NaClhow many moles of CaCl2 remain if .10 mol Na3PO4 and .40 mol CaCl2 are used? When
1. 2 answers
2. asked by Hawk
3. 6,292 views
If the function f has a continuous derivative on [0,c], the the integral(o to c) of f'(x)dx=a)f(c)-f(0) b)absolute value (f(c)-
1. 1 answer
2. asked by david
3. 6,235 views
A department store has determined that 25% of all their sales are credit sales. A random sample of 75 sales is selected and the
1. 0 answers
2. asked by Janice
3. 6,156 views
I need help on identifying four elements.1. a member of the same family as oxygen whose most stable ion contains 54 electrons.
1. 0 answers
2. asked by Salil
3. 6,061 views
A car is traveling 27 m/s when the driver sees a child standing in the road. He takes 0.8 s to react, then steps on the brakes
1. 1 answer
2. asked by Katelyn
3. 6,031 views
Four roommates are planning to spend the weekend in their dorm room watching old movies, and they are debating how many to
1. 1 answer
2. asked by Jeff
3. 5,998 views
Larry, Moe, and Jo run the only saloon in town. Larry wants to sell as many drinks as possible without losing money. Jo wants
1. 3 answers
2. asked by Alex
3. 5,969 views
The Garraty company has two bond issues outstanding. Both bonds pa $100 annual interest plus $1,000 at maturity. Bond L has a
1. 2 answers
2. asked by Dee Dee
3. 5,714 views
Discuss briefly the relationship between the dipole moment of a molecule and the polar character of the bonds within it. WIth
1. 1 answer
2. asked by someone
3. 5,704 views
Balloon- CO2Balloon- O2 Balloon- He Balloon- N2 Balloon- CH4 Represented above are five identical balloons, each filled to the
1. 4 answers
2. asked by Tina
3. 5,629 views
Why, when, and where did Abraham Lincoln say "What kills a skunk is the publicity it gives itself." ?Thanks. Since this is not
1. 1 answer
2. asked by April
3. 5,615 views
A stunt pilot of mass 55.0 kg who has been diving her airplane vertically pulls out of the dive by changing her course to a
1. 1 answer
2. asked by Kuwaiti
3. 5,570 views
Runner A is initially 6.0 km west of a flagpole and is running with a constant velocity of 9. km/h due east. Runner B is
1. 3 answers
2. asked by Lori
3. 5,515 views
Suppose that people consume only three goods, as shown in this table: (5 Marks)Tennis Balls Tennis Racquets Gatorade 1998 price
1. 2 answers
2. asked by shelby
3. 5,475 views
The ______________ gave their names and addresses to the_____________ secretary.witnesses attorneys' witnesses' attorneys
1. 1 answer
2. asked by Kallie------
3. 5,459 views
Two girls caught 25 frogs. Lisa caught four times as many as Jen did. How many frogs did Jen catch?Lisa => 4x Jen => x 4x + x =
1. 1 answer
2. asked by kievah
3. 5,381 views
Why is percival unable to remember his name and address?Please help!! :( He is one of the "littleuns". He is so traumatized by
1. 6 answers
2. asked by Help!
3. 5,373 views
What are some animals that have similar life cycle as human?Any mammal: dogs, cats, horses
1. 84 answers
2. asked by Melthea
3. 5,351 views
A .22 rifle bullet traveling at 360m/s strikes a block of wood, which penetrates to a depth of .110m. The mass of the bullet is
1. 1 answer
2. asked by Chris
3. 5,323 views
What would the refractive index value be for water compared to gasoline?
1. 0 answers
2. asked by Pam
3. 5,265 views
Identify the areas of physics involved in each of the following tests of a lightweight metal alloy proposed for use in sailboat
1. 1 answer
2. asked by Anonymous
3. 5,253 views
Asprin, C9H8O4, is prepared by reacting salicylic acid, C7H6O3, with acetic anhydride, C4H6O3, in the reactionC7H6O3(s) +
1. 5 answers
2. asked by Chris
3. 5,241 views
2.) What is the name of the landform north of 40 degrees north latitude that juts out into the Atlantic like a giant fishhook?3.
1. 8 answers
2. asked by becca
3. 5,177 views
An athlete starts at point A and runs at a constant speed of 5.40 m/s around a round track 250 m in diameter.Find the x
1. 2 answers
2. asked by Josh
3. 5,116 views
if f'(x)=cos x and g'(x)=1 for all x, and if f(0)=g(0)=0, then thelimit x--->0 fo function f(x)/g(x)= okay, so f(x)=sinx g(x)=x
1. 1 answer
2. asked by david
3. 5,083 views
A student sits on a freely rotating stool holding two weights, each of which has a mass of 3.00 kg. When his arms are extended
1. 1 answer
2. asked by nicole
3. 5,036 views
Question: What would happen to the Rf values of the pigments if you were to increase the relative concntration of acetone in the
1. 2 answers
2. asked by Sheryl
3. 4,931 views
Determine whether each of the following would cause a shift in the aggregate demand curve, the aggregate supply curve, neither,
1. 1 answer
2. asked by Jeffrey
3. 4,860 views
Which of the following is the best order of magnitude estimate in meters of the height of a mountain?a) 1 m b) 10 m c) 100 m d)
1. 3 answers
2. asked by Anonymous
3. 4,820 views
Find normals to the curve xy+2x-y=0 that are parallel to the line 2x+y=0I have the answer: at(-1,-1), y=-2x-3, and at (3,-3),
1. 1 answer
2. asked by Jen
3. 4,811 views
You have landed on an unknown planet, Newtonia, and want to know what objects will weigh there. You find that when a certain
1. 2 answers
2. asked by Veronica
3. 4,802 views
My question is basically to find out what these reactants yield:CuCl2(aq) + NH3(aq) --> ? my best guess here is... CuCl2(aq) +
1. 6 answers
2. asked by Frederique
3. 4,797 views
Who is the intended audience for the novel The Scarlet Letter?That is a good question. He wrote of historical times, of sin,
1. 1 answer
2. asked by anonymous
3. 4,785 views
A 525-N trunk is placed on an inclined plane that forms an angle of 30.0 degrees with the horizontal. What are the components of
1. 3 answers
2. asked by Suzanne
3. 4,764 views
We did a column chromatography then a TLC on extracted spinach pigments.Question: Why are the chlorophylls less mobile on column
1. 1 answer
2. asked by Sheryl
3. 4,728 views
1)The acceleration due to gravity on the moon is 1.67 m/s2. If a person can throw a stone 12.0 m straight upward o the earth,
1. 2 answers
2. asked by Genevieve
3. 4,610 views
The question is: A student performs a crystallization on an impure sample of biphenyl. The sample weighs 0.5g and contains about
1. 2 answers
2. asked by Sheryl
3. 4,609 views
I cannot solve this pattern!1,1,4,3,9,6,16,10,25,15 HINT: two different patterns are intertwined BIGGER HINT: only look at every
1. 3 answers
2. asked by Lin
3. 4,578 views
3. Suppose the Clean Springs Water Company has a monopoly on bottled water sales in California. If the price of tap water
1. 0 answers
2. asked by Mariah
3. 4,578 views
need help unscrambling a word or wordstarluna what is it HELP ME UNSCRAMBLE THESE LETTERS TO MAKE A WORD THAT PERTAINS TO SPACE
1. 157 answers
2. asked by amy
3. 4,564 views
Compounds like CCL2F2 are known as chloroflourocarbons, or CFCs. These compounds were once widely used as refrigerants but are
1. 2 answers
2. asked by Jenn
3. 4,514 views
What will be the final temperature of the water in an insulated container as the result of passing 5.00 g of steam [H2O(g)] at
1. 1 answer
2. asked by hal
3. 4,500 views
Which of the following pairs of atoms would you expect to combine chemically to form an ionic compound?A.Li and S B.O and S C.Al
1. 2 answers
2. asked by Chris
3. 4,445 views
list five integers that are congruent to 4 modulo 124, 16, 36, ... any integer of the from n*12 + 4 where n=0, 1, 2, 3...
1. 1 answer
2. asked by thisha
3. 4,444 views
A=1/2h (b1 + b2)Solve for b1 A=1/2h (b1 + b2) Solve for b1 I assume this is A = (1/2)(h)(b1 + b2); i.e., the h is in the
1. 3 answers
2. asked by ryan
3. 4,444 views
What day would yesterday be if Wednesday was five days before the day after tomorrow?pLEASE HELP ME WITH THE RIDDLE i
1. 1 answer
2. asked by Angel67
3. 4,405 views
Can you please answer this question: Both water and carbon dioxide are triatomic molecules. Explain why one of these molecules
1. 1 answer
2. asked by Beautiful
3. 4,394 views
Benzyl alcohol is not a good sovent with which to crystallize fluorenol. The melting point looks okay so I'm assuming that
1. 5 answers
2. asked by Sheryl
3. 4,386 views
Which group of elements is characterized by an s2p3 configuration?What is the electron configuration of group 15?
1. 1 answer
2. asked by Larry
3. 4,358 views
Question: A compound melting at 134 degrees C was suspected to be either aspirin (mp 135C) or urea (mp 133C) Explain how you
1. 1 answer
2. asked by Sheryl
3. 4,343 views
Page # D-74How Would You Describe a Dead Skunk? A skunked skunk. no What kind of answers do you have for the ones you have
1. 21 answers
2. asked by Adam
3. 4,339 views
I am reading "The crisis, No.1" now.What does this sentences mean "Mutual fear is the principal link in the chain of mutual
1. 2 answers
2. asked by Cam
3. 4,337 views
A 50.0 kg parachutist jumps out of an airplane at a height of 1.00 km. The parachute opens, and the jumper lands on the ground
1. 1 answer
2. asked by Becca
3. 4,316 views
A 160-N child sits on a light swing and is pulled back and held with a horizontal force of 100N. The tension force of each of
1. 1 answer
2. asked by diane
3. 4,309 views
For a particular nonlinear spring the relationship between the magnitude of the applied for F and the resultant displacement x
1. 1 answer
2. asked by me
3. 4,260 views
Three volatile compounds X,Y, and Z each contain elements Q. The precent by weight of element Q in each compound was determined.
1. 8 answers
2. asked by Brianna
3. 4,232 views
If y is a differentiable function of x, then the slope of the tangent to the curve xy - 2y + 4y^2 = 6 at the point where y=1 is
1. 2 answers
2. asked by Jen
3. 4,190 views
Two elements, R and Q, combine to form two binary compounds. In the first compound, 14.0 g of R combines with 3.00 g of Q. In
1. 0 answers
2. asked by Shell
3. 4,187 views
A 1-kg block is lifted vertically 1m by a boy. The work done by the boy would be one jule or would no work be done. I'm
1. 1 answer
2. asked by susane
3. 4,183 views
Question: An unknown compound gave a melting point of 230C. When the molten liquid solidified, the melting point was
1. 1 answer
2. asked by Sheryl
3. 4,178 views
A 2.00 METER TALL BASKETBALL PLAYER ATTEMPTS A GOAL 10.00 METERS FROM THE BASKET(3.05 METERS HIGH). IF HE SHOOTS THE BALL AT A
1. 1 answer
2. asked by Jill Hefner
3. 4,170 views
d/dx( ln |sin(pi/x)| ) = ?Thanks. If those are absolute value signs, the derivative will not exist when sin (pi/x) = 0, because
1. 1 answer
2. asked by Jen
3. 4,148 views
A SHORT WAY OF WRITING A WORD CONSISTING OF SOME OF THE LETTERS IN THE WORD FOLLOWED BY A PERIOD.What is an abbreviation?
1. 1 answer
2. asked by SHORTY
3. 4,127 views
in Act I, Scene iii, line 19 the witches say "I'll drain him dry as hay" I have to explaion this quotation but i don't quite
1. 0 answers
2. asked by please help
3. 3,984 views
What is my number?clue 1. my number is a multiple of 2 and 7 clue 2. My number is less than 100 but larger than 50. clue 3. My
1. 7 answers
2. asked by arochimero
3. 3,960 views
When 2.5g of NaOH were dissolved in 49.0g water in a calorimeter at 24.0 C, the temperature of the solution went up to 37.1 C.a.
1. 0 answers
2. asked by DrBob222
3. 3,946 views
A car with good tires on a dry road can decelerate at about 5.0m/s/s when braking. If the car is traveling at 55miles/hour, how
1. 2 answers
2. asked by Savannah
3. 3,933 views

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